Analysis
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max time kernel
148s -
max time network
149s -
platform
windows10-2004_x64 -
resource
win10v2004-20240508-en -
resource tags
arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system -
submitted
24-05-2024 22:16
Static task
static1
Behavioral task
behavioral1
Sample
2024-05-24_e6c89aeab5a9ff4fef6497c5ddb3d23b_bkransomware.exe
Resource
win7-20231129-en
Behavioral task
behavioral2
Sample
2024-05-24_e6c89aeab5a9ff4fef6497c5ddb3d23b_bkransomware.exe
Resource
win10v2004-20240508-en
General
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Target
2024-05-24_e6c89aeab5a9ff4fef6497c5ddb3d23b_bkransomware.exe
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Size
71KB
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MD5
e6c89aeab5a9ff4fef6497c5ddb3d23b
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SHA1
a09b1e72ceae245e983e3c7dfc0eb59707d8c272
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SHA256
3727dfc70cce2050d9b5db1677571431c32b516851e1133df3aa5a0a4ad6e06e
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SHA512
984d8f7fb9219f5f0fbd5d1ba0ae3287833e676e41c2884b537099a050e06de279db3382865dcc0bf96f8017ef76bd4daef8b5c4defae6ec483c3174a55b7409
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SSDEEP
1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazT2p:ZRpAyazIliazTy
Malware Config
Signatures
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Executes dropped EXE 1 IoCs
Processes:
CTS.exepid process 220 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:
2024-05-24_e6c89aeab5a9ff4fef6497c5ddb3d23b_bkransomware.exeCTS.exedescription ioc process Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" 2024-05-24_e6c89aeab5a9ff4fef6497c5ddb3d23b_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:
2024-05-24_e6c89aeab5a9ff4fef6497c5ddb3d23b_bkransomware.exeCTS.exedescription ioc process File created C:\Windows\CTS.exe 2024-05-24_e6c89aeab5a9ff4fef6497c5ddb3d23b_bkransomware.exe File created C:\Windows\CTS.exe CTS.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
2024-05-24_e6c89aeab5a9ff4fef6497c5ddb3d23b_bkransomware.exeCTS.exedescription pid process Token: SeDebugPrivilege 4684 2024-05-24_e6c89aeab5a9ff4fef6497c5ddb3d23b_bkransomware.exe Token: SeDebugPrivilege 220 CTS.exe -
Suspicious use of WriteProcessMemory 3 IoCs
Processes:
2024-05-24_e6c89aeab5a9ff4fef6497c5ddb3d23b_bkransomware.exedescription pid process target process PID 4684 wrote to memory of 220 4684 2024-05-24_e6c89aeab5a9ff4fef6497c5ddb3d23b_bkransomware.exe CTS.exe PID 4684 wrote to memory of 220 4684 2024-05-24_e6c89aeab5a9ff4fef6497c5ddb3d23b_bkransomware.exe CTS.exe PID 4684 wrote to memory of 220 4684 2024-05-24_e6c89aeab5a9ff4fef6497c5ddb3d23b_bkransomware.exe CTS.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-24_e6c89aeab5a9ff4fef6497c5ddb3d23b_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-24_e6c89aeab5a9ff4fef6497c5ddb3d23b_bkransomware.exe"1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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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
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Downloads
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C:\Users\Admin\AppData\Local\Microsoft\Office\16.0\excel.exe_Rules.xmlFilesize
392KB
MD57a288c67ebbd1a8d371c85ade14a6575
SHA10207a871489d6502cda90b5bb9e3896d670fb656
SHA256f95dc22cb81cc7fc3dd83afaa0adafb7c7edba2a5645c84f0719ff349402f3de
SHA5125dbc53c5389743ad5005a86f08ee64f9f537a5bc8f6eba083ce8f302fe8937b209ecea9c67c0437c01e928fe9d8f57c4a73233f50a8407a29f886d112981df33
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C:\Users\Admin\AppData\Local\Temp\gtpKMkFJhryyNLf.exeFilesize
71KB
MD56dbb93c99a09537b5481814744a9b8d1
SHA1fdd3c960f3e4c1c78f546bc6d75930a1f29390ea
SHA256664b27a8fe2bc667ebca7b0e13a2ae52b189791654ca8c0624dcea9e4bb6cf93
SHA5124b40c809b9fb65ac245dc9e94e5ae984ad872373b1c6ac3f781c4e430928b947565091b32385867eae8dd3ec40fa9bd272cea17f7f92630296f2fb538a74b60e
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C:\Windows\CTS.exeFilesize
71KB
MD5f9d4ab0a726adc9b5e4b7d7b724912f1
SHA13d42ca2098475924f70ee4a831c4f003b4682328
SHA256b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc
SHA51222a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432