gcleaner | 13283b116e8bf86c865dc28f08666086ed44d5aa8feb89049ccd7fb02e3c4fac

General

Target

13283b116e8bf86c865dc28f08666086ed44d5aa8feb89049ccd7fb02e3c4fac.exe
Size

1.9MB
MD5

79cd20b29db70baaeb0de7a4619cd527
SHA1

404d53dbd6779ec1be46028de45c5f74a62a1fad
SHA256

13283b116e8bf86c865dc28f08666086ed44d5aa8feb89049ccd7fb02e3c4fac
SHA512

61e1a0f82d7a7f78e62ca06d6c92b3ee7d6e5adaceb4035b08411280b741b9c96a123ee30ac4a9d38342c21f8b00c6a3a79b0873ad2ade816bb27921ff5528b8
SSDEEP

49152:dGwFJ+KLcqz5AQAstVprJyp+9uiYovdyVJGb4qP:4wFJpnnzkhi3Jb4qP

Score

10^/10

gcleaner discovery loader

Malware Config

Extracted

Family

gcleaner

C2

62.197.136.41

91.241.19.194

62.197.136.196

Attributes

url_path
/i.php

/get.php

/setup.php

/setup.php

Signatures

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

Executes dropped EXE 2 IoCs

pid	Process
4456	is-1LPE3.tmp
2200	thumbsrem.exe

Loads dropped DLL 1 IoCs

pid	Process
4456	is-1LPE3.tmp

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Drops file in Program Files directory 8 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\Mby Remover\is-523EU.tmp	is-1LPE3.tmp
File created	C:\Program Files (x86)\Mby Remover\is-FDFVS.tmp	is-1LPE3.tmp
File opened for modification	C:\Program Files (x86)\Mby Remover\unins000.dat	is-1LPE3.tmp
File opened for modification	C:\Program Files (x86)\Mby Remover\thumbsrem.exe	is-1LPE3.tmp
File created	C:\Program Files (x86)\Mby Remover\unins000.dat	is-1LPE3.tmp
File created	C:\Program Files (x86)\Mby Remover\is-NVU2U.tmp	is-1LPE3.tmp
File created	C:\Program Files (x86)\Mby Remover\is-LPVI5.tmp	is-1LPE3.tmp
File created	C:\Program Files (x86)\Mby Remover\is-7OVKD.tmp	is-1LPE3.tmp

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
64	2200	WerFault.exe	83

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	13283b116e8bf86c865dc28f08666086ed44d5aa8feb89049ccd7fb02e3c4fac.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	is-1LPE3.tmp
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	thumbsrem.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1496 wrote to memory of 4456	1496	13283b116e8bf86c865dc28f08666086ed44d5aa8feb89049ccd7fb02e3c4fac.exe	82
PID 1496 wrote to memory of 4456	1496	13283b116e8bf86c865dc28f08666086ed44d5aa8feb89049ccd7fb02e3c4fac.exe	82
PID 1496 wrote to memory of 4456	1496	13283b116e8bf86c865dc28f08666086ed44d5aa8feb89049ccd7fb02e3c4fac.exe	82
PID 4456 wrote to memory of 2200	4456	is-1LPE3.tmp	83
PID 4456 wrote to memory of 2200	4456	is-1LPE3.tmp	83
PID 4456 wrote to memory of 2200	4456	is-1LPE3.tmp	83

C:\Users\Admin\AppData\Local\Temp\13283b116e8bf86c865dc28f08666086ed44d5aa8feb89049ccd7fb02e3c4fac.exe
"C:\Users\Admin\AppData\Local\Temp\13283b116e8bf86c865dc28f08666086ed44d5aa8feb89049ccd7fb02e3c4fac.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1496
- C:\Users\Admin\AppData\Local\Temp\is-IAH14.tmp\is-1LPE3.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-IAH14.tmp\is-1LPE3.tmp" /SL4 $7002C "C:\Users\Admin\AppData\Local\Temp\13283b116e8bf86c865dc28f08666086ed44d5aa8feb89049ccd7fb02e3c4fac.exe" 1595739 135680
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4456
- - C:\Program Files (x86)\Mby Remover\thumbsrem.exe
    "C:\Program Files (x86)\Mby Remover\thumbsrem.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:2200
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 2200 -s 492
      4⤵
      Program crash
      PID:64

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 2200 -ip 2200
1⤵
PID:3936

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

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:\Program Files (x86)\Mby Remover\thumbsrem.exe

Filesize
2.2MB

MD5
9960c5c2571c1bcc7464fd66d93dc459

SHA1
e6da5e446833e3ec9a23b79531be67b05c3be1a3

SHA256
d4f072d31af6f19a5325931b8a591504e820dd67b906b539de206aa7ea3dda9a

SHA512
024200911d409ae7035680acbcddfcf030a68e8f75f281ac161cc09bf14238196c063c4e829455afe9876c731e19579549d575ea9551dd126027adc9383982e1

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-E7LG5.tmp\_isetup\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-IAH14.tmp\is-1LPE3.tmp

Filesize
739KB

MD5
668f0563f57ee5bf3addf3e666f156b4

SHA1
5234ea9e02be07139cd5b2a2387d13c05ccc6142

SHA256
299aa1f585242c903086430be67c44705617882ce0968b2e8d6c82680af92e7b

SHA512
7978e2015503b2a427d6702ddd1f99c26f9a44dee1313440afa0910d052fa71c02d2f280a033b4ef47d5b2e47b2b73c02388e7be44403d3c13661e97f03b20f6

Download Submit
memory/1496-0-0x0000000000400000-0x0000000000427000-memory.dmp

Filesize
156KB

Download
memory/1496-2-0x0000000000401000-0x000000000040A000-memory.dmp

Filesize
36KB

Download
memory/1496-38-0x0000000000400000-0x0000000000427000-memory.dmp

Filesize
156KB

Download
memory/2200-33-0x0000000000400000-0x000000000143B000-memory.dmp

Filesize
16.2MB

Download
memory/2200-32-0x0000000000400000-0x000000000143B000-memory.dmp

Filesize
16.2MB

Download
memory/2200-34-0x0000000000400000-0x000000000143B000-memory.dmp

Filesize
16.2MB

Download
memory/4456-12-0x0000000000400000-0x00000000004C7000-memory.dmp

Filesize
796KB

Download
memory/4456-37-0x0000000000400000-0x00000000004C7000-memory.dmp

Filesize
796KB

Download

Analysis

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