Analysis

  • max time kernel
    133s
  • max time network
    37s
  • platform
    windows7_x64
  • resource
    win7v20210410
  • submitted
    20-04-2021 18:50

General

  • Target

    FWREQUEST FOR URGENT QUOTATION RFQ.doc__.rtf

  • Size

    628KB

  • MD5

    7040850c5f29b143eebfe32b97a97ddc

  • SHA1

    20c428053d7d83ce23e7d6f3c48c4cd50e606ae3

  • SHA256

    53947cdc6ca591ccc866933e6d69a6861160325956ae0a284bb5d222f933e08e

  • SHA512

    827900885590850a2be455f6cbf6342535359ef2b132a6e12f7892dd038aeff0c80b1a3f08ca59b96ff2b6420372d34683c65d7b264374d0dfb597e5df300cef

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    utari.iixcp.rumahweb.com
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    #t.jTrXnOmWX

Signatures

  • AgentTesla

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

  • AgentTesla Payload 3 IoCs
  • Blocklisted process makes network request 1 IoCs
  • Downloads MZ/PE file
  • Executes dropped EXE 2 IoCs
  • 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.

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Drops file in Windows directory 1 IoCs
  • Office loads VBA resources, possible macro or embedded object present
  • 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 9 IoCs
  • Modifies system certificate store 2 TTPs 4 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 17 IoCs

Processes

  • C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE
    "C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE" /n "C:\Users\Admin\AppData\Local\Temp\FWREQUEST FOR URGENT QUOTATION RFQ.doc__.rtf"
    1⤵
    • Drops file in Windows directory
    • Modifies Internet Explorer settings
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:540
    • C:\Windows\splwow64.exe
      C:\Windows\splwow64.exe 12288
      2⤵
        PID:1472
    • 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:1792
      • C:\Users\Admin\AppData\Roaming\ugopound1825258.exe
        "C:\Users\Admin\AppData\Roaming\ugopound1825258.exe"
        2⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Modifies system certificate store
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:1160
        • C:\Users\Admin\AppData\Roaming\ugopound1825258.exe
          "C:\Users\Admin\AppData\Roaming\ugopound1825258.exe"
          3⤵
          • Executes dropped EXE
          • Adds Run key to start application
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of SetWindowsHookEx
          PID:1396

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Execution

    Exploitation for Client Execution

    1
    T1203

    Persistence

    Registry Run Keys / Startup Folder

    1
    T1060

    Defense Evasion

    Modify Registry

    3
    T1112

    Install Root Certificate

    1
    T1130

    Credential Access

    Credentials in Files

    3
    T1081

    Collection

    Data from Local System

    3
    T1005

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Roaming\ugopound1825258.exe
      MD5

      715bd23d518811ec970b9288cfb597c8

      SHA1

      ac72a4d1740020e2398a8c15e6d701b42a822767

      SHA256

      56fe9a0f74d14a3992855acd45b0f73f663abecc4066d39838218402a0555f73

      SHA512

      2c298f27a63cfc53b3f06dbaa28cb4065a99e22b07d2e6fc704ed0a31e6eb52cb774d66d81bfbed3fcb4351a620c8ca1eb108f03d3236685a22efa819d45d716

    • C:\Users\Admin\AppData\Roaming\ugopound1825258.exe
      MD5

      715bd23d518811ec970b9288cfb597c8

      SHA1

      ac72a4d1740020e2398a8c15e6d701b42a822767

      SHA256

      56fe9a0f74d14a3992855acd45b0f73f663abecc4066d39838218402a0555f73

      SHA512

      2c298f27a63cfc53b3f06dbaa28cb4065a99e22b07d2e6fc704ed0a31e6eb52cb774d66d81bfbed3fcb4351a620c8ca1eb108f03d3236685a22efa819d45d716

    • C:\Users\Admin\AppData\Roaming\ugopound1825258.exe
      MD5

      715bd23d518811ec970b9288cfb597c8

      SHA1

      ac72a4d1740020e2398a8c15e6d701b42a822767

      SHA256

      56fe9a0f74d14a3992855acd45b0f73f663abecc4066d39838218402a0555f73

      SHA512

      2c298f27a63cfc53b3f06dbaa28cb4065a99e22b07d2e6fc704ed0a31e6eb52cb774d66d81bfbed3fcb4351a620c8ca1eb108f03d3236685a22efa819d45d716

    • \Users\Admin\AppData\Roaming\ugopound1825258.exe
      MD5

      715bd23d518811ec970b9288cfb597c8

      SHA1

      ac72a4d1740020e2398a8c15e6d701b42a822767

      SHA256

      56fe9a0f74d14a3992855acd45b0f73f663abecc4066d39838218402a0555f73

      SHA512

      2c298f27a63cfc53b3f06dbaa28cb4065a99e22b07d2e6fc704ed0a31e6eb52cb774d66d81bfbed3fcb4351a620c8ca1eb108f03d3236685a22efa819d45d716

    • memory/540-60-0x000000006FF21000-0x000000006FF23000-memory.dmp
      Filesize

      8KB

    • memory/540-61-0x000000005FFF0000-0x0000000060000000-memory.dmp
      Filesize

      64KB

    • memory/540-80-0x000000005FFF0000-0x0000000060000000-memory.dmp
      Filesize

      64KB

    • memory/540-59-0x00000000724A1000-0x00000000724A4000-memory.dmp
      Filesize

      12KB

    • memory/1160-64-0x0000000000000000-mapping.dmp
    • memory/1160-70-0x0000000004E00000-0x0000000004E01000-memory.dmp
      Filesize

      4KB

    • memory/1160-71-0x00000000002E0000-0x0000000000320000-memory.dmp
      Filesize

      256KB

    • memory/1160-67-0x0000000001100000-0x0000000001101000-memory.dmp
      Filesize

      4KB

    • memory/1396-74-0x0000000000400000-0x000000000043C000-memory.dmp
      Filesize

      240KB

    • memory/1396-75-0x00000000004374BE-mapping.dmp
    • memory/1396-77-0x0000000000400000-0x000000000043C000-memory.dmp
      Filesize

      240KB

    • memory/1396-79-0x00000000004F0000-0x00000000004F1000-memory.dmp
      Filesize

      4KB

    • memory/1396-81-0x00000000004F1000-0x00000000004F2000-memory.dmp
      Filesize

      4KB

    • memory/1472-72-0x0000000000000000-mapping.dmp
    • memory/1472-73-0x000007FEFB9A1000-0x000007FEFB9A3000-memory.dmp
      Filesize

      8KB

    • memory/1792-62-0x0000000075A71000-0x0000000075A73000-memory.dmp
      Filesize

      8KB