Analysis

  • max time kernel
    135s
  • max time network
    127s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    18-03-2024 19:30

General

  • Target

    27.exe

  • Size

    521KB

  • MD5

    b29fbc48ad3305f4dcab0be3145682a6

  • SHA1

    73152dd5e9cdf69d7ae9ff114aa818b2ec0decfb

  • SHA256

    104ae348871545562f1f0a2712ddb88659fda045dd969affd79fbdc25fc7e2fd

  • SHA512

    5111621a6bfd323812eed98e1053bde36598c1fb719e7c401a090d5ee679aee02f59d0337cf0f4fed780fbb4550add1cf812203e59efedb531081cf43931e838

  • SSDEEP

    12288:zbiKz52aC1sP906WMPTxgt8UnlQJAHCUkO/tRqUjRQ1F5CZTAujRM:Tl2af9061uKyOJCCUb7qUjRQsN

Malware Config

Extracted

Credentials

  • Protocol:
    smtp
  • Host:
    mail.processengrg.com
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    Bigbrain2022#

Extracted

Family

agenttesla

Credentials

Signatures

  • AgentTesla

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

  • Reads WinSCP keys stored on the system 2 TTPs

    Tries to access WinSCP stored sessions.

  • 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
  • Looks up external IP address via web service 3 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Suspicious use of SetThreadContext 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\27.exe
    "C:\Users\Admin\AppData\Local\Temp\27.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1952
    • C:\Users\Admin\AppData\Local\Temp\27.exe
      "C:\Users\Admin\AppData\Local\Temp\27.exe"
      2⤵
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1404

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\27.exe.log

    Filesize

    706B

    MD5

    f8bcaf312de8591707436c1dcebba8e4

    SHA1

    a1269828e5f644601622f4a7a611aec8f2eda0b2

    SHA256

    f0f5a90777c70cdceea22bd66b33c1703a318acc45cb012d0b01585a1ac12b29

    SHA512

    3a714f5950584abbc94a27bbd4623bfc5acb1135c8c9fca4d74e70c8481b71ace7dbc1dfbf101dd07c76a050acfb4852f31dd57fc7ae196382336c5edc9e6413

  • memory/1404-13-0x0000000003280000-0x0000000003290000-memory.dmp

    Filesize

    64KB

  • memory/1404-8-0x0000000000400000-0x0000000000442000-memory.dmp

    Filesize

    264KB

  • memory/1404-19-0x0000000003280000-0x0000000003290000-memory.dmp

    Filesize

    64KB

  • memory/1404-18-0x0000000074D50000-0x0000000075500000-memory.dmp

    Filesize

    7.7MB

  • memory/1404-12-0x0000000074D50000-0x0000000075500000-memory.dmp

    Filesize

    7.7MB

  • memory/1404-17-0x00000000071D0000-0x00000000071DA000-memory.dmp

    Filesize

    40KB

  • memory/1404-16-0x0000000007130000-0x0000000007180000-memory.dmp

    Filesize

    320KB

  • memory/1404-14-0x0000000005790000-0x00000000057F6000-memory.dmp

    Filesize

    408KB

  • memory/1952-6-0x0000000005B40000-0x0000000005BDC000-memory.dmp

    Filesize

    624KB

  • memory/1952-5-0x0000000005A00000-0x0000000005A92000-memory.dmp

    Filesize

    584KB

  • memory/1952-3-0x0000000005910000-0x0000000005920000-memory.dmp

    Filesize

    64KB

  • memory/1952-0-0x0000000000E70000-0x0000000000EF8000-memory.dmp

    Filesize

    544KB

  • memory/1952-11-0x0000000074D50000-0x0000000075500000-memory.dmp

    Filesize

    7.7MB

  • memory/1952-7-0x00000000059A0000-0x00000000059A8000-memory.dmp

    Filesize

    32KB

  • memory/1952-2-0x0000000005880000-0x00000000058F0000-memory.dmp

    Filesize

    448KB

  • memory/1952-4-0x0000000005ED0000-0x0000000006474000-memory.dmp

    Filesize

    5.6MB

  • memory/1952-1-0x0000000074D50000-0x0000000075500000-memory.dmp

    Filesize

    7.7MB