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Analysis
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max time kernel
57s -
max time network
40s -
platform
windows10-2004_x64 -
resource
win10v2004-20240419-en -
resource tags
arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system -
submitted
27/04/2024, 17:30
Static task
static1
Behavioral task
behavioral1
Sample
2024-04-27_8da2bf47e54a8858b398bf3a1dad5699_bkransomware.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-04-27_8da2bf47e54a8858b398bf3a1dad5699_bkransomware.exe
Resource
win10v2004-20240419-en
General
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Target
2024-04-27_8da2bf47e54a8858b398bf3a1dad5699_bkransomware.exe
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Size
71KB
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MD5
8da2bf47e54a8858b398bf3a1dad5699
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SHA1
089462b0f8137ee4759bc7dd6f046abe8f100dee
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SHA256
29fe12e4067f1c318ce95b5203736bcf4f5cb97c31b8079d89ded2afaa6cd216
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SHA512
edc11620530131037a02d66fe9092f70b4ed6e698ad048b765990c1f13634732a3106a570896a568e4aef3d5b0c15efb7318ac825271423f09bd418b20e69bd6
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SSDEEP
1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTEwV:ZhpAyazIlyazT7V
Malware Config
Signatures
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Executes dropped EXE 1 IoCs
pid Process 936 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
description ioc Process Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" 2024-04-27_8da2bf47e54a8858b398bf3a1dad5699_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 2024-04-27_8da2bf47e54a8858b398bf3a1dad5699_bkransomware.exe File created C:\Windows\CTS.exe CTS.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 4408 2024-04-27_8da2bf47e54a8858b398bf3a1dad5699_bkransomware.exe Token: SeDebugPrivilege 936 CTS.exe -
Suspicious use of WriteProcessMemory 3 IoCs
description pid Process procid_target PID 4408 wrote to memory of 936 4408 2024-04-27_8da2bf47e54a8858b398bf3a1dad5699_bkransomware.exe 85 PID 4408 wrote to memory of 936 4408 2024-04-27_8da2bf47e54a8858b398bf3a1dad5699_bkransomware.exe 85 PID 4408 wrote to memory of 936 4408 2024-04-27_8da2bf47e54a8858b398bf3a1dad5699_bkransomware.exe 85
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-04-27_8da2bf47e54a8858b398bf3a1dad5699_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-04-27_8da2bf47e54a8858b398bf3a1dad5699_bkransomware.exe"1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4408 -
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:936
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
392KB
MD5f39fdcdf055d78a9cdf6fc70daaf61c1
SHA1000693fa547aa7a5acc351ffd6a0333d307baada
SHA256641c09e183d33d0146ee0fadc3e76faece4e9f384d4a06137f3cccef48349621
SHA5124e18d763941250830f9f6d4798d683990ca24eba73b7bf1fcad5685cbc4513166fac888ec04c8e92bbcc49f2046eb1bb9c810340ac657821955351943842aef0
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Filesize
71KB
MD55a4041409bb46f29b496e7ecdfbc657d
SHA1caf5a45744287677499d643c950eae6298b96cf5
SHA256087a78af73efe0e8c7c5e607b572d63de461adc79a6eae7b3c3ea703dc9ef9bd
SHA5127271aa0296e2a6734a015811496c2e7086f6e4a69bea2ed699e31fad167ef753d1dc1e38eff9f46872ebd54ae05215030688d8a5ee23df05e9179905898a6404
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Filesize
71KB
MD566df4ffab62e674af2e75b163563fc0b
SHA1dec8a197312e41eeb3cfef01cb2a443f0205cd6e
SHA256075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163
SHA5121588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25