Analysis
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max time kernel
93s -
max time network
95s -
platform
windows10-2004_x64 -
resource
win10v2004-20240426-en -
resource tags
arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system -
submitted
03-06-2024 09:43
Static task
static1
Behavioral task
behavioral1
Sample
2024-06-03_6d9c1457f7c1e8371f2b19578cebe8b5_bkransomware.exe
Resource
win7-20240508-en
Behavioral task
behavioral2
Sample
2024-06-03_6d9c1457f7c1e8371f2b19578cebe8b5_bkransomware.exe
Resource
win10v2004-20240426-en
General
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Target
2024-06-03_6d9c1457f7c1e8371f2b19578cebe8b5_bkransomware.exe
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Size
96KB
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MD5
6d9c1457f7c1e8371f2b19578cebe8b5
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SHA1
16fe2bf152a52c52d929f0edafb38b415faa96ef
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SHA256
4a20e45e5ef46d57e041253c50cd001e354a1b793f64f072c6a005ab9d886046
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SHA512
fb80c64da8166c52db985a69fd04501be7e7e71968d4dfee976865150ad7bc12d7f8f663ebe65aeb4fb62fff3e6dec2cc3f21ca3ef467659f41956f9e2d5990d
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SSDEEP
1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTndpaf5tPKDz+CjMjJ0Tlc:ZRpAyazIliazTndp05tSDiJf
Malware Config
Signatures
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Executes dropped EXE 2 IoCs
Processes:
lGZ7t0gXRICUXUW.exeCTS.exepid process 3348 lGZ7t0gXRICUXUW.exe 1504 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:
2024-06-03_6d9c1457f7c1e8371f2b19578cebe8b5_bkransomware.exeCTS.exedescription ioc process Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" 2024-06-03_6d9c1457f7c1e8371f2b19578cebe8b5_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:
2024-06-03_6d9c1457f7c1e8371f2b19578cebe8b5_bkransomware.exeCTS.exedescription ioc process File created C:\Windows\CTS.exe 2024-06-03_6d9c1457f7c1e8371f2b19578cebe8b5_bkransomware.exe File created C:\Windows\CTS.exe CTS.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
2024-06-03_6d9c1457f7c1e8371f2b19578cebe8b5_bkransomware.exeCTS.exedescription pid process Token: SeDebugPrivilege 3380 2024-06-03_6d9c1457f7c1e8371f2b19578cebe8b5_bkransomware.exe Token: SeDebugPrivilege 1504 CTS.exe -
Suspicious use of WriteProcessMemory 5 IoCs
Processes:
2024-06-03_6d9c1457f7c1e8371f2b19578cebe8b5_bkransomware.exedescription pid process target process PID 3380 wrote to memory of 3348 3380 2024-06-03_6d9c1457f7c1e8371f2b19578cebe8b5_bkransomware.exe lGZ7t0gXRICUXUW.exe PID 3380 wrote to memory of 3348 3380 2024-06-03_6d9c1457f7c1e8371f2b19578cebe8b5_bkransomware.exe lGZ7t0gXRICUXUW.exe PID 3380 wrote to memory of 1504 3380 2024-06-03_6d9c1457f7c1e8371f2b19578cebe8b5_bkransomware.exe CTS.exe PID 3380 wrote to memory of 1504 3380 2024-06-03_6d9c1457f7c1e8371f2b19578cebe8b5_bkransomware.exe CTS.exe PID 3380 wrote to memory of 1504 3380 2024-06-03_6d9c1457f7c1e8371f2b19578cebe8b5_bkransomware.exe CTS.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-06-03_6d9c1457f7c1e8371f2b19578cebe8b5_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-03_6d9c1457f7c1e8371f2b19578cebe8b5_bkransomware.exe"1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3380 -
C:\Users\Admin\AppData\Local\Temp\lGZ7t0gXRICUXUW.exeC:\Users\Admin\AppData\Local\Temp\lGZ7t0gXRICUXUW.exe2⤵
- Executes dropped EXE
PID:3348 -
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
PID:1504
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
395KB
MD5adb495468b58fddef96de2e3d97264d6
SHA1edb9c5af966998970ef9cc0473df75e58b45906e
SHA2563ffff17ff14e5841e635aa9e6376d123b94f7a21c25ac94aef892f2c837390c4
SHA512f1a349c20899b6c059d43caf0d9356d2c39e5ce180505d480183ce7dc0327d24044e071c37fc00b1b6d70355ae23db548fcea20bfd611638a2b2475ddd4f91ee
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Filesize
25KB
MD5abbd49c180a2f8703f6306d6fa731fdc
SHA1d63f4bfe7f74936b2fbace803e3da6103fbf6586
SHA2565f411c0bd9ed9a42b0f07ed568c7d0cf358a83063b225a1f8f7da3296dde90f1
SHA512290dd984acc451b778f3db8c510bae7aec1d9547c3ad0a1829df731c136e4ecc9a37dc6a786cf8f1ecc4d14339aed1288af25055f450f6f953138c8d4d5c36e9
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Filesize
71KB
MD5f9d4ab0a726adc9b5e4b7d7b724912f1
SHA13d42ca2098475924f70ee4a831c4f003b4682328
SHA256b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc
SHA51222a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432