Analysis

  • max time kernel
    94s
  • max time network
    113s
  • platform
    windows10_x64
  • resource
    win10v20210410
  • submitted
    17-04-2021 11:46

General

  • Target

    Items Needed.exe

  • Size

    28KB

  • MD5

    75b25644240fbdecc8e60f097c93a6ef

  • SHA1

    c32bf2a40047abf6b4a144e7a8d6e6d1b45afb88

  • SHA256

    4988d73d2134785c5c09a123189e395d6637112537bc37a25aeb9c0cb6a21973

  • SHA512

    4555d57fad07b178d655ccc9a52fa9bbfd405d82a74f2429b5178de7af201fc81360fcd764ff886b80a03ff78abb0f5ea9e54891fd32e84096dac9ef6b606f37

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    webmail.jumatsedekah.com
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    YV1i#[N*@-6-

Signatures

  • AgentTesla

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

  • AgentTesla Payload 3 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.

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 17 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.

  • Program crash 1 IoCs
  • Delays execution with timeout.exe 1 IoCs
  • Modifies system certificate store 2 TTPs 4 IoCs
  • Suspicious behavior: EnumeratesProcesses 7 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 17 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Items Needed.exe
    "C:\Users\Admin\AppData\Local\Temp\Items Needed.exe"
    1⤵
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Suspicious use of SetThreadContext
    • Modifies system certificate store
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3484
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c timeout 1
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:196
      • C:\Windows\SysWOW64\timeout.exe
        timeout 1
        3⤵
        • Delays execution with timeout.exe
        PID:936
    • C:\Users\Admin\AppData\Local\Temp\Items Needed.exe
      "C:\Users\Admin\AppData\Local\Temp\Items Needed.exe"
      2⤵
        PID:3756
      • C:\Users\Admin\AppData\Local\Temp\Items Needed.exe
        "C:\Users\Admin\AppData\Local\Temp\Items Needed.exe"
        2⤵
        • Adds Run key to start application
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of SetWindowsHookEx
        PID:3760
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 3484 -s 2512
        2⤵
        • Program crash
        PID:3924

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Persistence

    Registry Run Keys / Startup Folder

    1
    T1060

    Defense Evasion

    Modify Registry

    2
    T1112

    Install Root Certificate

    1
    T1130

    Credential Access

    Credentials in Files

    3
    T1081

    Discovery

    System Information Discovery

    1
    T1082

    Collection

    Data from Local System

    3
    T1005

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • memory/196-120-0x0000000000000000-mapping.dmp
    • memory/936-121-0x0000000000000000-mapping.dmp
    • memory/3484-118-0x0000000006550000-0x0000000006551000-memory.dmp
      Filesize

      4KB

    • memory/3484-114-0x00000000006B0000-0x00000000006B1000-memory.dmp
      Filesize

      4KB

    • memory/3484-119-0x0000000004AB0000-0x0000000004B04000-memory.dmp
      Filesize

      336KB

    • memory/3484-117-0x0000000005FA0000-0x0000000005FA1000-memory.dmp
      Filesize

      4KB

    • memory/3484-116-0x0000000005010000-0x0000000005011000-memory.dmp
      Filesize

      4KB

    • memory/3760-122-0x0000000000400000-0x000000000043C000-memory.dmp
      Filesize

      240KB

    • memory/3760-123-0x00000000004374BE-mapping.dmp
    • memory/3760-128-0x0000000004C10000-0x000000000510E000-memory.dmp
      Filesize

      5.0MB

    • memory/3760-129-0x00000000050D0000-0x00000000050D1000-memory.dmp
      Filesize

      4KB

    • memory/3760-130-0x0000000005970000-0x0000000005971000-memory.dmp
      Filesize

      4KB

    • memory/3760-131-0x0000000005D60000-0x0000000005D61000-memory.dmp
      Filesize

      4KB

    • memory/3760-132-0x0000000004BB0000-0x0000000004BB1000-memory.dmp
      Filesize

      4KB