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SAMSAM RANSOMWHERE WINDOWS
The earlier version of SamSam ransomware tries to delete all of the Windows shadow copies of user files before beginning to encrypt files.
SAMSAM RANSOMWHERE CODE
Loader code for SamSamįigure 1: Loader code for SamSam Hardcoded password and function call for decrypting SamSam ransomwareįigure 2: Hardcoded password and function call for decrypting SamSam ransomware The IV ensures distinct ciphertexts are produced, even when the same plaintext is encrypted multiple times, independently, with the same key.
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stubbin’ file from the current execution location, decrypts it with the key and initialization vector (IV) derived from the hardcoded password, and loads it. The loader is a very simple and small dotnet assembly which reads the ‘. This delivery format makes it nearly impossible for static detection mechanisms to detect the file. The latest variants of SamSam are distributed in at least two components – a loader and the actual SamSam ransomware, which is encrypted in a file with extension name ‘. The core file encryption routine hasn’t changed much though. Since its discovery, we have seen multiple variants of this ransomware that use different execution strategies and obfuscation techniques to conceal itself from AV and static analysis tools. The SamSam ransomware is a dotnet executable. and that’s before demanding $51,000 from the City of Atlanta last week. The total earning of the ransomware was estimated as nearly $850,000. And an unnamed ICS (Industrial Control Systems) company in the U.S.Cloud-based EHR (electronic health records) provider Allscripts.
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The municipality of Farmington, New Mexico.Adams Memorial Hospital in Decatur, Indiana.Previously, this ransomware has successfully targeted some high-profile victims, including several government, healthcare and ICS systems. SamSam was discovered in early 2016 and is believed to be spread through the Gold Lowell threat group. The strain of ransomware was determined to be Samas ransomware (also known as ‘SamSam’ or ‘Samsa’). The city email systems were not affected by the virus.On March 22, 2018, the City of Atlanta, Georgia was struck by a ransomware attack that crippled municipals systems and forced the city’s IT team to verify every machine’s integrity. The ransomware also did not breach any electric utility operations systems and there was not an interruption of public safety services. More: Farmington utility always on guard against cyberattackĪccording to a press release from the city, no customer or employee personal information was extracted and the public administration system was not affected. 3 by a variance of the SamSam ransomware. Many of the business operations computers were encrypted on Jan. Mayes said the city was able to recover the encrypted information without paying ransom. When people attempt to log on, they receive a message informing them that the files have been hijacked and they will have to pay to get them back.Ĭity Manager Rob Mayes said via text message that the FBI advised the city not to pay the 3 bitcoin - worth more than $35,000 - ransom that was demanded. The virus encrypts files on a computer network or locks down the entire system. FARMINGTON - The city of Farmington is returning to normal after a variant of the ransomware known as SamSam shut down the computer systems.