Managed XDR

c-windows-ir3wrvg.exe — malware analysis report

File info

Filename
c-windows-ir3wrvg.exe
File type
PE32 executable (GUI) Intel 80386 (stripped to external PDB), for MS Windows, UPX compressed
File size
2 MB
First seen
Last seen

Environment

w10/x64 en

Hashes

SHA1
dc57eb65871a8376041683cfced6a5175ca4e028
SHA256
b36563dc86b0cc23f12cbceb1a958f345cde561602a20ce053c49d8062c82902
MD5
a712fcf9ae14d79179fb01d0480878d5

Signatures

Execution

T1047 has_wmi: Executes one or several WMI requests

Privilege Escalation

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

T1027.002 unnamed_memory_regions: Code was executed in unnamed regions
T1497.003 antisandbox_idletime: Detects Windows Idle Time to determine the uptime
T1027.002 packer_upx: The executable file is compressed using UPX
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
T1027.002 packer_entropy: Probably contains compressed or encrypted data
T1480 system_default_lang_id_present: Checks the system language
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

Credential Access

T1552 infostealer_browser: Retrieves personal information from local Internet browsers
T1503 infostealer_browser: Retrieves personal information from local Internet browsers
T1552 infostealer_im: Collects information about installed messengers
T1552.001 infostealer_bitcoin: Attempts to obtain access to Bitcoin/ALTCoin wallets
T1552 infostealer_ftp: Collects data from local FTP clients
T1555.003 cookie_files: Accesses cookie files
T1555.004 windows_credential_manager: Acquire credentials from the Windows Credential Manager
T1552 cookie_files: Accesses cookie files
T1003.001 dumps_lsass: Dumps lsass.exe process (probably, to extract credentials)

Discovery

T1497.003 antisandbox_idletime: Detects Windows Idle Time to determine the uptime
T1057 has_wmi: Executes one or several WMI requests
T1057 process_interest: Enumerates processes
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
T1082 reads_csrss: Attempts to read csrss.exe memory

Command and Control

T1071.001 winhttp_https: Performs HTTP/HTTPS requests using WinHttp

Other

network_bind: Starts servers listening at None
dead_host: Connects to IP addresses that do not respond to requests
create_rpc_bindings: Creates RPC connection
suspicious_network_port: Performs TCP or UDP request to non-standard port
test_check_service: Starts services
open_winlogon_process: Trying to open winlogon process
yara_rules: Static rules