gcleaner | 39fe572c144a5d69532b1cdc4a891498039f3dc450f62156d9d21634fb140cf9

General

Target

ac4e985b34d784c983669f7dba6018048d35a156627dade5c1440167d5adc5ca.exe
Size

299KB
MD5

e74f77626d857bc78ed253336e06f5f3
SHA1

7857266e43f3d7843c4a70f8817ebd873049f247
SHA256

ac4e985b34d784c983669f7dba6018048d35a156627dade5c1440167d5adc5ca
SHA512

9cd4dd004873a1b0d60bb9692eb2bb6716535dc0bc2db67ed55f56f2a83685c5d2721c1913581ab4ff27f1fd04dfbc1a7dc935c9e593936ca74f53dedaed9167
SSDEEP

6144:2XDogmKcmq3zvmPG0XrWdhb3dLlpgJOX/MN60Vdh1HQ:2TorDmq3zOPzXriTd3rM3Vdz

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-1-5-21-2170637797-568393320-3232933035-1000\Control Panel\International\Geo\Nation	ac4e985b34d784c983669f7dba6018048d35a156627dade5c1440167d5adc5ca.exe

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

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
316	4876	WerFault.exe	91

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	ac4e985b34d784c983669f7dba6018048d35a156627dade5c1440167d5adc5ca.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
1316	taskkill.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1316	taskkill.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4876 wrote to memory of 3104	4876	ac4e985b34d784c983669f7dba6018048d35a156627dade5c1440167d5adc5ca.exe	104
PID 4876 wrote to memory of 3104	4876	ac4e985b34d784c983669f7dba6018048d35a156627dade5c1440167d5adc5ca.exe	104
PID 4876 wrote to memory of 3104	4876	ac4e985b34d784c983669f7dba6018048d35a156627dade5c1440167d5adc5ca.exe	104
PID 3104 wrote to memory of 1316	3104	cmd.exe	108
PID 3104 wrote to memory of 1316	3104	cmd.exe	108
PID 3104 wrote to memory of 1316	3104	cmd.exe	108

C:\Users\Admin\AppData\Local\Temp\ac4e985b34d784c983669f7dba6018048d35a156627dade5c1440167d5adc5ca.exe
"C:\Users\Admin\AppData\Local\Temp\ac4e985b34d784c983669f7dba6018048d35a156627dade5c1440167d5adc5ca.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4876
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c taskkill /im "ac4e985b34d784c983669f7dba6018048d35a156627dade5c1440167d5adc5ca.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\ac4e985b34d784c983669f7dba6018048d35a156627dade5c1440167d5adc5ca.exe" & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3104
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "ac4e985b34d784c983669f7dba6018048d35a156627dade5c1440167d5adc5ca.exe" /f
    3⤵
    - System Location Discovery: System Language Discovery
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:1316
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4876 -s 1692
  2⤵
  - Program crash
  PID:316

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --field-trial-handle=1412,i,4356837537417149674,16553092232944545509,262144 --variations-seed-version --mojo-platform-channel-handle=3908 /prefetch:8
1⤵
PID:2060

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 4876 -ip 4876
1⤵
PID:4384

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\0KP8BKDN\download[1].htm

Filesize
1B

MD5
cfcd208495d565ef66e7dff9f98764da

SHA1
b6589fc6ab0dc82cf12099d1c2d40ab994e8410c

SHA256
5feceb66ffc86f38d952786c6d696c79c2dbc239dd4e91b46729d73a27fb57e9

SHA512
31bca02094eb78126a517b206a88c73cfa9ec6f704c7030d18212cace820f025f00bf0ea68dbf3f3a5436ca63b53bf7bf80ad8d5de7d8359d0b7fed9dbc3ab99

Download Submit
memory/4876-1-0x0000000000460000-0x0000000000560000-memory.dmp

Filesize
1024KB

Download
memory/4876-2-0x0000000002060000-0x000000000209B000-memory.dmp

Filesize
236KB

Download
memory/4876-3-0x0000000000400000-0x000000000043F000-memory.dmp

Filesize
252KB

Download
memory/4876-8-0x0000000010000000-0x000000001001C000-memory.dmp

Filesize
112KB

Download
memory/4876-13-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/4876-14-0x0000000000460000-0x0000000000560000-memory.dmp

Filesize
1024KB

Download
memory/4876-16-0x0000000002060000-0x000000000209B000-memory.dmp

Filesize
236KB

Download
memory/4876-18-0x0000000000400000-0x000000000043F000-memory.dmp

Filesize
252KB

Download
memory/4876-35-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/4876-36-0x0000000000400000-0x000000000043F000-memory.dmp

Filesize
252KB

Download

Analysis

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