0e87db588c7740c7c8e9d19af9b4843e497759300888445388ff915c5ccd145c

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20260513-en
resource tags

arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows
submitted
07/09/2026, 13:00

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General

Target
amstream.dll
Size 63KB
Sample260907-p8nb5avygx
SHA256 0e87db588c7740c7c8e9d19af9b4843e497759300888445388ff915c5ccd145c
MD5 f193d381bb6e9ef51c6bb581786aa3e9
SHA1 0ec4660ea9cdf8c5565da9bbea5f0c2881932e33
SHA512 4b792e63fce45fbe095a1e851cc1509625310ac132710e361176628665834b1bf504e142bc86928056ed5d14266dcd6bb7028869d02006910fdae1496cb55b2a
SSDEEP 1536:NsocrtDASJV15DlF/rEtAeLtFjolD+SrBT:Nsr5DlNrwARD+SrB
TLSH
T1B9536C1333EAC07EC6F39232892B379A76EAEF16151B511562113E4E1F71182DBFD24A
MD5 SHA1 SHA512 SSDEEP TLSH

Score

3^/10

discovery

Malware Config

Signatures

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	regsvr32.exe

Modifies registry class 24 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{4E6CDE29-C0C4-11D0-8FF1-00C04FD9189D}\1.0\0\win32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\amstream.dll"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{7DB01C96-C0C3-11D0-8FF1-00C04FD9189D}\ProxyStubClsid32	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{7DB01C96-C0C3-11D0-8FF1-00C04FD9189D}	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{7DB01C96-C0C3-11D0-8FF1-00C04FD9189D}\ProxyStubClsid32	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{7DB01C96-C0C3-11D0-8FF1-00C04FD9189D}\TypeLib	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{7DB01C96-C0C3-11D0-8FF1-00C04FD9189D}\TypeLib\ = "{4E6CDE29-C0C4-11D0-8FF1-00C04FD9189D}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{7DB01C96-C0C3-11D0-8FF1-00C04FD9189D}\TypeLib\Version = "1.0"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{4E6CDE29-C0C4-11D0-8FF1-00C04FD9189D}	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{4E6CDE29-C0C4-11D0-8FF1-00C04FD9189D}\1.0	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{4E6CDE29-C0C4-11D0-8FF1-00C04FD9189D}\1.0\ = "DirectShowStream 1.0 Type Library"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{4E6CDE29-C0C4-11D0-8FF1-00C04FD9189D}\1.0\HELPDIR\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{7DB01C96-C0C3-11D0-8FF1-00C04FD9189D}\TypeLib\ = "{4E6CDE29-C0C4-11D0-8FF1-00C04FD9189D}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{7DB01C96-C0C3-11D0-8FF1-00C04FD9189D}\TypeLib\Version = "1.0"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{7DB01C96-C0C3-11D0-8FF1-00C04FD9189D}\ProxyStubClsid32\ = "{00020424-0000-0000-C000-000000000046}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{4E6CDE29-C0C4-11D0-8FF1-00C04FD9189D}\1.0\FLAGS	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{4E6CDE29-C0C4-11D0-8FF1-00C04FD9189D}\1.0\FLAGS\ = "0"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{4E6CDE29-C0C4-11D0-8FF1-00C04FD9189D}\1.0\0	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{4E6CDE29-C0C4-11D0-8FF1-00C04FD9189D}\1.0\0\win32	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{7DB01C96-C0C3-11D0-8FF1-00C04FD9189D}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{7DB01C96-C0C3-11D0-8FF1-00C04FD9189D}\ProxyStubClsid32\ = "{00020424-0000-0000-C000-000000000046}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{4E6CDE29-C0C4-11D0-8FF1-00C04FD9189D}\1.0\HELPDIR	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{7DB01C96-C0C3-11D0-8FF1-00C04FD9189D}\ = "IDirectShowStream"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{7DB01C96-C0C3-11D0-8FF1-00C04FD9189D}\TypeLib	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{7DB01C96-C0C3-11D0-8FF1-00C04FD9189D}\ = "IDirectShowStream"	regsvr32.exe

Suspicious use of WriteProcessMemory 1 IoCs

description	pid	Process	procid_target
PID 2240 wrote to memory of 4284	2240	regsvr32.exe	85

C:\Windows\system32\regsvr32.exe
regsvr32 /s C:\Users\Admin\AppData\Local\Temp\amstream.dll
1⤵
- Suspicious use of WriteProcessMemory
PID:2240
- C:\Windows\SysWOW64\regsvr32.exe
  /s C:\Users\Admin\AppData\Local\Temp\amstream.dll
  2⤵
  - System Location Discovery: System Language Discovery
  - Modifies registry class
  PID:4284

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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