Analysis

  • max time kernel
    148s
  • max time network
    150s
  • platform
    windows7_x64
  • resource
    win7-20220414-en
  • submitted
    05-07-2022 12:14

General

  • Target

    88160011B.xlsx

  • Size

    39KB

  • MD5

    bb45f31acbfa03dcf30c1ef037a607e2

  • SHA1

    4539a5f55990c8490f39d0724e372ba66bdbf903

  • SHA256

    4da0fa732b3cb2b77f92db9ed169eae7606d5646aa38dbaf9667565556b3e223

  • SHA512

    5290df186c6312a68bb81429a19bb8eee06b71bdbe5b9d7e1ebc4ceca87ef7021d463b2a38f1e9388859fc63a6bd112e6f3f358ff251f0ffdae8e9ffd420bf62

Malware Config

Extracted

Family

snakekeylogger

Credentials

  • Protocol:
    smtp
  • Host:
    mail.stilltech.ro
  • Port:
    587
  • Username:
    office@stilltech.ro
  • Password:
    eurobit555ro
  • Email To:
    graceunlimited153@gmail.com

Signatures

  • Snake Keylogger

    Keylogger and Infostealer first seen in November 2020.

  • Snake Keylogger Payload 6 IoCs
  • suricata: ET MALWARE MSIL/GenKryptik.FQRH Download Request

    suricata: ET MALWARE MSIL/GenKryptik.FQRH Download Request

  • suricata: ET MALWARE Terse alphanumeric executable downloader high likelihood of being hostile

    suricata: ET MALWARE Terse alphanumeric executable downloader high likelihood of being hostile

  • Blocklisted process makes network request 1 IoCs
  • Downloads MZ/PE file
  • Executes dropped EXE 1 IoCs
  • Abuses OpenXML format to download file from external location
  • Loads dropped DLL 4 IoCs
  • Uses the VBS compiler for execution 1 TTPs
  • 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
  • Office loads VBA resources, possible macro or embedded object present
  • Enumerates system info in registry 2 TTPs 1 IoCs
  • Launches Equation Editor 1 TTPs 1 IoCs

    Equation Editor is an old Office component often targeted by exploits such as CVE-2017-11882.

  • Modifies Internet Explorer settings 1 TTPs 31 IoCs
  • Modifies registry class 64 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 5 IoCs
  • Suspicious use of WriteProcessMemory 20 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE
    "C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE" /dde C:\Users\Admin\AppData\Local\Temp\88160011B.xlsx
    1⤵
    • Enumerates system info in registry
    • Modifies Internet Explorer settings
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious use of SetWindowsHookEx
    PID:1892
  • C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE
    "C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE" -Embedding
    1⤵
    • Modifies Internet Explorer settings
    • Modifies registry class
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:1660
    • C:\Windows\splwow64.exe
      C:\Windows\splwow64.exe 12288
      2⤵
        PID:1576
    • C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE
      "C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE" -Embedding
      1⤵
      • Blocklisted process makes network request
      • Loads dropped DLL
      • Launches Equation Editor
      • Suspicious use of WriteProcessMemory
      PID:1220
      • C:\Users\Public\vbc.exe
        "C:\Users\Public\vbc.exe"
        2⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:520
        • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
          "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe"
          3⤵
          • Accesses Microsoft Outlook profiles
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • outlook_office_path
          • outlook_win_path
          PID:1808

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Execution

    Scripting

    1
    T1064

    Exploitation for Client Execution

    1
    T1203

    Defense Evasion

    Scripting

    1
    T1064

    Modify Registry

    1
    T1112

    Discovery

    Query Registry

    1
    T1012

    System Information Discovery

    1
    T1082

    Collection

    Email Collection

    1
    T1114

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\V789HYVY\receipt[1].doc
      Filesize

      20KB

      MD5

      8531e389071583bf24756116a1770018

      SHA1

      e99795a4a4cf509a4d8efec6c573e3be4b3477db

      SHA256

      4aa2cd3f90eb232a9ea09d5e49fa1b94a038313bb482faecd2961778174f8e88

      SHA512

      c117d141b0d03da382b10ba567532dc3b6d9768f5bc71193da6ebec0b47cc030bdfd0ef7d0a110c28daacc2d6be2a723de0001476104503ae66089a864bb5fe0

    • C:\Users\Public\vbc.exe
      Filesize

      561KB

      MD5

      c01e2956b20349d01fd6f43f9a7ef0c3

      SHA1

      4799db2196420cc90b24e28519ed459119d71fca

      SHA256

      f479546b3b39902eed49ccdd2749bde0d6ffb260311f8a8240fa69700e2a200e

      SHA512

      e3b466d2e32b1b3e18cc8669f957cf8dc66ca85827a2f40083931e0d72da8f67d8b01b71fea9bd8f601143d071f729184b9685198a974c247aaac7958141f469

    • C:\Users\Public\vbc.exe
      Filesize

      561KB

      MD5

      c01e2956b20349d01fd6f43f9a7ef0c3

      SHA1

      4799db2196420cc90b24e28519ed459119d71fca

      SHA256

      f479546b3b39902eed49ccdd2749bde0d6ffb260311f8a8240fa69700e2a200e

      SHA512

      e3b466d2e32b1b3e18cc8669f957cf8dc66ca85827a2f40083931e0d72da8f67d8b01b71fea9bd8f601143d071f729184b9685198a974c247aaac7958141f469

    • \Users\Public\vbc.exe
      Filesize

      561KB

      MD5

      c01e2956b20349d01fd6f43f9a7ef0c3

      SHA1

      4799db2196420cc90b24e28519ed459119d71fca

      SHA256

      f479546b3b39902eed49ccdd2749bde0d6ffb260311f8a8240fa69700e2a200e

      SHA512

      e3b466d2e32b1b3e18cc8669f957cf8dc66ca85827a2f40083931e0d72da8f67d8b01b71fea9bd8f601143d071f729184b9685198a974c247aaac7958141f469

    • \Users\Public\vbc.exe
      Filesize

      561KB

      MD5

      c01e2956b20349d01fd6f43f9a7ef0c3

      SHA1

      4799db2196420cc90b24e28519ed459119d71fca

      SHA256

      f479546b3b39902eed49ccdd2749bde0d6ffb260311f8a8240fa69700e2a200e

      SHA512

      e3b466d2e32b1b3e18cc8669f957cf8dc66ca85827a2f40083931e0d72da8f67d8b01b71fea9bd8f601143d071f729184b9685198a974c247aaac7958141f469

    • \Users\Public\vbc.exe
      Filesize

      561KB

      MD5

      c01e2956b20349d01fd6f43f9a7ef0c3

      SHA1

      4799db2196420cc90b24e28519ed459119d71fca

      SHA256

      f479546b3b39902eed49ccdd2749bde0d6ffb260311f8a8240fa69700e2a200e

      SHA512

      e3b466d2e32b1b3e18cc8669f957cf8dc66ca85827a2f40083931e0d72da8f67d8b01b71fea9bd8f601143d071f729184b9685198a974c247aaac7958141f469

    • \Users\Public\vbc.exe
      Filesize

      561KB

      MD5

      c01e2956b20349d01fd6f43f9a7ef0c3

      SHA1

      4799db2196420cc90b24e28519ed459119d71fca

      SHA256

      f479546b3b39902eed49ccdd2749bde0d6ffb260311f8a8240fa69700e2a200e

      SHA512

      e3b466d2e32b1b3e18cc8669f957cf8dc66ca85827a2f40083931e0d72da8f67d8b01b71fea9bd8f601143d071f729184b9685198a974c247aaac7958141f469

    • memory/520-78-0x00000000005A0000-0x00000000005C0000-memory.dmp
      Filesize

      128KB

    • memory/520-75-0x0000000000D90000-0x0000000000E22000-memory.dmp
      Filesize

      584KB

    • memory/520-80-0x0000000004BA0000-0x0000000004BAE000-memory.dmp
      Filesize

      56KB

    • memory/520-71-0x0000000000000000-mapping.dmp
    • memory/520-81-0x0000000005D20000-0x0000000005D8A000-memory.dmp
      Filesize

      424KB

    • memory/520-82-0x0000000005990000-0x00000000059B6000-memory.dmp
      Filesize

      152KB

    • memory/1576-74-0x0000000000000000-mapping.dmp
    • memory/1576-76-0x000007FEFBD51000-0x000007FEFBD53000-memory.dmp
      Filesize

      8KB

    • memory/1660-60-0x000000006B891000-0x000000006B894000-memory.dmp
      Filesize

      12KB

    • memory/1660-64-0x000000007252D000-0x0000000072538000-memory.dmp
      Filesize

      44KB

    • memory/1660-79-0x000000007252D000-0x0000000072538000-memory.dmp
      Filesize

      44KB

    • memory/1808-86-0x0000000000400000-0x0000000000426000-memory.dmp
      Filesize

      152KB

    • memory/1808-89-0x0000000000400000-0x0000000000426000-memory.dmp
      Filesize

      152KB

    • memory/1808-94-0x0000000000400000-0x0000000000426000-memory.dmp
      Filesize

      152KB

    • memory/1808-92-0x0000000000400000-0x0000000000426000-memory.dmp
      Filesize

      152KB

    • memory/1808-90-0x00000000004202AE-mapping.dmp
    • memory/1808-88-0x0000000000400000-0x0000000000426000-memory.dmp
      Filesize

      152KB

    • memory/1808-83-0x0000000000400000-0x0000000000426000-memory.dmp
      Filesize

      152KB

    • memory/1808-84-0x0000000000400000-0x0000000000426000-memory.dmp
      Filesize

      152KB

    • memory/1892-54-0x000000002F4E1000-0x000000002F4E4000-memory.dmp
      Filesize

      12KB

    • memory/1892-55-0x0000000071541000-0x0000000071543000-memory.dmp
      Filesize

      8KB

    • memory/1892-58-0x00000000753E1000-0x00000000753E3000-memory.dmp
      Filesize

      8KB

    • memory/1892-56-0x000000005FFF0000-0x0000000060000000-memory.dmp
      Filesize

      64KB

    • memory/1892-57-0x000000007252D000-0x0000000072538000-memory.dmp
      Filesize

      44KB

    • memory/1892-59-0x000000007252D000-0x0000000072538000-memory.dmp
      Filesize

      44KB