Managed XDR

vtdl_1741986180_y38o0ecq (Ryuk) — malware analysis report

File info

Filename
vtdl_1741986180_y38o0ecq
File type
PE32 executable (GUI) Intel 80386, for MS Windows
File size
117.5 KB
First seen
Last seen

Environment

win7/x86 en

Hashes

SHA1
d813ed6cdae54e67d46043d1f6188418bf1077fb
SHA256
d3fe47afb5036b3d51a07f33b9ab45ba98e5b124e903cb708ef26f79df95ce2e
MD5
a0d05d75bd78a2c51b074797b86434cb

Malwares

  • Ryuk

Signatures

Execution

T1047 has_wmi: Executes one or several WMI requests

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

Defense Evasion

T1222 icacls: May obtain or change Discretionary access control lists (DACLs)
T1134 opens_thread_token: Opens the access token associated with a thread
T1134 opens_process_token: Opens the access token associated with a process

Credential Access

T1555.003 cookie_files: Accesses cookie files
T1552 cookie_files: Accesses cookie files

Discovery

T1518 locates_browser: Attempts to identify where browsers are installed

Collection

T1074.001 access_recyclebin: Manipulation with recyclebin detected

Impact

T1486 modifies_files2: Cryptolocker indicators detected (500 or more files are modified)
T1486 modifies_files: Cryptolocker indicators detected (renamed 500 or more files)
T1490 vssadmin_delete_shadows: Attempt to delete volume shadow copies
T1486 ransomware_files: Ransomware indicators detected Ryuk (creates keys and the instruction on how to unlock the files)
T1486 ransomware_extensions: Ransomware(s) Ryuk indicators detected (specific extension is added to files)
T1486 ransomware_files_2: Ransomware(s) Ryuk indicators detected (creates keys and the instruction on how to unlock the files)
T1486 mass_data_encryption: Encrypts data using the same key (possible ransomware behaviour)

Other

yara_rules: Static rules
ryuk: Detected Ryuk ransomware
ransomware_shadowcopy: Removes volume shadow copies
ransomware_bcdedit: Runs bcdedit commands specific to ransomware
no_graphical_activity: No graphic activity
message_box: Displays a message
test_check_service: Starts services
writes_data: Writes big amount of data to disk

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