Journalists covering the Trump-Kim summit were given free USB fans -- but security experts warn they may be Trojan horses full of malware

  • Journalists at the Trump-Kim summit in Singapore were given free USB-powered fans as a gift.
  • Security experts say that anyone who plugs it in is at risk of getting hacked. 

Journalists covering the summit between President Donald Trump and North Korean leader Kim-Jong Un in Singapore were given a fun gift bag that included a water bottle, a trial to The Straits Times newspaper, and a tourism guide to the island where it's taking place.

It also included a tiny fan that plugs into a mini-USB port or iPhone Lightning port for power, according to tweets from the historic event.

It could be a nice gesture from the hosts. As Dutch journalist Harald Doornbos wrote in a tweet about the fan, "it is pretty hot here in Singapore," according to a translation from the BBC

40 PHOTOS
Scenes from Donald Trump and Kim Jong Un's summit in Singapore
See Gallery
Scenes from Donald Trump and Kim Jong Un's summit in Singapore
North Korea's leader Kim Jong Un (L) shakes hands with US President Donald Trump (R) at the start of their historic US-North Korea summit, at the Capella Hotel on Sentosa island in Singapore on June 12, 2018. - Donald Trump and Kim Jong Un have become on June 12 the first sitting US and North Korean leaders to meet, shake hands and negotiate to end a decades-old nuclear stand-off. (Photo by SAUL LOEB / AFP) (Photo credit should read SAUL LOEB/AFP/Getty Images)
U.S. President Donald Trump walks with North Korean leader Kim Jong Un at the Capella Hotel on Sentosa island in Singapore June 12, 2018. REUTERS/Jonathan Ernst
North Korea's leader Kim Jong Un visits The Marina Bay Sands hotel in Singapore, June 11, 2018. REUTERS/Edgar Su
U.S. President Donald Trump flanked by Secretary of State Mike Pompeo and White House Chief of Staff John Kelly attend a lunch with Singapore's Prime Minister Lee Hsien Loong and officials at the Istana in Singapore June 11, 2018. REUTERS/Jonathan Ernst TPX IMAGES OF THE DAY
US President Donald Trump (R) gestures as he meets with North Korea's leader Kim Jong Un (L) at the start of their historic US-North Korea summit, at the Capella Hotel on Sentosa island in Singapore on June 12, 2018. - Donald Trump and Kim Jong Un have become on June 12 the first sitting US and North Korean leaders to meet, shake hands and negotiate to end a decades-old nuclear stand-off. (Photo by SAUL LOEB / AFP) (Photo credit should read SAUL LOEB/AFP/Getty Images)
Retired American professional basketball player Dennis Rodman speaks to the press as he arrives at Changi International airport ahead of US-North Korea summit in Singapore on June 11, 2018. - North Korea's Kim Jong Un and US President Donald Trump meet on June 12 for an unprecedented summit in an attempt to address the last festering legacy of the Cold War, with the US President calling it a 'one time shot' at peace. (Photo by ADEK BERRY / AFP) (Photo credit should read ADEK BERRY/AFP/Getty Images)
The motorcade of U.S. President Donald Trump travels towards Sentosa for his meeting with North Korean leader Kim Jong Un, in Singapore June 12, 2018. REUTERS/Edgar Su TPX IMAGES OF THE DAY
Singapore's Foreign Minister Vivian Balakrishnan takes a selfie with North Korea's leader Kim Jong Un during a visit in Merlion Park in Singapore, in this photo taken by Kyodo June 11, 2018. Mandatory credit Kyodo/via REUTERS ATTENTION EDITORS - THIS IMAGE WAS PROVIDED BY A THIRD PARTY. MANDATORY CREDIT. JAPAN OUT. NO COMMERCIAL OR EDITORIAL SALES IN JAPAN.
SINGAPORE - JUNE 11: (----EDITORIAL USE ONLY MANDATORY CREDIT - 'MINISTRY OF COMMUNICATIONS AND INFORMATION, REPUBLIC OF SINGAPORE / HANDOUT' - NO MARKETING NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTS----) U.S. President Donald Trump (L) meets with Singapore's Prime Minister Lee Hsien Loong (R) to attend a bilateral meeting at the Istana, Singapore on June 11, 2018. (Photo by Ministry of Communications and Information, Republic of Singapore / Handout/Anadolu Agency/Getty Images)
Kim Jong Un, North Korea's leader, center, tours the Esplanade in Singapore on Monday, June 11, 2018. Kim smiled and waved to a cheering crowd during a surprise late-night tour of Singapore on the eve of his summit with U.S. President Donald Trump. Photographer: SeongJoon Cho/Bloomberg via Getty Images
U.S. President Donald Trump shakes hands with North Korean leader Kim Jong Un at the Capella Hotel on Sentosa island in Singapore June 12, 2018. REUTERS/Jonathan Ernst
U.S. President Donald Trump and Singapore's Prime Minister Lee Hsien Loong walk together during a meeting at the Istana in Singapore June 11, 2018. REUTERS/Jonathan Ernst
Kim Jong Un, North Korea's leader, center, tours the Esplanade in Singapore on Monday, June 11, 2018. Kim smiled and waved to a cheering crowd during a surprise late-night tour of Singapore on the eve of his summit with U.S. President Donald Trump. Photographer: SeongJoon Cho/Bloomberg via Getty Images
U.S. President Donald Trump is pictured during a meeting at the Istana in Singapore June 11, 2018. REUTERS/Jonathan Ernst
North Korea's leader Kim Jong Un (L) poses with US President Donald Trump (R) after taking part in a signing ceremony at the end of their historic US-North Korea summit, at the Capella Hotel on Sentosa island in Singapore on June 12, 2018. - Donald Trump and Kim Jong Un became on June 12 the first sitting US and North Korean leaders to meet, shake hands and negotiate to end a decades-old nuclear stand-off. (Photo by Anthony WALLACE / POOL / AFP) (Photo credit should read ANTHONY WALLACE/AFP/Getty Images)
US President Donald Trump holds up a document signed by him and North Korea's leader Kim Jong Un following a signing ceremony during their historic US-North Korea summit, at the Capella Hotel on Sentosa island in Singapore on June 12, 2018. - Donald Trump and Kim Jong Un became on June 12 the first sitting US and North Korean leaders to meet, shake hands and negotiate to end a decades-old nuclear stand-off. (Photo by SAUL LOEB / AFP) (Photo credit should read SAUL LOEB/AFP/Getty Images)
SINGAPORE - 2018/06/11: President Trump leaves the Sinagpore Istana after meeting with with Singaporean PM Lee Heisn Loong ahead of Trump-Kim Summit. The historic meeting between U.S. President Donald Trump and North Korean leader Kim Jong-un has been scheduled for June 12 in Singapore as both leaders arrived in the Southeast Asian city-state on Sunday ahead of the landmark summit. (Photo by Sion Ang/SOPA Images/LightRocket via Getty Images)
North Korea's leader Kim Jong Un (L) shakes hands with US President Donald Trump (R) at the start of their historic US-North Korea summit, at the Capella Hotel on Sentosa island in Singapore on June 12, 2018. - Donald Trump and Kim Jong Un have become on June 12 the first sitting US and North Korean leaders to meet, shake hands and negotiate to end a decades-old nuclear stand-off. (Photo by SAUL LOEB / AFP) (Photo credit should read SAUL LOEB/AFP/Getty Images)
Supreme Leader of North Korea, Kim Jong Un (3rd from left) leaves the Singapore's Gardens by the Bay, Marina Bay Sands on night before summit on June 11, 2018 in Singapore. (Photo by Chris Jung/NurPhoto via Getty Images)
North Korea's leader Kim Jong Un (R) walks with US President Donald Trump (L) during a break in talks at their historic US-North Korea summit, at the Capella Hotel on Sentosa island in Singapore on June 12, 2018. - Donald Trump and Kim Jong Un became on June 12 the first sitting US and North Korean leaders to meet, shake hands and negotiate to end a decades-old nuclear stand-off. (Photo by Anthony WALLACE / POOL / AFP) (Photo credit should read ANTHONY WALLACE/AFP/Getty Images)
SINGAPORE - JUNE 11: North Korean leader Kim Jong-un (C) walks along the Jubilee bridge during a tour of some of the sights on June 11, 2018 in Singapore. The historic meeting between U.S. President Donald Trump and North Korean leader Kim Jong-un has been scheduled in Singapore for June 12 as a small circle of experts have already been involved in talks towards the landmark summit in the city-state. (Photo by Chris McGrath/Getty Images)
People watch a television screen showing live footage of the summit between US President Donald Trump and North Korean leader Kim Jong Un in Singapore, at a railway station in Seoul on June 12, 2018. (Photo by Jung Yeon-je / AFP) (Photo credit should read JUNG YEON-JE/AFP/Getty Images)
SINGAPORE - JUNE 11: U.S. Secretary of State Mike Pompeo answers questions at a press briefing June 11, 2018 in Singapore. Pompeo answered a range of questions related primarily to the historic meeting between U.S. President Donald Trump and North Korean leader Kim Jong-un scheduled for tomorrow June 12 in Singapore. (Photo by Win McNamee/Getty Images)
SINGAPORE - JUNE 11: National Security Council press spokesman Robert Palladino (4th R) answers questions from reporters at the White House press filing center June 11, 2018 in Singapore. The historic meeting between U.S. President Donald Trump and North Korean leader Kim Jong-un has been scheduled for June 12 in Singapore as both leaders arrived in the Southeast Asian city-state on Sunday ahead of the landmark summit. (Photo by Win McNamee/Getty Images)
SINGAPORE - JUNE 11: (----EDITORIAL USE ONLY MANDATORY CREDIT - 'MINISTRY OF COMMUNICATIONS AND INFORMATION, REPUBLIC OF SINGAPORE / HANDOUT' - NO MARKETING NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTS----) U.S. President Donald Trump (L6) participates in a working luncheon hosted by Singapore's Prime Minister Lee Hsien Loong at the Istana, Singapore on June 11, 2018. Officials from both delegations also attended the luncheon. (Photo by Ministry of Communications and Information, Republic of Singapore / Handout/Anadolu Agency/Getty Images)
SINGAPORE, SINGAPORE - JUNE 11: In this handout provided by the Ministry of Communications and Information of Singapore, U.S. President Donald Trump (R) with Singapore's Prime Minister Lee Hsien Loong (L) on June 11, 2018 in Singapore, Singapore. The historic meeting between U.S. President Donald Trump and North Korean leader Kim Jong-un has been scheduled in Singapore for June 12 as the world awaits for the landmark summit in the Southeast Asian city-state. (Photo by Ministry of Communications and Information Singapore/via Getty Images)
US President Donald Trump (R) shakes hands with North Korea's leader Kim Jong Un (L) as they sit down for their historic US-North Korea summit, at the Capella Hotel on Sentosa island in Singapore on June 12, 2018. - Donald Trump and Kim Jong Un have become on June 12 the first sitting US and North Korean leaders to meet, shake hands and negotiate to end a decades-old nuclear stand-off. (Photo by SAUL LOEB / AFP) (Photo credit should read SAUL LOEB/AFP/Getty Images)
Armed police officers patrol outside JW Marriot South Beach Hotel, a Marriott Group property, in Singapore, on Monday, June 11, 2018. Trump�met Prime Minister�Lee�Hsien Loong�at the city-state's presidential palace for more than two hours Monday for discussions that were expected to include everything from summit preparations to the U.S.'s tariff threats. Photographer: SeongJoon Cho/Bloomberg via Getty Images
Bodyguards of North Korea's leader Kim Jong Un arrive at The Marina Bay Sands hotel in Singapore, June 11, 2018. REUTERS/Edgar Su TPX IMAGES OF THE DAY
Police officers walk around the perimeter of the Capella Hotel on Singapore's resort island of Sentosa, June 11, 2018. REUTERS/Kim Kyung-hoon
The motorcade transporting U.S. President Donald Trump leaves the Istana in Singapore June 11, 2018. REUTERS/Tyrone Siu
U.S. President Donald Trump and his delegation have lunch with Singapore's Prime Minister Lee Hsien Loong and officials at the Istana in Singapore June 11, 2018. REUTERS/Jonathan Ernst
The motorcade of North Korean leader Kim Jong Un travels towards Sentosa for his meeting with U.S. President Donald Trump, in Singapore June 12, 2018. REUTERS/Edgar Su TPX IMAGES OF THE DAY
Official cameramen follow the motorcade of North Korean leader Kim Jong Un travels towards Sentosa for his meeting with U.S. President Donald Trump, in Singapore June 12, 2018. REUTERS/Edgar Su
The motorcade of U.S. President Donald Trump travels towards Sentosa for his meeting with North Korean leader Kim Jong Un, in Singapore June 12, 2018. REUTERS/Feline Lim TPX IMAGES OF THE DAY
Police stand guard outside the Capella Hotel in Singapore, on Tuesday, June 12, 2018. President�Donald Trump�plans to shake hands and have lunch with North Korean leader�Kim Jong Un, kicking off a historic summit on Tuesday between two adversaries that only last year had seemed at the brink of nuclear war. Photographer: SeongJoon Cho/Bloomberg via Getty Images
People watch a television screen showing live footage of the summit between US President Donald Trump and North Korean leader Kim Jong Un in Singapore, at a railway station in Seoul on June 12, 2018. (Photo by Jung Yeon-je / AFP) (Photo credit should read JUNG YEON-JE/AFP/Getty Images)
People watch a television screen showing live footage of the summit between US President Donald Trump and North Korean leader Kim Jong Un in Singapore, at a railway station in Seoul on June 12, 2018. (Photo by Jung Yeon-je / AFP) (Photo credit should read JUNG YEON-JE/AFP/Getty Images)
SINGAPORE - JUNE 12: (----EDITORIAL USE ONLY MANDATORY CREDIT - 'MINISTRY OF COMMUNICATIONS AND INFORMATION, REPUBLIC OF SINGAPORE / HANDOUT' - NO MARKETING NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTS----) U.S. President Donald Trump (L) leaves after his meeting with North Korea's leader Kim Jong Un (not seen) as part of the US-North Korea summit in Sentosa island, on June 12, 2018 at Paya Lebar Air Base in Singapore. (Photo by Ministry of Communications and Information, Singapore / Handout/Anadolu Agency/Getty Images)
SINGAPORE - JUNE 12: (----EDITORIAL USE ONLY MANDATORY CREDIT - 'MINISTRY OF COMMUNICATIONS AND INFORMATION, REPUBLIC OF SINGAPORE / HANDOUT' - NO MARKETING NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTS----) U.S. President Donald Trump waves his hand as he leaves after his meeting with North Korea's leader Kim Jong Un (not seen) as part of the US-North Korea summit in Sentosa island, on June 12, 2018 at Paya Lebar Air Base in Singapore. (Photo by Ministry of Communications and Information, Singapore / Handout/Anadolu Agency/Getty Images)
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But security experts around the web warned that the fan might not just be a way to stay cool. It could be a trojan horse designed to steal data from any journalist who plugged the fan into their USB drive.

Anything that plugs into a USB port is potentially a way for an attacker to get malicious software onto your computer. It's how the notorious Stuxnet worm infected its targets, and many big companies worried about information security forbid their employees from plugging anything into a USB port.  

Twitter exploded with security experts telling journalists not to plug the fan in. It could install keylogger software, or hack their email, they warned: 

5 PHOTOS
Security experts react to USB fans given to journalists at Trump-Kim summit
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Security experts react to USB fans given to journalists at Trump-Kim summit
So, um, summit journalists. Do not plug this in. Do not keep it. Drop it in a public trash can or send it to your f… https://t.co/oHXv9fBIP8
A free USB fan for journalists covering talks in Singapore, how cool! (Because it’s impossible for USB devices to s… https://t.co/w7HRu0MTwa
tearing into potentially-bugged things is my jam. anyone I know in SG for summit get one they have not already thro… https://t.co/F8wXsh1ozJ
If you're thinking "I need to stay cool, I could use one of these," come talk to me. I'll kick you in the shin real… https://t.co/ROBk2ozdAa
This is a pretty obvious way to break into journalist's laptops. Hope you didn't bring your primary device. https://t.co/PFVApZ1cPJ
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North Korea has become a hacking superpower in recent years, according to The Wall Street Journal. The country has been linked to attacks like the "Wannacry" ransomware. But North Korea has denied responsibility for the fan, according to the BBC.

Of course, the USB fan could just be that — a way to stay cool at a hot summit. But it's probably not worth the risk to find out. 

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