Analysis
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max time kernel
136s -
max time network
153s -
platform
windows7_x64 -
resource
win7-20220414-en -
submitted
26-06-2022 06:21
Static task
static1
Behavioral task
behavioral1
Sample
zxcvb.exe
Resource
win7-20220414-en
Behavioral task
behavioral2
Sample
zxcvb.exe
Resource
win10v2004-20220414-en
General
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Target
zxcvb.exe
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Size
768KB
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MD5
63645a9e1f5e77ba3c75366f3a14ab87
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SHA1
ed1497c47dc283118bbc57d49cd9f354785cf73d
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SHA256
2ced9b36b931b73b1d325bececd01f0e4fa6bd0fff98f8b76f2f45b473311cd0
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SHA512
4efce16194322c1288603ccd4ab6507fa5905debb137ce9b200e7a76e2c041c2d2aa720061b0679f2dfb5c21a668e12fe5eeb5fe99542f5a88d4bcdf103296f0
Malware Config
Extracted
recordbreaker
http://136.244.65.99/
http://140.82.52.55/
Signatures
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RecordBreaker
RecordBreaker is an information stealer capable of downloading and executing secondary payloads written in C++.
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Executes dropped EXE 1 IoCs
Processes:
Fvmidruhvvwkpvmfzdjkqkyhgrn.exepid process 1704 Fvmidruhvvwkpvmfzdjkqkyhgrn.exe -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
zxcvb.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Control Panel\International\Geo\Nation zxcvb.exe -
Loads dropped DLL 1 IoCs
Processes:
zxcvb.exepid process 1312 zxcvb.exe -
Suspicious use of SetThreadContext 1 IoCs
Processes:
zxcvb.exedescription pid process target process PID 1312 set thread context of 2036 1312 zxcvb.exe zxcvb.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Suspicious behavior: EnumeratesProcesses 2 IoCs
Processes:
powershell.exezxcvb.exepid process 1736 powershell.exe 1312 zxcvb.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
zxcvb.exepowershell.exedescription pid process Token: SeDebugPrivilege 1312 zxcvb.exe Token: SeDebugPrivilege 1736 powershell.exe -
Suspicious use of WriteProcessMemory 18 IoCs
Processes:
zxcvb.exedescription pid process target process PID 1312 wrote to memory of 1736 1312 zxcvb.exe powershell.exe PID 1312 wrote to memory of 1736 1312 zxcvb.exe powershell.exe PID 1312 wrote to memory of 1736 1312 zxcvb.exe powershell.exe PID 1312 wrote to memory of 1736 1312 zxcvb.exe powershell.exe PID 1312 wrote to memory of 1704 1312 zxcvb.exe Fvmidruhvvwkpvmfzdjkqkyhgrn.exe PID 1312 wrote to memory of 1704 1312 zxcvb.exe Fvmidruhvvwkpvmfzdjkqkyhgrn.exe PID 1312 wrote to memory of 1704 1312 zxcvb.exe Fvmidruhvvwkpvmfzdjkqkyhgrn.exe PID 1312 wrote to memory of 1704 1312 zxcvb.exe Fvmidruhvvwkpvmfzdjkqkyhgrn.exe PID 1312 wrote to memory of 2036 1312 zxcvb.exe zxcvb.exe PID 1312 wrote to memory of 2036 1312 zxcvb.exe zxcvb.exe PID 1312 wrote to memory of 2036 1312 zxcvb.exe zxcvb.exe PID 1312 wrote to memory of 2036 1312 zxcvb.exe zxcvb.exe PID 1312 wrote to memory of 2036 1312 zxcvb.exe zxcvb.exe PID 1312 wrote to memory of 2036 1312 zxcvb.exe zxcvb.exe PID 1312 wrote to memory of 2036 1312 zxcvb.exe zxcvb.exe PID 1312 wrote to memory of 2036 1312 zxcvb.exe zxcvb.exe PID 1312 wrote to memory of 2036 1312 zxcvb.exe zxcvb.exe PID 1312 wrote to memory of 2036 1312 zxcvb.exe zxcvb.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\zxcvb.exe"C:\Users\Admin\AppData\Local\Temp\zxcvb.exe"1⤵
- Checks computer location settings
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1312 -
C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -enc UwB0AGEAcgB0AC0AUwBsAGUAZQBwACAALQBTAGUAYwBvAG4AZABzACAAMQAwADsAIABTAGUAdAAtAE0AcABQAHIAZQBmAGUAcgBlAG4AYwBlACAALQBFAHgAYwBsAHUAcwBpAG8AbgBQAGEAdABoACAAJwBDADoAXAAnAA==2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1736 -
C:\Users\Admin\AppData\Local\Temp\Fvmidruhvvwkpvmfzdjkqkyhgrn.exe"C:\Users\Admin\AppData\Local\Temp\Fvmidruhvvwkpvmfzdjkqkyhgrn.exe"2⤵
- Executes dropped EXE
PID:1704 -
C:\Users\Admin\AppData\Local\Temp\zxcvb.exeC:\Users\Admin\AppData\Local\Temp\zxcvb.exe2⤵PID:2036
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
-
Filesize
21KB
MD5f35a031075f711d05262e547d028ae86
SHA19c9e3bdf907fcfa959910cd9c752e297765ccf80
SHA2563c0c5786499c54c8f99e689f7e1bfc129e4d10c3de58c7917fc73044e12346b9
SHA512ff5235e388cc82f45e2dda4e93b66f752789b6cda1b6a4076af0171ab88ea422e8309a0f85abfa2d2e8ed5a760c3d83c4ec13fea9b566c0dd470a5c64c1a8a30
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Filesize
21KB
MD5f35a031075f711d05262e547d028ae86
SHA19c9e3bdf907fcfa959910cd9c752e297765ccf80
SHA2563c0c5786499c54c8f99e689f7e1bfc129e4d10c3de58c7917fc73044e12346b9
SHA512ff5235e388cc82f45e2dda4e93b66f752789b6cda1b6a4076af0171ab88ea422e8309a0f85abfa2d2e8ed5a760c3d83c4ec13fea9b566c0dd470a5c64c1a8a30
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Filesize
21KB
MD5f35a031075f711d05262e547d028ae86
SHA19c9e3bdf907fcfa959910cd9c752e297765ccf80
SHA2563c0c5786499c54c8f99e689f7e1bfc129e4d10c3de58c7917fc73044e12346b9
SHA512ff5235e388cc82f45e2dda4e93b66f752789b6cda1b6a4076af0171ab88ea422e8309a0f85abfa2d2e8ed5a760c3d83c4ec13fea9b566c0dd470a5c64c1a8a30