gcleaner | bb59713d6dbe3e5f28870e0bdcc9b49d0002ca398b37487735b2f1758553fea2

General

Target

bb59713d6dbe3e5f28870e0bdcc9b49d0002ca398b37487735b2f1758553fea2.exe
Size

439KB
MD5

c8be510dfe2d9af32045b559496e4042
SHA1

b4c76babf91db8a6e19b7c3dec52da439c67b8a8
SHA256

bb59713d6dbe3e5f28870e0bdcc9b49d0002ca398b37487735b2f1758553fea2
SHA512

c3492fddd3b8ccf1530b8b23cda896c73099e157401675a8b2b76c55aaaa8e854f654904ec06f0fbd1ffb5b552691a8ddc11de6551e21d2703264377ff9247ce
SSDEEP

3072:UJtpmuVmHcWw0dfLROn/BdKxbk4Pe+7tpmcivOTGsFOp1W7rZ2meLAgtol5OjjKc:ItRVmHcWHdf0KVHiv+OpsYvZoOK+l8O

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
2052	cmd.exe

Loads dropped DLL 1 IoCs

pid	Process
1876	bb59713d6dbe3e5f28870e0bdcc9b49d0002ca398b37487735b2f1758553fea2.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	bb59713d6dbe3e5f28870e0bdcc9b49d0002ca398b37487735b2f1758553fea2.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Kills process with taskkill 1 IoCs

evasion

pid	Process
2236	taskkill.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2236	taskkill.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1876 wrote to memory of 2052	1876	bb59713d6dbe3e5f28870e0bdcc9b49d0002ca398b37487735b2f1758553fea2.exe	32
PID 1876 wrote to memory of 2052	1876	bb59713d6dbe3e5f28870e0bdcc9b49d0002ca398b37487735b2f1758553fea2.exe	32
PID 1876 wrote to memory of 2052	1876	bb59713d6dbe3e5f28870e0bdcc9b49d0002ca398b37487735b2f1758553fea2.exe	32
PID 1876 wrote to memory of 2052	1876	bb59713d6dbe3e5f28870e0bdcc9b49d0002ca398b37487735b2f1758553fea2.exe	32
PID 2052 wrote to memory of 2236	2052	cmd.exe	34
PID 2052 wrote to memory of 2236	2052	cmd.exe	34
PID 2052 wrote to memory of 2236	2052	cmd.exe	34
PID 2052 wrote to memory of 2236	2052	cmd.exe	34

C:\Users\Admin\AppData\Local\Temp\bb59713d6dbe3e5f28870e0bdcc9b49d0002ca398b37487735b2f1758553fea2.exe
"C:\Users\Admin\AppData\Local\Temp\bb59713d6dbe3e5f28870e0bdcc9b49d0002ca398b37487735b2f1758553fea2.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1876
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c taskkill /im "bb59713d6dbe3e5f28870e0bdcc9b49d0002ca398b37487735b2f1758553fea2.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\bb59713d6dbe3e5f28870e0bdcc9b49d0002ca398b37487735b2f1758553fea2.exe" & exit
  2⤵
  - Deletes itself
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2052
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "bb59713d6dbe3e5f28870e0bdcc9b49d0002ca398b37487735b2f1758553fea2.exe" /f
    3⤵
    - System Location Discovery: System Language Discovery
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:2236

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\WUBCGJ0A\download[1].htm

Filesize
1B

MD5
cfcd208495d565ef66e7dff9f98764da

SHA1
b6589fc6ab0dc82cf12099d1c2d40ab994e8410c

SHA256
5feceb66ffc86f38d952786c6d696c79c2dbc239dd4e91b46729d73a27fb57e9

SHA512
31bca02094eb78126a517b206a88c73cfa9ec6f704c7030d18212cace820f025f00bf0ea68dbf3f3a5436ca63b53bf7bf80ad8d5de7d8359d0b7fed9dbc3ab99

Download Submit
\Users\Admin\AppData\Local\Temp\GCrXQIZx00U2X6r7Yxserwe3JIH29\Y-Cleaner.exe

Filesize
1.4MB

MD5
a8cf5621811f7fac55cfe8cb3fa6b9f6

SHA1
121356839e8138a03141f5f5856936a85bd2a474

SHA256
614a0362ab87cee48d0935b5bb957d539be1d94c6fdeb3fe42fac4fbe182c10c

SHA512
4479d951435f222ca7306774002f030972c9f1715d6aaf512fca9420dd79cb6d08240f80129f213851773290254be34f0ff63c7b1f4d554a7db5f84b69e84bdd

Download Submit
memory/1876-7-0x00000000028D0000-0x00000000029D0000-memory.dmp

Filesize
1024KB

Download
memory/1876-1-0x00000000028D0000-0x00000000029D0000-memory.dmp

Filesize
1024KB

Download
memory/1876-9-0x0000000010000000-0x000000001001C000-memory.dmp

Filesize
112KB

Download
memory/1876-13-0x0000000000400000-0x000000000043F000-memory.dmp

Filesize
252KB

Download
memory/1876-14-0x0000000000400000-0x0000000002487000-memory.dmp

Filesize
32.5MB

Download
memory/1876-3-0x0000000000400000-0x0000000002487000-memory.dmp

Filesize
32.5MB

Download
memory/1876-29-0x0000000000400000-0x0000000002487000-memory.dmp

Filesize
32.5MB

Download
memory/1876-2-0x0000000000400000-0x000000000043F000-memory.dmp

Filesize
252KB

Download
memory/1876-48-0x00000000028D0000-0x00000000029D0000-memory.dmp

Filesize
1024KB

Download
memory/1876-47-0x0000000000400000-0x000000000043F000-memory.dmp

Filesize
252KB

Download
memory/1876-46-0x0000000000400000-0x0000000002487000-memory.dmp

Filesize
32.5MB

Download

Analysis

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