Managed XDR

_task — malware analysis report

File info

Filename
_task
File type
SMTP mail, ASCII text, with very long lines, with CRLF line terminators
File size
7 MB
First seen
Last seen

Environment

w10/x64 en

Hashes

SHA1
3821bc4687275ef117e0baad64c9cdf7d753c500
SHA256
48ef77af9321c25ab54a8fc48dac5047b51cb88c1c43851b9cda19b5089dcd1f
MD5
767dde18f48a5a614b8e76cb1d184756

Signatures

Execution

T1053.005 creates_tasks: Creates a delayed task using Task Scheduler
T1059.001 suspicious_powershell: Creates suspicious powershell process
T1059.001 suspicious_process: Spawns a suspicious process
T1047 has_wmi: Executes one or several WMI requests
T1059.001 url_cmdline: Cmdline of process contains URL
T1059.003 url_cmdline: Cmdline of process contains URL

Persistence

T1053.005 creates_tasks: Creates a delayed task using Task Scheduler
T1574 dropper_dll: Creates DLL, which is then loaded into the process

Privilege Escalation

T1053.005 creates_tasks: Creates a delayed task using Task Scheduler
T1134 opens_thread_token: Opens the access token associated with a thread
T1134 opens_process_token: Opens the access token associated with a process
T1574 dropper_dll: Creates DLL, which is then loaded into the process

Defense Evasion

T1036.001 invalid_authenticode: Digital signature of the executable file has failed the verification
T1564.001 hides_original_file: Makes original executable file hidden
T1564.001 stealth_file: Creates hidden or system files
T1497 antidbg_windows: Checks for open windows typical for debuggers and forensic tools
T1497.001 antisandbox_sunbelt: Attempts to detect SunBelt Sandbox
T1497.001 antivm_sandboxie: Attempts to detect Sandboxie
T1027.002 unnamed_memory_regions_contains_pe: One or several unnamed memory regions are PE files
T1027.002 unnamed_memory_regions: Code was executed in unnamed regions
T1497 antidbg_query_process: Checks if the process is being debugged (ProcessDebugPort)
T1497.001 antivm_disk_size: Checks the amount of free disk space
T1497.003 antisandbox_idletime: Detects Windows Idle Time to determine the uptime
T1497.003 antisandbox_sleep: The process attempted to slow down analysis
T1134 opens_thread_token: Opens the access token associated with a thread
T1134 opens_process_token: Opens the access token associated with a process
T1574 dropper_dll: Creates DLL, which is then loaded into the process
T1497.001 antivm_queries_computername: Retrieves the computer name
T1027.002 packer_entropy: Probably contains compressed or encrypted data
T1070 stealth_window: A process created a hidden window

Credential Access

T1056.001 infostealer_keylogger: Keylogger (intercepts keystrokes)
T1503 infostealer_browser: Retrieves personal information from local Internet browsers
T1552 infostealer_browser: Retrieves personal information from local Internet browsers
T1555.003 cookie_files: Accesses cookie files
T1552 cookie_files: Accesses cookie files

Discovery

T1518.001 antiav_avast_libs: Attempts to detect Avast Antivirus by a certain library
T1033 recon_beacon: The process has sent information about the computer over the network
T1497 antidbg_windows: Checks for open windows typical for debuggers and forensic tools
T1497.001 antisandbox_sunbelt: Attempts to detect SunBelt Sandbox
T1497.001 antivm_sandboxie: Attempts to detect Sandboxie
T1057 process_interest: Enumerates processes
T1497 antidbg_query_process: Checks if the process is being debugged (ProcessDebugPort)
T1497.001 antivm_disk_size: Checks the amount of free disk space
T1497.003 antisandbox_idletime: Detects Windows Idle Time to determine the uptime
T1497.003 antisandbox_sleep: The process attempted to slow down analysis
T1082 uses_windows_utilities: Uses Windows utilities for basic Windows functionality
T1518 locates_browser: Attempts to identify where browsers are installed
T1016 get_hostname: Attempts to get hostname
T1497.001 antivm_queries_computername: Retrieves the computer name
T1082 fingerprint_to_file: Collects data about system and user and writes it to a text file

Collection

T1056.001 infostealer_keylogger: Keylogger (intercepts keystrokes)

Command and Control

T1071.001 recon_beacon: The process has sent information about the computer over the network
T1071.001 wininet_https: Performs HTTP/HTTPS requests using WinInet

Other

creates_many_processes: Spawns a lot of processes (over 70)
multiple_useragents: Uses more than one unique User-Agent
creates_exe: Creates executable files in the file system
creates_doc: Creates (office) documents in the file system
network_powershell: Powershell process network connection detected
create_rpc_bindings: Creates RPC connection
creates_suspended_process: Creates suspended process
break_limit_exceeded: Warning: function calls limit has been exceeded
creates_in_programdata: Creates files in the ProgramData directory
checktokenmembership: Checks user token with CheckTokenMembership call
pe_overlay: PE file contains overlay
executes_dropped_exe: Executes dropped exe files
suricata_alert: Malicious traffic detected
yara_rules: Static rules
Managed XDR