gcleaner | f077315ae8783ee24b4a74165ce2053be4eec46b470799f5f13d5802f272b685

General

Target

ProgrammerHumor.exe
Size

1.9MB
MD5

e43b4b2d5fc246f04f1652a5cc3a9deb
SHA1

304769d7242447454ec77ab1970aba71748ca822
SHA256

f077315ae8783ee24b4a74165ce2053be4eec46b470799f5f13d5802f272b685
SHA512

f5d4852fd63895cfb8074797e72946bb2df2ba34d8b8aee42f2d0d7ee6a457ccf39b070921e08709ca1efe9b9525a7f80857e869637de858343b689b34f34f99
SSDEEP

49152:ISuX2+C8qu0LIfHCKM5+2aRT3+jdsVtIDsxDYAG5cT:ISe2+C8yLIPCi2ah3+eQeDYXcT

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-1-5-21-2548970870-3691742953-3895070203-1000\Control Panel\International\Geo\Nation	Rec516.exe

Executes dropped EXE 3 IoCs

pid	Process
332	is-HUP4E.tmp
3368	Rec516.exe
1256	C5usfgMGmyD.exe

Loads dropped DLL 1 IoCs

pid	Process
332	is-HUP4E.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)\FLGCover\Rec516\unins000.dat	is-HUP4E.tmp
File created	C:\Program Files (x86)\FLGCover\Rec516\is-QB8N9.tmp	is-HUP4E.tmp
File created	C:\Program Files (x86)\FLGCover\Rec516\is-LRJBQ.tmp	is-HUP4E.tmp
File created	C:\Program Files (x86)\FLGCover\Rec516\is-01ROM.tmp	is-HUP4E.tmp
File created	C:\Program Files (x86)\FLGCover\Rec516\is-JMDOE.tmp	is-HUP4E.tmp
File created	C:\Program Files (x86)\FLGCover\Rec516\is-LVG07.tmp	is-HUP4E.tmp
File created	C:\Program Files (x86)\FLGCover\Rec516\data\is-KENJC.tmp	is-HUP4E.tmp
File opened for modification	C:\Program Files (x86)\FLGCover\Rec516\unins000.dat	is-HUP4E.tmp
File opened for modification	C:\Program Files (x86)\FLGCover\Rec516\Rec516.exe	is-HUP4E.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
3612	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
3368	Rec516.exe
3368	Rec516.exe
3368	Rec516.exe
3368	Rec516.exe
3368	Rec516.exe
3368	Rec516.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3612	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 3132 wrote to memory of 332	3132	ProgrammerHumor.exe	83
PID 3132 wrote to memory of 332	3132	ProgrammerHumor.exe	83
PID 3132 wrote to memory of 332	3132	ProgrammerHumor.exe	83
PID 332 wrote to memory of 3368	332	is-HUP4E.tmp	84
PID 332 wrote to memory of 3368	332	is-HUP4E.tmp	84
PID 332 wrote to memory of 3368	332	is-HUP4E.tmp	84
PID 3368 wrote to memory of 1256	3368	Rec516.exe	88
PID 3368 wrote to memory of 1256	3368	Rec516.exe	88
PID 3368 wrote to memory of 1256	3368	Rec516.exe	88
PID 3368 wrote to memory of 928	3368	Rec516.exe	93
PID 3368 wrote to memory of 928	3368	Rec516.exe	93
PID 3368 wrote to memory of 928	3368	Rec516.exe	93
PID 928 wrote to memory of 3612	928	cmd.exe	95
PID 928 wrote to memory of 3612	928	cmd.exe	95
PID 928 wrote to memory of 3612	928	cmd.exe	95

C:\Users\Admin\AppData\Local\Temp\ProgrammerHumor.exe
"C:\Users\Admin\AppData\Local\Temp\ProgrammerHumor.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:3132
- C:\Users\Admin\AppData\Local\Temp\is-H96V2.tmp\is-HUP4E.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-H96V2.tmp\is-HUP4E.tmp" /SL4 $90176 "C:\Users\Admin\AppData\Local\Temp\ProgrammerHumor.exe" 1789553 51712
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:332
- - C:\Program Files (x86)\FLGCover\Rec516\Rec516.exe
    "C:\Program Files (x86)\FLGCover\Rec516\Rec516.exe"
    3⤵
    - Checks computer location settings
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:3368
  - - C:\Users\Admin\AppData\Roaming\{50f85992-b191-11ed-9147-806e6f6e6963}\C5usfgMGmyD.exe
      4⤵
      Executes dropped EXE
      PID:1256
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "Rec516.exe" /f & erase "C:\Program Files (x86)\FLGCover\Rec516\Rec516.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:928
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "Rec516.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:3612

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)\FLGCover\Rec516\Rec516.exe

Filesize
2.2MB

MD5
8890d83565e5b50bb276e5bf6ccdf0c5

SHA1
26a6cdffa1b3c758fd0f319a72382330996c4fd9

SHA256
b36ccf6988f256a172315cc7387f56178de0bff05c637103d12889ec355b840a

SHA512
a6f44bcfb2f4a77feac4cd74a59284ebdecdd30ae58b97bc9495ada95cc91b39a24a818cf0d80191d18809f9991817e4ecc19d3b1dd6e7eab18738b3135c9db7

Download Submit
C:\Program Files (x86)\FLGCover\Rec516\Rec516.exe

Filesize
2.2MB

MD5
8890d83565e5b50bb276e5bf6ccdf0c5

SHA1
26a6cdffa1b3c758fd0f319a72382330996c4fd9

SHA256
b36ccf6988f256a172315cc7387f56178de0bff05c637103d12889ec355b840a

SHA512
a6f44bcfb2f4a77feac4cd74a59284ebdecdd30ae58b97bc9495ada95cc91b39a24a818cf0d80191d18809f9991817e4ecc19d3b1dd6e7eab18738b3135c9db7

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\IE\7H82VOZS\dll[1].htm

Filesize
1B

MD5
cfcd208495d565ef66e7dff9f98764da

SHA1
b6589fc6ab0dc82cf12099d1c2d40ab994e8410c

SHA256
5feceb66ffc86f38d952786c6d696c79c2dbc239dd4e91b46729d73a27fb57e9

SHA512
31bca02094eb78126a517b206a88c73cfa9ec6f704c7030d18212cace820f025f00bf0ea68dbf3f3a5436ca63b53bf7bf80ad8d5de7d8359d0b7fed9dbc3ab99

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-9R3L8.tmp\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-H96V2.tmp\is-HUP4E.tmp

Filesize
643KB

MD5
72d3c1e3acb10e576f02c9b635ee58d8

SHA1
00345a3076ade8192bf3298e16d5fdf754daf793

SHA256
4ccf3c1393e21c1fb0e525da285d125e9773bb1d554d830b3219f894e3b59fd7

SHA512
30a5c390dbee02ae57e520c118a53e7cfb89bda244c01b519e5fa4ca8b5b2d88c92b99141a720bfc24acc946170e087b2e8ad01f76c83931b1d039dce1f3133a

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-H96V2.tmp\is-HUP4E.tmp

Filesize
643KB

MD5
72d3c1e3acb10e576f02c9b635ee58d8

SHA1
00345a3076ade8192bf3298e16d5fdf754daf793

SHA256
4ccf3c1393e21c1fb0e525da285d125e9773bb1d554d830b3219f894e3b59fd7

SHA512
30a5c390dbee02ae57e520c118a53e7cfb89bda244c01b519e5fa4ca8b5b2d88c92b99141a720bfc24acc946170e087b2e8ad01f76c83931b1d039dce1f3133a

Download Submit
C:\Users\Admin\AppData\Roaming\{50f85992-b191-11ed-9147-806e6f6e6963}\C5usfgMGmyD.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
C:\Users\Admin\AppData\Roaming\{50f85992-b191-11ed-9147-806e6f6e6963}\C5usfgMGmyD.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
memory/332-147-0x0000000002340000-0x0000000002341000-memory.dmp

Filesize
4KB

Download
memory/332-179-0x0000000000400000-0x00000000004CF000-memory.dmp

Filesize
828KB

Download
memory/332-197-0x0000000000400000-0x00000000004CF000-memory.dmp

Filesize
828KB

Download
memory/3132-178-0x0000000000400000-0x0000000000413000-memory.dmp

Filesize
76KB

Download
memory/3132-133-0x0000000000400000-0x0000000000413000-memory.dmp

Filesize
76KB

Download
memory/3132-198-0x0000000000400000-0x0000000000413000-memory.dmp

Filesize
76KB

Download
memory/3368-165-0x0000000000400000-0x000000000142D000-memory.dmp

Filesize
16.2MB

Download
memory/3368-173-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/3368-181-0x0000000000400000-0x000000000142D000-memory.dmp

Filesize
16.2MB

Download
memory/3368-196-0x0000000000400000-0x000000000142D000-memory.dmp

Filesize
16.2MB

Download

Analysis

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