gcleaner | e7678a0537796c6199bbc7fc5c143b475280564558250df218d62012c3b98506

General

Target

JaffaCakes118_4d255e96e5056f2c899884babcc55691.exe
Size

434KB
MD5

4d255e96e5056f2c899884babcc55691
SHA1

44caeb1df6288c94081b805ee17f66db34dc7834
SHA256

e7678a0537796c6199bbc7fc5c143b475280564558250df218d62012c3b98506
SHA512

ad2cebd784a525d3fe2e3523c4f3d2ab793da84811a41b08aae99141d9c53f545b180d36f05647ddef04bba200b6a0fc917e481913f3b2b0162c136ec8355c44
SSDEEP

12288:GeSy7hLlys4W40FVHGZyrqXNqvgWw1Y90fuzO:GkpMs4WnFQgNwC90G6

Score

10^/10

gcleaner onlylogger discovery loader

Malware Config

Extracted

Family

gcleaner

C2

gcl-gb.biz

45.9.20.13

Signatures

GCleaner
GCleaner is a Pay-Per-Install malware loader first discovered in early 2019.
loader gcleaner
Gcleaner family
gcleaner
OnlyLogger
A tiny loader that uses IPLogger to get its payload.
loader onlylogger
Onlylogger family
onlylogger

OnlyLogger payload 5 IoCs

resource	yara_rule
behavioral2/memory/3636-2-0x0000000000970000-0x00000000009B9000-memory.dmp	family_onlylogger
behavioral2/memory/3636-3-0x0000000000400000-0x000000000044C000-memory.dmp	family_onlylogger
behavioral2/memory/3636-6-0x0000000000400000-0x000000000044C000-memory.dmp	family_onlylogger
behavioral2/memory/3636-4-0x0000000000400000-0x000000000089C000-memory.dmp	family_onlylogger
behavioral2/memory/3636-5-0x0000000000970000-0x00000000009B9000-memory.dmp	family_onlylogger

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-1-5-21-1045960512-3948844814-3059691613-1000\Control Panel\International\Geo\Nation	JaffaCakes118_4d255e96e5056f2c899884babcc55691.exe

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

System Information Discovery
T1082

Program crash 7 IoCs

pid	pid_target	Process	procid_target
3480	3636	WerFault.exe	82
264	3636	WerFault.exe	82
4936	3636	WerFault.exe	82
4828	3636	WerFault.exe	82
3580	3636	WerFault.exe	82
4780	3636	WerFault.exe	82
2412	3636	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	JaffaCakes118_4d255e96e5056f2c899884babcc55691.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
5016	taskkill.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	5016	taskkill.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3636 wrote to memory of 4704	3636	JaffaCakes118_4d255e96e5056f2c899884babcc55691.exe	96
PID 3636 wrote to memory of 4704	3636	JaffaCakes118_4d255e96e5056f2c899884babcc55691.exe	96
PID 3636 wrote to memory of 4704	3636	JaffaCakes118_4d255e96e5056f2c899884babcc55691.exe	96
PID 4704 wrote to memory of 5016	4704	cmd.exe	99
PID 4704 wrote to memory of 5016	4704	cmd.exe	99
PID 4704 wrote to memory of 5016	4704	cmd.exe	99

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_4d255e96e5056f2c899884babcc55691.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_4d255e96e5056f2c899884babcc55691.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3636
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3636 -s 752
  2⤵
  - Program crash
  PID:3480
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3636 -s 784
  2⤵
  - Program crash
  PID:264
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3636 -s 928
  2⤵
  - Program crash
  PID:4936
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3636 -s 916
  2⤵
  - Program crash
  PID:4828
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3636 -s 928
  2⤵
  - Program crash
  PID:3580
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3636 -s 916
  2⤵
  - Program crash
  PID:4780
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c taskkill /im "JaffaCakes118_4d255e96e5056f2c899884babcc55691.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_4d255e96e5056f2c899884babcc55691.exe" & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4704
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "JaffaCakes118_4d255e96e5056f2c899884babcc55691.exe" /f
    3⤵
    - System Location Discovery: System Language Discovery
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:5016
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3636 -s 752
  2⤵
  - Program crash
  PID:2412

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3636 -ip 3636
1⤵
PID:4044

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 512 -p 3636 -ip 3636
1⤵
PID:4132

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 504 -p 3636 -ip 3636
1⤵
PID:5072

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 184 -p 3636 -ip 3636
1⤵
PID:2192

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 468 -p 3636 -ip 3636
1⤵
PID:2728

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 520 -p 3636 -ip 3636
1⤵
PID:4344

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 524 -p 3636 -ip 3636
1⤵
PID:4400

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

memory/3636-1-0x0000000000C00000-0x0000000000D00000-memory.dmp

Filesize
1024KB

Download
memory/3636-2-0x0000000000970000-0x00000000009B9000-memory.dmp

Filesize
292KB

Download
memory/3636-3-0x0000000000400000-0x000000000044C000-memory.dmp

Filesize
304KB

Download
memory/3636-6-0x0000000000400000-0x000000000044C000-memory.dmp

Filesize
304KB

Download
memory/3636-4-0x0000000000400000-0x000000000089C000-memory.dmp

Filesize
4.6MB

Download
memory/3636-5-0x0000000000970000-0x00000000009B9000-memory.dmp

Filesize
292KB

Download

Analysis

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