Analysis
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max time kernel
121s -
max time network
121s -
platform
windows7_x64 -
resource
win7-20240508-en -
resource tags
arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system -
submitted
03-06-2024 08:37
Static task
static1
Behavioral task
behavioral1
Sample
2024-06-03_f262fcd17104f903e343fe739502f0d6_bkransomware.exe
Resource
win7-20240508-en
Behavioral task
behavioral2
Sample
2024-06-03_f262fcd17104f903e343fe739502f0d6_bkransomware.exe
Resource
win10v2004-20240426-en
General
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Target
2024-06-03_f262fcd17104f903e343fe739502f0d6_bkransomware.exe
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Size
72KB
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MD5
f262fcd17104f903e343fe739502f0d6
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SHA1
90f1aebffe5e3966a0ce94c9dc9ded1d9dcf8c61
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SHA256
620d13c4a73f2fef68c67391ab2cfa00dbe4443a673352df13cb265c2f00d5e1
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SHA512
7f6a336e3c62a59709f81e7ec39699086b514a493b1e51d00fc990459ce378e172de6bd7c98145e43a410ae963bd47ff4625ab0692aaf1fcee40c6db1658c531
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SSDEEP
1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazT6:ZRpAyazIliazT6
Malware Config
Signatures
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Executes dropped EXE 1 IoCs
Processes:
CTS.exepid process 2296 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:
CTS.exe2024-06-03_f262fcd17104f903e343fe739502f0d6_bkransomware.exedescription ioc process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" CTS.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" 2024-06-03_f262fcd17104f903e343fe739502f0d6_bkransomware.exe -
Drops file in Windows directory 2 IoCs
Processes:
2024-06-03_f262fcd17104f903e343fe739502f0d6_bkransomware.exeCTS.exedescription ioc process File created C:\Windows\CTS.exe 2024-06-03_f262fcd17104f903e343fe739502f0d6_bkransomware.exe File created C:\Windows\CTS.exe CTS.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
2024-06-03_f262fcd17104f903e343fe739502f0d6_bkransomware.exeCTS.exedescription pid process Token: SeDebugPrivilege 2428 2024-06-03_f262fcd17104f903e343fe739502f0d6_bkransomware.exe Token: SeDebugPrivilege 2296 CTS.exe -
Suspicious use of WriteProcessMemory 4 IoCs
Processes:
2024-06-03_f262fcd17104f903e343fe739502f0d6_bkransomware.exedescription pid process target process PID 2428 wrote to memory of 2296 2428 2024-06-03_f262fcd17104f903e343fe739502f0d6_bkransomware.exe CTS.exe PID 2428 wrote to memory of 2296 2428 2024-06-03_f262fcd17104f903e343fe739502f0d6_bkransomware.exe CTS.exe PID 2428 wrote to memory of 2296 2428 2024-06-03_f262fcd17104f903e343fe739502f0d6_bkransomware.exe CTS.exe PID 2428 wrote to memory of 2296 2428 2024-06-03_f262fcd17104f903e343fe739502f0d6_bkransomware.exe CTS.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-06-03_f262fcd17104f903e343fe739502f0d6_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-03_f262fcd17104f903e343fe739502f0d6_bkransomware.exe"1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2428 -
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:2296
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
72KB
MD5855f411fb454a585b04aadd1cdb5bdef
SHA1867a24728a654eaffd3c8faf4ebb1f8e1db62b7f
SHA2565edf2c5889fe3c968d6e1541221b34334495419b898677ab712ce2ee19184d2a
SHA51228a0289d3e2f0921a43b14447098f30ddbb6d5f255e25ae71fcd5438adeb219021a627ec4e2d70a853baab22b2781ba9bfca941a2833f8c008a5e490cbd874fd
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Filesize
71KB
MD5f9d4ab0a726adc9b5e4b7d7b724912f1
SHA13d42ca2098475924f70ee4a831c4f003b4682328
SHA256b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc
SHA51222a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432