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Analysis
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max time kernel
55s -
max time network
44s -
platform
windows10-2004_x64 -
resource
win10v2004-20240419-en -
resource tags
arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system -
submitted
27/04/2024, 02:25
Static task
static1
Behavioral task
behavioral1
Sample
2024-04-27_4c7d38c93eb3c020d71179e181754db2_bkransomware.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-04-27_4c7d38c93eb3c020d71179e181754db2_bkransomware.exe
Resource
win10v2004-20240419-en
General
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Target
2024-04-27_4c7d38c93eb3c020d71179e181754db2_bkransomware.exe
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Size
96KB
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MD5
4c7d38c93eb3c020d71179e181754db2
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SHA1
b5eba26d8a8b5f94deb16e01cb593860e3fac1b1
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SHA256
3bf46103a7fffa809235aa999a497c12c11f0b198237216999198c13743c4efd
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SHA512
56d1e429f8a982910b519bfd758b9fea1aa2fc9230208518dde949e2d3cd4dcbe78830869ed5558eb2cc69ab30325104b6ad992c52dd21ae06da59f886c39603
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SSDEEP
1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazT3lEFGg3YZSCCbVa:ZRpAyazIliazTVEFGgoZfCbQ
Malware Config
Signatures
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Executes dropped EXE 2 IoCs
pid Process 932 xMu4oNIgGBQQUDm.exe 4592 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" 2024-04-27_4c7d38c93eb3c020d71179e181754db2_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 2024-04-27_4c7d38c93eb3c020d71179e181754db2_bkransomware.exe File created C:\Windows\CTS.exe CTS.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 1576 2024-04-27_4c7d38c93eb3c020d71179e181754db2_bkransomware.exe Token: SeDebugPrivilege 4592 CTS.exe -
Suspicious use of WriteProcessMemory 5 IoCs
description pid Process procid_target PID 1576 wrote to memory of 932 1576 2024-04-27_4c7d38c93eb3c020d71179e181754db2_bkransomware.exe 85 PID 1576 wrote to memory of 932 1576 2024-04-27_4c7d38c93eb3c020d71179e181754db2_bkransomware.exe 85 PID 1576 wrote to memory of 4592 1576 2024-04-27_4c7d38c93eb3c020d71179e181754db2_bkransomware.exe 87 PID 1576 wrote to memory of 4592 1576 2024-04-27_4c7d38c93eb3c020d71179e181754db2_bkransomware.exe 87 PID 1576 wrote to memory of 4592 1576 2024-04-27_4c7d38c93eb3c020d71179e181754db2_bkransomware.exe 87
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-04-27_4c7d38c93eb3c020d71179e181754db2_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-04-27_4c7d38c93eb3c020d71179e181754db2_bkransomware.exe"1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1576 -
C:\Users\Admin\AppData\Local\Temp\xMu4oNIgGBQQUDm.exeC:\Users\Admin\AppData\Local\Temp\xMu4oNIgGBQQUDm.exe2⤵
- Executes dropped EXE
PID:932
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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:4592
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
395KB
MD54afc3f86653225d5b80a771acaded4a0
SHA1ca46447164bff29594494dec898741a95c6b27bc
SHA256068e86044595ec6e334daf648acc802e6d8e8586cab6131154bb362c4441b79d
SHA5120b6df954e0ef0a79636a17e5aff984c9aa84b0ed9026ca54d9ba763005b9241e5cb5b3e8926e601aff8dcaa91e44f10f88089232782e742a4575843009f4a56d
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Filesize
25KB
MD5abbd49c180a2f8703f6306d6fa731fdc
SHA1d63f4bfe7f74936b2fbace803e3da6103fbf6586
SHA2565f411c0bd9ed9a42b0f07ed568c7d0cf358a83063b225a1f8f7da3296dde90f1
SHA512290dd984acc451b778f3db8c510bae7aec1d9547c3ad0a1829df731c136e4ecc9a37dc6a786cf8f1ecc4d14339aed1288af25055f450f6f953138c8d4d5c36e9
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Filesize
71KB
MD5f9d4ab0a726adc9b5e4b7d7b724912f1
SHA13d42ca2098475924f70ee4a831c4f003b4682328
SHA256b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc
SHA51222a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432