Analysis

  • max time kernel
    138s
  • max time network
    146s
  • platform
    windows7_x64
  • resource
    win7v20201028
  • submitted
    02-02-2021 13:31

General

  • Target

    RE_BOEING3A78_NEW_ORDERS_E4G60K1G7_PDF.js

  • Size

    466KB

  • MD5

    83ef3f626544cef2f0962863ab109634

  • SHA1

    48d5a062ea59ea06afc5334a43f2537390660538

  • SHA256

    5a18ef3e027b211901758fa2ffeaa63ae1ab87cdd85188660ab839771abb9ecb

  • SHA512

    d9f127a33cb2a42b610e3f0e7ad057233e9491a37fc8342f92b216e6f1a3a470e26487bab74cb40209d5c084429db78152ed7266aaa1b56633aa0c6239c591e9

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    ftp
  • Host:
    ftp://ftp.zolvtek.com/
  • Port:
    21
  • Username:
    [email protected]
  • Password:
    bird0006

Signatures

  • AgentTesla

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

  • WSHRAT

    WSHRAT is a variant of Houdini worm and has vbs and js variants.

  • WSHRAT Payload 2 IoCs
  • AgentTesla Payload 3 IoCs
  • Blocklisted process makes network request 7 IoCs
  • Executes dropped EXE 1 IoCs
  • Drops startup file 2 IoCs
  • Loads dropped DLL 1 IoCs
  • Adds Run key to start application 2 TTPs 8 IoCs
  • Looks up external IP address via web service 1 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 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 11 IoCs

Processes

  • C:\Windows\system32\wscript.exe
    wscript.exe C:\Users\Admin\AppData\Local\Temp\RE_BOEING3A78_NEW_ORDERS_E4G60K1G7_PDF.js
    1⤵
    • Drops startup file
    • Adds Run key to start application
    • Suspicious use of WriteProcessMemory
    PID:1676
    • C:\Windows\System32\wscript.exe
      "C:\Windows\System32\wscript.exe" //B "C:\Users\Admin\AppData\Roaming\RE_BOEING3A78_NEW_ORDERS_E4G60K1G7_PDF.js"
      2⤵
      • Blocklisted process makes network request
      • Drops startup file
      • Adds Run key to start application
      • Suspicious use of WriteProcessMemory
      PID:1188
      • C:\Users\Admin\AppData\Roaming\234.exe
        "C:\Users\Admin\AppData\Roaming\234.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:1828
        • C:\Windows\Microsoft.NET\Framework\v2.0.50727\dw20.exe
          dw20.exe -x -s 516
          4⤵
          • Loads dropped DLL
          PID:884

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Roaming\234.exe

    MD5

    a106c2c204a3293e9779659f97626c55

    SHA1

    089369226c1cc2280423238cb9a812a7c07616aa

    SHA256

    7f6602b33eca9d5a407517f106bba38581c8265ff62d65cf29532754f855bdfa

    SHA512

    5c53704a03b089909479b630bca7ed191442dfd26acb39b9089d7f0046098000d1ecb2f50bd36477b6244cfc2016ba34d96c69741e51ab12ffa1c51728cb8252

  • C:\Users\Admin\AppData\Roaming\234.exe

    MD5

    a106c2c204a3293e9779659f97626c55

    SHA1

    089369226c1cc2280423238cb9a812a7c07616aa

    SHA256

    7f6602b33eca9d5a407517f106bba38581c8265ff62d65cf29532754f855bdfa

    SHA512

    5c53704a03b089909479b630bca7ed191442dfd26acb39b9089d7f0046098000d1ecb2f50bd36477b6244cfc2016ba34d96c69741e51ab12ffa1c51728cb8252

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\RE_BOEING3A78_NEW_ORDERS_E4G60K1G7_PDF.js

    MD5

    83ef3f626544cef2f0962863ab109634

    SHA1

    48d5a062ea59ea06afc5334a43f2537390660538

    SHA256

    5a18ef3e027b211901758fa2ffeaa63ae1ab87cdd85188660ab839771abb9ecb

    SHA512

    d9f127a33cb2a42b610e3f0e7ad057233e9491a37fc8342f92b216e6f1a3a470e26487bab74cb40209d5c084429db78152ed7266aaa1b56633aa0c6239c591e9

  • C:\Users\Admin\AppData\Roaming\RE_BOEING3A78_NEW_ORDERS_E4G60K1G7_PDF.js

    MD5

    83ef3f626544cef2f0962863ab109634

    SHA1

    48d5a062ea59ea06afc5334a43f2537390660538

    SHA256

    5a18ef3e027b211901758fa2ffeaa63ae1ab87cdd85188660ab839771abb9ecb

    SHA512

    d9f127a33cb2a42b610e3f0e7ad057233e9491a37fc8342f92b216e6f1a3a470e26487bab74cb40209d5c084429db78152ed7266aaa1b56633aa0c6239c591e9

  • \Users\Admin\AppData\Roaming\234.exe

    MD5

    a106c2c204a3293e9779659f97626c55

    SHA1

    089369226c1cc2280423238cb9a812a7c07616aa

    SHA256

    7f6602b33eca9d5a407517f106bba38581c8265ff62d65cf29532754f855bdfa

    SHA512

    5c53704a03b089909479b630bca7ed191442dfd26acb39b9089d7f0046098000d1ecb2f50bd36477b6244cfc2016ba34d96c69741e51ab12ffa1c51728cb8252

  • memory/884-12-0x0000000000000000-mapping.dmp

  • memory/884-13-0x0000000001E60000-0x0000000001E71000-memory.dmp

    Filesize

    68KB

  • memory/884-16-0x00000000003D0000-0x00000000003D1000-memory.dmp

    Filesize

    4KB

  • memory/1188-2-0x0000000000000000-mapping.dmp

  • memory/1392-10-0x000007FEF6780000-0x000007FEF69FA000-memory.dmp

    Filesize

    2.5MB

  • memory/1676-3-0x0000000002700000-0x0000000002704000-memory.dmp

    Filesize

    16KB

  • memory/1828-6-0x0000000000000000-mapping.dmp

  • memory/1828-9-0x0000000075A41000-0x0000000075A43000-memory.dmp

    Filesize

    8KB

  • memory/1828-11-0x00000000009C0000-0x00000000009C1000-memory.dmp

    Filesize

    4KB