Analysis
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max time kernel
119s -
max time network
120s -
platform
windows7_x64 -
resource
win7-20240508-en -
resource tags
arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system -
submitted
13-06-2024 03:45
Static task
static1
Behavioral task
behavioral1
Sample
2024-06-13_9a9168e5de25fc2ff66702805cb63db4_bkransomware.exe
Resource
win7-20240508-en
Behavioral task
behavioral2
Sample
2024-06-13_9a9168e5de25fc2ff66702805cb63db4_bkransomware.exe
Resource
win10v2004-20240611-en
General
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Target
2024-06-13_9a9168e5de25fc2ff66702805cb63db4_bkransomware.exe
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Size
71KB
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MD5
9a9168e5de25fc2ff66702805cb63db4
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SHA1
a1b6b0fd7f88f08fd2c73c00dedda115d726e8f9
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SHA256
e101f7550db0f220224e846a6a14da87450d2e401af676dc98c45aaf1cb22404
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SHA512
13f001d00f44bcca8f74b06d9ce0fdc5889453f4720d3ab2c3a556fc5ee9877a15d2fee48890b66d8fdf7fa074f1bf7c227c6850566f7621f8b0105e142d83ab
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SSDEEP
1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTO:ZhpAyazIlyazTO
Malware Config
Signatures
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Executes dropped EXE 1 IoCs
Processes:
CTS.exepid process 2160 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:
2024-06-13_9a9168e5de25fc2ff66702805cb63db4_bkransomware.exeCTS.exedescription ioc process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" 2024-06-13_9a9168e5de25fc2ff66702805cb63db4_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:
2024-06-13_9a9168e5de25fc2ff66702805cb63db4_bkransomware.exeCTS.exedescription ioc process File created C:\Windows\CTS.exe 2024-06-13_9a9168e5de25fc2ff66702805cb63db4_bkransomware.exe File created C:\Windows\CTS.exe CTS.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
2024-06-13_9a9168e5de25fc2ff66702805cb63db4_bkransomware.exeCTS.exedescription pid process Token: SeDebugPrivilege 1868 2024-06-13_9a9168e5de25fc2ff66702805cb63db4_bkransomware.exe Token: SeDebugPrivilege 2160 CTS.exe -
Suspicious use of WriteProcessMemory 4 IoCs
Processes:
2024-06-13_9a9168e5de25fc2ff66702805cb63db4_bkransomware.exedescription pid process target process PID 1868 wrote to memory of 2160 1868 2024-06-13_9a9168e5de25fc2ff66702805cb63db4_bkransomware.exe CTS.exe PID 1868 wrote to memory of 2160 1868 2024-06-13_9a9168e5de25fc2ff66702805cb63db4_bkransomware.exe CTS.exe PID 1868 wrote to memory of 2160 1868 2024-06-13_9a9168e5de25fc2ff66702805cb63db4_bkransomware.exe CTS.exe PID 1868 wrote to memory of 2160 1868 2024-06-13_9a9168e5de25fc2ff66702805cb63db4_bkransomware.exe CTS.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-06-13_9a9168e5de25fc2ff66702805cb63db4_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-13_9a9168e5de25fc2ff66702805cb63db4_bkransomware.exe"1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1868 -
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:2160
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
71KB
MD5fecc3dfb533d92e662f8f45fa8257b7a
SHA1f1deeebbc0d4b3a0a904f20bb0bee2492e0ea4d9
SHA256a1896e93895f2c7857136bdb2d3ca384095bdda82be4ac81d52463ac6986beaa
SHA512405bb7e2de5a36a6c7838ea8733ceac39007e6b3f1d9f57c71824002981e81a05c4fc78fb6e7b6f70a97b88a52ae062a2faa469211d0650e3b8e322eeae7b81a
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Filesize
71KB
MD566df4ffab62e674af2e75b163563fc0b
SHA1dec8a197312e41eeb3cfef01cb2a443f0205cd6e
SHA256075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163
SHA5121588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25