Analysis
-
max time kernel
119s -
max time network
119s -
platform
windows7_x64 -
resource
win7-20240221-en -
resource tags
arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system -
submitted
28-04-2024 14:25
Static task
static1
Behavioral task
behavioral1
Sample
2024-04-28_18035c50806a85bb1e000ed4fdaefc6c_bkransomware.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-04-28_18035c50806a85bb1e000ed4fdaefc6c_bkransomware.exe
Resource
win10v2004-20240419-en
General
-
Target
2024-04-28_18035c50806a85bb1e000ed4fdaefc6c_bkransomware.exe
-
Size
71KB
-
MD5
18035c50806a85bb1e000ed4fdaefc6c
-
SHA1
34d896903f8f0aa7793844015acee272023ac1b7
-
SHA256
ee2c4a805831a5226ec25253f18d39de662a32863645fb0fe495fecf94b8a547
-
SHA512
57b8cae08153a1ada8282849cff61676abcf4f97e1311bdc72be6f5fc895c08bc36a35ae5995a5f9c888266ed6f724c270c6aaafea554e6c3f51fcc9ce13d2d6
-
SSDEEP
1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTk:ZhpAyazIlyazTk
Malware Config
Signatures
-
Executes dropped EXE 1 IoCs
Processes:
CTS.exepid process 1684 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:
2024-04-28_18035c50806a85bb1e000ed4fdaefc6c_bkransomware.exeCTS.exedescription ioc process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" 2024-04-28_18035c50806a85bb1e000ed4fdaefc6c_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_18035c50806a85bb1e000ed4fdaefc6c_bkransomware.exeCTS.exedescription ioc process File created C:\Windows\CTS.exe 2024-04-28_18035c50806a85bb1e000ed4fdaefc6c_bkransomware.exe File created C:\Windows\CTS.exe CTS.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
2024-04-28_18035c50806a85bb1e000ed4fdaefc6c_bkransomware.exeCTS.exedescription pid process Token: SeDebugPrivilege 2756 2024-04-28_18035c50806a85bb1e000ed4fdaefc6c_bkransomware.exe Token: SeDebugPrivilege 1684 CTS.exe -
Suspicious use of WriteProcessMemory 4 IoCs
Processes:
2024-04-28_18035c50806a85bb1e000ed4fdaefc6c_bkransomware.exedescription pid process target process PID 2756 wrote to memory of 1684 2756 2024-04-28_18035c50806a85bb1e000ed4fdaefc6c_bkransomware.exe CTS.exe PID 2756 wrote to memory of 1684 2756 2024-04-28_18035c50806a85bb1e000ed4fdaefc6c_bkransomware.exe CTS.exe PID 2756 wrote to memory of 1684 2756 2024-04-28_18035c50806a85bb1e000ed4fdaefc6c_bkransomware.exe CTS.exe PID 2756 wrote to memory of 1684 2756 2024-04-28_18035c50806a85bb1e000ed4fdaefc6c_bkransomware.exe CTS.exe
Processes
-
C:\Users\Admin\AppData\Local\Temp\2024-04-28_18035c50806a85bb1e000ed4fdaefc6c_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-04-28_18035c50806a85bb1e000ed4fdaefc6c_bkransomware.exe"1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2756 -
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:1684
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
-
C:\Users\Admin\AppData\Local\Temp\45KTGIW9gn6jszS.exeFilesize
71KB
MD5e2ed1cc0ac20787522ac135581f55059
SHA1987767ba94042b193a07f7ee3694c8f1d9d052da
SHA256f01ed8bede0618bdc2183d29e03a0795602b293543fe78bb7bc384b2a8bc4398
SHA512b894099cba2993b30b35919b9f86e1fb811195f72d915f669a19774ab4e4dc20166f24e877ad2e024bb0de1c11f0416200b19ffc38d76e60bfc27aae66da6cba
-
C:\Windows\CTS.exeFilesize
71KB
MD566df4ffab62e674af2e75b163563fc0b
SHA1dec8a197312e41eeb3cfef01cb2a443f0205cd6e
SHA256075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163
SHA5121588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25