Managed XDR

0cd0cc49ea4ff48c675368...2f33577f70bb6c0d5d.exe (BraZetsu) — malware analysis report

File info

Filename
0cd0cc49ea4ff48c675368f725e183608494f22fefa92d2f33577f70bb6c0d5d.exe
File type
PE32 executable (GUI) Intel 80386 (stripped to external PDB), for MS Windows
File size
34.9 MB
First seen
Last seen

Environment

w10/x64 en

Hashes

SHA1
20491e200ac6a524d5e33cdabc0ece1376dcde2f
SHA256
0cd0cc49ea4ff48c675368f725e183608494f22fefa92d2f33577f70bb6c0d5d
MD5
bd9a0e13836e45d9fd815c5d74df2bdf

Malwares

  • BraZetsu

Signatures

Execution

T1059.006 drops_python_dll: Drops python DLL

Persistence

T1574 dropper_dll: Creates DLL, which is then loaded into the process

Privilege Escalation

T1574 dropper_dll: Creates DLL, which is then loaded into the process
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

T1497.003 antisandbox_idletime: Detects Windows Idle Time to determine the uptime
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
T1497.002 antivm_usbstor: Reads information about usbdevices from regkey
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
T1480 system_default_lang_id_present: Checks the system language
T1574 dropper_dll: Creates DLL, which is then loaded into the process

Credential Access

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

Discovery

T1497.003 antisandbox_idletime: Detects Windows Idle Time to determine the uptime
T1497 evasion_printers: Attempts to detect Sandbox by exploring existing printers
T1497.002 antivm_usbstor: Reads information about usbdevices from regkey

Command and Control

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

Other

yara_rules: Static rules
code_share_services: Connects to text storage services (potentially for malicious payload delivery)
network_bind: Starts servers listening at None
creates_exe: Creates executable files in the file system
require_administrator: Requests administrator privileges
creates_suspended_process: Creates suspended process
suspicious_network_port: Performs TCP or UDP request to non-standard port
test_check_service: Starts services
checktokenmembership: Checks user token with CheckTokenMembership call
writes_data: Writes big amount of data to disk