Analysis
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max time kernel
133s -
max time network
125s -
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 22:24
Static task
static1
Behavioral task
behavioral1
Sample
2024-05-24_1d7e25d50fc15e73ffd61cdcac7b0eb6_bkransomware.exe
Resource
win7-20240508-en
Behavioral task
behavioral2
Sample
2024-05-24_1d7e25d50fc15e73ffd61cdcac7b0eb6_bkransomware.exe
Resource
win10v2004-20240508-en
General
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Target
2024-05-24_1d7e25d50fc15e73ffd61cdcac7b0eb6_bkransomware.exe
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Size
96KB
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MD5
1d7e25d50fc15e73ffd61cdcac7b0eb6
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SHA1
ea4ed70069578706227b798ab6af265c1c18814d
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SHA256
7dae106cff9c4a1898bc36dac5328a13790c41d0026e0fc1c79fdee96ca01c1d
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SHA512
1d30df147db035021fd369d19c336d0f2bdf32d6589e8ef1df147ac39abc31536c6069eebc192c3b205825d9a1222ea34a508623c075581bcc6b8ce3ec073955
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SSDEEP
1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTWHsKy9SWAcWF2+PDm28n:ZRpAyazIliazTWMv9SWAcWF2YDm2g
Malware Config
Signatures
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Executes dropped EXE 2 IoCs
Processes:
tuF1ldDwuyveExU.exeCTS.exepid process 2680 tuF1ldDwuyveExU.exe 4592 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_1d7e25d50fc15e73ffd61cdcac7b0eb6_bkransomware.exeCTS.exedescription ioc process Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" 2024-05-24_1d7e25d50fc15e73ffd61cdcac7b0eb6_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_1d7e25d50fc15e73ffd61cdcac7b0eb6_bkransomware.exeCTS.exedescription ioc process File created C:\Windows\CTS.exe 2024-05-24_1d7e25d50fc15e73ffd61cdcac7b0eb6_bkransomware.exe File created C:\Windows\CTS.exe CTS.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
2024-05-24_1d7e25d50fc15e73ffd61cdcac7b0eb6_bkransomware.exeCTS.exedescription pid process Token: SeDebugPrivilege 212 2024-05-24_1d7e25d50fc15e73ffd61cdcac7b0eb6_bkransomware.exe Token: SeDebugPrivilege 4592 CTS.exe -
Suspicious use of WriteProcessMemory 5 IoCs
Processes:
2024-05-24_1d7e25d50fc15e73ffd61cdcac7b0eb6_bkransomware.exedescription pid process target process PID 212 wrote to memory of 2680 212 2024-05-24_1d7e25d50fc15e73ffd61cdcac7b0eb6_bkransomware.exe tuF1ldDwuyveExU.exe PID 212 wrote to memory of 2680 212 2024-05-24_1d7e25d50fc15e73ffd61cdcac7b0eb6_bkransomware.exe tuF1ldDwuyveExU.exe PID 212 wrote to memory of 4592 212 2024-05-24_1d7e25d50fc15e73ffd61cdcac7b0eb6_bkransomware.exe CTS.exe PID 212 wrote to memory of 4592 212 2024-05-24_1d7e25d50fc15e73ffd61cdcac7b0eb6_bkransomware.exe CTS.exe PID 212 wrote to memory of 4592 212 2024-05-24_1d7e25d50fc15e73ffd61cdcac7b0eb6_bkransomware.exe CTS.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-24_1d7e25d50fc15e73ffd61cdcac7b0eb6_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-24_1d7e25d50fc15e73ffd61cdcac7b0eb6_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\tuF1ldDwuyveExU.exeC:\Users\Admin\AppData\Local\Temp\tuF1ldDwuyveExU.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
393KB
MD5f8761d779da3fdf4c74e111a7007765e
SHA116fcb24407bdd166a24546e744e994b5c6876af8
SHA2568b52ba0620c1168ee5f0121f9a7d0b52fd09602f3da196ac33c4aa038f3bf9b9
SHA512057893f22b1dbf25b7e3b61f51f13e2d9871a76e8f8bb6204607a7d230ba82b17d9aafe74dab212868090d2403d89d1f94582c803c49e7e35b3345c4380e22bc
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C:\Users\Admin\AppData\Local\Temp\tuF1ldDwuyveExU.exeFilesize
25KB
MD5abbd49c180a2f8703f6306d6fa731fdc
SHA1d63f4bfe7f74936b2fbace803e3da6103fbf6586
SHA2565f411c0bd9ed9a42b0f07ed568c7d0cf358a83063b225a1f8f7da3296dde90f1
SHA512290dd984acc451b778f3db8c510bae7aec1d9547c3ad0a1829df731c136e4ecc9a37dc6a786cf8f1ecc4d14339aed1288af25055f450f6f953138c8d4d5c36e9
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C:\Windows\CTS.exeFilesize
71KB
MD5f9d4ab0a726adc9b5e4b7d7b724912f1
SHA13d42ca2098475924f70ee4a831c4f003b4682328
SHA256b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc
SHA51222a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432
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memory/2680-11-0x0000000000400000-0x000000000040D000-memory.dmpFilesize
52KB