Analysis
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max time kernel
66s -
max time network
54s -
platform
windows10-2004_x64 -
resource
win10v2004-20240419-en -
resource tags
arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system -
submitted
28-04-2024 05:07
Static task
static1
Behavioral task
behavioral1
Sample
2024-04-28_df8a39a0cc49414c2fe3c8f9488bae09_bkransomware.exe
Resource
win7-20231129-en
Behavioral task
behavioral2
Sample
2024-04-28_df8a39a0cc49414c2fe3c8f9488bae09_bkransomware.exe
Resource
win10v2004-20240419-en
General
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Target
2024-04-28_df8a39a0cc49414c2fe3c8f9488bae09_bkransomware.exe
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Size
96KB
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MD5
df8a39a0cc49414c2fe3c8f9488bae09
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SHA1
05451e1adf5351978d2843c9550ef21181914256
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SHA256
bdc88beb094f4d41fbb69e9b0e6a5799b3915f4c0fb1c843beffeb209b0a31ab
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SHA512
7f9ae4c610296f822a19be02622ddd11ba874881a2d8333e5a064ab714e36da6bd9e54b59ec50cb28d5aefb0db81a2966e2835e8cb335c4137a917dd6121fcaf
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SSDEEP
1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTBMxmEPwMcbxXqRFD:ZRpAyazIliazT2m4wMg+p
Malware Config
Signatures
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Executes dropped EXE 2 IoCs
Processes:
8QDIcEI9it4JCXZ.exeCTS.exepid process 3428 8QDIcEI9it4JCXZ.exe 2120 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_df8a39a0cc49414c2fe3c8f9488bae09_bkransomware.exeCTS.exedescription ioc process Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" 2024-04-28_df8a39a0cc49414c2fe3c8f9488bae09_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_df8a39a0cc49414c2fe3c8f9488bae09_bkransomware.exeCTS.exedescription ioc process File created C:\Windows\CTS.exe 2024-04-28_df8a39a0cc49414c2fe3c8f9488bae09_bkransomware.exe File created C:\Windows\CTS.exe CTS.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
2024-04-28_df8a39a0cc49414c2fe3c8f9488bae09_bkransomware.exeCTS.exedescription pid process Token: SeDebugPrivilege 3988 2024-04-28_df8a39a0cc49414c2fe3c8f9488bae09_bkransomware.exe Token: SeDebugPrivilege 2120 CTS.exe -
Suspicious use of WriteProcessMemory 5 IoCs
Processes:
2024-04-28_df8a39a0cc49414c2fe3c8f9488bae09_bkransomware.exedescription pid process target process PID 3988 wrote to memory of 3428 3988 2024-04-28_df8a39a0cc49414c2fe3c8f9488bae09_bkransomware.exe 8QDIcEI9it4JCXZ.exe PID 3988 wrote to memory of 3428 3988 2024-04-28_df8a39a0cc49414c2fe3c8f9488bae09_bkransomware.exe 8QDIcEI9it4JCXZ.exe PID 3988 wrote to memory of 2120 3988 2024-04-28_df8a39a0cc49414c2fe3c8f9488bae09_bkransomware.exe CTS.exe PID 3988 wrote to memory of 2120 3988 2024-04-28_df8a39a0cc49414c2fe3c8f9488bae09_bkransomware.exe CTS.exe PID 3988 wrote to memory of 2120 3988 2024-04-28_df8a39a0cc49414c2fe3c8f9488bae09_bkransomware.exe CTS.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-04-28_df8a39a0cc49414c2fe3c8f9488bae09_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-04-28_df8a39a0cc49414c2fe3c8f9488bae09_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\8QDIcEI9it4JCXZ.exeC:\Users\Admin\AppData\Local\Temp\8QDIcEI9it4JCXZ.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
394KB
MD5a62d650abec15c44efcc547268cf133f
SHA1d71e31bee7705a0944e927da92bbe3e1170494d9
SHA256003dc68dc596a2af024953a21371d2050906b5585b9ff613b22a5588b6e602a5
SHA512d3664782780ce858a72d7ee913fa5bed27a3c5f43e0ed3d021ee921846c52e96771f54f5686244fed14e8f224a73df1380aac3e27df39659d4066aaee336a69e
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C:\Users\Admin\AppData\Local\Temp\8QDIcEI9it4JCXZ.exeFilesize
25KB
MD5abbd49c180a2f8703f6306d6fa731fdc
SHA1d63f4bfe7f74936b2fbace803e3da6103fbf6586
SHA2565f411c0bd9ed9a42b0f07ed568c7d0cf358a83063b225a1f8f7da3296dde90f1
SHA512290dd984acc451b778f3db8c510bae7aec1d9547c3ad0a1829df731c136e4ecc9a37dc6a786cf8f1ecc4d14339aed1288af25055f450f6f953138c8d4d5c36e9
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C:\Windows\CTS.exeFilesize
71KB
MD5f9d4ab0a726adc9b5e4b7d7b724912f1
SHA13d42ca2098475924f70ee4a831c4f003b4682328
SHA256b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc
SHA51222a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432
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memory/3428-8-0x0000000000400000-0x000000000040D000-memory.dmpFilesize
52KB