Analysis
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max time kernel
93s -
max time network
94s -
platform
windows10-2004_x64 -
resource
win10v2004-20240426-en -
resource tags
arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system -
submitted
28-04-2024 03:23
Static task
static1
Behavioral task
behavioral1
Sample
2024-04-28_0e212a11c6b12c052d0f57e005222243_bkransomware.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-04-28_0e212a11c6b12c052d0f57e005222243_bkransomware.exe
Resource
win10v2004-20240426-en
General
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Target
2024-04-28_0e212a11c6b12c052d0f57e005222243_bkransomware.exe
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Size
96KB
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MD5
0e212a11c6b12c052d0f57e005222243
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SHA1
da5144bb70b9660f0714619ceffe2f2d514de92e
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SHA256
56109bb5d2409532d9e862fcd21448519ea752530e55576a48e2ceaa1648c599
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SHA512
ecb5bb9db8385c7dbc7ed5db959f1afcca01abacdd9c7c84c96b3f142f23dc48746a94e0bd24724231f80ab8ce9fe73d2dd986f8c71e6d2c98a058421467ce64
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SSDEEP
1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTNmgGeVD/WcX16Z:ZRpAyazIliazTNmgl+Co
Malware Config
Signatures
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Executes dropped EXE 2 IoCs
Processes:
IDBOpGVYyWxekQL.exeCTS.exepid process 64 IDBOpGVYyWxekQL.exe 3344 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:
2024-04-28_0e212a11c6b12c052d0f57e005222243_bkransomware.exeCTS.exedescription ioc process Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" 2024-04-28_0e212a11c6b12c052d0f57e005222243_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:
2024-04-28_0e212a11c6b12c052d0f57e005222243_bkransomware.exeCTS.exedescription ioc process File created C:\Windows\CTS.exe 2024-04-28_0e212a11c6b12c052d0f57e005222243_bkransomware.exe File created C:\Windows\CTS.exe CTS.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
2024-04-28_0e212a11c6b12c052d0f57e005222243_bkransomware.exeCTS.exedescription pid process Token: SeDebugPrivilege 1032 2024-04-28_0e212a11c6b12c052d0f57e005222243_bkransomware.exe Token: SeDebugPrivilege 3344 CTS.exe -
Suspicious use of WriteProcessMemory 5 IoCs
Processes:
2024-04-28_0e212a11c6b12c052d0f57e005222243_bkransomware.exedescription pid process target process PID 1032 wrote to memory of 64 1032 2024-04-28_0e212a11c6b12c052d0f57e005222243_bkransomware.exe IDBOpGVYyWxekQL.exe PID 1032 wrote to memory of 64 1032 2024-04-28_0e212a11c6b12c052d0f57e005222243_bkransomware.exe IDBOpGVYyWxekQL.exe PID 1032 wrote to memory of 3344 1032 2024-04-28_0e212a11c6b12c052d0f57e005222243_bkransomware.exe CTS.exe PID 1032 wrote to memory of 3344 1032 2024-04-28_0e212a11c6b12c052d0f57e005222243_bkransomware.exe CTS.exe PID 1032 wrote to memory of 3344 1032 2024-04-28_0e212a11c6b12c052d0f57e005222243_bkransomware.exe CTS.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-04-28_0e212a11c6b12c052d0f57e005222243_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-04-28_0e212a11c6b12c052d0f57e005222243_bkransomware.exe"1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1032 -
C:\Users\Admin\AppData\Local\Temp\IDBOpGVYyWxekQL.exeC:\Users\Admin\AppData\Local\Temp\IDBOpGVYyWxekQL.exe2⤵
- Executes dropped EXE
PID:64 -
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:3344
Network
MITRE ATT&CK Enterprise v15
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
MD5e8b73c1120974520f34bc092a9b86b19
SHA17e1f30b14a4401e1b3b5f025d38c00eed56aeff4
SHA256fd86385463af437b26c205b1b55c93b888a6b17fd160504351079f98f40f01e3
SHA512e7c128141e282865a8b4de8d5dfa29695f756a61ffbc17ceaff675fb52da8e81ff37f6cf138a9386eaf05785e55bf09eb17cdd94f14576330b8cbe050817bd09
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C:\Users\Admin\AppData\Local\Temp\IDBOpGVYyWxekQL.exeFilesize
25KB
MD5abbd49c180a2f8703f6306d6fa731fdc
SHA1d63f4bfe7f74936b2fbace803e3da6103fbf6586
SHA2565f411c0bd9ed9a42b0f07ed568c7d0cf358a83063b225a1f8f7da3296dde90f1
SHA512290dd984acc451b778f3db8c510bae7aec1d9547c3ad0a1829df731c136e4ecc9a37dc6a786cf8f1ecc4d14339aed1288af25055f450f6f953138c8d4d5c36e9
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C:\Windows\CTS.exeFilesize
71KB
MD5f9d4ab0a726adc9b5e4b7d7b724912f1
SHA13d42ca2098475924f70ee4a831c4f003b4682328
SHA256b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc
SHA51222a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432
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memory/64-8-0x0000000000400000-0x000000000040D000-memory.dmpFilesize
52KB