Analysis
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max time kernel
120s -
max time network
121s -
platform
windows7_x64 -
resource
win7-20240419-en -
resource tags
arch:x64arch:x86image:win7-20240419-enlocale:en-usos:windows7-x64system -
submitted
28/04/2024, 10:09
Static task
static1
Behavioral task
behavioral1
Sample
2024-04-28_f826928418350daed0959b6fe5837208_bkransomware.exe
Resource
win7-20240419-en
Behavioral task
behavioral2
Sample
2024-04-28_f826928418350daed0959b6fe5837208_bkransomware.exe
Resource
win10v2004-20240426-en
General
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Target
2024-04-28_f826928418350daed0959b6fe5837208_bkransomware.exe
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Size
11.8MB
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MD5
f826928418350daed0959b6fe5837208
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SHA1
5a56cdc748dfb2ba91859f47e7e105ac36fe4654
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SHA256
4793380fe37d83f037465b6af4f0d3505679aab76ebe919e49e7eb2a43ec4f2c
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SHA512
b7df8ceb0a66bcace5c5d912c19528c25a9742d956b7744fd733adeccb1d48fa22d7d5f60030356384e435cdb8cdd75e1523afd54707792107a728a1ac0b8f88
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SSDEEP
196608:h+cpkunept7RjSs9B3XpknY7RU1v5mifvMx3hhF3h8TtHeEGCnhGMwL/drW:h+cpzneprzjZr8pfwdaBevMwL/JW
Malware Config
Signatures
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Executes dropped EXE 2 IoCs
pid Process 3016 0gZ4LxOTZhtAJjH.exe 2112 CTS.exe -
Loads dropped DLL 5 IoCs
pid Process 2748 2024-04-28_f826928418350daed0959b6fe5837208_bkransomware.exe 3016 0gZ4LxOTZhtAJjH.exe 3016 0gZ4LxOTZhtAJjH.exe 3016 0gZ4LxOTZhtAJjH.exe 3016 0gZ4LxOTZhtAJjH.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" 2024-04-28_f826928418350daed0959b6fe5837208_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 2024-04-28_f826928418350daed0959b6fe5837208_bkransomware.exe File created C:\Windows\CTS.exe CTS.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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NSIS installer 2 IoCs
resource yara_rule behavioral1/files/0x000b000000012279-1.dat nsis_installer_1 behavioral1/files/0x000b000000012279-1.dat nsis_installer_2 -
Suspicious behavior: GetForegroundWindowSpam 1 IoCs
pid Process 3016 0gZ4LxOTZhtAJjH.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 2748 2024-04-28_f826928418350daed0959b6fe5837208_bkransomware.exe Token: SeDebugPrivilege 2112 CTS.exe -
Suspicious use of WriteProcessMemory 11 IoCs
description pid Process procid_target PID 2748 wrote to memory of 3016 2748 2024-04-28_f826928418350daed0959b6fe5837208_bkransomware.exe 28 PID 2748 wrote to memory of 3016 2748 2024-04-28_f826928418350daed0959b6fe5837208_bkransomware.exe 28 PID 2748 wrote to memory of 3016 2748 2024-04-28_f826928418350daed0959b6fe5837208_bkransomware.exe 28 PID 2748 wrote to memory of 3016 2748 2024-04-28_f826928418350daed0959b6fe5837208_bkransomware.exe 28 PID 2748 wrote to memory of 3016 2748 2024-04-28_f826928418350daed0959b6fe5837208_bkransomware.exe 28 PID 2748 wrote to memory of 3016 2748 2024-04-28_f826928418350daed0959b6fe5837208_bkransomware.exe 28 PID 2748 wrote to memory of 3016 2748 2024-04-28_f826928418350daed0959b6fe5837208_bkransomware.exe 28 PID 2748 wrote to memory of 2112 2748 2024-04-28_f826928418350daed0959b6fe5837208_bkransomware.exe 29 PID 2748 wrote to memory of 2112 2748 2024-04-28_f826928418350daed0959b6fe5837208_bkransomware.exe 29 PID 2748 wrote to memory of 2112 2748 2024-04-28_f826928418350daed0959b6fe5837208_bkransomware.exe 29 PID 2748 wrote to memory of 2112 2748 2024-04-28_f826928418350daed0959b6fe5837208_bkransomware.exe 29
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-04-28_f826928418350daed0959b6fe5837208_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-04-28_f826928418350daed0959b6fe5837208_bkransomware.exe"1⤵
- Loads dropped DLL
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2748 -
C:\Users\Admin\AppData\Local\Temp\0gZ4LxOTZhtAJjH.exeC:\Users\Admin\AppData\Local\Temp\0gZ4LxOTZhtAJjH.exe2⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious behavior: GetForegroundWindowSpam
PID:3016
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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
PID:2112
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
700B
MD557845668eba5efa0e0262c3d536bc3fb
SHA1fedcde628e45ef501cb14643c57f6112f2aaf4a9
SHA25622f107c7ab88fdd5cdb363379ae10dfd91255080fb7c9feb23cf9bbbe506adea
SHA5125e4474b63b5b21b6c838f8c61845497172dbe9ccdb65b2a29abf60be12f30015c1b5d816e918a689bc79d951cda1c80fafbc61c55a34791f1394d5b283bfafc7
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Filesize
71KB
MD5f9d4ab0a726adc9b5e4b7d7b724912f1
SHA13d42ca2098475924f70ee4a831c4f003b4682328
SHA256b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc
SHA51222a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432
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Filesize
11.7MB
MD5d50d5712566f1df16b5aea21b9e0ee24
SHA1f442aa68ec8d838625f382bcf273f5d0f66427ea
SHA256e102238100a8b97d22559065e3b19379757aeda932c36916d2c84a4178921854
SHA512f9b8d6762a8b00392519b949083d5f0a3670ed24583ed4aaa7570cbc24914e0c19933486004d8949fbee930b8f0e66b50a05e3c478c193ba269677dcd619d7d0
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Filesize
14KB
MD5d753362649aecd60ff434adf171a4e7f
SHA13b752ad064e06e21822c8958ae22e9a6bb8cf3d0
SHA2568f24c6cf0b06d18f3c07e7bfca4e92afce71834663746cfaa9ddf52a25d5c586
SHA51241bf41add275867553fa3bd8835cd7e2a2a362a2d5670ccbfad23700448bad9fe0f577fb6ee9d4eb81dfc10d463b325b8a873fe5912eb580936d4ad96587aa6d
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Filesize
10KB
MD556a321bd011112ec5d8a32b2f6fd3231
SHA1df20e3a35a1636de64df5290ae5e4e7572447f78
SHA256bb6df93369b498eaa638b0bcdc4bb89f45e9b02ca12d28bcedf4629ea7f5e0f1
SHA5125354890cbc53ce51081a78c64ba9c4c8c4dc9e01141798c1e916e19c5776dac7c82989fad0f08c73e81aaba332dad81205f90d0663119af45550b97b338b9cc3
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Filesize
4KB
MD5e840e7f30c85e22b09a41098ff3f3343
SHA1ad1eb7b2ba66ae87641947025736c67efbc4b9d8
SHA2566707e9e88dec460c2cf421bd2bc6a314f15717527cb60dcad2fbb7352ae711a3
SHA512ea1362c9e7ac9666d6cbfc02939a6e9c411f6aef113dc8ec898c383fc4ecf9d957c6ad8f75c33847d5da0b4427c861f0ccaf240cb1def189313de2948881dc1b