gcleaner | ce7b5416c09c7591e9d65fd4cec9b6ad08e23ec725f3acb007e8a8addf0341ed

General

Target

ce7b5416c09c7591e9d65fd4cec9b6ad08e23ec725f3acb007e8a8addf0341ed.exe
Size

324KB
MD5

e758217722d30aa504dca0ca929fb6b8
SHA1

ae125b76c669d03a776df574175b3aef2de14935
SHA256

ce7b5416c09c7591e9d65fd4cec9b6ad08e23ec725f3acb007e8a8addf0341ed
SHA512

29f9e327ef87d18415a2140ce9c325173575f7b934c0ba88c7bcdbd0d44348658dbd1ad91577b8d3fa33ba6f4db88e2248675385e9b5f636ed7e5f22172d2093
SSDEEP

6144:uADahWrg8roVp55fFzaLGJ0qa1ifMofts/MMtx0Vdh1tQ:uYagk8rwp55fF2LGJA13MtAQVdz

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
2520	cmd.exe

Loads dropped DLL 1 IoCs

pid	Process
1600	ce7b5416c09c7591e9d65fd4cec9b6ad08e23ec725f3acb007e8a8addf0341ed.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1568 set thread context of 1600	1568	ce7b5416c09c7591e9d65fd4cec9b6ad08e23ec725f3acb007e8a8addf0341ed.exe	29

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 4 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	taskkill.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ce7b5416c09c7591e9d65fd4cec9b6ad08e23ec725f3acb007e8a8addf0341ed.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ce7b5416c09c7591e9d65fd4cec9b6ad08e23ec725f3acb007e8a8addf0341ed.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Kills process with taskkill 1 IoCs

evasion

pid	Process
3056	taskkill.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3056	taskkill.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 1568 wrote to memory of 1600	1568	ce7b5416c09c7591e9d65fd4cec9b6ad08e23ec725f3acb007e8a8addf0341ed.exe	29
PID 1568 wrote to memory of 1600	1568	ce7b5416c09c7591e9d65fd4cec9b6ad08e23ec725f3acb007e8a8addf0341ed.exe	29
PID 1568 wrote to memory of 1600	1568	ce7b5416c09c7591e9d65fd4cec9b6ad08e23ec725f3acb007e8a8addf0341ed.exe	29
PID 1568 wrote to memory of 1600	1568	ce7b5416c09c7591e9d65fd4cec9b6ad08e23ec725f3acb007e8a8addf0341ed.exe	29
PID 1568 wrote to memory of 1600	1568	ce7b5416c09c7591e9d65fd4cec9b6ad08e23ec725f3acb007e8a8addf0341ed.exe	29
PID 1568 wrote to memory of 1600	1568	ce7b5416c09c7591e9d65fd4cec9b6ad08e23ec725f3acb007e8a8addf0341ed.exe	29
PID 1568 wrote to memory of 1600	1568	ce7b5416c09c7591e9d65fd4cec9b6ad08e23ec725f3acb007e8a8addf0341ed.exe	29
PID 1568 wrote to memory of 1600	1568	ce7b5416c09c7591e9d65fd4cec9b6ad08e23ec725f3acb007e8a8addf0341ed.exe	29
PID 1568 wrote to memory of 1600	1568	ce7b5416c09c7591e9d65fd4cec9b6ad08e23ec725f3acb007e8a8addf0341ed.exe	29
PID 1568 wrote to memory of 1600	1568	ce7b5416c09c7591e9d65fd4cec9b6ad08e23ec725f3acb007e8a8addf0341ed.exe	29
PID 1568 wrote to memory of 1600	1568	ce7b5416c09c7591e9d65fd4cec9b6ad08e23ec725f3acb007e8a8addf0341ed.exe	29
PID 1600 wrote to memory of 2520	1600	ce7b5416c09c7591e9d65fd4cec9b6ad08e23ec725f3acb007e8a8addf0341ed.exe	31
PID 1600 wrote to memory of 2520	1600	ce7b5416c09c7591e9d65fd4cec9b6ad08e23ec725f3acb007e8a8addf0341ed.exe	31
PID 1600 wrote to memory of 2520	1600	ce7b5416c09c7591e9d65fd4cec9b6ad08e23ec725f3acb007e8a8addf0341ed.exe	31
PID 1600 wrote to memory of 2520	1600	ce7b5416c09c7591e9d65fd4cec9b6ad08e23ec725f3acb007e8a8addf0341ed.exe	31
PID 2520 wrote to memory of 3056	2520	cmd.exe	33
PID 2520 wrote to memory of 3056	2520	cmd.exe	33
PID 2520 wrote to memory of 3056	2520	cmd.exe	33
PID 2520 wrote to memory of 3056	2520	cmd.exe	33

C:\Users\Admin\AppData\Local\Temp\ce7b5416c09c7591e9d65fd4cec9b6ad08e23ec725f3acb007e8a8addf0341ed.exe
"C:\Users\Admin\AppData\Local\Temp\ce7b5416c09c7591e9d65fd4cec9b6ad08e23ec725f3acb007e8a8addf0341ed.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1568
- C:\Users\Admin\AppData\Local\Temp\ce7b5416c09c7591e9d65fd4cec9b6ad08e23ec725f3acb007e8a8addf0341ed.exe
  "C:\Users\Admin\AppData\Local\Temp\ce7b5416c09c7591e9d65fd4cec9b6ad08e23ec725f3acb007e8a8addf0341ed.exe"
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1600
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c taskkill /im "ce7b5416c09c7591e9d65fd4cec9b6ad08e23ec725f3acb007e8a8addf0341ed.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\ce7b5416c09c7591e9d65fd4cec9b6ad08e23ec725f3acb007e8a8addf0341ed.exe" & exit
    3⤵
    - Deletes itself
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2520
  - - C:\Windows\SysWOW64\taskkill.exe
      taskkill /im "ce7b5416c09c7591e9d65fd4cec9b6ad08e23ec725f3acb007e8a8addf0341ed.exe" /f
      4⤵
      System Location Discovery: System Language Discovery
      Kills process with taskkill
      Suspicious use of AdjustPrivilegeToken
      PID:3056

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

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Downloads

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

Filesize
1B

MD5
cfcd208495d565ef66e7dff9f98764da

SHA1
b6589fc6ab0dc82cf12099d1c2d40ab994e8410c

SHA256
5feceb66ffc86f38d952786c6d696c79c2dbc239dd4e91b46729d73a27fb57e9

SHA512
31bca02094eb78126a517b206a88c73cfa9ec6f704c7030d18212cace820f025f00bf0ea68dbf3f3a5436ca63b53bf7bf80ad8d5de7d8359d0b7fed9dbc3ab99

Download Submit
\Users\Admin\AppData\Local\Temp\ZSKLeD6IH\Y-Cleaner.exe

Filesize
1.4MB

MD5
a8cf5621811f7fac55cfe8cb3fa6b9f6

SHA1
121356839e8138a03141f5f5856936a85bd2a474

SHA256
614a0362ab87cee48d0935b5bb957d539be1d94c6fdeb3fe42fac4fbe182c10c

SHA512
4479d951435f222ca7306774002f030972c9f1715d6aaf512fca9420dd79cb6d08240f80129f213851773290254be34f0ff63c7b1f4d554a7db5f84b69e84bdd

Download Submit
memory/1568-5-0x00000000002D0000-0x00000000003D0000-memory.dmp

Filesize
1024KB

Download
memory/1568-4-0x00000000001B0000-0x00000000001EB000-memory.dmp

Filesize
236KB

Download
memory/1600-1-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/1600-7-0x0000000000400000-0x000000000043F000-memory.dmp

Filesize
252KB

Download
memory/1600-3-0x0000000000400000-0x000000000043F000-memory.dmp

Filesize
252KB

Download
memory/1600-14-0x0000000010000000-0x000000001001C000-memory.dmp

Filesize
112KB

Download
memory/1600-8-0x0000000000400000-0x000000000043F000-memory.dmp

Filesize
252KB

Download
memory/1600-21-0x0000000000400000-0x000000000043F000-memory.dmp

Filesize
252KB

Download
memory/1600-30-0x0000000000400000-0x000000000043F000-memory.dmp

Filesize
252KB

Download
memory/1600-33-0x0000000000400000-0x000000000043F000-memory.dmp

Filesize
252KB

Download
memory/1600-9-0x0000000000400000-0x000000000043F000-memory.dmp

Filesize
252KB

Download
memory/1600-45-0x0000000000400000-0x000000000043F000-memory.dmp

Filesize
252KB

Download

Analysis

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