gcleaner | 32ce74485376cf707f382d526fb878624c9f5ef3f6f59ccf809c32fe90dda3f9

General

Target

3c6cbf57a00893bf5028318965d10c63fc1846b9c5ca84a4110b734eda93548f.exe
Size

2.4MB
MD5

255bfd63416a65de7a4202e03c654a1d
SHA1

71f55b7ed05b4b97c210cfa461db73816e76f623
SHA256

3c6cbf57a00893bf5028318965d10c63fc1846b9c5ca84a4110b734eda93548f
SHA512

eb7bf5ff1128c395cd72456c6b1f5dd4c802ab4a1abb3152e8999148ee2aba20da6de16695ece9d5febf0c78a9feb5ea94c64b496b3c34e26bdb72850ba26dcb
SSDEEP

49152:Z2UCv1eNdZad18sod2siewLdGQDzBKnVNLZS6CSA5hq:MUsS8j8KgQkVNQLJDq

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
376	is-T9SD2.tmp
2844	ersearcher57.exe

Loads dropped DLL 1 IoCs

pid	Process
376	is-T9SD2.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)\erSearcher\is-R1803.tmp	is-T9SD2.tmp
File created	C:\Program Files (x86)\erSearcher\is-263MH.tmp	is-T9SD2.tmp
File opened for modification	C:\Program Files (x86)\erSearcher\unins000.dat	is-T9SD2.tmp
File created	C:\Program Files (x86)\erSearcher\is-BQAJR.tmp	is-T9SD2.tmp
File created	C:\Program Files (x86)\erSearcher\is-0VIDN.tmp	is-T9SD2.tmp
File created	C:\Program Files (x86)\erSearcher\is-J4317.tmp	is-T9SD2.tmp
File created	C:\Program Files (x86)\erSearcher\is-N8DU2.tmp	is-T9SD2.tmp
File created	C:\Program Files (x86)\erSearcher\unins000.dat	is-T9SD2.tmp
File created	C:\Program Files (x86)\erSearcher\is-AQNPQ.tmp	is-T9SD2.tmp
File created	C:\Program Files (x86)\erSearcher\is-IEJSF.tmp	is-T9SD2.tmp
File created	C:\Program Files (x86)\erSearcher\is-K8R1B.tmp	is-T9SD2.tmp
File opened for modification	C:\Program Files (x86)\erSearcher\ersearcher57.exe	is-T9SD2.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	3c6cbf57a00893bf5028318965d10c63fc1846b9c5ca84a4110b734eda93548f.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	is-T9SD2.tmp
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ersearcher57.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2844	ersearcher57.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1668 wrote to memory of 376	1668	3c6cbf57a00893bf5028318965d10c63fc1846b9c5ca84a4110b734eda93548f.exe	82
PID 1668 wrote to memory of 376	1668	3c6cbf57a00893bf5028318965d10c63fc1846b9c5ca84a4110b734eda93548f.exe	82
PID 1668 wrote to memory of 376	1668	3c6cbf57a00893bf5028318965d10c63fc1846b9c5ca84a4110b734eda93548f.exe	82
PID 376 wrote to memory of 2844	376	is-T9SD2.tmp	83
PID 376 wrote to memory of 2844	376	is-T9SD2.tmp	83
PID 376 wrote to memory of 2844	376	is-T9SD2.tmp	83

C:\Users\Admin\AppData\Local\Temp\3c6cbf57a00893bf5028318965d10c63fc1846b9c5ca84a4110b734eda93548f.exe
"C:\Users\Admin\AppData\Local\Temp\3c6cbf57a00893bf5028318965d10c63fc1846b9c5ca84a4110b734eda93548f.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1668
- C:\Users\Admin\AppData\Local\Temp\is-94A4U.tmp\is-T9SD2.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-94A4U.tmp\is-T9SD2.tmp" /SL4 $602B6 "C:\Users\Admin\AppData\Local\Temp\3c6cbf57a00893bf5028318965d10c63fc1846b9c5ca84a4110b734eda93548f.exe" 2309797 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:376
- - C:\Program Files (x86)\erSearcher\ersearcher57.exe
    "C:\Program Files (x86)\erSearcher\ersearcher57.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: GetForegroundWindowSpam
    PID:2844

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)\erSearcher\ersearcher57.exe

Filesize
3.9MB

MD5
0b35829ba2326bca8125a24eedeae636

SHA1
2ac5b9e260f6ffdc47f8cb513d68c3ca4c7a626c

SHA256
8e655fc36c38cbe8baf44976f52323d6c353c5d760300269d4d2c800b24b89fd

SHA512
b86b13a35318d8238ab3ec5e279645438630a4813f69e4ed4ff457bed14cf072e8d982cbf1a720de7074b4f47d9dd02908c715a174dc1877254e5ca148c3a88e

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-94A4U.tmp\is-T9SD2.tmp

Filesize
657KB

MD5
7cd12c54a9751ca6eee6ab0c85fb68f5

SHA1
76562e9b7888b6d20d67addb5a90b68b54a51987

SHA256
e82cabb027db8846c3430be760f137afa164c36f9e1b93a6e34c96de0b2c5a5f

SHA512
27ba5d2f719aaac2ead6fb42f23af3aa866f75026be897cd2f561f3e383904e89e6043bd22b4ae24f69787bd258a68ff696c09c03d656cbf7c79c2a52d8d82cc

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

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
memory/376-12-0x0000000000400000-0x00000000004B3000-memory.dmp

Filesize
716KB

Download
memory/376-44-0x0000000000400000-0x00000000004B3000-memory.dmp

Filesize
716KB

Download
memory/1668-0-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1668-2-0x0000000000401000-0x000000000040B000-memory.dmp

Filesize
40KB

Download
memory/1668-43-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2844-41-0x0000000000400000-0x00000000015F3000-memory.dmp

Filesize
17.9MB

Download
memory/2844-40-0x0000000000400000-0x00000000015F3000-memory.dmp

Filesize
17.9MB

Download
memory/2844-42-0x0000000000400000-0x00000000015F3000-memory.dmp

Filesize
17.9MB

Download
memory/2844-45-0x0000000000400000-0x00000000015F3000-memory.dmp

Filesize
17.9MB

Download

Analysis

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