gcleaner | 82bb3ca37dc71eaa8e41ce63b437b30fb4ca1e5df49837d77b5f8e8ba6f2ba33

General

Target

82bb3ca37dc71eaa8e41ce63b437b30fb4ca1e5df49837d77b5f8e8ba6f2ba33.exe
Size

324KB
MD5

570ea4bf0c07e1e6ee8e350611aef160
SHA1

59e54afdd82fd18c65854981a738c2d192cda8b6
SHA256

82bb3ca37dc71eaa8e41ce63b437b30fb4ca1e5df49837d77b5f8e8ba6f2ba33
SHA512

2d7b8628944ecba398e5930a374b9256b8b21ca32cb6c59981707f5499b2004904b1c2f09bb79b3a56c5e0e29f452f34728b3224abb5907d527060eb347c02fc
SSDEEP

6144:TfbDrty9JbmIgP6eP+fKtuol4gWeTjqmF/Q:jb/ty9JmV0ml4gJ68/

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-1-5-21-945322488-2060912225-3527527000-1000\Control Panel\International\Geo\Nation	82bb3ca37dc71eaa8e41ce63b437b30fb4ca1e5df49837d77b5f8e8ba6f2ba33.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
1644	4088	WerFault.exe	82
1196	4088	WerFault.exe	82
3812	4088	WerFault.exe	82
1684	4088	WerFault.exe	82
3480	4088	WerFault.exe	82
2468	4088	WerFault.exe	82
4616	4088	WerFault.exe	82
1348	4088	WerFault.exe	82
2148	4088	WerFault.exe	82
2560	4088	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	82bb3ca37dc71eaa8e41ce63b437b30fb4ca1e5df49837d77b5f8e8ba6f2ba33.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
1556	taskkill.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1556	taskkill.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4088 wrote to memory of 4564	4088	82bb3ca37dc71eaa8e41ce63b437b30fb4ca1e5df49837d77b5f8e8ba6f2ba33.exe	113
PID 4088 wrote to memory of 4564	4088	82bb3ca37dc71eaa8e41ce63b437b30fb4ca1e5df49837d77b5f8e8ba6f2ba33.exe	113
PID 4088 wrote to memory of 4564	4088	82bb3ca37dc71eaa8e41ce63b437b30fb4ca1e5df49837d77b5f8e8ba6f2ba33.exe	113
PID 4564 wrote to memory of 1556	4564	cmd.exe	117
PID 4564 wrote to memory of 1556	4564	cmd.exe	117
PID 4564 wrote to memory of 1556	4564	cmd.exe	117

C:\Users\Admin\AppData\Local\Temp\82bb3ca37dc71eaa8e41ce63b437b30fb4ca1e5df49837d77b5f8e8ba6f2ba33.exe
"C:\Users\Admin\AppData\Local\Temp\82bb3ca37dc71eaa8e41ce63b437b30fb4ca1e5df49837d77b5f8e8ba6f2ba33.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4088
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4088 -s 452
  2⤵
  - Program crash
  PID:1644
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4088 -s 476
  2⤵
  - Program crash
  PID:1196
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4088 -s 748
  2⤵
  - Program crash
  PID:3812
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4088 -s 788
  2⤵
  - Program crash
  PID:1684
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4088 -s 808
  2⤵
  - Program crash
  PID:3480
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4088 -s 836
  2⤵
  - Program crash
  PID:2468
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4088 -s 912
  2⤵
  - Program crash
  PID:4616
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4088 -s 916
  2⤵
  - Program crash
  PID:1348
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4088 -s 1544
  2⤵
  - Program crash
  PID:2148
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c taskkill /im "82bb3ca37dc71eaa8e41ce63b437b30fb4ca1e5df49837d77b5f8e8ba6f2ba33.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\82bb3ca37dc71eaa8e41ce63b437b30fb4ca1e5df49837d77b5f8e8ba6f2ba33.exe" & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4564
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "82bb3ca37dc71eaa8e41ce63b437b30fb4ca1e5df49837d77b5f8e8ba6f2ba33.exe" /f
    3⤵
    - System Location Discovery: System Language Discovery
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:1556
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4088 -s 1572
  2⤵
  - Program crash
  PID:2560

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4088 -ip 4088
1⤵
PID:4944

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 520 -p 4088 -ip 4088
1⤵
PID:4380

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 524 -p 4088 -ip 4088
1⤵
PID:1624

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 520 -p 4088 -ip 4088
1⤵
PID:3100

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 548 -p 4088 -ip 4088
1⤵
PID:4692

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 508 -p 4088 -ip 4088
1⤵
PID:1320

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 504 -p 4088 -ip 4088
1⤵
PID:4992

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 556 -p 4088 -ip 4088
1⤵
PID:2100

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 508 -p 4088 -ip 4088
1⤵
PID:3532

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 416 -p 4088 -ip 4088
1⤵
PID:4568

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\68XY2BI1\download[1].htm

Filesize
1B

MD5
cfcd208495d565ef66e7dff9f98764da

SHA1
b6589fc6ab0dc82cf12099d1c2d40ab994e8410c

SHA256
5feceb66ffc86f38d952786c6d696c79c2dbc239dd4e91b46729d73a27fb57e9

SHA512
31bca02094eb78126a517b206a88c73cfa9ec6f704c7030d18212cace820f025f00bf0ea68dbf3f3a5436ca63b53bf7bf80ad8d5de7d8359d0b7fed9dbc3ab99

Download Submit
memory/4088-1-0x00000000006C0000-0x00000000007C0000-memory.dmp

Filesize
1024KB

Download
memory/4088-2-0x0000000000600000-0x000000000063B000-memory.dmp

Filesize
236KB

Download
memory/4088-3-0x0000000000400000-0x000000000043F000-memory.dmp

Filesize
252KB

Download
memory/4088-8-0x0000000010000000-0x000000001001C000-memory.dmp

Filesize
112KB

Download
memory/4088-13-0x00000000006C0000-0x00000000007C0000-memory.dmp

Filesize
1024KB

Download
memory/4088-14-0x0000000000400000-0x0000000000458000-memory.dmp

Filesize
352KB

Download
memory/4088-16-0x0000000000600000-0x000000000063B000-memory.dmp

Filesize
236KB

Download
memory/4088-17-0x0000000000400000-0x000000000043F000-memory.dmp

Filesize
252KB

Download
memory/4088-27-0x0000000000400000-0x0000000000458000-memory.dmp

Filesize
352KB

Download
memory/4088-36-0x0000000000400000-0x000000000043F000-memory.dmp

Filesize
252KB

Download
memory/4088-35-0x0000000000400000-0x0000000000458000-memory.dmp

Filesize
352KB

Download

Analysis

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