Analysis
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max time kernel
133s -
max time network
102s -
platform
windows10-2004_x64 -
resource
win10v2004-20240508-en -
resource tags
arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system -
submitted
24-05-2024 22:07
Static task
static1
Behavioral task
behavioral1
Sample
2024-05-24_3ed11020ec1280c52e117cc8825bd657_bkransomware.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-05-24_3ed11020ec1280c52e117cc8825bd657_bkransomware.exe
Resource
win10v2004-20240508-en
General
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Target
2024-05-24_3ed11020ec1280c52e117cc8825bd657_bkransomware.exe
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Size
214KB
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MD5
3ed11020ec1280c52e117cc8825bd657
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SHA1
a1e990e446a1577fecc78f538c4f761595ce0f9b
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SHA256
e4cca1e18fcf1fa19bf4b94de5009623d79fa6f95b69d7793b75a3bb48736d0b
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SHA512
c6799f462be85c142673257b61e5f229657fb69c13169c15754a8f3c0e1942674cc00ccf99af7148a94269d556b10deb2bcd93e3a07cb486bfe4879653c8234a
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SSDEEP
3072:ZRpAyazIliazTeQR3FIqsh7en+auokyjlOzryoei3ls5PEUDQ9h83fKXy7A:xZ8azqJqshC+gh2yi3ls5sUDQ9h8CXyM
Malware Config
Signatures
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Executes dropped EXE 2 IoCs
Processes:
OXjsBbKcGrXLEje.exeCTS.exepid process 3884 OXjsBbKcGrXLEje.exe 4268 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_3ed11020ec1280c52e117cc8825bd657_bkransomware.exeCTS.exedescription ioc process Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" 2024-05-24_3ed11020ec1280c52e117cc8825bd657_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_3ed11020ec1280c52e117cc8825bd657_bkransomware.exeCTS.exedescription ioc process File created C:\Windows\CTS.exe 2024-05-24_3ed11020ec1280c52e117cc8825bd657_bkransomware.exe File created C:\Windows\CTS.exe CTS.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
2024-05-24_3ed11020ec1280c52e117cc8825bd657_bkransomware.exeCTS.exedescription pid process Token: SeDebugPrivilege 4592 2024-05-24_3ed11020ec1280c52e117cc8825bd657_bkransomware.exe Token: SeDebugPrivilege 4268 CTS.exe -
Suspicious use of WriteProcessMemory 5 IoCs
Processes:
2024-05-24_3ed11020ec1280c52e117cc8825bd657_bkransomware.exedescription pid process target process PID 4592 wrote to memory of 3884 4592 2024-05-24_3ed11020ec1280c52e117cc8825bd657_bkransomware.exe OXjsBbKcGrXLEje.exe PID 4592 wrote to memory of 3884 4592 2024-05-24_3ed11020ec1280c52e117cc8825bd657_bkransomware.exe OXjsBbKcGrXLEje.exe PID 4592 wrote to memory of 4268 4592 2024-05-24_3ed11020ec1280c52e117cc8825bd657_bkransomware.exe CTS.exe PID 4592 wrote to memory of 4268 4592 2024-05-24_3ed11020ec1280c52e117cc8825bd657_bkransomware.exe CTS.exe PID 4592 wrote to memory of 4268 4592 2024-05-24_3ed11020ec1280c52e117cc8825bd657_bkransomware.exe CTS.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-24_3ed11020ec1280c52e117cc8825bd657_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-24_3ed11020ec1280c52e117cc8825bd657_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:\Users\Admin\AppData\Local\Temp\OXjsBbKcGrXLEje.exeC:\Users\Admin\AppData\Local\Temp\OXjsBbKcGrXLEje.exe2⤵
- Executes dropped EXE
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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\Microsoft\Office\16.0\excel.exe_Rules.xmlFilesize
392KB
MD5b0baba83aaf5a19853017fcbd91bd975
SHA13c036fec5fa743e99249a4031d15105ab38dee1f
SHA256fe5f60a57b3c915d21c8463657d3d9aa9c462eec9f385236d72e4e86fb9969dd
SHA5122fa65c29d6b81bf460b085b0f6918cfd1fcab3b04f87fa2183002045a650056ae5b1cc09c2d9f26bd7a5987cf7e34b9c289e56ce0e9ce05a3b666e27c4753b04
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C:\Users\Admin\AppData\Local\Temp\OXjsBbKcGrXLEje.exeFilesize
143KB
MD538f108cddb6619fba80f8382d5227ece
SHA112fd277bf756f22cfae3043900e4aff8b9f05ed9
SHA2568296fe257b8c34398e3f291764454ec3cd9cbe06d60989b632ef4ba6c73ae5dc
SHA5123db732c23f10122c78cffc6b6a5b11836ade1a23f5c6f9a192f2be2fa99c5bd7afb7a9e29c5d518a888cdd2091f9ac41b244214be226152830e96f5ec2cca424
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C:\Windows\CTS.exeFilesize
71KB
MD5f9d4ab0a726adc9b5e4b7d7b724912f1
SHA13d42ca2098475924f70ee4a831c4f003b4682328
SHA256b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc
SHA51222a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432
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memory/3884-14-0x00007FF9D55F3000-0x00007FF9D55F5000-memory.dmpFilesize
8KB
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memory/3884-13-0x0000000000560000-0x0000000000588000-memory.dmpFilesize
160KB
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memory/3884-22-0x00007FF9D55F0000-0x00007FF9D60B1000-memory.dmpFilesize
10.8MB
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memory/3884-32-0x00007FF9D55F0000-0x00007FF9D60B1000-memory.dmpFilesize
10.8MB