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unit_tests/input/pe_allmatch/test-exe-src/README.md

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Overview

This aims to provide many different types of ClamAV rules for the given test.exe x86 Windows executable binary in order to test ClamAV's ability to report multiple signature matches (-z or --allmatch in clamscan).

  • src - contains the code necessary to rebuild the test.exe program.
  • alert-sigs are a combination of signatures generated by this tool, and those that were manually created.
    • As the name implies, these signatures are expected to alert on the text.exe program.
    • Some of these signatures depend on signatures in weak-sigs.
  • weak-sigs are a combination of signatures generated by this tool, and those that were manually created.
    • As the name implies, these signatures support the alert-sigs, but do not alert on their own.

The tools necessary to (re)generate those sigs that were generated are not included here.

Requirements

  • python3
  • mingw-w64
    • Just sudo apt install mingw-w64 on ubuntu 20.04
  • osslsigncode
    • The ubuntu package is dated, but it's pretty easy to install from https://github.com/mtrojnar/osslsigncode
      • Follow the directions for those prereqs.
      • Note: you can use these cmake commands:
        bash
        mkdir build && cd build
cmake .. && cmake --build .
sudo cmake --install . --prefix /usr/local/bin

Steps to regenerate the test.exe program

  1. Build the binary with: ./build.py

  2. Generate the signatures. First run:

    sh
    mkdir gen

    Then run:

    sh
    python generate.py build/test.exe

Testing:

  • Example invocation:
$ clamscan -z -d gen/ -d manual/ build/test.exe --bytecode-unsigned --no-summary | sort -n
test.exe: Test.GenSig.HSB_01of06_MD5_FIXED.UNOFFICIAL FOUND
test.exe: Test.GenSig.MSB_01of90_MD5_FIXED_dottext.UNOFFICIAL FOUND
test.exe: Test.GenSig.MSB_02of90_SHA1_FIXED_dottext.UNOFFICIAL FOUND
test.exe: Test.GenSig.MSB_03of90_SHA256_FIXED_dottext.UNOFFICIAL FOUND
test.exe: Test.GenSig.MSB_04of90_MD5_STAR_dottext.UNOFFICIAL FOUND
test.exe: Test.GenSig.MSB_05of90_SHA1_STAR_dottext.UNOFFICIAL FOUND
test.exe: Test.GenSig.MSB_06of90_SHA256_STAR_dottext.UNOFFICIAL FOUND
test.exe: Test.GenSig.NDB_01of08_legalcopyright.UNOFFICIAL FOUND
test.exe: Test.GenSig.NDB_02of08_internalname.UNOFFICIAL FOUND
test.exe: Test.GenSig.NDB_03of08_fileversion.UNOFFICIAL FOUND
test.exe: Test.GenSig.NDB_04of08_companyname.UNOFFICIAL FOUND
test.exe: Test.GenSig.NDB_05of08_productname.UNOFFICIAL FOUND
test.exe: Test.GenSig.NDB_06of08_productversion.UNOFFICIAL FOUND
test.exe: Test.GenSig.NDB_07of08_filedescription.UNOFFICIAL FOUND
test.exe: Test.GenSig.NDB_08of08_originalfilename.UNOFFICIAL FOUND
test.exe: Test.Sig.LDB_01of16_PE_1.UNOFFICIAL FOUND
test.exe: Test.Sig.LDB_02of16_PE_2.UNOFFICIAL FOUND
test.exe: Test.Sig.LDB_03of16_ANY_1.UNOFFICIAL FOUND
test.exe: Test.Sig.LDB_04of16_ANY_2.UNOFFICIAL FOUND
test.exe: Test.Sig.LDB_05of16_PE_EP_1.UNOFFICIAL FOUND
test.exe: Test.Sig.LDB_06of16_PE_EP_2.UNOFFICIAL FOUND
test.exe: Test.Sig.LDB_07of16_PE_SE1_1.UNOFFICIAL FOUND
test.exe: Test.Sig.LDB_09of16_PE_S1_1.UNOFFICIAL FOUND
test.exe: Test.Sig.LDB_10of16_PE_S1_2.UNOFFICIAL FOUND
test.exe: Test.Sig.LDB_11of16_PE_PCRE_1.UNOFFICIAL FOUND
test.exe: Test.Sig.LDB_12of16_PE_PCRE_2.UNOFFICIAL FOUND
test.exe: Test.Sig.LDB_13of16_ANY_PCRE_1.UNOFFICIAL FOUND
test.exe: Test.Sig.LDB_14of16_ANY_PCRE_2.UNOFFICIAL FOUND
test.exe: Test.Sig.LDB_15of16_PE_ICON_1.UNOFFICIAL FOUND
test.exe: Test.Sig.LDB_16of16_PE_ICON_2.UNOFFICIAL FOUND
test.exe: Test.Sig.NDB_01of10_PE_1.UNOFFICIAL FOUND
test.exe: Test.Sig.NDB_02of10_PE_2.UNOFFICIAL FOUND
test.exe: Test.Sig.NDB_03of10_ANY_1.UNOFFICIAL FOUND
test.exe: Test.Sig.NDB_04of10_ANY_2.UNOFFICIAL FOUND
test.exe: Test.Sig.NDB_05of10_PE_EP_1.UNOFFICIAL FOUND
test.exe: Test.Sig.NDB_06of10_PE_EP_2.UNOFFICIAL FOUND
test.exe: Test.Sig.NDB_07of10_PE_SE2_1.UNOFFICIAL FOUND
test.exe: Test.Sig.NDB_09of10_PE_S1_1.UNOFFICIAL FOUND
test.exe: Test.Sig.NDB_10of10_PE_S1_2.UNOFFICIAL FOUND
test.exe: YARA.Test_Sig_YARA_1of1_strings.UNOFFICIAL FOUND

Steps to generate the .ico file:

head -c 245760 /dev/urandom | convert -depth 8 -size 320x256 RGB:- test.png
convert -background transparent test.png -define icon:auto-resize=16,32,48,64,256 test.ico