gcleaner | 0f21fe00bbf2ccfd6e6661c37799f3780486e45ea8283a7f017103ff4ff0e97b

General

Target

0f21fe00bbf2ccfd6e6661c37799f3780486e45ea8283a7f017103ff4ff0e97bN.exe
Size

1.7MB
MD5

15ed058c6dc73fbc3e017a3005fc6be0
SHA1

dd9156d84e989b0631f55948851c62ebc7154f9b
SHA256

0f21fe00bbf2ccfd6e6661c37799f3780486e45ea8283a7f017103ff4ff0e97b
SHA512

f217bac644bb8fd2a6ba21cc4112fc050fc900d4c3c21997516a6a497ed36e021e3746da72585a44a2aa3bbe57ffc964c71512b3166c6326f045b7d4334c4522
SSDEEP

49152:Z2u3AV81h8tsLiYNZ7i6S5M2MRDiYBtA5hq:MHCsYKdK2MRsDq

Score

10^/10

gcleaner discovery loader

Malware Config

Extracted

Family

gcleaner

C2

45.139.105.39

37.139.129.24

45.139.105.66

45.139.105.188

Attributes

url_path
/get.php

/setup.php

/setup.php

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
2412	is-BCL3B.tmp
1268	pec50.exe

Loads dropped DLL 5 IoCs

pid	Process
1272	0f21fe00bbf2ccfd6e6661c37799f3780486e45ea8283a7f017103ff4ff0e97bN.exe
2412	is-BCL3B.tmp
2412	is-BCL3B.tmp
2412	is-BCL3B.tmp
2412	is-BCL3B.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 7 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\PEC Disk Master\is-H65DC.tmp	is-BCL3B.tmp
File created	C:\Program Files (x86)\PEC Disk Master\is-HMFNK.tmp	is-BCL3B.tmp
File created	C:\Program Files (x86)\PEC Disk Master\is-PJI62.tmp	is-BCL3B.tmp
File created	C:\Program Files (x86)\PEC Disk Master\is-Q1GMG.tmp	is-BCL3B.tmp
File opened for modification	C:\Program Files (x86)\PEC Disk Master\unins000.dat	is-BCL3B.tmp
File opened for modification	C:\Program Files (x86)\PEC Disk Master\pec50.exe	is-BCL3B.tmp
File created	C:\Program Files (x86)\PEC Disk Master\unins000.dat	is-BCL3B.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	0f21fe00bbf2ccfd6e6661c37799f3780486e45ea8283a7f017103ff4ff0e97bN.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	is-BCL3B.tmp
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	pec50.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 1272 wrote to memory of 2412	1272	0f21fe00bbf2ccfd6e6661c37799f3780486e45ea8283a7f017103ff4ff0e97bN.exe	30
PID 1272 wrote to memory of 2412	1272	0f21fe00bbf2ccfd6e6661c37799f3780486e45ea8283a7f017103ff4ff0e97bN.exe	30
PID 1272 wrote to memory of 2412	1272	0f21fe00bbf2ccfd6e6661c37799f3780486e45ea8283a7f017103ff4ff0e97bN.exe	30
PID 1272 wrote to memory of 2412	1272	0f21fe00bbf2ccfd6e6661c37799f3780486e45ea8283a7f017103ff4ff0e97bN.exe	30
PID 1272 wrote to memory of 2412	1272	0f21fe00bbf2ccfd6e6661c37799f3780486e45ea8283a7f017103ff4ff0e97bN.exe	30
PID 1272 wrote to memory of 2412	1272	0f21fe00bbf2ccfd6e6661c37799f3780486e45ea8283a7f017103ff4ff0e97bN.exe	30
PID 1272 wrote to memory of 2412	1272	0f21fe00bbf2ccfd6e6661c37799f3780486e45ea8283a7f017103ff4ff0e97bN.exe	30
PID 2412 wrote to memory of 1268	2412	is-BCL3B.tmp	31
PID 2412 wrote to memory of 1268	2412	is-BCL3B.tmp	31
PID 2412 wrote to memory of 1268	2412	is-BCL3B.tmp	31
PID 2412 wrote to memory of 1268	2412	is-BCL3B.tmp	31

C:\Users\Admin\AppData\Local\Temp\0f21fe00bbf2ccfd6e6661c37799f3780486e45ea8283a7f017103ff4ff0e97bN.exe
"C:\Users\Admin\AppData\Local\Temp\0f21fe00bbf2ccfd6e6661c37799f3780486e45ea8283a7f017103ff4ff0e97bN.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1272
- C:\Users\Admin\AppData\Local\Temp\is-LLEKB.tmp\is-BCL3B.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-LLEKB.tmp\is-BCL3B.tmp" /SL4 $4010A "C:\Users\Admin\AppData\Local\Temp\0f21fe00bbf2ccfd6e6661c37799f3780486e45ea8283a7f017103ff4ff0e97bN.exe" 1584229 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:2412
- - C:\Program Files (x86)\PEC Disk Master\pec50.exe
    "C:\Program Files (x86)\PEC Disk Master\pec50.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:1268

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)\PEC Disk Master\pec50.exe

Filesize
2.7MB

MD5
08f6d0c8880379184dc4a0e766da4c2d

SHA1
444bfaa668b7632ac30c72938f37f797499a2c5f

SHA256
749de3675f0a6bd52c9c75ba73a9a447d1db74ac885c6f53a13ddb49d9d664a5

SHA512
a36f20057fe31d18cfb95926c23e21dcd6f80d8f1de5c1e1129fae1b22e7ae7c5e03058a970dde914876de326ae6d22946162383cbdc7d400dc677800fdbed6e

Download Submit
\Users\Admin\AppData\Local\Temp\is-D1126.tmp\_isetup\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
\Users\Admin\AppData\Local\Temp\is-D1126.tmp\_isetup\_shfoldr.dll

Filesize
22KB

MD5
92dc6ef532fbb4a5c3201469a5b5eb63

SHA1
3e89ff837147c16b4e41c30d6c796374e0b8e62c

SHA256
9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

SHA512
9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

Download Submit
\Users\Admin\AppData\Local\Temp\is-LLEKB.tmp\is-BCL3B.tmp

Filesize
657KB

MD5
7cd12c54a9751ca6eee6ab0c85fb68f5

SHA1
76562e9b7888b6d20d67addb5a90b68b54a51987

SHA256
e82cabb027db8846c3430be760f137afa164c36f9e1b93a6e34c96de0b2c5a5f

SHA512
27ba5d2f719aaac2ead6fb42f23af3aa866f75026be897cd2f561f3e383904e89e6043bd22b4ae24f69787bd258a68ff696c09c03d656cbf7c79c2a52d8d82cc

Download Submit
memory/1268-36-0x0000000000400000-0x00000000014AA000-memory.dmp

Filesize
16.7MB

Download
memory/1268-35-0x0000000000400000-0x00000000014AA000-memory.dmp

Filesize
16.7MB

Download
memory/1268-37-0x0000000000400000-0x00000000014AA000-memory.dmp

Filesize
16.7MB

Download
memory/1272-0-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1272-2-0x0000000000401000-0x000000000040B000-memory.dmp

Filesize
40KB

Download
memory/1272-40-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2412-11-0x0000000000400000-0x00000000004B3000-memory.dmp

Filesize
716KB

Download
memory/2412-34-0x0000000003A60000-0x0000000004B0A000-memory.dmp

Filesize
16.7MB

Download
memory/2412-39-0x0000000000400000-0x00000000004B3000-memory.dmp

Filesize
716KB

Download

Analysis

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