Managed XDR

c-windows-f8tswsw.exe (Agent Tesla) — malware analysis report

File info

Filename
c-windows-f8tswsw.exe
File type
news or mail, UTF-8 Unicode text, with very long lines, with CRLF, LF line terminators
File size
2.5 MB
First seen
Last seen

Environment

w10/x64 en

Hashes

SHA1
b7504cdc2f706521b350104b2c6b1298f64ea003
SHA256
1fb47e013178a1a05525dd8dd1e91741e3f605417faad06d015065976b4734df
MD5
8da73c395f1011a37fbd2b292af54392

Malwares

  • Agent Tesla

Signatures

Initial Access

T1192 html_urls: HTML-document downloads a file

Privilege Escalation

T1134 opens_thread_token: Opens the access token associated with a thread
T1134 opens_process_token: Opens the access token associated with a process
T1055 injection_failed: The attempt to inject into a process has failed

Defense Evasion

T1027.002 packer_entropy: Probably contains compressed or encrypted data
T1027.002 pe_features: Executable file has PE anomalies (may be false positive)
T1497 evasion_printers: Attempts to detect Sandbox by exploring existing printers
T1497.001 antivm_queries_computername: Retrieves the computer name
T1134 opens_thread_token: Opens the access token associated with a thread
T1134 opens_process_token: Opens the access token associated with a process
T1055 injection_failed: The attempt to inject into a process has failed

Credential Access

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

Discovery

T1497 evasion_printers: Attempts to detect Sandbox by exploring existing printers
T1497.001 antivm_queries_computername: Retrieves the computer name

Command and Control

T1102.003 references_github: Contains links to cloud services of Github (potentially for malicious payload delivery)
T1071.001 winhttp_https: Performs HTTP/HTTPS requests using WinHttp

Other

static_pe_anomaly: The PE file structure contains anomalies
network_bind: Starts servers listening at None
dotnet_obfuscated: Dotnet program is potentially obfuscated
process_crashed: One of the processes has failed
unexpected_exception: Unexpected exception
dotnet_suspicious_resources_names: Dotnet program has suspicious resources names
has_pdb: This executable file has a PDB path
dotnet_import_unmanaged_code: Dotnet program statically imports unmanaged functions/modules
suspicious_network_port: Performs TCP or UDP request to non-standard port
test_check_service: Starts services
pe_overlay: PE file contains overlay
encoded_c2_in_pe: Possibly an encoded URL or IP address in PE file
yara_rules: Static rules
dotnet_downloader_possible_network_problem: Dotnet program possibly has network problem

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