Analysis
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max time kernel
118s -
max time network
119s -
platform
windows7_x64 -
resource
win7-20240508-en -
resource tags
arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system -
submitted
11/06/2024, 18:03
Static task
static1
Behavioral task
behavioral1
Sample
2024-06-11_212cc02e286e8fb6cdb6b0f29ff9a729_bkransomware.exe
Resource
win7-20240508-en
Behavioral task
behavioral2
Sample
2024-06-11_212cc02e286e8fb6cdb6b0f29ff9a729_bkransomware.exe
Resource
win10v2004-20240508-en
General
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Target
2024-06-11_212cc02e286e8fb6cdb6b0f29ff9a729_bkransomware.exe
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Size
165KB
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MD5
212cc02e286e8fb6cdb6b0f29ff9a729
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SHA1
832e94d1fc29950d904dbac7aa8b4ce49007f6b1
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SHA256
ef1f172c0354bde12b7af5d2a3f38200d83418b511e791590d0a0ed28931f81d
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SHA512
da9f8861ea6d7ea6d4ad5dce6204c387086f3939bb30430d078286baa3f719da67e1bfa8cf84b9c3b867372829684c267e5b87b65eae2a31262d06c0bdd9146d
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SSDEEP
3072:ZhpAyazIlyazTRMxpIb1r22SnEAADF1ZVNJv5bj45Q3Jv:hZMaz6ad22BAuTZVNJpj45SJv
Malware Config
Signatures
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Executes dropped EXE 2 IoCs
pid Process 2992 NFVpTyMJr7QmrYa.exe 3020 CTS.exe -
Loads dropped DLL 1 IoCs
pid Process 2716 2024-06-11_212cc02e286e8fb6cdb6b0f29ff9a729_bkransomware.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_212cc02e286e8fb6cdb6b0f29ff9a729_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 CTS.exe File created C:\Windows\CTS.exe 2024-06-11_212cc02e286e8fb6cdb6b0f29ff9a729_bkransomware.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 2716 2024-06-11_212cc02e286e8fb6cdb6b0f29ff9a729_bkransomware.exe Token: SeDebugPrivilege 3020 CTS.exe -
Suspicious use of WriteProcessMemory 8 IoCs
description pid Process procid_target PID 2716 wrote to memory of 2992 2716 2024-06-11_212cc02e286e8fb6cdb6b0f29ff9a729_bkransomware.exe 28 PID 2716 wrote to memory of 2992 2716 2024-06-11_212cc02e286e8fb6cdb6b0f29ff9a729_bkransomware.exe 28 PID 2716 wrote to memory of 2992 2716 2024-06-11_212cc02e286e8fb6cdb6b0f29ff9a729_bkransomware.exe 28 PID 2716 wrote to memory of 2992 2716 2024-06-11_212cc02e286e8fb6cdb6b0f29ff9a729_bkransomware.exe 28 PID 2716 wrote to memory of 3020 2716 2024-06-11_212cc02e286e8fb6cdb6b0f29ff9a729_bkransomware.exe 30 PID 2716 wrote to memory of 3020 2716 2024-06-11_212cc02e286e8fb6cdb6b0f29ff9a729_bkransomware.exe 30 PID 2716 wrote to memory of 3020 2716 2024-06-11_212cc02e286e8fb6cdb6b0f29ff9a729_bkransomware.exe 30 PID 2716 wrote to memory of 3020 2716 2024-06-11_212cc02e286e8fb6cdb6b0f29ff9a729_bkransomware.exe 30
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-06-11_212cc02e286e8fb6cdb6b0f29ff9a729_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-11_212cc02e286e8fb6cdb6b0f29ff9a729_bkransomware.exe"1⤵
- Loads dropped DLL
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2716 -
C:\Users\Admin\AppData\Local\Temp\NFVpTyMJr7QmrYa.exeC:\Users\Admin\AppData\Local\Temp\NFVpTyMJr7QmrYa.exe2⤵
- Executes dropped EXE
PID:2992
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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:3020
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
71KB
MD566df4ffab62e674af2e75b163563fc0b
SHA1dec8a197312e41eeb3cfef01cb2a443f0205cd6e
SHA256075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163
SHA5121588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25
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Filesize
94KB
MD5ec5e7403f86990ab23caeeb4955f5ffb
SHA1c345479d6dc53a102ccb05259c0c858a1ddd7d8e
SHA256352df104254095ddf925514d99bfb5411c95b5386e90caf06557979f82e16844
SHA512679957452967a3d3f3f1c55a9a510befa2d31e3bdb825a76540e845667f61775f4d18c3b3493133dd671b380907aaae0dd380b95729a448acf48d95ca0fe5206