dc4c39f3ce71618813a790ee1d9a732571d058e15e64170ff7598007dac609e7

Analysis

max time kernel
201s
max time network
333s
platform
windows7_x64
resource
win7-20221111-en
resource tags

arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
submitted
04-12-2022 04:35

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General

Target

dc4c39f3ce71618813a790ee1d9a732571d058e15e64170ff7598007dac609e7.dll
Size

1.2MB
MD5

060bb618093684db155e3528315786d5
SHA1

2ae1679e288e4feb300abf8d4deee39c71f5a502
SHA256

dc4c39f3ce71618813a790ee1d9a732571d058e15e64170ff7598007dac609e7
SHA512

913005d2396199aef82402d435172d92c514461363a32fbadbda0a32caf1aa91a1eba6d26841f0cdfaf42d8594e9ac6123be8ae55c26e5d9b8d0a6cc342d3c66
SSDEEP

24576:iMIb0Zy9CbcEfV2jMotMDu0dAGly0vFV72daMHEoe8Bhx:iMm0+C4EBru0uGttV72daMHd1j

Score

7^/10

Malware Config

Signatures

Checks BIOS information in registry 2 TTPs 1 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\SystemBiosVersion	rundll32.exe

Loads dropped DLL 1 IoCs

pid	Process
300	rundll32.exe

Drops file in System32 directory 4 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\hknms.sys	rundll32.exe
File created	C:\Windows\SysWOW64\winio.vxd	rundll32.exe
File created	C:\Windows\SysWOW64\WinIo.dll	rundll32.exe
File created	C:\Windows\SysWOW64\hknms.sys	rundll32.exe

Suspicious behavior: LoadsDriver 1 IoCs

pid	Process
464	Process not Found

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
300	rundll32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 568 wrote to memory of 300	568	rundll32.exe	28
PID 568 wrote to memory of 300	568	rundll32.exe	28
PID 568 wrote to memory of 300	568	rundll32.exe	28
PID 568 wrote to memory of 300	568	rundll32.exe	28
PID 568 wrote to memory of 300	568	rundll32.exe	28
PID 568 wrote to memory of 300	568	rundll32.exe	28
PID 568 wrote to memory of 300	568	rundll32.exe	28

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\dc4c39f3ce71618813a790ee1d9a732571d058e15e64170ff7598007dac609e7.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:568
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\dc4c39f3ce71618813a790ee1d9a732571d058e15e64170ff7598007dac609e7.dll,#1
  2⤵
  - Checks BIOS information in registry
  - Loads dropped DLL
  - Drops file in System32 directory
  - Suspicious use of SetWindowsHookEx
  PID:300

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

\Windows\SysWOW64\WinIo.dll

Filesize
36KB

MD5
b3b6289999a2762c7da8104e5f47f7ee

SHA1
ea3bb66a6de13d86bd40a3005374d4cc9bbb1520

SHA256
73663dff8f7ac6ee85f9a7eeca762b002ee615c03b110e0bb64fc69f7b462565

SHA512
364d476f71df9b881c34687482e8524a23eaa95bfee5b799c98eaf633880e92ee11a1dbdeeddc3f2e00a8b9cddcb937d3f1b126091d65c2cf4f4e87bafd0d6e5

Download Submit
memory/300-54-0x0000000000000000-mapping.dmp

Download
memory/300-55-0x0000000074DA1000-0x0000000074DA3000-memory.dmp

Filesize
8KB

Download
memory/300-56-0x0000000010000000-0x00000000102E7000-memory.dmp

Filesize
2.9MB

Download
memory/300-57-0x0000000010000000-0x00000000102E7000-memory.dmp

Filesize
2.9MB

Download
memory/300-58-0x0000000010000000-0x00000000102E7000-memory.dmp

Filesize
2.9MB

Download
memory/300-59-0x0000000010000000-0x00000000102E7000-memory.dmp

Filesize
2.9MB

Download
memory/300-60-0x0000000010000000-0x00000000102E7000-memory.dmp

Filesize
2.9MB

Download
memory/300-61-0x0000000010000000-0x00000000102E7000-memory.dmp

Filesize
2.9MB

Download
memory/300-63-0x0000000010000000-0x00000000102E7000-memory.dmp

Filesize
2.9MB

Download
memory/300-64-0x0000000010000000-0x00000000102E7000-memory.dmp

Filesize
2.9MB

Download