Managed XDR

putty.lnk — malware analysis report

File info

Filename
putty.lnk
File type
MS Windows shortcut, Item id list present, Points to a file or directory, Has command line arguments, Icon number=0, Archive, ctime=Sat May 8 08:14:00 2021, mtime=Sat May 8 08:14:00 2021, atime=Sat May 8 08:14:00 2021, length=250880, window=hide
File size
1.9 KB
First seen
Last seen

Environment

w10/x64 en

Hashes

SHA1
094635b6c5214c39b8cf03d15b731dc36e260212
SHA256
b8c6666c212664eb4f4730ba6db46a48566880cf6b0430e5c6651cb412d23216
MD5
311bc3ce72348bb95adc356c2984475f

Signatures

Execution

T1204 suspicious_lnk: LNK file with suspicious content
T1072 detect_putty: Traces typical for Putty are detected in the system
T1059.001 url_cmdline: Cmdline of process contains URL
T1059.003 suspicious_cmd: Executes cmd.exe with a suspicious command line
T1059.003 url_cmdline: Cmdline of process contains URL
T1047 antivm_wmi: Uses WMI to detect virtual environment
T1047 has_wmi: Executes one or several WMI requests

Defense Evasion

T1218 suspicious_cmdline: Executes a suspicious command
T1497.001 antivm_wmi: Uses WMI to detect virtual environment
T1027 suspicious_cmd: Executes cmd.exe with a suspicious command line
T1497 evasion_printers: Attempts to detect Sandbox by exploring existing printers
T1497.001 antivm_generic_productname: Checks system product name in registry, possibly for anti-virtualization
T1497.002 antivm_usbstor: Reads information about usbdevices from regkey

Credential Access

T1555.004 windows_credential_manager: Acquire credentials from the Windows Credential Manager

Discovery

T1497.001 antivm_wmi: Uses WMI to detect virtual environment
T1057 has_wmi: Executes one or several WMI requests
T1082 has_wmi: Executes one or several WMI requests
T1497 evasion_printers: Attempts to detect Sandbox by exploring existing printers
T1497.001 antivm_generic_productname: Checks system product name in registry, possibly for anti-virtualization
T1497.002 antivm_usbstor: Reads information about usbdevices from regkey

Lateral Movement

T1072 detect_putty: Traces typical for Putty are detected in the system

Command and Control

T1071.001 network_http: Performs HTTP requests
T1105 cmdline_curl: Uses curl utility for network data transferring
T1071.001 winhttp_https: Performs HTTP/HTTPS requests using WinHttp

Other

network_bind: Starts servers listening at None
suspicious_process_network: Unusual process network activity detected
creates_suspended_process: Creates suspended process
suspicious_network_port: Performs TCP or UDP request to non-standard port
test_check_service: Starts services
yara_rules: Static rules