Analysis

  • max time kernel
    135s
  • max time network
    47s
  • platform
    windows7_x64
  • resource
    win7-20220414-en
  • submitted
    21-05-2022 11:59

General

  • Target

    shipping documents.PDF.exe

  • Size

    433KB

  • MD5

    9bc66f36baedd02eb6b55e391d90b324

  • SHA1

    aaa6786ed70237361fb28250da350181d0fd28fe

  • SHA256

    4b1a13f1b1a0bff19df63d1ebf93a2c1c390896b77db3b724a2e5c03f6007d81

  • SHA512

    027dbf3d56939ad0d7f4bae865863e9da23d3be4278b2e7a257b8c08b135390322b298c4bece43cda407c6eeec07c4f41a5d5b72bcee4018c65b6530aa3f462e

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    mail.microtechlab.in
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    pune@123

Signatures

  • AgentTesla

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

  • AgentTesla Payload 6 IoCs
  • ReZer0 packer 1 IoCs

    Detects ReZer0, a packer with multiple versions used in various campaigns.

  • Disables Task Manager via registry modification
  • Drops file in Drivers directory 1 IoCs
  • Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
  • Adds Run key to start application 2 TTPs 1 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.

  • Modifies registry key 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 5 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 24 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\shipping documents.PDF.exe
    "C:\Users\Admin\AppData\Local\Temp\shipping documents.PDF.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1460
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\myhqZugPIlg" /XML "C:\Users\Admin\AppData\Local\Temp\tmpEE08.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:1996
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
      "{path}"
      2⤵
      • Drops file in Drivers directory
      • Accesses Microsoft Outlook profiles
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      • outlook_office_path
      • outlook_win_path
      PID:1960
      • C:\Windows\SysWOW64\REG.exe
        REG add HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System /v DisableTaskMgr /t REG_DWORD /d 1 /f
        3⤵
        • Modifies registry key
        PID:1812
      • C:\Windows\SysWOW64\netsh.exe
        "netsh" wlan show profile
        3⤵
          PID:1752

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Execution

    Scheduled Task

    1
    T1053

    Persistence

    Registry Run Keys / Startup Folder

    1
    T1060

    Scheduled Task

    1
    T1053

    Privilege Escalation

    Scheduled Task

    1
    T1053

    Defense Evasion

    Modify Registry

    2
    T1112

    Discovery

    System Information Discovery

    1
    T1082

    Collection

    Email Collection

    1
    T1114

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Temp\tmpEE08.tmp
      Filesize

      1KB

      MD5

      b946dbd1a3eff669ac965e7754ef1160

      SHA1

      5409a28fe0b554d94d322b9dc2d28edbda96dd45

      SHA256

      c39062aa15c78d8da3fb60bb18bdaeb5384414c58e17731c3a6a1ec01535f1b1

      SHA512

      f37356fa70978b5985020e11bb032b792a42b7d7af56662656362e37ab8040f2bc7b660de2d8109730b777aeb007554bce49670c58e432052f1a5c0c2d331c86

    • memory/1460-54-0x0000000001220000-0x0000000001292000-memory.dmp
      Filesize

      456KB

    • memory/1460-55-0x0000000000370000-0x0000000000378000-memory.dmp
      Filesize

      32KB

    • memory/1460-56-0x0000000000A10000-0x0000000000A68000-memory.dmp
      Filesize

      352KB

    • memory/1460-57-0x00000000763E1000-0x00000000763E3000-memory.dmp
      Filesize

      8KB

    • memory/1752-73-0x0000000000000000-mapping.dmp
    • memory/1812-72-0x0000000000000000-mapping.dmp
    • memory/1960-68-0x0000000000400000-0x0000000000452000-memory.dmp
      Filesize

      328KB

    • memory/1960-63-0x0000000000400000-0x0000000000452000-memory.dmp
      Filesize

      328KB

    • memory/1960-64-0x0000000000400000-0x0000000000452000-memory.dmp
      Filesize

      328KB

    • memory/1960-65-0x0000000000400000-0x0000000000452000-memory.dmp
      Filesize

      328KB

    • memory/1960-66-0x000000000044CF5E-mapping.dmp
    • memory/1960-61-0x0000000000400000-0x0000000000452000-memory.dmp
      Filesize

      328KB

    • memory/1960-70-0x0000000000400000-0x0000000000452000-memory.dmp
      Filesize

      328KB

    • memory/1960-60-0x0000000000400000-0x0000000000452000-memory.dmp
      Filesize

      328KB

    • memory/1996-58-0x0000000000000000-mapping.dmp