gcleaner | 5b2b098fbc0d3c1a4173909e67e24ff7b7bc6855a5350322bd9b8e1887d773f7

General

Target

5b2b098fbc0d3c1a4173909e67e24ff7b7bc6855a5350322bd9b8e1887d773f7.exe
Size

315KB
MD5

f78aa5352c1ddaaca5a61b71e12cc820
SHA1

fe1c47aafec8a6be375ffe7570888519cf26e847
SHA256

5b2b098fbc0d3c1a4173909e67e24ff7b7bc6855a5350322bd9b8e1887d773f7
SHA512

d652e2c030a7d9dbd0b384526054f0508d31b2d3b7edc21cf364e93a7c251def4dd75aa371070365eb6e113ea3c7ad35de129952972f2544f70614d1bb38ad54
SSDEEP

6144:kEbAXzyZB2+jJjdgoXcK0HmS5vz4uQTdJXZ:/bWzyZB22B/Qvz4hdJXZ

Score

10^/10

gcleaner discovery loader

Malware Config

Extracted

Family

gcleaner

C2

80.66.75.114

45.91.200.135

Signatures

GCleaner
GCleaner is a Pay-Per-Install malware loader first discovered in early 2019.
loader gcleaner
Downloads MZ/PE file

Deletes itself 1 IoCs

pid	Process
2388	cmd.exe

Loads dropped DLL 1 IoCs

pid	Process
2652	5b2b098fbc0d3c1a4173909e67e24ff7b7bc6855a5350322bd9b8e1887d773f7.exe

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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	taskkill.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	5b2b098fbc0d3c1a4173909e67e24ff7b7bc6855a5350322bd9b8e1887d773f7.exe

Kills process with taskkill 1 IoCs

evasion

pid	Process
2368	taskkill.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2652	5b2b098fbc0d3c1a4173909e67e24ff7b7bc6855a5350322bd9b8e1887d773f7.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2368	taskkill.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2652 wrote to memory of 2388	2652	5b2b098fbc0d3c1a4173909e67e24ff7b7bc6855a5350322bd9b8e1887d773f7.exe	32
PID 2652 wrote to memory of 2388	2652	5b2b098fbc0d3c1a4173909e67e24ff7b7bc6855a5350322bd9b8e1887d773f7.exe	32
PID 2652 wrote to memory of 2388	2652	5b2b098fbc0d3c1a4173909e67e24ff7b7bc6855a5350322bd9b8e1887d773f7.exe	32
PID 2652 wrote to memory of 2388	2652	5b2b098fbc0d3c1a4173909e67e24ff7b7bc6855a5350322bd9b8e1887d773f7.exe	32
PID 2388 wrote to memory of 2368	2388	cmd.exe	34
PID 2388 wrote to memory of 2368	2388	cmd.exe	34
PID 2388 wrote to memory of 2368	2388	cmd.exe	34
PID 2388 wrote to memory of 2368	2388	cmd.exe	34

C:\Users\Admin\AppData\Local\Temp\5b2b098fbc0d3c1a4173909e67e24ff7b7bc6855a5350322bd9b8e1887d773f7.exe
"C:\Users\Admin\AppData\Local\Temp\5b2b098fbc0d3c1a4173909e67e24ff7b7bc6855a5350322bd9b8e1887d773f7.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
PID:2652
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c taskkill /im "5b2b098fbc0d3c1a4173909e67e24ff7b7bc6855a5350322bd9b8e1887d773f7.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\5b2b098fbc0d3c1a4173909e67e24ff7b7bc6855a5350322bd9b8e1887d773f7.exe" & exit
  2⤵
  - Deletes itself
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2388
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "5b2b098fbc0d3c1a4173909e67e24ff7b7bc6855a5350322bd9b8e1887d773f7.exe" /f
    3⤵
    - System Location Discovery: System Language Discovery
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:2368

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

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

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\0I0VVMWQ\download[1].htm

Filesize
1B

MD5
cfcd208495d565ef66e7dff9f98764da

SHA1
b6589fc6ab0dc82cf12099d1c2d40ab994e8410c

SHA256
5feceb66ffc86f38d952786c6d696c79c2dbc239dd4e91b46729d73a27fb57e9

SHA512
31bca02094eb78126a517b206a88c73cfa9ec6f704c7030d18212cace820f025f00bf0ea68dbf3f3a5436ca63b53bf7bf80ad8d5de7d8359d0b7fed9dbc3ab99

Download Submit
\Users\Admin\AppData\Local\Temp\LWqPLE1wzHwF1TWyTA\Y-Cleaner.exe

Filesize
1.4MB

MD5
a8cf5621811f7fac55cfe8cb3fa6b9f6

SHA1
121356839e8138a03141f5f5856936a85bd2a474

SHA256
614a0362ab87cee48d0935b5bb957d539be1d94c6fdeb3fe42fac4fbe182c10c

SHA512
4479d951435f222ca7306774002f030972c9f1715d6aaf512fca9420dd79cb6d08240f80129f213851773290254be34f0ff63c7b1f4d554a7db5f84b69e84bdd

Download Submit
memory/2652-15-0x0000000000400000-0x000000000043F000-memory.dmp

Filesize
252KB

Download
memory/2652-8-0x0000000010000000-0x000000001001C000-memory.dmp

Filesize
112KB

Download
memory/2652-12-0x0000000002C00000-0x0000000002D00000-memory.dmp

Filesize
1024KB

Download
memory/2652-13-0x00000000002C0000-0x00000000002FB000-memory.dmp

Filesize
236KB

Download
memory/2652-1-0x0000000002C00000-0x0000000002D00000-memory.dmp

Filesize
1024KB

Download
memory/2652-14-0x0000000000400000-0x0000000002B6F000-memory.dmp

Filesize
39.4MB

Download
memory/2652-3-0x0000000000400000-0x000000000043F000-memory.dmp

Filesize
252KB

Download
memory/2652-29-0x0000000000400000-0x0000000002B6F000-memory.dmp

Filesize
39.4MB

Download
memory/2652-32-0x0000000000400000-0x0000000002B6F000-memory.dmp

Filesize
39.4MB

Download
memory/2652-2-0x00000000002C0000-0x00000000002FB000-memory.dmp

Filesize
236KB

Download
memory/2652-48-0x0000000000400000-0x000000000043F000-memory.dmp

Filesize
252KB

Download
memory/2652-47-0x0000000002C00000-0x0000000002D00000-memory.dmp

Filesize
1024KB

Download
memory/2652-46-0x0000000000400000-0x0000000002B6F000-memory.dmp

Filesize
39.4MB

Download

Analysis

Sharing