Analysis
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max time kernel
117s -
max time network
118s -
platform
windows7_x64 -
resource
win7-20240508-en -
resource tags
arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system -
submitted
27-05-2024 06:36
Static task
static1
Behavioral task
behavioral1
Sample
2024-05-27_aca7b8ee0d6846564ad083cd3758902a_bkransomware.exe
Resource
win7-20240508-en
Behavioral task
behavioral2
Sample
2024-05-27_aca7b8ee0d6846564ad083cd3758902a_bkransomware.exe
Resource
win10v2004-20240508-en
General
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Target
2024-05-27_aca7b8ee0d6846564ad083cd3758902a_bkransomware.exe
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Size
71KB
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MD5
aca7b8ee0d6846564ad083cd3758902a
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SHA1
18ad718453dc5c34e0002470084511b839a46f54
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SHA256
9665ffbe036b6b4d6cf6e02b38b50cb5efd4af90d56eed0c13b0ebd325f8c94f
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SHA512
26bae61277fd814ea17c907b49153d579856c1844593824f6303c153209c8c1ac72e75640c3a46c31d39459fb195ce872db77a3c7ab893eb0ed761bc8ce3a1d5
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SSDEEP
1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTe:ZRpAyazIliazTe
Malware Config
Signatures
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Executes dropped EXE 1 IoCs
Processes:
CTS.exepid process 1712 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:
2024-05-27_aca7b8ee0d6846564ad083cd3758902a_bkransomware.exeCTS.exedescription ioc process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" 2024-05-27_aca7b8ee0d6846564ad083cd3758902a_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:
2024-05-27_aca7b8ee0d6846564ad083cd3758902a_bkransomware.exeCTS.exedescription ioc process File created C:\Windows\CTS.exe 2024-05-27_aca7b8ee0d6846564ad083cd3758902a_bkransomware.exe File created C:\Windows\CTS.exe CTS.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
2024-05-27_aca7b8ee0d6846564ad083cd3758902a_bkransomware.exeCTS.exedescription pid process Token: SeDebugPrivilege 1704 2024-05-27_aca7b8ee0d6846564ad083cd3758902a_bkransomware.exe Token: SeDebugPrivilege 1712 CTS.exe -
Suspicious use of WriteProcessMemory 4 IoCs
Processes:
2024-05-27_aca7b8ee0d6846564ad083cd3758902a_bkransomware.exedescription pid process target process PID 1704 wrote to memory of 1712 1704 2024-05-27_aca7b8ee0d6846564ad083cd3758902a_bkransomware.exe CTS.exe PID 1704 wrote to memory of 1712 1704 2024-05-27_aca7b8ee0d6846564ad083cd3758902a_bkransomware.exe CTS.exe PID 1704 wrote to memory of 1712 1704 2024-05-27_aca7b8ee0d6846564ad083cd3758902a_bkransomware.exe CTS.exe PID 1704 wrote to memory of 1712 1704 2024-05-27_aca7b8ee0d6846564ad083cd3758902a_bkransomware.exe CTS.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-27_aca7b8ee0d6846564ad083cd3758902a_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-27_aca7b8ee0d6846564ad083cd3758902a_bkransomware.exe"1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1704 -
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:1712
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
71KB
MD56688793da019bfec061abe082e1eaa94
SHA18a42a8a56b870797094cde70442b0f50c4e85f67
SHA2568c4dea29d3c2cb88bbb45f19f8c2416da400dc860e319cedabc7fbe3a2606f74
SHA512a98ccb63ada216071afd4bbb3b491a43d493cfaf391392053ba4e2d5f72055eb82445a7563832a1c250a01df5c04955b171d8e2b62a1458ccf716b58817b3ce5
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Filesize
71KB
MD5f9d4ab0a726adc9b5e4b7d7b724912f1
SHA13d42ca2098475924f70ee4a831c4f003b4682328
SHA256b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc
SHA51222a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432