c01c0bce2f0088ebdd2f006b207ab1a2e033c455c59fc21b4e8bffcd2fd20077

Analysis

max time kernel
95s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
08/09/2024, 02:15

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General

Target

UFDeMux.dll
Size

165KB
MD5

3a7bddb7abe9f7e577cce004afe4a88c
SHA1

090eafea7e3ef051bd34af89f12891bb04b7e3f2
SHA256

5a45f869b86006ca9b0e57be9f0ee8898cb22a25f09cdf2d457f377fbd9939ef
SHA512

f9b4606e4ea7d25dc528ca0e9372d66c35de05876efafddea12d62f37b5e829c357b07c7c590d21c6da14fc9783f649ac3338d9868bfb7d145c7fed1606274c7
SSDEEP

3072:+m6ZUWxvkj1eQ5afND5WxHR07RvZjpWPGMw7tcmardfA:+mGw1uoR6h2bwimaRfA

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 (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
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\{48CF8992-4161-49D6-9A9B-F1FDB3BAE74D}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\UFDeMux.dll"	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
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Media Type\{E436EB83-524F-11CE-9F53-0020AF0BA770}\{F070A0E8-B213-47E4-8991-252AC82EE6A1}	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
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 (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Media Type\Extensions\.ucf\Source Filter = "{E436EBB5-524F-11CE-9F53-0020AF0BA770}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Media Type\Extensions\.ucf\Subtype = "{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\{E436EB83-524F-11CE-9F53-0020AF0BA770}\{F070A0E8-B213-47E4-8991-252AC82EE6A1}\0 = "0,4,,46494c45"	regsvr32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 5020 wrote to memory of 4428	5020	regsvr32.exe	84
PID 5020 wrote to memory of 4428	5020	regsvr32.exe	84
PID 5020 wrote to memory of 4428	5020	regsvr32.exe	84

C:\Windows\system32\regsvr32.exe
regsvr32 /s C:\Users\Admin\AppData\Local\Temp\UFDeMux.dll
1⤵
- Suspicious use of WriteProcessMemory
PID:5020
- 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:4428

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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