Analysis
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max time kernel
140s -
max time network
151s -
platform
windows10-2004_x64 -
resource
win10v2004-20240226-en -
resource tags
arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system -
submitted
27-05-2024 06:37
Static task
static1
Behavioral task
behavioral1
Sample
2024-05-27_c0c598aceae8d06e892a47c8056c8ad4_bkransomware.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-05-27_c0c598aceae8d06e892a47c8056c8ad4_bkransomware.exe
Resource
win10v2004-20240226-en
General
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Target
2024-05-27_c0c598aceae8d06e892a47c8056c8ad4_bkransomware.exe
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Size
96KB
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MD5
c0c598aceae8d06e892a47c8056c8ad4
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SHA1
339870a1e87f05510bb5d44c9b039b18fc68d319
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SHA256
bfd00f803592837bc3c97488b5dfe4945d8fd7be3400c1edc1d54d9fa5fd800e
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SHA512
4c6f7be6ef532e5e07cb0fc1d3279ab6da2a777f94ae398f3ab411d7c3288050075fd531d6d332848b0b649835ff1d70bac8d2726c77718c99bf4074fc443894
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SSDEEP
1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazT23Yf8YrStkFneIJ1PU51:ZRpAyazIliazTsYf8YrmkJeIJ1UH
Malware Config
Signatures
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Executes dropped EXE 2 IoCs
Processes:
uQocr1c4y54RtRb.exeCTS.exepid process 5012 uQocr1c4y54RtRb.exe 820 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:
2024-05-27_c0c598aceae8d06e892a47c8056c8ad4_bkransomware.exeCTS.exedescription ioc process Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" 2024-05-27_c0c598aceae8d06e892a47c8056c8ad4_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:
2024-05-27_c0c598aceae8d06e892a47c8056c8ad4_bkransomware.exeCTS.exedescription ioc process File created C:\Windows\CTS.exe 2024-05-27_c0c598aceae8d06e892a47c8056c8ad4_bkransomware.exe File created C:\Windows\CTS.exe CTS.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
2024-05-27_c0c598aceae8d06e892a47c8056c8ad4_bkransomware.exeCTS.exedescription pid process Token: SeDebugPrivilege 2132 2024-05-27_c0c598aceae8d06e892a47c8056c8ad4_bkransomware.exe Token: SeDebugPrivilege 820 CTS.exe -
Suspicious use of WriteProcessMemory 5 IoCs
Processes:
2024-05-27_c0c598aceae8d06e892a47c8056c8ad4_bkransomware.exedescription pid process target process PID 2132 wrote to memory of 5012 2132 2024-05-27_c0c598aceae8d06e892a47c8056c8ad4_bkransomware.exe uQocr1c4y54RtRb.exe PID 2132 wrote to memory of 5012 2132 2024-05-27_c0c598aceae8d06e892a47c8056c8ad4_bkransomware.exe uQocr1c4y54RtRb.exe PID 2132 wrote to memory of 820 2132 2024-05-27_c0c598aceae8d06e892a47c8056c8ad4_bkransomware.exe CTS.exe PID 2132 wrote to memory of 820 2132 2024-05-27_c0c598aceae8d06e892a47c8056c8ad4_bkransomware.exe CTS.exe PID 2132 wrote to memory of 820 2132 2024-05-27_c0c598aceae8d06e892a47c8056c8ad4_bkransomware.exe CTS.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-27_c0c598aceae8d06e892a47c8056c8ad4_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-27_c0c598aceae8d06e892a47c8056c8ad4_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\uQocr1c4y54RtRb.exeC:\Users\Admin\AppData\Local\Temp\uQocr1c4y54RtRb.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
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C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=4036 --field-trial-handle=2676,i,447940133669489189,1353734109898858672,262144 --variations-seed-version /prefetch:81⤵
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
789KB
MD599ac15e2251bd76c79350051b0f17c28
SHA1dfcbd589b9eaa5b8e01af7816efc410c615f9b3c
SHA256c06a2c45e13fa36b8c4d4c1beecfbe0f260ec66ed534b4bca5aa5b5567781a69
SHA512b757ebcc9bb4cf8d0a1eae77f7d5da1fa3a968f00ad16b6b640bae68edf22e964c54b915c672664d9d15bd2c561737b59f06855533187f77f70a70702ae0fa15
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C:\Users\Admin\AppData\Local\Temp\uQocr1c4y54RtRb.exeFilesize
25KB
MD5abbd49c180a2f8703f6306d6fa731fdc
SHA1d63f4bfe7f74936b2fbace803e3da6103fbf6586
SHA2565f411c0bd9ed9a42b0f07ed568c7d0cf358a83063b225a1f8f7da3296dde90f1
SHA512290dd984acc451b778f3db8c510bae7aec1d9547c3ad0a1829df731c136e4ecc9a37dc6a786cf8f1ecc4d14339aed1288af25055f450f6f953138c8d4d5c36e9
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C:\Windows\CTS.exeFilesize
71KB
MD5f9d4ab0a726adc9b5e4b7d7b724912f1
SHA13d42ca2098475924f70ee4a831c4f003b4682328
SHA256b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc
SHA51222a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432
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memory/5012-8-0x0000000000400000-0x000000000040D000-memory.dmpFilesize
52KB