gcleaner | 088521c9919c796fda14c3fe63e2e591d3bd3ef15832dd061a9bdea0807027af

General

Target

088521c9919c796fda14c3fe63e2e591d3bd3ef15832dd061a9bdea0807027afN.exe
Size

1.2MB
MD5

633eb4457a0fbb406c3ff46b144659e0
SHA1

d476daae5bafedfecd974c2178811c5bccd42a63
SHA256

088521c9919c796fda14c3fe63e2e591d3bd3ef15832dd061a9bdea0807027af
SHA512

c98985ba97936e6d07e5f442d889089b12a2b018db6719e2b0417a3431f2fbb7763ef2085e8e2b1d3433498391e62d4a70141123505c139c43f43664ce7e69c0
SSDEEP

24576:a2exnN84v8TAGe4steUTnVjS/hg0Lw/LdQINtTWRUo6x/UEHM6a723:a2WcT/eb/TnVm/h/wdtTWRU9st23

Score

10^/10

gcleaner discovery loader

Malware Config

Extracted

Family

gcleaner

C2

85.208.136.148

85.208.136.56

85.208.136.48

85.208.136.87

Attributes

url_path
/x.php

/soft.php

/soft.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
2696	is-N3S4V.tmp
2704	pgm81.exe

Loads dropped DLL 5 IoCs

pid	Process
1848	088521c9919c796fda14c3fe63e2e591d3bd3ef15832dd061a9bdea0807027afN.exe
2696	is-N3S4V.tmp
2696	is-N3S4V.tmp
2696	is-N3S4V.tmp
2696	is-N3S4V.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 7 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\PGM Disk Master\is-AEIJK.tmp	is-N3S4V.tmp
File created	C:\Program Files (x86)\PGM Disk Master\is-OCPR3.tmp	is-N3S4V.tmp
File created	C:\Program Files (x86)\PGM Disk Master\is-LCLCN.tmp	is-N3S4V.tmp
File created	C:\Program Files (x86)\PGM Disk Master\is-2BS21.tmp	is-N3S4V.tmp
File opened for modification	C:\Program Files (x86)\PGM Disk Master\unins000.dat	is-N3S4V.tmp
File opened for modification	C:\Program Files (x86)\PGM Disk Master\pgm81.exe	is-N3S4V.tmp
File created	C:\Program Files (x86)\PGM Disk Master\unins000.dat	is-N3S4V.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	088521c9919c796fda14c3fe63e2e591d3bd3ef15832dd061a9bdea0807027afN.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	is-N3S4V.tmp
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	pgm81.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2704	pgm81.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 1848 wrote to memory of 2696	1848	088521c9919c796fda14c3fe63e2e591d3bd3ef15832dd061a9bdea0807027afN.exe	30
PID 1848 wrote to memory of 2696	1848	088521c9919c796fda14c3fe63e2e591d3bd3ef15832dd061a9bdea0807027afN.exe	30
PID 1848 wrote to memory of 2696	1848	088521c9919c796fda14c3fe63e2e591d3bd3ef15832dd061a9bdea0807027afN.exe	30
PID 1848 wrote to memory of 2696	1848	088521c9919c796fda14c3fe63e2e591d3bd3ef15832dd061a9bdea0807027afN.exe	30
PID 1848 wrote to memory of 2696	1848	088521c9919c796fda14c3fe63e2e591d3bd3ef15832dd061a9bdea0807027afN.exe	30
PID 1848 wrote to memory of 2696	1848	088521c9919c796fda14c3fe63e2e591d3bd3ef15832dd061a9bdea0807027afN.exe	30
PID 1848 wrote to memory of 2696	1848	088521c9919c796fda14c3fe63e2e591d3bd3ef15832dd061a9bdea0807027afN.exe	30
PID 2696 wrote to memory of 2704	2696	is-N3S4V.tmp	31
PID 2696 wrote to memory of 2704	2696	is-N3S4V.tmp	31
PID 2696 wrote to memory of 2704	2696	is-N3S4V.tmp	31
PID 2696 wrote to memory of 2704	2696	is-N3S4V.tmp	31

C:\Users\Admin\AppData\Local\Temp\088521c9919c796fda14c3fe63e2e591d3bd3ef15832dd061a9bdea0807027afN.exe
"C:\Users\Admin\AppData\Local\Temp\088521c9919c796fda14c3fe63e2e591d3bd3ef15832dd061a9bdea0807027afN.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1848
- C:\Users\Admin\AppData\Local\Temp\is-9N0Q2.tmp\is-N3S4V.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-9N0Q2.tmp\is-N3S4V.tmp" /SL4 $4010C "C:\Users\Admin\AppData\Local\Temp\088521c9919c796fda14c3fe63e2e591d3bd3ef15832dd061a9bdea0807027afN.exe" 1049255 75264
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2696
- - C:\Program Files (x86)\PGM Disk Master\pgm81.exe
    "C:\Program Files (x86)\PGM Disk Master\pgm81.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: GetForegroundWindowSpam
    PID:2704

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)\PGM Disk Master\pgm81.exe

Filesize
1.6MB

MD5
8d01aed3221f0b3b7ff77df48c4c1c3f

SHA1
f5e9516c63942f910c764e146b7945accd6fd63d

SHA256
d8767fa1ea01f93ec3aedf73ec1f3bd97c7e0d039a9dd656a78731ed2774c3ab

SHA512
44bf01b9b39bb60dd0b153ad6b4194da5f38179662fbd2e322f745475fa2d4f6205aee7f993c098f764361491f1f6276732f6a7efef299cfae54727a17e058ae

Download Submit
\Users\Admin\AppData\Local\Temp\is-9N0Q2.tmp\is-N3S4V.tmp

Filesize
679KB

MD5
505b95543234ddc4ea7ab8c5985c18b9

SHA1
48f4462b0f83d1b76bba97ffdfe0e751e7c88f1e

SHA256
a9ea02770c0e21b72d8dc996f76c8b17669f9a4cad6cd6a63b5120ad7d14110b

SHA512
df655b9882fbff0396faf7a3804bd7418fffc1f62abf7ad7b59469ce52d8b832b15fed7adc0746d1fce8ff2a5fe5628ee9e2269ef1fcd39d05258d627ff16de4

Download Submit
\Users\Admin\AppData\Local\Temp\is-M5CL6.tmp\_isetup\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
\Users\Admin\AppData\Local\Temp\is-M5CL6.tmp\_isetup\_shfoldr.dll

Filesize
22KB

MD5
92dc6ef532fbb4a5c3201469a5b5eb63

SHA1
3e89ff837147c16b4e41c30d6c796374e0b8e62c

SHA256
9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

SHA512
9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

Download Submit
memory/1848-0-0x0000000000400000-0x0000000000419000-memory.dmp

Filesize
100KB

Download
memory/1848-3-0x0000000000401000-0x000000000040B000-memory.dmp

Filesize
40KB

Download
memory/1848-39-0x0000000000400000-0x0000000000419000-memory.dmp

Filesize
100KB

Download
memory/2696-12-0x0000000000400000-0x00000000004B9000-memory.dmp

Filesize
740KB

Download
memory/2696-34-0x0000000003A20000-0x00000000049AD000-memory.dmp

Filesize
15.6MB

Download
memory/2696-37-0x0000000000400000-0x00000000004B9000-memory.dmp

Filesize
740KB

Download
memory/2696-38-0x0000000003A20000-0x00000000049AD000-memory.dmp

Filesize
15.6MB

Download
memory/2704-35-0x0000000000400000-0x000000000138D000-memory.dmp

Filesize
15.6MB

Download
memory/2704-36-0x0000000000400000-0x000000000138D000-memory.dmp

Filesize
15.6MB

Download
memory/2704-42-0x0000000000400000-0x000000000138D000-memory.dmp

Filesize
15.6MB

Download

Analysis

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