General
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Target
Muisvc(unpacked).exe
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Size
1.0MB
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Sample
211021-xg4h2abegm
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MD5
dee33a5b0f93ffbf6c5da9e376b89c9b
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SHA1
e5c0415345340ccec55c6e79503296a846db7a70
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SHA256
b654cc6156b8cb72642d97672847401552bf72b208d52047b2697612ef3107d1
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SHA512
9ff39cbd360eca2adafd44f60064da2b6d7e1961599ef28de97d0582725d02c4a81e6429e2a9d33f389d175fb12136d190fd4d2188a44d50d02b2f1fede241c8
Static task
static1
Behavioral task
behavioral1
Sample
Muisvc(unpacked).exe
Resource
win7-en-20211014
Behavioral task
behavioral2
Sample
Muisvc(unpacked).exe
Resource
win10-en-20210920
Malware Config
Extracted
C:\MSOCache\All Users\{90140000-0011-0000-0000-0000000FF1CE}-C\633754-readme.html
Extracted
C:\633754-readme.html
http://infernoyrxlapxaiq.onion
Targets
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Target
Muisvc(unpacked).exe
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Size
1.0MB
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MD5
dee33a5b0f93ffbf6c5da9e376b89c9b
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SHA1
e5c0415345340ccec55c6e79503296a846db7a70
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SHA256
b654cc6156b8cb72642d97672847401552bf72b208d52047b2697612ef3107d1
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SHA512
9ff39cbd360eca2adafd44f60064da2b6d7e1961599ef28de97d0582725d02c4a81e6429e2a9d33f389d175fb12136d190fd4d2188a44d50d02b2f1fede241c8
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Avaddon
Ransomware-as-a-service first released in June 2020 and currently expanding its userbase among criminal actors.
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suricata: ET MALWARE Win32/Avaddon Ransomware Style External IP Address Check
suricata: ET MALWARE Win32/Avaddon Ransomware Style External IP Address Check
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Modifies extensions of user files
Ransomware generally changes the extension on encrypted files.
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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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Looks up external IP address via web service
Uses a legitimate IP lookup service to find the infected system's external IP.
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