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Analysis
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max time kernel
92s -
max time network
155s -
platform
windows10-2004_x64 -
resource
win10v2004-20220812-en -
resource tags
arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system -
submitted
01/12/2022, 18:30
Behavioral task
behavioral1
Sample
be843daa5e4298cfc7ac629d7928ec3b43d61230be57aa99b5a7c63f30e4f8f0.exe
Resource
win7-20221111-en
Behavioral task
behavioral2
Sample
be843daa5e4298cfc7ac629d7928ec3b43d61230be57aa99b5a7c63f30e4f8f0.exe
Resource
win10v2004-20220812-en
General
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Target
be843daa5e4298cfc7ac629d7928ec3b43d61230be57aa99b5a7c63f30e4f8f0.exe
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Size
929KB
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MD5
dff3eacc5af287364c9f7c2d1db6d6eb
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SHA1
612abe186dd2cd2d039fc14b2719b9bb272b5f26
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SHA256
be843daa5e4298cfc7ac629d7928ec3b43d61230be57aa99b5a7c63f30e4f8f0
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SHA512
e924ed0c80ab595f054ac34d28aebf0ebf4a0ec90daa003a894830d5931824b67a842881fa25a39c8e8dc160a5c984af0afba7bb5e40200a4fb0708bcb7fa25e
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SSDEEP
24576:lslXB0Eo/M+teLfBoioRipU7RPHGxqfS7bWCg6+v7O9hQA4Er:OlVQAfBwioOESmCg6+jO9uv4
Malware Config
Signatures
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Executes dropped EXE 1 IoCs
pid Process 4968 aav.exe -
resource yara_rule behavioral2/memory/2180-132-0x0000000000400000-0x000000000042F000-memory.dmp upx behavioral2/memory/2180-138-0x0000000000400000-0x000000000042F000-memory.dmp upx -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\Control Panel\International\Geo\Nation be843daa5e4298cfc7ac629d7928ec3b43d61230be57aa99b5a7c63f30e4f8f0.exe -
Drops file in Program Files directory 12 IoCs
description ioc Process File created C:\Program Files (x86)\AAV\aav.ooo be843daa5e4298cfc7ac629d7928ec3b43d61230be57aa99b5a7c63f30e4f8f0.exe File opened for modification C:\Program Files (x86)\AAV\aav.ooo be843daa5e4298cfc7ac629d7928ec3b43d61230be57aa99b5a7c63f30e4f8f0.exe File created C:\Program Files (x86)\AAV\aav0.dat be843daa5e4298cfc7ac629d7928ec3b43d61230be57aa99b5a7c63f30e4f8f0.exe File opened for modification C:\Program Files (x86)\AAV\aav0.dat be843daa5e4298cfc7ac629d7928ec3b43d61230be57aa99b5a7c63f30e4f8f0.exe File created C:\Program Files (x86)\AAV\aav1.dat be843daa5e4298cfc7ac629d7928ec3b43d61230be57aa99b5a7c63f30e4f8f0.exe File created C:\Program Files (x86)\AAV\aav.exe be843daa5e4298cfc7ac629d7928ec3b43d61230be57aa99b5a7c63f30e4f8f0.exe File opened for modification C:\Program Files (x86)\AAV\aav.exe be843daa5e4298cfc7ac629d7928ec3b43d61230be57aa99b5a7c63f30e4f8f0.exe File opened for modification C:\Program Files (x86)\AAV be843daa5e4298cfc7ac629d7928ec3b43d61230be57aa99b5a7c63f30e4f8f0.exe File created C:\Program Files (x86)\AAV\__tmp_rar_sfx_access_check_240572406 be843daa5e4298cfc7ac629d7928ec3b43d61230be57aa99b5a7c63f30e4f8f0.exe File opened for modification C:\Program Files (x86)\AAV\aav1.dat be843daa5e4298cfc7ac629d7928ec3b43d61230be57aa99b5a7c63f30e4f8f0.exe File created C:\Program Files (x86)\AAV\aav.cpl be843daa5e4298cfc7ac629d7928ec3b43d61230be57aa99b5a7c63f30e4f8f0.exe File opened for modification C:\Program Files (x86)\AAV\aav.cpl be843daa5e4298cfc7ac629d7928ec3b43d61230be57aa99b5a7c63f30e4f8f0.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Program crash 2 IoCs
pid pid_target Process procid_target 3524 4968 WerFault.exe 80 220 4968 WerFault.exe 80 -
Modifies registry class 3 IoCs
description ioc Process Key created \REGISTRY\MACHINE\SOFTWARE\Classes\.key aav.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\.key\ aav.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\.key\ = "regfile" aav.exe -
Suspicious use of WriteProcessMemory 3 IoCs
description pid Process procid_target PID 2180 wrote to memory of 4968 2180 be843daa5e4298cfc7ac629d7928ec3b43d61230be57aa99b5a7c63f30e4f8f0.exe 80 PID 2180 wrote to memory of 4968 2180 be843daa5e4298cfc7ac629d7928ec3b43d61230be57aa99b5a7c63f30e4f8f0.exe 80 PID 2180 wrote to memory of 4968 2180 be843daa5e4298cfc7ac629d7928ec3b43d61230be57aa99b5a7c63f30e4f8f0.exe 80
Processes
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C:\Users\Admin\AppData\Local\Temp\be843daa5e4298cfc7ac629d7928ec3b43d61230be57aa99b5a7c63f30e4f8f0.exe"C:\Users\Admin\AppData\Local\Temp\be843daa5e4298cfc7ac629d7928ec3b43d61230be57aa99b5a7c63f30e4f8f0.exe"1⤵
- Checks computer location settings
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
PID:2180 -
C:\Program Files (x86)\AAV\aav.exe"C:\Program Files (x86)\AAV\aav.exe"2⤵
- Executes dropped EXE
- Modifies registry class
PID:4968 -
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 4968 -s 5683⤵
- Program crash
PID:3524
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 4968 -s 5803⤵
- Program crash
PID:220
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 4968 -ip 49681⤵PID:2060
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 528 -p 4968 -ip 49681⤵PID:1780
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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Filesize
369KB
MD593604de2115a746daf98eeeb335aa19e
SHA197398c0d1d16eb98760f99fbd43a5d77c3dad565
SHA256891f2dbaa65221166f791b7c3a06432ab69098512941b0deeeebe9851a942fe3
SHA5125e0d6cfb9b8877c7feb2535c498ee6aa92c88906b586597b2fa0f6ce6e04e5721a9cd9ce802da211c45ce404ea15fece65292f979bd9dfc2d8712c20f708d722
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Filesize
369KB
MD593604de2115a746daf98eeeb335aa19e
SHA197398c0d1d16eb98760f99fbd43a5d77c3dad565
SHA256891f2dbaa65221166f791b7c3a06432ab69098512941b0deeeebe9851a942fe3
SHA5125e0d6cfb9b8877c7feb2535c498ee6aa92c88906b586597b2fa0f6ce6e04e5721a9cd9ce802da211c45ce404ea15fece65292f979bd9dfc2d8712c20f708d722