Analysis

  • max time kernel
    125s
  • max time network
    111s
  • platform
    windows10_x64
  • resource
    win10v20201028
  • submitted
    29-01-2021 14:38

General

  • Target

    Y6YUOzu5ynWpiPp.exe

  • Size

    738KB

  • MD5

    634e050470e5dd1bbe3a70eb8e728246

  • SHA1

    545edebaf3e37197a4fcc75b4e0c2ee0af225ef2

  • SHA256

    6eb0affd63b0d85be603948881fc6b643103e96e3f68acf1350969e8d09cc7e1

  • SHA512

    f3085d7193a7ecd74f26d650a2ad56d4b66fc81ef2928e2c413438775deb3d27cc5e22ca0f0fc94700f10c8456de56c1ab745c20b2b69cee11ff73e0d4f52179

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    smtp.yatchbabara.com
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    j$Mk$NE7

Signatures

  • AgentTesla

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

  • 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.

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Y6YUOzu5ynWpiPp.exe
    "C:\Users\Admin\AppData\Local\Temp\Y6YUOzu5ynWpiPp.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4772
    • C:\Users\Admin\AppData\Local\Temp\Y6YUOzu5ynWpiPp.exe
      "{path}"
      2⤵
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      PID:560

Network

MITRE ATT&CK Matrix ATT&CK v6

Persistence

Registry Run Keys / Startup Folder

1
T1060

Defense Evasion

Modify Registry

1
T1112

Credential Access

Credentials in Files

3
T1081

Collection

Data from Local System

3
T1005

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\Y6YUOzu5ynWpiPp.exe.log
    MD5

    0c2899d7c6746f42d5bbe088c777f94c

    SHA1

    622f66c5f7a3c91b28a9f43ce7c6cabadbf514f1

    SHA256

    5b0b99740cadaeff7b9891136644b396941547e20cc7eea646560d0dad5a5458

    SHA512

    ab7a3409ed4b6ca00358330a3aa4ef6de7d81eb21a5e24bb629ef6a7c7c4e2a70ca3accfbc989ed6e495fdb8eb6203a26d6f2a37b2a5809af4276af375b49078

  • memory/560-12-0x0000000000400000-0x000000000043C000-memory.dmp
    Filesize

    240KB

  • memory/560-25-0x00000000057F1000-0x00000000057F2000-memory.dmp
    Filesize

    4KB

  • memory/560-22-0x00000000064C0000-0x00000000064C1000-memory.dmp
    Filesize

    4KB

  • memory/560-21-0x0000000005C00000-0x0000000005C01000-memory.dmp
    Filesize

    4KB

  • memory/560-20-0x00000000057F0000-0x00000000057F1000-memory.dmp
    Filesize

    4KB

  • memory/560-15-0x0000000073360000-0x0000000073A4E000-memory.dmp
    Filesize

    6.9MB

  • memory/560-13-0x00000000004375DE-mapping.dmp
  • memory/4772-7-0x00000000058A0000-0x00000000058A1000-memory.dmp
    Filesize

    4KB

  • memory/4772-11-0x0000000007BC0000-0x0000000007C20000-memory.dmp
    Filesize

    384KB

  • memory/4772-10-0x0000000007C60000-0x0000000007C61000-memory.dmp
    Filesize

    4KB

  • memory/4772-9-0x00000000059A0000-0x00000000059A4000-memory.dmp
    Filesize

    16KB

  • memory/4772-8-0x00000000059E0000-0x00000000059E1000-memory.dmp
    Filesize

    4KB

  • memory/4772-2-0x0000000073360000-0x0000000073A4E000-memory.dmp
    Filesize

    6.9MB

  • memory/4772-6-0x0000000005800000-0x0000000005801000-memory.dmp
    Filesize

    4KB

  • memory/4772-5-0x0000000005DC0000-0x0000000005DC1000-memory.dmp
    Filesize

    4KB

  • memory/4772-3-0x0000000000F20000-0x0000000000F21000-memory.dmp
    Filesize

    4KB