Managed XDR

cb869ee601df5caac324fe...63f54d204b-dropped.bin (Tofsee) — malware analysis report

File info

Filename
cb869ee601df5caac324feeef1424991e1fe697fe36793297fe45263f54d204b-dropped.bin
File type
PE32 executable (GUI) Intel 80386, for MS Windows
File size
14.6 MB
First seen
Last seen

Environment

w10/x86 en

Hashes

SHA1
6986127206dd59667591c22108e16557ef16a591
SHA256
cb869ee601df5caac324feeef1424991e1fe697fe36793297fe45263f54d204b
MD5
fee767bcd1cc7b2f367ae75a847ad310

Malwares

  • Tofsee

Signatures

Execution

T1569.002 persistence_service: Starts newly created service

Persistence

T1547.001 persistence_autorun: Makes itself run automatically on Windows startup
T1543.003 creates_service: Creates a service, that will start automatically

Privilege Escalation

T1547.001 persistence_autorun: Makes itself run automatically on Windows startup
T1055.002 inject_write_pe: Writes PE file to another process's memory
T1543.003 creates_service: Creates a service, that will start automatically
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_contains_pe: One or several unnamed memory regions are PE files
T1055.002 inject_write_pe: Writes PE file to another process's memory
T1027.002 unnamed_memory_regions: Code was executed in unnamed regions
T1562.001 disables_security: Disables Windows Security options
T1112 creates_largekey: Saves very large data in the registry, can be used to save the configuration or body of the malware
T1096 persistence_ads: Creates Alternate Data Stream (ADS)
T1562.004 firewall_add_rule: Modifies Firewall rules
T1497.001 antivm_disk_size: Checks the amount of free disk space
T1497.003 antisandbox_sleep: The process attempted to slow down analysis
T1027.002 packer_entropy: Probably contains compressed or encrypted data
T1497.001 antivm_network_adapters: Checks NIC addresses
T1027.002 pe_features: Executable file has PE anomalies (may be false positive)
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
T1070 stealth_window: A process created a hidden window

Discovery

T1497.001 antivm_disk_size: Checks the amount of free disk space
T1497.003 antisandbox_sleep: The process attempted to slow down analysis
T1082 uses_windows_utilities: Uses Windows utilities for basic Windows functionality
T1497.001 antivm_network_adapters: Checks NIC addresses
T1497.001 antivm_queries_computername: Retrieves the computer name
T1016 get_hostname: Attempts to get hostname

Command and Control

T1071.001 network_http: Performs HTTP requests

Impact

T1489 net_stop: Stops services through the use of net stop

Other

yara_rules: Static rules
suricata_alert: Malicious traffic detected
creates_exe: Creates executable files in the file system
executes_dropped_exe: Executes dropped exe files
creates_in_windows: Creates files in the Windows directory
network_bind: Starts servers listening at 0.0.0.0:2413
dns_without_resolve: DNS query without a response
suspicious_process: Spawns a suspicious process
network_ftp: Performs FTP requests
no_graphical_activity: No graphic activity
create_rpc_bindings: Creates RPC connection
creates_suspended_process: Creates suspended process
origin_langid: Unconventional language of the executable file
test_check_service: Starts services
checktokenmembership: Checks user token with CheckTokenMembership call

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