Analysis

  • max time kernel
    99s
  • max time network
    102s
  • platform
    windows10_x64
  • resource
    win10v20201028
  • submitted
    28-01-2021 15:02

General

  • Target

    0238-35-pdf.scr.exe

  • Size

    3.0MB

  • MD5

    9b91522e5b94de5ec962c882288671c5

  • SHA1

    b16caef75e2c751eef2678aafbf2ed5facc9459e

  • SHA256

    440584979145865d0d4ed8eccb48f90699a2b0c6c6eef0c2162db0d42b1c0fdc

  • SHA512

    d09fab75ea65faa4b6f01c206c014db414d36728ae164478df6d5bb415bd15c1d8a9a62ace595d33927588cdb3a62c95269e23cfbc05d268a1b06f9a6d381b3d

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    mail.newviking.com.my
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    {&SgX:^(7m

Signatures

  • AgentTesla

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

  • Turns off Windows Defender SpyNet reporting 2 TTPs
  • Windows security bypass 2 TTPs
  • 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.

  • Windows security modification 2 TTPs 10 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs
  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Suspicious behavior: EnumeratesProcesses 5 IoCs
  • Suspicious behavior: RenamesItself 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 11 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\0238-35-pdf.scr.exe
    "C:\Users\Admin\AppData\Local\Temp\0238-35-pdf.scr.exe"
    1⤵
    • Windows security modification
    • Suspicious use of SetThreadContext
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1232
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\0238-35-pdf.scr.exe" -Force
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2668
    • C:\Users\Admin\AppData\Local\Temp\0238-35-pdf.scr.exe
      "C:\Users\Admin\AppData\Local\Temp\0238-35-pdf.scr.exe"
      2⤵
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: RenamesItself
      • Suspicious use of AdjustPrivilegeToken
      PID:4008

Network

MITRE ATT&CK Matrix ATT&CK v6

Persistence

Registry Run Keys / Startup Folder

1
T1060

Defense Evasion

Disabling Security Tools

3
T1089

Modify Registry

4
T1112

Credential Access

Credentials in Files

3
T1081

Discovery

System Information Discovery

1
T1082

Collection

Data from Local System

3
T1005

Command and Control

Web Service

1
T1102

Replay Monitor

Loading Replay Monitor...

Downloads

  • memory/1232-2-0x0000000073CB0000-0x000000007439E000-memory.dmp
    Filesize

    6.9MB

  • memory/1232-3-0x00000000004A0000-0x00000000004A1000-memory.dmp
    Filesize

    4KB

  • memory/1232-4-0x0000000004F80000-0x0000000004F81000-memory.dmp
    Filesize

    4KB

  • memory/1232-5-0x0000000005200000-0x0000000005201000-memory.dmp
    Filesize

    4KB

  • memory/1232-6-0x0000000005750000-0x0000000005797000-memory.dmp
    Filesize

    284KB

  • memory/1232-7-0x0000000005EE0000-0x0000000005EE1000-memory.dmp
    Filesize

    4KB

  • memory/2668-18-0x0000000008220000-0x0000000008221000-memory.dmp
    Filesize

    4KB

  • memory/2668-30-0x0000000009B70000-0x0000000009B71000-memory.dmp
    Filesize

    4KB

  • memory/2668-10-0x00000000072F0000-0x00000000072F1000-memory.dmp
    Filesize

    4KB

  • memory/2668-11-0x00000000079C0000-0x00000000079C1000-memory.dmp
    Filesize

    4KB

  • memory/2668-12-0x0000000007380000-0x0000000007381000-memory.dmp
    Filesize

    4KB

  • memory/2668-13-0x0000000007382000-0x0000000007383000-memory.dmp
    Filesize

    4KB

  • memory/2668-15-0x00000000080E0000-0x00000000080E1000-memory.dmp
    Filesize

    4KB

  • memory/2668-14-0x0000000008020000-0x0000000008021000-memory.dmp
    Filesize

    4KB

  • memory/2668-16-0x0000000008150000-0x0000000008151000-memory.dmp
    Filesize

    4KB

  • memory/2668-17-0x00000000083A0000-0x00000000083A1000-memory.dmp
    Filesize

    4KB

  • memory/2668-8-0x0000000000000000-mapping.dmp
  • memory/2668-19-0x00000000087B0000-0x00000000087B1000-memory.dmp
    Filesize

    4KB

  • memory/2668-20-0x0000000008AC0000-0x0000000008AC1000-memory.dmp
    Filesize

    4KB

  • memory/2668-22-0x0000000009A30000-0x0000000009A63000-memory.dmp
    Filesize

    204KB

  • memory/2668-29-0x0000000009A10000-0x0000000009A11000-memory.dmp
    Filesize

    4KB

  • memory/2668-9-0x0000000073CB0000-0x000000007439E000-memory.dmp
    Filesize

    6.9MB

  • memory/2668-31-0x0000000009D30000-0x0000000009D31000-memory.dmp
    Filesize

    4KB

  • memory/2668-32-0x000000007F2D0000-0x000000007F2D1000-memory.dmp
    Filesize

    4KB

  • memory/2668-33-0x0000000007383000-0x0000000007384000-memory.dmp
    Filesize

    4KB

  • memory/2668-38-0x0000000009CD0000-0x0000000009CD1000-memory.dmp
    Filesize

    4KB

  • memory/2668-35-0x0000000009CE0000-0x0000000009CE1000-memory.dmp
    Filesize

    4KB

  • memory/4008-37-0x000000000043763E-mapping.dmp
  • memory/4008-39-0x0000000073CB0000-0x000000007439E000-memory.dmp
    Filesize

    6.9MB

  • memory/4008-34-0x0000000000400000-0x000000000043C000-memory.dmp
    Filesize

    240KB

  • memory/4008-45-0x0000000005390000-0x0000000005391000-memory.dmp
    Filesize

    4KB

  • memory/4008-46-0x00000000056B0000-0x00000000056B1000-memory.dmp
    Filesize

    4KB

  • memory/4008-48-0x0000000006600000-0x0000000006601000-memory.dmp
    Filesize

    4KB

  • memory/4008-49-0x00000000061F0000-0x00000000061F1000-memory.dmp
    Filesize

    4KB

  • memory/4008-50-0x0000000005391000-0x0000000005392000-memory.dmp
    Filesize

    4KB