gcleaner | 71c1eb652d1caf9c3f99843026fafba182f1d084b40564ece5915a46d864f015

General

Target

file.exe
Size

1.4MB
MD5

7bf3e054d1d4e7c0c6607444cba38191
SHA1

5b2ae9be4c0370d0e80ef13f421a46dc2fd219c2
SHA256

71c1eb652d1caf9c3f99843026fafba182f1d084b40564ece5915a46d864f015
SHA512

99b0ad876704c4e66db41377d6a3e91bf86f61eeb21623560e319f790c2ba080c90f6acd25f9c862b6d45c5dd0d371b528b99716e32ba018ce00937566bbc6bd
SSDEEP

24576:r20h5ljOYtHBWW2lONM9Krbe06fpiTKRHiuyrqA8mo1XTQB6iKBKhwCbr:r2wBOIBX+r9Ue06BiGhvyrhMxTQBF6C/

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

Executes dropped EXE 3 IoCs

pid	Process
3536	file.tmp
4804	OitFiles450.exe
4932	XEsdQAn.exe

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-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation	OitFiles450.exe

Loads dropped DLL 1 IoCs

pid	Process
3536	file.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 17 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\Oit Files\language\is-G418H.tmp	file.tmp
File created	C:\Program Files (x86)\Oit Files\language\is-K7C0K.tmp	file.tmp
File opened for modification	C:\Program Files (x86)\Oit Files\unins000.dat	file.tmp
File created	C:\Program Files (x86)\Oit Files\language\is-4I5TA.tmp	file.tmp
File created	C:\Program Files (x86)\Oit Files\is-JKLV7.tmp	file.tmp
File created	C:\Program Files (x86)\Oit Files\language\is-TKHHB.tmp	file.tmp
File created	C:\Program Files (x86)\Oit Files\is-JCN94.tmp	file.tmp
File created	C:\Program Files (x86)\Oit Files\is-T1A81.tmp	file.tmp
File created	C:\Program Files (x86)\Oit Files\unins000.dat	file.tmp
File created	C:\Program Files (x86)\Oit Files\is-BC00N.tmp	file.tmp
File created	C:\Program Files (x86)\Oit Files\language\is-MMNF1.tmp	file.tmp
File created	C:\Program Files (x86)\Oit Files\language\is-5H9ID.tmp	file.tmp
File created	C:\Program Files (x86)\Oit Files\language\is-SVQU2.tmp	file.tmp
File created	C:\Program Files (x86)\Oit Files\language\is-HJDNV.tmp	file.tmp
File created	C:\Program Files (x86)\Oit Files\language\is-1048P.tmp	file.tmp
File created	C:\Program Files (x86)\Oit Files\is-MPKKS.tmp	file.tmp
File opened for modification	C:\Program Files (x86)\Oit Files\OitFiles450.exe	file.tmp

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

System Information Discovery
T1082

Kills process with taskkill 1 IoCs

evasion

pid	Process
3488	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4804	OitFiles450.exe
4804	OitFiles450.exe
4804	OitFiles450.exe
4804	OitFiles450.exe
4804	OitFiles450.exe
4804	OitFiles450.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3488	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4616 wrote to memory of 3536	4616	file.exe	81
PID 4616 wrote to memory of 3536	4616	file.exe	81
PID 4616 wrote to memory of 3536	4616	file.exe	81
PID 3536 wrote to memory of 4804	3536	file.tmp	82
PID 3536 wrote to memory of 4804	3536	file.tmp	82
PID 3536 wrote to memory of 4804	3536	file.tmp	82
PID 4804 wrote to memory of 4932	4804	OitFiles450.exe	83
PID 4804 wrote to memory of 4932	4804	OitFiles450.exe	83
PID 4804 wrote to memory of 4932	4804	OitFiles450.exe	83
PID 4804 wrote to memory of 3568	4804	OitFiles450.exe	91
PID 4804 wrote to memory of 3568	4804	OitFiles450.exe	91
PID 4804 wrote to memory of 3568	4804	OitFiles450.exe	91
PID 3568 wrote to memory of 3488	3568	cmd.exe	93
PID 3568 wrote to memory of 3488	3568	cmd.exe	93
PID 3568 wrote to memory of 3488	3568	cmd.exe	93

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:4616
- C:\Users\Admin\AppData\Local\Temp\is-EO12R.tmp\file.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-EO12R.tmp\file.tmp" /SL5="$701F8,1194351,229888,C:\Users\Admin\AppData\Local\Temp\file.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:3536
- - C:\Program Files (x86)\Oit Files\OitFiles450.exe
    "C:\Program Files (x86)\Oit Files\OitFiles450.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:4804
  - - C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\XEsdQAn.exe
      4⤵
      Executes dropped EXE
      PID:4932
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "OitFiles450.exe" /f & erase "C:\Program Files (x86)\Oit Files\OitFiles450.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:3568
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "OitFiles450.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:3488

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)\Oit Files\OitFiles450.exe

Filesize
2.0MB

MD5
ade723475c2dab13347fe98721cb14ae

SHA1
9a355c9836d936bddc29a35cd9e5eb59509d02f4

SHA256
2c54c0310c8f3b19b1862364c9a67a35ad09b10aee4cbf71ce4054982f37249d

SHA512
041f633538420346e76d2dc28fe7ce0ba6e8f7cb104ea500ea537ce32207696db95f599a0eb952587c05bc8190a01ad30bac5f6fc32a23377336674ea0b19268

Download Submit
C:\Program Files (x86)\Oit Files\OitFiles450.exe

Filesize
2.0MB

MD5
ade723475c2dab13347fe98721cb14ae

SHA1
9a355c9836d936bddc29a35cd9e5eb59509d02f4

SHA256
2c54c0310c8f3b19b1862364c9a67a35ad09b10aee4cbf71ce4054982f37249d

SHA512
041f633538420346e76d2dc28fe7ce0ba6e8f7cb104ea500ea537ce32207696db95f599a0eb952587c05bc8190a01ad30bac5f6fc32a23377336674ea0b19268

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-5ME0L.tmp\_isetup\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-EO12R.tmp\file.tmp

Filesize
779KB

MD5
70f2afb7b9313b21cd852a33bebe23d8

SHA1
6d17a890977a7434fed0ab6f75f125335af36687

SHA256
3f7c916efbd1fae45d696f00791a93d9ad2adf18b2ee66daddb30a9d431dfe18

SHA512
dd00d319a17ee6eed692aa80426ce5004be98e550fe567c3b5d725d931e258107eb7fe2a2a181ba97b90093674bb50880b78de10ec4e64b75ecde3b303cdc447

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-EO12R.tmp\file.tmp

Filesize
779KB

MD5
70f2afb7b9313b21cd852a33bebe23d8

SHA1
6d17a890977a7434fed0ab6f75f125335af36687

SHA256
3f7c916efbd1fae45d696f00791a93d9ad2adf18b2ee66daddb30a9d431dfe18

SHA512
dd00d319a17ee6eed692aa80426ce5004be98e550fe567c3b5d725d931e258107eb7fe2a2a181ba97b90093674bb50880b78de10ec4e64b75ecde3b303cdc447

Download Submit
C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\XEsdQAn.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\XEsdQAn.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
memory/4616-156-0x0000000000400000-0x000000000043F000-memory.dmp

Filesize
252KB

Download
memory/4616-137-0x0000000000400000-0x000000000043F000-memory.dmp

Filesize
252KB

Download
memory/4616-132-0x0000000000400000-0x000000000043F000-memory.dmp

Filesize
252KB

Download
memory/4804-143-0x0000000000400000-0x0000000001402000-memory.dmp

Filesize
16.0MB

Download
memory/4804-148-0x0000000000400000-0x0000000001402000-memory.dmp

Filesize
16.0MB

Download
memory/4804-149-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/4804-144-0x0000000000400000-0x0000000001402000-memory.dmp

Filesize
16.0MB

Download
memory/4804-142-0x0000000000400000-0x0000000001402000-memory.dmp

Filesize
16.0MB

Download
memory/4804-155-0x0000000000400000-0x0000000001402000-memory.dmp

Filesize
16.0MB

Download

Analysis

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