Analysis
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max time kernel
119s -
max time network
119s -
platform
windows7_x64 -
resource
win7-20231129-en -
resource tags
arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system -
submitted
24-05-2024 21:27
Static task
static1
Behavioral task
behavioral1
Sample
2024-05-24_2353087a62ffefed7787a4a564229d00_bkransomware.exe
Resource
win7-20231129-en
Behavioral task
behavioral2
Sample
2024-05-24_2353087a62ffefed7787a4a564229d00_bkransomware.exe
Resource
win10v2004-20240508-en
General
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Target
2024-05-24_2353087a62ffefed7787a4a564229d00_bkransomware.exe
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Size
96KB
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MD5
2353087a62ffefed7787a4a564229d00
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SHA1
e174e48f98004c8025d434d81897e5185ee3c8f0
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SHA256
f5f39afafd04b7ee684e4d82468d9bea613ab98ff50f9b12a37ebad75b8371ca
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SHA512
588fd7f5c8b4f76255e0b348fe04256eae91ed0c1489f7da310e68aedd6a20d607b33f51a4f4ec4870a36e05e09ad20a32ec065ea89cee1c33885f76a9226e83
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SSDEEP
1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTWgapbJHuqn5sOWvV8Vg2/KM:ZRpAyazIliazTWgcNHuUYN8L
Malware Config
Signatures
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Executes dropped EXE 3 IoCs
Processes:
nlvyXpszpvLTk88.exeCTS.exepid process 1592 nlvyXpszpvLTk88.exe 2196 CTS.exe 1348 -
Loads dropped DLL 4 IoCs
Processes:
2024-05-24_2353087a62ffefed7787a4a564229d00_bkransomware.exepid process 2820 2024-05-24_2353087a62ffefed7787a4a564229d00_bkransomware.exe 2820 2024-05-24_2353087a62ffefed7787a4a564229d00_bkransomware.exe 2188 1348 -
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_2353087a62ffefed7787a4a564229d00_bkransomware.exeCTS.exedescription ioc process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" 2024-05-24_2353087a62ffefed7787a4a564229d00_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_2353087a62ffefed7787a4a564229d00_bkransomware.exeCTS.exedescription ioc process File created C:\Windows\CTS.exe 2024-05-24_2353087a62ffefed7787a4a564229d00_bkransomware.exe File created C:\Windows\CTS.exe CTS.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
2024-05-24_2353087a62ffefed7787a4a564229d00_bkransomware.exeCTS.exedescription pid process Token: SeDebugPrivilege 2820 2024-05-24_2353087a62ffefed7787a4a564229d00_bkransomware.exe Token: SeDebugPrivilege 2196 CTS.exe -
Suspicious use of WriteProcessMemory 8 IoCs
Processes:
2024-05-24_2353087a62ffefed7787a4a564229d00_bkransomware.exedescription pid process target process PID 2820 wrote to memory of 1592 2820 2024-05-24_2353087a62ffefed7787a4a564229d00_bkransomware.exe nlvyXpszpvLTk88.exe PID 2820 wrote to memory of 1592 2820 2024-05-24_2353087a62ffefed7787a4a564229d00_bkransomware.exe nlvyXpszpvLTk88.exe PID 2820 wrote to memory of 1592 2820 2024-05-24_2353087a62ffefed7787a4a564229d00_bkransomware.exe nlvyXpszpvLTk88.exe PID 2820 wrote to memory of 1592 2820 2024-05-24_2353087a62ffefed7787a4a564229d00_bkransomware.exe nlvyXpszpvLTk88.exe PID 2820 wrote to memory of 2196 2820 2024-05-24_2353087a62ffefed7787a4a564229d00_bkransomware.exe CTS.exe PID 2820 wrote to memory of 2196 2820 2024-05-24_2353087a62ffefed7787a4a564229d00_bkransomware.exe CTS.exe PID 2820 wrote to memory of 2196 2820 2024-05-24_2353087a62ffefed7787a4a564229d00_bkransomware.exe CTS.exe PID 2820 wrote to memory of 2196 2820 2024-05-24_2353087a62ffefed7787a4a564229d00_bkransomware.exe CTS.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-24_2353087a62ffefed7787a4a564229d00_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-24_2353087a62ffefed7787a4a564229d00_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\nlvyXpszpvLTk88.exeC:\Users\Admin\AppData\Local\Temp\nlvyXpszpvLTk88.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\nlvyXpszpvLTk88.exeFilesize
25KB
MD5abbd49c180a2f8703f6306d6fa731fdc
SHA1d63f4bfe7f74936b2fbace803e3da6103fbf6586
SHA2565f411c0bd9ed9a42b0f07ed568c7d0cf358a83063b225a1f8f7da3296dde90f1
SHA512290dd984acc451b778f3db8c510bae7aec1d9547c3ad0a1829df731c136e4ecc9a37dc6a786cf8f1ecc4d14339aed1288af25055f450f6f953138c8d4d5c36e9
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memory/1592-14-0x0000000000400000-0x000000000040D000-memory.dmpFilesize
52KB