gcleaner | f36829ff6541eb7136e7461f0c7f7d6eb50cc4d9cb97fad3e6a66062c29a6b40

General

Target

f36829ff6541eb7136e7461f0c7f7d6eb50cc4d9cb97fad3e6a66062c29a6b40.exe
Size

415KB
MD5

ce011ff48e6712de208f9a7334a1d253
SHA1

13057335afef2c674fe599546265bf1a28b699cd
SHA256

f36829ff6541eb7136e7461f0c7f7d6eb50cc4d9cb97fad3e6a66062c29a6b40
SHA512

1e3fe8de3b95fe409e46898e97026f5025aea23be2c16947aa5d9ced9fdb0ff951eb0b450e856304539f8bf522086157f722f465142b19db15f0305b3b19c763
SSDEEP

6144:81Dojbopa02YfMysDTi2Bi1NLyM7AlbGF2hiIZpDVOZ:8hqboaGWTiDT7AFGch/M

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
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-1-5-21-2412658365-3084825385-3340777666-1000\Control Panel\International\Geo\Nation	f36829ff6541eb7136e7461f0c7f7d6eb50cc4d9cb97fad3e6a66062c29a6b40.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
5072	3864	WerFault.exe	84
4440	3864	WerFault.exe	84
2700	3864	WerFault.exe	84
4692	3864	WerFault.exe	84
2060	3864	WerFault.exe	84
3476	3864	WerFault.exe	84
344	3864	WerFault.exe	84
2432	3864	WerFault.exe	84
5028	3864	WerFault.exe	84

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	f36829ff6541eb7136e7461f0c7f7d6eb50cc4d9cb97fad3e6a66062c29a6b40.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
4768	taskkill.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4768	taskkill.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3864 wrote to memory of 4000	3864	f36829ff6541eb7136e7461f0c7f7d6eb50cc4d9cb97fad3e6a66062c29a6b40.exe	114
PID 3864 wrote to memory of 4000	3864	f36829ff6541eb7136e7461f0c7f7d6eb50cc4d9cb97fad3e6a66062c29a6b40.exe	114
PID 3864 wrote to memory of 4000	3864	f36829ff6541eb7136e7461f0c7f7d6eb50cc4d9cb97fad3e6a66062c29a6b40.exe	114
PID 4000 wrote to memory of 4768	4000	cmd.exe	118
PID 4000 wrote to memory of 4768	4000	cmd.exe	118
PID 4000 wrote to memory of 4768	4000	cmd.exe	118

C:\Users\Admin\AppData\Local\Temp\f36829ff6541eb7136e7461f0c7f7d6eb50cc4d9cb97fad3e6a66062c29a6b40.exe
"C:\Users\Admin\AppData\Local\Temp\f36829ff6541eb7136e7461f0c7f7d6eb50cc4d9cb97fad3e6a66062c29a6b40.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3864
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3864 -s 456
  2⤵
  - Program crash
  PID:5072
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3864 -s 764
  2⤵
  - Program crash
  PID:4440
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3864 -s 772
  2⤵
  - Program crash
  PID:2700
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3864 -s 792
  2⤵
  - Program crash
  PID:4692
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3864 -s 836
  2⤵
  - Program crash
  PID:2060
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3864 -s 928
  2⤵
  - Program crash
  PID:3476
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3864 -s 932
  2⤵
  - Program crash
  PID:344
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3864 -s 1640
  2⤵
  - Program crash
  PID:2432
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c taskkill /im "f36829ff6541eb7136e7461f0c7f7d6eb50cc4d9cb97fad3e6a66062c29a6b40.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\f36829ff6541eb7136e7461f0c7f7d6eb50cc4d9cb97fad3e6a66062c29a6b40.exe" & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4000
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "f36829ff6541eb7136e7461f0c7f7d6eb50cc4d9cb97fad3e6a66062c29a6b40.exe" /f
    3⤵
    - System Location Discovery: System Language Discovery
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:4768
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3864 -s 492
  2⤵
  - Program crash
  PID:5028

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 424 -p 3864 -ip 3864
1⤵
PID:4108

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 372 -p 3864 -ip 3864
1⤵
PID:1844

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 472 -p 3864 -ip 3864
1⤵
PID:1388

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 556 -p 3864 -ip 3864
1⤵
PID:5000

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 568 -p 3864 -ip 3864
1⤵
PID:4976

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 548 -p 3864 -ip 3864
1⤵
PID:2204

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 580 -p 3864 -ip 3864
1⤵
PID:3816

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 560 -p 3864 -ip 3864
1⤵
PID:640

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 556 -p 3864 -ip 3864
1⤵
PID:4840

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\CFIOOOZS\download[1].htm

Filesize
1B

MD5
cfcd208495d565ef66e7dff9f98764da

SHA1
b6589fc6ab0dc82cf12099d1c2d40ab994e8410c

SHA256
5feceb66ffc86f38d952786c6d696c79c2dbc239dd4e91b46729d73a27fb57e9

SHA512
31bca02094eb78126a517b206a88c73cfa9ec6f704c7030d18212cace820f025f00bf0ea68dbf3f3a5436ca63b53bf7bf80ad8d5de7d8359d0b7fed9dbc3ab99

Download Submit
memory/3864-1-0x00000000006F0000-0x00000000007F0000-memory.dmp

Filesize
1024KB

Download
memory/3864-2-0x0000000002360000-0x000000000239C000-memory.dmp

Filesize
240KB

Download
memory/3864-3-0x0000000000400000-0x000000000043F000-memory.dmp

Filesize
252KB

Download
memory/3864-8-0x0000000010000000-0x000000001001C000-memory.dmp

Filesize
112KB

Download
memory/3864-13-0x00000000006F0000-0x00000000007F0000-memory.dmp

Filesize
1024KB

Download
memory/3864-16-0x0000000002360000-0x000000000239C000-memory.dmp

Filesize
240KB

Download
memory/3864-15-0x0000000000400000-0x00000000005FB000-memory.dmp

Filesize
2.0MB

Download
memory/3864-17-0x0000000000400000-0x000000000043F000-memory.dmp

Filesize
252KB

Download
memory/3864-29-0x0000000000400000-0x00000000005FB000-memory.dmp

Filesize
2.0MB

Download
memory/3864-36-0x0000000000400000-0x000000000043F000-memory.dmp

Filesize
252KB

Download
memory/3864-35-0x0000000000400000-0x00000000005FB000-memory.dmp

Filesize
2.0MB

Download

Analysis

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