Managed XDR

vtdl_1j87zays (AvosLocker, Avos) — malware analysis report

File info

Filename
vtdl_1j87zays
File type
PE32 executable (console) Intel 80386, for MS Windows, UPX compressed
File size
338.5 KB
First seen
Last seen

Environment

win7/x86 en

Hashes

SHA1
5d401a51aaaaa0e101921a738d17c0d7ea8ba0b0
SHA256
8f0c110f9ee8f6d2299b14bc90a0d8b9491a2297518db6859455e40f21126c81
MD5
c94e2f04fbb1f0808c2c5726a1865d25

Malwares

  • AvosLocker
  • Avos

Signatures

Execution

T1059.001 suspicious_powershell: Creates suspicious powershell process

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

T1027.002 unnamed_memory_regions: Code was executed in unnamed regions
T1027.002 packer_upx: The executable file is compressed using UPX
T1027.002 packer_entropy: Probably contains compressed or encrypted data
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

T1552.001 infostealer_bitcoin: Attempts to obtain access to Bitcoin/ALTCoin wallets

Discovery

T1083 crawls_directories: Opens a huge number of directories all over disk C: (possibly, searches for sensitive data)

Collection

T1074.001 access_recyclebin: Manipulation with recyclebin detected

Impact

T1486 modifies_files2: Cryptolocker indicators detected (100 or more files are modified)
T1486 modifies_files: Cryptolocker indicators detected (renamed 100 or more files)
T1486 ransomware_message: Ransomware indicators detected (possible ransom message creation)
T1486 ransomware_extensions: Ransomware(s) AvosLocker indicators detected (specific extension is added to files)
T1486 ransomware_files_2: Ransomware(s) AvosLocker indicators detected (creates keys and the instruction on how to unlock the files)

Other

yara_rules: Static rules
ransomware_avos: Detected Avos ransomware
cryptolocker_wallpaper: Ransomware indicators detected (changes the desktop wallpaper file)

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