Analysis
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max time kernel
120s -
max time network
121s -
platform
windows7_x64 -
resource
win7-20231129-en -
resource tags
arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system -
submitted
27-04-2024 22:25
Static task
static1
Behavioral task
behavioral1
Sample
2024-04-27_23ae61343a6c0414f8649b8fb4ddcfe6_bkransomware.exe
Resource
win7-20231129-en
Behavioral task
behavioral2
Sample
2024-04-27_23ae61343a6c0414f8649b8fb4ddcfe6_bkransomware.exe
Resource
win10v2004-20240426-en
General
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Target
2024-04-27_23ae61343a6c0414f8649b8fb4ddcfe6_bkransomware.exe
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Size
71KB
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MD5
23ae61343a6c0414f8649b8fb4ddcfe6
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SHA1
9633159892df49a93fedc063d452ce43a474d835
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SHA256
2be84db3a1d3d9e82c96a16c57fa6caa825dca519ef347be8627f864aa8de073
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SHA512
ab9a80d0ba2a1e50d44e52eedd6facbb635d48e7152a5fbc7f94cf738f2def282e9b04715ae26cab69c4c68eae44862c6d9f71932b1d7c9c2a79c46207b82ad3
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SSDEEP
1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTE:ZhpAyazIlyazTE
Malware Config
Signatures
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Executes dropped EXE 1 IoCs
Processes:
CTS.exepid process 2708 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:
2024-04-27_23ae61343a6c0414f8649b8fb4ddcfe6_bkransomware.exeCTS.exedescription ioc process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" 2024-04-27_23ae61343a6c0414f8649b8fb4ddcfe6_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:
2024-04-27_23ae61343a6c0414f8649b8fb4ddcfe6_bkransomware.exeCTS.exedescription ioc process File created C:\Windows\CTS.exe 2024-04-27_23ae61343a6c0414f8649b8fb4ddcfe6_bkransomware.exe File created C:\Windows\CTS.exe CTS.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
2024-04-27_23ae61343a6c0414f8649b8fb4ddcfe6_bkransomware.exeCTS.exedescription pid process Token: SeDebugPrivilege 2936 2024-04-27_23ae61343a6c0414f8649b8fb4ddcfe6_bkransomware.exe Token: SeDebugPrivilege 2708 CTS.exe -
Suspicious use of WriteProcessMemory 4 IoCs
Processes:
2024-04-27_23ae61343a6c0414f8649b8fb4ddcfe6_bkransomware.exedescription pid process target process PID 2936 wrote to memory of 2708 2936 2024-04-27_23ae61343a6c0414f8649b8fb4ddcfe6_bkransomware.exe CTS.exe PID 2936 wrote to memory of 2708 2936 2024-04-27_23ae61343a6c0414f8649b8fb4ddcfe6_bkransomware.exe CTS.exe PID 2936 wrote to memory of 2708 2936 2024-04-27_23ae61343a6c0414f8649b8fb4ddcfe6_bkransomware.exe CTS.exe PID 2936 wrote to memory of 2708 2936 2024-04-27_23ae61343a6c0414f8649b8fb4ddcfe6_bkransomware.exe CTS.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-04-27_23ae61343a6c0414f8649b8fb4ddcfe6_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-04-27_23ae61343a6c0414f8649b8fb4ddcfe6_bkransomware.exe"1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2936 -
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:2708
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Local\Temp\fQRfd69LgrW9EpM.exeFilesize
71KB
MD5ef77da74c7e30a486f409b4100e8f706
SHA105011c6d051018f1abf4a7de8da231220dd34331
SHA256d0284a0ee7a46839a99dbd36f2e87b19ca278a5bb396743521eea249e727501e
SHA512f6ef441ea8111d99fcc404556ae31009b92b1d01d80a04b446683049cd4a2ca11ccddcfc4ce5feee0d2c14b33964e0ac86f3970cc6f8c89e5ab48d7b6f023863
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C:\Windows\CTS.exeFilesize
71KB
MD566df4ffab62e674af2e75b163563fc0b
SHA1dec8a197312e41eeb3cfef01cb2a443f0205cd6e
SHA256075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163
SHA5121588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25