gcleaner | 4fbb67c0ef74f07ac1b31dba5d136938735bbd00544d27b4931a4a79e12f1f5f

Analysis

max time kernel
145s
max time network
129s
platform
windows10-2004_x64
resource
win10v2004-20230220-en
resource tags

arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
submitted
06/03/2023, 15:40

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General

Target
34f8808d1a51641fac355ba5c92f7114.exe
Size 385KB
Sample230306-s37qcsdb25
SHA256 4fbb67c0ef74f07ac1b31dba5d136938735bbd00544d27b4931a4a79e12f1f5f
MD5 34f8808d1a51641fac355ba5c92f7114
SHA1 eb6774b48254e0b37f357dffb5ea620bc8cca5f3
SHA512 dfff6523cf9393c3a9e41925c6a8905ea4be3155a46334193ed839b783288ed7ccb9fe946411d2c1e896eb839d8cb3e76ed1cadb1987f616fdede1940d2146a5
SSDEEP 3072:t5uIKIRGXJuLGNafEnyKWus/1T6J2d+kVojCI40+/xJP92VBY3TQGcuD4EBWrFVU:YI6uLGcE70dpd+kVx1x/2VWxcu8sWR
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

gcleaner loader

Malware Config

Extracted

Family

gcleaner

45.12.253.56
45.12.253.72
45.12.253.98
45.12.253.75

Signatures

GCleaner
GCleaner is a Pay-Per-Install malware loader first discovered in early 2019.
loader gcleaner

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\Control Panel\International\Geo\Nation	34f8808d1a51641fac355ba5c92f7114.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Program crash 7 IoCs

pid	pid_target	Process	procid_target
1368	820	WerFault.exe	83
4388	820	WerFault.exe	83
208	820	WerFault.exe	83
3492	820	WerFault.exe	83
4492	820	WerFault.exe	83
4460	820	WerFault.exe	83
2708	820	WerFault.exe	83

Kills process with taskkill 1 IoCs

evasion

pid	Process
3408	taskkill.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3408	taskkill.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 820 wrote to memory of 2352	820	34f8808d1a51641fac355ba5c92f7114.exe	99
PID 820 wrote to memory of 2352	820	34f8808d1a51641fac355ba5c92f7114.exe	99
PID 820 wrote to memory of 2352	820	34f8808d1a51641fac355ba5c92f7114.exe	99
PID 2352 wrote to memory of 3408	2352	cmd.exe	103
PID 2352 wrote to memory of 3408	2352	cmd.exe	103
PID 2352 wrote to memory of 3408	2352	cmd.exe	103

C:\Users\Admin\AppData\Local\Temp\34f8808d1a51641fac355ba5c92f7114.exe
"C:\Users\Admin\AppData\Local\Temp\34f8808d1a51641fac355ba5c92f7114.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:820
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 820 -s 716
  2⤵
  - Program crash
  PID:1368
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 820 -s 780
  2⤵
  - Program crash
  PID:4388
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 820 -s 788
  2⤵
  - Program crash
  PID:208
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 820 -s 788
  2⤵
  - Program crash
  PID:3492
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 820 -s 788
  2⤵
  - Program crash
  PID:4492
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 820 -s 928
  2⤵
  - Program crash
  PID:4460
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c taskkill /im "34f8808d1a51641fac355ba5c92f7114.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\34f8808d1a51641fac355ba5c92f7114.exe" & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2352
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "34f8808d1a51641fac355ba5c92f7114.exe" /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:3408
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 820 -s 740
  2⤵
  - Program crash
  PID:2708

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 416 -p 820 -ip 820
1⤵
PID:3612

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 820 -ip 820
1⤵
PID:1272

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 536 -p 820 -ip 820
1⤵
PID:3000

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 472 -p 820 -ip 820
1⤵
PID:764

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 532 -p 820 -ip 820
1⤵
PID:5008

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 544 -p 820 -ip 820
1⤵
PID:3444

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 532 -p 820 -ip 820
1⤵
PID:668

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/820-134-0x0000000004900000-0x0000000004940000-memory.dmp

Download

memory/820-135-0x0000000000400000-0x0000000002BCE000-memory.dmp