Managed XDR

vcvaiwdtag.exe (DNS Sinkhole) — malware analysis report

File info

Filename
vcvaiwdtag.exe
File type
PE32 executable (GUI) Intel 80386, for MS Windows
File size
604 KB
First seen
Last seen

Environment

win7/x86 en

Hashes

SHA1
cb43c5792e51d8e87c899e3754a770d7e85965b4
SHA256
f7b2e4f3ee7b2dd293ef2b59f59fa9298a1889af90442dccdf53a60e5f8740b5
MD5
0fde80db91123efd7dce2665346fc41f

Malwares

  • DNS Sinkhole

Signatures

Initial Access

T1091 spreading_autoruninf: Creates an autorun.inf file

Persistence

T1547.001 persistence_autorun: Makes itself run automatically on Windows startup
T1547.004 persistence_autorun: Makes itself run automatically on Windows startup

Privilege Escalation

T1547.001 persistence_autorun: Makes itself run automatically on Windows startup
T1547.004 persistence_autorun: Makes itself run automatically on Windows startup
T1134 sets_privilegies_via_adjusttokenprivileges: Sets process privilege via AdjustTokenPrivileges
T1134 opens_thread_token: Opens the access token associated with a thread
T1134 opens_process_token: Opens the access token associated with a process

Defense Evasion

T1112 locker_hidden_showall: Makes it impossible to enable the display of hidden files and folders through "Folder options"
T1564.001 stealth_file: Creates hidden or system files
T1562 modify_uac_prompt: Attempts to modify UAC pop-up window behavior
T1562 disables_uac: Disable UAC
T1497.002 detects_mousemove: Checks if the mouse is moving
T1112 locker_regedit: Disables Windows Registry Editor
T1497.003 antisandbox_sleep: The process attempted to slow down analysis
T1027.002 packer_entropy: Probably contains compressed or encrypted data
T1134 sets_privilegies_via_adjusttokenprivileges: Sets process privilege via AdjustTokenPrivileges
T1134 opens_thread_token: Opens the access token associated with a thread
T1134 opens_process_token: Opens the access token associated with a process
T1497.001 antivm_queries_computername: Retrieves the computer name

Credential Access

T1003.001 dumps_lsass: Dumps lsass.exe process (probably, to extract credentials)
T1056.001 infostealer_keylogger: Keylogger (intercepts keystrokes)

Discovery

T1518.001 antiav_detectservice: Attempts to detect installed antiviruses by a certain service
T1497.002 detects_mousemove: Checks if the mouse is moving
T1497.003 antisandbox_sleep: The process attempted to slow down analysis
T1057 process_interest: Enumerates processes
T1082 reads_csrss: Attempts to read csrss.exe memory
T1497.001 antivm_queries_computername: Retrieves the computer name

Lateral Movement

T1091 spreading_autoruninf: Creates an autorun.inf file

Collection

T1056.001 infostealer_keylogger: Keylogger (intercepts keystrokes)

Command and Control

T1568.002 dga_domains: Connects to DGA domains
T1071.001 network_http: Performs HTTP requests

Impact

T1489 change_service_config: Stops services via ChangeServiceConfig
T1489 service_control_stop: Stops services via ControlService

Other

yara_rules: Static rules
suricata_alert: Malicious traffic detected
creates_exe: Creates executable files in the file system
prevents_safeboot: Prevents booting in Safe Mode
creates_in_windows: Creates files in the Windows directory
copies_self: Creates a copy of itself
ip_domains: Identifies an IP address using external resources
network_bind: Starts servers listening at 0.0.0.0:27982
dns_without_resolve: DNS query without a response
dead_host: Connects to IP addresses that do not respond to requests
executes_dropped_exe: Executes dropped exe files
unexpected_exception: Unexpected exception
no_graphical_activity: No graphic activity
break_limit_exceeded: Warning: function calls limit has been exceeded
get_policy_info: Retrieves information about a Policy object
suspicious_network_port: Performs TCP or UDP request to non-standard port

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