b5b4eeb48afcdafa22ee0f22a09407c49d0b36b4ec3787e7a5089a0297e7ccdd

Analysis

max time kernel
120s
max time network
20s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
21-09-2024 03:26

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General

Target

b5b4eeb48afcdafa22ee0f22a09407c49d0b36b4ec3787e7a5089a0297e7ccddN.exe
Size

135KB
MD5

a014cfc4caa0ea34943e3f257e4d84b0
SHA1

c08640c3f3ba0f4feae91edef3225807578f4aca
SHA256

b5b4eeb48afcdafa22ee0f22a09407c49d0b36b4ec3787e7a5089a0297e7ccdd
SHA512

8102ef018133ffbef1e033eef87e4887cdd619c81296ef7773f5ccaf742c10581f87ec626f0a9f7ada7331d62afae6bdd88acfba4f2bac2bc29b578b0b94bf90
SSDEEP

1536:UfsEqouTRcG/Mzvgf7xEuvnXNTRdUzwTekUOisZ1yDDajtXbVdS2:UVqoCl/YgjxEufVU0TbTyDDalrS2

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-1-5-21-457978338-2990298471-2379561640-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	explorer.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-457978338-2990298471-2379561640-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	svchost.exe

Executes dropped EXE 4 IoCs

pid	Process
2364	explorer.exe
2200	spoolsv.exe
2824	svchost.exe
2976	spoolsv.exe

Loads dropped DLL 4 IoCs

pid	Process
2252	b5b4eeb48afcdafa22ee0f22a09407c49d0b36b4ec3787e7a5089a0297e7ccddN.exe
2364	explorer.exe
2200	spoolsv.exe
2824	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\Svchost = "c:\\windows\\resources\\svchost.exe RO"	svchost.exe
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

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\svchost.exe	spoolsv.exe
File opened for modification	C:\Windows\Resources\tjud.exe	explorer.exe
File opened for modification	\??\c:\windows\resources\themes\explorer.exe	b5b4eeb48afcdafa22ee0f22a09407c49d0b36b4ec3787e7a5089a0297e7ccddN.exe
File opened for modification	\??\c:\windows\resources\spoolsv.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	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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	b5b4eeb48afcdafa22ee0f22a09407c49d0b36b4ec3787e7a5089a0297e7ccddN.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	explorer.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
2600	schtasks.exe
940	schtasks.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
2252	b5b4eeb48afcdafa22ee0f22a09407c49d0b36b4ec3787e7a5089a0297e7ccddN.exe
2252	b5b4eeb48afcdafa22ee0f22a09407c49d0b36b4ec3787e7a5089a0297e7ccddN.exe
2252	b5b4eeb48afcdafa22ee0f22a09407c49d0b36b4ec3787e7a5089a0297e7ccddN.exe
2252	b5b4eeb48afcdafa22ee0f22a09407c49d0b36b4ec3787e7a5089a0297e7ccddN.exe
2252	b5b4eeb48afcdafa22ee0f22a09407c49d0b36b4ec3787e7a5089a0297e7ccddN.exe
2252	b5b4eeb48afcdafa22ee0f22a09407c49d0b36b4ec3787e7a5089a0297e7ccddN.exe
2252	b5b4eeb48afcdafa22ee0f22a09407c49d0b36b4ec3787e7a5089a0297e7ccddN.exe
2252	b5b4eeb48afcdafa22ee0f22a09407c49d0b36b4ec3787e7a5089a0297e7ccddN.exe
2252	b5b4eeb48afcdafa22ee0f22a09407c49d0b36b4ec3787e7a5089a0297e7ccddN.exe
2252	b5b4eeb48afcdafa22ee0f22a09407c49d0b36b4ec3787e7a5089a0297e7ccddN.exe
2252	b5b4eeb48afcdafa22ee0f22a09407c49d0b36b4ec3787e7a5089a0297e7ccddN.exe
2252	b5b4eeb48afcdafa22ee0f22a09407c49d0b36b4ec3787e7a5089a0297e7ccddN.exe
2252	b5b4eeb48afcdafa22ee0f22a09407c49d0b36b4ec3787e7a5089a0297e7ccddN.exe
2252	b5b4eeb48afcdafa22ee0f22a09407c49d0b36b4ec3787e7a5089a0297e7ccddN.exe
2252	b5b4eeb48afcdafa22ee0f22a09407c49d0b36b4ec3787e7a5089a0297e7ccddN.exe
2252	b5b4eeb48afcdafa22ee0f22a09407c49d0b36b4ec3787e7a5089a0297e7ccddN.exe
2252	b5b4eeb48afcdafa22ee0f22a09407c49d0b36b4ec3787e7a5089a0297e7ccddN.exe
2364	explorer.exe
2364	explorer.exe
2364	explorer.exe
2364	explorer.exe
2364	explorer.exe
2364	explorer.exe
2364	explorer.exe
2364	explorer.exe
2364	explorer.exe
2364	explorer.exe
2364	explorer.exe
2364	explorer.exe
2364	explorer.exe
2364	explorer.exe
2364	explorer.exe
2364	explorer.exe
2824	svchost.exe
2824	svchost.exe
2824	svchost.exe
2824	svchost.exe
2824	svchost.exe
2824	svchost.exe
2824	svchost.exe
2824	svchost.exe
2824	svchost.exe
2824	svchost.exe
2824	svchost.exe
2824	svchost.exe
2824	svchost.exe
2824	svchost.exe
2824	svchost.exe
2824	svchost.exe
2364	explorer.exe
2824	svchost.exe
2824	svchost.exe
2364	explorer.exe
2364	explorer.exe
2824	svchost.exe
2364	explorer.exe
2824	svchost.exe
2364	explorer.exe
2364	explorer.exe
2824	svchost.exe
2364	explorer.exe
2824	svchost.exe
2364	explorer.exe
2824	svchost.exe

Suspicious behavior: GetForegroundWindowSpam 2 IoCs

pid	Process
2364	explorer.exe
2824	svchost.exe

Suspicious use of SetWindowsHookEx 10 IoCs

pid	Process
2252	b5b4eeb48afcdafa22ee0f22a09407c49d0b36b4ec3787e7a5089a0297e7ccddN.exe
2252	b5b4eeb48afcdafa22ee0f22a09407c49d0b36b4ec3787e7a5089a0297e7ccddN.exe
2364	explorer.exe
2364	explorer.exe
2200	spoolsv.exe
2200	spoolsv.exe
2824	svchost.exe
2824	svchost.exe
2976	spoolsv.exe
2976	spoolsv.exe

Suspicious use of WriteProcessMemory 28 IoCs

description	pid	Process	procid_target
PID 2252 wrote to memory of 2364	2252	b5b4eeb48afcdafa22ee0f22a09407c49d0b36b4ec3787e7a5089a0297e7ccddN.exe	29
PID 2252 wrote to memory of 2364	2252	b5b4eeb48afcdafa22ee0f22a09407c49d0b36b4ec3787e7a5089a0297e7ccddN.exe	29
PID 2252 wrote to memory of 2364	2252	b5b4eeb48afcdafa22ee0f22a09407c49d0b36b4ec3787e7a5089a0297e7ccddN.exe	29
PID 2252 wrote to memory of 2364	2252	b5b4eeb48afcdafa22ee0f22a09407c49d0b36b4ec3787e7a5089a0297e7ccddN.exe	29
PID 2364 wrote to memory of 2200	2364	explorer.exe	30
PID 2364 wrote to memory of 2200	2364	explorer.exe	30
PID 2364 wrote to memory of 2200	2364	explorer.exe	30
PID 2364 wrote to memory of 2200	2364	explorer.exe	30
PID 2200 wrote to memory of 2824	2200	spoolsv.exe	31
PID 2200 wrote to memory of 2824	2200	spoolsv.exe	31
PID 2200 wrote to memory of 2824	2200	spoolsv.exe	31
PID 2200 wrote to memory of 2824	2200	spoolsv.exe	31
PID 2824 wrote to memory of 2976	2824	svchost.exe	32
PID 2824 wrote to memory of 2976	2824	svchost.exe	32
PID 2824 wrote to memory of 2976	2824	svchost.exe	32
PID 2824 wrote to memory of 2976	2824	svchost.exe	32
PID 2364 wrote to memory of 2832	2364	explorer.exe	33
PID 2364 wrote to memory of 2832	2364	explorer.exe	33
PID 2364 wrote to memory of 2832	2364	explorer.exe	33
PID 2364 wrote to memory of 2832	2364	explorer.exe	33
PID 2824 wrote to memory of 2600	2824	svchost.exe	34
PID 2824 wrote to memory of 2600	2824	svchost.exe	34
PID 2824 wrote to memory of 2600	2824	svchost.exe	34
PID 2824 wrote to memory of 2600	2824	svchost.exe	34
PID 2824 wrote to memory of 940	2824	svchost.exe	37
PID 2824 wrote to memory of 940	2824	svchost.exe	37
PID 2824 wrote to memory of 940	2824	svchost.exe	37
PID 2824 wrote to memory of 940	2824	svchost.exe	37

C:\Users\Admin\AppData\Local\Temp\b5b4eeb48afcdafa22ee0f22a09407c49d0b36b4ec3787e7a5089a0297e7ccddN.exe
"C:\Users\Admin\AppData\Local\Temp\b5b4eeb48afcdafa22ee0f22a09407c49d0b36b4ec3787e7a5089a0297e7ccddN.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:2252
- \??\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:2364
- - \??\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:2200
  - - \??\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:2824
    - - \??\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:2976
    - - C:\Windows\SysWOW64\schtasks.exe
        
        schtasks /create /tn "svchost" /tr "c:\windows\resources\svchost.exe" /sc daily /st 03:28 /f
        5⤵
        System Location Discovery: System Language Discovery
        Scheduled Task/Job: Scheduled Task
        
        PID:2600
    - - C:\Windows\SysWOW64\schtasks.exe
        
        schtasks /create /tn "svchost" /tr "c:\windows\resources\svchost.exe" /sc daily /st 03:29 /f
        5⤵
        System Location Discovery: System Language Discovery
        Scheduled Task/Job: Scheduled Task
        
        PID:940
- - C:\Windows\Explorer.exe
    C:\Windows\Explorer.exe
    3⤵
    PID:2832

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

C:\Windows\Resources\spoolsv.exe

Filesize
135KB

MD5
8b3066b6909f6c4897d4cc08eefbcf0e

SHA1
fe2aafdf378283192c115e5ace668755e6ddefad

SHA256
c80eb5d6b528cba1bffbf015813ece4f29f89bb725291763ec63e57e93d51616

SHA512
52b272d43f7b92f9e72a61a189ed113825ba6712af01a2f93ae2f9e85a706b2541616414a362e50af05ceea18607aaed6188791e8e7ba0650681c762ba97f3ac

Download Submit
\Windows\Resources\Themes\explorer.exe

Filesize
135KB

MD5
d130a413478b6266d4a36d9fce1e3234

SHA1
7127164c5c6218b7ef6d001478f7822be34ad5ab

SHA256
3b05205ad0f31a8700173accfda5ed93c3fb0534ab2f3de5a452cf012cd1282e

SHA512
9963012193bc807b8a32efb59d1fdae4e081cf655e216641fbcc1a15a3fb123ca93d0056421a5e31566c277f1ef537c6c552f9bdc71cacdd3ef548145802cea7

Download Submit
\Windows\Resources\svchost.exe

Filesize
135KB

MD5
50b4c42c54b234b4240c063c2feea6ed

SHA1
65f57e7179eeb32808076428f5ee025af751aa9c

SHA256
eb5d315f5bd375e6bc8f9e612a0b62fbf6faf677f724a827e3338313e3a25e8d

SHA512
b7c849ed98cd831fa5824589c7dfdbc12799691fe91e4038d54625dbfd68b171303c84994246ca83c31a71a2f1870b40a525fb77cfc24bb91f36158b0fc4f962

Download Submit
memory/2200-42-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2252-0-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2252-8-0x0000000000270000-0x000000000028F000-memory.dmp

Filesize
124KB

Download
memory/2252-43-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2364-44-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2824-36-0x0000000000370000-0x000000000038F000-memory.dmp

Filesize
124KB

Download
memory/2824-45-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2824-46-0x0000000000370000-0x000000000038F000-memory.dmp

Filesize
124KB

Download
memory/2976-41-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download