Analysis

  • max time kernel
    142s
  • max time network
    37s
  • platform
    windows7_x64
  • resource
    win7v200430
  • submitted
    09-07-2020 08:25

General

  • Target

    NEWPURCHASEORDER-709.exe

  • Size

    385KB

  • MD5

    d82697b49947ccfa6a4efb06b3979cbb

  • SHA1

    bcb6ee3200e31ebd5de9fd0b67aad7f6fa18a312

  • SHA256

    a46f78f7e28f2091db3e5c505f6c2811397464d6220c52a747cbde491584ca2b

  • SHA512

    7bac26ed1578fba7476e4b0e41baf8a62c7c2860c7046392120b784d24c9de674ebb2066006f964808f21c5fcae50627c23b237b588a2401fe8764e7634da3b6

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    mail.sridurgaagros.com
  • Port:
    587
  • Username:
    bestlog@sridurgaagros.com
  • Password:
    @Hammer197

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\NEWPURCHASEORDER-709.exe
    "C:\Users\Admin\AppData\Local\Temp\NEWPURCHASEORDER-709.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:240
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\XCumuboEIvnAA" /XML "C:\Users\Admin\AppData\Local\Temp\tmp6A75.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:1848
    • C:\Users\Admin\AppData\Local\Temp\NEWPURCHASEORDER-709.exe
      "C:\Users\Admin\AppData\Local\Temp\NEWPURCHASEORDER-709.exe"
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1768

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\tmp6A75.tmp
    MD5

    93731e1b87e8f97ffb557db149521068

    SHA1

    f777da7648ba213aca5ff117be97f8e0afd116fc

    SHA256

    bdca26df980219ba6c6345d7536fa81de9b554a6c21e6e2167fb3ecd0d975f66

    SHA512

    b85888ad5a6141bf7b1df3c4d8c6cdd4d422f3c284f1c057661bc28c44757d363fcc5c2e175fe94f924e276beae62523a014dc740e316f3e0b8225ba94fa865f

  • memory/240-1-0x0000000000000000-0x0000000000000000-disk.dmp
  • memory/1768-5-0x000000000044707E-mapping.dmp
  • memory/1768-4-0x0000000000400000-0x000000000044C000-memory.dmp
    Filesize

    304KB

  • memory/1768-6-0x0000000000400000-0x000000000044C000-memory.dmp
    Filesize

    304KB

  • memory/1768-7-0x0000000000400000-0x000000000044C000-memory.dmp
    Filesize

    304KB

  • memory/1848-2-0x0000000000000000-mapping.dmp