Analysis

  • max time kernel
    125s
  • max time network
    107s
  • platform
    windows10_x64
  • resource
    win10v20201028
  • submitted
    29-01-2021 14:38

General

  • Target

    sUYjLDLnEi6Pv5y.exe

  • Size

    702KB

  • MD5

    541f21ea9b009eb8305113b63a4f65f0

  • SHA1

    39919825256e0d59958c51c22a99f7217498e42c

  • SHA256

    b7ca7cb881d15414b022a7c568bfaf861a0be5c404fa800cd6549dc5819c6d0a

  • SHA512

    4ab45d4e8858c30c01243435b1798349d75ec5b48939966e4b896d8d9e2ead468a04e953727f1ead1bfd81c9095c3e79f7dd2a12bb8db971b4b656fc8388bbad

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    smtp.yatchbabara.com
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    j$Mk$NE7

Signatures

  • AgentTesla

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

  • AgentTesla Payload 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.

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 5 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 11 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\sUYjLDLnEi6Pv5y.exe
    "C:\Users\Admin\AppData\Local\Temp\sUYjLDLnEi6Pv5y.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1056
    • C:\Users\Admin\AppData\Local\Temp\sUYjLDLnEi6Pv5y.exe
      "{path}"
      2⤵
        PID:1020
      • C:\Users\Admin\AppData\Local\Temp\sUYjLDLnEi6Pv5y.exe
        "{path}"
        2⤵
        • Adds Run key to start application
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of SetWindowsHookEx
        PID:2416

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Persistence

    Registry Run Keys / Startup Folder

    1
    T1060

    Defense Evasion

    Modify Registry

    1
    T1112

    Credential Access

    Credentials in Files

    3
    T1081

    Collection

    Data from Local System

    3
    T1005

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\sUYjLDLnEi6Pv5y.exe.log
      MD5

      0c2899d7c6746f42d5bbe088c777f94c

      SHA1

      622f66c5f7a3c91b28a9f43ce7c6cabadbf514f1

      SHA256

      5b0b99740cadaeff7b9891136644b396941547e20cc7eea646560d0dad5a5458

      SHA512

      ab7a3409ed4b6ca00358330a3aa4ef6de7d81eb21a5e24bb629ef6a7c7c4e2a70ca3accfbc989ed6e495fdb8eb6203a26d6f2a37b2a5809af4276af375b49078

    • memory/1056-11-0x0000000006DF0000-0x0000000006E52000-memory.dmp
      Filesize

      392KB

    • memory/1056-3-0x0000000000080000-0x0000000000081000-memory.dmp
      Filesize

      4KB

    • memory/1056-6-0x00000000049A0000-0x00000000049A1000-memory.dmp
      Filesize

      4KB

    • memory/1056-7-0x0000000002500000-0x0000000002501000-memory.dmp
      Filesize

      4KB

    • memory/1056-2-0x0000000073940000-0x000000007402E000-memory.dmp
      Filesize

      6.9MB

    • memory/1056-9-0x0000000004D10000-0x0000000004D14000-memory.dmp
      Filesize

      16KB

    • memory/1056-5-0x0000000005070000-0x0000000005071000-memory.dmp
      Filesize

      4KB

    • memory/1056-10-0x0000000006610000-0x0000000006611000-memory.dmp
      Filesize

      4KB

    • memory/1056-8-0x0000000002520000-0x0000000002521000-memory.dmp
      Filesize

      4KB

    • memory/2416-13-0x00000000004375DE-mapping.dmp
    • memory/2416-12-0x0000000000400000-0x000000000043C000-memory.dmp
      Filesize

      240KB

    • memory/2416-15-0x0000000073940000-0x000000007402E000-memory.dmp
      Filesize

      6.9MB

    • memory/2416-20-0x0000000005A00000-0x0000000005A01000-memory.dmp
      Filesize

      4KB

    • memory/2416-21-0x00000000059D0000-0x00000000059D1000-memory.dmp
      Filesize

      4KB

    • memory/2416-22-0x0000000006570000-0x0000000006571000-memory.dmp
      Filesize

      4KB

    • memory/2416-25-0x0000000005A01000-0x0000000005A02000-memory.dmp
      Filesize

      4KB