ClamAV是一个可用于Linux平台上的开源杀毒引擎，可检测木马、病毒、恶意软件和其他恶意的威胁。
官网：http://www.clamav.net/
一、CentOS环境安装
# yum install -y epel-release
# yum install -y clamav
二、病毒库更新检查：freshclam
# freshclam
ClamAV update process started at Fri Sep ::
main.cld is up to date (version: , sigs: , f-level: , builder: sigmgr)
Downloading daily-.cdiff [%]
daily.cld updated (version: , sigs: , f-level: , builder: neo)
bytecode.cld is up to date (version: , sigs: , f-level: , builder: neo)
Database updated ( signatures) from db.local.clamav.net (IP: 203.178.137.175)
三、帮助文档
# clamscan --help
Clam AntiVirus Scanner 0.99.
By The ClamAV Team: http://www.clamav.net/about.html#credits
(C) - Cisco Systems, Inc.
--help -h Print this help screen
--version -V Print version number
--verbose -v Be verbose
--archive-verbose -a Show filenames inside scanned archives
--debug Enable libclamav's debug messages
--quiet Only output error messages
--stdout Write to stdout instead of stderr
--no-summary Disable summary at end of scanning
--infected -i Only print infected files
--suppress-ok-results -o Skip printing OK files
--bell Sound bell on virus detection
--tempdir=DIRECTORY Create temporary files in DIRECTORY
--leave-temps[=yes/no(*)] Do not remove temporary files
--database=FILE/DIR -d FILE/DIR Load virus database from FILE or load
all supported db files from DIR
--official-db-only[=yes/no(*)] Only load official signatures
--log=FILE -l FILE Save scan report to FILE
--recursive[=yes/no(*)] -r Scan subdirectories recursively
--allmatch[=yes/no(*)] -z Continue scanning within file after finding a match
--cross-fs[=yes(*)/no] Scan files and directories on other filesystems
--follow-dir-symlinks[=/(*)/] Follow directory symlinks ( = never, = direct, = always)
--follow-file-symlinks[=/(*)/] Follow file symlinks ( = never, = direct, = always)
--file-list=FILE -f FILE Scan files from FILE
--remove[=yes/no(*)] Remove infected files. Be careful!
--move=DIRECTORY Move infected files into DIRECTORY
--copy=DIRECTORY Copy infected files into DIRECTORY
--exclude=REGEX Don't scan file names matching REGEX
--exclude-dir=REGEX Don't scan directories matching REGEX
--include=REGEX Only scan file names matching REGEX
--include-dir=REGEX Only scan directories matching REGEX
--bytecode[=yes(*)/no] Load bytecode from the database
--bytecode-unsigned[=yes/no(*)] Load unsigned bytecode
--bytecode-timeout=N Set bytecode timeout (in milliseconds)
--statistics[=none(*)/bytecode/pcre] Collect and print execution statistics
--detect-pua[=yes/no(*)] Detect Possibly Unwanted Applications
--exclude-pua=CAT Skip PUA sigs of category CAT
--include-pua=CAT Load PUA sigs of category CAT
--detect-structured[=yes/no(*)] Detect structured data (SSN, Credit Card)
--structured-ssn-format=X SSN format (=normal,=stripped,=both)
--structured-ssn-count=N Min SSN count to generate a detect
--structured-cc-count=N Min CC count to generate a detect
--scan-mail[=yes(*)/no] Scan mail files
--phishing-sigs[=yes(*)/no] Signature-based phishing detection
--phishing-scan-urls[=yes(*)/no] URL-based phishing detection
--heuristic-scan-precedence[=yes/no(*)] Stop scanning as soon as a heuristic match is found
--phishing-ssl[=yes/no(*)] Always block SSL mismatches in URLs (phishing module)
--phishing-cloak[=yes/no(*)] Always block cloaked URLs (phishing module)
--partition-intersection[=yes/no(*)] Detect partition intersections in raw disk images using heuristics.
--algorithmic-detection[=yes(*)/no] Algorithmic detection
--scan-pe[=yes(*)/no] Scan PE files
--scan-elf[=yes(*)/no] Scan ELF files
--scan-ole2[=yes(*)/no] Scan OLE2 containers
--scan-pdf[=yes(*)/no] Scan PDF files
--scan-swf[=yes(*)/no] Scan SWF files
--scan-html[=yes(*)/no] Scan HTML files
--scan-xmldocs[=yes(*)/no] Scan xml-based document files
--scan-hwp3[=yes(*)/no] Scan HWP3 files
--scan-archive[=yes(*)/no] Scan archive files (supported by libclamav)
--detect-broken[=yes/no(*)] Try to detect broken executable files
--block-encrypted[=yes/no(*)] Block encrypted archives
--block-macros[=yes/no(*)] Block OLE2 files with VBA macros
--nocerts Disable authenticode certificate chain verification in PE files
--dumpcerts Dump authenticode certificate chain in PE files
--max-filesize=#n Files larger than this will be skipped and assumed clean
--max-scansize=#n The maximum amount of data to scan for each container file (**)
--max-files=#n The maximum number of files to scan for each container file (**)
--max-recursion=#n Maximum archive recursion level for container file (**)
--max-dir-recursion=#n Maximum directory recursion level
--max-embeddedpe=#n Maximum size file to check for embedded PE
--max-htmlnormalize=#n Maximum size of HTML file to normalize
--max-htmlnotags=#n Maximum size of normalized HTML file to scan
--max-scriptnormalize=#n Maximum size of script file to normalize
--max-ziptypercg=#n Maximum size zip to type reanalyze
--max-partitions=#n Maximum number of partitions in disk image to be scanned
--max-iconspe=#n Maximum number of icons in PE file to be scanned
--max-rechwp3=#n Maximum recursive calls to HWP3 parsing function
--pcre-match-limit=#n Maximum calls to the PCRE match function.
--pcre-recmatch-limit=#n Maximum recursive calls to the PCRE match function.
--pcre-max-filesize=#n Maximum size file to perform PCRE subsig matching.
--enable-stats Enable statistical reporting of malware
--disable-pe-stats Disable submission of individual PE sections in stats submissions
--stats-timeout=#n Number of seconds to wait for waiting a response back from the stats server
--stats-host-id=UUID Set the Host ID used when submitting statistical info.
--disable-cache Disable caching and cache checks for hash sums of scanned files.
(*) Default scan settings
(**) Certain files (e.g. documents, archives, etc.) may in turn contain other
files inside. The above options ensure safe processing of this kind of data.
四、病毒扫描：clamscan（递归扫描+扫描路径输出）
# clamscan -r /root/ --stdout
/root/.cshrc: OK
/root/.abrt/applet_dirlist: Empty file
/root/ossec-hids-2.8..tar.gz: OK
/root/virusDemo/virus/s.zip: Win.*.HollandGirl-1 FOUND
/root/.gconfd/saved_state: OK
/root/rootkit.exe: Empty file
/root/clam_log_170922.txt: OK
/root/virusDemo/virus/l.zip: Win.*.Radyum-2 FOUND
/root/.imsettings.log: OK
/root/virusDemo/virus/n.zip: Win.*.Nympho-2 FOUND
/root/chkrootkit-0.52/ifpromisc.c: OK
/root/chkrootkit-0.52/chkrootkit.lsm: OK
/root/chkrootkit-0.52/COPYRIGHT: OK ... ----------- SCAN SUMMARY -----------
Known viruses:
Engine version: 0.99.
Scanned directories:
Scanned files:
Infected files: 23
Data scanned: 133.68 MB
Data read: 87.24 MB (ratio 1.53:)
Time: 38.355 sec ( m s)