Analysis

  • max time kernel
    101s
  • max time network
    137s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    16-03-2023 16:18

General

  • Target

    BANK SWIFT.xls

  • Size

    169KB

  • MD5

    de538eed80d8fd3d08ca320457cc5fef

  • SHA1

    3880dcaebb4805aa968c118ceabc351d18ed27df

  • SHA256

    dc0b46a0add517f632937b605ff9d0820f8fefaf1e886c1ad3d0054d50a2a53e

  • SHA512

    1078f55767a5476f83ee529ae552a68c5fb71ed54258f13350304d795ca7f1127431fd66b283b3f5cafc5283371c8f2f3f37ac5844578ae8270574913cb66c93

  • SSDEEP

    3072:gkZ+RwPONXoRjDhIcp0fDlaGGx+cL26nAHeN2E:NZ+RwPONXoRjDhIcp0fDlavx+W26nAHc

Malware Config

Extracted

Family

agenttesla

C2

https://api.telegram.org/bot2134979594:AAFk4QkrlHlt2a-q-EhIoHZBbzxSH0QxiBI/

Signatures

  • AgentTesla

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

  • Blocklisted process makes network request 1 IoCs
  • Downloads MZ/PE file
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 1 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 2 IoCs

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

  • Suspicious use of SetThreadContext 1 IoCs
  • 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 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 3 IoCs
  • Suspicious use of WriteProcessMemory 16 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\BANK SWIFT.xls"
    1⤵
    • Enumerates system info in registry
    • Modifies Internet Explorer settings
    • Modifies registry class
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious use of SetWindowsHookEx
    PID:1924
  • 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:544
    • C:\Users\Public\vbc.exe
      "C:\Users\Public\vbc.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetThreadContext
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1788
      • 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 use of AdjustPrivilegeToken
        • outlook_office_path
        • outlook_win_path
        PID:1392

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Public\vbc.exe

    Filesize

    918KB

    MD5

    d32379fe6c71914d1e060b828c39d69f

    SHA1

    de0172e5fed3c2b65e5a6b2a57ae1385ffe703e5

    SHA256

    9f7bc16e3e1f2dd542f8de4d732c19b89e54a7e0924b36274f087aa329359767

    SHA512

    4a26b12485fc43f707f9fb89da3f460d8a678c22c1affc02129c03bef50724fbfbb7c6d6e185396186cbffa0ebfc534bfa820e70fa0d9d87eff66b5133eb17bd

  • C:\Users\Public\vbc.exe

    Filesize

    918KB

    MD5

    d32379fe6c71914d1e060b828c39d69f

    SHA1

    de0172e5fed3c2b65e5a6b2a57ae1385ffe703e5

    SHA256

    9f7bc16e3e1f2dd542f8de4d732c19b89e54a7e0924b36274f087aa329359767

    SHA512

    4a26b12485fc43f707f9fb89da3f460d8a678c22c1affc02129c03bef50724fbfbb7c6d6e185396186cbffa0ebfc534bfa820e70fa0d9d87eff66b5133eb17bd

  • C:\Users\Public\vbc.exe

    Filesize

    918KB

    MD5

    d32379fe6c71914d1e060b828c39d69f

    SHA1

    de0172e5fed3c2b65e5a6b2a57ae1385ffe703e5

    SHA256

    9f7bc16e3e1f2dd542f8de4d732c19b89e54a7e0924b36274f087aa329359767

    SHA512

    4a26b12485fc43f707f9fb89da3f460d8a678c22c1affc02129c03bef50724fbfbb7c6d6e185396186cbffa0ebfc534bfa820e70fa0d9d87eff66b5133eb17bd

  • \Users\Public\vbc.exe

    Filesize

    918KB

    MD5

    d32379fe6c71914d1e060b828c39d69f

    SHA1

    de0172e5fed3c2b65e5a6b2a57ae1385ffe703e5

    SHA256

    9f7bc16e3e1f2dd542f8de4d732c19b89e54a7e0924b36274f087aa329359767

    SHA512

    4a26b12485fc43f707f9fb89da3f460d8a678c22c1affc02129c03bef50724fbfbb7c6d6e185396186cbffa0ebfc534bfa820e70fa0d9d87eff66b5133eb17bd

  • memory/1392-83-0x0000000004600000-0x0000000004640000-memory.dmp

    Filesize

    256KB

  • memory/1392-101-0x0000000004600000-0x0000000004640000-memory.dmp

    Filesize

    256KB

  • memory/1392-74-0x0000000000400000-0x0000000000430000-memory.dmp

    Filesize

    192KB

  • memory/1392-82-0x0000000000400000-0x0000000000430000-memory.dmp

    Filesize

    192KB

  • memory/1392-80-0x0000000000400000-0x0000000000430000-memory.dmp

    Filesize

    192KB

  • memory/1392-77-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/1392-78-0x0000000000400000-0x0000000000430000-memory.dmp

    Filesize

    192KB

  • memory/1392-75-0x0000000000400000-0x0000000000430000-memory.dmp

    Filesize

    192KB

  • memory/1392-76-0x0000000000400000-0x0000000000430000-memory.dmp

    Filesize

    192KB

  • memory/1392-73-0x0000000000400000-0x0000000000430000-memory.dmp

    Filesize

    192KB

  • memory/1788-66-0x0000000001330000-0x0000000001370000-memory.dmp

    Filesize

    256KB

  • memory/1788-72-0x0000000000680000-0x00000000006DA000-memory.dmp

    Filesize

    360KB

  • memory/1788-71-0x0000000000500000-0x0000000000508000-memory.dmp

    Filesize

    32KB

  • memory/1788-70-0x00000000058B0000-0x0000000005982000-memory.dmp

    Filesize

    840KB

  • memory/1788-69-0x0000000000260000-0x000000000026C000-memory.dmp

    Filesize

    48KB

  • memory/1788-68-0x0000000001330000-0x0000000001370000-memory.dmp

    Filesize

    256KB

  • memory/1788-67-0x0000000000240000-0x000000000025E000-memory.dmp

    Filesize

    120KB

  • memory/1788-65-0x0000000001370000-0x000000000145C000-memory.dmp

    Filesize

    944KB

  • memory/1924-54-0x000000005FFF0000-0x0000000060000000-memory.dmp

    Filesize

    64KB

  • memory/1924-102-0x000000005FFF0000-0x0000000060000000-memory.dmp

    Filesize

    64KB