2de119b465a2e51cbab3293b51b419c49d6da1f497c68e17549839e0f6ae2a9b

Analysis

max time kernel
136s
max time network
108s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
17/08/2024, 03:08

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General

Target

$SYSDIR/mp4decoder.dll
Size

197KB
MD5

e8b4e9aaa5cc931b69401711506c6bd0
SHA1

e1321fe6483171207207802c5fcc85dd64e7375a
SHA256

8012aaf003cd11dcbbc7031a901fc876820672bdf0c6eeb83ea53bab0f94510e
SHA512

fecf59dc3a3d937e8b0ac2e46c4bb653a7f2c9980e6f44add839a49c68f07552287644ed508f74c8ccf4ab51dd753b09fbe9f350da23a45519d7cc8d77500dd7
SSDEEP

3072:CZGiO5QQqLFZH9NN8LAd1/hMjl7hWDq5Xs/c:Cu6QcFh9NGU1qJ74DE

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 9 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{083863F1-70DE-11D0-BD40-00A0C911CE86}\Instance\{025BE2E4-1787-4DA4-A585-C5B2B9EEB57C}\FriendlyName = "Evaer MP4 Demux"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{083863F1-70DE-11D0-BD40-00A0C911CE86}\Instance\{025BE2E4-1787-4DA4-A585-C5B2B9EEB57C}\CLSID = "{025BE2E4-1787-4DA4-A585-C5B2B9EEB57C}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{025BE2E4-1787-4DA4-A585-C5B2B9EEB57C}\ = "Evaer MP4 Demux"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{083863F1-70DE-11D0-BD40-00A0C911CE86}\Instance\{025BE2E4-1787-4DA4-A585-C5B2B9EEB57C}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{025BE2E4-1787-4DA4-A585-C5B2B9EEB57C}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\$SYSDIR\\mp4decoder.dll"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{025BE2E4-1787-4DA4-A585-C5B2B9EEB57C}\InprocServer32\ThreadingModel = "Both"	regsvr32.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{083863F1-70DE-11D0-BD40-00A0C911CE86}\Instance\{025BE2E4-1787-4DA4-A585-C5B2B9EEB57C}\FilterData = 02000000000060000300000000000000307069330000000000000000010000000000000000000000307479330000000088000000980000003170693308000000000000000100000000000000000000003074793300000000a8000000980000003270693308000000000000000100000000000000000000003074793300000000b80000009800000083eb36e44f52ce119f530020af0ba770000000000000000000000000000000007669647300001000800000aa00389b716175647300001000800000aa00389b71	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{025BE2E4-1787-4DA4-A585-C5B2B9EEB57C}	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{025BE2E4-1787-4DA4-A585-C5B2B9EEB57C}\InprocServer32	regsvr32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4900 wrote to memory of 1576	4900	regsvr32.exe	84
PID 4900 wrote to memory of 1576	4900	regsvr32.exe	84
PID 4900 wrote to memory of 1576	4900	regsvr32.exe	84

C:\Windows\system32\regsvr32.exe
regsvr32 /s C:\Users\Admin\AppData\Local\Temp\$SYSDIR\mp4decoder.dll
1⤵
- Suspicious use of WriteProcessMemory
PID:4900
- C:\Windows\SysWOW64\regsvr32.exe
  /s C:\Users\Admin\AppData\Local\Temp\$SYSDIR\mp4decoder.dll
  2⤵
  - System Location Discovery: System Language Discovery
  - Modifies registry class
  PID:1576

Network

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

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