b54acfe94e3126a7a74935f4482e36513b3e6933af09a69a15dba8a7f4db4458

Analysis

max time kernel
121s
max time network
123s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
03-12-2024 11:42

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General

Target

yiivdk.exe
Size

1.3MB
MD5

22ee58313edbd477e6a1ed76a1f9218f
SHA1

f22e39af8b06e1c471138c820e59bb2abcb15a01
SHA256

b54acfe94e3126a7a74935f4482e36513b3e6933af09a69a15dba8a7f4db4458
SHA512

12c5ccb66a32a666c2a375ca74d02b10e19b872087738739d58d43c81dd00685b3731888e5b375b398a381e7aa82c25066fff430850caa38a9af5736833ffa01
SSDEEP

24576:C2YbBZNbCLvA8pHmGguYNBcR80G9Ps6IZWtu7vSvmgJC9KicB7yd:C2YbBZNuDtm1uKBE80G9bIYtu7qmgJCQ

Score

7^/10

discovery

Malware Config

Signatures

Drops startup file 1 IoCs

Processes:

yiivdk.exe

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ByteLength.vbs	yiivdk.exe

Program crash 1 IoCs

Processes:

WerFault.exe

pid	pid_target	Process	procid_target
4040	2236	WerFault.exe	29

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

Processes:

yiivdk.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	yiivdk.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

yiivdk.exe

pid	Process
2236	yiivdk.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

yiivdk.exe

description	pid	Process
Token: SeDebugPrivilege	2236	yiivdk.exe
Token: SeDebugPrivilege	2236	yiivdk.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

yiivdk.exe

description	pid	Process	procid_target
PID 2236 wrote to memory of 4040	2236	yiivdk.exe	31
PID 2236 wrote to memory of 4040	2236	yiivdk.exe	31
PID 2236 wrote to memory of 4040	2236	yiivdk.exe	31
PID 2236 wrote to memory of 4040	2236	yiivdk.exe	31

C:\Users\Admin\AppData\Local\Temp\yiivdk.exe
"C:\Users\Admin\AppData\Local\Temp\yiivdk.exe"
1⤵
- Drops startup file
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2236
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2236 -s 656
  2⤵
  - Program crash
  PID:4040

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/2236-0-0x000000007453E000-0x000000007453F000-memory.dmp

Filesize
4KB

Download
memory/2236-1-0x00000000008E0000-0x0000000000A30000-memory.dmp

Filesize
1.3MB

Download
memory/2236-2-0x0000000074530000-0x0000000074C1E000-memory.dmp

Filesize
6.9MB

Download
memory/2236-3-0x0000000004D40000-0x0000000004E64000-memory.dmp

Filesize
1.1MB

Download
memory/2236-4-0x0000000004FD0000-0x00000000050F6000-memory.dmp

Filesize
1.1MB

Download
memory/2236-5-0x0000000004FD0000-0x00000000050EF000-memory.dmp

Filesize
1.1MB

Download
memory/2236-6-0x0000000004FD0000-0x00000000050EF000-memory.dmp

Filesize
1.1MB

Download
memory/2236-42-0x0000000004FD0000-0x00000000050EF000-memory.dmp

Filesize
1.1MB

Download
memory/2236-64-0x0000000004FD0000-0x00000000050EF000-memory.dmp

Filesize
1.1MB

Download
memory/2236-8-0x0000000004FD0000-0x00000000050EF000-memory.dmp

Filesize
1.1MB

Download
memory/2236-10-0x0000000004FD0000-0x00000000050EF000-memory.dmp

Filesize
1.1MB

Download
memory/2236-14-0x0000000004FD0000-0x00000000050EF000-memory.dmp

Filesize
1.1MB

Download
memory/2236-26-0x0000000004FD0000-0x00000000050EF000-memory.dmp

Filesize
1.1MB

Download
memory/2236-54-0x0000000004FD0000-0x00000000050EF000-memory.dmp

Filesize
1.1MB

Download
memory/2236-68-0x0000000004FD0000-0x00000000050EF000-memory.dmp

Filesize
1.1MB

Download
memory/2236-66-0x0000000004FD0000-0x00000000050EF000-memory.dmp

Filesize
1.1MB

Download
memory/2236-62-0x0000000004FD0000-0x00000000050EF000-memory.dmp

Filesize
1.1MB

Download
memory/2236-60-0x0000000004FD0000-0x00000000050EF000-memory.dmp

Filesize
1.1MB

Download
memory/2236-58-0x0000000004FD0000-0x00000000050EF000-memory.dmp

Filesize
1.1MB

Download
memory/2236-56-0x0000000004FD0000-0x00000000050EF000-memory.dmp

Filesize
1.1MB

Download
memory/2236-52-0x0000000004FD0000-0x00000000050EF000-memory.dmp

Filesize
1.1MB

Download
memory/2236-50-0x0000000004FD0000-0x00000000050EF000-memory.dmp

Filesize
1.1MB

Download
memory/2236-48-0x0000000004FD0000-0x00000000050EF000-memory.dmp

Filesize
1.1MB

Download
memory/2236-46-0x0000000004FD0000-0x00000000050EF000-memory.dmp

Filesize
1.1MB

Download
memory/2236-44-0x0000000004FD0000-0x00000000050EF000-memory.dmp

Filesize
1.1MB

Download
memory/2236-40-0x0000000004FD0000-0x00000000050EF000-memory.dmp

Filesize
1.1MB

Download
memory/2236-38-0x0000000004FD0000-0x00000000050EF000-memory.dmp

Filesize
1.1MB

Download
memory/2236-36-0x0000000004FD0000-0x00000000050EF000-memory.dmp

Filesize
1.1MB

Download
memory/2236-34-0x0000000004FD0000-0x00000000050EF000-memory.dmp

Filesize
1.1MB

Download
memory/2236-32-0x0000000004FD0000-0x00000000050EF000-memory.dmp

Filesize
1.1MB

Download
memory/2236-30-0x0000000004FD0000-0x00000000050EF000-memory.dmp

Filesize
1.1MB

Download
memory/2236-28-0x0000000004FD0000-0x00000000050EF000-memory.dmp

Filesize
1.1MB

Download
memory/2236-24-0x0000000004FD0000-0x00000000050EF000-memory.dmp

Filesize
1.1MB

Download
memory/2236-22-0x0000000004FD0000-0x00000000050EF000-memory.dmp

Filesize
1.1MB

Download
memory/2236-20-0x0000000004FD0000-0x00000000050EF000-memory.dmp

Filesize
1.1MB

Download
memory/2236-18-0x0000000004FD0000-0x00000000050EF000-memory.dmp

Filesize
1.1MB

Download
memory/2236-16-0x0000000004FD0000-0x00000000050EF000-memory.dmp

Filesize
1.1MB

Download
memory/2236-12-0x0000000004FD0000-0x00000000050EF000-memory.dmp

Filesize
1.1MB

Download
memory/2236-1182-0x0000000002060000-0x00000000020AC000-memory.dmp

Filesize
304KB

Download
memory/2236-1183-0x0000000004340000-0x0000000004394000-memory.dmp

Filesize
336KB

Download
memory/2236-1181-0x0000000004980000-0x0000000004A16000-memory.dmp

Filesize
600KB

Download
memory/2236-1185-0x0000000074530000-0x0000000074C1E000-memory.dmp

Filesize
6.9MB

Download
memory/2236-1187-0x0000000074530000-0x0000000074C1E000-memory.dmp

Filesize
6.9MB

Download