Analysis

  • max time kernel
    130s
  • max time network
    137s
  • platform
    windows7_x64
  • resource
    win7
  • submitted
    10-07-2020 11:20

General

  • Target

    Document din 40-312296854.exe

  • Size

    437KB

  • MD5

    961b7aea9625d6a84e06f18afd8f4027

  • SHA1

    59585bd71bcf196b794b6503fddc43405f9dedcf

  • SHA256

    84f7bbb691b431355264cf4e815bf32281c00efe34805b47b7e8aef84fbe610e

  • SHA512

    907dd33d077919f84fbf0721770bd708b10b9503bd0ff1ae684ba9c46d3eac7aa9f4c59d4bdb71df97068dd8de1c73a0a37858825447af905b8dceb596a607d9

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    mail.mlibano.com.br
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    libano@2017

Signatures

  • AgentTesla

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

  • AgentTesla Payload 4 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.

  • 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 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 13 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Document din 40-312296854.exe
    "C:\Users\Admin\AppData\Local\Temp\Document din 40-312296854.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1072
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\VEETrpvqChgwu" /XML "C:\Users\Admin\AppData\Local\Temp\tmp83A0.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:1452
    • C:\Users\Admin\AppData\Local\Temp\Document din 40-312296854.exe
      "{path}"
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1632

Network

MITRE ATT&CK Matrix ATT&CK v6

Execution

Scheduled Task

1
T1053

Persistence

Scheduled Task

1
T1053

Privilege Escalation

Scheduled Task

1
T1053

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

  • C:\Users\Admin\AppData\Local\Temp\tmp83A0.tmp
    MD5

    4d2a51c11dc528f08fae2aa85f06aa9c

    SHA1

    a10741a109e7f17884aaff5138aa9b61315c6bb2

    SHA256

    7ed012d1ae9e6c8e3c8be5747ff67e4c002e9d57df5d7ffbe82dc459f091e076

    SHA512

    01f69e6bcae23bb722e7c565f7b4eea21bc19852bf18fcf718e4e7dcc2831db4dfcfbe91db43b225cfff635560ef92eebeee594f85d02ee8c1b7078fe31f2720

  • memory/1072-1-0x0000000000000000-0x0000000000000000-disk.dmp
  • memory/1452-2-0x0000000000000000-mapping.dmp
  • memory/1632-4-0x0000000000400000-0x000000000044C000-memory.dmp
    Filesize

    304KB

  • memory/1632-5-0x0000000000447E8E-mapping.dmp
  • memory/1632-6-0x0000000000400000-0x000000000044C000-memory.dmp
    Filesize

    304KB

  • memory/1632-7-0x0000000000400000-0x000000000044C000-memory.dmp
    Filesize

    304KB