gcleaner | c302a2c99906b5b93406bafe03fa08f845d545bd8c5799c9e3c2fa4209c091b6

General

Target

file.exe
Size

1.3MB
MD5

3e9fdfad98a957c88dc532647c366c9e
SHA1

c52a705c8320ba86855b97ad27edfba382fdee23
SHA256

c302a2c99906b5b93406bafe03fa08f845d545bd8c5799c9e3c2fa4209c091b6
SHA512

be9f04fb9ffbf28ce6c3e75543e45537770a7f68f36e85cb6e10065e6d18b26f68f27f933c9a80982e1d362edd9af60921ea339bf6281ffd7b6008519fe75a25
SSDEEP

24576:g20hhVV4CHR+zYrYnIJv1S8MAlzP6yLYy+wcNiWI4hdUdfRLYf+kATuCqtn/:g2QVdoYsI/K4zPoFwNuAd1kATuCE/

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
4980	file.tmp
2104	NitFiles451.exe
1952	i2Bdz.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-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation	NitFiles451.exe

Loads dropped DLL 1 IoCs

pid	Process
4980	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)\Nit Files\unins000.dat	file.tmp
File created	C:\Program Files (x86)\Nit Files\language\is-2RHG1.tmp	file.tmp
File created	C:\Program Files (x86)\Nit Files\language\is-SEL16.tmp	file.tmp
File created	C:\Program Files (x86)\Nit Files\language\is-D6K3C.tmp	file.tmp
File created	C:\Program Files (x86)\Nit Files\is-U1FCG.tmp	file.tmp
File created	C:\Program Files (x86)\Nit Files\language\is-RBTBQ.tmp	file.tmp
File created	C:\Program Files (x86)\Nit Files\language\is-KUL1A.tmp	file.tmp
File created	C:\Program Files (x86)\Nit Files\language\is-DR950.tmp	file.tmp
File created	C:\Program Files (x86)\Nit Files\is-2FUUE.tmp	file.tmp
File created	C:\Program Files (x86)\Nit Files\is-01TG6.tmp	file.tmp
File created	C:\Program Files (x86)\Nit Files\language\is-3P9C6.tmp	file.tmp
File opened for modification	C:\Program Files (x86)\Nit Files\unins000.dat	file.tmp
File opened for modification	C:\Program Files (x86)\Nit Files\NitFiles451.exe	file.tmp
File created	C:\Program Files (x86)\Nit Files\is-9I2V2.tmp	file.tmp
File created	C:\Program Files (x86)\Nit Files\language\is-0R8AQ.tmp	file.tmp
File created	C:\Program Files (x86)\Nit Files\language\is-611PL.tmp	file.tmp
File created	C:\Program Files (x86)\Nit Files\is-5SVHE.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
4184	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2104	NitFiles451.exe
2104	NitFiles451.exe
2104	NitFiles451.exe
2104	NitFiles451.exe
2104	NitFiles451.exe
2104	NitFiles451.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4184	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4960 wrote to memory of 4980	4960	file.exe	82
PID 4960 wrote to memory of 4980	4960	file.exe	82
PID 4960 wrote to memory of 4980	4960	file.exe	82
PID 4980 wrote to memory of 2104	4980	file.tmp	83
PID 4980 wrote to memory of 2104	4980	file.tmp	83
PID 4980 wrote to memory of 2104	4980	file.tmp	83
PID 2104 wrote to memory of 1952	2104	NitFiles451.exe	86
PID 2104 wrote to memory of 1952	2104	NitFiles451.exe	86
PID 2104 wrote to memory of 1952	2104	NitFiles451.exe	86
PID 2104 wrote to memory of 3508	2104	NitFiles451.exe	92
PID 2104 wrote to memory of 3508	2104	NitFiles451.exe	92
PID 2104 wrote to memory of 3508	2104	NitFiles451.exe	92
PID 3508 wrote to memory of 4184	3508	cmd.exe	94
PID 3508 wrote to memory of 4184	3508	cmd.exe	94
PID 3508 wrote to memory of 4184	3508	cmd.exe	94

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:4960
- C:\Users\Admin\AppData\Local\Temp\is-7R00T.tmp\file.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-7R00T.tmp\file.tmp" /SL5="$C003A,1131115,233984,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:4980
- - 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:2104
  - - C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\i2Bdz.exe
      4⤵
      Executes dropped EXE
      PID:1952
  - - 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:3508
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "NitFiles451.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:4184

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
1.9MB

MD5
e35036e92fe3426d2e218d1a3cc7ea8b

SHA1
00f5ee91d93e2179a6a641369485586a30f25aaf

SHA256
5359910f896fb788ac375dc59525163c478a1cf1ef3358598de5c83763d7f8b6

SHA512
c7cafa9cd4d4ee6154114dfa697f5b88d851e0b3fe8affcf6c2342a41ce6d2901121929ba73745f71a7f18e05e39641f1be7912932c5158257c83532f557b51f

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

Filesize
1.9MB

MD5
e35036e92fe3426d2e218d1a3cc7ea8b

SHA1
00f5ee91d93e2179a6a641369485586a30f25aaf

SHA256
5359910f896fb788ac375dc59525163c478a1cf1ef3358598de5c83763d7f8b6

SHA512
c7cafa9cd4d4ee6154114dfa697f5b88d851e0b3fe8affcf6c2342a41ce6d2901121929ba73745f71a7f18e05e39641f1be7912932c5158257c83532f557b51f

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-7R00T.tmp\file.tmp

Filesize
849KB

MD5
56c525b0e7751035562a3bd35096b17d

SHA1
befb8a8e73e296e95412b319bc20f76fb382d525

SHA256
6fbb6401d3de1f971f182f9292e817fbeee537725cd5a5974b2bd7bd90a26559

SHA512
75e793a12229ac68cc5ed92d97c1db55dbeb1712cb5377fc2323363e4ffd026f2e68c7852fa0eb6837c8ba7f5449a70160c3cadb49c062c4dc53cdbccdf6d354

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-7R00T.tmp\file.tmp

Filesize
849KB

MD5
56c525b0e7751035562a3bd35096b17d

SHA1
befb8a8e73e296e95412b319bc20f76fb382d525

SHA256
6fbb6401d3de1f971f182f9292e817fbeee537725cd5a5974b2bd7bd90a26559

SHA512
75e793a12229ac68cc5ed92d97c1db55dbeb1712cb5377fc2323363e4ffd026f2e68c7852fa0eb6837c8ba7f5449a70160c3cadb49c062c4dc53cdbccdf6d354

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-O4ED8.tmp\_isetup\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\i2Bdz.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\i2Bdz.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
memory/2104-146-0x0000000000400000-0x00000000013E9000-memory.dmp

Filesize
15.9MB

Download
memory/2104-145-0x0000000000400000-0x00000000013E9000-memory.dmp

Filesize
15.9MB

Download
memory/2104-150-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/2104-155-0x0000000000400000-0x00000000013E9000-memory.dmp

Filesize
15.9MB

Download
memory/2104-158-0x0000000000400000-0x00000000013E9000-memory.dmp

Filesize
15.9MB

Download
memory/4960-135-0x0000000000400000-0x0000000000440000-memory.dmp

Filesize
256KB

Download
memory/4960-137-0x0000000000400000-0x0000000000440000-memory.dmp

Filesize
256KB

Download
memory/4960-154-0x0000000000400000-0x0000000000440000-memory.dmp

Filesize
256KB

Download
memory/4960-159-0x0000000000400000-0x0000000000440000-memory.dmp

Filesize
256KB

Download

Analysis

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