gcleaner | 8ffab91769a6ff3e57f1c5b26f580e0fe41e6dfe5cf05154dbcb77f181508d49

General

Target

file.exe
Size

1.8MB
MD5

7d64ba2ffbb9df61620ddd934eb8d8c5
SHA1

a158e73747d2f6acdf17dc18494a94b3b1899cb8
SHA256

8ffab91769a6ff3e57f1c5b26f580e0fe41e6dfe5cf05154dbcb77f181508d49
SHA512

40615c54109e0b01a15ceb7cca5c68a3857f71d6a95f187dbeafa2ac07f599a18a84c2e11ec9234b10dd64be532d0b11437c36e2bb14f7b82613c3999aaed783
SSDEEP

49152:A6aKm9kAk4SellJ6XMhFWAetCViT9nldW7s9AG5cq:ABKm9kAkK4XMLoCorg7s9Xcq

Score

10^/10

gcleaner discovery loader

Malware Config

Extracted

Family

gcleaner

C2

45.12.253.56

45.12.253.72

45.12.253.98

45.12.253.75

Signatures

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

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-1-5-21-1013461898-3711306144-4198452673-1000\Control Panel\International\Geo\Nation	Rec53.exe

Executes dropped EXE 3 IoCs

pid	Process
4320	is-CUKUI.tmp
656	Rec53.exe
2096	Od06TzfoGw.exe

Loads dropped DLL 1 IoCs

pid	Process
4320	is-CUKUI.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 9 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\FKSCover\Rec53\unins000.dat	is-CUKUI.tmp
File created	C:\Program Files (x86)\FKSCover\Rec53\is-LP235.tmp	is-CUKUI.tmp
File created	C:\Program Files (x86)\FKSCover\Rec53\data\is-PU5P3.tmp	is-CUKUI.tmp
File opened for modification	C:\Program Files (x86)\FKSCover\Rec53\unins000.dat	is-CUKUI.tmp
File created	C:\Program Files (x86)\FKSCover\Rec53\is-OLBTG.tmp	is-CUKUI.tmp
File created	C:\Program Files (x86)\FKSCover\Rec53\is-6CTDT.tmp	is-CUKUI.tmp
File created	C:\Program Files (x86)\FKSCover\Rec53\is-SLGI8.tmp	is-CUKUI.tmp
File created	C:\Program Files (x86)\FKSCover\Rec53\is-58QVU.tmp	is-CUKUI.tmp
File opened for modification	C:\Program Files (x86)\FKSCover\Rec53\Rec53.exe	is-CUKUI.tmp

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

System Information Discovery
T1082

Kills process with taskkill 1 IoCs

evasion

pid	Process
3092	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
656	Rec53.exe
656	Rec53.exe
656	Rec53.exe
656	Rec53.exe
656	Rec53.exe
656	Rec53.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3092	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 3360 wrote to memory of 4320	3360	file.exe	82
PID 3360 wrote to memory of 4320	3360	file.exe	82
PID 3360 wrote to memory of 4320	3360	file.exe	82
PID 4320 wrote to memory of 656	4320	is-CUKUI.tmp	83
PID 4320 wrote to memory of 656	4320	is-CUKUI.tmp	83
PID 4320 wrote to memory of 656	4320	is-CUKUI.tmp	83
PID 656 wrote to memory of 2096	656	Rec53.exe	84
PID 656 wrote to memory of 2096	656	Rec53.exe	84
PID 656 wrote to memory of 2096	656	Rec53.exe	84
PID 656 wrote to memory of 1440	656	Rec53.exe	85
PID 656 wrote to memory of 1440	656	Rec53.exe	85
PID 656 wrote to memory of 1440	656	Rec53.exe	85
PID 1440 wrote to memory of 3092	1440	cmd.exe	87
PID 1440 wrote to memory of 3092	1440	cmd.exe	87
PID 1440 wrote to memory of 3092	1440	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:3360
- C:\Users\Admin\AppData\Local\Temp\is-79SFE.tmp\is-CUKUI.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-79SFE.tmp\is-CUKUI.tmp" /SL4 $B0046 "C:\Users\Admin\AppData\Local\Temp\file.exe" 1620308 51712
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:4320
- - C:\Program Files (x86)\FKSCover\Rec53\Rec53.exe
    "C:\Program Files (x86)\FKSCover\Rec53\Rec53.exe"
    3⤵
    - Checks computer location settings
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:656
  - - C:\Users\Admin\AppData\Roaming\{9e74baef-b191-11ed-b7c8-806e6f6e6963}\Od06TzfoGw.exe
      4⤵
      Executes dropped EXE
      PID:2096
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "Rec53.exe" /f & erase "C:\Program Files (x86)\FKSCover\Rec53\Rec53.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:1440
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "Rec53.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:3092

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)\FKSCover\Rec53\Rec53.exe

Filesize
1.5MB

MD5
fb06fbeb65f17b8bc2c13bba1c4602e5

SHA1
b67527c8b3b2d5c5464cda291a243bae0c4cce4d

SHA256
eb306ae160c867c239033db063060da96c1e8630f91a55dc26ae65b831334349

SHA512
b035bc33085584d6dd2cce46f2ee469561bceaa93e3ad8513fa03a3553b8ec22e166f0c9fa65aafd9819f7709f1662cf8c8df594e8daf9a9704511f7a3586cf8

Download Submit
C:\Program Files (x86)\FKSCover\Rec53\Rec53.exe

Filesize
1.5MB

MD5
fb06fbeb65f17b8bc2c13bba1c4602e5

SHA1
b67527c8b3b2d5c5464cda291a243bae0c4cce4d

SHA256
eb306ae160c867c239033db063060da96c1e8630f91a55dc26ae65b831334349

SHA512
b035bc33085584d6dd2cce46f2ee469561bceaa93e3ad8513fa03a3553b8ec22e166f0c9fa65aafd9819f7709f1662cf8c8df594e8daf9a9704511f7a3586cf8

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\IE\G1ORIWBN\dll[1].htm

Filesize
1B

MD5
cfcd208495d565ef66e7dff9f98764da

SHA1
b6589fc6ab0dc82cf12099d1c2d40ab994e8410c

SHA256
5feceb66ffc86f38d952786c6d696c79c2dbc239dd4e91b46729d73a27fb57e9

SHA512
31bca02094eb78126a517b206a88c73cfa9ec6f704c7030d18212cace820f025f00bf0ea68dbf3f3a5436ca63b53bf7bf80ad8d5de7d8359d0b7fed9dbc3ab99

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-79SFE.tmp\is-CUKUI.tmp

Filesize
643KB

MD5
72d3c1e3acb10e576f02c9b635ee58d8

SHA1
00345a3076ade8192bf3298e16d5fdf754daf793

SHA256
4ccf3c1393e21c1fb0e525da285d125e9773bb1d554d830b3219f894e3b59fd7

SHA512
30a5c390dbee02ae57e520c118a53e7cfb89bda244c01b519e5fa4ca8b5b2d88c92b99141a720bfc24acc946170e087b2e8ad01f76c83931b1d039dce1f3133a

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-79SFE.tmp\is-CUKUI.tmp

Filesize
643KB

MD5
72d3c1e3acb10e576f02c9b635ee58d8

SHA1
00345a3076ade8192bf3298e16d5fdf754daf793

SHA256
4ccf3c1393e21c1fb0e525da285d125e9773bb1d554d830b3219f894e3b59fd7

SHA512
30a5c390dbee02ae57e520c118a53e7cfb89bda244c01b519e5fa4ca8b5b2d88c92b99141a720bfc24acc946170e087b2e8ad01f76c83931b1d039dce1f3133a

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-FC2PL.tmp\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
C:\Users\Admin\AppData\Roaming\{9e74baef-b191-11ed-b7c8-806e6f6e6963}\Od06TzfoGw.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
C:\Users\Admin\AppData\Roaming\{9e74baef-b191-11ed-b7c8-806e6f6e6963}\Od06TzfoGw.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
memory/656-166-0x0000000000400000-0x0000000001382000-memory.dmp

Filesize
15.5MB

Download
memory/656-165-0x0000000000400000-0x0000000001382000-memory.dmp

Filesize
15.5MB

Download
memory/656-174-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/656-182-0x0000000000400000-0x0000000001382000-memory.dmp

Filesize
15.5MB

Download
memory/656-198-0x0000000000400000-0x0000000001382000-memory.dmp

Filesize
15.5MB

Download
memory/3360-133-0x0000000000400000-0x0000000000413000-memory.dmp

Filesize
76KB

Download
memory/3360-178-0x0000000000400000-0x0000000000413000-memory.dmp

Filesize
76KB

Download
memory/3360-200-0x0000000000400000-0x0000000000413000-memory.dmp

Filesize
76KB

Download
memory/4320-180-0x0000000000400000-0x00000000004CF000-memory.dmp

Filesize
828KB

Download
memory/4320-181-0x0000000002200000-0x0000000002201000-memory.dmp

Filesize
4KB

Download
memory/4320-147-0x0000000002200000-0x0000000002201000-memory.dmp

Filesize
4KB

Download
memory/4320-199-0x0000000000400000-0x00000000004CF000-memory.dmp

Filesize
828KB

Download

Analysis

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