gcleaner | 648efce8340aabf00a3cdfa1c6ae661da837cc6e6af304c2a74c93c63f74d3fa

General

Target

89961de645afe5c55dc9eeeb1394cc92d987a63b52820c05be9bd314f0e1aff0.exe
Size

1.5MB
MD5

ca048aecf3863405e9cc73b663ea2c9c
SHA1

4afbe34921aa6a088f12b9a82356def3b230168d
SHA256

89961de645afe5c55dc9eeeb1394cc92d987a63b52820c05be9bd314f0e1aff0
SHA512

7069400fdb2ba7b875407e0b8bcb5ceef974299147ca986a099a81fefccbb940534f17211ad4641b994abba3fb52816100b2b55591538b613b9f7662d2700df8
SSDEEP

24576:r20h5REdBGY0vgBnT4WlBu/uUfCMgD8f/Heh4vOhwCbr:r2wWdQ9mnTHOuUUD83Heh4m6Cbr

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
2844	89961de645afe5c55dc9eeeb1394cc92d987a63b52820c05be9bd314f0e1aff0.tmp
4952	OitFiles450.exe
2156	eMhdYA.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-1-5-21-2891029575-1462575-1165213807-1000\Control Panel\International\Geo\Nation	OitFiles450.exe

Loads dropped DLL 1 IoCs

pid	Process
2844	89961de645afe5c55dc9eeeb1394cc92d987a63b52820c05be9bd314f0e1aff0.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\is-V12H5.tmp	89961de645afe5c55dc9eeeb1394cc92d987a63b52820c05be9bd314f0e1aff0.tmp
File created	C:\Program Files (x86)\Oit Files\is-9FNVV.tmp	89961de645afe5c55dc9eeeb1394cc92d987a63b52820c05be9bd314f0e1aff0.tmp
File opened for modification	C:\Program Files (x86)\Oit Files\OitFiles450.exe	89961de645afe5c55dc9eeeb1394cc92d987a63b52820c05be9bd314f0e1aff0.tmp
File created	C:\Program Files (x86)\Oit Files\language\is-5OU05.tmp	89961de645afe5c55dc9eeeb1394cc92d987a63b52820c05be9bd314f0e1aff0.tmp
File created	C:\Program Files (x86)\Oit Files\is-BRVGD.tmp	89961de645afe5c55dc9eeeb1394cc92d987a63b52820c05be9bd314f0e1aff0.tmp
File created	C:\Program Files (x86)\Oit Files\unins000.dat	89961de645afe5c55dc9eeeb1394cc92d987a63b52820c05be9bd314f0e1aff0.tmp
File created	C:\Program Files (x86)\Oit Files\language\is-O2U74.tmp	89961de645afe5c55dc9eeeb1394cc92d987a63b52820c05be9bd314f0e1aff0.tmp
File created	C:\Program Files (x86)\Oit Files\language\is-G8M4E.tmp	89961de645afe5c55dc9eeeb1394cc92d987a63b52820c05be9bd314f0e1aff0.tmp
File created	C:\Program Files (x86)\Oit Files\language\is-RQMK6.tmp	89961de645afe5c55dc9eeeb1394cc92d987a63b52820c05be9bd314f0e1aff0.tmp
File created	C:\Program Files (x86)\Oit Files\is-TI5E9.tmp	89961de645afe5c55dc9eeeb1394cc92d987a63b52820c05be9bd314f0e1aff0.tmp
File created	C:\Program Files (x86)\Oit Files\language\is-3UOF8.tmp	89961de645afe5c55dc9eeeb1394cc92d987a63b52820c05be9bd314f0e1aff0.tmp
File created	C:\Program Files (x86)\Oit Files\language\is-HM45R.tmp	89961de645afe5c55dc9eeeb1394cc92d987a63b52820c05be9bd314f0e1aff0.tmp
File opened for modification	C:\Program Files (x86)\Oit Files\unins000.dat	89961de645afe5c55dc9eeeb1394cc92d987a63b52820c05be9bd314f0e1aff0.tmp
File created	C:\Program Files (x86)\Oit Files\is-FUD0C.tmp	89961de645afe5c55dc9eeeb1394cc92d987a63b52820c05be9bd314f0e1aff0.tmp
File created	C:\Program Files (x86)\Oit Files\language\is-PIL62.tmp	89961de645afe5c55dc9eeeb1394cc92d987a63b52820c05be9bd314f0e1aff0.tmp
File created	C:\Program Files (x86)\Oit Files\language\is-F3KJ2.tmp	89961de645afe5c55dc9eeeb1394cc92d987a63b52820c05be9bd314f0e1aff0.tmp
File created	C:\Program Files (x86)\Oit Files\language\is-OM5NK.tmp	89961de645afe5c55dc9eeeb1394cc92d987a63b52820c05be9bd314f0e1aff0.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
4032	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4952	OitFiles450.exe
4952	OitFiles450.exe
4952	OitFiles450.exe
4952	OitFiles450.exe
4952	OitFiles450.exe
4952	OitFiles450.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4032	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2700 wrote to memory of 2844	2700	89961de645afe5c55dc9eeeb1394cc92d987a63b52820c05be9bd314f0e1aff0.exe	80
PID 2700 wrote to memory of 2844	2700	89961de645afe5c55dc9eeeb1394cc92d987a63b52820c05be9bd314f0e1aff0.exe	80
PID 2700 wrote to memory of 2844	2700	89961de645afe5c55dc9eeeb1394cc92d987a63b52820c05be9bd314f0e1aff0.exe	80
PID 2844 wrote to memory of 4952	2844	89961de645afe5c55dc9eeeb1394cc92d987a63b52820c05be9bd314f0e1aff0.tmp	81
PID 2844 wrote to memory of 4952	2844	89961de645afe5c55dc9eeeb1394cc92d987a63b52820c05be9bd314f0e1aff0.tmp	81
PID 2844 wrote to memory of 4952	2844	89961de645afe5c55dc9eeeb1394cc92d987a63b52820c05be9bd314f0e1aff0.tmp	81
PID 4952 wrote to memory of 2156	4952	OitFiles450.exe	82
PID 4952 wrote to memory of 2156	4952	OitFiles450.exe	82
PID 4952 wrote to memory of 2156	4952	OitFiles450.exe	82
PID 4952 wrote to memory of 4812	4952	OitFiles450.exe	91
PID 4952 wrote to memory of 4812	4952	OitFiles450.exe	91
PID 4952 wrote to memory of 4812	4952	OitFiles450.exe	91
PID 4812 wrote to memory of 4032	4812	cmd.exe	93
PID 4812 wrote to memory of 4032	4812	cmd.exe	93
PID 4812 wrote to memory of 4032	4812	cmd.exe	93

C:\Users\Admin\AppData\Local\Temp\89961de645afe5c55dc9eeeb1394cc92d987a63b52820c05be9bd314f0e1aff0.exe
"C:\Users\Admin\AppData\Local\Temp\89961de645afe5c55dc9eeeb1394cc92d987a63b52820c05be9bd314f0e1aff0.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2700
- C:\Users\Admin\AppData\Local\Temp\is-6QH7G.tmp\89961de645afe5c55dc9eeeb1394cc92d987a63b52820c05be9bd314f0e1aff0.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-6QH7G.tmp\89961de645afe5c55dc9eeeb1394cc92d987a63b52820c05be9bd314f0e1aff0.tmp" /SL5="$A0048,1265392,229888,C:\Users\Admin\AppData\Local\Temp\89961de645afe5c55dc9eeeb1394cc92d987a63b52820c05be9bd314f0e1aff0.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:2844
- - 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:4952
  - - C:\Users\Admin\AppData\Roaming\{1ca2f389-1ab8-11ed-aebb-806e6f6e6963}\eMhdYA.exe
      4⤵
      Executes dropped EXE
      PID:2156
  - - 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:4812
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "OitFiles450.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:4032

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
2.1MB

MD5
5b08f5b7f826c53d7b1e7da4b8284235

SHA1
9560d73000735414effa1b8b4f97a2320300148f

SHA256
d6d285c4f09348d4df0c4feb761ba1336c41ba03e882fe051531240ae72d273e

SHA512
71e6968e79bcbef9e32d992901deb2a5b68c96af2911147b5d43b2948123603093481b973e09044844b1f281983b76cf57caeb8747d82caf7c6d7b9d90fa524e

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

Filesize
2.1MB

MD5
5b08f5b7f826c53d7b1e7da4b8284235

SHA1
9560d73000735414effa1b8b4f97a2320300148f

SHA256
d6d285c4f09348d4df0c4feb761ba1336c41ba03e882fe051531240ae72d273e

SHA512
71e6968e79bcbef9e32d992901deb2a5b68c96af2911147b5d43b2948123603093481b973e09044844b1f281983b76cf57caeb8747d82caf7c6d7b9d90fa524e

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-6QH7G.tmp\89961de645afe5c55dc9eeeb1394cc92d987a63b52820c05be9bd314f0e1aff0.tmp

Filesize
779KB

MD5
70f2afb7b9313b21cd852a33bebe23d8

SHA1
6d17a890977a7434fed0ab6f75f125335af36687

SHA256
3f7c916efbd1fae45d696f00791a93d9ad2adf18b2ee66daddb30a9d431dfe18

SHA512
dd00d319a17ee6eed692aa80426ce5004be98e550fe567c3b5d725d931e258107eb7fe2a2a181ba97b90093674bb50880b78de10ec4e64b75ecde3b303cdc447

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-6QH7G.tmp\89961de645afe5c55dc9eeeb1394cc92d987a63b52820c05be9bd314f0e1aff0.tmp

Filesize
779KB

MD5
70f2afb7b9313b21cd852a33bebe23d8

SHA1
6d17a890977a7434fed0ab6f75f125335af36687

SHA256
3f7c916efbd1fae45d696f00791a93d9ad2adf18b2ee66daddb30a9d431dfe18

SHA512
dd00d319a17ee6eed692aa80426ce5004be98e550fe567c3b5d725d931e258107eb7fe2a2a181ba97b90093674bb50880b78de10ec4e64b75ecde3b303cdc447

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

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
C:\Users\Admin\AppData\Roaming\{1ca2f389-1ab8-11ed-aebb-806e6f6e6963}\eMhdYA.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
C:\Users\Admin\AppData\Roaming\{1ca2f389-1ab8-11ed-aebb-806e6f6e6963}\eMhdYA.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
memory/2700-137-0x0000000000400000-0x000000000043F000-memory.dmp

Filesize
252KB

Download
memory/2700-152-0x0000000000400000-0x000000000043F000-memory.dmp

Filesize
252KB

Download
memory/2700-157-0x0000000000400000-0x000000000043F000-memory.dmp

Filesize
252KB

Download
memory/2700-132-0x0000000000400000-0x000000000043F000-memory.dmp

Filesize
252KB

Download
memory/4952-142-0x0000000000400000-0x0000000001411000-memory.dmp

Filesize
16.1MB

Download
memory/4952-148-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/4952-153-0x0000000000400000-0x0000000001411000-memory.dmp

Filesize
16.1MB

Download
memory/4952-144-0x0000000000400000-0x0000000001411000-memory.dmp

Filesize
16.1MB

Download
memory/4952-143-0x0000000000400000-0x0000000001411000-memory.dmp

Filesize
16.1MB

Download
memory/4952-156-0x0000000000400000-0x0000000001411000-memory.dmp

Filesize
16.1MB

Download

Analysis

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