Analysis
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max time kernel
122s -
max time network
123s -
platform
windows7_x64 -
resource
win7-20231129-en -
resource tags
arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system -
submitted
11/06/2024, 18:00
Static task
static1
Behavioral task
behavioral1
Sample
2024-06-11_88af66a07ddc2cdf772ce0806f196e0c_bkransomware.exe
Resource
win7-20231129-en
Behavioral task
behavioral2
Sample
2024-06-11_88af66a07ddc2cdf772ce0806f196e0c_bkransomware.exe
Resource
win10v2004-20240508-en
General
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Target
2024-06-11_88af66a07ddc2cdf772ce0806f196e0c_bkransomware.exe
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Size
71KB
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MD5
88af66a07ddc2cdf772ce0806f196e0c
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SHA1
50f217752cfd0ee87d3ea2a812ec482224e74bde
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SHA256
877b7a3b09c2ac8be387e08e18e761a5ef77dfcf570ad8a742bb9f6b9cc5031e
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SHA512
388a8f2a9f6f82601f4f1e393953674acf40cb17662a9ad573cb05479ffba04a80e086e59a6df24eb474819967380714831e98f1ef67e32aae9de6203ab8c224
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SSDEEP
1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTO:ZhpAyazIlyazTO
Malware Config
Signatures
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Executes dropped EXE 1 IoCs
pid Process 1708 CTS.exe -
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
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Adds Run key to start application 2 TTPs 2 IoCs
description ioc Process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" 2024-06-11_88af66a07ddc2cdf772ce0806f196e0c_bkransomware.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" CTS.exe -
Drops file in Windows directory 2 IoCs
description ioc Process File created C:\Windows\CTS.exe 2024-06-11_88af66a07ddc2cdf772ce0806f196e0c_bkransomware.exe File created C:\Windows\CTS.exe CTS.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 3048 2024-06-11_88af66a07ddc2cdf772ce0806f196e0c_bkransomware.exe Token: SeDebugPrivilege 1708 CTS.exe -
Suspicious use of WriteProcessMemory 4 IoCs
description pid Process procid_target PID 3048 wrote to memory of 1708 3048 2024-06-11_88af66a07ddc2cdf772ce0806f196e0c_bkransomware.exe 28 PID 3048 wrote to memory of 1708 3048 2024-06-11_88af66a07ddc2cdf772ce0806f196e0c_bkransomware.exe 28 PID 3048 wrote to memory of 1708 3048 2024-06-11_88af66a07ddc2cdf772ce0806f196e0c_bkransomware.exe 28 PID 3048 wrote to memory of 1708 3048 2024-06-11_88af66a07ddc2cdf772ce0806f196e0c_bkransomware.exe 28
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-06-11_88af66a07ddc2cdf772ce0806f196e0c_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-11_88af66a07ddc2cdf772ce0806f196e0c_bkransomware.exe"1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3048 -
C:\Windows\CTS.exe"C:\Windows\CTS.exe"2⤵
- Executes dropped EXE
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
PID:1708
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
71KB
MD5b17237106e3e61287a8b931c53ad0b36
SHA1bf69f602c2d9fe7517d60338beccfdeb9cd82cf3
SHA256ad170810dc362014ac822986695143432b99a5a001711bc4466426f9b8288d6b
SHA51250fb40e96b1ad8ae349cf550d3bf5693c595081d6f22a27528845dcd3ff6051fe20ffaad04781edaf65a0b1b2c6a43af8b09c2e142e01325f088fa708126fe54
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Filesize
71KB
MD566df4ffab62e674af2e75b163563fc0b
SHA1dec8a197312e41eeb3cfef01cb2a443f0205cd6e
SHA256075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163
SHA5121588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25