1bcfa7031a7b12683ac4a0d5d4f273e994b17acf6bb3b5d19ce2c29ea3464dbf

Analysis

max time kernel
150s
max time network
120s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
19/09/2024, 18:52

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General

Target

1bcfa7031a7b12683ac4a0d5d4f273e994b17acf6bb3b5d19ce2c29ea3464dbf.exe
Size

135KB
MD5

b2fdd1905502e4c1954e944ad01f0c8b
SHA1

c7f479bad23978c6e26cc7055d0f543d82261229
SHA256

1bcfa7031a7b12683ac4a0d5d4f273e994b17acf6bb3b5d19ce2c29ea3464dbf
SHA512

ab3515f0a5c59c032e0d8f93cf98ee9cb29e070d73a36b52ce4f0f0de062102c9f12251a2c1b8339f38e829bf442a248eba61f5ad3533ba0661413b61161e1c9
SSDEEP

1536:XfsEqouTRcG/Mzvgf7xEuvnXNTRdUzwTekUOisZ1yDDajtXbgnu:XVqoCl/YgjxEufVU0TbTyDDalUu

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-1-5-21-1506706701-1246725540-2219210854-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	svchost.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-1506706701-1246725540-2219210854-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	explorer.exe

Executes dropped EXE 4 IoCs

pid	Process
2468	explorer.exe
1624	spoolsv.exe
2412	svchost.exe
2668	spoolsv.exe

Loads dropped DLL 4 IoCs

pid	Process
1088	1bcfa7031a7b12683ac4a0d5d4f273e994b17acf6bb3b5d19ce2c29ea3464dbf.exe
2468	explorer.exe
1624	spoolsv.exe
2412	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"	svchost.exe
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

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	1bcfa7031a7b12683ac4a0d5d4f273e994b17acf6bb3b5d19ce2c29ea3464dbf.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 8 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	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	1bcfa7031a7b12683ac4a0d5d4f273e994b17acf6bb3b5d19ce2c29ea3464dbf.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 3 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
2904	schtasks.exe
1400	schtasks.exe
2672	schtasks.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
1088	1bcfa7031a7b12683ac4a0d5d4f273e994b17acf6bb3b5d19ce2c29ea3464dbf.exe
1088	1bcfa7031a7b12683ac4a0d5d4f273e994b17acf6bb3b5d19ce2c29ea3464dbf.exe
1088	1bcfa7031a7b12683ac4a0d5d4f273e994b17acf6bb3b5d19ce2c29ea3464dbf.exe
1088	1bcfa7031a7b12683ac4a0d5d4f273e994b17acf6bb3b5d19ce2c29ea3464dbf.exe
1088	1bcfa7031a7b12683ac4a0d5d4f273e994b17acf6bb3b5d19ce2c29ea3464dbf.exe
1088	1bcfa7031a7b12683ac4a0d5d4f273e994b17acf6bb3b5d19ce2c29ea3464dbf.exe
1088	1bcfa7031a7b12683ac4a0d5d4f273e994b17acf6bb3b5d19ce2c29ea3464dbf.exe
1088	1bcfa7031a7b12683ac4a0d5d4f273e994b17acf6bb3b5d19ce2c29ea3464dbf.exe
1088	1bcfa7031a7b12683ac4a0d5d4f273e994b17acf6bb3b5d19ce2c29ea3464dbf.exe
1088	1bcfa7031a7b12683ac4a0d5d4f273e994b17acf6bb3b5d19ce2c29ea3464dbf.exe
1088	1bcfa7031a7b12683ac4a0d5d4f273e994b17acf6bb3b5d19ce2c29ea3464dbf.exe
1088	1bcfa7031a7b12683ac4a0d5d4f273e994b17acf6bb3b5d19ce2c29ea3464dbf.exe
1088	1bcfa7031a7b12683ac4a0d5d4f273e994b17acf6bb3b5d19ce2c29ea3464dbf.exe
1088	1bcfa7031a7b12683ac4a0d5d4f273e994b17acf6bb3b5d19ce2c29ea3464dbf.exe
1088	1bcfa7031a7b12683ac4a0d5d4f273e994b17acf6bb3b5d19ce2c29ea3464dbf.exe
1088	1bcfa7031a7b12683ac4a0d5d4f273e994b17acf6bb3b5d19ce2c29ea3464dbf.exe
1088	1bcfa7031a7b12683ac4a0d5d4f273e994b17acf6bb3b5d19ce2c29ea3464dbf.exe
2468	explorer.exe
2468	explorer.exe
2468	explorer.exe
2468	explorer.exe
2468	explorer.exe
2468	explorer.exe
2468	explorer.exe
2468	explorer.exe
2468	explorer.exe
2468	explorer.exe
2468	explorer.exe
2468	explorer.exe
2468	explorer.exe
2468	explorer.exe
2468	explorer.exe
2468	explorer.exe
2412	svchost.exe
2412	svchost.exe
2412	svchost.exe
2412	svchost.exe
2412	svchost.exe
2412	svchost.exe
2412	svchost.exe
2412	svchost.exe
2412	svchost.exe
2412	svchost.exe
2412	svchost.exe
2412	svchost.exe
2412	svchost.exe
2412	svchost.exe
2412	svchost.exe
2412	svchost.exe
2468	explorer.exe
2412	svchost.exe
2412	svchost.exe
2468	explorer.exe
2468	explorer.exe
2468	explorer.exe
2412	svchost.exe
2468	explorer.exe
2468	explorer.exe
2412	svchost.exe
2468	explorer.exe
2412	svchost.exe
2468	explorer.exe
2412	svchost.exe
2412	svchost.exe

Suspicious behavior: GetForegroundWindowSpam 2 IoCs

pid	Process
2468	explorer.exe
2412	svchost.exe

Suspicious use of SetWindowsHookEx 10 IoCs

pid	Process
1088	1bcfa7031a7b12683ac4a0d5d4f273e994b17acf6bb3b5d19ce2c29ea3464dbf.exe
1088	1bcfa7031a7b12683ac4a0d5d4f273e994b17acf6bb3b5d19ce2c29ea3464dbf.exe
2468	explorer.exe
2468	explorer.exe
1624	spoolsv.exe
1624	spoolsv.exe
2412	svchost.exe
2412	svchost.exe
2668	spoolsv.exe
2668	spoolsv.exe

Suspicious use of WriteProcessMemory 32 IoCs

description	pid	Process	procid_target
PID 1088 wrote to memory of 2468	1088	1bcfa7031a7b12683ac4a0d5d4f273e994b17acf6bb3b5d19ce2c29ea3464dbf.exe	31
PID 1088 wrote to memory of 2468	1088	1bcfa7031a7b12683ac4a0d5d4f273e994b17acf6bb3b5d19ce2c29ea3464dbf.exe	31
PID 1088 wrote to memory of 2468	1088	1bcfa7031a7b12683ac4a0d5d4f273e994b17acf6bb3b5d19ce2c29ea3464dbf.exe	31
PID 1088 wrote to memory of 2468	1088	1bcfa7031a7b12683ac4a0d5d4f273e994b17acf6bb3b5d19ce2c29ea3464dbf.exe	31
PID 2468 wrote to memory of 1624	2468	explorer.exe	32
PID 2468 wrote to memory of 1624	2468	explorer.exe	32
PID 2468 wrote to memory of 1624	2468	explorer.exe	32
PID 2468 wrote to memory of 1624	2468	explorer.exe	32
PID 1624 wrote to memory of 2412	1624	spoolsv.exe	33
PID 1624 wrote to memory of 2412	1624	spoolsv.exe	33
PID 1624 wrote to memory of 2412	1624	spoolsv.exe	33
PID 1624 wrote to memory of 2412	1624	spoolsv.exe	33
PID 2412 wrote to memory of 2668	2412	svchost.exe	34
PID 2412 wrote to memory of 2668	2412	svchost.exe	34
PID 2412 wrote to memory of 2668	2412	svchost.exe	34
PID 2412 wrote to memory of 2668	2412	svchost.exe	34
PID 2468 wrote to memory of 2644	2468	explorer.exe	35
PID 2468 wrote to memory of 2644	2468	explorer.exe	35
PID 2468 wrote to memory of 2644	2468	explorer.exe	35
PID 2468 wrote to memory of 2644	2468	explorer.exe	35
PID 2412 wrote to memory of 2672	2412	svchost.exe	36
PID 2412 wrote to memory of 2672	2412	svchost.exe	36
PID 2412 wrote to memory of 2672	2412	svchost.exe	36
PID 2412 wrote to memory of 2672	2412	svchost.exe	36
PID 2412 wrote to memory of 2904	2412	svchost.exe	39
PID 2412 wrote to memory of 2904	2412	svchost.exe	39
PID 2412 wrote to memory of 2904	2412	svchost.exe	39
PID 2412 wrote to memory of 2904	2412	svchost.exe	39
PID 2412 wrote to memory of 1400	2412	svchost.exe	41
PID 2412 wrote to memory of 1400	2412	svchost.exe	41
PID 2412 wrote to memory of 1400	2412	svchost.exe	41
PID 2412 wrote to memory of 1400	2412	svchost.exe	41

C:\Users\Admin\AppData\Local\Temp\1bcfa7031a7b12683ac4a0d5d4f273e994b17acf6bb3b5d19ce2c29ea3464dbf.exe
"C:\Users\Admin\AppData\Local\Temp\1bcfa7031a7b12683ac4a0d5d4f273e994b17acf6bb3b5d19ce2c29ea3464dbf.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:1088
- \??\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:2468
- - \??\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:1624
  - - \??\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:2412
    - - \??\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:2668
    - - C:\Windows\SysWOW64\schtasks.exe
        
        schtasks /create /tn "svchost" /tr "c:\windows\resources\svchost.exe" /sc daily /st 18:54 /f
        5⤵
        System Location Discovery: System Language Discovery
        Scheduled Task/Job: Scheduled Task
        
        PID:2672
    - - C:\Windows\SysWOW64\schtasks.exe
        
        schtasks /create /tn "svchost" /tr "c:\windows\resources\svchost.exe" /sc daily /st 18:55 /f
        5⤵
        System Location Discovery: System Language Discovery
        Scheduled Task/Job: Scheduled Task
        
        PID:2904
    - - C:\Windows\SysWOW64\schtasks.exe
        
        schtasks /create /tn "svchost" /tr "c:\windows\resources\svchost.exe" /sc daily /st 18:56 /f
        5⤵
        System Location Discovery: System Language Discovery
        Scheduled Task/Job: Scheduled Task
        
        PID:1400
- - C:\Windows\Explorer.exe
    C:\Windows\Explorer.exe
    3⤵
    PID:2644

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
d61a95a3d30375834f9fff1098e257a5

SHA1
b195d08e720e196baaa32d7300f124eef0b0b6a9

SHA256
10a726fa92be584181045edf383d33929d6b07980ec72ccf27189220f59cf5ee

SHA512
a107c0ad6c28dcd0f2bdccc7fa158f442d24cf8ee0f9ae6baa28ca4241cc92786560c724bf13339bb5baef05886623e5fa41c560a3b268e60d869d72a4296b74

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

Filesize
135KB

MD5
cb79ae1518f0c875281ad1ee375ea8e5

SHA1
618133e19d6f01ba46412566ad517c9a64116b83

SHA256
3bcd5296d114fe918245632df8acc94917ede9264f171d7f12068fa70a33863d

SHA512
9caf8854dae4a00933b18acb2fac0be7eecdea963ff1e54cd2c8b9d9a3de1e632a31dd6b256c21b55510ad84a49a166c6b907687431d95014f3175531487b965

Download Submit
\Windows\Resources\svchost.exe

Filesize
135KB

MD5
628fcd717c4e79f75ee87568287ca4c9

SHA1
4e22c4c1fab66a8f4b931904ba6656e0eeb4d55a

SHA256
f479c5af45a8c462c4300236835d49a698af5da081104e492b2323784a2d361c

SHA512
346f4896457385f5c709f6a7851f14a00b35c0f64a379b9cbe3de576f101054f75e3a5cb6ab4fa31df877a98f73986ebac2c4635748e1610bdd51ec25a57b9f0

Download Submit
memory/1088-0-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1088-10-0x0000000000310000-0x000000000032F000-memory.dmp

Filesize
124KB

Download
memory/1088-43-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1624-42-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2412-36-0x0000000000270000-0x000000000028F000-memory.dmp

Filesize
124KB

Download
memory/2412-46-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2468-44-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2468-45-0x00000000002D0000-0x00000000002EF000-memory.dmp

Filesize
124KB

Download
memory/2668-41-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download