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Analysis
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max time kernel
121s -
max time network
123s -
platform
windows7_x64 -
resource
win7-20240708-en -
resource tags
arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system -
submitted
04/10/2024, 22:23
Static task
static1
Behavioral task
behavioral1
Sample
2024-10-04_0fbd5c3dc60fa07a407eb8d70d9fe6d5_bkransomware.exe
Resource
win7-20240708-en
Behavioral task
behavioral2
Sample
2024-10-04_0fbd5c3dc60fa07a407eb8d70d9fe6d5_bkransomware.exe
Resource
win10v2004-20240802-en
General
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Target
2024-10-04_0fbd5c3dc60fa07a407eb8d70d9fe6d5_bkransomware.exe
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Size
96KB
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MD5
0fbd5c3dc60fa07a407eb8d70d9fe6d5
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SHA1
a91f2aab5c43164e2e32584c3f013381642e0624
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SHA256
88b342402c136ce00e10531f4eeffd533fe8437acdf56a64f8da1e4ed46559c6
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SHA512
778c1dc1e6e8560c399d9e4bc9b047215717cac2e0b221a86fe871b00d147f9a70287d868a30351327f44e9df66b90d054c084b2fa5a5273e5497eff18742a74
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SSDEEP
1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTMRpAhc+3NOPrXqQllw:ZhpAyazIlyazTMRNrXqQle
Malware Config
Signatures
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Executes dropped EXE 2 IoCs
pid Process 2404 4hpGvO42hj5zStm.exe 2160 CTS.exe -
Loads dropped DLL 3 IoCs
pid Process 2368 2024-10-04_0fbd5c3dc60fa07a407eb8d70d9fe6d5_bkransomware.exe 2368 2024-10-04_0fbd5c3dc60fa07a407eb8d70d9fe6d5_bkransomware.exe 2168 Process not Found -
Reads user/profile data of web browsers 3 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
description ioc Process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" 2024-10-04_0fbd5c3dc60fa07a407eb8d70d9fe6d5_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
description ioc Process File created C:\Windows\CTS.exe 2024-10-04_0fbd5c3dc60fa07a407eb8d70d9fe6d5_bkransomware.exe File created C:\Windows\CTS.exe CTS.exe -
System Location Discovery: System Language Discovery 1 TTPs 1 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
description ioc Process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language 2024-10-04_0fbd5c3dc60fa07a407eb8d70d9fe6d5_bkransomware.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 2368 2024-10-04_0fbd5c3dc60fa07a407eb8d70d9fe6d5_bkransomware.exe Token: SeDebugPrivilege 2160 CTS.exe -
Suspicious use of WriteProcessMemory 8 IoCs
description pid Process procid_target PID 2368 wrote to memory of 2404 2368 2024-10-04_0fbd5c3dc60fa07a407eb8d70d9fe6d5_bkransomware.exe 30 PID 2368 wrote to memory of 2404 2368 2024-10-04_0fbd5c3dc60fa07a407eb8d70d9fe6d5_bkransomware.exe 30 PID 2368 wrote to memory of 2404 2368 2024-10-04_0fbd5c3dc60fa07a407eb8d70d9fe6d5_bkransomware.exe 30 PID 2368 wrote to memory of 2404 2368 2024-10-04_0fbd5c3dc60fa07a407eb8d70d9fe6d5_bkransomware.exe 30 PID 2368 wrote to memory of 2160 2368 2024-10-04_0fbd5c3dc60fa07a407eb8d70d9fe6d5_bkransomware.exe 32 PID 2368 wrote to memory of 2160 2368 2024-10-04_0fbd5c3dc60fa07a407eb8d70d9fe6d5_bkransomware.exe 32 PID 2368 wrote to memory of 2160 2368 2024-10-04_0fbd5c3dc60fa07a407eb8d70d9fe6d5_bkransomware.exe 32 PID 2368 wrote to memory of 2160 2368 2024-10-04_0fbd5c3dc60fa07a407eb8d70d9fe6d5_bkransomware.exe 32
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-10-04_0fbd5c3dc60fa07a407eb8d70d9fe6d5_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-10-04_0fbd5c3dc60fa07a407eb8d70d9fe6d5_bkransomware.exe"1⤵
- Loads dropped DLL
- Adds Run key to start application
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2368 -
C:\Users\Admin\AppData\Local\Temp\4hpGvO42hj5zStm.exeC:\Users\Admin\AppData\Local\Temp\4hpGvO42hj5zStm.exe2⤵
- Executes dropped EXE
PID:2404
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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
PID:2160
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
71KB
MD566df4ffab62e674af2e75b163563fc0b
SHA1dec8a197312e41eeb3cfef01cb2a443f0205cd6e
SHA256075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163
SHA5121588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25
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Filesize
25KB
MD5abbd49c180a2f8703f6306d6fa731fdc
SHA1d63f4bfe7f74936b2fbace803e3da6103fbf6586
SHA2565f411c0bd9ed9a42b0f07ed568c7d0cf358a83063b225a1f8f7da3296dde90f1
SHA512290dd984acc451b778f3db8c510bae7aec1d9547c3ad0a1829df731c136e4ecc9a37dc6a786cf8f1ecc4d14339aed1288af25055f450f6f953138c8d4d5c36e9