Analysis

  • max time kernel
    120s
  • max time network
    131s
  • platform
    windows7_x64
  • resource
    win7-en-20211104
  • submitted
    03-12-2021 09:47

General

  • Target

    2345678098765T4323456789G.exe

  • Size

    396KB

  • MD5

    7091684f6d958d8bbb0ae72d30ef3f93

  • SHA1

    946ab60d8020ed0209f2fc5237020ed74e2bf2f8

  • SHA256

    7bbfbb37c39b9f86adc6fda345c835cb256948cdc886b273c3215e4ccbbd877a

  • SHA512

    d9374aff01b656fd92c6e44e095ed958be11c07b84a2d65f569ee278960571ac2ab3f1f7960113b8438b69945274e1e6d888a07646d528136102b6aad8979ae8

Malware Config

Extracted

Family

snakekeylogger

Credentials

  • Protocol:
    smtp
  • Host:
    serv3.devmexico.com
  • Port:
    587
  • Username:
    reservaciones@hoteljuaninos.com.mx
  • Password:
    3}l^pI#_4K_!

Signatures

  • Snake Keylogger

    Keylogger and Infostealer first seen in November 2020.

  • Loads dropped DLL 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
  • 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
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Suspicious behavior: EnumeratesProcesses 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 11 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2345678098765T4323456789G.exe
    "C:\Users\Admin\AppData\Local\Temp\2345678098765T4323456789G.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1196
    • C:\Users\Admin\AppData\Local\Temp\2345678098765T4323456789G.exe
      "C:\Users\Admin\AppData\Local\Temp\2345678098765T4323456789G.exe"
      2⤵
      • Accesses Microsoft Outlook profiles
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • outlook_office_path
      • outlook_win_path
      PID:996

Network

MITRE ATT&CK Matrix ATT&CK v6

Credential Access

Credentials in Files

3
T1081

Discovery

System Information Discovery

1
T1082

Collection

Data from Local System

3
T1005

Email Collection

1
T1114

Replay Monitor

Loading Replay Monitor...

Downloads

  • \Users\Admin\AppData\Local\Temp\nstE274.tmp\cewfabb.dll
    MD5

    f8a026d82d5489d52431bd31696dd1a4

    SHA1

    20fcdfa194e2ad296af96ff2858ba8b00e08f0f3

    SHA256

    528093f58dfce70f6a41064ae7426fb4fbd5c19bd00af72d1ecdd788f0b1d753

    SHA512

    86eae47e8094b1c4fb24eaa9f1e223c54a9d69cffb2db3f16f49c3a980ad75990b23eadee75636777671227b893b4cbf5aa8b1e13d9e6d5a981f3831f0ded584

  • memory/996-57-0x0000000000400000-0x000000000044B000-memory.dmp
    Filesize

    300KB

  • memory/996-58-0x000000000040188B-mapping.dmp
  • memory/996-60-0x0000000000400000-0x000000000044B000-memory.dmp
    Filesize

    300KB

  • memory/996-61-0x0000000002180000-0x00000000021B6000-memory.dmp
    Filesize

    216KB

  • memory/996-63-0x0000000004511000-0x0000000004512000-memory.dmp
    Filesize

    4KB

  • memory/996-65-0x0000000004513000-0x0000000004514000-memory.dmp
    Filesize

    4KB

  • memory/996-64-0x0000000004512000-0x0000000004513000-memory.dmp
    Filesize

    4KB

  • memory/996-66-0x0000000004514000-0x0000000004515000-memory.dmp
    Filesize

    4KB

  • memory/1196-55-0x0000000075801000-0x0000000075803000-memory.dmp
    Filesize

    8KB