Managed XDR

c31fn66.exe — malware analysis report

File info

Filename
c31fn66.exe
File type
PE32 executable (GUI) Intel 80386, for MS Windows
File size
239 KB
First seen
Last seen

Environment

win7/x86 en

Hashes

SHA1
e4c6f4eb9f4bb100c52a76b90d8a2b5a5f19d107
SHA256
afbc2f47e5aa08abf1966e953793727f3c66584572096f75db4ea3195f50423f
MD5
c20dd70aefd0f09ba68e13ba13075847

Signatures

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

T1562.001 disables_security: Disables Windows Security options
T1112 wu_server: Sets or changes an update server used by Windows Update
T1027.002 unnamed_memory_regions: Code was executed in unnamed regions
T1562.001 disables_windowsupdate: Disables Windows Auto Updates
T1027.002 packer_entropy: Probably contains compressed or encrypted data
T1497.003 antisandbox_sleep: The process attempted to slow down analysis
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

Discovery

T1518.001 antiav_detectservice: Attempts to detect installed antiviruses by a certain service
T1497.003 antisandbox_sleep: The process attempted to slow down analysis

Impact

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

Other

yara_rules: Static rules
no_graphical_activity: No graphic activity
origin_langid: Unconventional language of the executable file
get_policy_info: Retrieves information about a Policy object
test_check_service: Starts services
open_winlogon_process: Trying to open winlogon process