Analysis
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max time kernel
118s -
max time network
119s -
platform
windows7_x64 -
resource
win7-20240215-en -
resource tags
arch:x64arch:x86image:win7-20240215-enlocale:en-usos:windows7-x64system -
submitted
27-04-2024 22:36
Static task
static1
Behavioral task
behavioral1
Sample
2024-04-27_8a6da26a2f9ee7dd7ceefac19325a033_bkransomware.exe
Resource
win7-20240215-en
Behavioral task
behavioral2
Sample
2024-04-27_8a6da26a2f9ee7dd7ceefac19325a033_bkransomware.exe
Resource
win10v2004-20240419-en
General
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Target
2024-04-27_8a6da26a2f9ee7dd7ceefac19325a033_bkransomware.exe
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Size
96KB
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MD5
8a6da26a2f9ee7dd7ceefac19325a033
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SHA1
0934998b4f9a33b5c63d3f2636447fb6565d84ea
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SHA256
0751b33d2a064d6efc3fb8af728c46c2182151ae3b8a8abe93f1e9d89a78473a
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SHA512
adef425da787cd52e1de5f7a4d560f7db5d30a7f4f99bff8f616f4ff3267e9a48feb82076d98f88b55940602d90c1c64aeae4e60a41c4360c058200df1db1f87
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SSDEEP
1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazT+Rl99YBLhmPbH3+8:ZhpAyazIlyazT+Rz92lmPbXB
Malware Config
Signatures
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Executes dropped EXE 2 IoCs
Processes:
KhujY2mw73CKkB8.exeCTS.exepid process 1716 KhujY2mw73CKkB8.exe 2636 CTS.exe -
Loads dropped DLL 3 IoCs
Processes:
2024-04-27_8a6da26a2f9ee7dd7ceefac19325a033_bkransomware.exepid process 2980 2024-04-27_8a6da26a2f9ee7dd7ceefac19325a033_bkransomware.exe 2980 2024-04-27_8a6da26a2f9ee7dd7ceefac19325a033_bkransomware.exe 2564 -
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_8a6da26a2f9ee7dd7ceefac19325a033_bkransomware.exeCTS.exedescription ioc process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" 2024-04-27_8a6da26a2f9ee7dd7ceefac19325a033_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_8a6da26a2f9ee7dd7ceefac19325a033_bkransomware.exeCTS.exedescription ioc process File created C:\Windows\CTS.exe 2024-04-27_8a6da26a2f9ee7dd7ceefac19325a033_bkransomware.exe File created C:\Windows\CTS.exe CTS.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
2024-04-27_8a6da26a2f9ee7dd7ceefac19325a033_bkransomware.exeCTS.exedescription pid process Token: SeDebugPrivilege 2980 2024-04-27_8a6da26a2f9ee7dd7ceefac19325a033_bkransomware.exe Token: SeDebugPrivilege 2636 CTS.exe -
Suspicious use of WriteProcessMemory 8 IoCs
Processes:
2024-04-27_8a6da26a2f9ee7dd7ceefac19325a033_bkransomware.exedescription pid process target process PID 2980 wrote to memory of 1716 2980 2024-04-27_8a6da26a2f9ee7dd7ceefac19325a033_bkransomware.exe KhujY2mw73CKkB8.exe PID 2980 wrote to memory of 1716 2980 2024-04-27_8a6da26a2f9ee7dd7ceefac19325a033_bkransomware.exe KhujY2mw73CKkB8.exe PID 2980 wrote to memory of 1716 2980 2024-04-27_8a6da26a2f9ee7dd7ceefac19325a033_bkransomware.exe KhujY2mw73CKkB8.exe PID 2980 wrote to memory of 1716 2980 2024-04-27_8a6da26a2f9ee7dd7ceefac19325a033_bkransomware.exe KhujY2mw73CKkB8.exe PID 2980 wrote to memory of 2636 2980 2024-04-27_8a6da26a2f9ee7dd7ceefac19325a033_bkransomware.exe CTS.exe PID 2980 wrote to memory of 2636 2980 2024-04-27_8a6da26a2f9ee7dd7ceefac19325a033_bkransomware.exe CTS.exe PID 2980 wrote to memory of 2636 2980 2024-04-27_8a6da26a2f9ee7dd7ceefac19325a033_bkransomware.exe CTS.exe PID 2980 wrote to memory of 2636 2980 2024-04-27_8a6da26a2f9ee7dd7ceefac19325a033_bkransomware.exe CTS.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-04-27_8a6da26a2f9ee7dd7ceefac19325a033_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-04-27_8a6da26a2f9ee7dd7ceefac19325a033_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\KhujY2mw73CKkB8.exeC:\Users\Admin\AppData\Local\Temp\KhujY2mw73CKkB8.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:\Windows\CTS.exeFilesize
71KB
MD566df4ffab62e674af2e75b163563fc0b
SHA1dec8a197312e41eeb3cfef01cb2a443f0205cd6e
SHA256075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163
SHA5121588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25
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\Users\Admin\AppData\Local\Temp\KhujY2mw73CKkB8.exeFilesize
25KB
MD5abbd49c180a2f8703f6306d6fa731fdc
SHA1d63f4bfe7f74936b2fbace803e3da6103fbf6586
SHA2565f411c0bd9ed9a42b0f07ed568c7d0cf358a83063b225a1f8f7da3296dde90f1
SHA512290dd984acc451b778f3db8c510bae7aec1d9547c3ad0a1829df731c136e4ecc9a37dc6a786cf8f1ecc4d14339aed1288af25055f450f6f953138c8d4d5c36e9
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memory/1716-15-0x0000000000400000-0x000000000040D000-memory.dmpFilesize
52KB