General
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Target
b88fe97196d3ea799b1e708ab452e9a61f9380a8b27a82f03575f5f046b036d0.zip
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Size
482KB
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Sample
221115-gt3t9sfb74
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MD5
c43b82e2d1c2a6d96640349b0dc17d40
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SHA1
885645e937f663551e86ee32c4d690097ca6b352
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SHA256
7f5500562fc0e7350550841de9333f51b21c79e3a395558d397d356e1bb29f5e
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SHA512
7974ff94bb1913526b9f8e09e963a602c17468baef2f57568781f6fdc91462c911a06038caec4c467749dd41829b79123cb54518cc11679c2a4fc7d4e726d3c2
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SSDEEP
12288:/Q5RmMN62TCq3E3K4dPjIatZ68idn3m1gV:i6+CZzIazifV
Behavioral task
behavioral1
Sample
b88fe97196d3ea799b1e708ab452e9a61f9380a8b27a82f03575f5f046b036d0.exe
Resource
win7-20220812-en
Behavioral task
behavioral2
Sample
b88fe97196d3ea799b1e708ab452e9a61f9380a8b27a82f03575f5f046b036d0.exe
Resource
win10v2004-20220901-en
Malware Config
Extracted
C:\ProgramData\Service\SURTR_README.hta
surtr
Targets
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Target
b88fe97196d3ea799b1e708ab452e9a61f9380a8b27a82f03575f5f046b036d0.exe
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Size
1.1MB
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MD5
ffc6b559c24b8d82afcb5c01bb5619d9
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SHA1
8e068e9c486769716d9685f85687b531ab3a88cf
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SHA256
b88fe97196d3ea799b1e708ab452e9a61f9380a8b27a82f03575f5f046b036d0
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SHA512
48cf29ecbf184f9d96b9db95190657604c7fb9570046abbeba70d99c6748afbea5f698bb4bb91b1b9b3b3ab7abc56c36a3230aa20c58a99269fe0a4884522191
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SSDEEP
24576:NyBzKGHF0bxTCFvXwKk/aISpu4Qc6F3v1HT2BzN2tgGS3YzYho1yWEsWbj28Q5m:AV4xTCzu4Qc6/F8S8bzQ
Score10/10-
Deletes NTFS Change Journal
The USN change journal is a persistent log of all changes made to local files used by Windows Server systems.
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Detects Surtr Payload
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Modifies boot configuration data using bcdedit
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Disables Task Manager via registry modification
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Disables use of System Restore points
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Checks computer location settings
Looks up country code configured in the registry, likely geofence.
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Drops startup file
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Adds Run key to start application
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Drops desktop.ini file(s)
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Enumerates connected drives
Attempts to read the root path of hard drives other than the default C: drive.
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MITRE ATT&CK Enterprise v6
Persistence
Hidden Files and Directories
1Registry Run Keys / Startup Folder
1Scheduled Task
1Defense Evasion
Bypass User Account Control
1Disabling Security Tools
1File Deletion
3Hidden Files and Directories
1Modify Registry
2