Analysis
- max time kernel
140s - max time network
148s - platform
windows10-2004_x64 - resource
win10v2004-20220812-en - resource tags
- submitted
16/01/2023, 01:31
General
- Target file.exe
- Size 1.4MB
- Sample230116-bxdfwsbc51
- SHA256 b8eb433b1b9294a2c3351d41c185f468276dc4ff9293560bed35b6cefb535ad7
Malware Config
Extracted
-
gcleaner
-
45.139.105.171
-
85.31.46.167
-
107.182.129.235
-
171.22.30.106
Signatures
- GCleaner
GCleaner is a Pay-Per-Install malware loader first discovered in early 2019.
- Executes dropped EXE 3 IoCs
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- Loads dropped DLL 1 IoCs
- Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
- Drops file in Program Files directory 17 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
- Kills process with taskkill 1 IoCs
- Suspicious behavior: EnumeratesProcesses 6 IoCs
- Suspicious behavior: GetForegroundWindowSpam 1 IoCs
- Suspicious use of AdjustPrivilegeToken 1 IoCs
- Suspicious use of WriteProcessMemory 15 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\file.exe"C:\Users\Admin\AppData\Local\Temp\file.exe"1⤵
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\is-VQ6KS.tmp\file.tmp"C:\Users\Admin\AppData\Local\Temp\is-VQ6KS.tmp\file.tmp" /SL5="$90064,1246024,232960,C:\Users\Admin\AppData\Local\Temp\file.exe"2⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
-
C:\Program Files (x86)\Pit Files\PitFiles449.exe"C:\Program Files (x86)\Pit Files\PitFiles449.exe"3⤵
- Executes dropped EXE
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\rEkk0pqoBQEkr.exe4⤵
- Executes dropped EXE
-
-
C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c taskkill /im "PitFiles449.exe" /f & erase "C:\Program Files (x86)\Pit Files\PitFiles449.exe" & exit4⤵
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\taskkill.exetaskkill /im "PitFiles449.exe" /f5⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
-
-
-
-
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
PitFiles449.exe
PitFiles449.exe
_iscrypt.dll
file.tmp
file.tmp
rEkk0pqoBQEkr.exe
rEkk0pqoBQEkr.exe
memory/3952-132-0x0000000000400000-0x0000000000440000-memory.dmp
memory/3952-156-0x0000000000400000-0x0000000000440000-memory.dmp
memory/3952-138-0x0000000000400000-0x0000000000440000-memory.dmp
memory/4780-143-0x0000000000400000-0x000000000144C000-memory.dmp
memory/4780-148-0x0000000000400000-0x000000000144C000-memory.dmp
memory/4780-149-0x0000000010000000-0x000000001001B000-memory.dmp
memory/4780-144-0x0000000000400000-0x000000000144C000-memory.dmp
memory/4780-142-0x0000000000400000-0x000000000144C000-memory.dmp
memory/4780-155-0x0000000000400000-0x000000000144C000-memory.dmp