ad260bd797a4155741b5caf8535a4eae589dc389a810300c2151377c30cb749a

Analysis

max time kernel
140s
max time network
123s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
17/08/2024, 23:12

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General

Target

DSRegVC.dll
Size

1.4MB
MD5

e9680e2271a9cbdb9765ca9f8c9baed8
SHA1

0aa3ebf584613f639fc6e1925e3c1da75ae9e747
SHA256

528d83a72f90872489649422e5505c05f416813d9f4e62c62ccbe3675fb471ef
SHA512

2ebe32836408afe8aa8674189813fe9638b1366f07945ba7c61bd93ef317267638e73a5742fc02c320cd1e0a37b19b1435e858fab209c9ff0cb58e93bcd6d8c7
SSDEEP

24576:pxCuoa2fIlzikiEv9ywoL778jSKvx/pt3Yv2rM331UR0UnHJVXI9g:p42EkiqO778jj1j14Hko

Score

7^/10

discovery

Malware Config

Signatures

Checks BIOS information in registry 2 TTPs 2 IoCs

BIOS information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate	rundll32.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	rundll32.exe

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	rundll32.exe

Modifies registry class 9 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{43CEDDB1-D81D-10F3-B9F8-35D1A9EE202B}\InprocServer32\14.0.0.0\Class = "Microsoft.Office.Interop.Word.ParagraphFormatClass"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{43CEDDB1-D81D-10F3-B9F8-35D1A9EE202B}\InprocServer32\14.0.0.0\RuntimeVersion = "v2.0.50727"	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{43CEDDB1-D81D-10F3-B9F8-35D1A9EE202B}	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{43CEDDB1-D81D-10F3-B9F8-35D1A9EE202B}\InprocServer32\Assembly = "Microsoft.Office.Interop.Word, Version=14.0.0.0, Culture=neutral, PublicKeyToken=71E9BCE111E9429C"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{43CEDDB1-D81D-10F3-B9F8-35D1A9EE202B}\InprocServer32\Class = "Microsoft.Office.Interop.Word.ParagraphFormatClass"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{43CEDDB1-D81D-10F3-B9F8-35D1A9EE202B}\InprocServer32\RuntimeVersion = "v2.0.50727"	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{43CEDDB1-D81D-10F3-B9F8-35D1A9EE202B}\InprocServer32	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{43CEDDB1-D81D-10F3-B9F8-35D1A9EE202B}\InprocServer32\14.0.0.0	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{43CEDDB1-D81D-10F3-B9F8-35D1A9EE202B}\InprocServer32\14.0.0.0\Assembly = "Microsoft.Office.Interop.Word, Version=14.0.0.0, Culture=neutral, PublicKeyToken=71E9BCE111E9429C"	rundll32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 3028 wrote to memory of 3044	3028	rundll32.exe	30
PID 3028 wrote to memory of 3044	3028	rundll32.exe	30
PID 3028 wrote to memory of 3044	3028	rundll32.exe	30
PID 3028 wrote to memory of 3044	3028	rundll32.exe	30
PID 3028 wrote to memory of 3044	3028	rundll32.exe	30
PID 3028 wrote to memory of 3044	3028	rundll32.exe	30
PID 3028 wrote to memory of 3044	3028	rundll32.exe	30

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\DSRegVC.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:3028
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\DSRegVC.dll,#1
  2⤵
  - Checks BIOS information in registry
  - System Location Discovery: System Language Discovery
  - Modifies registry class
  PID:3044

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/3044-0-0x0000000000730000-0x0000000000794000-memory.dmp

Filesize
400KB

Download
memory/3044-5-0x0000000010000000-0x000000001058E000-memory.dmp

Filesize
5.6MB

Download
memory/3044-6-0x0000000010000000-0x000000001058E000-memory.dmp

Filesize
5.6MB

Download
memory/3044-7-0x0000000000730000-0x0000000000794000-memory.dmp

Filesize
400KB

Download