ba4d2982775c59fa3813e78c4c692a09f97ccc06fab1bd95d7e5dedc93816b24

Analysis

max time kernel
149s
max time network
154s
platform
windows10-ltsc_2021_x64
resource
win10ltsc2021-20260513-en
resource tags

arch:x64arch:x86image:win10ltsc2021-20260513-enlocale:en-usos:windows10-ltsc_2021-x64systemwindows
submitted
30/05/2026, 16:53

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General

Target
Download Navigator/Osasoi.dll
Size 455KB
Sample260530-vd57caas21
SHA256 ba4d2982775c59fa3813e78c4c692a09f97ccc06fab1bd95d7e5dedc93816b24
MD5 f53cd3583c38807e7f0d4cf275039c90
SHA1 b09deac2273f33e124b5594b3ebeabcf211dd0f9
SHA512 e35d4bc96b44bd0c10ffbf40fd771bc9aed1f4036fcb2508ede773db2e975dd611319f1a297cabfed91de12d5bfe3eee5d0c0d4e11c5eea8fc62ef62c3e87877
SSDEEP 12288:i0DKzK6MWpVQJ/lU+jau2pE7mWfxIEF47G:KMWpq1+E2pE7dxTF47G
TLSH
T1A3A47D53BBD0C03DC26A2530656AE37525AEBC315F3482C7A7846E6E1E306C19AFB717
MD5 SHA1 SHA512 SSDEEP TLSH

Score

3^/10

discovery

Malware Config

Signatures

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2760	3688	WerFault.exe	83

System Location Discovery: System Language Discovery 1 TTPs 1 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

Suspicious use of WriteProcessMemory 1 IoCs

description	pid	Process	procid_target
PID 3452 wrote to memory of 3688	3452	rundll32.exe	83

C:\Windows\system32\rundll32.exe
rundll32.exe "C:\Users\Admin\AppData\Local\Temp\Download Navigator\Osasoi.dll",#1
1⤵
- Suspicious use of WriteProcessMemory
PID:3452
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe "C:\Users\Admin\AppData\Local\Temp\Download Navigator\Osasoi.dll",#1
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3688
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 3688 -s 728
    3⤵
    - Program crash
    PID:2760

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 3688 -ip 3688
1⤵
PID:2516

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

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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