gcleaner | 126c47a436b70e43e6515330dc1b44f974570d6738f3ed63481df6d6d1fc79a6

General

Target

126c47a436b70e43e6515330dc1b44f974570d6738f3ed63481df6d6d1fc79a6.exe
Size

404KB
MD5

bb2669090265bbfe8f00eca665913e06
SHA1

b77ff15f3c6690cd0afcf66f188a5b2e491a5606
SHA256

126c47a436b70e43e6515330dc1b44f974570d6738f3ed63481df6d6d1fc79a6
SHA512

f598eef8ef44f70f28e020a5d5c965ee4ddf8cf548d483a8b5dbea28227f153b9bca504cd20bf855e6b61f81219a7fd9d0ae87675e0687c47d5eebd3dbf6a523
SSDEEP

6144:y3KjsVdUbbzx1a3npEEGcgWTAu7YLWvfy4oq:y30sVGPzxcX3lT37YLUy5

Score

10^/10

gcleaner discovery loader

Malware Config

Extracted

Family

gcleaner

C2

80.66.75.114

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
1940	cmd.exe

Loads dropped DLL 1 IoCs

pid	Process
1664	126c47a436b70e43e6515330dc1b44f974570d6738f3ed63481df6d6d1fc79a6.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	taskkill.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	126c47a436b70e43e6515330dc1b44f974570d6738f3ed63481df6d6d1fc79a6.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Kills process with taskkill 1 IoCs

evasion

pid	Process
2640	taskkill.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2640	taskkill.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1664 wrote to memory of 1940	1664	126c47a436b70e43e6515330dc1b44f974570d6738f3ed63481df6d6d1fc79a6.exe	32
PID 1664 wrote to memory of 1940	1664	126c47a436b70e43e6515330dc1b44f974570d6738f3ed63481df6d6d1fc79a6.exe	32
PID 1664 wrote to memory of 1940	1664	126c47a436b70e43e6515330dc1b44f974570d6738f3ed63481df6d6d1fc79a6.exe	32
PID 1664 wrote to memory of 1940	1664	126c47a436b70e43e6515330dc1b44f974570d6738f3ed63481df6d6d1fc79a6.exe	32
PID 1940 wrote to memory of 2640	1940	cmd.exe	34
PID 1940 wrote to memory of 2640	1940	cmd.exe	34
PID 1940 wrote to memory of 2640	1940	cmd.exe	34
PID 1940 wrote to memory of 2640	1940	cmd.exe	34

C:\Users\Admin\AppData\Local\Temp\126c47a436b70e43e6515330dc1b44f974570d6738f3ed63481df6d6d1fc79a6.exe
"C:\Users\Admin\AppData\Local\Temp\126c47a436b70e43e6515330dc1b44f974570d6738f3ed63481df6d6d1fc79a6.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1664
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c taskkill /im "126c47a436b70e43e6515330dc1b44f974570d6738f3ed63481df6d6d1fc79a6.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\126c47a436b70e43e6515330dc1b44f974570d6738f3ed63481df6d6d1fc79a6.exe" & exit
  2⤵
  - Deletes itself
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1940
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "126c47a436b70e43e6515330dc1b44f974570d6738f3ed63481df6d6d1fc79a6.exe" /f
    3⤵
    - System Location Discovery: System Language Discovery
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:2640

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\HTBGGANG\download[1].htm

Filesize
1B

MD5
cfcd208495d565ef66e7dff9f98764da

SHA1
b6589fc6ab0dc82cf12099d1c2d40ab994e8410c

SHA256
5feceb66ffc86f38d952786c6d696c79c2dbc239dd4e91b46729d73a27fb57e9

SHA512
31bca02094eb78126a517b206a88c73cfa9ec6f704c7030d18212cace820f025f00bf0ea68dbf3f3a5436ca63b53bf7bf80ad8d5de7d8359d0b7fed9dbc3ab99

Download Submit
\Users\Admin\AppData\Local\Temp\UBW4uCwfSHf5H7ZLZ9\Y-Cleaner.exe

Filesize
1.4MB

MD5
a8cf5621811f7fac55cfe8cb3fa6b9f6

SHA1
121356839e8138a03141f5f5856936a85bd2a474

SHA256
614a0362ab87cee48d0935b5bb957d539be1d94c6fdeb3fe42fac4fbe182c10c

SHA512
4479d951435f222ca7306774002f030972c9f1715d6aaf512fca9420dd79cb6d08240f80129f213851773290254be34f0ff63c7b1f4d554a7db5f84b69e84bdd

Download Submit
memory/1664-17-0x0000000000400000-0x000000000043F000-memory.dmp

Filesize
252KB

Download
memory/1664-8-0x0000000010000000-0x000000001001C000-memory.dmp

Filesize
112KB

Download
memory/1664-12-0x0000000000700000-0x0000000000800000-memory.dmp

Filesize
1024KB

Download
memory/1664-14-0x0000000000230000-0x000000000026C000-memory.dmp

Filesize
240KB

Download
memory/1664-1-0x0000000000700000-0x0000000000800000-memory.dmp

Filesize
1024KB

Download
memory/1664-16-0x0000000000400000-0x00000000005F7000-memory.dmp

Filesize
2.0MB

Download
memory/1664-3-0x0000000000400000-0x000000000043F000-memory.dmp

Filesize
252KB

Download
memory/1664-29-0x0000000000400000-0x00000000005F7000-memory.dmp

Filesize
2.0MB

Download
memory/1664-2-0x0000000000230000-0x000000000026C000-memory.dmp

Filesize
240KB

Download
memory/1664-38-0x0000000000400000-0x000000000043F000-memory.dmp

Filesize
252KB

Download
memory/1664-37-0x0000000000700000-0x0000000000800000-memory.dmp

Filesize
1024KB

Download
memory/1664-36-0x0000000000400000-0x00000000005F7000-memory.dmp

Filesize
2.0MB

Download

Analysis

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