Analysis
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max time kernel
95s -
max time network
124s -
platform
windows10-2004_x64 -
resource
win10v2004-20240426-en -
resource tags
arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system -
submitted
08/06/2024, 20:33
Static task
static1
Behavioral task
behavioral1
Sample
2024-06-08_490cc71f335c60d7e0655c8258dba016_bkransomware.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-06-08_490cc71f335c60d7e0655c8258dba016_bkransomware.exe
Resource
win10v2004-20240426-en
General
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Target
2024-06-08_490cc71f335c60d7e0655c8258dba016_bkransomware.exe
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Size
71KB
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MD5
490cc71f335c60d7e0655c8258dba016
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SHA1
41d67dccb05c9baeb4b9bdc6263ad1b2a1caee77
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SHA256
ab0f890a4d3ebd0611f77ff7018453eac882a131a815b68798f73ff45d5c4fa3
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SHA512
32e6bb4c1644881b326b7e2eba921e101c7472a5533edc8372e9a18c804fb1c9272958e2b88baa7f3cc88ea864dce4b8c61d6645d76dda70dbd985f66656824f
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SSDEEP
1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazT7:ZRpAyazIliazT7
Malware Config
Signatures
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Executes dropped EXE 1 IoCs
pid Process 1692 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" 2024-06-08_490cc71f335c60d7e0655c8258dba016_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 2024-06-08_490cc71f335c60d7e0655c8258dba016_bkransomware.exe File created C:\Windows\CTS.exe CTS.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 2324 2024-06-08_490cc71f335c60d7e0655c8258dba016_bkransomware.exe Token: SeDebugPrivilege 1692 CTS.exe -
Suspicious use of WriteProcessMemory 3 IoCs
description pid Process procid_target PID 2324 wrote to memory of 1692 2324 2024-06-08_490cc71f335c60d7e0655c8258dba016_bkransomware.exe 81 PID 2324 wrote to memory of 1692 2324 2024-06-08_490cc71f335c60d7e0655c8258dba016_bkransomware.exe 81 PID 2324 wrote to memory of 1692 2324 2024-06-08_490cc71f335c60d7e0655c8258dba016_bkransomware.exe 81
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-06-08_490cc71f335c60d7e0655c8258dba016_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-08_490cc71f335c60d7e0655c8258dba016_bkransomware.exe"1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2324 -
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:1692
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
394KB
MD5943cdd802b2f6ef59efdb08624c42e60
SHA1b686995f022711c56a81f10a771730871a9d83dd
SHA256a2cc877ead25628e93d41909f8f5cc1e2a1bd1e35df734d53655206c8e34d8d3
SHA5128f8b8e1d9a54926e67a23553820e7f9f20f895e40924ca003b0a1361eee5a627b201985456279b6d91239e8c8b5e0d8f5df1f824fdf047265fb098704ba918db
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Filesize
71KB
MD5fdfc604ac6340c19f4a59d8ee2610017
SHA15397e6a29fde3a1856c1a06d17444b17f6b74cb7
SHA256c6ad9dc281d1ab8fd6f75f5491c43a557612d022873d2e0edbae823dc7d02505
SHA512d7224a7972b53286d0ebab0c48cc39f832363772d5d43ccd6fdeee9e282db3cc13af5ff8d2cc6ecb84e6c9e926141d4074507b30a8f799054d4d70fd49211492
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Filesize
71KB
MD5f9d4ab0a726adc9b5e4b7d7b724912f1
SHA13d42ca2098475924f70ee4a831c4f003b4682328
SHA256b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc
SHA51222a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432