Analysis

  • max time kernel
    152s
  • max time network
    177s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    11/10/2022, 08:47

General

  • Target

    Purchase Order No.002548.pdf.js

  • Size

    386KB

  • MD5

    8f1ed7462dc08d0897aa79afcf256925

  • SHA1

    cbd38c7cb35f8d5f0afd542dc939dad41806f717

  • SHA256

    6297ad7d2e748eb48b9572a3702188eeb569aad21afc52e0aa813df2294683cb

  • SHA512

    68cc0ca0c833415d3e75d4147bbbb550975622f773dd92e5120e4c8e8907651932eb0367496d2bb43af1fc5d1b1104587d9710df1b3fccfe98dc54c5acda76ce

  • SSDEEP

    6144:SX3RPvIgjpK1By+Z7lgwf0wNLrfoPeQhdREF3Tu:ONISifsekEdu

Malware Config

Extracted

Credentials

  • Protocol:
    smtp
  • Host:
    mail.walkerdaly.co.za
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    0^8CE3Z~WE#4

Signatures

  • AgentTesla

    Agent Tesla is a remote access tool (RAT) written in visual basic.

  • Vjw0rm

    Vjw0rm is a remote access trojan written in JavaScript.

  • Blocklisted process makes network request 6 IoCs
  • Drops file in Drivers directory 1 IoCs
  • Executes dropped EXE 1 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Drops startup file 2 IoCs
  • Reads data files stored by FTP clients 2 TTPs

    Tries to access configuration files associated with programs like FileZilla.

  • Reads user/profile data of local email clients 2 TTPs

    Email clients store some user data on disk where infostealers will often target it.

  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Windows\system32\wscript.exe
    wscript.exe "C:\Users\Admin\AppData\Local\Temp\Purchase Order No.002548.pdf.js"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1840
    • C:\Windows\System32\wscript.exe
      "C:\Windows\System32\wscript.exe" //B "C:\Users\Admin\AppData\Roaming\HnfkCWUlzy.js"
      2⤵
      • Blocklisted process makes network request
      • Drops startup file
      PID:256
    • C:\Users\Admin\AppData\Roaming\DeGrace.exe
      "C:\Users\Admin\AppData\Roaming\DeGrace.exe"
      2⤵
      • Drops file in Drivers directory
      • Executes dropped EXE
      • Accesses Microsoft Outlook profiles
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      • outlook_office_path
      • outlook_win_path
      PID:4560
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 4560 -s 1920
        3⤵
        • Program crash
        PID:5012
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 4560 -s 1920
        3⤵
        • Program crash
        PID:4528
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4560 -ip 4560
    1⤵
      PID:2524

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Roaming\DeGrace.exe

      Filesize

      210KB

      MD5

      a7b2ef440655ae44c0647416f94b0cf5

      SHA1

      d2965894cc58ae8ef26360c08c99dcf08b161af1

      SHA256

      51d922caf11a1956e6b46e55649826692b5226412d643c386dacdbcdc89bd34a

      SHA512

      be962aa707f7597014c762ee822b97162e92ed664bcf2e56d266f501b1f1f077a2f9e9bdf8361cf8df8ceb2d53224fc96c5557af258020da863f725f9ebf34f0

    • C:\Users\Admin\AppData\Roaming\DeGrace.exe

      Filesize

      210KB

      MD5

      a7b2ef440655ae44c0647416f94b0cf5

      SHA1

      d2965894cc58ae8ef26360c08c99dcf08b161af1

      SHA256

      51d922caf11a1956e6b46e55649826692b5226412d643c386dacdbcdc89bd34a

      SHA512

      be962aa707f7597014c762ee822b97162e92ed664bcf2e56d266f501b1f1f077a2f9e9bdf8361cf8df8ceb2d53224fc96c5557af258020da863f725f9ebf34f0

    • C:\Users\Admin\AppData\Roaming\HnfkCWUlzy.js

      Filesize

      5KB

      MD5

      c380d34c94785eed466d83b8945f61b5

      SHA1

      82ddafdfa6559334bb734fdc38de4b09b3a1d7e0

      SHA256

      9b7dbb2f7e53e0b6b6b0a439162aee7683acd0e3cade06e1050762c319b02474

      SHA512

      955d6fd6f747c6af8b0b3638e73dac65ce5676e66daf1c8c572530ba8a52dcd11d176454c8c5293b06a8d102db93250a764a24034bcc44c0ca50bf3e054b8379

    • memory/4560-137-0x0000000000260000-0x000000000029A000-memory.dmp

      Filesize

      232KB

    • memory/4560-138-0x0000000005290000-0x0000000005834000-memory.dmp

      Filesize

      5.6MB

    • memory/4560-139-0x0000000004CE0000-0x0000000004D7C000-memory.dmp

      Filesize

      624KB

    • memory/4560-140-0x0000000005220000-0x0000000005286000-memory.dmp

      Filesize

      408KB

    • memory/4560-141-0x0000000006130000-0x0000000006180000-memory.dmp

      Filesize

      320KB