Analysis

  • max time kernel
    128s
  • max time network
    120s
  • platform
    windows10_x64
  • resource
    win10-en-20211104
  • submitted
    01-12-2021 08:32

General

  • Target

    SecuriteInfo.com.Trojan.YakbeexMSIL.ZZ4.1057.9472.exe

  • Size

    732KB

  • MD5

    d47502f0f5b346169fe57cabb1228eee

  • SHA1

    9ddfed11c7fd9beedc44c39ce7f1cac45783b532

  • SHA256

    2d1dda31bb4e7657a3f9878a056323e398590837d3c11b45540013103bfbca97

  • SHA512

    24869686cdea61de8025471bed5f5fe38ea0e5e94aec375cf52a25fc5ec28319314471576f66d5bbe66da45c252a6620cd272dc2690fbc929973a0e0b8eb284b

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    mail.dairysystems.co.ke
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    2019@systems

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.

  • Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Trojan.YakbeexMSIL.ZZ4.1057.9472.exe
    "C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Trojan.YakbeexMSIL.ZZ4.1057.9472.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:4292
    • C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Trojan.YakbeexMSIL.ZZ4.1057.9472.exe
      "C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Trojan.YakbeexMSIL.ZZ4.1057.9472.exe"
      2⤵
      • Drops file in Drivers directory
      • Accesses Microsoft Outlook profiles
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • outlook_office_path
      • outlook_win_path
      PID:3528

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\SecuriteInfo.com.Trojan.YakbeexMSIL.ZZ4.1057.9472.exe.log

    MD5

    0c2899d7c6746f42d5bbe088c777f94c

    SHA1

    622f66c5f7a3c91b28a9f43ce7c6cabadbf514f1

    SHA256

    5b0b99740cadaeff7b9891136644b396941547e20cc7eea646560d0dad5a5458

    SHA512

    ab7a3409ed4b6ca00358330a3aa4ef6de7d81eb21a5e24bb629ef6a7c7c4e2a70ca3accfbc989ed6e495fdb8eb6203a26d6f2a37b2a5809af4276af375b49078

  • memory/3528-127-0x0000000000400000-0x000000000043C000-memory.dmp

    Filesize

    240KB

  • memory/3528-136-0x0000000005D30000-0x0000000005D31000-memory.dmp

    Filesize

    4KB

  • memory/3528-135-0x0000000005110000-0x0000000005111000-memory.dmp

    Filesize

    4KB

  • memory/3528-134-0x0000000005140000-0x000000000563E000-memory.dmp

    Filesize

    5.0MB

  • memory/3528-128-0x000000000043763E-mapping.dmp

  • memory/4292-122-0x0000000004F50000-0x0000000004F51000-memory.dmp

    Filesize

    4KB

  • memory/4292-126-0x0000000008A80000-0x0000000008B2C000-memory.dmp

    Filesize

    688KB

  • memory/4292-125-0x0000000008770000-0x0000000008771000-memory.dmp

    Filesize

    4KB

  • memory/4292-124-0x0000000008440000-0x0000000008446000-memory.dmp

    Filesize

    24KB

  • memory/4292-123-0x0000000004DF0000-0x00000000052EE000-memory.dmp

    Filesize

    5.0MB

  • memory/4292-118-0x00000000005A0000-0x00000000005A1000-memory.dmp

    Filesize

    4KB

  • memory/4292-121-0x0000000004E90000-0x0000000004E91000-memory.dmp

    Filesize

    4KB

  • memory/4292-120-0x00000000052F0000-0x00000000052F1000-memory.dmp

    Filesize

    4KB