gcleaner | 0bbe14bcb6a69eab510f6223256ce356b2d0d21dd4ff449594217bfccef9bb84

General

Target

4a75d423320fd96f2702fc780f438337c7b3e1754b0ee590a021cf8b3094ef87.exe
Size

2.4MB
MD5

b2c6b3363df999810d16e871f5124581
SHA1

b2ac167eacdd584b712d5460f91365168addbd65
SHA256

4a75d423320fd96f2702fc780f438337c7b3e1754b0ee590a021cf8b3094ef87
SHA512

7da471485cc38cf91d246e8d46606c4ec619ae5b867cc234de0aba47f5caaec95f61242f20e92328618386c431584b30c85fa6ec0c864043389c6f9cf53028f5
SSDEEP

49152:Z2P/vOk2Cz2bnnZ9wRmTb0YtY1UBX8gjjMh8+V/B5c8wmbNczX5z9Ap0cnWfA5hq:Mfd2w2zPww0YY1CX8OcV/TRwmW1zBqWt

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
Gcleaner family
gcleaner

Executes dropped EXE 2 IoCs

pid	Process
1704	is-O6947.tmp
2740	fbsearcher62.exe

Loads dropped DLL 5 IoCs

pid	Process
3060	4a75d423320fd96f2702fc780f438337c7b3e1754b0ee590a021cf8b3094ef87.exe
1704	is-O6947.tmp
1704	is-O6947.tmp
1704	is-O6947.tmp
1704	is-O6947.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 12 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\fbSearcher\unins000.dat	is-O6947.tmp
File created	C:\Program Files (x86)\fbSearcher\is-BGVIS.tmp	is-O6947.tmp
File created	C:\Program Files (x86)\fbSearcher\is-DTNEC.tmp	is-O6947.tmp
File created	C:\Program Files (x86)\fbSearcher\is-TSPBD.tmp	is-O6947.tmp
File created	C:\Program Files (x86)\fbSearcher\is-JEDS5.tmp	is-O6947.tmp
File opened for modification	C:\Program Files (x86)\fbSearcher\unins000.dat	is-O6947.tmp
File created	C:\Program Files (x86)\fbSearcher\is-J2S4K.tmp	is-O6947.tmp
File created	C:\Program Files (x86)\fbSearcher\is-82FUJ.tmp	is-O6947.tmp
File created	C:\Program Files (x86)\fbSearcher\is-N8K6M.tmp	is-O6947.tmp
File created	C:\Program Files (x86)\fbSearcher\is-LULH0.tmp	is-O6947.tmp
File created	C:\Program Files (x86)\fbSearcher\is-J7NHL.tmp	is-O6947.tmp
File opened for modification	C:\Program Files (x86)\fbSearcher\fbsearcher62.exe	is-O6947.tmp

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	4a75d423320fd96f2702fc780f438337c7b3e1754b0ee590a021cf8b3094ef87.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	is-O6947.tmp
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	fbsearcher62.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2740	fbsearcher62.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 3060 wrote to memory of 1704	3060	4a75d423320fd96f2702fc780f438337c7b3e1754b0ee590a021cf8b3094ef87.exe	30
PID 3060 wrote to memory of 1704	3060	4a75d423320fd96f2702fc780f438337c7b3e1754b0ee590a021cf8b3094ef87.exe	30
PID 3060 wrote to memory of 1704	3060	4a75d423320fd96f2702fc780f438337c7b3e1754b0ee590a021cf8b3094ef87.exe	30
PID 3060 wrote to memory of 1704	3060	4a75d423320fd96f2702fc780f438337c7b3e1754b0ee590a021cf8b3094ef87.exe	30
PID 3060 wrote to memory of 1704	3060	4a75d423320fd96f2702fc780f438337c7b3e1754b0ee590a021cf8b3094ef87.exe	30
PID 3060 wrote to memory of 1704	3060	4a75d423320fd96f2702fc780f438337c7b3e1754b0ee590a021cf8b3094ef87.exe	30
PID 3060 wrote to memory of 1704	3060	4a75d423320fd96f2702fc780f438337c7b3e1754b0ee590a021cf8b3094ef87.exe	30
PID 1704 wrote to memory of 2740	1704	is-O6947.tmp	31
PID 1704 wrote to memory of 2740	1704	is-O6947.tmp	31
PID 1704 wrote to memory of 2740	1704	is-O6947.tmp	31
PID 1704 wrote to memory of 2740	1704	is-O6947.tmp	31

C:\Users\Admin\AppData\Local\Temp\4a75d423320fd96f2702fc780f438337c7b3e1754b0ee590a021cf8b3094ef87.exe
"C:\Users\Admin\AppData\Local\Temp\4a75d423320fd96f2702fc780f438337c7b3e1754b0ee590a021cf8b3094ef87.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3060
- C:\Users\Admin\AppData\Local\Temp\is-B2PDR.tmp\is-O6947.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-B2PDR.tmp\is-O6947.tmp" /SL4 $40152 "C:\Users\Admin\AppData\Local\Temp\4a75d423320fd96f2702fc780f438337c7b3e1754b0ee590a021cf8b3094ef87.exe" 2311436 52736
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1704
- - C:\Program Files (x86)\fbSearcher\fbsearcher62.exe
    "C:\Program Files (x86)\fbSearcher\fbsearcher62.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: GetForegroundWindowSpam
    PID:2740

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

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

\Program Files (x86)\fbSearcher\fbsearcher62.exe

Filesize
3.8MB

MD5
491cdf7b3490fc39ba9fe362705ea216

SHA1
31c07f3f5989a1e77b499d9ce50801a7b76d249a

SHA256
2449e098b688a50d4897c202e790f7d1450a56a73ef5109417ea50bd9d38c5c3

SHA512
1cd931e8140e3ee55653e0094c8217300b5cd882845a76780a854775e0fc698511542ac65b4ba2c5a5c5c62ffb17262f924b153812de413cffd0f9177d01cab0

Download Submit
\Users\Admin\AppData\Local\Temp\is-B2PDR.tmp\is-O6947.tmp

Filesize
657KB

MD5
7cd12c54a9751ca6eee6ab0c85fb68f5

SHA1
76562e9b7888b6d20d67addb5a90b68b54a51987

SHA256
e82cabb027db8846c3430be760f137afa164c36f9e1b93a6e34c96de0b2c5a5f

SHA512
27ba5d2f719aaac2ead6fb42f23af3aa866f75026be897cd2f561f3e383904e89e6043bd22b4ae24f69787bd258a68ff696c09c03d656cbf7c79c2a52d8d82cc

Download Submit
\Users\Admin\AppData\Local\Temp\is-NH590.tmp\_isetup\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
\Users\Admin\AppData\Local\Temp\is-NH590.tmp\_isetup\_shfoldr.dll

Filesize
22KB

MD5
92dc6ef532fbb4a5c3201469a5b5eb63

SHA1
3e89ff837147c16b4e41c30d6c796374e0b8e62c

SHA256
9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

SHA512
9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

Download Submit
memory/1704-19-0x0000000000400000-0x00000000004B3000-memory.dmp

Filesize
716KB

Download
memory/1704-44-0x0000000003960000-0x0000000004B29000-memory.dmp

Filesize
17.8MB

Download
memory/1704-47-0x0000000000400000-0x00000000004B3000-memory.dmp

Filesize
716KB

Download
memory/1704-48-0x0000000003960000-0x0000000004B29000-memory.dmp

Filesize
17.8MB

Download
memory/2740-45-0x0000000000400000-0x00000000015C9000-memory.dmp

Filesize
17.8MB

Download
memory/2740-46-0x0000000000400000-0x00000000015C9000-memory.dmp

Filesize
17.8MB

Download
memory/2740-51-0x0000000000400000-0x00000000015C9000-memory.dmp

Filesize
17.8MB

Download
memory/3060-0-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/3060-3-0x0000000000401000-0x000000000040B000-memory.dmp

Filesize
40KB

Download
memory/3060-49-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download

Analysis

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