Analysis

  • max time kernel
    111s
  • max time network
    52s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    23-11-2022 12:54

General

  • Target

    has been verified. However PDF, IMG, docx, .xls

  • Size

    1.0MB

  • MD5

    b18fd4de724718b8d1fa887d94731da4

  • SHA1

    97377a93c7fe211badd89a8a3f6ac46e85ae1926

  • SHA256

    86fdff90584064c135a98f05986da5a03bd67abe414f1d8f5fbdbf4249430019

  • SHA512

    ec54ded9bb21cb3b653ae3835960306d4b809dd353a365c21ed932845b20b7b30f80fb1c6e039fbfa06cd828d6fb5a8e28be73293b940bada5d2a378d21622cf

  • SSDEEP

    24576:Qr5XXXXXXXXXXXXUXXXXXXXSXXXXXXXXhmpr5XXXXXXXXXXXXUXXXXXXXSXXXXXL:kxuzt

Score
8/10

Malware Config

Signatures

  • Blocklisted process makes network request 1 IoCs
  • Downloads MZ/PE file
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 4 IoCs
  • Uses the VBS compiler for execution 1 TTPs
  • Enumerates physical storage devices 1 TTPs

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

  • NSIS installer 10 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 use of SetWindowsHookEx 5 IoCs
  • Suspicious use of WriteProcessMemory 4 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\has been verified. However PDF, IMG, docx, .xls"
    1⤵
    • Enumerates system info in registry
    • Modifies Internet Explorer settings
    • Modifies registry class
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious use of SetWindowsHookEx
    PID:1160
  • 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:1516
    • C:\Users\Public\vbc.exe
      "C:\Users\Public\vbc.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      PID:1040

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Public\vbc.exe

    Filesize

    468KB

    MD5

    5b4465cfb2d3997196eed7ab071b589b

    SHA1

    058739320d78d0cf2f87b4d0ec5a4302bcab4b34

    SHA256

    db4dac44ca7c790882a283cbe1c0f63c02be17f9384b45f17b768d60f0aa34d3

    SHA512

    13f409edd842ab3a74b953d4deed2b5853acf10e042b8524477c546eae3433633bb2bd2cd388a3cf94e05bad409793fa0e387cab14e14a7b1e451a0df5046ade

  • C:\Users\Public\vbc.exe

    Filesize

    468KB

    MD5

    5b4465cfb2d3997196eed7ab071b589b

    SHA1

    058739320d78d0cf2f87b4d0ec5a4302bcab4b34

    SHA256

    db4dac44ca7c790882a283cbe1c0f63c02be17f9384b45f17b768d60f0aa34d3

    SHA512

    13f409edd842ab3a74b953d4deed2b5853acf10e042b8524477c546eae3433633bb2bd2cd388a3cf94e05bad409793fa0e387cab14e14a7b1e451a0df5046ade

  • \Users\Admin\AppData\Local\Temp\nsj2686.tmp\System.dll

    Filesize

    11KB

    MD5

    6ad39193ed20078aa1b23c33a1e48859

    SHA1

    95e70e4f47aa1689cc08afbdaef3ec323b5342fa

    SHA256

    b9631423a50c666faf2cc6901c5a8d6eb2fecd306fdd2524256b7e2e37b251c2

    SHA512

    78c89bb8c86f3b68e5314467eca4e8e922d143335081fa66b01d756303e1aec68ed01f4be7098dbe06a789ca32a0f31102f5ba408bc5ab28e61251611bb4f62b

  • \Users\Public\vbc.exe

    Filesize

    468KB

    MD5

    5b4465cfb2d3997196eed7ab071b589b

    SHA1

    058739320d78d0cf2f87b4d0ec5a4302bcab4b34

    SHA256

    db4dac44ca7c790882a283cbe1c0f63c02be17f9384b45f17b768d60f0aa34d3

    SHA512

    13f409edd842ab3a74b953d4deed2b5853acf10e042b8524477c546eae3433633bb2bd2cd388a3cf94e05bad409793fa0e387cab14e14a7b1e451a0df5046ade

  • \Users\Public\vbc.exe

    Filesize

    468KB

    MD5

    5b4465cfb2d3997196eed7ab071b589b

    SHA1

    058739320d78d0cf2f87b4d0ec5a4302bcab4b34

    SHA256

    db4dac44ca7c790882a283cbe1c0f63c02be17f9384b45f17b768d60f0aa34d3

    SHA512

    13f409edd842ab3a74b953d4deed2b5853acf10e042b8524477c546eae3433633bb2bd2cd388a3cf94e05bad409793fa0e387cab14e14a7b1e451a0df5046ade

  • \Users\Public\vbc.exe

    Filesize

    468KB

    MD5

    5b4465cfb2d3997196eed7ab071b589b

    SHA1

    058739320d78d0cf2f87b4d0ec5a4302bcab4b34

    SHA256

    db4dac44ca7c790882a283cbe1c0f63c02be17f9384b45f17b768d60f0aa34d3

    SHA512

    13f409edd842ab3a74b953d4deed2b5853acf10e042b8524477c546eae3433633bb2bd2cd388a3cf94e05bad409793fa0e387cab14e14a7b1e451a0df5046ade

  • memory/1040-64-0x0000000000000000-mapping.dmp

  • memory/1040-69-0x0000000002580000-0x00000000026DC000-memory.dmp

    Filesize

    1.4MB

  • memory/1160-60-0x000000007215D000-0x0000000072168000-memory.dmp

    Filesize

    44KB

  • memory/1160-58-0x0000000075A91000-0x0000000075A93000-memory.dmp

    Filesize

    8KB

  • memory/1160-54-0x000000002F731000-0x000000002F734000-memory.dmp

    Filesize

    12KB

  • memory/1160-57-0x000000007215D000-0x0000000072168000-memory.dmp

    Filesize

    44KB

  • memory/1160-56-0x000000005FFF0000-0x0000000060000000-memory.dmp

    Filesize

    64KB

  • memory/1160-55-0x0000000071171000-0x0000000071173000-memory.dmp

    Filesize

    8KB

  • memory/1160-70-0x000000005FFF0000-0x0000000060000000-memory.dmp

    Filesize

    64KB

  • memory/1160-71-0x000000007215D000-0x0000000072168000-memory.dmp

    Filesize

    44KB