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Analysis

  • max time kernel
    91s
  • max time network
    176s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    19/10/2022, 06:10

General

  • Target

    Withdrawal Authorization Letter.exe

  • Size

    882KB

  • MD5

    ab51fcab2443142fb70bb50872407815

  • SHA1

    c50331ac38b78963d45230c57927c18be34638e9

  • SHA256

    1f9a0cce25f1860e53b471745a001b8d868ce4d96c3d5365c6c3d39c8b7ceb04

  • SHA512

    2d7f8c53add06e86528d12899565ee0c848f20903c9092b2bff1e3a4c842343fd82c66801d43e90bf0e111b9465bd59bffe5f8619daf989631954f92b3c64756

  • SSDEEP

    12288:i6WTGfEuEKW/CyXfwA/7k35yVHLnVheEEcIc/aZLBNcKii/ARh:eZKwCkfL/AGqHlciugg

Malware Config

Extracted

Family

snakekeylogger

Credentials

Signatures

  • Snake Keylogger

    Keylogger and Infostealer first seen in November 2020.

  • Snake Keylogger payload 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 1 IoCs

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

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

Processes

  • C:\Users\Admin\AppData\Local\Temp\Withdrawal Authorization Letter.exe
    "C:\Users\Admin\AppData\Local\Temp\Withdrawal Authorization Letter.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1244
    • C:\Users\Admin\AppData\Local\Temp\Withdrawal Authorization Letter.exe
      "C:\Users\Admin\AppData\Local\Temp\Withdrawal Authorization Letter.exe"
      2⤵
      • Accesses Microsoft Outlook profiles
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • outlook_office_path
      • outlook_win_path
      PID:3528

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads

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

    Filesize

    1KB

    MD5

    e08f822522c617a40840c62e4b0fb45e

    SHA1

    ae516dca4da5234be6676d3f234c19ec55725be7

    SHA256

    bd9d5e9f7fe6fcff17d873555d4077d15f7d6cdda1183e7f7d278b735ffe1fd7

    SHA512

    894a7fb7bbc18ac6ba13378f58a7db80ad00d6080be9a66b01cae8e23e41d9d2d4cd53c1e20669356b73590c8a3ebfda4bdda3258f81240db56c4a81b7313fe4

  • memory/1244-132-0x0000000000650000-0x0000000000734000-memory.dmp

    Filesize

    912KB

  • memory/1244-133-0x00000000055E0000-0x0000000005B84000-memory.dmp

    Filesize

    5.6MB

  • memory/1244-134-0x00000000050D0000-0x0000000005162000-memory.dmp

    Filesize

    584KB

  • memory/1244-135-0x0000000005180000-0x000000000518A000-memory.dmp

    Filesize

    40KB

  • memory/1244-136-0x0000000007AB0000-0x0000000007B4C000-memory.dmp

    Filesize

    624KB

  • memory/1244-137-0x000000000B560000-0x000000000B5C6000-memory.dmp

    Filesize

    408KB

  • memory/3528-139-0x0000000000400000-0x0000000000426000-memory.dmp

    Filesize

    152KB

  • memory/3528-141-0x0000000006370000-0x0000000006532000-memory.dmp

    Filesize

    1.8MB