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General
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Target
Trojan-Ransom.Win32.Blocker.hfjn-d905f9e538546cd60c495a8bc4345e1584328e3c5a4fedca2735aad6f0eacf07
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Size
280KB
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Sample
221106-2vyxxsegg7
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MD5
7ce7a3098963cd46086eef5d82d39d71
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SHA1
b2fc7d1b3a78fd5c420902d5af5e00467f0d25f5
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SHA256
d905f9e538546cd60c495a8bc4345e1584328e3c5a4fedca2735aad6f0eacf07
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SHA512
a804279b9b1c624d0b621649b78e0121ecac3f99fcc50dd71a6f472eea41fb2c16e064c1a698ad62b5549d953a52b4f6b44dc3be5a817dc0e402ec6559da057a
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SSDEEP
3072:WnYOsefAsRp0QvPm35OEJ0h0kUlznGOLNLki8+fYFHyF+mhetgTifPjHed/v:k0QG3PbkUlzvpAi5EyFLheiIgv
Static task
static1
Behavioral task
behavioral1
Sample
Trojan-Ransom.Win32.Blocker.exe
Resource
win7-20220901-en
Behavioral task
behavioral2
Sample
Trojan-Ransom.Win32.Blocker.exe
Resource
win10v2004-20220901-en
Malware Config
Targets
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Target
Trojan-Ransom.Win32.Blocker.hfjn-d905f9e538546cd60c495a8bc4345e1584328e3c5a4fedca2735aad6f0eacf07
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Size
280KB
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MD5
7ce7a3098963cd46086eef5d82d39d71
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SHA1
b2fc7d1b3a78fd5c420902d5af5e00467f0d25f5
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SHA256
d905f9e538546cd60c495a8bc4345e1584328e3c5a4fedca2735aad6f0eacf07
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SHA512
a804279b9b1c624d0b621649b78e0121ecac3f99fcc50dd71a6f472eea41fb2c16e064c1a698ad62b5549d953a52b4f6b44dc3be5a817dc0e402ec6559da057a
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SSDEEP
3072:WnYOsefAsRp0QvPm35OEJ0h0kUlznGOLNLki8+fYFHyF+mhetgTifPjHed/v:k0QG3PbkUlzvpAi5EyFLheiIgv
Score10/10-
Modifies firewall policy service
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Executes dropped EXE
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Checks computer location settings
Looks up country code configured in the registry, likely geofence.
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Loads dropped DLL
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Adds Run key to start application
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Modifies WinLogon
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Writes to the Master Boot Record (MBR)
Bootkits write to the MBR to gain persistence at a level below the operating system.
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Suspicious use of SetThreadContext
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