fe76f28937b3d27d0c97f98e2a42a5432cde68af310ebe68fbc22db1f79c07fd

Analysis

max time kernel
119s
max time network
120s
platform
windows7_x64
resource
win7-20240729-en
resource tags

arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
submitted
24/08/2024, 02:06

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General

Target

UFDeMux.dll
Size

153KB
MD5

06a18d5fa650274b5e6a09b4f705ec43
SHA1

b7c7e0a320d1c04a8cb7addf5cb9087bf2d32fed
SHA256

6711789d58f4f96162ec812a9ff19d33e8ee4f8f321caefb8a386590650f5818
SHA512

07a2666783706174d6325bb51b640f290a8cb38c9de3f0da1ab8e7613820a6bb77c7ec0519710ba4411c0ed094df41ba9bf084a21ddc73e123c5cef52c929414
SSDEEP

3072:9mNcg3Iqa+WSs3rRjLTRjLO2VtLmL+yzE:9mPiN3jmLxzE

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 16 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Media Type\Extensions\.ucf\Subtype = "{F070A0E8-B213-47E4-8991-252AC82EE6A1}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{083863F1-70DE-11D0-BD40-00A0C911CE86}\Instance\{48CF8992-4161-49D6-9A9B-F1FDB3BAE74D}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{083863F1-70DE-11D0-BD40-00A0C911CE86}\Instance\{48CF8992-4161-49D6-9A9B-F1FDB3BAE74D}\FriendlyName = "UUSEE DeMultiplexer"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Media Type\{E436EB83-524F-11CE-9F53-0020AF0BA770}\{F070A0E8-B213-47E4-8991-252AC82EE6A1}\0 = "0,4,,46494c45"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Media Type\Extensions\.ucf	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{48CF8992-4161-49D6-9A9B-F1FDB3BAE74D}\InprocServer32\ThreadingModel = "Both"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Media Type\{E436EB83-524F-11CE-9F53-0020AF0BA770}\{F070A0E8-B213-47E4-8991-252AC82EE6A1}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Media Type\{E436EB83-524F-11CE-9F53-0020AF0BA770}\{F070A0E8-B213-47E4-8991-252AC82EE6A1}\Source Filter = "{E436EBB5-524F-11CE-9F53-0020AF0BA770}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Media Type\Extensions\.ucf\Source Filter = "{E436EBB5-524F-11CE-9F53-0020AF0BA770}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{48CF8992-4161-49D6-9A9B-F1FDB3BAE74D}\InprocServer32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{083863F1-70DE-11D0-BD40-00A0C911CE86}\Instance\{48CF8992-4161-49D6-9A9B-F1FDB3BAE74D}\CLSID = "{48CF8992-4161-49D6-9A9B-F1FDB3BAE74D}"	regsvr32.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{083863F1-70DE-11D0-BD40-00A0C911CE86}\Instance\{48CF8992-4161-49D6-9A9B-F1FDB3BAE74D}\FilterData = 02000000000060000200000000000000307069330000000000000000010000000000000000000000307479330000000060000000600000003170693308000000000000000100000000000000000000003074793300000000600000006000000000000000000000000000000000000000	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Media Type\Extensions\.ucf\Media Type = "{E436EB83-524F-11CE-9F53-0020AF0BA770}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{48CF8992-4161-49D6-9A9B-F1FDB3BAE74D}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{48CF8992-4161-49D6-9A9B-F1FDB3BAE74D}\ = "UUSEE DeMultiplexer"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{48CF8992-4161-49D6-9A9B-F1FDB3BAE74D}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\UFDeMux.dll"	regsvr32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 3044 wrote to memory of 2928	3044	regsvr32.exe	30
PID 3044 wrote to memory of 2928	3044	regsvr32.exe	30
PID 3044 wrote to memory of 2928	3044	regsvr32.exe	30
PID 3044 wrote to memory of 2928	3044	regsvr32.exe	30
PID 3044 wrote to memory of 2928	3044	regsvr32.exe	30
PID 3044 wrote to memory of 2928	3044	regsvr32.exe	30
PID 3044 wrote to memory of 2928	3044	regsvr32.exe	30

C:\Windows\system32\regsvr32.exe
regsvr32 /s C:\Users\Admin\AppData\Local\Temp\UFDeMux.dll
1⤵
- Suspicious use of WriteProcessMemory
PID:3044
- C:\Windows\SysWOW64\regsvr32.exe
  /s C:\Users\Admin\AppData\Local\Temp\UFDeMux.dll
  2⤵
  - System Location Discovery: System Language Discovery
  - Modifies registry class
  PID:2928

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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