gcleaner | efec912465df5c55b4764e0277aa4c4c549e612b4f3c5abf77aaec647729f78a

General

Target

file.exe
Size

4KB
MD5

ddc9229a87f36e9d555ddae1c8d4ac09
SHA1

e902d5ab723fa81913dd73999da9778781647c28
SHA256

efec912465df5c55b4764e0277aa4c4c549e612b4f3c5abf77aaec647729f78a
SHA512

08b5ad94168bf90bae2f2917fde1b2a36650845fdcb23881d76ddddae73359fbd774c92083ba03a84083c48d4922afb339c637d49dfa67fbf9eb95b3bf86baa6
SSDEEP

48:66sn7l2zMdoHSe0rHNMMb9Y7VxCioXsTfxZsFtow/ljhFvCFipfbNtm:PYqX9VxCJ8U/3F5zNt

Score

10^/10

gcleaner discovery loader

Malware Config

Extracted

Family

gcleaner

C2

80.66.75.114

45.91.200.135

Signatures

GCleaner
GCleaner is a Pay-Per-Install malware loader first discovered in early 2019.
loader gcleaner
Downloads MZ/PE file

Checks computer location settings 2 TTPs 2 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-1-5-21-2392887640-1187051047-2909758433-1000\Control Panel\International\Geo\Nation	file.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2392887640-1187051047-2909758433-1000\Control Panel\International\Geo\Nation	tmp80D8.tmp.exe

Executes dropped EXE 1 IoCs

pid	Process
1768	tmp80D8.tmp.exe

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

System Information Discovery
T1082

Program crash 10 IoCs

pid	pid_target	Process	procid_target
3564	1768	WerFault.exe	82
1252	1768	WerFault.exe	82
4632	1768	WerFault.exe	82
2332	1768	WerFault.exe	82
3332	1768	WerFault.exe	82
2296	1768	WerFault.exe	82
3624	1768	WerFault.exe	82
3736	1768	WerFault.exe	82
448	1768	WerFault.exe	82
1228	1768	WerFault.exe	82

System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	taskkill.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	tmp80D8.tmp.exe

Kills process with taskkill 1 IoCs

evasion

pid	Process
2808	taskkill.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1180	file.exe
Token: SeDebugPrivilege	2808	taskkill.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 1180 wrote to memory of 1768	1180	file.exe	82
PID 1180 wrote to memory of 1768	1180	file.exe	82
PID 1180 wrote to memory of 1768	1180	file.exe	82
PID 1768 wrote to memory of 4508	1768	tmp80D8.tmp.exe	111
PID 1768 wrote to memory of 4508	1768	tmp80D8.tmp.exe	111
PID 1768 wrote to memory of 4508	1768	tmp80D8.tmp.exe	111
PID 4508 wrote to memory of 2808	4508	cmd.exe	115
PID 4508 wrote to memory of 2808	4508	cmd.exe	115
PID 4508 wrote to memory of 2808	4508	cmd.exe	115

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Checks computer location settings
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1180
- C:\Users\Admin\AppData\Local\Temp\tmp80D8.tmp.exe
  "C:\Users\Admin\AppData\Local\Temp\tmp80D8.tmp.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1768
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1768 -s 452
    3⤵
    - Program crash
    PID:3564
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1768 -s 764
    3⤵
    - Program crash
    PID:1252
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1768 -s 804
    3⤵
    - Program crash
    PID:4632
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1768 -s 824
    3⤵
    - Program crash
    PID:2332
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1768 -s 868
    3⤵
    - Program crash
    PID:3332
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1768 -s 928
    3⤵
    - Program crash
    PID:2296
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1768 -s 932
    3⤵
    - Program crash
    PID:3624
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1768 -s 1044
    3⤵
    - Program crash
    PID:3736
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1768 -s 1624
    3⤵
    - Program crash
    PID:448
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c taskkill /im "tmp80D8.tmp.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\tmp80D8.tmp.exe" & exit
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:4508
  - - C:\Windows\SysWOW64\taskkill.exe
      taskkill /im "tmp80D8.tmp.exe" /f
      4⤵
      System Location Discovery: System Language Discovery
      Kills process with taskkill
      Suspicious use of AdjustPrivilegeToken
      PID:2808
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1768 -s 492
    3⤵
    - Program crash
    PID:1228

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 412 -p 1768 -ip 1768
1⤵
PID:4380

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 412 -p 1768 -ip 1768
1⤵
PID:1864

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 468 -p 1768 -ip 1768
1⤵
PID:1288

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 184 -p 1768 -ip 1768
1⤵
PID:4140

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 428 -p 1768 -ip 1768
1⤵
PID:1656

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 484 -p 1768 -ip 1768
1⤵
PID:2692

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 468 -p 1768 -ip 1768
1⤵
PID:4224

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 484 -p 1768 -ip 1768
1⤵
PID:2108

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 184 -p 1768 -ip 1768
1⤵
PID:5104

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 524 -p 1768 -ip 1768
1⤵
PID:4524

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\IE\WLXU5DI6\download[1].htm

Filesize
1B

MD5
cfcd208495d565ef66e7dff9f98764da

SHA1
b6589fc6ab0dc82cf12099d1c2d40ab994e8410c

SHA256
5feceb66ffc86f38d952786c6d696c79c2dbc239dd4e91b46729d73a27fb57e9

SHA512
31bca02094eb78126a517b206a88c73cfa9ec6f704c7030d18212cace820f025f00bf0ea68dbf3f3a5436ca63b53bf7bf80ad8d5de7d8359d0b7fed9dbc3ab99

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp80D8.tmp.exe

Filesize
334KB

MD5
bdf38f58675cd77401c679df69c4a3e8

SHA1
298dac0330058235adec1bd5dd80c59f99c688af

SHA256
08dc5b0fb0c2646f546f0af389c3c9934995f1cf6819a05c171db3eca242554d

SHA512
fa056f5784c76252db3edff2f0ba060b2ac42fbb2c73fedaa076ba735b2f19c14b7feff69f6794f0108c98fe91764e4d45110459e87df68a072a78f212a363c1

Download Submit
memory/1180-0-0x00007FFD1F223000-0x00007FFD1F225000-memory.dmp

Filesize
8KB

Download
memory/1180-1-0x0000000000A70000-0x0000000000A78000-memory.dmp

Filesize
32KB

Download
memory/1180-2-0x00007FFD1F220000-0x00007FFD1FCE1000-memory.dmp

Filesize
10.8MB

Download
memory/1180-12-0x00007FFD1F220000-0x00007FFD1FCE1000-memory.dmp

Filesize
10.8MB

Download
memory/1768-21-0x0000000010000000-0x000000001001C000-memory.dmp

Filesize
112KB

Download
memory/1768-16-0x0000000000400000-0x000000000043F000-memory.dmp

Filesize
252KB

Download
memory/1768-15-0x0000000002300000-0x000000000233B000-memory.dmp

Filesize
236KB

Download
memory/1768-25-0x0000000000700000-0x0000000000800000-memory.dmp

Filesize
1024KB

Download
memory/1768-27-0x0000000000400000-0x0000000000550000-memory.dmp

Filesize
1.3MB

Download
memory/1768-28-0x0000000002300000-0x000000000233B000-memory.dmp

Filesize
236KB

Download
memory/1768-30-0x0000000000400000-0x000000000043F000-memory.dmp

Filesize
252KB

Download
memory/1768-14-0x0000000000700000-0x0000000000800000-memory.dmp

Filesize
1024KB

Download
memory/1768-40-0x0000000000400000-0x0000000000550000-memory.dmp

Filesize
1.3MB

Download
memory/1768-48-0x0000000000400000-0x0000000000550000-memory.dmp

Filesize
1.3MB

Download
memory/1768-49-0x0000000000400000-0x000000000043F000-memory.dmp

Filesize
252KB

Download

Analysis

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