Overview

overview

10

Static

static

Attachment.jpg.lnk

windows7_x64

3

Attachment.jpg.lnk

windows10_x64

8

z.ps1

windows7_x64

10

z.ps1

windows10_x64

8

Analysis

  • max time kernel
    121s
  • max time network
    124s
  • platform
    windows7_x64
  • resource
    win7-en-20210920
  • submitted
    19-10-2021 14:45

Sharing

Copy URL
Twitter E-mail
Report Analysis Logs

General

  • Target

    z.ps1

  • Size

    885KB

  • MD5

    f5823f4078ed9420c7a716cb61f8ba6c

  • SHA1

    5a4fefe3e37b29ec3065a2f80300ab9d79d3e68d

  • SHA256

    8004875f540cbaf1fe2d3844a66c67bbf4b885dd592450c9a5f420fbca0f044d

  • SHA512

    aab8d42e87e97600ec958d747f75c82899cd82fd2b63b538b8bbc59867ad26a09db3c8fb156d4a7b1e143a4042997d3324662715d6ed8c2eab0211efe03251bd

Score
10/10
doublebackbackdoor

Malware Config

Signatures

  • DoubleBack

    DoubleBack is a modular backdoor first seen in December 2020.

    backdoordoubleback
  • DoubleBack x64 Payload 2 IoCs
  • Blocklisted process makes network request 5 IoCs
  • Deletes itself 1 IoCs
  • Modifies registry class 23 IoCs
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious behavior: MapViewOfSection 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\z.ps1
    1⤵
    • Blocklisted process makes network request
    • Modifies registry class
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious behavior: MapViewOfSection
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1556
    • C:\Windows\system32\msiexec.exe
      C:\Windows\system32\msiexec.exe
      2⤵
      • Blocklisted process makes network request
      • Deletes itself
      • Modifies registry class
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:1560
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        powershell -c "&{$v1='0577';$k1='hkcu:\Software\Classes\CLSID';$p1=(gp $k1).$v1;rp $k1 $v1;set-itemproperty -pat $k1 -n $v1 -va (($p1|iex)|out-string);exit}"
        3⤵
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:896

Network

MITRE ATT&CK Matrix

Replay Monitor

Loading Replay Monitor...

Downloads

  • memory/896-70-0x000000000227B000-0x000000000229A000-memory.dmp

    Filesize

    124KB

    Download

  • memory/896-69-0x0000000002274000-0x0000000002277000-memory.dmp

    Filesize

    12KB

    Download

  • memory/896-68-0x0000000002272000-0x0000000002274000-memory.dmp

    Filesize

    8KB

    Download

  • memory/896-67-0x0000000002270000-0x0000000002272000-memory.dmp

    Filesize

    8KB

    Download

  • memory/896-66-0x000007FEEED40000-0x000007FEEF89D000-memory.dmp

    Filesize

    11.4MB

    Download

  • memory/1556-56-0x000007FEF24A0000-0x000007FEF2FFD000-memory.dmp

    Filesize

    11.4MB

    Download

  • memory/1556-62-0x0000008800000000-0x000000880000D000-memory.dmp

    Filesize

    52KB

    Download

  • memory/1556-61-0x000000001BA20000-0x000000001BA2A000-memory.dmp

    Filesize

    40KB

    Download

  • memory/1556-60-0x000000001BA60000-0x000000001BA79000-memory.dmp

    Filesize

    100KB

    Download

  • memory/1556-59-0x000000000251B000-0x000000000253A000-memory.dmp

    Filesize

    124KB

    Download

  • memory/1556-54-0x000007FEFB951000-0x000007FEFB953000-memory.dmp

    Filesize

    8KB

    Download

  • memory/1556-57-0x0000000002514000-0x0000000002517000-memory.dmp

    Filesize

    12KB

    Download

  • memory/1556-58-0x0000000002512000-0x0000000002514000-memory.dmp

    Filesize

    8KB

    Download

  • memory/1556-55-0x0000000002510000-0x0000000002512000-memory.dmp

    Filesize

    8KB

    Download