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Analysis

  • max time kernel
    102s
  • max time network
    30s
  • platform
    windows7_x64
  • resource
    win7-20221111-en
  • resource tags

    arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
  • submitted
    30/01/2023, 11:49

General

  • Target

    Order-Requirment.xls

  • Size

    1.3MB

  • MD5

    e71fb1473574eff602a8f8a1ef401c2b

  • SHA1

    dd5150036679b7a5b441c01c5cf5fca995466f8f

  • SHA256

    d4ca63a0241df852dd25c935565b3f36db27cb7744d4b5da45c1d0a9d0963218

  • SHA512

    f8598619db9e8538f767a4328b1045f69bbc0b2a92988ec177690166231e620c6854764324595ab678a2c7aa6e2e92bc19e9a6d75f5ec91eb9217fce04de8be3

  • SSDEEP

    24576:1LKMZyOZy8LKNZyeZybQ8ToW0cwmnAoNapt:1LK+5zLK3h2jTVwmPNO

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
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • 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\Order-Requirment.xls
    1⤵
    • Enumerates system info in registry
    • Modifies Internet Explorer settings
    • Modifies registry class
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious use of SetWindowsHookEx
    PID:852
  • 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:1128
    • C:\Users\Public\vbc.exe
      "C:\Users\Public\vbc.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      PID:1832

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Users\Public\vbc.exe

    Filesize

    725KB

    MD5

    b91ffb9474fb93a6d5b2aa7e4e8d9cc2

    SHA1

    f90e0af49ea78e00b70f26a359b5996ce7507967

    SHA256

    3e5d0f62aaa27d6ac1ae77dae9024d263e52ca8d816810715dfe2b71b4763e69

    SHA512

    6df1e36027d5bab83147e5c937f535785ef151aa34a5c2369467343293275cc7daf9e88fe3a0a6f053b020eeb7427a09a0b72e22c2a2baa88b77b666ddbaf67b

  • C:\Users\Public\vbc.exe

    Filesize

    725KB

    MD5

    b91ffb9474fb93a6d5b2aa7e4e8d9cc2

    SHA1

    f90e0af49ea78e00b70f26a359b5996ce7507967

    SHA256

    3e5d0f62aaa27d6ac1ae77dae9024d263e52ca8d816810715dfe2b71b4763e69

    SHA512

    6df1e36027d5bab83147e5c937f535785ef151aa34a5c2369467343293275cc7daf9e88fe3a0a6f053b020eeb7427a09a0b72e22c2a2baa88b77b666ddbaf67b

  • \Users\Admin\AppData\Local\Temp\nso44DF.tmp\System.dll

    Filesize

    11KB

    MD5

    b8992e497d57001ddf100f9c397fcef5

    SHA1

    e26ddf101a2ec5027975d2909306457c6f61cfbd

    SHA256

    98bcd1dd88642f4dd36a300c76ebb1ddfbbbc5bfc7e3b6d7435dc6d6e030c13b

    SHA512

    8823b1904dccfaf031068102cb1def7958a057f49ff369f0e061f1b4db2090021aa620bb8442a2a6ac9355bb74ee54371dc2599c20dc723755a46ede81533a3c

  • \Users\Public\vbc.exe

    Filesize

    725KB

    MD5

    b91ffb9474fb93a6d5b2aa7e4e8d9cc2

    SHA1

    f90e0af49ea78e00b70f26a359b5996ce7507967

    SHA256

    3e5d0f62aaa27d6ac1ae77dae9024d263e52ca8d816810715dfe2b71b4763e69

    SHA512

    6df1e36027d5bab83147e5c937f535785ef151aa34a5c2369467343293275cc7daf9e88fe3a0a6f053b020eeb7427a09a0b72e22c2a2baa88b77b666ddbaf67b

  • \Users\Public\vbc.exe

    Filesize

    725KB

    MD5

    b91ffb9474fb93a6d5b2aa7e4e8d9cc2

    SHA1

    f90e0af49ea78e00b70f26a359b5996ce7507967

    SHA256

    3e5d0f62aaa27d6ac1ae77dae9024d263e52ca8d816810715dfe2b71b4763e69

    SHA512

    6df1e36027d5bab83147e5c937f535785ef151aa34a5c2369467343293275cc7daf9e88fe3a0a6f053b020eeb7427a09a0b72e22c2a2baa88b77b666ddbaf67b

  • \Users\Public\vbc.exe

    Filesize

    725KB

    MD5

    b91ffb9474fb93a6d5b2aa7e4e8d9cc2

    SHA1

    f90e0af49ea78e00b70f26a359b5996ce7507967

    SHA256

    3e5d0f62aaa27d6ac1ae77dae9024d263e52ca8d816810715dfe2b71b4763e69

    SHA512

    6df1e36027d5bab83147e5c937f535785ef151aa34a5c2369467343293275cc7daf9e88fe3a0a6f053b020eeb7427a09a0b72e22c2a2baa88b77b666ddbaf67b

  • memory/852-68-0x0000000072AED000-0x0000000072AF8000-memory.dmp

    Filesize

    44KB

  • memory/852-58-0x0000000072AED000-0x0000000072AF8000-memory.dmp

    Filesize

    44KB

  • memory/852-57-0x0000000075FF1000-0x0000000075FF3000-memory.dmp

    Filesize

    8KB

  • memory/852-56-0x000000005FFF0000-0x0000000060000000-memory.dmp

    Filesize

    64KB

  • memory/852-55-0x0000000071B01000-0x0000000071B03000-memory.dmp

    Filesize

    8KB

  • memory/852-54-0x000000002FAC1000-0x000000002FAC4000-memory.dmp

    Filesize

    12KB

  • memory/852-70-0x000000005FFF0000-0x0000000060000000-memory.dmp

    Filesize

    64KB

  • memory/852-71-0x0000000072AED000-0x0000000072AF8000-memory.dmp

    Filesize

    44KB

  • memory/1832-69-0x0000000002F80000-0x00000000030DC000-memory.dmp

    Filesize

    1.4MB