8348f852775f70444139d4f2cf42fb6fedca972ff91c48eaed56739c840a75d4

Analysis

max time kernel
119s
max time network
121s
platform
windows7_x64
resource
win7-20240704-en
resource tags

arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-x64system
submitted
25/07/2024, 11:31

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General

Target

wrapper.dll
Size

655KB
MD5

e1656d25f53820e291e60093f8e8bc41
SHA1

1407ef55c30de78b3b5f3e4a0042281ae9d55831
SHA256

367fda11631296caef0acad26cfed7d0934475eacb8349c1c209a575bf547cb8
SHA512

5407d8605a1405759f824e10bd748671d057eb477b8feed5772e62fa55f67df10ed643a7a7f90562db3782461291b61b452d679453888d065e0c8bafb8791e7f
SSDEEP

12288:3lTILolEZuvuVJBK9ONOkx2PAUv0vWPdcef6WKqC1bBTzBS0ncQ:3lTI9nhOkUIM0qNf6WKNJB1cQ

Score

7^/10

bootkit discovery persistence upx

Malware Config

Signatures

UPX packed file 2 IoCs

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

upx

resource	yara_rule
behavioral27/memory/772-1-0x0000000002070000-0x0000000002229000-memory.dmp	upx
behavioral27/memory/772-9-0x0000000002070000-0x0000000002229000-memory.dmp	upx

Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs

Bootkits write to the MBR to gain persistence at a level below the operating system.

bootkit persistence

Bootkit

T1542.003

description	ioc	Process
File opened for modification	\??\PhysicalDrive0	rundll32.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
992	772	WerFault.exe	30

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 3 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.key\	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.key\ = "regfile"	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.key	rundll32.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 1580 wrote to memory of 772	1580	rundll32.exe	30
PID 1580 wrote to memory of 772	1580	rundll32.exe	30
PID 1580 wrote to memory of 772	1580	rundll32.exe	30
PID 1580 wrote to memory of 772	1580	rundll32.exe	30
PID 1580 wrote to memory of 772	1580	rundll32.exe	30
PID 1580 wrote to memory of 772	1580	rundll32.exe	30
PID 1580 wrote to memory of 772	1580	rundll32.exe	30
PID 772 wrote to memory of 992	772	rundll32.exe	31
PID 772 wrote to memory of 992	772	rundll32.exe	31
PID 772 wrote to memory of 992	772	rundll32.exe	31
PID 772 wrote to memory of 992	772	rundll32.exe	31

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\wrapper.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1580
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\wrapper.dll,#1
  2⤵
  - Writes to the Master Boot Record (MBR)
  - System Location Discovery: System Language Discovery
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:772
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 772 -s 280
    3⤵
    - Program crash
    PID:992

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Pre-OS Boot

T1542

Bootkit

T1542.003

Privilege Escalation

Defense Evasion

Pre-OS Boot

T1542

Bootkit

T1542.003

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/772-0-0x0000000010000000-0x000000001017D000-memory.dmp

Filesize
1.5MB

Download
memory/772-1-0x0000000002070000-0x0000000002229000-memory.dmp

Filesize
1.7MB

Download
memory/772-3-0x0000000010000000-0x000000001017D000-memory.dmp

Filesize
1.5MB

Download
memory/772-2-0x0000000010153000-0x0000000010154000-memory.dmp

Filesize
4KB

Download
memory/772-4-0x0000000010000000-0x000000001017D000-memory.dmp

Filesize
1.5MB

Download
memory/772-6-0x0000000010000000-0x000000001017D000-memory.dmp

Filesize
1.5MB

Download
memory/772-7-0x0000000010000000-0x000000001017D000-memory.dmp

Filesize
1.5MB

Download
memory/772-5-0x0000000010000000-0x000000001017D000-memory.dmp

Filesize
1.5MB

Download
memory/772-9-0x0000000002070000-0x0000000002229000-memory.dmp

Filesize
1.7MB

Download
memory/772-10-0x0000000010153000-0x0000000010154000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads