gcleaner | dee7ef4c7f75ae59bdf4c8f7b393a5bd9a060bbc05659eeaf991b704f7b2f39f

General

Target

1c9523e4ca9221b424a44feb028834a2829e302e7fbc89b9aff8a4b63a7e34fd.exe
Size

2.3MB
MD5

7e50c3b5dc06bc592f7acd4b8c03ad3c
SHA1

6a30c38880bd30358484bc1741d67a8a815f2322
SHA256

1c9523e4ca9221b424a44feb028834a2829e302e7fbc89b9aff8a4b63a7e34fd
SHA512

50a866d1f7d47e4462ef3963c0b2e79e66b4ced753d32a5d96d44fa7c38a2bdd3b04fd0af8db33bbcbed884388e14cd91024c2555388f971e75d435d3a5410c2
SSDEEP

49152:Z25fD8F3tybYnBRkIt8xex/BM2L3YP7S6ZvdVd/FBvLOqcyNA5hq:MhDA3fBRIsBM2ra7r/d/bWDq

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
1828	is-DQ428.tmp
2404	ersearcher57.exe

Loads dropped DLL 1 IoCs

pid	Process
1828	is-DQ428.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-MBBU8.tmp	is-DQ428.tmp
File opened for modification	C:\Program Files (x86)\erSearcher\ersearcher57.exe	is-DQ428.tmp
File created	C:\Program Files (x86)\erSearcher\is-IB1NR.tmp	is-DQ428.tmp
File created	C:\Program Files (x86)\erSearcher\is-4O83N.tmp	is-DQ428.tmp
File created	C:\Program Files (x86)\erSearcher\is-PQPP9.tmp	is-DQ428.tmp
File created	C:\Program Files (x86)\erSearcher\is-9UU9N.tmp	is-DQ428.tmp
File created	C:\Program Files (x86)\erSearcher\is-GCJ8A.tmp	is-DQ428.tmp
File created	C:\Program Files (x86)\erSearcher\is-RA03O.tmp	is-DQ428.tmp
File opened for modification	C:\Program Files (x86)\erSearcher\unins000.dat	is-DQ428.tmp
File created	C:\Program Files (x86)\erSearcher\unins000.dat	is-DQ428.tmp
File created	C:\Program Files (x86)\erSearcher\is-IHM6T.tmp	is-DQ428.tmp
File created	C:\Program Files (x86)\erSearcher\is-MTAU5.tmp	is-DQ428.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	ersearcher57.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	1c9523e4ca9221b424a44feb028834a2829e302e7fbc89b9aff8a4b63a7e34fd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	is-DQ428.tmp

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2404	ersearcher57.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 364 wrote to memory of 1828	364	1c9523e4ca9221b424a44feb028834a2829e302e7fbc89b9aff8a4b63a7e34fd.exe	83
PID 364 wrote to memory of 1828	364	1c9523e4ca9221b424a44feb028834a2829e302e7fbc89b9aff8a4b63a7e34fd.exe	83
PID 364 wrote to memory of 1828	364	1c9523e4ca9221b424a44feb028834a2829e302e7fbc89b9aff8a4b63a7e34fd.exe	83
PID 1828 wrote to memory of 2404	1828	is-DQ428.tmp	84
PID 1828 wrote to memory of 2404	1828	is-DQ428.tmp	84
PID 1828 wrote to memory of 2404	1828	is-DQ428.tmp	84

C:\Users\Admin\AppData\Local\Temp\1c9523e4ca9221b424a44feb028834a2829e302e7fbc89b9aff8a4b63a7e34fd.exe
"C:\Users\Admin\AppData\Local\Temp\1c9523e4ca9221b424a44feb028834a2829e302e7fbc89b9aff8a4b63a7e34fd.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:364
- C:\Users\Admin\AppData\Local\Temp\is-V4JE4.tmp\is-DQ428.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-V4JE4.tmp\is-DQ428.tmp" /SL4 $60284 "C:\Users\Admin\AppData\Local\Temp\1c9523e4ca9221b424a44feb028834a2829e302e7fbc89b9aff8a4b63a7e34fd.exe" 2116678 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:1828
- - 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:2404

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
3.8MB

MD5
057b1af37e54cc395ec0b4373dd6407c

SHA1
a4e3503aafc83b46f6421421a7fc03eb68ad9fa9

SHA256
11071e270e6aab34bb071b5f07e75dc32dacb66c86316a8b98c01ab8d3a4058d

SHA512
7cc1ba3d1dd89ab0b271fd5839ffbd1d694f978917ea9ff6fe36f679ed7746e39faf6cc58f8daea2f45e611013336a7d5f018f2f87fa2f72d780cee3e5330b30

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-QTFL3.tmp\_isetup\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-V4JE4.tmp\is-DQ428.tmp

Filesize
657KB

MD5
7cd12c54a9751ca6eee6ab0c85fb68f5

SHA1
76562e9b7888b6d20d67addb5a90b68b54a51987

SHA256
e82cabb027db8846c3430be760f137afa164c36f9e1b93a6e34c96de0b2c5a5f

SHA512
27ba5d2f719aaac2ead6fb42f23af3aa866f75026be897cd2f561f3e383904e89e6043bd22b4ae24f69787bd258a68ff696c09c03d656cbf7c79c2a52d8d82cc

Download Submit
memory/364-0-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/364-2-0x0000000000401000-0x000000000040B000-memory.dmp

Filesize
40KB

Download
memory/364-43-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1828-12-0x0000000000400000-0x00000000004B3000-memory.dmp

Filesize
716KB

Download
memory/1828-44-0x0000000000400000-0x00000000004B3000-memory.dmp

Filesize
716KB

Download
memory/2404-40-0x0000000000400000-0x00000000015C1000-memory.dmp

Filesize
17.8MB

Download
memory/2404-41-0x0000000000400000-0x00000000015C1000-memory.dmp

Filesize
17.8MB

Download
memory/2404-42-0x0000000000400000-0x00000000015C1000-memory.dmp

Filesize
17.8MB

Download
memory/2404-45-0x0000000000400000-0x00000000015C1000-memory.dmp

Filesize
17.8MB

Download

Analysis

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