gcleaner | 1f3c7bcb3093be3009ec574c0009e351eab1783bb519656e5553476d9ce320d4

General

Target

1f3c7bcb3093be3009ec574c0009e351eab1783bb519656e5553476d9ce320d4.exe
Size

310KB
MD5

7d429f1499cfe97fdaeec8922f037f64
SHA1

5776ff79b69f7546549ffa420d5f22242c95b762
SHA256

1f3c7bcb3093be3009ec574c0009e351eab1783bb519656e5553476d9ce320d4
SHA512

4bb284dd6dc61fe7ab66362a0f832d2c83a6e7c4af2f210a592ab0effa1b4277c76fee33828b4221c2047a479ca0023dd0335bb08f659474eeb90d2d0af8a177
SSDEEP

6144:vIc1ARgH9xUs9w1VlrhAv7Ars+ZlV9CcProUMD:vIjRgdHZAscProU

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 9 IoCs

pid	pid_target	Process	procid_target
1668	4148	WerFault.exe	77
4840	4148	WerFault.exe	77
3132	4148	WerFault.exe	77
4548	4148	WerFault.exe	77
3004	4148	WerFault.exe	77
1148	4148	WerFault.exe	77
1560	4148	WerFault.exe	77
2576	4148	WerFault.exe	77
4440	4148	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	1f3c7bcb3093be3009ec574c0009e351eab1783bb519656e5553476d9ce320d4.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
3948	taskkill.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3948	taskkill.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4148 wrote to memory of 3944	4148	1f3c7bcb3093be3009ec574c0009e351eab1783bb519656e5553476d9ce320d4.exe	95
PID 4148 wrote to memory of 3944	4148	1f3c7bcb3093be3009ec574c0009e351eab1783bb519656e5553476d9ce320d4.exe	95
PID 4148 wrote to memory of 3944	4148	1f3c7bcb3093be3009ec574c0009e351eab1783bb519656e5553476d9ce320d4.exe	95
PID 3944 wrote to memory of 3948	3944	cmd.exe	99
PID 3944 wrote to memory of 3948	3944	cmd.exe	99
PID 3944 wrote to memory of 3948	3944	cmd.exe	99

C:\Users\Admin\AppData\Local\Temp\1f3c7bcb3093be3009ec574c0009e351eab1783bb519656e5553476d9ce320d4.exe
"C:\Users\Admin\AppData\Local\Temp\1f3c7bcb3093be3009ec574c0009e351eab1783bb519656e5553476d9ce320d4.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4148
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4148 -s 476
  2⤵
  - Program crash
  PID:1668
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4148 -s 796
  2⤵
  - Program crash
  PID:4840
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4148 -s 836
  2⤵
  - Program crash
  PID:3132
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4148 -s 852
  2⤵
  - Program crash
  PID:4548
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4148 -s 868
  2⤵
  - Program crash
  PID:3004
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4148 -s 976
  2⤵
  - Program crash
  PID:1148
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4148 -s 980
  2⤵
  - Program crash
  PID:1560
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4148 -s 1788
  2⤵
  - Program crash
  PID:2576
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c taskkill /im "1f3c7bcb3093be3009ec574c0009e351eab1783bb519656e5553476d9ce320d4.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\1f3c7bcb3093be3009ec574c0009e351eab1783bb519656e5553476d9ce320d4.exe" & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3944
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "1f3c7bcb3093be3009ec574c0009e351eab1783bb519656e5553476d9ce320d4.exe" /f
    3⤵
    - System Location Discovery: System Language Discovery
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:3948
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4148 -s 488
  2⤵
  - Program crash
  PID:4440

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4148 -ip 4148
1⤵
PID:4824

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 424 -p 4148 -ip 4148
1⤵
PID:2776

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 356 -p 4148 -ip 4148
1⤵
PID:4864

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 516 -p 4148 -ip 4148
1⤵
PID:1924

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 4148 -ip 4148
1⤵
PID:2192

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 424 -p 4148 -ip 4148
1⤵
PID:5064

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 480 -p 4148 -ip 4148
1⤵
PID:3980

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 508 -p 4148 -ip 4148
1⤵
PID:1208

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 520 -p 4148 -ip 4148
1⤵
PID:4508

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\JL3S1NU9\download[1].htm

Filesize
1B

MD5
cfcd208495d565ef66e7dff9f98764da

SHA1
b6589fc6ab0dc82cf12099d1c2d40ab994e8410c

SHA256
5feceb66ffc86f38d952786c6d696c79c2dbc239dd4e91b46729d73a27fb57e9

SHA512
31bca02094eb78126a517b206a88c73cfa9ec6f704c7030d18212cace820f025f00bf0ea68dbf3f3a5436ca63b53bf7bf80ad8d5de7d8359d0b7fed9dbc3ab99

Download Submit
memory/4148-1-0x00000000029A0000-0x0000000002AA0000-memory.dmp

Filesize
1024KB

Download
memory/4148-2-0x0000000004600000-0x000000000463B000-memory.dmp

Filesize
236KB

Download
memory/4148-3-0x0000000000400000-0x000000000043F000-memory.dmp

Filesize
252KB

Download
memory/4148-8-0x0000000010000000-0x000000001001C000-memory.dmp

Filesize
112KB

Download
memory/4148-13-0x00000000029A0000-0x0000000002AA0000-memory.dmp

Filesize
1024KB

Download
memory/4148-15-0x0000000004600000-0x000000000463B000-memory.dmp

Filesize
236KB

Download
memory/4148-17-0x0000000000400000-0x000000000043F000-memory.dmp

Filesize
252KB

Download
memory/4148-16-0x0000000000400000-0x000000000279E000-memory.dmp

Filesize
35.6MB

Download
memory/4148-34-0x0000000000400000-0x000000000279E000-memory.dmp

Filesize
35.6MB

Download
memory/4148-36-0x0000000000400000-0x000000000043F000-memory.dmp

Filesize
252KB

Download

Analysis

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