Analysis

  • max time kernel
    131s
  • max time network
    124s
  • platform
    windows7_x64
  • resource
    win7v20210410
  • submitted
    27-07-2021 12:05

General

  • Target

    SOA.exe

  • Size

    804KB

  • MD5

    60183d985a20da08edde84ad283fdb57

  • SHA1

    fa905171e489e10068ba2853fcf8c83865019283

  • SHA256

    0663ffc968c7a2870e7c3234b4c2c2c5bae705a12a1f84ff4527af8d8b9466e5

  • SHA512

    074645a61274efa80eb6451abd37628fef9d15ff889cdc6fb6da74baf2514160e8d0f049c4927fa3890baaa031f945dbdd03604535d4cb26374f38c6db406cff

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    Mail.jingtai.com.vn
  • Port:
    587
  • Username:
    markhung@jingtai.com.vn
  • Password:
    truongtuyen2209

Signatures

  • AgentTesla

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

  • AgentTesla Payload 3 IoCs
  • Drops file in Drivers directory 1 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.

  • Adds Run key to start application 2 TTPs 1 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\SOA.exe
    "C:\Users\Admin\AppData\Local\Temp\SOA.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:752
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\kzsOkRNINsZo" /XML "C:\Users\Admin\AppData\Local\Temp\tmpB403.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:1020
    • C:\Users\Admin\AppData\Local\Temp\SOA.exe
      "{path}"
      2⤵
      • Drops file in Drivers directory
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:412

Network

MITRE ATT&CK Matrix ATT&CK v6

Execution

Scheduled Task

1
T1053

Persistence

Registry Run Keys / Startup Folder

1
T1060

Scheduled Task

1
T1053

Privilege Escalation

Scheduled Task

1
T1053

Defense Evasion

Modify Registry

1
T1112

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\tmpB403.tmp
    MD5

    bdc18d0a348fe520d402e307e596dbba

    SHA1

    da94ef520c4a4c7794c1e48467116c7c203eea5a

    SHA256

    5a9df1dbb484dbc1fcd41758d6dd15b29788dac5b70f359e766db40e30106c22

    SHA512

    a311688e61c8569d4042528a30913c973cd4bc2ed74e7e2ffc3e3d60c65802cb96a2f006daf6f56ff2930eb431b25a10a554412d707719a15986200a8de1a82e

  • memory/412-67-0x0000000000400000-0x000000000043C000-memory.dmp
    Filesize

    240KB

  • memory/412-68-0x000000000043768E-mapping.dmp
  • memory/412-69-0x0000000000400000-0x000000000043C000-memory.dmp
    Filesize

    240KB

  • memory/412-71-0x0000000004270000-0x0000000004271000-memory.dmp
    Filesize

    4KB

  • memory/412-72-0x0000000004271000-0x0000000004272000-memory.dmp
    Filesize

    4KB

  • memory/752-59-0x0000000000CC0000-0x0000000000CC1000-memory.dmp
    Filesize

    4KB

  • memory/752-61-0x0000000004CE0000-0x0000000004CE1000-memory.dmp
    Filesize

    4KB

  • memory/752-62-0x00000000008C0000-0x00000000008C2000-memory.dmp
    Filesize

    8KB

  • memory/752-63-0x0000000007EC0000-0x0000000007F43000-memory.dmp
    Filesize

    524KB

  • memory/752-64-0x0000000000B80000-0x0000000000BBD000-memory.dmp
    Filesize

    244KB

  • memory/1020-65-0x0000000000000000-mapping.dmp