gcleaner | bf73856cac4b5c8266eced1899abfdede6f16629afb65710dd03c66bdc846bab

General

Target

bf73856cac4b5c8266eced1899abfdede6f16629afb65710dd03c66bdc846bab.exe
Size

380KB
MD5

cc83e32987e75b20c078b9c70cb08806
SHA1

adf7cc4c1cfd9086341bbd1985e8c696fad2e090
SHA256

bf73856cac4b5c8266eced1899abfdede6f16629afb65710dd03c66bdc846bab
SHA512

13a7bf24c40a7685361e253d47d3506b11eb55757a6139770e520ff51f55bd6ec85a6d06cbb1b96e44057f6a83840e448dcd9451c4e8d79a7a53db677c2c4a81
SSDEEP

6144:WBcEmNbYTo7ZICmCz7kTT0Oe+I4vY4hWc/Vf:W9KbYYBwZIYhW

Score

10^/10

gcleaner discovery loader

Malware Config

Extracted

Family

gcleaner

C2

80.66.75.114

Signatures

GCleaner
GCleaner is a Pay-Per-Install malware loader first discovered in early 2019.
loader gcleaner

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-1-5-21-786284298-625481688-3210388970-1000\Control Panel\International\Geo\Nation	bf73856cac4b5c8266eced1899abfdede6f16629afb65710dd03c66bdc846bab.exe

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

System Information Discovery
T1082

Program crash 8 IoCs

pid	pid_target	Process	procid_target
116	1476	WerFault.exe	82
2868	1476	WerFault.exe	82
2484	1476	WerFault.exe	82
512	1476	WerFault.exe	82
888	1476	WerFault.exe	82
4928	1476	WerFault.exe	82
4176	1476	WerFault.exe	82
3736	1476	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	taskkill.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	bf73856cac4b5c8266eced1899abfdede6f16629afb65710dd03c66bdc846bab.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Kills process with taskkill 1 IoCs

evasion

pid	Process
2764	taskkill.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2764	taskkill.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1476 wrote to memory of 3956	1476	bf73856cac4b5c8266eced1899abfdede6f16629afb65710dd03c66bdc846bab.exe	108
PID 1476 wrote to memory of 3956	1476	bf73856cac4b5c8266eced1899abfdede6f16629afb65710dd03c66bdc846bab.exe	108
PID 1476 wrote to memory of 3956	1476	bf73856cac4b5c8266eced1899abfdede6f16629afb65710dd03c66bdc846bab.exe	108
PID 3956 wrote to memory of 2764	3956	cmd.exe	112
PID 3956 wrote to memory of 2764	3956	cmd.exe	112
PID 3956 wrote to memory of 2764	3956	cmd.exe	112

C:\Users\Admin\AppData\Local\Temp\bf73856cac4b5c8266eced1899abfdede6f16629afb65710dd03c66bdc846bab.exe
"C:\Users\Admin\AppData\Local\Temp\bf73856cac4b5c8266eced1899abfdede6f16629afb65710dd03c66bdc846bab.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1476
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1476 -s 740
  2⤵
  - Program crash
  PID:116
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1476 -s 780
  2⤵
  - Program crash
  PID:2868
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1476 -s 800
  2⤵
  - Program crash
  PID:2484
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1476 -s 808
  2⤵
  - Program crash
  PID:512
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1476 -s 892
  2⤵
  - Program crash
  PID:888
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1476 -s 980
  2⤵
  - Program crash
  PID:4928
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1476 -s 1444
  2⤵
  - Program crash
  PID:4176
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c taskkill /im "bf73856cac4b5c8266eced1899abfdede6f16629afb65710dd03c66bdc846bab.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\bf73856cac4b5c8266eced1899abfdede6f16629afb65710dd03c66bdc846bab.exe" & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3956
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "bf73856cac4b5c8266eced1899abfdede6f16629afb65710dd03c66bdc846bab.exe" /f
    3⤵
    - System Location Discovery: System Language Discovery
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:2764
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1476 -s 1524
  2⤵
  - Program crash
  PID:3736

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 1476 -ip 1476
1⤵
PID:4788

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 424 -p 1476 -ip 1476
1⤵
PID:100

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 1476 -ip 1476
1⤵
PID:2528

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 500 -p 1476 -ip 1476
1⤵
PID:3528

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 412 -p 1476 -ip 1476
1⤵
PID:3784

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 184 -p 1476 -ip 1476
1⤵
PID:4756

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 548 -p 1476 -ip 1476
1⤵
PID:3416

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 424 -p 1476 -ip 1476
1⤵
PID:2016

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\YYI0S376\download[1].htm

Filesize
1B

MD5
cfcd208495d565ef66e7dff9f98764da

SHA1
b6589fc6ab0dc82cf12099d1c2d40ab994e8410c

SHA256
5feceb66ffc86f38d952786c6d696c79c2dbc239dd4e91b46729d73a27fb57e9

SHA512
31bca02094eb78126a517b206a88c73cfa9ec6f704c7030d18212cace820f025f00bf0ea68dbf3f3a5436ca63b53bf7bf80ad8d5de7d8359d0b7fed9dbc3ab99

Download Submit
memory/1476-2-0x0000000002620000-0x000000000264D000-memory.dmp

Filesize
180KB

Download
memory/1476-1-0x00000000026C0000-0x00000000027C0000-memory.dmp

Filesize
1024KB

Download
memory/1476-3-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/1476-8-0x00000000026C0000-0x00000000027C0000-memory.dmp

Filesize
1024KB

Download
memory/1476-11-0x0000000002620000-0x000000000264D000-memory.dmp

Filesize
180KB

Download
memory/1476-10-0x0000000000400000-0x0000000002477000-memory.dmp

Filesize
32.5MB

Download
memory/1476-12-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/1476-22-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/1476-21-0x0000000000400000-0x0000000002477000-memory.dmp

Filesize
32.5MB

Download

Analysis

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