Managed XDR

vtdl_5y54zdfl (AvosLocker, Avos) — malware analysis report

File info

Filename
vtdl_5y54zdfl
File type
PE32 executable (console) Intel 80386, for MS Windows
File size
171 KB
First seen
Last seen

Environment

win7/x86 en

Hashes

SHA1
93a5f760a4a6b1e564c5dea03a2f3d41b94d9acc
SHA256
41fe4a7546141cafb8df61c51d86a24d05f5843e558d92a13323e3ecb0e40e00
MD5
a981a5846fb2e74ef91c67f935295481

Malwares

  • AvosLocker
  • Avos

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

T1027.002 packer_entropy: Probably contains compressed or encrypted data
T1027.002 pe_features: Executable file has PE anomalies (may be false positive)
T1497.001 antivm_queries_computername: Retrieves the computer name
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
T1555.003 cookie_files: Accesses cookie files
T1552 cookie_files: Accesses cookie files

Discovery

T1083 crawls_directories: Opens a huge number of directories all over disk C: (possibly, searches for sensitive data)
T1497.001 antivm_queries_computername: Retrieves the computer name

Collection

T1074.001 access_recyclebin: Manipulation with recyclebin detected

Impact

T1486 ransomware_extensions: Ransomware(s) AvosLocker indicators detected (specific extension is added to files)
T1486 modifies_files: Cryptolocker indicators detected (renamed 5 or more files)
T1486 ransomware_files_2: Ransomware(s) AvosLocker indicators detected (creates keys and the instruction on how to unlock the files)
T1486 ransomware_message: Ransomware indicators detected (possible ransom message creation)

Other

yara_rules: Static rules
ransomware_avos: Detected Avos ransomware
static_pe_duplicate_sections: The PE file structure contains anomalies: duplicate section names
create_rpc_bindings: Creates RPC connection
creates_in_programdata: Creates files in the ProgramData directory
avoslocker_mutex: Creates mutexes typical for AvosLocker
writes_data: Writes big amount of data to disk

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