Analysis
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max time kernel
132s -
max time network
124s -
platform
windows10-2004_x64 -
resource
win10v2004-20240508-en -
resource tags
arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-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 3636 3wBzXXGCl91qnQC.exe 1220 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
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 1328 2024-05-26_8ea90cd710a570f5d3c737e1113156c6_bkransomware.exe Token: SeDebugPrivilege 1220 CTS.exe -
Suspicious use of WriteProcessMemory 5 IoCs
description pid Process procid_target PID 1328 wrote to memory of 3636 1328 2024-05-26_8ea90cd710a570f5d3c737e1113156c6_bkransomware.exe 83 PID 1328 wrote to memory of 3636 1328 2024-05-26_8ea90cd710a570f5d3c737e1113156c6_bkransomware.exe 83 PID 1328 wrote to memory of 1220 1328 2024-05-26_8ea90cd710a570f5d3c737e1113156c6_bkransomware.exe 84 PID 1328 wrote to memory of 1220 1328 2024-05-26_8ea90cd710a570f5d3c737e1113156c6_bkransomware.exe 84 PID 1328 wrote to memory of 1220 1328 2024-05-26_8ea90cd710a570f5d3c737e1113156c6_bkransomware.exe 84
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⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1328 -
C:\Users\Admin\AppData\Local\Temp\3wBzXXGCl91qnQC.exeC:\Users\Admin\AppData\Local\Temp\3wBzXXGCl91qnQC.exe2⤵
- Executes dropped EXE
PID:3636
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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:1220
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
392KB
MD53e4d98460774bd53a9eaa1f6af10b66e
SHA17e15bf407bf7f3149e0b692a31a0744c5b6607c4
SHA256f0282689ac56081c789bed84fdb05ab75d50549f20a122b2aa669a2313cca57a
SHA5120860f06d45b398cfbafca7c1fe07707eb8adacc735d67a4958936b526aed052b8526b8478fb8d44c1f8ca96644baba7fedcb1719d8a93990dfabf74c67eed0d9
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Filesize
170KB
MD5b5b3dd398fd7093bc948369d7f25829a
SHA162e6b25c5cbca56b5b8dde82fb66bac69932f859
SHA25688b594ed50f8a31d5be23cefcd8c191e8cbf853b253a4aa896c5eecc9bd5d0ba
SHA5126a0832f85cbab01d0691c5072861511c2bedc6d840bbfd02ae95d12d1d550ad5746f2ea0d91f2eaeedce37806a521694e94eea3b75ba44b2a3cc221c4c96d699
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Filesize
99KB
MD5af88cab288e8213a11a7ea5313363d31
SHA1cb769e3246d5244a0040621e919f7c519ba49986
SHA2567407fac6e170430f34322202b73aa392431b5c2c49e15304fb255bb24c540366
SHA512a4e353fcb78579345d4c5bc1f48970b473e0499dfe5bc6abeffb669295fa2940ce8637045a11f881fe88dd9b97d380ae9a8eed1b94fbd47181e0b4eb427e9679
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Filesize
71KB
MD5f9d4ab0a726adc9b5e4b7d7b724912f1
SHA13d42ca2098475924f70ee4a831c4f003b4682328
SHA256b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc
SHA51222a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432