Analysis
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max time kernel
119s -
max time network
119s -
platform
windows7_x64 -
resource
win7-20231129-en -
resource tags
arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system -
submitted
26/05/2024, 10:41
Static task
static1
Behavioral task
behavioral1
Sample
2024-05-26_8ea90cd710a570f5d3c737e1113156c6_bkransomware.exe
Resource
win7-20231129-en
Behavioral task
behavioral2
Sample
2024-05-26_8ea90cd710a570f5d3c737e1113156c6_bkransomware.exe
Resource
win10v2004-20240508-en
General
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Target
2024-05-26_8ea90cd710a570f5d3c737e1113156c6_bkransomware.exe
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Size
170KB
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MD5
8ea90cd710a570f5d3c737e1113156c6
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SHA1
3a69166056f787b3377d86773dc93234e8c9afb5
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SHA256
a84ddfc94e595d086ba20fcd54691695454f246a084e4a1d55dd67b33d3cf3d3
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SHA512
cd775fe137de0a10abf247b15b4e09fa2d0866ff26da1bd977004cb5ad3cc71317294243e630873c03a17882d2ecc7b4075857985b50e3fc78a6859d95bf0fc8
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SSDEEP
3072:ZRpAyazIliazTjbAbvejKQyaEnTSNG4gklU1iJ3hh/POyBP4D:xZ8azH2eDyammG4gbgJjXh4D
Malware Config
Signatures
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Executes dropped EXE 2 IoCs
pid Process 2388 3w5jv5J6HqYxnzp.exe 2176 CTS.exe -
Loads dropped DLL 1 IoCs
pid Process 1540 2024-05-26_8ea90cd710a570f5d3c737e1113156c6_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" 2024-05-26_8ea90cd710a570f5d3c737e1113156c6_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 2024-05-26_8ea90cd710a570f5d3c737e1113156c6_bkransomware.exe File created C:\Windows\CTS.exe CTS.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 1540 2024-05-26_8ea90cd710a570f5d3c737e1113156c6_bkransomware.exe Token: SeDebugPrivilege 2176 CTS.exe -
Suspicious use of WriteProcessMemory 8 IoCs
description pid Process procid_target PID 1540 wrote to memory of 2388 1540 2024-05-26_8ea90cd710a570f5d3c737e1113156c6_bkransomware.exe 28 PID 1540 wrote to memory of 2388 1540 2024-05-26_8ea90cd710a570f5d3c737e1113156c6_bkransomware.exe 28 PID 1540 wrote to memory of 2388 1540 2024-05-26_8ea90cd710a570f5d3c737e1113156c6_bkransomware.exe 28 PID 1540 wrote to memory of 2388 1540 2024-05-26_8ea90cd710a570f5d3c737e1113156c6_bkransomware.exe 28 PID 1540 wrote to memory of 2176 1540 2024-05-26_8ea90cd710a570f5d3c737e1113156c6_bkransomware.exe 29 PID 1540 wrote to memory of 2176 1540 2024-05-26_8ea90cd710a570f5d3c737e1113156c6_bkransomware.exe 29 PID 1540 wrote to memory of 2176 1540 2024-05-26_8ea90cd710a570f5d3c737e1113156c6_bkransomware.exe 29 PID 1540 wrote to memory of 2176 1540 2024-05-26_8ea90cd710a570f5d3c737e1113156c6_bkransomware.exe 29
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-26_8ea90cd710a570f5d3c737e1113156c6_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-26_8ea90cd710a570f5d3c737e1113156c6_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:1540 -
C:\Users\Admin\AppData\Local\Temp\3w5jv5J6HqYxnzp.exeC:\Users\Admin\AppData\Local\Temp\3w5jv5J6HqYxnzp.exe2⤵
- Executes dropped EXE
PID:2388
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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:2176
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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
99KB
MD5af88cab288e8213a11a7ea5313363d31
SHA1cb769e3246d5244a0040621e919f7c519ba49986
SHA2567407fac6e170430f34322202b73aa392431b5c2c49e15304fb255bb24c540366
SHA512a4e353fcb78579345d4c5bc1f48970b473e0499dfe5bc6abeffb669295fa2940ce8637045a11f881fe88dd9b97d380ae9a8eed1b94fbd47181e0b4eb427e9679