cf89b31ff72eb94c6ba24a05cf493e19e2b9419158fde8fb3bf1485a1012ea12

Analysis

max time kernel
120s
max time network
17s
platform
windows7_x64
resource
win7-20240704-en
resource tags

arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-x64system
submitted
20-09-2024 23:11

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General

Target

cf89b31ff72eb94c6ba24a05cf493e19e2b9419158fde8fb3bf1485a1012ea12N.exe
Size

135KB
MD5

aacf18b8d8a225aee92342e4639c3e40
SHA1

882ae2e6cb61d925cf6b9cecd767ce6e4e30409d
SHA256

cf89b31ff72eb94c6ba24a05cf493e19e2b9419158fde8fb3bf1485a1012ea12
SHA512

71faf74fffe6d6feca7ea532df586239ec942e9744c87b0435aa6d5814a684be4e171673016feaa8d4bdf810f139f1f8a3a2678c5f87f68ef35a7067e178ae92
SSDEEP

1536:UfsEqouTRcG/Mzvgf7xEuvnXNTRdUzwTekUOisZ1yDDajtXbViEEEEEEEEEEEEEX:UVqoCl/YgjxEufVU0TbTyDDalBH

Score

10^/10

discovery 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-1-5-21-3434294380-2554721341-1919518612-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	explorer.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3434294380-2554721341-1919518612-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	svchost.exe

Executes dropped EXE 4 IoCs

pid	Process
2300	explorer.exe
2616	spoolsv.exe
2544	svchost.exe
2700	spoolsv.exe

Loads dropped DLL 4 IoCs

pid	Process
2180	cf89b31ff72eb94c6ba24a05cf493e19e2b9419158fde8fb3bf1485a1012ea12N.exe
2300	explorer.exe
2616	spoolsv.exe
2544	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 4 IoCs

description	ioc	Process
File opened for modification	\??\c:\windows\resources\themes\explorer.exe	cf89b31ff72eb94c6ba24a05cf493e19e2b9419158fde8fb3bf1485a1012ea12N.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

System Location Discovery: System Language Discovery 1 TTPs 7 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cf89b31ff72eb94c6ba24a05cf493e19e2b9419158fde8fb3bf1485a1012ea12N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	explorer.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	spoolsv.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	spoolsv.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
2416	schtasks.exe
1720	schtasks.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
2180	cf89b31ff72eb94c6ba24a05cf493e19e2b9419158fde8fb3bf1485a1012ea12N.exe
2180	cf89b31ff72eb94c6ba24a05cf493e19e2b9419158fde8fb3bf1485a1012ea12N.exe
2180	cf89b31ff72eb94c6ba24a05cf493e19e2b9419158fde8fb3bf1485a1012ea12N.exe
2180	cf89b31ff72eb94c6ba24a05cf493e19e2b9419158fde8fb3bf1485a1012ea12N.exe
2180	cf89b31ff72eb94c6ba24a05cf493e19e2b9419158fde8fb3bf1485a1012ea12N.exe
2180	cf89b31ff72eb94c6ba24a05cf493e19e2b9419158fde8fb3bf1485a1012ea12N.exe
2180	cf89b31ff72eb94c6ba24a05cf493e19e2b9419158fde8fb3bf1485a1012ea12N.exe
2180	cf89b31ff72eb94c6ba24a05cf493e19e2b9419158fde8fb3bf1485a1012ea12N.exe
2180	cf89b31ff72eb94c6ba24a05cf493e19e2b9419158fde8fb3bf1485a1012ea12N.exe
2180	cf89b31ff72eb94c6ba24a05cf493e19e2b9419158fde8fb3bf1485a1012ea12N.exe
2180	cf89b31ff72eb94c6ba24a05cf493e19e2b9419158fde8fb3bf1485a1012ea12N.exe
2180	cf89b31ff72eb94c6ba24a05cf493e19e2b9419158fde8fb3bf1485a1012ea12N.exe
2180	cf89b31ff72eb94c6ba24a05cf493e19e2b9419158fde8fb3bf1485a1012ea12N.exe
2180	cf89b31ff72eb94c6ba24a05cf493e19e2b9419158fde8fb3bf1485a1012ea12N.exe
2180	cf89b31ff72eb94c6ba24a05cf493e19e2b9419158fde8fb3bf1485a1012ea12N.exe
2180	cf89b31ff72eb94c6ba24a05cf493e19e2b9419158fde8fb3bf1485a1012ea12N.exe
2180	cf89b31ff72eb94c6ba24a05cf493e19e2b9419158fde8fb3bf1485a1012ea12N.exe
2300	explorer.exe
2300	explorer.exe
2300	explorer.exe
2300	explorer.exe
2300	explorer.exe
2300	explorer.exe
2300	explorer.exe
2300	explorer.exe
2300	explorer.exe
2300	explorer.exe
2300	explorer.exe
2300	explorer.exe
2300	explorer.exe
2300	explorer.exe
2300	explorer.exe
2300	explorer.exe
2544	svchost.exe
2544	svchost.exe
2544	svchost.exe
2544	svchost.exe
2544	svchost.exe
2544	svchost.exe
2544	svchost.exe
2544	svchost.exe
2544	svchost.exe
2544	svchost.exe
2544	svchost.exe
2544	svchost.exe
2544	svchost.exe
2544	svchost.exe
2544	svchost.exe
2544	svchost.exe
2300	explorer.exe
2300	explorer.exe
2300	explorer.exe
2300	explorer.exe
2544	svchost.exe
2544	svchost.exe
2300	explorer.exe
2544	svchost.exe
2300	explorer.exe
2544	svchost.exe
2300	explorer.exe
2544	svchost.exe
2300	explorer.exe
2544	svchost.exe
2300	explorer.exe

Suspicious behavior: GetForegroundWindowSpam 2 IoCs

pid	Process
2300	explorer.exe
2544	svchost.exe

Suspicious use of SetWindowsHookEx 10 IoCs

pid	Process
2180	cf89b31ff72eb94c6ba24a05cf493e19e2b9419158fde8fb3bf1485a1012ea12N.exe
2180	cf89b31ff72eb94c6ba24a05cf493e19e2b9419158fde8fb3bf1485a1012ea12N.exe
2300	explorer.exe
2300	explorer.exe
2616	spoolsv.exe
2616	spoolsv.exe
2544	svchost.exe
2544	svchost.exe
2700	spoolsv.exe
2700	spoolsv.exe

Suspicious use of WriteProcessMemory 28 IoCs

description	pid	Process	procid_target
PID 2180 wrote to memory of 2300	2180	cf89b31ff72eb94c6ba24a05cf493e19e2b9419158fde8fb3bf1485a1012ea12N.exe	30
PID 2180 wrote to memory of 2300	2180	cf89b31ff72eb94c6ba24a05cf493e19e2b9419158fde8fb3bf1485a1012ea12N.exe	30
PID 2180 wrote to memory of 2300	2180	cf89b31ff72eb94c6ba24a05cf493e19e2b9419158fde8fb3bf1485a1012ea12N.exe	30
PID 2180 wrote to memory of 2300	2180	cf89b31ff72eb94c6ba24a05cf493e19e2b9419158fde8fb3bf1485a1012ea12N.exe	30
PID 2300 wrote to memory of 2616	2300	explorer.exe	31
PID 2300 wrote to memory of 2616	2300	explorer.exe	31
PID 2300 wrote to memory of 2616	2300	explorer.exe	31
PID 2300 wrote to memory of 2616	2300	explorer.exe	31
PID 2616 wrote to memory of 2544	2616	spoolsv.exe	32
PID 2616 wrote to memory of 2544	2616	spoolsv.exe	32
PID 2616 wrote to memory of 2544	2616	spoolsv.exe	32
PID 2616 wrote to memory of 2544	2616	spoolsv.exe	32
PID 2544 wrote to memory of 2700	2544	svchost.exe	33
PID 2544 wrote to memory of 2700	2544	svchost.exe	33
PID 2544 wrote to memory of 2700	2544	svchost.exe	33
PID 2544 wrote to memory of 2700	2544	svchost.exe	33
PID 2300 wrote to memory of 2556	2300	explorer.exe	34
PID 2300 wrote to memory of 2556	2300	explorer.exe	34
PID 2300 wrote to memory of 2556	2300	explorer.exe	34
PID 2300 wrote to memory of 2556	2300	explorer.exe	34
PID 2544 wrote to memory of 2416	2544	svchost.exe	35
PID 2544 wrote to memory of 2416	2544	svchost.exe	35
PID 2544 wrote to memory of 2416	2544	svchost.exe	35
PID 2544 wrote to memory of 2416	2544	svchost.exe	35
PID 2544 wrote to memory of 1720	2544	svchost.exe	38
PID 2544 wrote to memory of 1720	2544	svchost.exe	38
PID 2544 wrote to memory of 1720	2544	svchost.exe	38
PID 2544 wrote to memory of 1720	2544	svchost.exe	38

C:\Users\Admin\AppData\Local\Temp\cf89b31ff72eb94c6ba24a05cf493e19e2b9419158fde8fb3bf1485a1012ea12N.exe
"C:\Users\Admin\AppData\Local\Temp\cf89b31ff72eb94c6ba24a05cf493e19e2b9419158fde8fb3bf1485a1012ea12N.exe"
1⤵
- Loads dropped DLL
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2180
- \??\c:\windows\resources\themes\explorer.exe
  c:\windows\resources\themes\explorer.exe
  2⤵
  - 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
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: GetForegroundWindowSpam
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2300
- - \??\c:\windows\resources\spoolsv.exe
    c:\windows\resources\spoolsv.exe SE
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:2616
  - - \??\c:\windows\resources\svchost.exe
      c:\windows\resources\svchost.exe
      4⤵
      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
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious behavior: GetForegroundWindowSpam
      Suspicious use of SetWindowsHookEx
      Suspicious use of WriteProcessMemory
      PID:2544
    - - \??\c:\windows\resources\spoolsv.exe
        
        c:\windows\resources\spoolsv.exe PR
        5⤵
        Executes dropped EXE
        System Location Discovery: System Language Discovery
        Suspicious use of SetWindowsHookEx
        
        PID:2700
    - - C:\Windows\SysWOW64\schtasks.exe
        
        schtasks /create /tn "svchost" /tr "c:\windows\resources\svchost.exe" /sc daily /st 23:13 /f
        5⤵
        System Location Discovery: System Language Discovery
        Scheduled Task/Job: Scheduled Task
        
        PID:2416
    - - C:\Windows\SysWOW64\schtasks.exe
        
        schtasks /create /tn "svchost" /tr "c:\windows\resources\svchost.exe" /sc daily /st 23:14 /f
        5⤵
        System Location Discovery: System Language Discovery
        Scheduled Task/Job: Scheduled Task
        
        PID:1720
- - C:\Windows\Explorer.exe
    C:\Windows\Explorer.exe
    3⤵
    PID:2556

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Hide Artifacts

T1564

Hidden Files and Directories

T1564.001

Modify Registry

T1112

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

\Windows\Resources\Themes\explorer.exe

Filesize
135KB

MD5
2da2642cf44e4116f0e04d952e6d58ec

SHA1
aa374d9cdbcbe7b7b844d62382e8ece5e86005df

SHA256
eb28b02e7e28663aab0e6a4f34ed553e837acc92b15bd0d55fc903718dd3c72b

SHA512
40fc50ddfa4ff15f8870a588d0c472915e9cf2d6d831acdda63e0cbf6a03a170306bf42b4e23ff85b71d8ca355cc45744a7ac733a284315d843f575a77b7c6f7

Download Submit
\Windows\Resources\spoolsv.exe

Filesize
135KB

MD5
e39196a1ebe2b4b10a6fea9b3170a73b

SHA1
50c4fd02134bb42cf01ebb7e1f19e306bbce4334

SHA256
a7890a08263026c1ca3338e518034076f888aa11542135027b6d6166c76f6c90

SHA512
dd9d81a644127bc65f000fe4d052231b5286354bedc5834dd649f7d379452d84a7532495c3bd22c1727e982d57cc336469d0ef4adb2444dd6977eb170e06bd4d

Download Submit
\Windows\Resources\svchost.exe

Filesize
135KB

MD5
d773c025358184b31d8afe849e4912e3

SHA1
46d59d153fc8572138ae51cdd5280f7a012da5e2

SHA256
331d702cca2717a3b0d75ad96198c4d2886faf42efee36ffdb1e8c55a60d134d

SHA512
a20b69b53b661da1ac296e803251be479c3645e0b6694958bdb08fcc67d5e203baedfabb17eb57fe7710ec7f14315175ef3100a41b3984e49ea96c49c04cd107

Download Submit
memory/2180-8-0x00000000005E0000-0x00000000005FF000-memory.dmp

Filesize
124KB

Download
memory/2180-44-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2180-0-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2300-45-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2544-37-0x0000000000270000-0x000000000028F000-memory.dmp

Filesize
124KB

Download
memory/2544-47-0x0000000000270000-0x000000000028F000-memory.dmp

Filesize
124KB

Download
memory/2544-46-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2616-23-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2616-43-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2700-42-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download