gcleaner | bb59713d6dbe3e5f28870e0bdcc9b49d0002ca398b37487735b2f1758553fea2

General

Target

bb59713d6dbe3e5f28870e0bdcc9b49d0002ca398b37487735b2f1758553fea2.exe
Size

439KB
MD5

c8be510dfe2d9af32045b559496e4042
SHA1

b4c76babf91db8a6e19b7c3dec52da439c67b8a8
SHA256

bb59713d6dbe3e5f28870e0bdcc9b49d0002ca398b37487735b2f1758553fea2
SHA512

c3492fddd3b8ccf1530b8b23cda896c73099e157401675a8b2b76c55aaaa8e854f654904ec06f0fbd1ffb5b552691a8ddc11de6551e21d2703264377ff9247ce
SSDEEP

3072:UJtpmuVmHcWw0dfLROn/BdKxbk4Pe+7tpmcivOTGsFOp1W7rZ2meLAgtol5OjjKc:ItRVmHcWHdf0KVHiv+OpsYvZoOK+l8O

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-1-5-21-1194130065-3471212556-1656947724-1000\Control Panel\International\Geo\Nation	bb59713d6dbe3e5f28870e0bdcc9b49d0002ca398b37487735b2f1758553fea2.exe

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

System Information Discovery
T1082

Program crash 11 IoCs

pid	pid_target	Process	procid_target
2176	4120	WerFault.exe	82
2508	4120	WerFault.exe	82
1860	4120	WerFault.exe	82
1804	4120	WerFault.exe	82
4104	4120	WerFault.exe	82
1812	4120	WerFault.exe	82
4424	4120	WerFault.exe	82
4392	4120	WerFault.exe	82
5072	4120	WerFault.exe	82
1824	4120	WerFault.exe	82
4952	4120	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	bb59713d6dbe3e5f28870e0bdcc9b49d0002ca398b37487735b2f1758553fea2.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
2016	taskkill.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2016	taskkill.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4120 wrote to memory of 1456	4120	bb59713d6dbe3e5f28870e0bdcc9b49d0002ca398b37487735b2f1758553fea2.exe	117
PID 4120 wrote to memory of 1456	4120	bb59713d6dbe3e5f28870e0bdcc9b49d0002ca398b37487735b2f1758553fea2.exe	117
PID 4120 wrote to memory of 1456	4120	bb59713d6dbe3e5f28870e0bdcc9b49d0002ca398b37487735b2f1758553fea2.exe	117
PID 1456 wrote to memory of 2016	1456	cmd.exe	120
PID 1456 wrote to memory of 2016	1456	cmd.exe	120
PID 1456 wrote to memory of 2016	1456	cmd.exe	120

C:\Users\Admin\AppData\Local\Temp\bb59713d6dbe3e5f28870e0bdcc9b49d0002ca398b37487735b2f1758553fea2.exe
"C:\Users\Admin\AppData\Local\Temp\bb59713d6dbe3e5f28870e0bdcc9b49d0002ca398b37487735b2f1758553fea2.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4120
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4120 -s 456
  2⤵
  - Program crash
  PID:2176
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4120 -s 504
  2⤵
  - Program crash
  PID:2508
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4120 -s 756
  2⤵
  - Program crash
  PID:1860
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4120 -s 788
  2⤵
  - Program crash
  PID:1804
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4120 -s 788
  2⤵
  - Program crash
  PID:4104
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4120 -s 844
  2⤵
  - Program crash
  PID:1812
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4120 -s 912
  2⤵
  - Program crash
  PID:4424
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4120 -s 988
  2⤵
  - Program crash
  PID:4392
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4120 -s 1032
  2⤵
  - Program crash
  PID:5072
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4120 -s 1596
  2⤵
  - Program crash
  PID:1824
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c taskkill /im "bb59713d6dbe3e5f28870e0bdcc9b49d0002ca398b37487735b2f1758553fea2.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\bb59713d6dbe3e5f28870e0bdcc9b49d0002ca398b37487735b2f1758553fea2.exe" & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1456
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "bb59713d6dbe3e5f28870e0bdcc9b49d0002ca398b37487735b2f1758553fea2.exe" /f
    3⤵
    - System Location Discovery: System Language Discovery
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:2016
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4120 -s 1560
  2⤵
  - Program crash
  PID:4952

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 180 -p 4120 -ip 4120
1⤵
PID:668

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 4120 -ip 4120
1⤵
PID:1944

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 564 -p 4120 -ip 4120
1⤵
PID:3316

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 568 -p 4120 -ip 4120
1⤵
PID:968

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 588 -p 4120 -ip 4120
1⤵
PID:2652

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 556 -p 4120 -ip 4120
1⤵
PID:4460

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 604 -p 4120 -ip 4120
1⤵
PID:428

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 616 -p 4120 -ip 4120
1⤵
PID:1200

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 608 -p 4120 -ip 4120
1⤵
PID:2392

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 624 -p 4120 -ip 4120
1⤵
PID:1728

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 648 -p 4120 -ip 4120
1⤵
PID:3620

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\6809OHQ0\download[1].htm

Filesize
1B

MD5
cfcd208495d565ef66e7dff9f98764da

SHA1
b6589fc6ab0dc82cf12099d1c2d40ab994e8410c

SHA256
5feceb66ffc86f38d952786c6d696c79c2dbc239dd4e91b46729d73a27fb57e9

SHA512
31bca02094eb78126a517b206a88c73cfa9ec6f704c7030d18212cace820f025f00bf0ea68dbf3f3a5436ca63b53bf7bf80ad8d5de7d8359d0b7fed9dbc3ab99

Download Submit
memory/4120-1-0x0000000002760000-0x0000000002860000-memory.dmp

Filesize
1024KB

Download
memory/4120-2-0x00000000026F0000-0x000000000272B000-memory.dmp

Filesize
236KB

Download
memory/4120-3-0x0000000000400000-0x000000000043F000-memory.dmp

Filesize
252KB

Download
memory/4120-8-0x0000000010000000-0x000000001001C000-memory.dmp

Filesize
112KB

Download
memory/4120-13-0x0000000002760000-0x0000000002860000-memory.dmp

Filesize
1024KB

Download
memory/4120-16-0x00000000026F0000-0x000000000272B000-memory.dmp

Filesize
236KB

Download
memory/4120-15-0x0000000000400000-0x0000000002487000-memory.dmp

Filesize
32.5MB

Download
memory/4120-17-0x0000000000400000-0x000000000043F000-memory.dmp

Filesize
252KB

Download
memory/4120-29-0x0000000000400000-0x0000000002487000-memory.dmp

Filesize
32.5MB

Download
memory/4120-36-0x0000000000400000-0x000000000043F000-memory.dmp

Filesize
252KB

Download
memory/4120-35-0x0000000000400000-0x0000000002487000-memory.dmp

Filesize
32.5MB

Download

Analysis

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