Analysis
-
max time kernel
117s -
max time network
117s -
platform
windows7_x64 -
resource
win7-20240221-en -
resource tags
arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system -
submitted
28-04-2024 14:24
Static task
static1
Behavioral task
behavioral1
Sample
2024-04-28_0f867c3ce1c998c463388fd48a949996_bkransomware.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-04-28_0f867c3ce1c998c463388fd48a949996_bkransomware.exe
Resource
win10v2004-20240419-en
General
-
Target
2024-04-28_0f867c3ce1c998c463388fd48a949996_bkransomware.exe
-
Size
96KB
-
MD5
0f867c3ce1c998c463388fd48a949996
-
SHA1
6e6ed7d5ed5febaa83b7312a7f556619359c3777
-
SHA256
258f37a762151c23752a0e61f1acb89d726275633c69b82a6d9f2140a0e6b948
-
SHA512
eea499cc7bde30a4b4c70273cd95cef9723ae1e64f6d336a3835a83ef626c104edb88e54b8578e3b9db1667d93cb5fa8e19219fcc8eb38cde4d013f176d803c0
-
SSDEEP
1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTXy9QdpS4KKgNIuhRwh:ZRpAyazIliazTXeQ7S4fgtDwh
Malware Config
Signatures
-
Executes dropped EXE 2 IoCs
Processes:
Vr427WrH6YfXSpg.exeCTS.exepid process 1712 Vr427WrH6YfXSpg.exe 2732 CTS.exe -
Loads dropped DLL 3 IoCs
Processes:
2024-04-28_0f867c3ce1c998c463388fd48a949996_bkransomware.exepid process 1688 2024-04-28_0f867c3ce1c998c463388fd48a949996_bkransomware.exe 1688 2024-04-28_0f867c3ce1c998c463388fd48a949996_bkransomware.exe 2728 -
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:
2024-04-28_0f867c3ce1c998c463388fd48a949996_bkransomware.exeCTS.exedescription ioc process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" 2024-04-28_0f867c3ce1c998c463388fd48a949996_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:
2024-04-28_0f867c3ce1c998c463388fd48a949996_bkransomware.exeCTS.exedescription ioc process File created C:\Windows\CTS.exe 2024-04-28_0f867c3ce1c998c463388fd48a949996_bkransomware.exe File created C:\Windows\CTS.exe CTS.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
2024-04-28_0f867c3ce1c998c463388fd48a949996_bkransomware.exeCTS.exedescription pid process Token: SeDebugPrivilege 1688 2024-04-28_0f867c3ce1c998c463388fd48a949996_bkransomware.exe Token: SeDebugPrivilege 2732 CTS.exe -
Suspicious use of WriteProcessMemory 8 IoCs
Processes:
2024-04-28_0f867c3ce1c998c463388fd48a949996_bkransomware.exedescription pid process target process PID 1688 wrote to memory of 1712 1688 2024-04-28_0f867c3ce1c998c463388fd48a949996_bkransomware.exe Vr427WrH6YfXSpg.exe PID 1688 wrote to memory of 1712 1688 2024-04-28_0f867c3ce1c998c463388fd48a949996_bkransomware.exe Vr427WrH6YfXSpg.exe PID 1688 wrote to memory of 1712 1688 2024-04-28_0f867c3ce1c998c463388fd48a949996_bkransomware.exe Vr427WrH6YfXSpg.exe PID 1688 wrote to memory of 1712 1688 2024-04-28_0f867c3ce1c998c463388fd48a949996_bkransomware.exe Vr427WrH6YfXSpg.exe PID 1688 wrote to memory of 2732 1688 2024-04-28_0f867c3ce1c998c463388fd48a949996_bkransomware.exe CTS.exe PID 1688 wrote to memory of 2732 1688 2024-04-28_0f867c3ce1c998c463388fd48a949996_bkransomware.exe CTS.exe PID 1688 wrote to memory of 2732 1688 2024-04-28_0f867c3ce1c998c463388fd48a949996_bkransomware.exe CTS.exe PID 1688 wrote to memory of 2732 1688 2024-04-28_0f867c3ce1c998c463388fd48a949996_bkransomware.exe CTS.exe
Processes
-
C:\Users\Admin\AppData\Local\Temp\2024-04-28_0f867c3ce1c998c463388fd48a949996_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-04-28_0f867c3ce1c998c463388fd48a949996_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
-
C:\Users\Admin\AppData\Local\Temp\Vr427WrH6YfXSpg.exeC:\Users\Admin\AppData\Local\Temp\Vr427WrH6YfXSpg.exe2⤵
- Executes dropped EXE
-
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
Loading Replay Monitor...
Downloads
-
C:\Users\Admin\AppData\Local\Temp\Vr427WrH6YfXSpg.exeFilesize
96KB
MD58dc12c1923ba523cebe4368f984239bb
SHA1c146b649a46dff5634efb7d3937e46c7dfc3314e
SHA256d36cdbc1b6b5a58782a62c67059be40ae3c0f5aa21a9b5ccfba60f8865ca097a
SHA5121429ffd6e39eaced6569fa6150e4231782d3e788452f79a7eb718c017704ed2c0ffdd3498fa1cbbd6a10cc55135d7826949a611a950a8d7dc5ac36e84ed064b8
-
C:\Windows\CTS.exeFilesize
71KB
MD5f9d4ab0a726adc9b5e4b7d7b724912f1
SHA13d42ca2098475924f70ee4a831c4f003b4682328
SHA256b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc
SHA51222a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432
-
\Users\Admin\AppData\Local\Temp\Vr427WrH6YfXSpg.exeFilesize
25KB
MD5abbd49c180a2f8703f6306d6fa731fdc
SHA1d63f4bfe7f74936b2fbace803e3da6103fbf6586
SHA2565f411c0bd9ed9a42b0f07ed568c7d0cf358a83063b225a1f8f7da3296dde90f1
SHA512290dd984acc451b778f3db8c510bae7aec1d9547c3ad0a1829df731c136e4ecc9a37dc6a786cf8f1ecc4d14339aed1288af25055f450f6f953138c8d4d5c36e9
-
memory/1712-15-0x0000000000400000-0x000000000040D000-memory.dmpFilesize
52KB