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Analysis
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max time kernel
133s -
max time network
126s -
platform
windows10-2004_x64 -
resource
win10v2004-20240508-en -
resource tags
arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system -
submitted
24/05/2024, 09:04
Static task
static1
Behavioral task
behavioral1
Sample
2024-05-24_0602adffa199c4db6b7033938771df93_bkransomware.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-05-24_0602adffa199c4db6b7033938771df93_bkransomware.exe
Resource
win10v2004-20240508-en
General
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Target
2024-05-24_0602adffa199c4db6b7033938771df93_bkransomware.exe
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Size
233KB
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MD5
0602adffa199c4db6b7033938771df93
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SHA1
2f755f123490cf6c71f551ee63fb8dea660607f6
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SHA256
d9dfdc2f41479782868e7329e988f5731ad7449c96ec2fbbaa5e6a058d424d73
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SHA512
783b77b541c5b09c85354daf2bd4c1a7f4d89026431b8db52c5684cde7c7ff4439d2b522927106c984a7bc3b09a27671cef5ef44346a88c2c54751dce08e1844
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SSDEEP
6144:xZ8az3eGPlZlJIuGlJTCv4m/37aZFx1JQzrcno63OciypJ:xC0uGPXv8Cv4m/LaZFNYxIOcNJ
Malware Config
Signatures
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Executes dropped EXE 1 IoCs
pid Process 5044 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" CTS.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" 2024-05-24_0602adffa199c4db6b7033938771df93_bkransomware.exe -
Drops file in Windows directory 2 IoCs
description ioc Process File created C:\Windows\CTS.exe 2024-05-24_0602adffa199c4db6b7033938771df93_bkransomware.exe File created C:\Windows\CTS.exe CTS.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 4616 2024-05-24_0602adffa199c4db6b7033938771df93_bkransomware.exe Token: SeDebugPrivilege 5044 CTS.exe -
Suspicious use of WriteProcessMemory 3 IoCs
description pid Process procid_target PID 4616 wrote to memory of 5044 4616 2024-05-24_0602adffa199c4db6b7033938771df93_bkransomware.exe 91 PID 4616 wrote to memory of 5044 4616 2024-05-24_0602adffa199c4db6b7033938771df93_bkransomware.exe 91 PID 4616 wrote to memory of 5044 4616 2024-05-24_0602adffa199c4db6b7033938771df93_bkransomware.exe 91
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-24_0602adffa199c4db6b7033938771df93_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-24_0602adffa199c4db6b7033938771df93_bkransomware.exe"1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4616 -
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:5044
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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 --field-trial-handle=1288,i,11746347647270949551,7786733067759450703,262144 --variations-seed-version --mojo-platform-channel-handle=3940 /prefetch:81⤵PID:2500
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
394KB
MD5fd54ebc42e81e19adf928edd9e92685c
SHA16d6a7a10569a56a045e6b9d5f3f323c2221978a9
SHA256c16508b5a276c205cbca78b8d66518aae4a31661c4e5c850ec14c022c1f6b55d
SHA5123c899b57c0ea4a191bc0f8eb295bb6b72527f22310ef58ecb38272aab643fc85734bdd33d578fd345e56df647db9479e4828d7829cf7715cc448fbf2b92b732e
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Filesize
233KB
MD5a7d6ae40dc69a0c5c6bbba05420b68a4
SHA1e06bab6db0f20ce0410d29b5cab395d758c2d19f
SHA2567727bed72d0896cce49d3868767d63b9d7fe04a13aad11f207ea9fb42a523278
SHA512991e6f43e8bfd3212e26bc3eb63b2b57d5e1ef90d829a2053acbd205eb9e0e732ed47bb2165d5bf25e08e9d3d17b27b3dd44bbfe9c3778682ac780d8418018b5
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Filesize
71KB
MD5f9d4ab0a726adc9b5e4b7d7b724912f1
SHA13d42ca2098475924f70ee4a831c4f003b4682328
SHA256b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc
SHA51222a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432