Analysis
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max time kernel
121s -
max time network
121s -
platform
windows7_x64 -
resource
win7-20240419-en -
resource tags
arch:x64arch:x86image:win7-20240419-enlocale:en-usos:windows7-x64system -
submitted
13-06-2024 00:25
Static task
static1
Behavioral task
behavioral1
Sample
2024-06-13_08096c6e58536c35881c54a6a74d9d0e_bkransomware.exe
Resource
win7-20240419-en
Behavioral task
behavioral2
Sample
2024-06-13_08096c6e58536c35881c54a6a74d9d0e_bkransomware.exe
Resource
win10v2004-20240226-en
General
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Target
2024-06-13_08096c6e58536c35881c54a6a74d9d0e_bkransomware.exe
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Size
71KB
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MD5
08096c6e58536c35881c54a6a74d9d0e
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SHA1
e4c9b48548a6d1c6f5a92d1586c6673f7e1f7327
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SHA256
bce278f72862767ae49e7493d789747dbc864156d92ebd681ad8828f1c9e9d13
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SHA512
42fdca3a6d38524b7f93e8aa75c5f2a6417b9ef825ec8f5af0e481854dd27d27e70d28c2cc2530f811f0d9d3032946410161d4154511797e54001d8ec5ce66a5
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SSDEEP
1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTP:ZhpAyazIlyazTP
Malware Config
Signatures
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Executes dropped EXE 1 IoCs
Processes:
CTS.exepid Process 2440 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
Processes:
2024-06-13_08096c6e58536c35881c54a6a74d9d0e_bkransomware.exeCTS.exedescription ioc Process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" 2024-06-13_08096c6e58536c35881c54a6a74d9d0e_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
Processes:
CTS.exe2024-06-13_08096c6e58536c35881c54a6a74d9d0e_bkransomware.exedescription ioc Process File created C:\Windows\CTS.exe CTS.exe File created C:\Windows\CTS.exe 2024-06-13_08096c6e58536c35881c54a6a74d9d0e_bkransomware.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
2024-06-13_08096c6e58536c35881c54a6a74d9d0e_bkransomware.exeCTS.exedescription pid Process Token: SeDebugPrivilege 2912 2024-06-13_08096c6e58536c35881c54a6a74d9d0e_bkransomware.exe Token: SeDebugPrivilege 2440 CTS.exe -
Suspicious use of WriteProcessMemory 4 IoCs
Processes:
2024-06-13_08096c6e58536c35881c54a6a74d9d0e_bkransomware.exedescription pid Process procid_target PID 2912 wrote to memory of 2440 2912 2024-06-13_08096c6e58536c35881c54a6a74d9d0e_bkransomware.exe 28 PID 2912 wrote to memory of 2440 2912 2024-06-13_08096c6e58536c35881c54a6a74d9d0e_bkransomware.exe 28 PID 2912 wrote to memory of 2440 2912 2024-06-13_08096c6e58536c35881c54a6a74d9d0e_bkransomware.exe 28 PID 2912 wrote to memory of 2440 2912 2024-06-13_08096c6e58536c35881c54a6a74d9d0e_bkransomware.exe 28
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-06-13_08096c6e58536c35881c54a6a74d9d0e_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-13_08096c6e58536c35881c54a6a74d9d0e_bkransomware.exe"1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2912 -
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:2440
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
71KB
MD5cbf08fcb16489bb8ae5127ade06ecefa
SHA19e9ace43d8280e90b0f897405e758fe6a56a1243
SHA256456fcef0f54577f87a58d7b7817e65dc12f805d4651514c0e274084dd1b827fc
SHA5125750d85bfe5b91d6dab0625a57de3e76a813ba3677a4fb0a292ee7a489ff081ac3c264f2a3e7c30c7324651e25a3e74b7b93ebe58df3fc45fa736b816346fc45
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Filesize
71KB
MD566df4ffab62e674af2e75b163563fc0b
SHA1dec8a197312e41eeb3cfef01cb2a443f0205cd6e
SHA256075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163
SHA5121588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25