gcleaner | 8c55d689dfdff3c0e87ace5baaf075a3f80c7ecb61d658d345e949f9a28efd6d

General

Target

8c55d689dfdff3c0e87ace5baaf075a3f80c7ecb61d658d345e949f9a28efd6d.exe
Size

423KB
MD5

2ceaa3ee3ce6b01f30728b16eb1590e1
SHA1

a81f3e6aec5686730d6c94c53d3bc3e09f42297d
SHA256

8c55d689dfdff3c0e87ace5baaf075a3f80c7ecb61d658d345e949f9a28efd6d
SHA512

868b1cbcfee92553307e5256226ffe92d6cc23fe7c30abf3f9ee3700313f20803f0fd45dbd808052b53c5549d628a55f17888f11241b89a86241b30827cfee45
SSDEEP

12288:CLu8fqVx6678b1OfTwlOR/7hKDanKJLy:Ca8fSJ85OfUOB7ZnKY

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 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-1-5-21-656926755-4116854191-210765258-1000\Control Panel\International\Geo\Nation	8c55d689dfdff3c0e87ace5baaf075a3f80c7ecb61d658d345e949f9a28efd6d.exe

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

System Information Discovery
T1082

Program crash 9 IoCs

pid	pid_target	Process	procid_target
4432	4140	WerFault.exe	82
3940	4140	WerFault.exe	82
5080	4140	WerFault.exe	82
4548	4140	WerFault.exe	82
3808	4140	WerFault.exe	82
1592	4140	WerFault.exe	82
4440	4140	WerFault.exe	82
3040	4140	WerFault.exe	82
1868	4140	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	8c55d689dfdff3c0e87ace5baaf075a3f80c7ecb61d658d345e949f9a28efd6d.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	taskkill.exe

Kills process with taskkill 1 IoCs

evasion

pid	Process
4984	taskkill.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4984	taskkill.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4140 wrote to memory of 320	4140	8c55d689dfdff3c0e87ace5baaf075a3f80c7ecb61d658d345e949f9a28efd6d.exe	112
PID 4140 wrote to memory of 320	4140	8c55d689dfdff3c0e87ace5baaf075a3f80c7ecb61d658d345e949f9a28efd6d.exe	112
PID 4140 wrote to memory of 320	4140	8c55d689dfdff3c0e87ace5baaf075a3f80c7ecb61d658d345e949f9a28efd6d.exe	112
PID 320 wrote to memory of 4984	320	cmd.exe	116
PID 320 wrote to memory of 4984	320	cmd.exe	116
PID 320 wrote to memory of 4984	320	cmd.exe	116

C:\Users\Admin\AppData\Local\Temp\8c55d689dfdff3c0e87ace5baaf075a3f80c7ecb61d658d345e949f9a28efd6d.exe
"C:\Users\Admin\AppData\Local\Temp\8c55d689dfdff3c0e87ace5baaf075a3f80c7ecb61d658d345e949f9a28efd6d.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4140
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4140 -s 472
  2⤵
  - Program crash
  PID:4432
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4140 -s 756
  2⤵
  - Program crash
  PID:3940
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4140 -s 772
  2⤵
  - Program crash
  PID:5080
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4140 -s 796
  2⤵
  - Program crash
  PID:4548
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4140 -s 836
  2⤵
  - Program crash
  PID:3808
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4140 -s 928
  2⤵
  - Program crash
  PID:1592
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4140 -s 1000
  2⤵
  - Program crash
  PID:4440
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4140 -s 1560
  2⤵
  - Program crash
  PID:3040
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c taskkill /im "8c55d689dfdff3c0e87ace5baaf075a3f80c7ecb61d658d345e949f9a28efd6d.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\8c55d689dfdff3c0e87ace5baaf075a3f80c7ecb61d658d345e949f9a28efd6d.exe" & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:320
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "8c55d689dfdff3c0e87ace5baaf075a3f80c7ecb61d658d345e949f9a28efd6d.exe" /f
    3⤵
    - System Location Discovery: System Language Discovery
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:4984
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4140 -s 532
  2⤵
  - Program crash
  PID:1868

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4140 -ip 4140
1⤵
PID:2832

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4140 -ip 4140
1⤵
PID:4800

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 528 -p 4140 -ip 4140
1⤵
PID:2224

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 416 -p 4140 -ip 4140
1⤵
PID:1468

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 416 -p 4140 -ip 4140
1⤵
PID:4624

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 524 -p 4140 -ip 4140
1⤵
PID:644

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 440 -p 4140 -ip 4140
1⤵
PID:1904

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 536 -p 4140 -ip 4140
1⤵
PID:1840

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 4140 -ip 4140
1⤵
PID:4296

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\H9MX5QVK\download[1].htm

Filesize
1B

MD5
cfcd208495d565ef66e7dff9f98764da

SHA1
b6589fc6ab0dc82cf12099d1c2d40ab994e8410c

SHA256
5feceb66ffc86f38d952786c6d696c79c2dbc239dd4e91b46729d73a27fb57e9

SHA512
31bca02094eb78126a517b206a88c73cfa9ec6f704c7030d18212cace820f025f00bf0ea68dbf3f3a5436ca63b53bf7bf80ad8d5de7d8359d0b7fed9dbc3ab99

Download Submit
memory/4140-1-0x00000000007E0000-0x00000000008E0000-memory.dmp

Filesize
1024KB

Download
memory/4140-2-0x00000000007A0000-0x00000000007DB000-memory.dmp

Filesize
236KB

Download
memory/4140-3-0x0000000000400000-0x000000000043F000-memory.dmp

Filesize
252KB

Download
memory/4140-8-0x0000000010000000-0x000000001001C000-memory.dmp

Filesize
112KB

Download
memory/4140-13-0x00000000007E0000-0x00000000008E0000-memory.dmp

Filesize
1024KB

Download
memory/4140-16-0x00000000007A0000-0x00000000007DB000-memory.dmp

Filesize
236KB

Download
memory/4140-15-0x0000000000400000-0x00000000005FE000-memory.dmp

Filesize
2.0MB

Download
memory/4140-17-0x0000000000400000-0x000000000043F000-memory.dmp

Filesize
252KB

Download
memory/4140-29-0x0000000000400000-0x00000000005FE000-memory.dmp

Filesize
2.0MB

Download
memory/4140-35-0x0000000000400000-0x00000000005FE000-memory.dmp

Filesize
2.0MB

Download
memory/4140-36-0x0000000000400000-0x000000000043F000-memory.dmp

Filesize
252KB

Download

Analysis

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