Analysis

  • max time kernel
    133s
  • max time network
    15s
  • platform
    windows7_x64
  • resource
    win7v20201028
  • submitted
    28-01-2021 14:03

General

  • Target

    3L2hNTBCtArFvSA.exe

  • Size

    959KB

  • MD5

    d8462cbddfb5bd7789d37437e89ed852

  • SHA1

    d71607e8d65e4b5d0af96dfce670c9ec42a8724f

  • SHA256

    93cca2ba4ea093c17f9ec9f3997efa43be301489f8f3a99465e6017dd74aa7a0

  • SHA512

    0028a8a6cc36ec9bab5222bd9fdab29aa127f520e1833768fff527b15bbf143997520707bc41fe6a47c8dcd0005e23676326cf922994c080b039e10a686bf8ac

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 3 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 9 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\3L2hNTBCtArFvSA.exe
    "C:\Users\Admin\AppData\Local\Temp\3L2hNTBCtArFvSA.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1724
    • C:\Users\Admin\AppData\Local\Temp\3L2hNTBCtArFvSA.exe
      "{path}"
      2⤵
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      PID:1376

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

  • memory/1376-8-0x0000000000400000-0x000000000043C000-memory.dmp
    Filesize

    240KB

  • memory/1376-9-0x00000000004375DE-mapping.dmp
  • memory/1376-10-0x0000000074D20000-0x000000007540E000-memory.dmp
    Filesize

    6.9MB

  • memory/1376-11-0x0000000000400000-0x000000000043C000-memory.dmp
    Filesize

    240KB

  • memory/1376-13-0x0000000002180000-0x0000000002181000-memory.dmp
    Filesize

    4KB

  • memory/1376-14-0x0000000002181000-0x0000000002182000-memory.dmp
    Filesize

    4KB

  • memory/1724-2-0x0000000074D20000-0x000000007540E000-memory.dmp
    Filesize

    6.9MB

  • memory/1724-3-0x00000000008E0000-0x00000000008E1000-memory.dmp
    Filesize

    4KB

  • memory/1724-5-0x0000000007250000-0x0000000007251000-memory.dmp
    Filesize

    4KB

  • memory/1724-6-0x00000000002A0000-0x00000000002A4000-memory.dmp
    Filesize

    16KB

  • memory/1724-7-0x00000000009E0000-0x0000000000A3E000-memory.dmp
    Filesize

    376KB