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Windows
Analysis Report
http://wcdownloadercdn.lavasoft.com/8.9.0.1091/WcInstaller.exe
Overview
General Information
Detection
Score: | 52 |
Range: | 0 - 100 |
Whitelisted: | false |
Confidence: | 100% |
Signatures
Multi AV Scanner detection for dropped file
Yara detected Generic Downloader
Adds / modifies Windows certificates
Allocates memory with a write watch (potentially for evading sandboxes)
Contains functionality to call native functions
Contains functionality to dynamically determine API calls
Contains long sleeps (>= 3 min)
Creates a process in suspended mode (likely to inject code)
Creates files inside the system directory
Detected potential crypto function
Downloads executable code via HTTP
Drops PE files
Enables debug privileges
Found dropped PE file which has not been started or loaded
Found potential string decryption / allocating functions
HTTP GET or POST without a user agent
May sleep (evasive loops) to hinder dynamic analysis
Monitors certain registry keys / values for changes (often done to protect autostart functionality)
PE file contains an invalid checksum
PE file contains sections with non-standard names
Queries the volume information (name, serial number etc) of a device
Sample execution stops while process was sleeping (likely an evasion)
Sigma detected: Usage Of Web Request Commands And Cmdlets
Stores large binary data to the registry
Suricata IDS alerts with low severity for network traffic
Uses code obfuscation techniques (call, push, ret)
Very long cmdline option found, this is very uncommon (may be encrypted or packed)
Classification
- System is w10x64
- cmd.exe (PID: 3048 cmdline:
C:\Windows \system32\ cmd.exe /c wget -t 2 -v -T 60 -P "C:\Use rs\user\De sktop\down load" --no -check-cer tificate - -content-d isposition --user-ag ent="Mozil la/5.0 (Wi ndows NT 6 .1; WOW64; Trident/7 .0; AS; rv :11.0) lik e Gecko" " http://wcd ownloaderc dn.lavasof t.com/8.9. 0.1091/WcI nstaller.e xe" > cmdl ine.out 2> &1 MD5: D0FCE3AFA6AA1D58CE9FA336CC2B675B) - conhost.exe (PID: 6796 cmdline:
C:\Windows \system32\ conhost.ex e 0xffffff ff -ForceV 1 MD5: 0D698AF330FD17BEE3BF90011D49251D) - wget.exe (PID: 1112 cmdline:
wget -t 2 -v -T 60 - P "C:\User s\user\Des ktop\downl oad" --no- check-cert ificate -- content-di sposition --user-age nt="Mozill a/5.0 (Win dows NT 6. 1; WOW64; Trident/7. 0; AS; rv: 11.0) like Gecko" "h ttp://wcdo wnloadercd n.lavasoft .com/8.9.0 .1091/WcIn staller.ex e" MD5: 3DADB6E2ECE9C4B3E1E322E617658B60)
- WcInstaller.exe (PID: 6428 cmdline:
"C:\Users\ user\Deskt op\downloa d\WcInstal ler.exe" MD5: 867A91A0D1D0A8C6FE8431BD1C3764C3) - WebCompanionInstaller.exe (PID: 3856 cmdline:
.\WebCompa nionInstal ler.exe MD5: 1DD482A55C56D87111463B92DA716FC4) - WcInstaller.exe (PID: 4032 cmdline:
"C:\Users\ user\AppDa ta\Local\T emp\wctmp_ 700474969\ WcInstalle r.exe" --n anouniquei d=17310790 18259 MD5: 3662CA255599DB5161CDE52E1DE102A7) - WebCompanionInstaller.exe (PID: 4856 cmdline:
.\WebCompa nionInstal ler.exe -- prod --nan ouniqueid= 1731079018 259 MD5: FC6914EC6BFCC36059143A72E2073C19)
- cleanup
⊘No configs have been found
Source | Rule | Description | Author | Strings |
---|---|---|---|---|
JoeSecurity_GenericDownloader_1 | Yara detected Generic Downloader | Joe Security | ||
JoeSecurity_GenericDownloader_1 | Yara detected Generic Downloader | Joe Security |
Source | Rule | Description | Author | Strings |
---|---|---|---|---|
JoeSecurity_GenericDownloader_1 | Yara detected Generic Downloader | Joe Security | ||
JoeSecurity_GenericDownloader_1 | Yara detected Generic Downloader | Joe Security | ||
JoeSecurity_GenericDownloader_1 | Yara detected Generic Downloader | Joe Security | ||
JoeSecurity_GenericDownloader_1 | Yara detected Generic Downloader | Joe Security | ||
JoeSecurity_GenericDownloader_1 | Yara detected Generic Downloader | Joe Security | ||
Click to see the 1 entries |
Source: | Author: James Pemberton / @4A616D6573, Endgame, JHasenbusch, oscd.community, Austin Songer @austinsonger: |
Timestamp | SID | Severity | Classtype | Source IP | Source Port | Destination IP | Destination Port | Protocol |
---|---|---|---|---|---|---|---|---|
2024-11-08T16:17:12.836991+0100 | 2022930 | 1 | A Network Trojan was detected | 172.202.163.200 | 443 | 192.168.2.6 | 49770 | TCP |
2024-11-08T16:17:50.603992+0100 | 2022930 | 1 | A Network Trojan was detected | 172.202.163.200 | 443 | 192.168.2.6 | 49975 | TCP |
Click to jump to signature section
Show All Signature Results
AV Detection |
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Source: | ReversingLabs: | ||
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Source: | Code function: | 4_2_00405434 |
Networking |
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Source: | HTTP traffic detected: |