Analysis
- max time kernel
134s - max time network
137s - platform
windows10-2004_x64 - resource
win10v2004-20230220-en - resource tags
- submitted
01/03/2023, 07:07
General
- Target file.exe
- Size 2.5MB
- Sample230301-hxmswsfb33
- SHA256 80c23d3e20447c98454bb10ff5408b0c3540d7ee52f8c8f0feaa42cc00a66eee
Malware Config
Extracted
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gcleaner
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45.12.253.56
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45.12.253.72
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45.12.253.98
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45.12.253.75
Signatures
- GCleaner
GCleaner is a Pay-Per-Install malware loader first discovered in early 2019.
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- Executes dropped EXE 3 IoCs
- Loads dropped DLL 3 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 9 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
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C:\Users\Admin\AppData\Local\Temp\file.exe"C:\Users\Admin\AppData\Local\Temp\file.exe"1⤵
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\is-A6SQE.tmp\is-IQ5KI.tmp"C:\Users\Admin\AppData\Local\Temp\is-A6SQE.tmp\is-IQ5KI.tmp" /SL4 $8003A "C:\Users\Admin\AppData\Local\Temp\file.exe" 2405414 527362⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
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C:\Program Files (x86)\FIIsoftFR\FRec31\FRec31.exe"C:\Program Files (x86)\FIIsoftFR\FRec31\FRec31.exe"3⤵
- Checks computer location settings
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Roaming\{7f74da3b-b191-11ed-abe8-806e6f6e6963}\vi4Svv.exe4⤵
- Executes dropped EXE
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c taskkill /im "FRec31.exe" /f & erase "C:\Program Files (x86)\FIIsoftFR\FRec31\FRec31.exe" & exit4⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\taskkill.exetaskkill /im "FRec31.exe" /f5⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
FRec31.exe
FRec31.exe
dll[1].htm
is-IQ5KI.tmp
is-IQ5KI.tmp
_iscrypt.dll
_isdecmp.dll
_isdecmp.dll
vi4Svv.exe
vi4Svv.exe
memory/1300-133-0x0000000000400000-0x0000000000413000-memory.dmp
memory/1300-183-0x0000000000400000-0x0000000000413000-memory.dmp
memory/1300-215-0x0000000000400000-0x0000000000413000-memory.dmp
memory/1364-184-0x0000000000400000-0x00000000004B3000-memory.dmp
memory/1364-154-0x0000000002230000-0x0000000002231000-memory.dmp
memory/1364-214-0x0000000000400000-0x00000000004B3000-memory.dmp
memory/2288-172-0x0000000000400000-0x000000000149E000-memory.dmp
memory/2288-180-0x0000000010000000-0x000000001001B000-memory.dmp
memory/2288-185-0x0000000000400000-0x000000000149E000-memory.dmp
memory/2288-213-0x0000000000400000-0x000000000149E000-memory.dmp