Analysis
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max time kernel
118s -
max time network
119s -
platform
windows7_x64 -
resource
win7-20240221-en -
resource tags
arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system -
submitted
28-04-2024 19:27
Static task
static1
Behavioral task
behavioral1
Sample
2024-04-28_4749b11bca35a64b9a61ca4497bc20d9_bkransomware.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-04-28_4749b11bca35a64b9a61ca4497bc20d9_bkransomware.exe
Resource
win10v2004-20240426-en
General
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Target
2024-04-28_4749b11bca35a64b9a61ca4497bc20d9_bkransomware.exe
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Size
71KB
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MD5
4749b11bca35a64b9a61ca4497bc20d9
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SHA1
e1633a4305da4effd1743fc476c2a919322b80b1
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SHA256
60a22cf5d2bce6099d145d51db7a34c19d1513e9bd6de46170fd68839d0ef6b9
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SHA512
35250086c8c03f3576880cf05e9a99f68ed49bcc6a7392a3e8911090eb3880f34511b00c6620e27792f26006061c402d058c45ada05ab523202267c5823620a8
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SSDEEP
1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTZ:ZhpAyazIlyazTZ
Malware Config
Signatures
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Executes dropped EXE 1 IoCs
Processes:
CTS.exepid process 2316 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:
2024-04-28_4749b11bca35a64b9a61ca4497bc20d9_bkransomware.exeCTS.exedescription ioc process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" 2024-04-28_4749b11bca35a64b9a61ca4497bc20d9_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
Processes:
2024-04-28_4749b11bca35a64b9a61ca4497bc20d9_bkransomware.exeCTS.exedescription ioc process File created C:\Windows\CTS.exe 2024-04-28_4749b11bca35a64b9a61ca4497bc20d9_bkransomware.exe File created C:\Windows\CTS.exe CTS.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
2024-04-28_4749b11bca35a64b9a61ca4497bc20d9_bkransomware.exeCTS.exedescription pid process Token: SeDebugPrivilege 2084 2024-04-28_4749b11bca35a64b9a61ca4497bc20d9_bkransomware.exe Token: SeDebugPrivilege 2316 CTS.exe -
Suspicious use of WriteProcessMemory 4 IoCs
Processes:
2024-04-28_4749b11bca35a64b9a61ca4497bc20d9_bkransomware.exedescription pid process target process PID 2084 wrote to memory of 2316 2084 2024-04-28_4749b11bca35a64b9a61ca4497bc20d9_bkransomware.exe CTS.exe PID 2084 wrote to memory of 2316 2084 2024-04-28_4749b11bca35a64b9a61ca4497bc20d9_bkransomware.exe CTS.exe PID 2084 wrote to memory of 2316 2084 2024-04-28_4749b11bca35a64b9a61ca4497bc20d9_bkransomware.exe CTS.exe PID 2084 wrote to memory of 2316 2084 2024-04-28_4749b11bca35a64b9a61ca4497bc20d9_bkransomware.exe CTS.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-04-28_4749b11bca35a64b9a61ca4497bc20d9_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-04-28_4749b11bca35a64b9a61ca4497bc20d9_bkransomware.exe"1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2084 -
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:2316
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Local\Temp\DtH5zqzkPrnjej2.exeFilesize
71KB
MD5108a6e9bdb64ecfc2e3a2255cc23aef8
SHA14d7c60d0bdc5fa7593fe3792655c838e27033a04
SHA256a31ea3d32c663bccd98739aaf51b06cee40d4538ffcb88f91c8b1ecfa571c5c2
SHA5129ec020caadd353e0a21430797d71daa1838c7ee5b845ffe2a59fdab2534850a84d20a0d8dbf2e516188f431e7b1a06f5db5950e6decf96dde246440e9d4f870a
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C:\Windows\CTS.exeFilesize
71KB
MD566df4ffab62e674af2e75b163563fc0b
SHA1dec8a197312e41eeb3cfef01cb2a443f0205cd6e
SHA256075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163
SHA5121588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25