21699db7cbd7023f9a73fb5457ce84f3a6e48e7cb4afc8f5ef5c53a30a30ab26

Analysis

max time kernel
120s
max time network
18s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
05/10/2024, 02:25

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General

Target

21699db7cbd7023f9a73fb5457ce84f3a6e48e7cb4afc8f5ef5c53a30a30ab26N.exe
Size

135KB
MD5

34d8a514f9b1257a6c34487dc3592ce0
SHA1

c7d1cbb4b024e6c900ed8bda23e03520e11134bb
SHA256

21699db7cbd7023f9a73fb5457ce84f3a6e48e7cb4afc8f5ef5c53a30a30ab26
SHA512

d21332a4257567998b8244a08e01347ac912332e71c9c45962f6cbab02aafb54f439c337c307f5a840c9d6d3bf5023f3b823a57c0d7f68b3f7c5275e894cf90f
SSDEEP

1536:UfsEqouTRcG/Mzvgf7xEuvnXNTRdUzwTekUOisZ1yDDajtXbV+P:UVqoCl/YgjxEufVU0TbTyDDalgP

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-1-5-21-3533259084-2542256011-65585152-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	explorer.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3533259084-2542256011-65585152-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	svchost.exe

Executes dropped EXE 4 IoCs

pid	Process
2916	explorer.exe
2280	spoolsv.exe
1668	svchost.exe
2080	spoolsv.exe

Loads dropped DLL 4 IoCs

pid	Process
2792	21699db7cbd7023f9a73fb5457ce84f3a6e48e7cb4afc8f5ef5c53a30a30ab26N.exe
2916	explorer.exe
2280	spoolsv.exe
1668	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\tjud.exe	explorer.exe
File opened for modification	\??\c:\windows\resources\themes\explorer.exe	21699db7cbd7023f9a73fb5457ce84f3a6e48e7cb4afc8f5ef5c53a30a30ab26N.exe
File opened for modification	\??\c:\windows\resources\spoolsv.exe	explorer.exe
File opened for modification	\??\c:\windows\resources\svchost.exe	spoolsv.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	21699db7cbd7023f9a73fb5457ce84f3a6e48e7cb4afc8f5ef5c53a30a30ab26N.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
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
2932	schtasks.exe
2364	schtasks.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
2792	21699db7cbd7023f9a73fb5457ce84f3a6e48e7cb4afc8f5ef5c53a30a30ab26N.exe
2792	21699db7cbd7023f9a73fb5457ce84f3a6e48e7cb4afc8f5ef5c53a30a30ab26N.exe
2792	21699db7cbd7023f9a73fb5457ce84f3a6e48e7cb4afc8f5ef5c53a30a30ab26N.exe
2792	21699db7cbd7023f9a73fb5457ce84f3a6e48e7cb4afc8f5ef5c53a30a30ab26N.exe
2792	21699db7cbd7023f9a73fb5457ce84f3a6e48e7cb4afc8f5ef5c53a30a30ab26N.exe
2792	21699db7cbd7023f9a73fb5457ce84f3a6e48e7cb4afc8f5ef5c53a30a30ab26N.exe
2792	21699db7cbd7023f9a73fb5457ce84f3a6e48e7cb4afc8f5ef5c53a30a30ab26N.exe
2792	21699db7cbd7023f9a73fb5457ce84f3a6e48e7cb4afc8f5ef5c53a30a30ab26N.exe
2792	21699db7cbd7023f9a73fb5457ce84f3a6e48e7cb4afc8f5ef5c53a30a30ab26N.exe
2792	21699db7cbd7023f9a73fb5457ce84f3a6e48e7cb4afc8f5ef5c53a30a30ab26N.exe
2792	21699db7cbd7023f9a73fb5457ce84f3a6e48e7cb4afc8f5ef5c53a30a30ab26N.exe
2792	21699db7cbd7023f9a73fb5457ce84f3a6e48e7cb4afc8f5ef5c53a30a30ab26N.exe
2792	21699db7cbd7023f9a73fb5457ce84f3a6e48e7cb4afc8f5ef5c53a30a30ab26N.exe
2792	21699db7cbd7023f9a73fb5457ce84f3a6e48e7cb4afc8f5ef5c53a30a30ab26N.exe
2792	21699db7cbd7023f9a73fb5457ce84f3a6e48e7cb4afc8f5ef5c53a30a30ab26N.exe
2792	21699db7cbd7023f9a73fb5457ce84f3a6e48e7cb4afc8f5ef5c53a30a30ab26N.exe
2792	21699db7cbd7023f9a73fb5457ce84f3a6e48e7cb4afc8f5ef5c53a30a30ab26N.exe
2916	explorer.exe
2916	explorer.exe
2916	explorer.exe
2916	explorer.exe
2916	explorer.exe
2916	explorer.exe
2916	explorer.exe
2916	explorer.exe
2916	explorer.exe
2916	explorer.exe
2916	explorer.exe
2916	explorer.exe
2916	explorer.exe
2916	explorer.exe
2916	explorer.exe
2916	explorer.exe
1668	svchost.exe
1668	svchost.exe
1668	svchost.exe
1668	svchost.exe
1668	svchost.exe
1668	svchost.exe
1668	svchost.exe
1668	svchost.exe
1668	svchost.exe
1668	svchost.exe
1668	svchost.exe
1668	svchost.exe
1668	svchost.exe
1668	svchost.exe
1668	svchost.exe
1668	svchost.exe
2916	explorer.exe
2916	explorer.exe
2916	explorer.exe
1668	svchost.exe
1668	svchost.exe
2916	explorer.exe
1668	svchost.exe
2916	explorer.exe
1668	svchost.exe
2916	explorer.exe
1668	svchost.exe
2916	explorer.exe
1668	svchost.exe
2916	explorer.exe
1668	svchost.exe

Suspicious behavior: GetForegroundWindowSpam 2 IoCs

pid	Process
2916	explorer.exe
1668	svchost.exe

Suspicious use of SetWindowsHookEx 10 IoCs

pid	Process
2792	21699db7cbd7023f9a73fb5457ce84f3a6e48e7cb4afc8f5ef5c53a30a30ab26N.exe
2792	21699db7cbd7023f9a73fb5457ce84f3a6e48e7cb4afc8f5ef5c53a30a30ab26N.exe
2916	explorer.exe
2916	explorer.exe
2280	spoolsv.exe
2280	spoolsv.exe
1668	svchost.exe
1668	svchost.exe
2080	spoolsv.exe
2080	spoolsv.exe

Suspicious use of WriteProcessMemory 28 IoCs

description	pid	Process	procid_target
PID 2792 wrote to memory of 2916	2792	21699db7cbd7023f9a73fb5457ce84f3a6e48e7cb4afc8f5ef5c53a30a30ab26N.exe	28
PID 2792 wrote to memory of 2916	2792	21699db7cbd7023f9a73fb5457ce84f3a6e48e7cb4afc8f5ef5c53a30a30ab26N.exe	28
PID 2792 wrote to memory of 2916	2792	21699db7cbd7023f9a73fb5457ce84f3a6e48e7cb4afc8f5ef5c53a30a30ab26N.exe	28
PID 2792 wrote to memory of 2916	2792	21699db7cbd7023f9a73fb5457ce84f3a6e48e7cb4afc8f5ef5c53a30a30ab26N.exe	28
PID 2916 wrote to memory of 2280	2916	explorer.exe	29
PID 2916 wrote to memory of 2280	2916	explorer.exe	29
PID 2916 wrote to memory of 2280	2916	explorer.exe	29
PID 2916 wrote to memory of 2280	2916	explorer.exe	29
PID 2280 wrote to memory of 1668	2280	spoolsv.exe	30
PID 2280 wrote to memory of 1668	2280	spoolsv.exe	30
PID 2280 wrote to memory of 1668	2280	spoolsv.exe	30
PID 2280 wrote to memory of 1668	2280	spoolsv.exe	30
PID 1668 wrote to memory of 2080	1668	svchost.exe	31
PID 1668 wrote to memory of 2080	1668	svchost.exe	31
PID 1668 wrote to memory of 2080	1668	svchost.exe	31
PID 1668 wrote to memory of 2080	1668	svchost.exe	31
PID 2916 wrote to memory of 1612	2916	explorer.exe	32
PID 2916 wrote to memory of 1612	2916	explorer.exe	32
PID 2916 wrote to memory of 1612	2916	explorer.exe	32
PID 2916 wrote to memory of 1612	2916	explorer.exe	32
PID 1668 wrote to memory of 2932	1668	svchost.exe	33
PID 1668 wrote to memory of 2932	1668	svchost.exe	33
PID 1668 wrote to memory of 2932	1668	svchost.exe	33
PID 1668 wrote to memory of 2932	1668	svchost.exe	33
PID 1668 wrote to memory of 2364	1668	svchost.exe	38
PID 1668 wrote to memory of 2364	1668	svchost.exe	38
PID 1668 wrote to memory of 2364	1668	svchost.exe	38
PID 1668 wrote to memory of 2364	1668	svchost.exe	38

C:\Users\Admin\AppData\Local\Temp\21699db7cbd7023f9a73fb5457ce84f3a6e48e7cb4afc8f5ef5c53a30a30ab26N.exe
"C:\Users\Admin\AppData\Local\Temp\21699db7cbd7023f9a73fb5457ce84f3a6e48e7cb4afc8f5ef5c53a30a30ab26N.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:2792
- \??\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:2916
- - \??\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:2280
  - - \??\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:1668
    - - \??\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:2080
    - - C:\Windows\SysWOW64\schtasks.exe
        
        schtasks /create /tn "svchost" /tr "c:\windows\resources\svchost.exe" /sc daily /st 02:27 /f
        5⤵
        System Location Discovery: System Language Discovery
        Scheduled Task/Job: Scheduled Task
        
        PID:2932
    - - C:\Windows\SysWOW64\schtasks.exe
        
        schtasks /create /tn "svchost" /tr "c:\windows\resources\svchost.exe" /sc daily /st 02:28 /f
        5⤵
        System Location Discovery: System Language Discovery
        Scheduled Task/Job: Scheduled Task
        
        PID:2364
- - C:\Windows\Explorer.exe
    C:\Windows\Explorer.exe
    3⤵
    PID:1612

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
b82ce6da87488d9f9b497b7b4b40d5ba

SHA1
5e31ea01a8585c138a65494fa381e52076f41909

SHA256
be7c9b0dfe2849311867256c94270ad4e879ae5b6056defd8a630e99bab6eb5c

SHA512
12f580f126fa4273d49d979ce56d39aa2e64aa4ced3392b0630e8776f1edaf40c7ed01ef790a9c8273e9718ec46e4404a5635ddc4cf8aef3c10dee3075e16ddd

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

Filesize
135KB

MD5
5d913bbeaf365e1e10e099bca90263f6

SHA1
f49bd3c73bf8d7c2ffeda83ad54832a6b3f97d0d

SHA256
fdb51dddd4f6509d6e424c9dcdcbf4d5890c70fe7668ca529a1feb9448344487

SHA512
86e9de141b26dde4b362fa19818c75135a8529d95e1fc523bb24b3d464e17eef460d78b3c003e4b9df39872ff8693e352d41a40411ffe04356821de25047d2d5

Download Submit
\Windows\Resources\svchost.exe

Filesize
135KB

MD5
08642877c1dd3b3b0cfae7ca3c1bc96f

SHA1
c8f50b109241b7f5f4d0dbc33a57e7eb6a0a2095

SHA256
03fafdf57f977acb32fb9ae7db147b519d9f236409f6ebe7a2c1bde16e8372b4

SHA512
aab4f7a668ce23fabc5b31ad0dc9d1a1c9fb1b914421f04bad85593a39790ca3401c78969eb93990ba9051db34cd5870668acb57ac3fb4df5a235b59d96bef5f

Download Submit
memory/1668-45-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2080-41-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2280-30-0x00000000002C0000-0x00000000002DF000-memory.dmp

Filesize
124KB

Download
memory/2280-42-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2792-0-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2792-9-0x0000000000320000-0x000000000033F000-memory.dmp

Filesize
124KB

Download
memory/2792-43-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2916-44-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download