gcleaner | d19a0b4f78aa97f1c6a59df8759630b33714efce7a436b5327a7ca08c2cbb64b

General

Target

66da2fce1b9eb472cf52d47a3ed5d5ccf8fb1bd15b9b6dc809ac6a913a6f4c36.exe
Size

2.5MB
MD5

610c2597ef8c38dd051382291134cec5
SHA1

30f8795164de19201eb3f9334ebf05261587a038
SHA256

66da2fce1b9eb472cf52d47a3ed5d5ccf8fb1bd15b9b6dc809ac6a913a6f4c36
SHA512

cfb1a782e2f17babbbd4f3205a31b9a74758abab7120f4015bbd4d3154a58b1c9ce67048d9c99ea6bf2db1a0c591ec4ed9a513868fed45370546f1014e0b6792
SSDEEP

49152:Z2G9By3esCTp2WInd7SU1WM5x9L+AZ7KxTRn76K5e7mANjNRA5hq:MG943xCTp2WIndPHzL+AsNf5eaANgDq

Score

10^/10

gcleaner discovery loader

Malware Config

Extracted

Family

gcleaner

C2

45.139.105.171

85.31.46.167

107.182.129.235

171.22.30.106

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
2684	is-G3OHH.tmp
2692	fbsearcher62.exe

Loads dropped DLL 5 IoCs

pid	Process
2536	66da2fce1b9eb472cf52d47a3ed5d5ccf8fb1bd15b9b6dc809ac6a913a6f4c36.exe
2684	is-G3OHH.tmp
2684	is-G3OHH.tmp
2684	is-G3OHH.tmp
2684	is-G3OHH.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 12 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\fbSearcher\is-0JMC8.tmp	is-G3OHH.tmp
File created	C:\Program Files (x86)\fbSearcher\is-IFDNE.tmp	is-G3OHH.tmp
File opened for modification	C:\Program Files (x86)\fbSearcher\fbsearcher62.exe	is-G3OHH.tmp
File created	C:\Program Files (x86)\fbSearcher\is-EQ4UH.tmp	is-G3OHH.tmp
File created	C:\Program Files (x86)\fbSearcher\is-80E55.tmp	is-G3OHH.tmp
File created	C:\Program Files (x86)\fbSearcher\is-SPCGB.tmp	is-G3OHH.tmp
File created	C:\Program Files (x86)\fbSearcher\is-U3C4L.tmp	is-G3OHH.tmp
File created	C:\Program Files (x86)\fbSearcher\is-8J60F.tmp	is-G3OHH.tmp
File created	C:\Program Files (x86)\fbSearcher\is-6G60M.tmp	is-G3OHH.tmp
File opened for modification	C:\Program Files (x86)\fbSearcher\unins000.dat	is-G3OHH.tmp
File created	C:\Program Files (x86)\fbSearcher\unins000.dat	is-G3OHH.tmp
File created	C:\Program Files (x86)\fbSearcher\is-2NJNB.tmp	is-G3OHH.tmp

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

System Information Discovery
T1082

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	66da2fce1b9eb472cf52d47a3ed5d5ccf8fb1bd15b9b6dc809ac6a913a6f4c36.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	is-G3OHH.tmp
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	fbsearcher62.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2692	fbsearcher62.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 2536 wrote to memory of 2684	2536	66da2fce1b9eb472cf52d47a3ed5d5ccf8fb1bd15b9b6dc809ac6a913a6f4c36.exe	30
PID 2536 wrote to memory of 2684	2536	66da2fce1b9eb472cf52d47a3ed5d5ccf8fb1bd15b9b6dc809ac6a913a6f4c36.exe	30
PID 2536 wrote to memory of 2684	2536	66da2fce1b9eb472cf52d47a3ed5d5ccf8fb1bd15b9b6dc809ac6a913a6f4c36.exe	30
PID 2536 wrote to memory of 2684	2536	66da2fce1b9eb472cf52d47a3ed5d5ccf8fb1bd15b9b6dc809ac6a913a6f4c36.exe	30
PID 2536 wrote to memory of 2684	2536	66da2fce1b9eb472cf52d47a3ed5d5ccf8fb1bd15b9b6dc809ac6a913a6f4c36.exe	30
PID 2536 wrote to memory of 2684	2536	66da2fce1b9eb472cf52d47a3ed5d5ccf8fb1bd15b9b6dc809ac6a913a6f4c36.exe	30
PID 2536 wrote to memory of 2684	2536	66da2fce1b9eb472cf52d47a3ed5d5ccf8fb1bd15b9b6dc809ac6a913a6f4c36.exe	30
PID 2684 wrote to memory of 2692	2684	is-G3OHH.tmp	31
PID 2684 wrote to memory of 2692	2684	is-G3OHH.tmp	31
PID 2684 wrote to memory of 2692	2684	is-G3OHH.tmp	31
PID 2684 wrote to memory of 2692	2684	is-G3OHH.tmp	31

C:\Users\Admin\AppData\Local\Temp\66da2fce1b9eb472cf52d47a3ed5d5ccf8fb1bd15b9b6dc809ac6a913a6f4c36.exe
"C:\Users\Admin\AppData\Local\Temp\66da2fce1b9eb472cf52d47a3ed5d5ccf8fb1bd15b9b6dc809ac6a913a6f4c36.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2536
- C:\Users\Admin\AppData\Local\Temp\is-4AHKD.tmp\is-G3OHH.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-4AHKD.tmp\is-G3OHH.tmp" /SL4 $50148 "C:\Users\Admin\AppData\Local\Temp\66da2fce1b9eb472cf52d47a3ed5d5ccf8fb1bd15b9b6dc809ac6a913a6f4c36.exe" 2339772 52736
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2684
- - C:\Program Files (x86)\fbSearcher\fbsearcher62.exe
    "C:\Program Files (x86)\fbSearcher\fbsearcher62.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: GetForegroundWindowSpam
    PID:2692

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

\Program Files (x86)\fbSearcher\fbsearcher62.exe

Filesize
3.8MB

MD5
810ae94a2ee145fcf5deaefe6b0e43d7

SHA1
197cc4a5a6e4a990f06ade44c91aab4acc76aae4

SHA256
6fea617fe6231a5ef018b78f4d8e412ea9eaee11493362dbda0f237d33cd1cf9

SHA512
51fc640ca96855702729abbd0592c8e2ffb9e9b220375130297860f6611c0916a20feeaa6cb4b1427954037b8df254949d82c11fbaac8837a37d5fedd06b9384

Download Submit
\Users\Admin\AppData\Local\Temp\is-4AHKD.tmp\is-G3OHH.tmp

Filesize
657KB

MD5
7cd12c54a9751ca6eee6ab0c85fb68f5

SHA1
76562e9b7888b6d20d67addb5a90b68b54a51987

SHA256
e82cabb027db8846c3430be760f137afa164c36f9e1b93a6e34c96de0b2c5a5f

SHA512
27ba5d2f719aaac2ead6fb42f23af3aa866f75026be897cd2f561f3e383904e89e6043bd22b4ae24f69787bd258a68ff696c09c03d656cbf7c79c2a52d8d82cc

Download Submit
\Users\Admin\AppData\Local\Temp\is-DHTUP.tmp\_isetup\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
\Users\Admin\AppData\Local\Temp\is-DHTUP.tmp\_isetup\_shfoldr.dll

Filesize
22KB

MD5
92dc6ef532fbb4a5c3201469a5b5eb63

SHA1
3e89ff837147c16b4e41c30d6c796374e0b8e62c

SHA256
9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

SHA512
9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

Download Submit
memory/2536-48-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2536-2-0x0000000000401000-0x000000000040B000-memory.dmp

Filesize
40KB

Download
memory/2536-0-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2684-9-0x0000000000400000-0x00000000004B3000-memory.dmp

Filesize
716KB

Download
memory/2684-47-0x0000000000400000-0x00000000004B3000-memory.dmp

Filesize
716KB

Download
memory/2684-44-0x00000000033D0000-0x0000000004599000-memory.dmp

Filesize
17.8MB

Download
memory/2684-49-0x00000000033D0000-0x0000000004599000-memory.dmp

Filesize
17.8MB

Download
memory/2692-45-0x0000000000400000-0x00000000015C9000-memory.dmp

Filesize
17.8MB

Download
memory/2692-46-0x0000000000400000-0x00000000015C9000-memory.dmp

Filesize
17.8MB

Download
memory/2692-51-0x0000000000400000-0x00000000015C9000-memory.dmp

Filesize
17.8MB

Download
memory/2692-52-0x0000000000400000-0x00000000015C9000-memory.dmp

Filesize
17.8MB

Download

Analysis

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