General
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Target
MSUpdate.bin.exe
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Size
360KB
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Sample
221118-s3lswshg29
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MD5
9ce01dfbf25dfea778e57d8274675d6f
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SHA1
1bd767beb5bc36b396ca6405748042640ad57526
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SHA256
5343947829609f69e84fe7e8172c38ee018ede3c9898d4895275f596ac54320d
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SHA512
d6ba89c1f221a94e3061bc4da896760d99935a7c766b8e4e30146266cf3356acd883835e75dbb86574bc869c83d381c8f63f23392101f6062bba4343af49978b
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SSDEEP
6144:4qZbqZToxIizLBZ6R56VkGM4ceLJ5vs5JGJceO/QCErIiuNAvwu:4qZb8oR3D6R5QHXZJy/Q50imAvB
Static task
static1
Behavioral task
behavioral1
Sample
MSUpdate.bin.exe
Resource
win7-20221111-en
Behavioral task
behavioral2
Sample
MSUpdate.bin.exe
Resource
win10v2004-20220812-en
Malware Config
Extracted
C:\$Recycle.Bin\S-1-5-21-3406023954-474543476-3319432036-1000\_RECOVERY_+qeplg.txt
teslacrypt
http://gwe32fdr74bhfsyujb34gfszfv.zatcurr.com/DC455AAC55F4AC90
http://tes543berda73i48fsdfsd.keratadze.at/DC455AAC55F4AC90
http://tt54rfdjhb34rfbnknaerg.milerteddy.com/DC455AAC55F4AC90
http://xlowfznrg4wf7dli.ONION/DC455AAC55F4AC90
Extracted
C:\Users\Admin\AppData\Roaming\Microsoft\SystemCertificates\My\Certificates\_RECOVERY_+qeplg.html
http://gwe32fdr74bhfsyujb34gfszfv.zatcurr.com/DC455AAC55F4AC90
http://tes543berda73i48fsdfsd.keratadze.at/DC455AAC55F4AC90
http://tt54rfdjhb34rfbnknaerg.milerteddy.com/DC455AAC55F4AC90
http://xlowfznrg4wf7dli.onion/DC455AAC55F4AC90
Extracted
C:\$Recycle.Bin\S-1-5-21-2295526160-1155304984-640977766-1000\_RECOVERY_+onpth.txt
teslacrypt
http://gwe32fdr74bhfsyujb34gfszfv.zatcurr.com/16FDEE301897FD4E
http://tes543berda73i48fsdfsd.keratadze.at/16FDEE301897FD4E
http://tt54rfdjhb34rfbnknaerg.milerteddy.com/16FDEE301897FD4E
http://xlowfznrg4wf7dli.ONION/16FDEE301897FD4E
Extracted
C:\Users\Admin\AppData\Roaming\Microsoft\SystemCertificates\My\Certificates\_RECOVERY_+onpth.html
http://gwe32fdr74bhfsyujb34gfszfv.zatcurr.com/16FDEE301897FD4E
http://tes543berda73i48fsdfsd.keratadze.at/16FDEE301897FD4E
http://tt54rfdjhb34rfbnknaerg.milerteddy.com/16FDEE301897FD4E
http://xlowfznrg4wf7dli.onion/16FDEE301897FD4E
Targets
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Target
MSUpdate.bin.exe
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Size
360KB
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MD5
9ce01dfbf25dfea778e57d8274675d6f
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SHA1
1bd767beb5bc36b396ca6405748042640ad57526
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SHA256
5343947829609f69e84fe7e8172c38ee018ede3c9898d4895275f596ac54320d
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SHA512
d6ba89c1f221a94e3061bc4da896760d99935a7c766b8e4e30146266cf3356acd883835e75dbb86574bc869c83d381c8f63f23392101f6062bba4343af49978b
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SSDEEP
6144:4qZbqZToxIizLBZ6R56VkGM4ceLJ5vs5JGJceO/QCErIiuNAvwu:4qZb8oR3D6R5QHXZJy/Q50imAvB
Score10/10-
TeslaCrypt, AlphaCrypt
Ransomware based on CryptoLocker. Shut down by the developers in 2016.
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Executes dropped EXE
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Modifies extensions of user files
Ransomware generally changes the extension on encrypted files.
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Checks computer location settings
Looks up country code configured in the registry, likely geofence.
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Deletes itself
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Drops startup file
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Adds Run key to start application
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