Analysis
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max time kernel
119s -
max time network
122s -
platform
windows7_x64 -
resource
win7-20240508-en -
resource tags
arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system -
submitted
27/05/2024, 14:39
Static task
static1
Behavioral task
behavioral1
Sample
2024-05-27_ea244df2ceec4693ddb3cab2824334aa_bkransomware.exe
Resource
win7-20240508-en
Behavioral task
behavioral2
Sample
2024-05-27_ea244df2ceec4693ddb3cab2824334aa_bkransomware.exe
Resource
win10v2004-20240508-en
General
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Target
2024-05-27_ea244df2ceec4693ddb3cab2824334aa_bkransomware.exe
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Size
214KB
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MD5
ea244df2ceec4693ddb3cab2824334aa
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SHA1
6bdc52f7bd23e31905149fedac31166c05e15a52
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SHA256
20385a70d740d5a8260450df7f5cc67d7f33cc04d1f58685949237233f47c1ab
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SHA512
827591a16355a29ed02d854eda56a2c6ce4d0f06032e1038b65f1101ff9e05fc4e834d300adfbbb58484686c6caed2e92f342e7524d1da8e8e05d74b4fca2212
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SSDEEP
3072:ZRpAyazIliazTcYubxmW6OrYhmBC9IdlIWuazrA8aqcnPVJIqi65z9zVJwP:xZ8azoYKmOAmEuzspnPDIU95JA
Malware Config
Signatures
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Executes dropped EXE 2 IoCs
pid Process 1656 CTS.exe 2176 ehZzv3VlsBvGJ1P.exe -
Loads dropped DLL 1 IoCs
pid Process 2068 2024-05-27_ea244df2ceec4693ddb3cab2824334aa_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" 2024-05-27_ea244df2ceec4693ddb3cab2824334aa_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 2024-05-27_ea244df2ceec4693ddb3cab2824334aa_bkransomware.exe File created C:\Windows\CTS.exe CTS.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 2068 2024-05-27_ea244df2ceec4693ddb3cab2824334aa_bkransomware.exe Token: SeDebugPrivilege 1656 CTS.exe -
Suspicious use of WriteProcessMemory 8 IoCs
description pid Process procid_target PID 2068 wrote to memory of 2176 2068 2024-05-27_ea244df2ceec4693ddb3cab2824334aa_bkransomware.exe 28 PID 2068 wrote to memory of 2176 2068 2024-05-27_ea244df2ceec4693ddb3cab2824334aa_bkransomware.exe 28 PID 2068 wrote to memory of 2176 2068 2024-05-27_ea244df2ceec4693ddb3cab2824334aa_bkransomware.exe 28 PID 2068 wrote to memory of 2176 2068 2024-05-27_ea244df2ceec4693ddb3cab2824334aa_bkransomware.exe 28 PID 2068 wrote to memory of 1656 2068 2024-05-27_ea244df2ceec4693ddb3cab2824334aa_bkransomware.exe 29 PID 2068 wrote to memory of 1656 2068 2024-05-27_ea244df2ceec4693ddb3cab2824334aa_bkransomware.exe 29 PID 2068 wrote to memory of 1656 2068 2024-05-27_ea244df2ceec4693ddb3cab2824334aa_bkransomware.exe 29 PID 2068 wrote to memory of 1656 2068 2024-05-27_ea244df2ceec4693ddb3cab2824334aa_bkransomware.exe 29
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-27_ea244df2ceec4693ddb3cab2824334aa_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-27_ea244df2ceec4693ddb3cab2824334aa_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:2068 -
C:\Users\Admin\AppData\Local\Temp\ehZzv3VlsBvGJ1P.exeC:\Users\Admin\AppData\Local\Temp\ehZzv3VlsBvGJ1P.exe2⤵
- Executes dropped EXE
PID:2176
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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:1656
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
71KB
MD5f9d4ab0a726adc9b5e4b7d7b724912f1
SHA13d42ca2098475924f70ee4a831c4f003b4682328
SHA256b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc
SHA51222a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432
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Filesize
143KB
MD538f108cddb6619fba80f8382d5227ece
SHA112fd277bf756f22cfae3043900e4aff8b9f05ed9
SHA2568296fe257b8c34398e3f291764454ec3cd9cbe06d60989b632ef4ba6c73ae5dc
SHA5123db732c23f10122c78cffc6b6a5b11836ade1a23f5c6f9a192f2be2fa99c5bd7afb7a9e29c5d518a888cdd2091f9ac41b244214be226152830e96f5ec2cca424