Analysis
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max time kernel
121s -
max time network
122s -
platform
windows7_x64 -
resource
win7-20240215-en -
resource tags
arch:x64arch:x86image:win7-20240215-enlocale:en-usos:windows7-x64system -
submitted
23-05-2024 08:29
Static task
static1
Behavioral task
behavioral1
Sample
2024-05-23_22cf817b2e56d2407ebea36cbb151ce4_bkransomware.exe
Resource
win7-20240215-en
Behavioral task
behavioral2
Sample
2024-05-23_22cf817b2e56d2407ebea36cbb151ce4_bkransomware.exe
Resource
win10v2004-20240426-en
General
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Target
2024-05-23_22cf817b2e56d2407ebea36cbb151ce4_bkransomware.exe
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Size
172KB
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MD5
22cf817b2e56d2407ebea36cbb151ce4
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SHA1
ad341331ab6bd9b29fce272f6a6b0e960fbf0534
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SHA256
6d98eac96644e4fce11c830d90d215b3953ff38dec072892e5d0dd5b2f80c298
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SHA512
d9f945d0ab3c25cbb05c6d4950ab2f81bb0312bbfb21eaeb096a21dc8e556a6e771107293b40c8507124cd1f6489b1a9a641b0bf327d749169c03bf8740a755d
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SSDEEP
3072:ZhpAyazIlyazTNao84K0NIGEbzWjFFhOXyowj7CdZhXnPdyHHQtl:hZMaz5n5K0NIGEXWvhO0fCvxnP4nEl
Malware Config
Signatures
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Executes dropped EXE 2 IoCs
Processes:
CTS.exewlO29r45Y84jBIT.exepid process 2936 CTS.exe 1952 wlO29r45Y84jBIT.exe -
Loads dropped DLL 2 IoCs
Processes:
2024-05-23_22cf817b2e56d2407ebea36cbb151ce4_bkransomware.exepid process 2804 2024-05-23_22cf817b2e56d2407ebea36cbb151ce4_bkransomware.exe 2512 -
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:
2024-05-23_22cf817b2e56d2407ebea36cbb151ce4_bkransomware.exeCTS.exedescription ioc process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" 2024-05-23_22cf817b2e56d2407ebea36cbb151ce4_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:
2024-05-23_22cf817b2e56d2407ebea36cbb151ce4_bkransomware.exeCTS.exedescription ioc process File created C:\Windows\CTS.exe 2024-05-23_22cf817b2e56d2407ebea36cbb151ce4_bkransomware.exe File created C:\Windows\CTS.exe CTS.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
2024-05-23_22cf817b2e56d2407ebea36cbb151ce4_bkransomware.exeCTS.exedescription pid process Token: SeDebugPrivilege 2804 2024-05-23_22cf817b2e56d2407ebea36cbb151ce4_bkransomware.exe Token: SeDebugPrivilege 2936 CTS.exe -
Suspicious use of WriteProcessMemory 8 IoCs
Processes:
2024-05-23_22cf817b2e56d2407ebea36cbb151ce4_bkransomware.exedescription pid process target process PID 2804 wrote to memory of 1952 2804 2024-05-23_22cf817b2e56d2407ebea36cbb151ce4_bkransomware.exe wlO29r45Y84jBIT.exe PID 2804 wrote to memory of 1952 2804 2024-05-23_22cf817b2e56d2407ebea36cbb151ce4_bkransomware.exe wlO29r45Y84jBIT.exe PID 2804 wrote to memory of 1952 2804 2024-05-23_22cf817b2e56d2407ebea36cbb151ce4_bkransomware.exe wlO29r45Y84jBIT.exe PID 2804 wrote to memory of 1952 2804 2024-05-23_22cf817b2e56d2407ebea36cbb151ce4_bkransomware.exe wlO29r45Y84jBIT.exe PID 2804 wrote to memory of 2936 2804 2024-05-23_22cf817b2e56d2407ebea36cbb151ce4_bkransomware.exe CTS.exe PID 2804 wrote to memory of 2936 2804 2024-05-23_22cf817b2e56d2407ebea36cbb151ce4_bkransomware.exe CTS.exe PID 2804 wrote to memory of 2936 2804 2024-05-23_22cf817b2e56d2407ebea36cbb151ce4_bkransomware.exe CTS.exe PID 2804 wrote to memory of 2936 2804 2024-05-23_22cf817b2e56d2407ebea36cbb151ce4_bkransomware.exe CTS.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-23_22cf817b2e56d2407ebea36cbb151ce4_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-23_22cf817b2e56d2407ebea36cbb151ce4_bkransomware.exe"1⤵
- Loads dropped DLL
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\wlO29r45Y84jBIT.exeC:\Users\Admin\AppData\Local\Temp\wlO29r45Y84jBIT.exe2⤵
- Executes dropped EXE
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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
Network
MITRE ATT&CK Matrix ATT&CK v13
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Local\Temp\wlO29r45Y84jBIT.exeFilesize
172KB
MD5ef3c39fc33ef903db61d7157d8240375
SHA11cba3835fd239a629657013e8b5c1d3c50991389
SHA256493ac55386ec57e913e3e1d9a23c68a8152746d285abc5521e50e021a3fedf2c
SHA5126654146698ac189512f1987bb10b28914e2d06097c19da983b29a63061086535dce39c9e15be3493d1947caab9f34ea331d3f5f09af03650163f3a4790ff7ca3
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C:\Windows\CTS.exeFilesize
71KB
MD566df4ffab62e674af2e75b163563fc0b
SHA1dec8a197312e41eeb3cfef01cb2a443f0205cd6e
SHA256075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163
SHA5121588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25
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\Users\Admin\AppData\Local\Temp\wlO29r45Y84jBIT.exeFilesize
100KB
MD5db697c943fcb215f757f9c22c907c568
SHA1c57d891472f5ede8b1ee5d9bd6f5ad8fc8e9e5d7
SHA25607c96337729e3c4c986e8f5660a97cb475c4c04842606be2654b37892af57de9
SHA512bfa5c34d8c78015ccf96a2ef1c6d8f82157eb88680139bdbb51c55e3cd2a7c41bf364a364fd62b180b202cdf4f3d7d31c3710b8709c1d25a639bb00dfc97b646