Analysis
- max time kernel
56s - max time network
58s - platform
windows7_x64 - resource
win7-20230220-en - resource tags
- submitted
25/03/2023, 01:14
General
- Target file.exe
- Size 2.1MB
- Sample230325-blm6ysce21
- SHA256 5637aef3fb43a418cd5bb036103fb3f7427e5062c5d23e14ab3b65c7d87793ec
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.
- Executes dropped EXE 3 IoCs
- Loads dropped DLL 6 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 3 IoCs
- Suspicious use of AdjustPrivilegeToken 1 IoCs
- Suspicious use of WriteProcessMemory 23 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\file.exe"C:\Users\Admin\AppData\Local\Temp\file.exe"1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\is-80G3V.tmp\is-AAMNG.tmp"C:\Users\Admin\AppData\Local\Temp\is-80G3V.tmp\is-AAMNG.tmp" /SL4 $70126 "C:\Users\Admin\AppData\Local\Temp\file.exe" 1935889 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)\FJCsoftFR\FRec324\FRec324.exe"C:\Program Files (x86)\FJCsoftFR\FRec324\FRec324.exe"3⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\jeZviD2.exe4⤵
- Executes dropped EXE
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c taskkill /im "FRec324.exe" /f & erase "C:\Program Files (x86)\FJCsoftFR\FRec324\FRec324.exe" & exit4⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\taskkill.exetaskkill /im "FRec324.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
FRec324.exe
FRec324.exe
dll[2].htm
is-AAMNG.tmp
is-AAMNG.tmp
jeZviD2.exe
FRec324.exe
is-AAMNG.tmp
_iscrypt.dll
_shfoldr.dll
_shfoldr.dll
jeZviD2.exe
memory/856-93-0x0000000000400000-0x000000000145B000-memory.dmp
memory/856-133-0x0000000000400000-0x000000000145B000-memory.dmp
memory/856-92-0x0000000000400000-0x000000000145B000-memory.dmp
memory/856-110-0x0000000000400000-0x000000000145B000-memory.dmp
memory/856-106-0x0000000010000000-0x000000001001B000-memory.dmp
memory/856-101-0x0000000000400000-0x000000000145B000-memory.dmp
memory/1196-103-0x0000000003CF0000-0x0000000004D4B000-memory.dmp
memory/1196-100-0x0000000000400000-0x00000000004B4000-memory.dmp
memory/1196-91-0x0000000003CF0000-0x0000000004D4B000-memory.dmp
memory/1196-134-0x0000000000400000-0x00000000004B4000-memory.dmp
memory/1196-88-0x0000000000240000-0x0000000000241000-memory.dmp
memory/2024-99-0x0000000000400000-0x0000000000413000-memory.dmp
memory/2024-54-0x0000000000400000-0x0000000000413000-memory.dmp
memory/2024-135-0x0000000000400000-0x0000000000413000-memory.dmp