Analysis
-
max time kernel
79s -
max time network
99s -
platform
windows10-2004_x64 -
resource
win10v2004-20240508-en -
resource tags
arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system -
submitted
12-06-2024 14:41
Static task
static1
Behavioral task
behavioral1
Sample
2024-06-12_679c3344329b0d32d28bd1c392772082_bkransomware.exe
Resource
win7-20240508-en
Behavioral task
behavioral2
Sample
2024-06-12_679c3344329b0d32d28bd1c392772082_bkransomware.exe
Resource
win10v2004-20240508-en
General
-
Target
2024-06-12_679c3344329b0d32d28bd1c392772082_bkransomware.exe
-
Size
71KB
-
MD5
679c3344329b0d32d28bd1c392772082
-
SHA1
e321ef63f793d6c76378c73bf9fc43a86c57fff4
-
SHA256
cea8457cf83420c20d47290e0527895f0c572d68527ad2e0011e1e64827e40ba
-
SHA512
ed787a9d5b152b8b29671c215b71390b004fdec74d137058410ffa4051b9a32679447b75d89bce901f0292d810cadf82d9d9f63c2f42fba3502d3709576b3acb
-
SSDEEP
1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTo:ZhpAyazIlyazTo
Malware Config
Signatures
-
Executes dropped EXE 1 IoCs
Processes:
CTS.exepid Process 2668 CTS.exe -
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
-
Adds Run key to start application 2 TTPs 2 IoCs
Processes:
2024-06-12_679c3344329b0d32d28bd1c392772082_bkransomware.exeCTS.exedescription ioc Process Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" 2024-06-12_679c3344329b0d32d28bd1c392772082_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:
2024-06-12_679c3344329b0d32d28bd1c392772082_bkransomware.exeCTS.exedescription ioc Process File created C:\Windows\CTS.exe 2024-06-12_679c3344329b0d32d28bd1c392772082_bkransomware.exe File created C:\Windows\CTS.exe CTS.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
2024-06-12_679c3344329b0d32d28bd1c392772082_bkransomware.exeCTS.exedescription pid Process Token: SeDebugPrivilege 1948 2024-06-12_679c3344329b0d32d28bd1c392772082_bkransomware.exe Token: SeDebugPrivilege 2668 CTS.exe -
Suspicious use of WriteProcessMemory 3 IoCs
Processes:
2024-06-12_679c3344329b0d32d28bd1c392772082_bkransomware.exedescription pid Process procid_target PID 1948 wrote to memory of 2668 1948 2024-06-12_679c3344329b0d32d28bd1c392772082_bkransomware.exe 82 PID 1948 wrote to memory of 2668 1948 2024-06-12_679c3344329b0d32d28bd1c392772082_bkransomware.exe 82 PID 1948 wrote to memory of 2668 1948 2024-06-12_679c3344329b0d32d28bd1c392772082_bkransomware.exe 82
Processes
-
C:\Users\Admin\AppData\Local\Temp\2024-06-12_679c3344329b0d32d28bd1c392772082_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-12_679c3344329b0d32d28bd1c392772082_bkransomware.exe"1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1948 -
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:2668
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
-
Filesize
394KB
MD5b03b6832030712c8a8548971395c096d
SHA12ade28577a355a836f86d040e8449c3f402e2525
SHA256bed1952f9342b9654dab71f4b109f0bde5f3df08ed13bc71f17366c897556bb7
SHA512a4f1c546cdbe58a9169097deb8966f5cf7948d571671a68a350eddcb6cea56a005147a80eb60b65efc7032ed73f04bcb7b7ecb9922e47bef29082d2b1a7587a3
-
Filesize
71KB
MD58890adb076704c4003ed7c9376ead293
SHA142cace7a4c0d12981345577d2f5b3c1093f21bd5
SHA25687c18c571438afe98f843eb4445573a564d61783ac8fd2332f79cab1a384f6f0
SHA512ff9961e3834ed79ec07baab3386fb81da870ac2bc641387d17849da1e8870949b7b3c6033e7cceb4e0a8e6a5a0c099670812d78f3420e141f91a6455ff8d2bef
-
Filesize
71KB
MD566df4ffab62e674af2e75b163563fc0b
SHA1dec8a197312e41eeb3cfef01cb2a443f0205cd6e
SHA256075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163
SHA5121588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25