Analysis

  • max time kernel
    123s
  • max time network
    135s
  • platform
    windows10_x64
  • resource
    win10v20210410
  • submitted
    28-07-2021 10:03

General

  • Target

    bank account.exe

  • Size

    780KB

  • MD5

    a5640ac4a8b294df8ced6dfd0ca544f3

  • SHA1

    94fc2bc720e88f5f1bcab268fd441c3f640d63c3

  • SHA256

    c57c8d4d2e724683791c90f26d4499886ab0498688740b5433e1c4a36680564e

  • SHA512

    c49a3f261ee1832bc41d887bf0b195ea707a4eb4fd15f46bd3ec55329169ae97d1953338e736532219b483b2954f76545544eb1e7fc632ea78c48b31bb012fbd

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    Mail.jingtai.com.vn
  • Port:
    587
  • Username:
    [email protected]
  • 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 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 14 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\bank account.exe
    "C:\Users\Admin\AppData\Local\Temp\bank account.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4076
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\IVNmTSJGrzid" /XML "C:\Users\Admin\AppData\Local\Temp\tmp9D11.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:1224
    • C:\Users\Admin\AppData\Local\Temp\bank account.exe
      "{path}"
      2⤵
        PID:1088
      • C:\Users\Admin\AppData\Local\Temp\bank account.exe
        "{path}"
        2⤵
        • Drops file in Drivers directory
        • Adds Run key to start application
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:3264

    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\Microsoft\CLR_v4.0_32\UsageLogs\bank account.exe.log
      MD5

      0c2899d7c6746f42d5bbe088c777f94c

      SHA1

      622f66c5f7a3c91b28a9f43ce7c6cabadbf514f1

      SHA256

      5b0b99740cadaeff7b9891136644b396941547e20cc7eea646560d0dad5a5458

      SHA512

      ab7a3409ed4b6ca00358330a3aa4ef6de7d81eb21a5e24bb629ef6a7c7c4e2a70ca3accfbc989ed6e495fdb8eb6203a26d6f2a37b2a5809af4276af375b49078

    • C:\Users\Admin\AppData\Local\Temp\tmp9D11.tmp
      MD5

      98edd11150c6e1baf4103e52bc1ab008

      SHA1

      3e6b92d892253c2b954b48783fe81a7c76092f23

      SHA256

      b307d1e10279f111b747aa4a5bb80323bd7209a805c50018138968d406990c66

      SHA512

      f06feac345076793009e9e26a86d2f753eec82b518c1b3d6a846abee21f7735fc8309e271b4a886b2f3633925a9f866cc1c570c7da1b5426c0f429d360176351

    • memory/1224-124-0x0000000000000000-mapping.dmp
    • memory/3264-135-0x0000000005E40000-0x0000000005E41000-memory.dmp
      Filesize

      4KB

    • memory/3264-134-0x0000000005160000-0x0000000005161000-memory.dmp
      Filesize

      4KB

    • memory/3264-133-0x0000000005150000-0x000000000564E000-memory.dmp
      Filesize

      5.0MB

    • memory/3264-127-0x000000000043768E-mapping.dmp
    • memory/3264-126-0x0000000000400000-0x000000000043C000-memory.dmp
      Filesize

      240KB

    • memory/4076-119-0x0000000005AD0000-0x0000000005AD2000-memory.dmp
      Filesize

      8KB

    • memory/4076-123-0x00000000072F0000-0x0000000007328000-memory.dmp
      Filesize

      224KB

    • memory/4076-122-0x00000000073B0000-0x000000000742D000-memory.dmp
      Filesize

      500KB

    • memory/4076-121-0x0000000003030000-0x0000000003031000-memory.dmp
      Filesize

      4KB

    • memory/4076-120-0x0000000008C40000-0x0000000008C41000-memory.dmp
      Filesize

      4KB

    • memory/4076-114-0x0000000000D90000-0x0000000000D91000-memory.dmp
      Filesize

      4KB

    • memory/4076-118-0x00000000056A0000-0x00000000056A1000-memory.dmp
      Filesize

      4KB

    • memory/4076-117-0x0000000005700000-0x0000000005701000-memory.dmp
      Filesize

      4KB

    • memory/4076-116-0x0000000005B60000-0x0000000005B61000-memory.dmp
      Filesize

      4KB