gcleaner | 05523b484c9fcefdb45a393c07cc203de6f4028fc3805f4fde0c632ade9b17c0

General

Target

file.exe
Size

1.5MB
MD5

6326cf82691866f30d00e3dba752fe52
SHA1

dbcb966707d96356f6db235dea04acb012b5fc14
SHA256

05523b484c9fcefdb45a393c07cc203de6f4028fc3805f4fde0c632ade9b17c0
SHA512

ffee8efd1aa210b41d6aef7e1c007f2771a12163512bf2a6e86580e60100c06cebe43d747d64c6c362f2812a98cf8f6358429664bd469e89561275cfc092cc76
SSDEEP

24576:r20h5D4ji2Vundw46aeDL6kXT7L+40PfbGXA97A+nshwCbr:r2wNLoaIL6kXL+dbXs6Cbr

Score

10^/10

gcleaner discovery loader

Malware Config

Extracted

Family

gcleaner

C2

45.139.105.171

85.31.46.167

107.182.129.235

171.22.30.106

Signatures

GCleaner
GCleaner is a Pay-Per-Install malware loader first discovered in early 2019.
loader gcleaner

Executes dropped EXE 3 IoCs

pid	Process
4416	file.tmp
4944	OitFiles450.exe
4876	BPqXAAX5x1HlJ.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	OitFiles450.exe

Loads dropped DLL 1 IoCs

pid	Process
4416	file.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 17 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\Oit Files\unins000.dat	file.tmp
File created	C:\Program Files (x86)\Oit Files\language\is-2LITI.tmp	file.tmp
File opened for modification	C:\Program Files (x86)\Oit Files\unins000.dat	file.tmp
File opened for modification	C:\Program Files (x86)\Oit Files\OitFiles450.exe	file.tmp
File created	C:\Program Files (x86)\Oit Files\language\is-5GNTO.tmp	file.tmp
File created	C:\Program Files (x86)\Oit Files\is-T11CH.tmp	file.tmp
File created	C:\Program Files (x86)\Oit Files\is-FFHOL.tmp	file.tmp
File created	C:\Program Files (x86)\Oit Files\is-6D3CG.tmp	file.tmp
File created	C:\Program Files (x86)\Oit Files\language\is-CQ2I3.tmp	file.tmp
File created	C:\Program Files (x86)\Oit Files\language\is-G6M8V.tmp	file.tmp
File created	C:\Program Files (x86)\Oit Files\language\is-6PCFQ.tmp	file.tmp
File created	C:\Program Files (x86)\Oit Files\language\is-BU837.tmp	file.tmp
File created	C:\Program Files (x86)\Oit Files\is-UV3H5.tmp	file.tmp
File created	C:\Program Files (x86)\Oit Files\is-BFL3C.tmp	file.tmp
File created	C:\Program Files (x86)\Oit Files\language\is-GG4TJ.tmp	file.tmp
File created	C:\Program Files (x86)\Oit Files\language\is-TAQVM.tmp	file.tmp
File created	C:\Program Files (x86)\Oit Files\language\is-JSF1A.tmp	file.tmp

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Kills process with taskkill 1 IoCs

evasion

pid	Process
4500	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4944	OitFiles450.exe
4944	OitFiles450.exe
4944	OitFiles450.exe
4944	OitFiles450.exe
4944	OitFiles450.exe
4944	OitFiles450.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4500	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4528 wrote to memory of 4416	4528	file.exe	81
PID 4528 wrote to memory of 4416	4528	file.exe	81
PID 4528 wrote to memory of 4416	4528	file.exe	81
PID 4416 wrote to memory of 4944	4416	file.tmp	82
PID 4416 wrote to memory of 4944	4416	file.tmp	82
PID 4416 wrote to memory of 4944	4416	file.tmp	82
PID 4944 wrote to memory of 4876	4944	OitFiles450.exe	83
PID 4944 wrote to memory of 4876	4944	OitFiles450.exe	83
PID 4944 wrote to memory of 4876	4944	OitFiles450.exe	83
PID 4944 wrote to memory of 1432	4944	OitFiles450.exe	85
PID 4944 wrote to memory of 1432	4944	OitFiles450.exe	85
PID 4944 wrote to memory of 1432	4944	OitFiles450.exe	85
PID 1432 wrote to memory of 4500	1432	cmd.exe	87
PID 1432 wrote to memory of 4500	1432	cmd.exe	87
PID 1432 wrote to memory of 4500	1432	cmd.exe	87

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:4528
- C:\Users\Admin\AppData\Local\Temp\is-GFKQV.tmp\file.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-GFKQV.tmp\file.tmp" /SL5="$80062,1275686,229888,C:\Users\Admin\AppData\Local\Temp\file.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:4416
- - C:\Program Files (x86)\Oit Files\OitFiles450.exe
    "C:\Program Files (x86)\Oit Files\OitFiles450.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:4944
  - - C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\BPqXAAX5x1HlJ.exe
      4⤵
      Executes dropped EXE
      PID:4876
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "OitFiles450.exe" /f & erase "C:\Program Files (x86)\Oit Files\OitFiles450.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:1432
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "OitFiles450.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:4500

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Program Files (x86)\Oit Files\OitFiles450.exe

Filesize
2.1MB

MD5
8e9fa9bb749e75b052afc6d862040007

SHA1
2ae624bb93b3e678e18925fb82b4d914b94304cd

SHA256
ffa0235818fc6c3694a81e1f48e9cf43167ed5aa0e1cdde2621557f5576b736d

SHA512
fc37a2e9dbc4ea408d2c65ca362bbf81b5566a9cec601d7443e679559eb7954b0fc10aa87b07aaf73122daa5907ca05c1c863130d50d7d4298c2a4e543192ad5

Download Submit
C:\Program Files (x86)\Oit Files\OitFiles450.exe

Filesize
2.1MB

MD5
8e9fa9bb749e75b052afc6d862040007

SHA1
2ae624bb93b3e678e18925fb82b4d914b94304cd

SHA256
ffa0235818fc6c3694a81e1f48e9cf43167ed5aa0e1cdde2621557f5576b736d

SHA512
fc37a2e9dbc4ea408d2c65ca362bbf81b5566a9cec601d7443e679559eb7954b0fc10aa87b07aaf73122daa5907ca05c1c863130d50d7d4298c2a4e543192ad5

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-GFKQV.tmp\file.tmp

Filesize
779KB

MD5
70f2afb7b9313b21cd852a33bebe23d8

SHA1
6d17a890977a7434fed0ab6f75f125335af36687

SHA256
3f7c916efbd1fae45d696f00791a93d9ad2adf18b2ee66daddb30a9d431dfe18

SHA512
dd00d319a17ee6eed692aa80426ce5004be98e550fe567c3b5d725d931e258107eb7fe2a2a181ba97b90093674bb50880b78de10ec4e64b75ecde3b303cdc447

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-GFKQV.tmp\file.tmp

Filesize
779KB

MD5
70f2afb7b9313b21cd852a33bebe23d8

SHA1
6d17a890977a7434fed0ab6f75f125335af36687

SHA256
3f7c916efbd1fae45d696f00791a93d9ad2adf18b2ee66daddb30a9d431dfe18

SHA512
dd00d319a17ee6eed692aa80426ce5004be98e550fe567c3b5d725d931e258107eb7fe2a2a181ba97b90093674bb50880b78de10ec4e64b75ecde3b303cdc447

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-MG1KI.tmp\_isetup\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\BPqXAAX5x1HlJ.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\BPqXAAX5x1HlJ.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
memory/4528-132-0x0000000000400000-0x000000000043F000-memory.dmp

Filesize
252KB

Download
memory/4528-155-0x0000000000400000-0x000000000043F000-memory.dmp

Filesize
252KB

Download
memory/4528-138-0x0000000000400000-0x000000000043F000-memory.dmp

Filesize
252KB

Download
memory/4944-143-0x0000000000400000-0x0000000001419000-memory.dmp

Filesize
16.1MB

Download
memory/4944-151-0x0000000000400000-0x0000000001419000-memory.dmp

Filesize
16.1MB

Download
memory/4944-147-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/4944-142-0x0000000000400000-0x0000000001419000-memory.dmp

Filesize
16.1MB

Download
memory/4944-154-0x0000000000400000-0x0000000001419000-memory.dmp

Filesize
16.1MB

Download

Analysis

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