gcleaner | a1b85d8af74805b06c0738f0d891aab6bb9fd75a3d9c87d1b0f23af1463fb179

General

Target

a1b85d8af74805b06c0738f0d891aab6bb9fd75a3d9c87d1b0f23af1463fb179.exe
Size

280KB
MD5

cb0c7fbaf692a97c222ff428aac49c56
SHA1

c760155600a9b403cb5a7084d3191ef0ed28a22a
SHA256

a1b85d8af74805b06c0738f0d891aab6bb9fd75a3d9c87d1b0f23af1463fb179
SHA512

bc201aa4b14bd0d0aee3fe32cedf6246ed8554aa43b42dd54aaec10fca3a9e73ee70507b58742bfc855a8c5e5a1fa7640798bfcd794859ebb785edae597dd27e
SSDEEP

6144:xwXs4RYR0t+Xiz7D7A7+JB8v+wPro/X0:xwVRsSPB8mwPro

Score

10^/10

gcleaner discovery loader

Malware Config

Extracted

Family

gcleaner

C2

80.66.75.114

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-1-5-21-523280732-2327480845-3730041215-1000\Control Panel\International\Geo\Nation	a1b85d8af74805b06c0738f0d891aab6bb9fd75a3d9c87d1b0f23af1463fb179.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
4656	1360	WerFault.exe	82
928	1360	WerFault.exe	82
2752	1360	WerFault.exe	82
4228	1360	WerFault.exe	82
2028	1360	WerFault.exe	82
4588	1360	WerFault.exe	82
4564	1360	WerFault.exe	82
800	1360	WerFault.exe	82
3528	1360	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	taskkill.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	a1b85d8af74805b06c0738f0d891aab6bb9fd75a3d9c87d1b0f23af1463fb179.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Kills process with taskkill 1 IoCs

evasion

pid	Process
916	taskkill.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	916	taskkill.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1360 wrote to memory of 1084	1360	a1b85d8af74805b06c0738f0d891aab6bb9fd75a3d9c87d1b0f23af1463fb179.exe	111
PID 1360 wrote to memory of 1084	1360	a1b85d8af74805b06c0738f0d891aab6bb9fd75a3d9c87d1b0f23af1463fb179.exe	111
PID 1360 wrote to memory of 1084	1360	a1b85d8af74805b06c0738f0d891aab6bb9fd75a3d9c87d1b0f23af1463fb179.exe	111
PID 1084 wrote to memory of 916	1084	cmd.exe	115
PID 1084 wrote to memory of 916	1084	cmd.exe	115
PID 1084 wrote to memory of 916	1084	cmd.exe	115

C:\Users\Admin\AppData\Local\Temp\a1b85d8af74805b06c0738f0d891aab6bb9fd75a3d9c87d1b0f23af1463fb179.exe
"C:\Users\Admin\AppData\Local\Temp\a1b85d8af74805b06c0738f0d891aab6bb9fd75a3d9c87d1b0f23af1463fb179.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1360
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1360 -s 748
  2⤵
  - Program crash
  PID:4656
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1360 -s 756
  2⤵
  - Program crash
  PID:928
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1360 -s 776
  2⤵
  - Program crash
  PID:2752
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1360 -s 820
  2⤵
  - Program crash
  PID:4228
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1360 -s 904
  2⤵
  - Program crash
  PID:2028
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1360 -s 980
  2⤵
  - Program crash
  PID:4588
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1360 -s 1016
  2⤵
  - Program crash
  PID:4564
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1360 -s 1496
  2⤵
  - Program crash
  PID:800
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c taskkill /im "a1b85d8af74805b06c0738f0d891aab6bb9fd75a3d9c87d1b0f23af1463fb179.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\a1b85d8af74805b06c0738f0d891aab6bb9fd75a3d9c87d1b0f23af1463fb179.exe" & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1084
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "a1b85d8af74805b06c0738f0d891aab6bb9fd75a3d9c87d1b0f23af1463fb179.exe" /f
    3⤵
    - System Location Discovery: System Language Discovery
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:916
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1360 -s 1552
  2⤵
  - Program crash
  PID:3528

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 416 -p 1360 -ip 1360
1⤵
PID:1052

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 184 -p 1360 -ip 1360
1⤵
PID:3616

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 476 -p 1360 -ip 1360
1⤵
PID:4660

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 468 -p 1360 -ip 1360
1⤵
PID:4704

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 504 -p 1360 -ip 1360
1⤵
PID:3304

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 512 -p 1360 -ip 1360
1⤵
PID:4784

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 544 -p 1360 -ip 1360
1⤵
PID:2592

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 520 -p 1360 -ip 1360
1⤵
PID:3700

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 580 -p 1360 -ip 1360
1⤵
PID:1712

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

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\IE\3GJVVK7B\download[1].htm

Filesize
1B

MD5
cfcd208495d565ef66e7dff9f98764da

SHA1
b6589fc6ab0dc82cf12099d1c2d40ab994e8410c

SHA256
5feceb66ffc86f38d952786c6d696c79c2dbc239dd4e91b46729d73a27fb57e9

SHA512
31bca02094eb78126a517b206a88c73cfa9ec6f704c7030d18212cace820f025f00bf0ea68dbf3f3a5436ca63b53bf7bf80ad8d5de7d8359d0b7fed9dbc3ab99

Download Submit
memory/1360-1-0x0000000002950000-0x0000000002A50000-memory.dmp

Filesize
1024KB

Download
memory/1360-2-0x00000000044F0000-0x000000000451D000-memory.dmp

Filesize
180KB

Download
memory/1360-3-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/1360-8-0x0000000002950000-0x0000000002A50000-memory.dmp

Filesize
1024KB

Download
memory/1360-10-0x00000000044F0000-0x000000000451D000-memory.dmp

Filesize
180KB

Download
memory/1360-12-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/1360-11-0x0000000000400000-0x0000000002796000-memory.dmp

Filesize
35.6MB

Download
memory/1360-22-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/1360-21-0x0000000000400000-0x0000000002796000-memory.dmp

Filesize
35.6MB

Download

Analysis

Sharing