Analysis

  • max time kernel
    142s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220901-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
  • submitted
    18/10/2022, 11:10

General

  • Target

    COAVegum-pdf.js

  • Size

    407KB

  • MD5

    84fc56a0f392b4bdd5051ef094e3a0f7

  • SHA1

    b54064006b82d4627df88aec46f83cd191a5d372

  • SHA256

    bdfeaf2f10c5843da5e7a5b5cfefe48f60cd4754d2a331c8c1dfb5c3a90fb7d1

  • SHA512

    921c602a5955c663fe75248d2a23e7ba0af045a4ed0f619f372298a166c7f6be4992881848b18333ceeb562d25f8c7d36c3ad3915eff030b835617bc8000dcd3

  • SSDEEP

    6144:g+2VMvtkvHZhnXtXx6OnRcvlhnYgltbmZ728U6PcJg2nHpb:WMvtkfZhXtXMOGTndW746EJgyb

Malware Config

Extracted

Credentials

  • Protocol:
    smtp
  • Host:
    server240.web-hosting.com
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    Success4sure2day10@

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
  • 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
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Looks up external IP address via web service 2 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 5 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\COAVegum-pdf.js
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4880
    • C:\Windows\System32\wscript.exe
      "C:\Windows\System32\wscript.exe" //B "C:\Users\Admin\AppData\Roaming\WfPDtvsdEF.js"
      2⤵
      • Blocklisted process makes network request
      • Drops startup file
      PID:3140
    • C:\Users\Admin\AppData\Local\Temp\anew4FUDcrypt.exe
      "C:\Users\Admin\AppData\Local\Temp\anew4FUDcrypt.exe"
      2⤵
      • Executes dropped EXE
      • Accesses Microsoft Outlook profiles
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • outlook_office_path
      • outlook_win_path
      PID:3084

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\anew4FUDcrypt.exe

    Filesize

    218KB

    MD5

    d38c08505b96562261c3920265bb4f97

    SHA1

    7b7bb2838e3e04d412fdde726b351ac0a6eaba80

    SHA256

    83a0e9ffbf7ec5895ec2062597c34e6e88cc48a608896e2722b78677e2e04ea9

    SHA512

    9eac7bb3dac64db0aa5c90d6609545fb1b2c07b7721c01046db11742e4097e9c6b842dadd9e97627e6f9df73abe98494e2616467a339051fc9cf8fc00df0b4d8

  • C:\Users\Admin\AppData\Local\Temp\anew4FUDcrypt.exe

    Filesize

    218KB

    MD5

    d38c08505b96562261c3920265bb4f97

    SHA1

    7b7bb2838e3e04d412fdde726b351ac0a6eaba80

    SHA256

    83a0e9ffbf7ec5895ec2062597c34e6e88cc48a608896e2722b78677e2e04ea9

    SHA512

    9eac7bb3dac64db0aa5c90d6609545fb1b2c07b7721c01046db11742e4097e9c6b842dadd9e97627e6f9df73abe98494e2616467a339051fc9cf8fc00df0b4d8

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

    Filesize

    7KB

    MD5

    e2f132785fa07b0d29a5e94676f06e0b

    SHA1

    6e8cd782c173a0b145d68a16952e7aa3a5bc26a1

    SHA256

    844966b61c3a7065a8b313ad25d65dd05ee4440c4b1f609fd0d175c926ce8d85

    SHA512

    88ad1be03af8ecb549008e095c219848dec04398352fd1c8e7d6e706dbb9642f07fc87b326c56c288a93bc451512f60f8c8f6b250ea1609aa47e02831586dd57

  • memory/3084-137-0x0000000000320000-0x000000000035C000-memory.dmp

    Filesize

    240KB

  • memory/3084-138-0x00000000052F0000-0x0000000005894000-memory.dmp

    Filesize

    5.6MB

  • memory/3084-139-0x0000000004D40000-0x0000000004DDC000-memory.dmp

    Filesize

    624KB

  • memory/3084-140-0x00000000059E0000-0x0000000005A46000-memory.dmp

    Filesize

    408KB

  • memory/3084-141-0x00000000065E0000-0x0000000006630000-memory.dmp

    Filesize

    320KB

  • memory/3084-142-0x00000000067D0000-0x0000000006862000-memory.dmp

    Filesize

    584KB

  • memory/3084-143-0x0000000006900000-0x000000000690A000-memory.dmp

    Filesize

    40KB