Analysis
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max time kernel
149s -
max time network
151s -
platform
windows10-2004_x64 -
resource
win10v2004-20240426-en -
resource tags
arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system -
submitted
28-04-2024 19:23
Static task
static1
Behavioral task
behavioral1
Sample
2024-04-28_0ce89eb3eaa5d7525ab8b6d20654bdc8_bkransomware.exe
Resource
win7-20231129-en
Behavioral task
behavioral2
Sample
2024-04-28_0ce89eb3eaa5d7525ab8b6d20654bdc8_bkransomware.exe
Resource
win10v2004-20240426-en
General
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Target
2024-04-28_0ce89eb3eaa5d7525ab8b6d20654bdc8_bkransomware.exe
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Size
96KB
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MD5
0ce89eb3eaa5d7525ab8b6d20654bdc8
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SHA1
3ab7e47a18e67246165169419b704a935baf1b1b
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SHA256
0c989cd7b1cfb0d5e78af40f55a99d0dcb74895eb3d3358ad60d3a4c2ec440b5
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SHA512
796236520cb58086d19a630cc083f084f34691ba46744ca0366fc321e671c287ff00f5ae086e3abd9d8a11f08e84070db85cbe95fc5adc6ad461ba16cbe65c52
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SSDEEP
1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTYcfw3HgNi16VKhyYnv:ZRpAyazIliazTY9GGqKhjnv
Malware Config
Signatures
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Executes dropped EXE 2 IoCs
Processes:
wjzyv5UDxOyA3C8.exeCTS.exepid process 456 wjzyv5UDxOyA3C8.exe 4288 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:
2024-04-28_0ce89eb3eaa5d7525ab8b6d20654bdc8_bkransomware.exeCTS.exedescription ioc process Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" 2024-04-28_0ce89eb3eaa5d7525ab8b6d20654bdc8_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_0ce89eb3eaa5d7525ab8b6d20654bdc8_bkransomware.exeCTS.exedescription ioc process File created C:\Windows\CTS.exe 2024-04-28_0ce89eb3eaa5d7525ab8b6d20654bdc8_bkransomware.exe File created C:\Windows\CTS.exe CTS.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
2024-04-28_0ce89eb3eaa5d7525ab8b6d20654bdc8_bkransomware.exeCTS.exedescription pid process Token: SeDebugPrivilege 1668 2024-04-28_0ce89eb3eaa5d7525ab8b6d20654bdc8_bkransomware.exe Token: SeDebugPrivilege 4288 CTS.exe -
Suspicious use of WriteProcessMemory 5 IoCs
Processes:
2024-04-28_0ce89eb3eaa5d7525ab8b6d20654bdc8_bkransomware.exedescription pid process target process PID 1668 wrote to memory of 456 1668 2024-04-28_0ce89eb3eaa5d7525ab8b6d20654bdc8_bkransomware.exe wjzyv5UDxOyA3C8.exe PID 1668 wrote to memory of 456 1668 2024-04-28_0ce89eb3eaa5d7525ab8b6d20654bdc8_bkransomware.exe wjzyv5UDxOyA3C8.exe PID 1668 wrote to memory of 4288 1668 2024-04-28_0ce89eb3eaa5d7525ab8b6d20654bdc8_bkransomware.exe CTS.exe PID 1668 wrote to memory of 4288 1668 2024-04-28_0ce89eb3eaa5d7525ab8b6d20654bdc8_bkransomware.exe CTS.exe PID 1668 wrote to memory of 4288 1668 2024-04-28_0ce89eb3eaa5d7525ab8b6d20654bdc8_bkransomware.exe CTS.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-04-28_0ce89eb3eaa5d7525ab8b6d20654bdc8_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-04-28_0ce89eb3eaa5d7525ab8b6d20654bdc8_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:\Users\Admin\AppData\Local\Temp\wjzyv5UDxOyA3C8.exeC:\Users\Admin\AppData\Local\Temp\wjzyv5UDxOyA3C8.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:\Users\Admin\AppData\Local\Microsoft\Office\16.0\excel.exe_Rules.xmlFilesize
392KB
MD52f5a22854e03cee0783231dd15110877
SHA104bf0cbc8c029c6b33c003d051b9745145611d96
SHA256e32774a9f353afca044a5544ee073662d805b62c86c46f098770e70cde50d153
SHA51240b6a6d685656201020ae8b0c44e7172f5b96c618469b9c785b1dc5bfaa571ead4ca303eebdc287f6e458d31d048ccc5159ac6d18c48d86db146fba36130025d
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C:\Users\Admin\AppData\Local\Temp\wjzyv5UDxOyA3C8.exeFilesize
25KB
MD5abbd49c180a2f8703f6306d6fa731fdc
SHA1d63f4bfe7f74936b2fbace803e3da6103fbf6586
SHA2565f411c0bd9ed9a42b0f07ed568c7d0cf358a83063b225a1f8f7da3296dde90f1
SHA512290dd984acc451b778f3db8c510bae7aec1d9547c3ad0a1829df731c136e4ecc9a37dc6a786cf8f1ecc4d14339aed1288af25055f450f6f953138c8d4d5c36e9
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C:\Windows\CTS.exeFilesize
71KB
MD5f9d4ab0a726adc9b5e4b7d7b724912f1
SHA13d42ca2098475924f70ee4a831c4f003b4682328
SHA256b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc
SHA51222a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432
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memory/456-10-0x0000000000400000-0x000000000040D000-memory.dmpFilesize
52KB