gcleaner | b571a0cc42c70b799fb498240d697bd5a66755b574f5704c395a937d95a116bf

General

Target

edec4c408a06a5002559956a3845c1eef195901071abf8c210175e1ee5c1252b.exe
Size

2.4MB
MD5

011728e42d13134d3fb4f258851362d2
SHA1

3c31a474a7f586ff2864bfb9145f8eb1098966cb
SHA256

edec4c408a06a5002559956a3845c1eef195901071abf8c210175e1ee5c1252b
SHA512

86d77e299e2e6b0ed0e986d32ebe3cfecb794d33656b8a24549477129d137120c9ae95b8fd5bfb9db966eab45da8af1cf56c7ea429de54bae6317f9915dac5e4
SSDEEP

49152:Z2Rv5Mj+a7NYr5o1OBKVYO2Q6xpnzHd6obVEXvB8/H154yv8zA5hq:MRv5Mj+aJYr5TEYO6xpz9fbVyB8Nr8UW

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
3060	is-FST0U.tmp
4552	etsearcher58.exe

Loads dropped DLL 1 IoCs

pid	Process
3060	is-FST0U.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)\etSearcher\is-6COG0.tmp	is-FST0U.tmp
File created	C:\Program Files (x86)\etSearcher\is-T64S4.tmp	is-FST0U.tmp
File created	C:\Program Files (x86)\etSearcher\is-7GC98.tmp	is-FST0U.tmp
File created	C:\Program Files (x86)\etSearcher\is-504CH.tmp	is-FST0U.tmp
File opened for modification	C:\Program Files (x86)\etSearcher\etsearcher58.exe	is-FST0U.tmp
File created	C:\Program Files (x86)\etSearcher\unins000.dat	is-FST0U.tmp
File created	C:\Program Files (x86)\etSearcher\is-EUT67.tmp	is-FST0U.tmp
File created	C:\Program Files (x86)\etSearcher\is-IJKVA.tmp	is-FST0U.tmp
File created	C:\Program Files (x86)\etSearcher\is-C8461.tmp	is-FST0U.tmp
File created	C:\Program Files (x86)\etSearcher\is-6VHLT.tmp	is-FST0U.tmp
File opened for modification	C:\Program Files (x86)\etSearcher\unins000.dat	is-FST0U.tmp
File created	C:\Program Files (x86)\etSearcher\is-T1IT4.tmp	is-FST0U.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	edec4c408a06a5002559956a3845c1eef195901071abf8c210175e1ee5c1252b.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	is-FST0U.tmp
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	etsearcher58.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
4552	etsearcher58.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1288 wrote to memory of 3060	1288	edec4c408a06a5002559956a3845c1eef195901071abf8c210175e1ee5c1252b.exe	82
PID 1288 wrote to memory of 3060	1288	edec4c408a06a5002559956a3845c1eef195901071abf8c210175e1ee5c1252b.exe	82
PID 1288 wrote to memory of 3060	1288	edec4c408a06a5002559956a3845c1eef195901071abf8c210175e1ee5c1252b.exe	82
PID 3060 wrote to memory of 4552	3060	is-FST0U.tmp	83
PID 3060 wrote to memory of 4552	3060	is-FST0U.tmp	83
PID 3060 wrote to memory of 4552	3060	is-FST0U.tmp	83

C:\Users\Admin\AppData\Local\Temp\edec4c408a06a5002559956a3845c1eef195901071abf8c210175e1ee5c1252b.exe
"C:\Users\Admin\AppData\Local\Temp\edec4c408a06a5002559956a3845c1eef195901071abf8c210175e1ee5c1252b.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1288
- C:\Users\Admin\AppData\Local\Temp\is-2BKHD.tmp\is-FST0U.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-2BKHD.tmp\is-FST0U.tmp" /SL4 $60062 "C:\Users\Admin\AppData\Local\Temp\edec4c408a06a5002559956a3845c1eef195901071abf8c210175e1ee5c1252b.exe" 2226637 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:3060
- - C:\Program Files (x86)\etSearcher\etsearcher58.exe
    "C:\Program Files (x86)\etSearcher\etsearcher58.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: GetForegroundWindowSpam
    PID:4552

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

C:\Program Files (x86)\etSearcher\etsearcher58.exe

Filesize
3.9MB

MD5
072c31147581f91f309b41c31cf4d8c7

SHA1
4a43c1e17d2615c5a9ec17c8e3bb782e8530df9d

SHA256
81439fca22b5a7d70aacffbe854428c094a39438270c6eed86db52837b70f294

SHA512
663144e14a0bdeb91e8e75e0539ddfd97c2faf496a85c672c9504276add471b65925dc4860fe856d1a827b2053f8f7bd95cf72f92f20d2f6629b1f5a9015d32d

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-2BKHD.tmp\is-FST0U.tmp

Filesize
657KB

MD5
7cd12c54a9751ca6eee6ab0c85fb68f5

SHA1
76562e9b7888b6d20d67addb5a90b68b54a51987

SHA256
e82cabb027db8846c3430be760f137afa164c36f9e1b93a6e34c96de0b2c5a5f

SHA512
27ba5d2f719aaac2ead6fb42f23af3aa866f75026be897cd2f561f3e383904e89e6043bd22b4ae24f69787bd258a68ff696c09c03d656cbf7c79c2a52d8d82cc

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-F2GSK.tmp\_isetup\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
memory/1288-2-0x0000000000401000-0x000000000040B000-memory.dmp

Filesize
40KB

Download
memory/1288-0-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1288-44-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/3060-12-0x0000000000400000-0x00000000004B3000-memory.dmp

Filesize
716KB

Download
memory/3060-43-0x0000000000400000-0x00000000004B3000-memory.dmp

Filesize
716KB

Download
memory/4552-40-0x0000000000400000-0x00000000015F3000-memory.dmp

Filesize
17.9MB

Download
memory/4552-41-0x0000000000400000-0x00000000015F3000-memory.dmp

Filesize
17.9MB

Download
memory/4552-42-0x0000000000400000-0x00000000015F3000-memory.dmp

Filesize
17.9MB

Download
memory/4552-46-0x0000000000400000-0x00000000015F3000-memory.dmp

Filesize
17.9MB

Download

Analysis

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