a66250f9ece44d75ce425e70e53236ed304bdafbc694aefaf6c83e45ecb8e9ed

Analysis

max time kernel
149s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20260513-en
resource tags

arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows
submitted
05/08/2026, 18:21

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General

Target
pdfCORE8.dll
Size 3.7MB
Sample260805-wzerysdp3w
SHA256 a66250f9ece44d75ce425e70e53236ed304bdafbc694aefaf6c83e45ecb8e9ed
MD5 2337a55dd3a5884ce5599b7b5d6027aa
SHA1 d22884f533f2abbd8d03336c7103f74642e991db
SHA512 c8975c9416e047255abca763f1ccbdda987b5ed679a592ed67ce6b876acfacd9167898b325d58661ea24e8605c7af0d4c0d4437172e6e426050927fd6bbee852
SSDEEP 98304:A4LMLEOsQahsGtiIwu5JCSM1UYFZY7lYSzPyi6:AhjIfCSM1pFSYs
TLSH
T16106CF13354880FBD16B127A9519B6A5F3BDF4700BE50CD76BD8B60C2D33C82B6296A7
MD5 SHA1 SHA512 SSDEEP TLSH

Score

7^/10

discovery

Malware Config

Signatures

Checks computer location settings 2 TTPs 1 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-1-5-21-2937465464-4167303362-2236413517-1000\Control Panel\International\Geo\Nation	rundll32.exe

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 2 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	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 4728 wrote to memory of 3460	4728	rundll32.exe	85
PID 3460 wrote to memory of 860	3460	rundll32.exe	86

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\pdfCORE8.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4728
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\pdfCORE8.dll,#1
  2⤵
  - Checks computer location settings
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3460
- - C:\Windows\SysWOW64\rundll32.exe
    "C:\Windows\SysWOW64\rundll32.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:860

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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