8ffc036085a9e465fa52366aa43cd2a862c2a78c145425338dcca3db2f3158f4

Analysis

max time kernel
121s
max time network
125s
platform
windows7_x64
resource
win7-20240704-en
resource tags

arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-x64system
submitted
21-08-2024 12:42

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General

Target

$SYSDIR/avisynth.dll
Size

306KB
MD5

8f43ae82ec175236a1249c30fab4ee5c
SHA1

987b8f59470c7cecc393677bd9c9b3b41ea3d848
SHA256

1d214e20ea6feea336e370c3d4b5b4dc0483db396219e56d740de45dff32cf95
SHA512

eeac3d6827e8ef7ee830c04c035c8f14e8ed90a5885aa3345302e2e04442d39916d9d401d6b2293b4454b20dc46f8ef5dc5c64fb8e02e2914a1799e4c248bb62
SSDEEP

6144:nGbn0kVJDMDQ+jnCBGxnA8E97pkwpDUs3xnkpQk:Gb0FDbC98A7pD9Ushnf

Score

7^/10

discovery upx

Malware Config

Signatures

UPX packed file 3 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral21/memory/2804-0-0x0000000010000000-0x000000001010B000-memory.dmp	upx
behavioral21/memory/2804-4-0x0000000010000000-0x000000001010B000-memory.dmp	upx
behavioral21/memory/2804-3-0x0000000010000000-0x000000001010B000-memory.dmp	upx

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

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 2828 wrote to memory of 2804	2828	rundll32.exe	30
PID 2828 wrote to memory of 2804	2828	rundll32.exe	30
PID 2828 wrote to memory of 2804	2828	rundll32.exe	30
PID 2828 wrote to memory of 2804	2828	rundll32.exe	30
PID 2828 wrote to memory of 2804	2828	rundll32.exe	30
PID 2828 wrote to memory of 2804	2828	rundll32.exe	30
PID 2828 wrote to memory of 2804	2828	rundll32.exe	30

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\$SYSDIR\avisynth.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2828
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\$SYSDIR\avisynth.dll,#1
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2804

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

Replay Monitor

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Downloads

memory/2804-0-0x0000000010000000-0x000000001010B000-memory.dmp

Filesize
1.0MB

Download
memory/2804-1-0x0000000002000000-0x0000000002167000-memory.dmp

Filesize
1.4MB

Download
memory/2804-4-0x0000000010000000-0x000000001010B000-memory.dmp

Filesize
1.0MB

Download
memory/2804-3-0x0000000010000000-0x000000001010B000-memory.dmp

Filesize
1.0MB

Download