Analysis
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max time kernel
118s -
max time network
119s -
platform
windows7_x64 -
resource
win7-20240903-en -
resource tags
arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system -
submitted
12-10-2024 08:45
Static task
static1
Behavioral task
behavioral1
Sample
2024-10-12_821faf420d3771fa5fb903b5b031c555_bkransomware.exe
Resource
win7-20240903-en
Behavioral task
behavioral2
Sample
2024-10-12_821faf420d3771fa5fb903b5b031c555_bkransomware.exe
Resource
win10v2004-20241007-en
General
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Target
2024-10-12_821faf420d3771fa5fb903b5b031c555_bkransomware.exe
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Size
595KB
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MD5
821faf420d3771fa5fb903b5b031c555
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SHA1
dcd2ecf229422b35e11abecc0e018b8d829babb8
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SHA256
cfc2df936823bb9fa8fd06c4bb02a00b23bfcb91ffa37193420f0025cefa4ae4
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SHA512
f1853602df5eb5b21f6af200ef3e4b0c650c270eed708c710b30f24fe73fc34b74950b181cf741c3c666a6410b08e6801995ed2d044c9a5e1e5c77056f1a5828
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SSDEEP
12288:hS0OWhYsioAunt7539x8edAi69+fTIQfhMgoR3Ptf1NlDT4HmPathKWUr7rwf:DOOYPop753r8edt69+f5gf1Nx4GiWWUE
Malware Config
Signatures
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Executes dropped EXE 2 IoCs
pid Process 936 IUBQLPsL29s6UaH.exe 588 CTS.exe -
Loads dropped DLL 2 IoCs
pid Process 2124 2024-10-12_821faf420d3771fa5fb903b5b031c555_bkransomware.exe 1256 Process not Found -
Reads user/profile data of web browsers 3 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" 2024-10-12_821faf420d3771fa5fb903b5b031c555_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 2024-10-12_821faf420d3771fa5fb903b5b031c555_bkransomware.exe File created C:\Windows\CTS.exe CTS.exe -
System Location Discovery: System Language Discovery 1 TTPs 1 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
description ioc Process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language 2024-10-12_821faf420d3771fa5fb903b5b031c555_bkransomware.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 2124 2024-10-12_821faf420d3771fa5fb903b5b031c555_bkransomware.exe Token: SeDebugPrivilege 588 CTS.exe -
Suspicious use of WriteProcessMemory 8 IoCs
description pid Process procid_target PID 2124 wrote to memory of 936 2124 2024-10-12_821faf420d3771fa5fb903b5b031c555_bkransomware.exe 31 PID 2124 wrote to memory of 936 2124 2024-10-12_821faf420d3771fa5fb903b5b031c555_bkransomware.exe 31 PID 2124 wrote to memory of 936 2124 2024-10-12_821faf420d3771fa5fb903b5b031c555_bkransomware.exe 31 PID 2124 wrote to memory of 936 2124 2024-10-12_821faf420d3771fa5fb903b5b031c555_bkransomware.exe 31 PID 2124 wrote to memory of 588 2124 2024-10-12_821faf420d3771fa5fb903b5b031c555_bkransomware.exe 32 PID 2124 wrote to memory of 588 2124 2024-10-12_821faf420d3771fa5fb903b5b031c555_bkransomware.exe 32 PID 2124 wrote to memory of 588 2124 2024-10-12_821faf420d3771fa5fb903b5b031c555_bkransomware.exe 32 PID 2124 wrote to memory of 588 2124 2024-10-12_821faf420d3771fa5fb903b5b031c555_bkransomware.exe 32
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-10-12_821faf420d3771fa5fb903b5b031c555_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-10-12_821faf420d3771fa5fb903b5b031c555_bkransomware.exe"1⤵
- Loads dropped DLL
- Adds Run key to start application
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2124 -
C:\Users\Admin\AppData\Local\Temp\IUBQLPsL29s6UaH.exeC:\Users\Admin\AppData\Local\Temp\IUBQLPsL29s6UaH.exe2⤵
- Executes dropped EXE
PID:936
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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:588
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
595KB
MD5fdec431048154ca62a2c7ee7e636ed1f
SHA18f39455e06272ee3ca1449c27cb3a12c73a9bde0
SHA2561d6bb6b71f074665a90c0bd8db05bd68d9b30fa96be08b2cff9cde88f2573543
SHA5127da71f2bf951af6d372e862f16d3a42572b8dc2987809d61faa02afaab3fb731eb899ab3bb8284273b9f38faf141132e56c19e4b48b4e851028565f107986e09
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Filesize
71KB
MD566df4ffab62e674af2e75b163563fc0b
SHA1dec8a197312e41eeb3cfef01cb2a443f0205cd6e
SHA256075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163
SHA5121588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25
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Filesize
524KB
MD5645d5875c0ce2052d93943c62238a06e
SHA138c00dfaa6e0192e1157212d5baf42a8db869776
SHA25666ef54018ef1207394bef76bcb0411f2fbbedd6230a812026bf8f1710218dbf9
SHA512eb9654b527ddc15fae042ef6fa6b8a25f76c2fc21314abd1d629bac5066cfa11d9f3c1191150dc7784b20e5e47c4855ab97d34fadf904989a7a43ccd626949fe