Managed XDR

d6b7b27e13700aaa7f108b...afcc2d2227ca11bba9.exe (Ryuk) — malware analysis report

File info

Filename
d6b7b27e13700aaa7f108bf9e76473717a7a1665198e9aafcc2d2227ca11bba9.exe
File type
PE32 executable (GUI) Intel 80386, for MS Windows
File size
131 KB
First seen
Last seen

Environment

win7/x86 en

Hashes

SHA1
5a385b8b4b88b6eb93b771b7fbbe190789ef396a
SHA256
d6b7b27e13700aaa7f108bf9e76473717a7a1665198e9aafcc2d2227ca11bba9
MD5
2cc630e080bb8de5faf9f5ae87f43f8b

Malwares

  • Ryuk

Signatures

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

T1497 antidbg_query_process: Checks if the process is being debugged (ProcessDebugPort)
T1222 icacls: May obtain or change Discretionary access control lists (DACLs)
T1497 evasion_diskenum: Sandbox evasion using enumeration of partitions
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

T1497 antidbg_query_process: Checks if the process is being debugged (ProcessDebugPort)
T1497 evasion_diskenum: Sandbox evasion using enumeration of partitions

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)
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
no_graphical_activity: No graphic activity
writes_data: Writes big amount of data to disk

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