gcleaner | 707b0327124d25b828dc2ac17325da53332fbd11876bfc9bd8c2552a8cfcd6a7

General

Target

file.exe
Size

2.0MB
MD5

073e9528d78a9776c2e0efe05bc42cfe
SHA1

5048466756842311abf0e14e4eb2a31d36d9e4a6
SHA256

707b0327124d25b828dc2ac17325da53332fbd11876bfc9bd8c2552a8cfcd6a7
SHA512

2d62ddf4f4dddef3e9cd01c3610e9320ccc2cf8150ee0ce6f3dc7bc9d647ce65746fcce6e2107d70ed7ac6a3cc8978b21f15ee679f907cb378478c221597b33f
SSDEEP

49152:iiFlhf5F0qWZbMCV18LI6KWtdtWZS6dH/ws8wuC:iiFklZDjCVES6dH/r/

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-1-5-21-1529757233-3489015626-3409890339-1000\Control Panel\International\Geo\Nation	Rec527.exe

Executes dropped EXE 3 IoCs

pid	Process
1060	is-8509M.tmp
1428	Rec527.exe
1140	EwcExaFbResTDP.exe

Loads dropped DLL 1 IoCs

pid	Process
1060	is-8509M.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)\FLRCover\Rec527\is-58PLH.tmp	is-8509M.tmp
File created	C:\Program Files (x86)\FLRCover\Rec527\is-H08VD.tmp	is-8509M.tmp
File created	C:\Program Files (x86)\FLRCover\Rec527\is-KV0DI.tmp	is-8509M.tmp
File created	C:\Program Files (x86)\FLRCover\Rec527\is-0KC01.tmp	is-8509M.tmp
File created	C:\Program Files (x86)\FLRCover\Rec527\is-VIK7U.tmp	is-8509M.tmp
File created	C:\Program Files (x86)\FLRCover\Rec527\data\is-LUE6T.tmp	is-8509M.tmp
File opened for modification	C:\Program Files (x86)\FLRCover\Rec527\unins000.dat	is-8509M.tmp
File opened for modification	C:\Program Files (x86)\FLRCover\Rec527\Rec527.exe	is-8509M.tmp
File created	C:\Program Files (x86)\FLRCover\Rec527\unins000.dat	is-8509M.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
2924	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
1428	Rec527.exe
1428	Rec527.exe
1428	Rec527.exe
1428	Rec527.exe
1428	Rec527.exe
1428	Rec527.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2924	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 1452 wrote to memory of 1060	1452	file.exe	84
PID 1452 wrote to memory of 1060	1452	file.exe	84
PID 1452 wrote to memory of 1060	1452	file.exe	84
PID 1060 wrote to memory of 1428	1060	is-8509M.tmp	85
PID 1060 wrote to memory of 1428	1060	is-8509M.tmp	85
PID 1060 wrote to memory of 1428	1060	is-8509M.tmp	85
PID 1428 wrote to memory of 1140	1428	Rec527.exe	86
PID 1428 wrote to memory of 1140	1428	Rec527.exe	86
PID 1428 wrote to memory of 1140	1428	Rec527.exe	86
PID 1428 wrote to memory of 4948	1428	Rec527.exe	94
PID 1428 wrote to memory of 4948	1428	Rec527.exe	94
PID 1428 wrote to memory of 4948	1428	Rec527.exe	94
PID 4948 wrote to memory of 2924	4948	cmd.exe	96
PID 4948 wrote to memory of 2924	4948	cmd.exe	96
PID 4948 wrote to memory of 2924	4948	cmd.exe	96

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1452
- C:\Users\Admin\AppData\Local\Temp\is-QRI7M.tmp\is-8509M.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-QRI7M.tmp\is-8509M.tmp" /SL4 $1A0022 "C:\Users\Admin\AppData\Local\Temp\file.exe" 1903161 52224
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:1060
- - C:\Program Files (x86)\FLRCover\Rec527\Rec527.exe
    "C:\Program Files (x86)\FLRCover\Rec527\Rec527.exe"
    3⤵
    - Checks computer location settings
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:1428
  - - C:\Users\Admin\AppData\Roaming\{7f74da3b-b191-11ed-abe8-806e6f6e6963}\EwcExaFbResTDP.exe
      4⤵
      Executes dropped EXE
      PID:1140
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "Rec527.exe" /f & erase "C:\Program Files (x86)\FLRCover\Rec527\Rec527.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:4948
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "Rec527.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:2924

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)\FLRCover\Rec527\Rec527.exe

Filesize
2.4MB

MD5
d28c0030c9076db3eac651205e897d22

SHA1
2a0a72fe54861a64eeb3cc0fdd770a35409886fd

SHA256
9e159c18bf00d3ed5edff1e54d569c29992b99f5def65d089f5b6af756a95d1b

SHA512
ee230688f5813428e834def97e953eba12898dc72179b1f15ab7bb3a2a06cc2cb4c3a3a3e9f5a58d948668971eee0ebd634d027695c0bd9074a785e9f4328f40

Download Submit
C:\Program Files (x86)\FLRCover\Rec527\Rec527.exe

Filesize
2.4MB

MD5
d28c0030c9076db3eac651205e897d22

SHA1
2a0a72fe54861a64eeb3cc0fdd770a35409886fd

SHA256
9e159c18bf00d3ed5edff1e54d569c29992b99f5def65d089f5b6af756a95d1b

SHA512
ee230688f5813428e834def97e953eba12898dc72179b1f15ab7bb3a2a06cc2cb4c3a3a3e9f5a58d948668971eee0ebd634d027695c0bd9074a785e9f4328f40

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\IE\4HAJQ22Y\dll[1].htm

Filesize
1B

MD5
cfcd208495d565ef66e7dff9f98764da

SHA1
b6589fc6ab0dc82cf12099d1c2d40ab994e8410c

SHA256
5feceb66ffc86f38d952786c6d696c79c2dbc239dd4e91b46729d73a27fb57e9

SHA512
31bca02094eb78126a517b206a88c73cfa9ec6f704c7030d18212cace820f025f00bf0ea68dbf3f3a5436ca63b53bf7bf80ad8d5de7d8359d0b7fed9dbc3ab99

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-3FJ1U.tmp\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-QRI7M.tmp\is-8509M.tmp

Filesize
644KB

MD5
1f2bc482c99f55a713cf6ca3c1ff04f8

SHA1
852bacef61b885aa31afc7f615de6c6af0f715f4

SHA256
0a0d0b1916549cf997e2110a768d5bd088f5d1390960c22cb9609fe722779dcf

SHA512
a0ece5740fadbdb08f8a9efdb5e72b56198cfb35981835e03dafd2ad09d61bc592e602887d7cf65c58fc19b26caea653c1b5e5d4f35a85ebdc784300aa6948e9

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-QRI7M.tmp\is-8509M.tmp

Filesize
644KB

MD5
1f2bc482c99f55a713cf6ca3c1ff04f8

SHA1
852bacef61b885aa31afc7f615de6c6af0f715f4

SHA256
0a0d0b1916549cf997e2110a768d5bd088f5d1390960c22cb9609fe722779dcf

SHA512
a0ece5740fadbdb08f8a9efdb5e72b56198cfb35981835e03dafd2ad09d61bc592e602887d7cf65c58fc19b26caea653c1b5e5d4f35a85ebdc784300aa6948e9

Download Submit
C:\Users\Admin\AppData\Roaming\{7f74da3b-b191-11ed-abe8-806e6f6e6963}\EwcExaFbResTDP.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
C:\Users\Admin\AppData\Roaming\{7f74da3b-b191-11ed-abe8-806e6f6e6963}\EwcExaFbResTDP.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
memory/1060-180-0x0000000000400000-0x00000000004CF000-memory.dmp

Filesize
828KB

Download
memory/1060-159-0x00000000006A0000-0x00000000006A1000-memory.dmp

Filesize
4KB

Download
memory/1060-198-0x0000000000400000-0x00000000004CF000-memory.dmp

Filesize
828KB

Download
memory/1428-166-0x0000000000400000-0x0000000001464000-memory.dmp

Filesize
16.4MB

Download
memory/1428-174-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/1428-182-0x0000000000400000-0x0000000001464000-memory.dmp

Filesize
16.4MB

Download
memory/1428-197-0x0000000000400000-0x0000000001464000-memory.dmp

Filesize
16.4MB

Download
memory/1428-165-0x0000000000400000-0x0000000001464000-memory.dmp

Filesize
16.4MB

Download
memory/1452-178-0x0000000000400000-0x0000000000413000-memory.dmp

Filesize
76KB

Download
memory/1452-133-0x0000000000400000-0x0000000000413000-memory.dmp

Filesize
76KB

Download
memory/1452-199-0x0000000000400000-0x0000000000413000-memory.dmp

Filesize
76KB

Download

Analysis

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