Analysis

  • max time kernel
    132s
  • max time network
    151s
  • platform
    windows10_x64
  • resource
    win10v20201028
  • submitted
    29-01-2021 14:37

General

  • Target

    sUYjLDLnEi6Pv5y.exe

  • Size

    702KB

  • MD5

    541f21ea9b009eb8305113b63a4f65f0

  • SHA1

    39919825256e0d59958c51c22a99f7217498e42c

  • SHA256

    b7ca7cb881d15414b022a7c568bfaf861a0be5c404fa800cd6549dc5819c6d0a

  • SHA512

    4ab45d4e8858c30c01243435b1798349d75ec5b48939966e4b896d8d9e2ead468a04e953727f1ead1bfd81c9095c3e79f7dd2a12bb8db971b4b656fc8388bbad

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\sUYjLDLnEi6Pv5y.exe
    "C:\Users\Admin\AppData\Local\Temp\sUYjLDLnEi6Pv5y.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:496
    • C:\Users\Admin\AppData\Local\Temp\sUYjLDLnEi6Pv5y.exe
      "{path}"
      2⤵
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      PID:3736

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\sUYjLDLnEi6Pv5y.exe.log
    MD5

    0c2899d7c6746f42d5bbe088c777f94c

    SHA1

    622f66c5f7a3c91b28a9f43ce7c6cabadbf514f1

    SHA256

    5b0b99740cadaeff7b9891136644b396941547e20cc7eea646560d0dad5a5458

    SHA512

    ab7a3409ed4b6ca00358330a3aa4ef6de7d81eb21a5e24bb629ef6a7c7c4e2a70ca3accfbc989ed6e495fdb8eb6203a26d6f2a37b2a5809af4276af375b49078

  • memory/496-11-0x0000000007A40000-0x0000000007AA2000-memory.dmp
    Filesize

    392KB

  • memory/496-3-0x0000000000C70000-0x0000000000C71000-memory.dmp
    Filesize

    4KB

  • memory/496-6-0x0000000005750000-0x0000000005751000-memory.dmp
    Filesize

    4KB

  • memory/496-7-0x0000000003250000-0x0000000003251000-memory.dmp
    Filesize

    4KB

  • memory/496-2-0x0000000073360000-0x0000000073A4E000-memory.dmp
    Filesize

    6.9MB

  • memory/496-9-0x0000000005950000-0x0000000005954000-memory.dmp
    Filesize

    16KB

  • memory/496-5-0x0000000005BB0000-0x0000000005BB1000-memory.dmp
    Filesize

    4KB

  • memory/496-10-0x0000000007AE0000-0x0000000007AE1000-memory.dmp
    Filesize

    4KB

  • memory/496-8-0x00000000059D0000-0x00000000059D1000-memory.dmp
    Filesize

    4KB

  • memory/3736-13-0x00000000004375DE-mapping.dmp
  • memory/3736-12-0x0000000000400000-0x000000000043C000-memory.dmp
    Filesize

    240KB

  • memory/3736-15-0x0000000073360000-0x0000000073A4E000-memory.dmp
    Filesize

    6.9MB

  • memory/3736-20-0x0000000005090000-0x0000000005091000-memory.dmp
    Filesize

    4KB

  • memory/3736-21-0x00000000059C0000-0x00000000059C1000-memory.dmp
    Filesize

    4KB

  • memory/3736-22-0x0000000005A60000-0x0000000005A61000-memory.dmp
    Filesize

    4KB

  • memory/3736-25-0x0000000005091000-0x0000000005092000-memory.dmp
    Filesize

    4KB