Analysis
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max time kernel
119s -
max time network
120s -
platform
windows7_x64 -
resource
win7-20231129-en -
resource tags
arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system -
submitted
24-05-2024 22:16
Static task
static1
Behavioral task
behavioral1
Sample
2024-05-24_e6c89aeab5a9ff4fef6497c5ddb3d23b_bkransomware.exe
Resource
win7-20231129-en
Behavioral task
behavioral2
Sample
2024-05-24_e6c89aeab5a9ff4fef6497c5ddb3d23b_bkransomware.exe
Resource
win10v2004-20240508-en
General
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Target
2024-05-24_e6c89aeab5a9ff4fef6497c5ddb3d23b_bkransomware.exe
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Size
71KB
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MD5
e6c89aeab5a9ff4fef6497c5ddb3d23b
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SHA1
a09b1e72ceae245e983e3c7dfc0eb59707d8c272
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SHA256
3727dfc70cce2050d9b5db1677571431c32b516851e1133df3aa5a0a4ad6e06e
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SHA512
984d8f7fb9219f5f0fbd5d1ba0ae3287833e676e41c2884b537099a050e06de279db3382865dcc0bf96f8017ef76bd4daef8b5c4defae6ec483c3174a55b7409
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SSDEEP
1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazT2p:ZRpAyazIliazTy
Malware Config
Signatures
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Executes dropped EXE 1 IoCs
Processes:
CTS.exepid process 2184 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:
2024-05-24_e6c89aeab5a9ff4fef6497c5ddb3d23b_bkransomware.exeCTS.exedescription ioc process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" 2024-05-24_e6c89aeab5a9ff4fef6497c5ddb3d23b_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:
2024-05-24_e6c89aeab5a9ff4fef6497c5ddb3d23b_bkransomware.exeCTS.exedescription ioc process File created C:\Windows\CTS.exe 2024-05-24_e6c89aeab5a9ff4fef6497c5ddb3d23b_bkransomware.exe File created C:\Windows\CTS.exe CTS.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
2024-05-24_e6c89aeab5a9ff4fef6497c5ddb3d23b_bkransomware.exeCTS.exedescription pid process Token: SeDebugPrivilege 2820 2024-05-24_e6c89aeab5a9ff4fef6497c5ddb3d23b_bkransomware.exe Token: SeDebugPrivilege 2184 CTS.exe -
Suspicious use of WriteProcessMemory 4 IoCs
Processes:
2024-05-24_e6c89aeab5a9ff4fef6497c5ddb3d23b_bkransomware.exedescription pid process target process PID 2820 wrote to memory of 2184 2820 2024-05-24_e6c89aeab5a9ff4fef6497c5ddb3d23b_bkransomware.exe CTS.exe PID 2820 wrote to memory of 2184 2820 2024-05-24_e6c89aeab5a9ff4fef6497c5ddb3d23b_bkransomware.exe CTS.exe PID 2820 wrote to memory of 2184 2820 2024-05-24_e6c89aeab5a9ff4fef6497c5ddb3d23b_bkransomware.exe CTS.exe PID 2820 wrote to memory of 2184 2820 2024-05-24_e6c89aeab5a9ff4fef6497c5ddb3d23b_bkransomware.exe CTS.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-24_e6c89aeab5a9ff4fef6497c5ddb3d23b_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-24_e6c89aeab5a9ff4fef6497c5ddb3d23b_bkransomware.exe"1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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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
Network
MITRE ATT&CK Matrix ATT&CK v13
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Local\Temp\1GrstDD6ToODjpD.exeFilesize
71KB
MD535770ab8f3e7c61c8fca771e6cbc45f9
SHA1a6a066831186a1d0ac7e20a03187d5baec454999
SHA256587d12445203feb1cb4b9e0fb6de2bc896245b2d3515d01f3da91d705f61686e
SHA5123405d69bad912cdffec577ade2917353e26f6f4424e70161275303a51d609df52ba081499504f1f65d392be48ac02ee5df05b02cb5969dd578823894fd1b8805
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C:\Windows\CTS.exeFilesize
71KB
MD5f9d4ab0a726adc9b5e4b7d7b724912f1
SHA13d42ca2098475924f70ee4a831c4f003b4682328
SHA256b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc
SHA51222a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432