Managed XDR

vtdl_1743127421_ozzermuf (Ramnit) — malware analysis report

File info

Filename
vtdl_1743127421_ozzermuf
File type
Zip archive data, at least v2.0 to extract
File size
2.4 MB
First seen
Last seen

Environment

win7/x86 en

Hashes

SHA1
d15dc9ba6b0b27c2453ae528ec5f21ae1872dea8
SHA256
2173f2334f76c441b79c485d8859a7435634635cdddfbf04d09206729ed3b8f7
MD5
b04fa2a99e3e390cb17e199cb1529e66

Malwares

  • Ramnit

Signatures

Execution

T1059.003 executes_dropped_cmd: Executes dropped batch files
T1047 has_wmi: Executes one or several WMI requests
T1106 susp_callbacks: Suspicious usage of some WinAPI with callbacks

Persistence

T1547.001 persistence_autorun: Makes itself run automatically on Windows startup

Privilege Escalation

T1547.001 persistence_autorun: Makes itself run automatically on Windows startup
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 packer_entropy: Probably contains compressed or encrypted data
T1027.002 pe_features: Executable file has PE anomalies (may be false positive)
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
T1070.004 self_removal_command: Executes command to delete itself

Credential Access

T1552 infostealer_browser: Retrieves personal information from local Internet browsers
T1503 infostealer_browser: Retrieves personal information from local Internet browsers
T1552 infostealer_mail: Collects personal data from local email clients
T1552 cookie_files: Accesses cookie files
T1555.003 cookie_files: Accesses cookie files
T1555.004 windows_credential_manager: Acquire credentials from the Windows Credential Manager

Discovery

T1083 crawls_directories: Opens a huge number of directories all over disk C: (possibly, searches for sensitive data)
T1082 uses_windows_utilities: Uses Windows utilities for basic Windows functionality
T1518 locates_browser: Attempts to identify where browsers are installed
T1082 reads_csrss: Attempts to read csrss.exe memory

Collection

T1114 infostealer_mail: Collects personal data from local email clients

Impact

T1485 deletes_files: Removes 500 or more files from C: drive

Other

yara_rules: Static rules
office_embedded: Office document contains embedded executable file(s)
ramnit: Ramnit indicators detected (mutexes or files)
kills_explorer: Terminates explorer.exe process
creates_exe: Creates executable files in the file system
access_recyclebin: Manipulation with recyclebin detected
checktokenmembership: Checks user token with CheckTokenMembership call

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