Analysis

  • max time kernel
    126s
  • max time network
    17s
  • platform
    windows7_x64
  • resource
    win7v20210408
  • submitted
    04-05-2021 14:14

General

  • Target

    Ll2LxWOagynlSgJ.exe

  • Size

    674KB

  • MD5

    9dfaa6afc47f0bf01155b7f8253f719b

  • SHA1

    0e82d1395e219ed0400959e6315675fdd03f0a54

  • SHA256

    fd0be553157fca2a0a5f4cc559d95a3d6ec4b27b6f1368cad25997cac0ccac8f

  • SHA512

    95f379a10ffd895be1b653dfb32227be31764c13ce75f35f21be6472045e385bb0aca718a6a1b0c57158c1449094b409c3192f19c47900e2d3829588b9980e2e

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    smtp.nilkarnal.com
  • Port:
    587
  • Username:
    logs@nilkarnal.com
  • Password:
    company1960

Signatures

  • AgentTesla

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

  • AgentTesla Payload 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 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 17 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Ll2LxWOagynlSgJ.exe
    "C:\Users\Admin\AppData\Local\Temp\Ll2LxWOagynlSgJ.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:1652
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\AhuFCWIiU" /XML "C:\Users\Admin\AppData\Local\Temp\tmp2378.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:564
    • C:\Users\Admin\AppData\Local\Temp\Ll2LxWOagynlSgJ.exe
      "C:\Users\Admin\AppData\Local\Temp\Ll2LxWOagynlSgJ.exe"
      2⤵
        PID:1636
      • C:\Users\Admin\AppData\Local\Temp\Ll2LxWOagynlSgJ.exe
        "C:\Users\Admin\AppData\Local\Temp\Ll2LxWOagynlSgJ.exe"
        2⤵
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:1840

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Execution

    Scheduled Task

    1
    T1053

    Persistence

    Scheduled Task

    1
    T1053

    Privilege Escalation

    Scheduled Task

    1
    T1053

    Discovery

    System Information Discovery

    1
    T1082

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Temp\tmp2378.tmp
      MD5

      01dc1ed1183dc0aa981275637d3e81bf

      SHA1

      44b95374dd34571b7085e70c14fa4d04a4636942

      SHA256

      9295bd678071e53a8e22896a37191e2f573f3a479e03f718f9b3878435be33a1

      SHA512

      c92c63e99e3b6af93646976afce6776620effb64b35bbd5da77da6f1ae5aa2e3f1aed002fa81ef9cc06886d80cb620f639e64fe09ce2f529813fa6db67c5cec2

    • memory/564-68-0x0000000000000000-mapping.dmp
    • memory/1652-67-0x0000000004DA0000-0x0000000004DDE000-memory.dmp
      Filesize

      248KB

    • memory/1652-64-0x0000000004CE2000-0x0000000004CE3000-memory.dmp
      Filesize

      4KB

    • memory/1652-65-0x0000000000830000-0x000000000083E000-memory.dmp
      Filesize

      56KB

    • memory/1652-66-0x0000000004F80000-0x0000000004FFB000-memory.dmp
      Filesize

      492KB

    • memory/1652-60-0x00000000002F0000-0x00000000002F1000-memory.dmp
      Filesize

      4KB

    • memory/1652-63-0x0000000004CE1000-0x0000000004CE2000-memory.dmp
      Filesize

      4KB

    • memory/1652-62-0x0000000004CE0000-0x0000000004CE1000-memory.dmp
      Filesize

      4KB

    • memory/1840-71-0x00000000004375FE-mapping.dmp
    • memory/1840-70-0x0000000000400000-0x000000000043C000-memory.dmp
      Filesize

      240KB

    • memory/1840-72-0x0000000000400000-0x000000000043C000-memory.dmp
      Filesize

      240KB

    • memory/1840-74-0x0000000004910000-0x0000000004911000-memory.dmp
      Filesize

      4KB