Analysis

  • max time kernel
    105s
  • max time network
    46s
  • platform
    windows7_x64
  • resource
    win7-20220414-en
  • submitted
    20-05-2022 22:52

General

  • Target

    Tender document.exe

  • Size

    428KB

  • MD5

    7c2a3303f5a74db2dbc52700021c7b85

  • SHA1

    47d8cfab45c62c74f6a37a0ba1eee131139572dd

  • SHA256

    eee59729c83333c9d3b5a7b446a076551d1d564e65d24cb73dbc14e3469338e2

  • SHA512

    12629cde9440830221c9bdfa19efd3d1e0203e92b9aff04346798a20c9f62cd22124cc036420679e30968be54508bdb3628bc598b2f0211eb1268d9caa021ad9

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    mail.plazaplus.com.my
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    adminplazaplus

Signatures

  • AgentTesla

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

  • AgentTesla Payload 6 IoCs
  • 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
  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 17 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Tender document.exe
    "C:\Users\Admin\AppData\Local\Temp\Tender document.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1372
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\IehQzBaIZ" /XML "C:\Users\Admin\AppData\Local\Temp\tmp4673.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:1676
    • C:\Users\Admin\AppData\Local\Temp\Tender document.exe
      "{path}"
      2⤵
        PID:1664
      • C:\Users\Admin\AppData\Local\Temp\Tender document.exe
        "{path}"
        2⤵
        • Accesses Microsoft Outlook profiles
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • outlook_office_path
        • outlook_win_path
        PID:2000

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Temp\tmp4673.tmp

      Filesize

      1KB

      MD5

      1f2b5572d4afedac7a4058efec9b9df1

      SHA1

      eb1039a74c86770352efcfa8144d61403144a48a

      SHA256

      42617781853ef8a239a14daed11d9815c940963e2f77f82da837627c2b43238f

      SHA512

      695e412a9ca8441d5cc61ec087bf9afd12ccb51fa184936974d2428a9420be3294545d7f3ced27aa1838ccc5ac14f67c670e8ccd377c0c77fe298455f51277ff

    • memory/1372-54-0x00000000763E1000-0x00000000763E3000-memory.dmp

      Filesize

      8KB

    • memory/1372-55-0x0000000074980000-0x0000000074F2B000-memory.dmp

      Filesize

      5.7MB

    • memory/1676-56-0x0000000000000000-mapping.dmp

    • memory/2000-62-0x0000000000400000-0x000000000044C000-memory.dmp

      Filesize

      304KB

    • memory/2000-59-0x0000000000400000-0x000000000044C000-memory.dmp

      Filesize

      304KB

    • memory/2000-58-0x0000000000400000-0x000000000044C000-memory.dmp

      Filesize

      304KB

    • memory/2000-61-0x0000000000400000-0x000000000044C000-memory.dmp

      Filesize

      304KB

    • memory/2000-63-0x0000000000400000-0x000000000044C000-memory.dmp

      Filesize

      304KB

    • memory/2000-64-0x0000000000446C9E-mapping.dmp

    • memory/2000-68-0x0000000000400000-0x000000000044C000-memory.dmp

      Filesize

      304KB

    • memory/2000-66-0x0000000000400000-0x000000000044C000-memory.dmp

      Filesize

      304KB

    • memory/2000-70-0x0000000074910000-0x0000000074EBB000-memory.dmp

      Filesize

      5.7MB