c231a387fdcae2650f939e4dd4cc41a11b14908f7cb5e91eb3de818d33660293

Analysis

max time kernel
91s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
08/01/2025, 03:03 UTC

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General

Target

true/vp8decoder.dll
Size

379KB
MD5

e247666cdea63da5a95aebc135908207
SHA1

4642f6c3973c41b7d1c9a73111a26c2d7ac9c392
SHA256

b419ed0374e3789b4f83d4af601f796d958e366562a0aaea5d2f81e82abdcf33
SHA512

06da11e694d5229783cfb058dcd04d855a1d0758beeaa97bcd886702a1502d0bf542e7890aa8f2e401be36ccf70376b5c091a5d328bb1abe738bc0798ab98a54
SSDEEP

6144:YIIDyjBnydesbWoiwS7dVIclCzoqHO/gCaEkkH8TuX6RTrWD4siZMZ+LG4IPWwc8:YI8tiDOzyH9H8Tu6h04fZMZoMPuvfj0h

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 35 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Webm.VP8Decoder.1\ = "WebM VP8 Decoder Filter"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{083863F1-70DE-11D0-BD40-00A0C911CE86}\Instance\{ED3110F3-5211-11DF-94AF-0026B977EEAA}\CLSID = "{ED3110F3-5211-11DF-94AF-0026B977EEAA}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{ED3110F1-5211-11DF-94AF-0026B977EEAA}\1.0\HELPDIR	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Webm.VP8Decoder	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Webm.VP8Decoder\CurVer	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{ED3110F1-5211-11DF-94AF-0026B977EEAA}\1.0\FLAGS	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{ED3110F1-5211-11DF-94AF-0026B977EEAA}\1.0\0\win32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\true\\vp8decoder.dll"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{ED3110F3-5211-11DF-94AF-0026B977EEAA}\ProgID\ = "Webm.VP8Decoder.1"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{ED3110F3-5211-11DF-94AF-0026B977EEAA}\VersionIndependentProgID\ = "Webm.VP8Decoder"	regsvr32.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{083863F1-70DE-11D0-BD40-00A0C911CE86}\Instance\{ED3110F3-5211-11DF-94AF-0026B977EEAA}\FilterData = 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	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Webm.VP8Decoder\CLSID	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Webm.VP8Decoder.1\CLSID\ = "{ED3110F3-5211-11DF-94AF-0026B977EEAA}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{ED3110F1-5211-11DF-94AF-0026B977EEAA}\1.0\FLAGS\ = "0"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{ED3110F3-5211-11DF-94AF-0026B977EEAA}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{ED3110F3-5211-11DF-94AF-0026B977EEAA}\TypeLib\ = "{ED3110F1-5211-11DF-94AF-0026B977EEAA}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{ED3110F3-5211-11DF-94AF-0026B977EEAA}\ = "WebM VP8 Decoder Filter"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{ED3110F3-5211-11DF-94AF-0026B977EEAA}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\true\\vp8decoder.dll"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Webm.VP8Decoder.1	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Webm.VP8Decoder\CurVer\ = "Webm.VP8Decoder.1"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Webm.VP8Decoder.1\CLSID	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{ED3110F1-5211-11DF-94AF-0026B977EEAA}\1.0	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{ED3110F3-5211-11DF-94AF-0026B977EEAA}\VersionIndependentProgID	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{ED3110F3-5211-11DF-94AF-0026B977EEAA}\ProgID	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Webm.VP8Decoder\CLSID\ = "{ED3110F3-5211-11DF-94AF-0026B977EEAA}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{083863F1-70DE-11D0-BD40-00A0C911CE86}\Instance\{ED3110F3-5211-11DF-94AF-0026B977EEAA}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{ED3110F1-5211-11DF-94AF-0026B977EEAA}\1.0\ = "VP8 Decoder Filter Type Library"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{ED3110F1-5211-11DF-94AF-0026B977EEAA}\1.0\0\win32	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{ED3110F3-5211-11DF-94AF-0026B977EEAA}\TypeLib	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{ED3110F3-5211-11DF-94AF-0026B977EEAA}\InprocServer32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{ED3110F3-5211-11DF-94AF-0026B977EEAA}\InprocServer32\ThreadingModel = "Both"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Webm.VP8Decoder\ = "WebM VP8 Decoder Filter"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{083863F1-70DE-11D0-BD40-00A0C911CE86}\Instance\{ED3110F3-5211-11DF-94AF-0026B977EEAA}\FriendlyName = "WebM VP8 Decoder Filter"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{ED3110F1-5211-11DF-94AF-0026B977EEAA}	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{ED3110F1-5211-11DF-94AF-0026B977EEAA}\1.0\0	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{ED3110F1-5211-11DF-94AF-0026B977EEAA}\1.0\HELPDIR\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\true"	regsvr32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 1544 wrote to memory of 1324	1544	regsvr32.exe	83
PID 1544 wrote to memory of 1324	1544	regsvr32.exe	83
PID 1544 wrote to memory of 1324	1544	regsvr32.exe	83

C:\Windows\system32\regsvr32.exe
regsvr32 /s C:\Users\Admin\AppData\Local\Temp\true\vp8decoder.dll
1⤵
- Suspicious use of WriteProcessMemory
PID:1544
- C:\Windows\SysWOW64\regsvr32.exe
  /s C:\Users\Admin\AppData\Local\Temp\true\vp8decoder.dll
  2⤵
  - System Location Discovery: System Language Discovery
  - Modifies registry class
  PID:1324

Network

DNS

228.249.119.40.in-addr.arpa

Remote address:

8.8.8.8:53

Request

228.249.119.40.in-addr.arpa

IN PTR

Response
DNS

181.129.81.91.in-addr.arpa

Remote address:

8.8.8.8:53

Request

181.129.81.91.in-addr.arpa

IN PTR

Response
DNS

95.221.229.192.in-addr.arpa

Remote address:

8.8.8.8:53

Request

95.221.229.192.in-addr.arpa

IN PTR

Response
DNS

67.31.126.40.in-addr.arpa

Remote address:

8.8.8.8:53

Request

67.31.126.40.in-addr.arpa

IN PTR

Response
DNS

217.106.137.52.in-addr.arpa

Remote address:

8.8.8.8:53

Request

217.106.137.52.in-addr.arpa

IN PTR

Response
DNS

196.249.167.52.in-addr.arpa

Remote address:

8.8.8.8:53

Request

196.249.167.52.in-addr.arpa

IN PTR

Response
DNS

212.20.149.52.in-addr.arpa

Remote address:

8.8.8.8:53

Request

212.20.149.52.in-addr.arpa

IN PTR

Response
DNS

15.164.165.52.in-addr.arpa

Remote address:

8.8.8.8:53

Request

15.164.165.52.in-addr.arpa

IN PTR

Response
DNS

20.49.80.91.in-addr.arpa

Remote address:

8.8.8.8:53

Request

20.49.80.91.in-addr.arpa

IN PTR

Response
DNS

133.130.81.91.in-addr.arpa

Remote address:

8.8.8.8:53

Request

133.130.81.91.in-addr.arpa

IN PTR

Response

No results found

8.8.8.8:53

228.249.119.40.in-addr.arpa

dns

73 B
159 B
1
1

DNS Request

228.249.119.40.in-addr.arpa
8.8.8.8:53

181.129.81.91.in-addr.arpa

dns

72 B
147 B
1
1

DNS Request

181.129.81.91.in-addr.arpa
8.8.8.8:53

95.221.229.192.in-addr.arpa

dns

73 B
144 B
1
1

DNS Request

95.221.229.192.in-addr.arpa
8.8.8.8:53

67.31.126.40.in-addr.arpa

dns

71 B
157 B
1
1

DNS Request

67.31.126.40.in-addr.arpa
8.8.8.8:53

217.106.137.52.in-addr.arpa

dns

73 B
147 B
1
1

DNS Request

217.106.137.52.in-addr.arpa
8.8.8.8:53

196.249.167.52.in-addr.arpa

dns

73 B
147 B
1
1

DNS Request

196.249.167.52.in-addr.arpa
8.8.8.8:53

212.20.149.52.in-addr.arpa

dns

72 B
146 B
1
1

DNS Request

212.20.149.52.in-addr.arpa
8.8.8.8:53

15.164.165.52.in-addr.arpa

dns

72 B
146 B
1
1

DNS Request

15.164.165.52.in-addr.arpa
8.8.8.8:53

20.49.80.91.in-addr.arpa

dns

70 B
145 B
1
1

DNS Request

20.49.80.91.in-addr.arpa
8.8.8.8:53

133.130.81.91.in-addr.arpa

dns

72 B
147 B
1
1

DNS Request

133.130.81.91.in-addr.arpa

MITRE ATT&CK Enterprise v15

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

Windows 7 deprecation

DNS Request

DNS Request

DNS Request

DNS Request

DNS Request

DNS Request

DNS Request

DNS Request

DNS Request

DNS Request

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

DNS Request

DNS Request

DNS Request

DNS Request

DNS Request

DNS Request

DNS Request

DNS Request

DNS Request

DNS Request

MITRE ATT&CK Enterprise v15

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