gcleaner | b1b5769191356a5d4fb8293f070e519206d24b355e5a149693c8bc4692f4b3a2

General

Target

b1b5769191356a5d4fb8293f070e519206d24b355e5a149693c8bc4692f4b3a2.exe
Size

384KB
MD5

d307f0987200f880b3eca3923bde2dea
SHA1

9e4d9a05939e6720ae1ecdff91b63c19ebaec493
SHA256

b1b5769191356a5d4fb8293f070e519206d24b355e5a149693c8bc4692f4b3a2
SHA512

bf4c326acbc2c09c8de62b9e9170d4f8d77a6ff96150410bbce73f93978d53e975303a61c86c751fdb7fe3c342d63fd480cdf21eaefa3d25f17710a69ca475cd
SSDEEP

6144:uEXzk02epMYWz2mxinarojXRkK8eSzfr//D2Z98hD2af:uv0RmY42mgaro1kKMzr/SZahC

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-1-5-21-523280732-2327480845-3730041215-1000\Control Panel\International\Geo\Nation	b1b5769191356a5d4fb8293f070e519206d24b355e5a149693c8bc4692f4b3a2.exe

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
2052	3720	WerFault.exe	82
716	3720	WerFault.exe	82
5036	3720	WerFault.exe	82
3164	3720	WerFault.exe	82
3968	3720	WerFault.exe	82
1640	3720	WerFault.exe	82
1612	3720	WerFault.exe	82
2360	3720	WerFault.exe	82
4684	3720	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	b1b5769191356a5d4fb8293f070e519206d24b355e5a149693c8bc4692f4b3a2.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
3120	taskkill.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3120	taskkill.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3720 wrote to memory of 1356	3720	b1b5769191356a5d4fb8293f070e519206d24b355e5a149693c8bc4692f4b3a2.exe	111
PID 3720 wrote to memory of 1356	3720	b1b5769191356a5d4fb8293f070e519206d24b355e5a149693c8bc4692f4b3a2.exe	111
PID 3720 wrote to memory of 1356	3720	b1b5769191356a5d4fb8293f070e519206d24b355e5a149693c8bc4692f4b3a2.exe	111
PID 1356 wrote to memory of 3120	1356	cmd.exe	115
PID 1356 wrote to memory of 3120	1356	cmd.exe	115
PID 1356 wrote to memory of 3120	1356	cmd.exe	115

C:\Users\Admin\AppData\Local\Temp\b1b5769191356a5d4fb8293f070e519206d24b355e5a149693c8bc4692f4b3a2.exe
"C:\Users\Admin\AppData\Local\Temp\b1b5769191356a5d4fb8293f070e519206d24b355e5a149693c8bc4692f4b3a2.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3720
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3720 -s 740
  2⤵
  - Program crash
  PID:2052
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3720 -s 780
  2⤵
  - Program crash
  PID:716
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3720 -s 740
  2⤵
  - Program crash
  PID:5036
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3720 -s 772
  2⤵
  - Program crash
  PID:3164
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3720 -s 904
  2⤵
  - Program crash
  PID:3968
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3720 -s 980
  2⤵
  - Program crash
  PID:1640
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3720 -s 1044
  2⤵
  - Program crash
  PID:1612
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3720 -s 1340
  2⤵
  - Program crash
  PID:2360
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c taskkill /im "b1b5769191356a5d4fb8293f070e519206d24b355e5a149693c8bc4692f4b3a2.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\b1b5769191356a5d4fb8293f070e519206d24b355e5a149693c8bc4692f4b3a2.exe" & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1356
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "b1b5769191356a5d4fb8293f070e519206d24b355e5a149693c8bc4692f4b3a2.exe" /f
    3⤵
    - System Location Discovery: System Language Discovery
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:3120
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3720 -s 1444
  2⤵
  - Program crash
  PID:4684

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 3720 -ip 3720
1⤵
PID:5024

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 3720 -ip 3720
1⤵
PID:4592

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 480 -p 3720 -ip 3720
1⤵
PID:4848

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 472 -p 3720 -ip 3720
1⤵
PID:2724

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 480 -p 3720 -ip 3720
1⤵
PID:4636

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3720 -ip 3720
1⤵
PID:1260

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 544 -p 3720 -ip 3720
1⤵
PID:2220

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 548 -p 3720 -ip 3720
1⤵
PID:116

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 568 -p 3720 -ip 3720
1⤵
PID:4468

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

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\IE\3GJVVK7B\download[1].htm

Filesize
1B

MD5
cfcd208495d565ef66e7dff9f98764da

SHA1
b6589fc6ab0dc82cf12099d1c2d40ab994e8410c

SHA256
5feceb66ffc86f38d952786c6d696c79c2dbc239dd4e91b46729d73a27fb57e9

SHA512
31bca02094eb78126a517b206a88c73cfa9ec6f704c7030d18212cace820f025f00bf0ea68dbf3f3a5436ca63b53bf7bf80ad8d5de7d8359d0b7fed9dbc3ab99

Download Submit
memory/3720-1-0x0000000002750000-0x0000000002850000-memory.dmp

Filesize
1024KB

Download
memory/3720-2-0x0000000002710000-0x000000000273D000-memory.dmp

Filesize
180KB

Download
memory/3720-3-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/3720-8-0x0000000002750000-0x0000000002850000-memory.dmp

Filesize
1024KB

Download
memory/3720-11-0x0000000002710000-0x000000000273D000-memory.dmp

Filesize
180KB

Download
memory/3720-10-0x0000000000400000-0x0000000002478000-memory.dmp

Filesize
32.5MB

Download
memory/3720-12-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/3720-22-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/3720-21-0x0000000000400000-0x0000000002478000-memory.dmp

Filesize
32.5MB

Download

Analysis

Sharing