gcleaner | 4b8129293d30068cbd4c2064950b12fd28aa7e92486cd4cf41d008e07188bbef

General

Target

4b8129293d30068cbd4c2064950b12fd28aa7e92486cd4cf41d008e07188bbef.exe
Size

381KB
MD5

74f80e6090693c6a3ac3a2be8c04aa02
SHA1

b2425774cea77b026a2977e4cefd848d50c6d429
SHA256

4b8129293d30068cbd4c2064950b12fd28aa7e92486cd4cf41d008e07188bbef
SHA512

a29921bb21655cb0b827ec219637f051b804cb01d86a82ab759f972e7af19d8bfece1a22ad3370584b6e47e3b64b090e4c0bf68e2b1d65aec32b0449ad8ef8b5
SSDEEP

6144:cB9KsjJYcvN6sg5ZmpSnmknQW4p/mDQtcdMx5S6f:c6yJYcvNifnlnQWacag

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-1-5-21-2170637797-568393320-3232933035-1000\Control Panel\International\Geo\Nation	4b8129293d30068cbd4c2064950b12fd28aa7e92486cd4cf41d008e07188bbef.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
2436	3596	WerFault.exe	89
3552	3596	WerFault.exe	89
1132	3596	WerFault.exe	89
4948	3596	WerFault.exe	89
1212	3596	WerFault.exe	89
4572	3596	WerFault.exe	89
3796	3596	WerFault.exe	89
1588	3596	WerFault.exe	89
600	3596	WerFault.exe	89
1608	3596	WerFault.exe	89

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	4b8129293d30068cbd4c2064950b12fd28aa7e92486cd4cf41d008e07188bbef.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
5004	taskkill.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	5004	taskkill.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3596 wrote to memory of 1528	3596	4b8129293d30068cbd4c2064950b12fd28aa7e92486cd4cf41d008e07188bbef.exe	123
PID 3596 wrote to memory of 1528	3596	4b8129293d30068cbd4c2064950b12fd28aa7e92486cd4cf41d008e07188bbef.exe	123
PID 3596 wrote to memory of 1528	3596	4b8129293d30068cbd4c2064950b12fd28aa7e92486cd4cf41d008e07188bbef.exe	123
PID 1528 wrote to memory of 5004	1528	cmd.exe	127
PID 1528 wrote to memory of 5004	1528	cmd.exe	127
PID 1528 wrote to memory of 5004	1528	cmd.exe	127

C:\Users\Admin\AppData\Local\Temp\4b8129293d30068cbd4c2064950b12fd28aa7e92486cd4cf41d008e07188bbef.exe
"C:\Users\Admin\AppData\Local\Temp\4b8129293d30068cbd4c2064950b12fd28aa7e92486cd4cf41d008e07188bbef.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3596
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3596 -s 452
  2⤵
  - Program crash
  PID:2436
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3596 -s 764
  2⤵
  - Program crash
  PID:3552
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3596 -s 784
  2⤵
  - Program crash
  PID:1132
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3596 -s 784
  2⤵
  - Program crash
  PID:4948
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3596 -s 840
  2⤵
  - Program crash
  PID:1212
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3596 -s 928
  2⤵
  - Program crash
  PID:4572
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3596 -s 928
  2⤵
  - Program crash
  PID:3796
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3596 -s 1048
  2⤵
  - Program crash
  PID:1588
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3596 -s 1620
  2⤵
  - Program crash
  PID:600
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c taskkill /im "4b8129293d30068cbd4c2064950b12fd28aa7e92486cd4cf41d008e07188bbef.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\4b8129293d30068cbd4c2064950b12fd28aa7e92486cd4cf41d008e07188bbef.exe" & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1528
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "4b8129293d30068cbd4c2064950b12fd28aa7e92486cd4cf41d008e07188bbef.exe" /f
    3⤵
    - System Location Discovery: System Language Discovery
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:5004
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3596 -s 1584
  2⤵
  - Program crash
  PID:1608

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 3596 -ip 3596
1⤵
PID:2072

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 492 -p 3596 -ip 3596
1⤵
PID:2448

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 520 -p 3596 -ip 3596
1⤵
PID:2044

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 3596 -ip 3596
1⤵
PID:4512

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 524 -p 3596 -ip 3596
1⤵
PID:2608

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 3596 -ip 3596
1⤵
PID:680

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 520 -p 3596 -ip 3596
1⤵
PID:4032

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 532 -p 3596 -ip 3596
1⤵
PID:676

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --field-trial-handle=4396,i,7447299413640964517,4240724842020506306,262144 --variations-seed-version --mojo-platform-channel-handle=3872 /prefetch:8
1⤵
PID:3680

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 520 -p 3596 -ip 3596
1⤵
PID:1588

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 552 -p 3596 -ip 3596
1⤵
PID:3644

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\0KP8BKDN\download[1].htm

Filesize
1B

MD5
cfcd208495d565ef66e7dff9f98764da

SHA1
b6589fc6ab0dc82cf12099d1c2d40ab994e8410c

SHA256
5feceb66ffc86f38d952786c6d696c79c2dbc239dd4e91b46729d73a27fb57e9

SHA512
31bca02094eb78126a517b206a88c73cfa9ec6f704c7030d18212cace820f025f00bf0ea68dbf3f3a5436ca63b53bf7bf80ad8d5de7d8359d0b7fed9dbc3ab99

Download Submit
memory/3596-1-0x0000000002690000-0x0000000002790000-memory.dmp

Filesize
1024KB

Download
memory/3596-2-0x0000000002620000-0x000000000265B000-memory.dmp

Filesize
236KB

Download
memory/3596-3-0x0000000000400000-0x000000000043F000-memory.dmp

Filesize
252KB

Download
memory/3596-7-0x0000000002690000-0x0000000002790000-memory.dmp

Filesize
1024KB

Download
memory/3596-8-0x0000000000400000-0x0000000002477000-memory.dmp

Filesize
32.5MB

Download
memory/3596-9-0x0000000002620000-0x000000000265B000-memory.dmp

Filesize
236KB

Download
memory/3596-10-0x0000000000400000-0x000000000043F000-memory.dmp

Filesize
252KB

Download
memory/3596-12-0x0000000010000000-0x000000001001C000-memory.dmp

Filesize
112KB

Download
memory/3596-31-0x0000000000400000-0x0000000002477000-memory.dmp

Filesize
32.5MB

Download
memory/3596-39-0x0000000000400000-0x000000000043F000-memory.dmp

Filesize
252KB

Download
memory/3596-38-0x0000000000400000-0x0000000002477000-memory.dmp

Filesize
32.5MB

Download

Analysis

Sharing