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Analysis
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max time kernel
119s -
max time network
124s -
platform
windows7_x64 -
resource
win7-20240221-en -
resource tags
arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system -
submitted
04/05/2024, 10:25
Static task
static1
Behavioral task
behavioral1
Sample
2024-05-04_0b9fdec44c17afee1305cfba0a5aa20b_bkransomware.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-05-04_0b9fdec44c17afee1305cfba0a5aa20b_bkransomware.exe
Resource
win10v2004-20240226-en
General
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Target
2024-05-04_0b9fdec44c17afee1305cfba0a5aa20b_bkransomware.exe
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Size
214KB
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MD5
0b9fdec44c17afee1305cfba0a5aa20b
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SHA1
0e6fa5d6d451c3b6644a0ec5b77a5ea78ce7eb9f
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SHA256
99acb0153f756f96c418e9e5b14d3148c3c9faba157786c2db199ac44be67c2c
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SHA512
aa0ef5df434940de31bd8f8c1b6943875d4f2445c48692c1b6f15c816fafdff7b9594324b769a2a74b6aa9d11c4220c34f1ce5dcc8fa68aa320f67d0e4aa7202
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SSDEEP
3072:ZhpAyazIlyazTmAvJMAgcayFHoh7YgB3u+2IcqUfN6eaTxvwGXVxuA3Yip:hZMazDMAFtFIWglu+kfNXaTGIeA3Yip
Malware Config
Signatures
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Executes dropped EXE 2 IoCs
pid Process 2996 CTS.exe 2084 52T4sTBYNKLzIxU.exe -
Loads dropped DLL 1 IoCs
pid Process 2320 2024-05-04_0b9fdec44c17afee1305cfba0a5aa20b_bkransomware.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
description ioc Process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" 2024-05-04_0b9fdec44c17afee1305cfba0a5aa20b_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 2024-05-04_0b9fdec44c17afee1305cfba0a5aa20b_bkransomware.exe File created C:\Windows\CTS.exe CTS.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 2320 2024-05-04_0b9fdec44c17afee1305cfba0a5aa20b_bkransomware.exe Token: SeDebugPrivilege 2996 CTS.exe -
Suspicious use of WriteProcessMemory 8 IoCs
description pid Process procid_target PID 2320 wrote to memory of 2084 2320 2024-05-04_0b9fdec44c17afee1305cfba0a5aa20b_bkransomware.exe 28 PID 2320 wrote to memory of 2084 2320 2024-05-04_0b9fdec44c17afee1305cfba0a5aa20b_bkransomware.exe 28 PID 2320 wrote to memory of 2084 2320 2024-05-04_0b9fdec44c17afee1305cfba0a5aa20b_bkransomware.exe 28 PID 2320 wrote to memory of 2084 2320 2024-05-04_0b9fdec44c17afee1305cfba0a5aa20b_bkransomware.exe 28 PID 2320 wrote to memory of 2996 2320 2024-05-04_0b9fdec44c17afee1305cfba0a5aa20b_bkransomware.exe 29 PID 2320 wrote to memory of 2996 2320 2024-05-04_0b9fdec44c17afee1305cfba0a5aa20b_bkransomware.exe 29 PID 2320 wrote to memory of 2996 2320 2024-05-04_0b9fdec44c17afee1305cfba0a5aa20b_bkransomware.exe 29 PID 2320 wrote to memory of 2996 2320 2024-05-04_0b9fdec44c17afee1305cfba0a5aa20b_bkransomware.exe 29
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-04_0b9fdec44c17afee1305cfba0a5aa20b_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-04_0b9fdec44c17afee1305cfba0a5aa20b_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
PID:2320 -
C:\Users\Admin\AppData\Local\Temp\52T4sTBYNKLzIxU.exeC:\Users\Admin\AppData\Local\Temp\52T4sTBYNKLzIxU.exe2⤵
- Executes dropped EXE
PID:2084
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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:2996
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
71KB
MD566df4ffab62e674af2e75b163563fc0b
SHA1dec8a197312e41eeb3cfef01cb2a443f0205cd6e
SHA256075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163
SHA5121588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25
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Filesize
143KB
MD52fdb371d45181dff59577110ba1064e2
SHA142a5833cb0ac90e38d734d1327bb3f7c7a6aa453
SHA25680d7ec8ce3913d81ea5d4f304b8609e56f0e49778c52af9279e742ea54f4a155
SHA51252982041ba9ca552b90b79b251501ec6c33c5251d09ca9969a1b179af2ec17aca6eb81db6e588e12751bcea04208e1da8d5a754a979dd98ceb3f50780aadea20