Analysis

  • max time kernel
    139s
  • max time network
    15s
  • platform
    windows7_x64
  • resource
    win7v20201028
  • submitted
    22-01-2021 07:07

General

  • Target

    RFQ #6553928_PDF.exe

  • Size

    1003KB

  • MD5

    126a06711f90b3bb00d5cdf657bbd381

  • SHA1

    50c06ee54498c3a960baf9aca1f62909edf1981c

  • SHA256

    20795651735a3b9de9a7cd1ec01ea78c8acd43c9cb67dda8628cf1559bdcba1c

  • SHA512

    ccf017de3b41b4b7372651aeaf73f0ca25fdf7ab6075634d5cd1600801a3fe438ce3c86ceccb5de7a31f626286dd75ef02dbc9ec3f0019541eb980a76d8191fc

Malware Config

Extracted

Family

agenttesla

C2

https://api.telegram.org/bot1513271204:AAFn4hPg2fp2zgo9ieA28FrdaCkpwxApdbA/sendDocument

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

Processes

  • C:\Users\Admin\AppData\Local\Temp\RFQ #6553928_PDF.exe
    "C:\Users\Admin\AppData\Local\Temp\RFQ #6553928_PDF.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1856
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\uZAqSbOWQIwH" /XML "C:\Users\Admin\AppData\Local\Temp\tmp15F1.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:672
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
      "{path}"
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1716

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\tmp15F1.tmp
    MD5

    f968887707d52bb3ddfde8fe3b1c797f

    SHA1

    3c91297409f893f937a113b8e714bec645106674

    SHA256

    cb15a70816953638b6294f21827c3679ed920a387afe25c614d06ca36665a321

    SHA512

    c3f10df80c56eb45a94e78b533ebb23b82f6700f31240cb54c8cf5fa3175e6717aadb602ffb191539addba70d2070dd95b5a0e84bb55dd07fb0e7c19e13f5a23

  • memory/672-8-0x0000000000000000-mapping.dmp
  • memory/1716-12-0x0000000074590000-0x0000000074C7E000-memory.dmp
    Filesize

    6MB

  • memory/1716-10-0x0000000000400000-0x000000000043C000-memory.dmp
    Filesize

    240KB

  • memory/1716-11-0x000000000043777E-mapping.dmp
  • memory/1716-13-0x0000000000400000-0x000000000043C000-memory.dmp
    Filesize

    240KB

  • memory/1716-15-0x0000000004A50000-0x0000000004A51000-memory.dmp
    Filesize

    4KB

  • memory/1716-16-0x0000000004A51000-0x0000000004A52000-memory.dmp
    Filesize

    4KB

  • memory/1856-6-0x0000000000350000-0x000000000035E000-memory.dmp
    Filesize

    56KB

  • memory/1856-7-0x0000000005790000-0x0000000005836000-memory.dmp
    Filesize

    664KB

  • memory/1856-5-0x00000000043C0000-0x00000000043C1000-memory.dmp
    Filesize

    4KB

  • memory/1856-3-0x0000000000C40000-0x0000000000C41000-memory.dmp
    Filesize

    4KB

  • memory/1856-2-0x0000000074590000-0x0000000074C7E000-memory.dmp
    Filesize

    6MB