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Analysis

  • max time kernel
    102s
  • max time network
    33s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    15/03/2023, 07:39

General

  • Target

    SKM_C33501.xls

  • Size

    1.5MB

  • MD5

    17aa75488c665ffa62cc727538478d6c

  • SHA1

    91b4c527f418db0caa4a6eb6cb89dfc9c15dd71a

  • SHA256

    afa6b89c9edf7e5e8dfd42cb8eec0979cac4f3bd7c800abf95e26468d7a1b019

  • SHA512

    65da7caef1d6185ef475aec4c89e2b3b9f8376bf8782f7ebe494476096c965722a6b41bd7fbe80615fe3d966fa2bf6a96624ec0e1bd2f4f76ff6a23a970c1253

  • SSDEEP

    24576:3LKzZyH7GpZyiZBvZyF6J5M6J5YZyAYaEXAZy8lCRUQZy6LJlMATIBK11:3LKVVp7Vs+rCXCrnz7Tl1

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 6 IoCs
  • Uses the VBS compiler for execution 1 TTPs
  • Program crash 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 use of SetWindowsHookEx 3 IoCs
  • Suspicious use of WriteProcessMemory 8 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\SKM_C33501.xls
    1⤵
    • Enumerates system info in registry
    • Modifies Internet Explorer settings
    • Modifies registry class
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious use of SetWindowsHookEx
    PID:308
  • 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:980
    • C:\Users\Public\vbc.exe
      "C:\Users\Public\vbc.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of WriteProcessMemory
      PID:1828
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 1828 -s 652
        3⤵
        • Loads dropped DLL
        • Program crash
        PID:1304

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.MSO\8AEE2F3D.emf

    Filesize

    1.4MB

    MD5

    a01b9617553432807b9b58025b338d97

    SHA1

    439bdcc450408b9735b2428c2d53d2e6977fa58c

    SHA256

    7a0426ed2e2349916969ff7087c0f76089fb8ce7f4627f3d11ccbc1aaefcedce

    SHA512

    312cc2563fa865d6a939fea85a520627c73ed9a95bafc98c89495f21d535dc658825be74b64f0f5c5815d1d234fc6e77a71779247e4973e39ba8dccec2f09bee

  • C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.MSO\A606F92C.emf

    Filesize

    95KB

    MD5

    19a772169cff739748296bb34783829b

    SHA1

    529a942b470a0ecebdeba4e824602f6cfdabbfc5

    SHA256

    dcedfae56b9e0bfff7251bb222e6759c6512b90484c6a9a0d62d91a52c9b5251

    SHA512

    bf07901403108300cbb1f6d602f2fce0967841ec623e62f15157e0e86eb3e62713b1dab1161f54d7343a82184b5dda2f0237a90954bf4f195ed268774d6ada85

  • C:\Users\Public\vbc.exe

    Filesize

    753KB

    MD5

    2ff8305b61e27485d5ce6fd583c14397

    SHA1

    1dd31a165381e4f21119e1771a3fea2aba8d2e3c

    SHA256

    b10347510cb12fe19b5673f542543054fd352bc438af283db3560be0cb2e8a2d

    SHA512

    a3c0412f0a54480aeb536f56e83aae04ccd9d47973f1dd233d47c980525aca9acf0d82e7b53f132a83091c5f815252bc6212c8162c1a5938c37993725ace0e77

  • C:\Users\Public\vbc.exe

    Filesize

    753KB

    MD5

    2ff8305b61e27485d5ce6fd583c14397

    SHA1

    1dd31a165381e4f21119e1771a3fea2aba8d2e3c

    SHA256

    b10347510cb12fe19b5673f542543054fd352bc438af283db3560be0cb2e8a2d

    SHA512

    a3c0412f0a54480aeb536f56e83aae04ccd9d47973f1dd233d47c980525aca9acf0d82e7b53f132a83091c5f815252bc6212c8162c1a5938c37993725ace0e77

  • C:\Users\Public\vbc.exe

    Filesize

    753KB

    MD5

    2ff8305b61e27485d5ce6fd583c14397

    SHA1

    1dd31a165381e4f21119e1771a3fea2aba8d2e3c

    SHA256

    b10347510cb12fe19b5673f542543054fd352bc438af283db3560be0cb2e8a2d

    SHA512

    a3c0412f0a54480aeb536f56e83aae04ccd9d47973f1dd233d47c980525aca9acf0d82e7b53f132a83091c5f815252bc6212c8162c1a5938c37993725ace0e77

  • \Users\Public\vbc.exe

    Filesize

    753KB

    MD5

    2ff8305b61e27485d5ce6fd583c14397

    SHA1

    1dd31a165381e4f21119e1771a3fea2aba8d2e3c

    SHA256

    b10347510cb12fe19b5673f542543054fd352bc438af283db3560be0cb2e8a2d

    SHA512

    a3c0412f0a54480aeb536f56e83aae04ccd9d47973f1dd233d47c980525aca9acf0d82e7b53f132a83091c5f815252bc6212c8162c1a5938c37993725ace0e77

  • \Users\Public\vbc.exe

    Filesize

    753KB

    MD5

    2ff8305b61e27485d5ce6fd583c14397

    SHA1

    1dd31a165381e4f21119e1771a3fea2aba8d2e3c

    SHA256

    b10347510cb12fe19b5673f542543054fd352bc438af283db3560be0cb2e8a2d

    SHA512

    a3c0412f0a54480aeb536f56e83aae04ccd9d47973f1dd233d47c980525aca9acf0d82e7b53f132a83091c5f815252bc6212c8162c1a5938c37993725ace0e77

  • \Users\Public\vbc.exe

    Filesize

    753KB

    MD5

    2ff8305b61e27485d5ce6fd583c14397

    SHA1

    1dd31a165381e4f21119e1771a3fea2aba8d2e3c

    SHA256

    b10347510cb12fe19b5673f542543054fd352bc438af283db3560be0cb2e8a2d

    SHA512

    a3c0412f0a54480aeb536f56e83aae04ccd9d47973f1dd233d47c980525aca9acf0d82e7b53f132a83091c5f815252bc6212c8162c1a5938c37993725ace0e77

  • \Users\Public\vbc.exe

    Filesize

    753KB

    MD5

    2ff8305b61e27485d5ce6fd583c14397

    SHA1

    1dd31a165381e4f21119e1771a3fea2aba8d2e3c

    SHA256

    b10347510cb12fe19b5673f542543054fd352bc438af283db3560be0cb2e8a2d

    SHA512

    a3c0412f0a54480aeb536f56e83aae04ccd9d47973f1dd233d47c980525aca9acf0d82e7b53f132a83091c5f815252bc6212c8162c1a5938c37993725ace0e77

  • \Users\Public\vbc.exe

    Filesize

    753KB

    MD5

    2ff8305b61e27485d5ce6fd583c14397

    SHA1

    1dd31a165381e4f21119e1771a3fea2aba8d2e3c

    SHA256

    b10347510cb12fe19b5673f542543054fd352bc438af283db3560be0cb2e8a2d

    SHA512

    a3c0412f0a54480aeb536f56e83aae04ccd9d47973f1dd233d47c980525aca9acf0d82e7b53f132a83091c5f815252bc6212c8162c1a5938c37993725ace0e77

  • \Users\Public\vbc.exe

    Filesize

    753KB

    MD5

    2ff8305b61e27485d5ce6fd583c14397

    SHA1

    1dd31a165381e4f21119e1771a3fea2aba8d2e3c

    SHA256

    b10347510cb12fe19b5673f542543054fd352bc438af283db3560be0cb2e8a2d

    SHA512

    a3c0412f0a54480aeb536f56e83aae04ccd9d47973f1dd233d47c980525aca9acf0d82e7b53f132a83091c5f815252bc6212c8162c1a5938c37993725ace0e77

  • memory/308-54-0x000000005FFF0000-0x0000000060000000-memory.dmp

    Filesize

    64KB

  • memory/308-83-0x000000005FFF0000-0x0000000060000000-memory.dmp

    Filesize

    64KB

  • memory/1828-79-0x0000000004DF0000-0x0000000004E30000-memory.dmp

    Filesize

    256KB

  • memory/1828-69-0x0000000004DF0000-0x0000000004E30000-memory.dmp

    Filesize

    256KB

  • memory/1828-68-0x0000000000F70000-0x0000000001032000-memory.dmp

    Filesize

    776KB