Analysis
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max time kernel
150s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20240426-en -
resource tags
arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system -
submitted
24-05-2024 14:54
Static task
static1
Behavioral task
behavioral1
Sample
2024-05-24_7e65099ac2021e34cdc06f76bac9071b_bkransomware.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-05-24_7e65099ac2021e34cdc06f76bac9071b_bkransomware.exe
Resource
win10v2004-20240426-en
General
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Target
2024-05-24_7e65099ac2021e34cdc06f76bac9071b_bkransomware.exe
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Size
71KB
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MD5
7e65099ac2021e34cdc06f76bac9071b
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SHA1
8a7f6359b6782c910f796ff6c8f55565e921d766
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SHA256
4d8983237a587bdcae132fe75def12d736c8bf415bb17e8ea8958a8e13fe421e
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SHA512
e6950dc32ef9344e92437f051fe2fa9baea64156979703b29c30dc343b9570a5c9369b5a94664982ed6eec84f28924dc16d6135e376740d36060681bd7401dfe
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SSDEEP
1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTI:ZRpAyazIliazTI
Malware Config
Signatures
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Executes dropped EXE 1 IoCs
Processes:
CTS.exepid process 5076 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_7e65099ac2021e34cdc06f76bac9071b_bkransomware.exeCTS.exedescription ioc process Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" 2024-05-24_7e65099ac2021e34cdc06f76bac9071b_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_7e65099ac2021e34cdc06f76bac9071b_bkransomware.exeCTS.exedescription ioc process File created C:\Windows\CTS.exe 2024-05-24_7e65099ac2021e34cdc06f76bac9071b_bkransomware.exe File created C:\Windows\CTS.exe CTS.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
2024-05-24_7e65099ac2021e34cdc06f76bac9071b_bkransomware.exeCTS.exedescription pid process Token: SeDebugPrivilege 3000 2024-05-24_7e65099ac2021e34cdc06f76bac9071b_bkransomware.exe Token: SeDebugPrivilege 5076 CTS.exe -
Suspicious use of WriteProcessMemory 3 IoCs
Processes:
2024-05-24_7e65099ac2021e34cdc06f76bac9071b_bkransomware.exedescription pid process target process PID 3000 wrote to memory of 5076 3000 2024-05-24_7e65099ac2021e34cdc06f76bac9071b_bkransomware.exe CTS.exe PID 3000 wrote to memory of 5076 3000 2024-05-24_7e65099ac2021e34cdc06f76bac9071b_bkransomware.exe CTS.exe PID 3000 wrote to memory of 5076 3000 2024-05-24_7e65099ac2021e34cdc06f76bac9071b_bkransomware.exe CTS.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-24_7e65099ac2021e34cdc06f76bac9071b_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-24_7e65099ac2021e34cdc06f76bac9071b_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:\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
392KB
MD5a0fe33bc14731e78d64176d7a444f23d
SHA1018aca06886fc8381b0ef1036a37eef53d497dca
SHA25609be434ce89bbd0d6bcb01aa17ec501857ae76d2a54711b546ef4077861830ed
SHA512aca79f7a95cead7789490e49e8e26f2cc8b2d5df26819b76ec6e919e247e828851f88cb8144a15625a4c46e03ff84497eff29e9673564924159d5ffc1097a77f
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C:\Users\Admin\AppData\Local\Temp\gbUCX8Rr40hJDX5.exeFilesize
71KB
MD521a4d078812711e1873d92cfd4f3a0d6
SHA1800c1990d61ddb0bfe8e8e6efcdc6a42591a4a39
SHA2566f8becec96b60c740c3534c242f55f226325a1d87f92533227e2e2fa27d0b9fc
SHA512e8cbc21be54873f92ff2e4737068634c6690326dcce68f8e9dca4c71ca2eef6044dd9cdf58a0f9b643b4c6e1ddb8c55ea7afccccbd4c4c17d2720a6ecc632b28
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C:\Windows\CTS.exeFilesize
71KB
MD5f9d4ab0a726adc9b5e4b7d7b724912f1
SHA13d42ca2098475924f70ee4a831c4f003b4682328
SHA256b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc
SHA51222a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432