gcleaner | 6f55e35fed0517cdea8c9399175a83bc98b9d8f9a111fa4809f660f7918bfe3f

General

Target

6f55e35fed0517cdea8c9399175a83bc98b9d8f9a111fa4809f660f7918bfe3f.exe
Size

325KB
MD5

675c2d62ca97058633911ca9516837e1
SHA1

3b43fa9e75ad10ee0f422624fa3103d3c252f0b0
SHA256

6f55e35fed0517cdea8c9399175a83bc98b9d8f9a111fa4809f660f7918bfe3f
SHA512

62e05b44d6f8e48fbe1af502fe9347b35263383e97978a870d2dfb63d61d9a00dd7c31dd09ffd49f31033c5350af7d6cbbe1a4e6635ea00d50582779bca1adc7
SSDEEP

6144:Ofb1V/daFI6Dqkk9g6V5LL57Qy+FoM+iRSw/Q:6brdaFI6Jk91pL5MZ+iR9/

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
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
3180	1480	WerFault.exe	77
3420	1480	WerFault.exe	77
1584	1480	WerFault.exe	77
4708	1480	WerFault.exe	77
724	1480	WerFault.exe	77
1684	1480	WerFault.exe	77
4624	1480	WerFault.exe	77
3520	1480	WerFault.exe	77
2064	1480	WerFault.exe	77
2848	1480	WerFault.exe	77

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	6f55e35fed0517cdea8c9399175a83bc98b9d8f9a111fa4809f660f7918bfe3f.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
588	taskkill.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	588	taskkill.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1480 wrote to memory of 2084	1480	6f55e35fed0517cdea8c9399175a83bc98b9d8f9a111fa4809f660f7918bfe3f.exe	97
PID 1480 wrote to memory of 2084	1480	6f55e35fed0517cdea8c9399175a83bc98b9d8f9a111fa4809f660f7918bfe3f.exe	97
PID 1480 wrote to memory of 2084	1480	6f55e35fed0517cdea8c9399175a83bc98b9d8f9a111fa4809f660f7918bfe3f.exe	97
PID 2084 wrote to memory of 588	2084	cmd.exe	102
PID 2084 wrote to memory of 588	2084	cmd.exe	102
PID 2084 wrote to memory of 588	2084	cmd.exe	102

C:\Users\Admin\AppData\Local\Temp\6f55e35fed0517cdea8c9399175a83bc98b9d8f9a111fa4809f660f7918bfe3f.exe
"C:\Users\Admin\AppData\Local\Temp\6f55e35fed0517cdea8c9399175a83bc98b9d8f9a111fa4809f660f7918bfe3f.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1480
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1480 -s 476
  2⤵
  - Program crash
  PID:3180
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1480 -s 804
  2⤵
  - Program crash
  PID:3420
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1480 -s 796
  2⤵
  - Program crash
  PID:1584
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1480 -s 848
  2⤵
  - Program crash
  PID:4708
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1480 -s 868
  2⤵
  - Program crash
  PID:724
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1480 -s 976
  2⤵
  - Program crash
  PID:1684
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1480 -s 1108
  2⤵
  - Program crash
  PID:4624
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1480 -s 1144
  2⤵
  - Program crash
  PID:3520
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1480 -s 1724
  2⤵
  - Program crash
  PID:2064
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c taskkill /im "6f55e35fed0517cdea8c9399175a83bc98b9d8f9a111fa4809f660f7918bfe3f.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\6f55e35fed0517cdea8c9399175a83bc98b9d8f9a111fa4809f660f7918bfe3f.exe" & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2084
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "6f55e35fed0517cdea8c9399175a83bc98b9d8f9a111fa4809f660f7918bfe3f.exe" /f
    3⤵
    - System Location Discovery: System Language Discovery
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:588
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1480 -s 488
  2⤵
  - Program crash
  PID:2848

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 352 -p 1480 -ip 1480
1⤵
PID:2936

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 520 -p 1480 -ip 1480
1⤵
PID:4540

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 520 -p 1480 -ip 1480
1⤵
PID:1488

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 556 -p 1480 -ip 1480
1⤵
PID:1836

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 564 -p 1480 -ip 1480
1⤵
PID:2352

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 556 -p 1480 -ip 1480
1⤵
PID:3340

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 556 -p 1480 -ip 1480
1⤵
PID:4724

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 584 -p 1480 -ip 1480
1⤵
PID:776

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 596 -p 1480 -ip 1480
1⤵
PID:3640

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 628 -p 1480 -ip 1480
1⤵
PID:3096

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

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\LQOABF8X\download[1].htm

Filesize
1B

MD5
cfcd208495d565ef66e7dff9f98764da

SHA1
b6589fc6ab0dc82cf12099d1c2d40ab994e8410c

SHA256
5feceb66ffc86f38d952786c6d696c79c2dbc239dd4e91b46729d73a27fb57e9

SHA512
31bca02094eb78126a517b206a88c73cfa9ec6f704c7030d18212cace820f025f00bf0ea68dbf3f3a5436ca63b53bf7bf80ad8d5de7d8359d0b7fed9dbc3ab99

Download Submit
memory/1480-10-0x0000000000400000-0x000000000043F000-memory.dmp

Filesize
252KB

Download
memory/1480-3-0x0000000000400000-0x000000000043F000-memory.dmp

Filesize
252KB

Download
memory/1480-7-0x0000000002CF0000-0x0000000002DF0000-memory.dmp

Filesize
1024KB

Download
memory/1480-9-0x00000000049E0000-0x0000000004A1B000-memory.dmp

Filesize
236KB

Download
memory/1480-8-0x0000000000400000-0x0000000002B72000-memory.dmp

Filesize
39.4MB

Download
memory/1480-1-0x0000000002CF0000-0x0000000002DF0000-memory.dmp

Filesize
1024KB

Download
memory/1480-12-0x0000000010000000-0x000000001001C000-memory.dmp

Filesize
112KB

Download
memory/1480-2-0x00000000049E0000-0x0000000004A1B000-memory.dmp

Filesize
236KB

Download
memory/1480-29-0x0000000000400000-0x0000000002B72000-memory.dmp

Filesize
39.4MB

Download
memory/1480-40-0x0000000000400000-0x0000000002B72000-memory.dmp

Filesize
39.4MB

Download
memory/1480-42-0x0000000000400000-0x000000000043F000-memory.dmp

Filesize
252KB

Download
memory/1480-41-0x0000000000400000-0x0000000002B72000-memory.dmp

Filesize
39.4MB

Download

Analysis

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