Analysis
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max time kernel
121s -
max time network
122s -
platform
windows7_x64 -
resource
win7-20240215-en -
resource tags
arch:x64arch:x86image:win7-20240215-enlocale:en-usos:windows7-x64system -
submitted
28-04-2024 04:55
Static task
static1
Behavioral task
behavioral1
Sample
2024-04-28_e7c16020ea6e695836f84d7bb6228635_bkransomware.exe
Resource
win7-20240215-en
Behavioral task
behavioral2
Sample
2024-04-28_e7c16020ea6e695836f84d7bb6228635_bkransomware.exe
Resource
win10v2004-20240226-en
General
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Target
2024-04-28_e7c16020ea6e695836f84d7bb6228635_bkransomware.exe
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Size
96KB
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MD5
e7c16020ea6e695836f84d7bb6228635
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SHA1
05f4a10b0490e52acb2850f4ee29f68b94649edc
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SHA256
3d6bca3407b021f44118d16e93201d657451769f87ac38cc2c58e32693d72c30
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SHA512
251c1169a25b4d6feb221ea5c7a8af513f87e0349cf2e9e4431d7462fc96804771a071118efebd1eb65c39e73aeac3993d5ee4ce63b5aafbbea79914f79cd67b
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SSDEEP
1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTQuID6RJYVXpT:ZRpAyazIliazTQuI+ReVXd
Malware Config
Signatures
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Executes dropped EXE 2 IoCs
Processes:
inuWe0g48vhJM14.exeCTS.exepid process 2728 inuWe0g48vhJM14.exe 2512 CTS.exe -
Loads dropped DLL 3 IoCs
Processes:
2024-04-28_e7c16020ea6e695836f84d7bb6228635_bkransomware.exepid process 2484 2024-04-28_e7c16020ea6e695836f84d7bb6228635_bkransomware.exe 2484 2024-04-28_e7c16020ea6e695836f84d7bb6228635_bkransomware.exe 1960 -
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:
2024-04-28_e7c16020ea6e695836f84d7bb6228635_bkransomware.exeCTS.exedescription ioc process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" 2024-04-28_e7c16020ea6e695836f84d7bb6228635_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_e7c16020ea6e695836f84d7bb6228635_bkransomware.exeCTS.exedescription ioc process File created C:\Windows\CTS.exe 2024-04-28_e7c16020ea6e695836f84d7bb6228635_bkransomware.exe File created C:\Windows\CTS.exe CTS.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
2024-04-28_e7c16020ea6e695836f84d7bb6228635_bkransomware.exeCTS.exedescription pid process Token: SeDebugPrivilege 2484 2024-04-28_e7c16020ea6e695836f84d7bb6228635_bkransomware.exe Token: SeDebugPrivilege 2512 CTS.exe -
Suspicious use of WriteProcessMemory 8 IoCs
Processes:
2024-04-28_e7c16020ea6e695836f84d7bb6228635_bkransomware.exedescription pid process target process PID 2484 wrote to memory of 2728 2484 2024-04-28_e7c16020ea6e695836f84d7bb6228635_bkransomware.exe inuWe0g48vhJM14.exe PID 2484 wrote to memory of 2728 2484 2024-04-28_e7c16020ea6e695836f84d7bb6228635_bkransomware.exe inuWe0g48vhJM14.exe PID 2484 wrote to memory of 2728 2484 2024-04-28_e7c16020ea6e695836f84d7bb6228635_bkransomware.exe inuWe0g48vhJM14.exe PID 2484 wrote to memory of 2728 2484 2024-04-28_e7c16020ea6e695836f84d7bb6228635_bkransomware.exe inuWe0g48vhJM14.exe PID 2484 wrote to memory of 2512 2484 2024-04-28_e7c16020ea6e695836f84d7bb6228635_bkransomware.exe CTS.exe PID 2484 wrote to memory of 2512 2484 2024-04-28_e7c16020ea6e695836f84d7bb6228635_bkransomware.exe CTS.exe PID 2484 wrote to memory of 2512 2484 2024-04-28_e7c16020ea6e695836f84d7bb6228635_bkransomware.exe CTS.exe PID 2484 wrote to memory of 2512 2484 2024-04-28_e7c16020ea6e695836f84d7bb6228635_bkransomware.exe CTS.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-04-28_e7c16020ea6e695836f84d7bb6228635_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-04-28_e7c16020ea6e695836f84d7bb6228635_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
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C:\Users\Admin\AppData\Local\Temp\inuWe0g48vhJM14.exeC:\Users\Admin\AppData\Local\Temp\inuWe0g48vhJM14.exe2⤵
- Executes dropped EXE
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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:\Windows\CTS.exeFilesize
71KB
MD5f9d4ab0a726adc9b5e4b7d7b724912f1
SHA13d42ca2098475924f70ee4a831c4f003b4682328
SHA256b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc
SHA51222a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432
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\Users\Admin\AppData\Local\Temp\inuWe0g48vhJM14.exeFilesize
25KB
MD5abbd49c180a2f8703f6306d6fa731fdc
SHA1d63f4bfe7f74936b2fbace803e3da6103fbf6586
SHA2565f411c0bd9ed9a42b0f07ed568c7d0cf358a83063b225a1f8f7da3296dde90f1
SHA512290dd984acc451b778f3db8c510bae7aec1d9547c3ad0a1829df731c136e4ecc9a37dc6a786cf8f1ecc4d14339aed1288af25055f450f6f953138c8d4d5c36e9
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memory/2728-15-0x0000000000400000-0x000000000040D000-memory.dmpFilesize
52KB