gcleaner | a4b21fc1aaa437e48d206e3b03415071ee2432ac8a55066c754bba4f4f481bfa

General

Target

file.exe
Size

1.5MB
MD5

156d2e09606547041590611377e13213
SHA1

2386febf8b3c8ca2f7cb8a2a83d4780bb21419cc
SHA256

a4b21fc1aaa437e48d206e3b03415071ee2432ac8a55066c754bba4f4f481bfa
SHA512

7284941855f7a4df22617dfe9c3bffee69915fde3bdb56bda5d7d6397a4fa4368e4021e903966fff34b1a2fab20929a9098c4fdf777132784857e22155e23bc2
SSDEEP

49152:g2QV1Jx7BhhXz1WKo3M3KrgvrG2pzWS1q2vvkATuCE/:N837DhXvopMv3lWS1VRTY

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
3384	file.tmp
3696	NitFiles451.exe
4844	4KuStsv.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-1-5-21-2971393436-602173351-1645505021-1000\Control Panel\International\Geo\Nation	NitFiles451.exe

Loads dropped DLL 1 IoCs

pid	Process
3384	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 opened for modification	C:\Program Files (x86)\Nit Files\NitFiles451.exe	file.tmp
File created	C:\Program Files (x86)\Nit Files\language\is-ONK37.tmp	file.tmp
File created	C:\Program Files (x86)\Nit Files\language\is-P63KP.tmp	file.tmp
File created	C:\Program Files (x86)\Nit Files\language\is-EHNJF.tmp	file.tmp
File created	C:\Program Files (x86)\Nit Files\is-D2T1P.tmp	file.tmp
File created	C:\Program Files (x86)\Nit Files\is-7I8JJ.tmp	file.tmp
File created	C:\Program Files (x86)\Nit Files\language\is-QOFF1.tmp	file.tmp
File created	C:\Program Files (x86)\Nit Files\language\is-QA6SH.tmp	file.tmp
File created	C:\Program Files (x86)\Nit Files\language\is-BTGEF.tmp	file.tmp
File created	C:\Program Files (x86)\Nit Files\is-JGRVV.tmp	file.tmp
File created	C:\Program Files (x86)\Nit Files\language\is-E3MEA.tmp	file.tmp
File opened for modification	C:\Program Files (x86)\Nit Files\unins000.dat	file.tmp
File created	C:\Program Files (x86)\Nit Files\unins000.dat	file.tmp
File created	C:\Program Files (x86)\Nit Files\is-55ET8.tmp	file.tmp
File created	C:\Program Files (x86)\Nit Files\is-TKAR5.tmp	file.tmp
File created	C:\Program Files (x86)\Nit Files\language\is-1BRSV.tmp	file.tmp
File created	C:\Program Files (x86)\Nit Files\language\is-2BA7P.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
1592	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
3696	NitFiles451.exe
3696	NitFiles451.exe
3696	NitFiles451.exe
3696	NitFiles451.exe
3696	NitFiles451.exe
3696	NitFiles451.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1592	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4796 wrote to memory of 3384	4796	file.exe	79
PID 4796 wrote to memory of 3384	4796	file.exe	79
PID 4796 wrote to memory of 3384	4796	file.exe	79
PID 3384 wrote to memory of 3696	3384	file.tmp	80
PID 3384 wrote to memory of 3696	3384	file.tmp	80
PID 3384 wrote to memory of 3696	3384	file.tmp	80
PID 3696 wrote to memory of 4844	3696	NitFiles451.exe	81
PID 3696 wrote to memory of 4844	3696	NitFiles451.exe	81
PID 3696 wrote to memory of 4844	3696	NitFiles451.exe	81
PID 3696 wrote to memory of 2120	3696	NitFiles451.exe	89
PID 3696 wrote to memory of 2120	3696	NitFiles451.exe	89
PID 3696 wrote to memory of 2120	3696	NitFiles451.exe	89
PID 2120 wrote to memory of 1592	2120	cmd.exe	91
PID 2120 wrote to memory of 1592	2120	cmd.exe	91
PID 2120 wrote to memory of 1592	2120	cmd.exe	91

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:4796
- C:\Users\Admin\AppData\Local\Temp\is-RSRSJ.tmp\file.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-RSRSJ.tmp\file.tmp" /SL5="$90048,1295053,233984,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:3384
- - C:\Program Files (x86)\Nit Files\NitFiles451.exe
    "C:\Program Files (x86)\Nit Files\NitFiles451.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:3696
  - - C:\Users\Admin\AppData\Roaming\{6e1ce040-6208-11ed-b5ce-806e6f6e6963}\4KuStsv.exe
      4⤵
      Executes dropped EXE
      PID:4844
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "NitFiles451.exe" /f & erase "C:\Program Files (x86)\Nit Files\NitFiles451.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:2120
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "NitFiles451.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:1592

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)\Nit Files\NitFiles451.exe

Filesize
2.1MB

MD5
b6ce4f36ca976f7add306aa029a23bad

SHA1
20a2aa41c26037b967b2fbe8d754452ae4b23ce7

SHA256
7a99dc6eeed914a9463d1d5be372a79a66a30913bb14bb35aa75f40555e92dff

SHA512
2b191b12cebd2cad55faad6a17734a2577f090d7034b239d81cceb3daf06f1b11b1a611c83569d251e8c9c55f507c0f0fb3b8cde0be664ec38140f5cf5917572

Download Submit
C:\Program Files (x86)\Nit Files\NitFiles451.exe

Filesize
2.1MB

MD5
b6ce4f36ca976f7add306aa029a23bad

SHA1
20a2aa41c26037b967b2fbe8d754452ae4b23ce7

SHA256
7a99dc6eeed914a9463d1d5be372a79a66a30913bb14bb35aa75f40555e92dff

SHA512
2b191b12cebd2cad55faad6a17734a2577f090d7034b239d81cceb3daf06f1b11b1a611c83569d251e8c9c55f507c0f0fb3b8cde0be664ec38140f5cf5917572

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-5L974.tmp\_isetup\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

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

Filesize
849KB

MD5
56c525b0e7751035562a3bd35096b17d

SHA1
befb8a8e73e296e95412b319bc20f76fb382d525

SHA256
6fbb6401d3de1f971f182f9292e817fbeee537725cd5a5974b2bd7bd90a26559

SHA512
75e793a12229ac68cc5ed92d97c1db55dbeb1712cb5377fc2323363e4ffd026f2e68c7852fa0eb6837c8ba7f5449a70160c3cadb49c062c4dc53cdbccdf6d354

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

Filesize
849KB

MD5
56c525b0e7751035562a3bd35096b17d

SHA1
befb8a8e73e296e95412b319bc20f76fb382d525

SHA256
6fbb6401d3de1f971f182f9292e817fbeee537725cd5a5974b2bd7bd90a26559

SHA512
75e793a12229ac68cc5ed92d97c1db55dbeb1712cb5377fc2323363e4ffd026f2e68c7852fa0eb6837c8ba7f5449a70160c3cadb49c062c4dc53cdbccdf6d354

Download Submit
C:\Users\Admin\AppData\Roaming\{6e1ce040-6208-11ed-b5ce-806e6f6e6963}\4KuStsv.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
C:\Users\Admin\AppData\Roaming\{6e1ce040-6208-11ed-b5ce-806e6f6e6963}\4KuStsv.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
memory/3696-148-0x0000000000400000-0x000000000141B000-memory.dmp

Filesize
16.1MB

Download
memory/3696-144-0x0000000000400000-0x000000000141B000-memory.dmp

Filesize
16.1MB

Download
memory/3696-143-0x0000000000400000-0x000000000141B000-memory.dmp

Filesize
16.1MB

Download
memory/3696-142-0x0000000000400000-0x000000000141B000-memory.dmp

Filesize
16.1MB

Download
memory/3696-149-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/3696-155-0x0000000000400000-0x000000000141B000-memory.dmp

Filesize
16.1MB

Download
memory/4796-132-0x0000000000400000-0x0000000000440000-memory.dmp

Filesize
256KB

Download
memory/4796-138-0x0000000000400000-0x0000000000440000-memory.dmp

Filesize
256KB

Download
memory/4796-156-0x0000000000400000-0x0000000000440000-memory.dmp

Filesize
256KB

Download

Analysis

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