gcleaner | 6581bbef0a6cf8eb66596fb79a4b35dece2e102812e42da6b6de2b9d0622aad5

General

Target

cbbc463765d83301e3d9c45f8acea140N.exe
Size

383KB
MD5

cbbc463765d83301e3d9c45f8acea140
SHA1

d6759a1abc74f2b2f754c060797ae57928689161
SHA256

6581bbef0a6cf8eb66596fb79a4b35dece2e102812e42da6b6de2b9d0622aad5
SHA512

862b51b2a222c90134f83035c6fbd0b7d4bbc666607faf285eb68bb94512a4dc404202135ac01f96f359f4626621ec5b123f7b4fba0b07e2cf5deccd0e7cc9f2
SSDEEP

6144:LEO9keKeQrw6P+cdqWoAfA/OyGrUH9i+TE45kmf:L2ed+we+cNS/999l5

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	cbbc463765d83301e3d9c45f8acea140N.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
2828	1920	WerFault.exe	85
1460	1920	WerFault.exe	85
3412	1920	WerFault.exe	85
1428	1920	WerFault.exe	85
404	1920	WerFault.exe	85
4456	1920	WerFault.exe	85
2820	1920	WerFault.exe	85
4628	1920	WerFault.exe	85
2696	1920	WerFault.exe	85

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	cbbc463765d83301e3d9c45f8acea140N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Kills process with taskkill 1 IoCs

evasion

pid	Process
2064	taskkill.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2064	taskkill.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1920 wrote to memory of 1400	1920	cbbc463765d83301e3d9c45f8acea140N.exe	115
PID 1920 wrote to memory of 1400	1920	cbbc463765d83301e3d9c45f8acea140N.exe	115
PID 1920 wrote to memory of 1400	1920	cbbc463765d83301e3d9c45f8acea140N.exe	115
PID 1400 wrote to memory of 2064	1400	cmd.exe	119
PID 1400 wrote to memory of 2064	1400	cmd.exe	119
PID 1400 wrote to memory of 2064	1400	cmd.exe	119

C:\Users\Admin\AppData\Local\Temp\cbbc463765d83301e3d9c45f8acea140N.exe
"C:\Users\Admin\AppData\Local\Temp\cbbc463765d83301e3d9c45f8acea140N.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1920
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1920 -s 440
  2⤵
  - Program crash
  PID:2828
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1920 -s 764
  2⤵
  - Program crash
  PID:1460
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1920 -s 768
  2⤵
  - Program crash
  PID:3412
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1920 -s 788
  2⤵
  - Program crash
  PID:1428
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1920 -s 836
  2⤵
  - Program crash
  PID:404
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1920 -s 928
  2⤵
  - Program crash
  PID:4456
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1920 -s 1020
  2⤵
  - Program crash
  PID:2820
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1920 -s 1560
  2⤵
  - Program crash
  PID:4628
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c taskkill /im "cbbc463765d83301e3d9c45f8acea140N.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\cbbc463765d83301e3d9c45f8acea140N.exe" & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1400
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "cbbc463765d83301e3d9c45f8acea140N.exe" /f
    3⤵
    - System Location Discovery: System Language Discovery
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:2064
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1920 -s 516
  2⤵
  - Program crash
  PID:2696

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 424 -p 1920 -ip 1920
1⤵
PID:816

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 524 -p 1920 -ip 1920
1⤵
PID:1952

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 544 -p 1920 -ip 1920
1⤵
PID:2744

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 548 -p 1920 -ip 1920
1⤵
PID:4416

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 576 -p 1920 -ip 1920
1⤵
PID:4036

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 576 -p 1920 -ip 1920
1⤵
PID:2992

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 596 -p 1920 -ip 1920
1⤵
PID:3940

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 560 -p 1920 -ip 1920
1⤵
PID:2740

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 552 -p 1920 -ip 1920
1⤵
PID:4948

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/1920-1-0x00000000027B0000-0x00000000028B0000-memory.dmp

Filesize
1024KB

Download
memory/1920-2-0x00000000026E0000-0x000000000271B000-memory.dmp

Filesize
236KB

Download
memory/1920-3-0x0000000000400000-0x000000000043F000-memory.dmp

Filesize
252KB

Download
memory/1920-8-0x0000000010000000-0x000000001001C000-memory.dmp

Filesize
112KB

Download
memory/1920-13-0x00000000027B0000-0x00000000028B0000-memory.dmp

Filesize
1024KB

Download
memory/1920-14-0x00000000026E0000-0x000000000271B000-memory.dmp

Filesize
236KB

Download
memory/1920-15-0x0000000000400000-0x0000000002478000-memory.dmp

Filesize
32.5MB

Download
memory/1920-17-0x0000000000400000-0x000000000043F000-memory.dmp

Filesize
252KB

Download
memory/1920-30-0x0000000000400000-0x0000000002478000-memory.dmp

Filesize
32.5MB

Download
memory/1920-37-0x0000000000400000-0x000000000043F000-memory.dmp

Filesize
252KB

Download
memory/1920-36-0x0000000000400000-0x0000000002478000-memory.dmp

Filesize
32.5MB

Download

Analysis

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