4f675ed468c929047177a9f6aa1b48ef72a407b55638b507c88c0776c880747b

Analysis

max time kernel
150s
max time network
119s
platform
windows7_x64
resource
win7-20231129-en
resource tags

arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
submitted
31/05/2024, 21:35

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General

Target

4f675ed468c929047177a9f6aa1b48ef72a407b55638b507c88c0776c880747b.exe
Size

636KB
MD5

5a4624a300095f24a92f98bcf5592053
SHA1

244e911a5e463d79932d3396af38b73af90e55ec
SHA256

4f675ed468c929047177a9f6aa1b48ef72a407b55638b507c88c0776c880747b
SHA512

406ac3714704865375ddea04f087f6c17609589e6a0e2feb659ebab53fecbe5ec717737a56efbbf2faf8a7191473d3614bc0a6a5f5fd164158af72b8380d1ef0
SSDEEP

6144:UsLqdufVUNDalaB5Ra5KjbaFmsb/IbPU2K5XYjP3slUvZZIU5OS:PFUNDalaB5M5KjGwUk0JAOS

Score

10^/10

evasion persistence

Malware Config

Signatures

Modifies visiblity of hidden/system files in Explorer 2 TTPs 2 IoCs

evasion

Hidden Files and Directories

T1564.001

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\USER\S-1-5-21-3627615824-4061627003-3019543961-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	explorer.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3627615824-4061627003-3019543961-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	svchost.exe

Executes dropped EXE 6 IoCs

pid	Process
2736	4f675ed468c929047177a9f6aa1b48ef72a407b55638b507c88c0776c880747b.exe
1712	icsys.icn.exe
2156	explorer.exe
2276	spoolsv.exe
2700	svchost.exe
2712	spoolsv.exe

Loads dropped DLL 6 IoCs

pid	Process
1044	4f675ed468c929047177a9f6aa1b48ef72a407b55638b507c88c0776c880747b.exe
1044	4f675ed468c929047177a9f6aa1b48ef72a407b55638b507c88c0776c880747b.exe
1712	icsys.icn.exe
2156	explorer.exe
2276	spoolsv.exe
2700	svchost.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\RunOnce\Explorer = "c:\\windows\\resources\\themes\\explorer.exe RO"	explorer.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\RunOnce\Svchost = "c:\\windows\\resources\\svchost.exe RO"	explorer.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\RunOnce\Explorer = "c:\\windows\\resources\\themes\\explorer.exe RO"	svchost.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\RunOnce\Svchost = "c:\\windows\\resources\\svchost.exe RO"	svchost.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\explorer.exe	explorer.exe
File opened for modification	C:\Windows\SysWOW64\explorer.exe	svchost.exe

Drops file in Windows directory 5 IoCs

description	ioc	Process
File opened for modification	C:\Windows\Resources\Themes\icsys.icn.exe	4f675ed468c929047177a9f6aa1b48ef72a407b55638b507c88c0776c880747b.exe
File opened for modification	\??\c:\windows\resources\themes\explorer.exe	icsys.icn.exe
File opened for modification	\??\c:\windows\resources\spoolsv.exe	explorer.exe
File opened for modification	\??\c:\windows\resources\svchost.exe	spoolsv.exe
File opened for modification	C:\Windows\Resources\tjud.exe	explorer.exe

Creates scheduled task(s) 1 TTPs 3 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task/Job

T1053

pid	Process
2480	schtasks.exe
340	schtasks.exe
876	schtasks.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
1044	4f675ed468c929047177a9f6aa1b48ef72a407b55638b507c88c0776c880747b.exe
1044	4f675ed468c929047177a9f6aa1b48ef72a407b55638b507c88c0776c880747b.exe
1044	4f675ed468c929047177a9f6aa1b48ef72a407b55638b507c88c0776c880747b.exe
1044	4f675ed468c929047177a9f6aa1b48ef72a407b55638b507c88c0776c880747b.exe
1044	4f675ed468c929047177a9f6aa1b48ef72a407b55638b507c88c0776c880747b.exe
1044	4f675ed468c929047177a9f6aa1b48ef72a407b55638b507c88c0776c880747b.exe
1044	4f675ed468c929047177a9f6aa1b48ef72a407b55638b507c88c0776c880747b.exe
1044	4f675ed468c929047177a9f6aa1b48ef72a407b55638b507c88c0776c880747b.exe
1044	4f675ed468c929047177a9f6aa1b48ef72a407b55638b507c88c0776c880747b.exe
1044	4f675ed468c929047177a9f6aa1b48ef72a407b55638b507c88c0776c880747b.exe
1044	4f675ed468c929047177a9f6aa1b48ef72a407b55638b507c88c0776c880747b.exe
1044	4f675ed468c929047177a9f6aa1b48ef72a407b55638b507c88c0776c880747b.exe
1044	4f675ed468c929047177a9f6aa1b48ef72a407b55638b507c88c0776c880747b.exe
1044	4f675ed468c929047177a9f6aa1b48ef72a407b55638b507c88c0776c880747b.exe
1044	4f675ed468c929047177a9f6aa1b48ef72a407b55638b507c88c0776c880747b.exe
1044	4f675ed468c929047177a9f6aa1b48ef72a407b55638b507c88c0776c880747b.exe
1712	icsys.icn.exe
1712	icsys.icn.exe
1712	icsys.icn.exe
1712	icsys.icn.exe
1712	icsys.icn.exe
1712	icsys.icn.exe
1712	icsys.icn.exe
1712	icsys.icn.exe
1712	icsys.icn.exe
1712	icsys.icn.exe
1712	icsys.icn.exe
1712	icsys.icn.exe
1712	icsys.icn.exe
1712	icsys.icn.exe
1712	icsys.icn.exe
1712	icsys.icn.exe
1712	icsys.icn.exe
2156	explorer.exe
2156	explorer.exe
2156	explorer.exe
2156	explorer.exe
2156	explorer.exe
2156	explorer.exe
2156	explorer.exe
2156	explorer.exe
2156	explorer.exe
2156	explorer.exe
2156	explorer.exe
2156	explorer.exe
2156	explorer.exe
2156	explorer.exe
2156	explorer.exe
2156	explorer.exe
2700	svchost.exe
2700	svchost.exe
2700	svchost.exe
2700	svchost.exe
2700	svchost.exe
2700	svchost.exe
2700	svchost.exe
2700	svchost.exe
2700	svchost.exe
2700	svchost.exe
2700	svchost.exe
2700	svchost.exe
2700	svchost.exe
2700	svchost.exe
2700	svchost.exe

Suspicious behavior: GetForegroundWindowSpam 2 IoCs

pid	Process
2156	explorer.exe
2700	svchost.exe

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
1044	4f675ed468c929047177a9f6aa1b48ef72a407b55638b507c88c0776c880747b.exe
1044	4f675ed468c929047177a9f6aa1b48ef72a407b55638b507c88c0776c880747b.exe
1712	icsys.icn.exe
1712	icsys.icn.exe
2156	explorer.exe
2156	explorer.exe
2276	spoolsv.exe
2276	spoolsv.exe
2700	svchost.exe
2700	svchost.exe
2712	spoolsv.exe
2712	spoolsv.exe

Suspicious use of WriteProcessMemory 40 IoCs

description	pid	Process	procid_target
PID 1044 wrote to memory of 2736	1044	4f675ed468c929047177a9f6aa1b48ef72a407b55638b507c88c0776c880747b.exe	28
PID 1044 wrote to memory of 2736	1044	4f675ed468c929047177a9f6aa1b48ef72a407b55638b507c88c0776c880747b.exe	28
PID 1044 wrote to memory of 2736	1044	4f675ed468c929047177a9f6aa1b48ef72a407b55638b507c88c0776c880747b.exe	28
PID 1044 wrote to memory of 2736	1044	4f675ed468c929047177a9f6aa1b48ef72a407b55638b507c88c0776c880747b.exe	28
PID 1044 wrote to memory of 1712	1044	4f675ed468c929047177a9f6aa1b48ef72a407b55638b507c88c0776c880747b.exe	29
PID 1044 wrote to memory of 1712	1044	4f675ed468c929047177a9f6aa1b48ef72a407b55638b507c88c0776c880747b.exe	29
PID 1044 wrote to memory of 1712	1044	4f675ed468c929047177a9f6aa1b48ef72a407b55638b507c88c0776c880747b.exe	29
PID 1044 wrote to memory of 1712	1044	4f675ed468c929047177a9f6aa1b48ef72a407b55638b507c88c0776c880747b.exe	29
PID 1712 wrote to memory of 2156	1712	icsys.icn.exe	30
PID 1712 wrote to memory of 2156	1712	icsys.icn.exe	30
PID 1712 wrote to memory of 2156	1712	icsys.icn.exe	30
PID 1712 wrote to memory of 2156	1712	icsys.icn.exe	30
PID 2156 wrote to memory of 2276	2156	explorer.exe	31
PID 2156 wrote to memory of 2276	2156	explorer.exe	31
PID 2156 wrote to memory of 2276	2156	explorer.exe	31
PID 2156 wrote to memory of 2276	2156	explorer.exe	31
PID 2276 wrote to memory of 2700	2276	spoolsv.exe	32
PID 2276 wrote to memory of 2700	2276	spoolsv.exe	32
PID 2276 wrote to memory of 2700	2276	spoolsv.exe	32
PID 2276 wrote to memory of 2700	2276	spoolsv.exe	32
PID 2700 wrote to memory of 2712	2700	svchost.exe	33
PID 2700 wrote to memory of 2712	2700	svchost.exe	33
PID 2700 wrote to memory of 2712	2700	svchost.exe	33
PID 2700 wrote to memory of 2712	2700	svchost.exe	33
PID 2156 wrote to memory of 2492	2156	explorer.exe	34
PID 2156 wrote to memory of 2492	2156	explorer.exe	34
PID 2156 wrote to memory of 2492	2156	explorer.exe	34
PID 2156 wrote to memory of 2492	2156	explorer.exe	34
PID 2700 wrote to memory of 2480	2700	svchost.exe	35
PID 2700 wrote to memory of 2480	2700	svchost.exe	35
PID 2700 wrote to memory of 2480	2700	svchost.exe	35
PID 2700 wrote to memory of 2480	2700	svchost.exe	35
PID 2700 wrote to memory of 340	2700	svchost.exe	40
PID 2700 wrote to memory of 340	2700	svchost.exe	40
PID 2700 wrote to memory of 340	2700	svchost.exe	40
PID 2700 wrote to memory of 340	2700	svchost.exe	40
PID 2700 wrote to memory of 876	2700	svchost.exe	42
PID 2700 wrote to memory of 876	2700	svchost.exe	42
PID 2700 wrote to memory of 876	2700	svchost.exe	42
PID 2700 wrote to memory of 876	2700	svchost.exe	42

C:\Users\Admin\AppData\Local\Temp\4f675ed468c929047177a9f6aa1b48ef72a407b55638b507c88c0776c880747b.exe
"C:\Users\Admin\AppData\Local\Temp\4f675ed468c929047177a9f6aa1b48ef72a407b55638b507c88c0776c880747b.exe"
1⤵
- Loads dropped DLL
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1044
- \??\c:\users\admin\appdata\local\temp\4f675ed468c929047177a9f6aa1b48ef72a407b55638b507c88c0776c880747b.exe
  c:\users\admin\appdata\local\temp\4f675ed468c929047177a9f6aa1b48ef72a407b55638b507c88c0776c880747b.exe
  2⤵
  - Executes dropped EXE
  PID:2736
- C:\Windows\Resources\Themes\icsys.icn.exe
  C:\Windows\Resources\Themes\icsys.icn.exe
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Windows directory
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1712
- - \??\c:\windows\resources\themes\explorer.exe
    c:\windows\resources\themes\explorer.exe
    3⤵
    - Modifies visiblity of hidden/system files in Explorer
    - Executes dropped EXE
    - Loads dropped DLL
    - Adds Run key to start application
    - Drops file in System32 directory
    - Drops file in Windows directory
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: GetForegroundWindowSpam
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:2156
  - - \??\c:\windows\resources\spoolsv.exe
      c:\windows\resources\spoolsv.exe SE
      4⤵
      Executes dropped EXE
      Loads dropped DLL
      Drops file in Windows directory
      Suspicious use of SetWindowsHookEx
      Suspicious use of WriteProcessMemory
      PID:2276
    - - \??\c:\windows\resources\svchost.exe
        
        c:\windows\resources\svchost.exe
        5⤵
        Modifies visiblity of hidden/system files in Explorer
        Executes dropped EXE
        Loads dropped DLL
        Adds Run key to start application
        Drops file in System32 directory
        Suspicious behavior: EnumeratesProcesses
        Suspicious behavior: GetForegroundWindowSpam
        Suspicious use of SetWindowsHookEx
        Suspicious use of WriteProcessMemory
        
        PID:2700
      - \??\c:\windows\resources\spoolsv.exe
        
        c:\windows\resources\spoolsv.exe PR
        6⤵
        Executes dropped EXE
        Suspicious use of SetWindowsHookEx
        
        PID:2712
      - C:\Windows\SysWOW64\schtasks.exe
        
        schtasks /create /tn "svchost" /tr "c:\windows\resources\svchost.exe" /sc daily /st 21:37 /f
        6⤵
        Creates scheduled task(s)
        
        PID:2480
      - C:\Windows\SysWOW64\schtasks.exe
        
        schtasks /create /tn "svchost" /tr "c:\windows\resources\svchost.exe" /sc daily /st 21:38 /f
        6⤵
        Creates scheduled task(s)
        
        PID:340
      - C:\Windows\SysWOW64\schtasks.exe
        
        schtasks /create /tn "svchost" /tr "c:\windows\resources\svchost.exe" /sc daily /st 21:39 /f
        6⤵
        Creates scheduled task(s)
        
        PID:876
  - - C:\Windows\Explorer.exe
      C:\Windows\Explorer.exe
      4⤵
      PID:2492

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Defense Evasion

Hide Artifacts

T1564

Hidden Files and Directories

T1564.001

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Windows\Resources\Themes\explorer.exe

Filesize
135KB

MD5
c83a84ae80885c91a93ebbb247e088b8

SHA1
91e0ab9bc25dcb0e82b9b69720e552f003a7e570

SHA256
7270a48e4d2a2b422ca30b8037a73e6a034064d0e94018bb6cda3057bf987ad7

SHA512
edbad7b96c5970ce54d6ca892e2ff89a83e629fb628c934461bc63b10de50cb150017628256ddea2d8eee4f2e7407263c41aee2f7d3a8591171b04a68070da99

Download Submit
\Users\Admin\AppData\Local\Temp\4f675ed468c929047177a9f6aa1b48ef72a407b55638b507c88c0776c880747b.exe

Filesize
501KB

MD5
92e18c9f1e6c9f4ad8f03c78f6437942

SHA1
40b8ec37f3a192074df7a68ce19ee1c3549a8e60

SHA256
e77d0af823e37c326222ad804b56da70c3dcb1fcf469dc4dc782a592ef4f6e0b

SHA512
ffef00b80c5cb99dc25e2ba3ab2935fd0fb380abf32d742b69090ca4539477e96bf408bc5477143233b8760b92119684f859106ed1ce860bb32b37cebe818df1

Download Submit
\Windows\Resources\Themes\icsys.icn.exe

Filesize
135KB

MD5
59dc5e9d9e1f40eb87bda1eb09826327

SHA1
dfa6de35475afaa05de5efdc9251a169d3b1c39e

SHA256
9aacf57aa2ce957c8a613ff6c606f354d2b46ce35c1e0f1a9068fc32eb76ef4d

SHA512
1cf784c9e3d58b3be59e501918d5e3cbcf18200804e8cd834db23f8131f0840928984e89243ce110b9b47f4564b1a23f8ffb9baefc4f64f0dff1e3487b7f404f

Download Submit
\Windows\Resources\spoolsv.exe

Filesize
135KB

MD5
8a5910c440c7b051ef524c68f9e107d2

SHA1
fd0db5fbdca35dd277b9fa6c148fc124971a8875

SHA256
f5c525a947c413ae3dff0231e2d702ee1a853297704bed4bb05c5f49bffc614d

SHA512
15a8c07a29e0eaa950abe8fdd6134548bc9ce377bcc76c7da8c4b5c8e563e8d6b07d3d119a3324ec145f951b7d39be1bbab60c922bfd085f1fdebcb18f28f80e

Download Submit
\Windows\Resources\svchost.exe

Filesize
135KB

MD5
44c88f92706d4c4713623f460213ba2e

SHA1
5e8d1d6ebc86b0fdaffb487f10f42ae8a3502e62

SHA256
7a55ef6eff7d3cf454ae3f69b00aed26ecb780052a484f0133d4102781ef4d30

SHA512
8936ff39b1194d7af8fb847705e48c576614ac849f244b1ea159b1e76c417b794746bf98809a956e8680b1cca29fd98144b5fbd5cc0e27f1de6030222444f24a

Download Submit
memory/1044-0-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1044-59-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1712-58-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1712-22-0x0000000000320000-0x000000000033F000-memory.dmp

Filesize
124KB

Download
memory/2156-34-0x0000000000330000-0x000000000034F000-memory.dmp

Filesize
124KB

Download
memory/2276-57-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2700-51-0x0000000000320000-0x000000000033F000-memory.dmp

Filesize
124KB

Download
memory/2700-47-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2712-56-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download