Managed XDR

vtdl_0xgvmr2b (REvil, Sodinokibi) — malware analysis report

File info

Filename
vtdl_0xgvmr2b
File type
PE32 executable (DLL) (console) Intel 80386, for MS Windows, UPX compressed
File size
445.8 KB
First seen
Last seen

Environment

win7/x86 en

Hashes

SHA1
a9a599d3580848de7ce81c6164b7c4a2d4d84865
SHA256
0ab5fdecf7e1504329562488d420a31c3b339f62fb6bba1c9cd15ebe2398c399
MD5
afd16b6a1861dca025ac7b472d7d9bc1

Malwares

  • REvil
  • Sodinokibi

Signatures

Execution

T1047 has_wmi: Executes one or several WMI requests

Persistence

T1574.011 persistence_services: Modifies Services registry key
T1543.003 persistence_services: Modifies Services registry key
T1574 dropper_dll: Creates DLL, which is then loaded into the process

Privilege Escalation

T1574.011 persistence_services: Modifies Services registry key
T1543.003 persistence_services: Modifies Services registry key
T1134 sets_privilegies_via_rtladjustprivilege: Sets process privilege via RtlAdjustPrivilege
T1134 opens_thread_token: Opens the access token associated with a thread
T1134 opens_process_token: Opens the access token associated with a process
T1574 dropper_dll: Creates DLL, which is then loaded into the process

Defense Evasion

T1027.002 unnamed_memory_regions: Code was executed in unnamed regions
T1497.001 antivm_disk_size: Checks the amount of free disk space
T1497.003 antisandbox_sleep: The process attempted to slow down analysis
T1574.011 persistence_services: Modifies Services registry key
T1027.002 packer_upx: The executable file is compressed using UPX
T1497 evasion_diskenum: Sandbox evasion using enumeration of partitions
T1497.001 antivm_queries_computername: Retrieves the computer name
T1134 sets_privilegies_via_rtladjustprivilege: Sets process privilege via RtlAdjustPrivilege
T1134 opens_thread_token: Opens the access token associated with a thread
T1134 opens_process_token: Opens the access token associated with a process
T1574 dropper_dll: Creates DLL, which is then loaded into the process
T1027.002 packer_entropy: Probably contains compressed or encrypted data

Credential Access

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

Discovery

T1007 has_wmi: Executes one or several WMI requests
T1057 has_wmi: Executes one or several WMI requests
T1518.001 antiav_detectservice: Attempts to detect installed antiviruses by a certain service
T1497.001 antivm_disk_size: Checks the amount of free disk space
T1497.003 antisandbox_sleep: The process attempted to slow down analysis
T1057 process_interest: Enumerates processes
T1497 evasion_diskenum: Sandbox evasion using enumeration of partitions
T1497.001 antivm_queries_computername: Retrieves the computer name
T1082 reads_csrss: Attempts to read csrss.exe memory

Collection

T1113 screenshot_file: Possibly, makes a screenshot and saves it to a file
T1074.001 access_recyclebin: Manipulation with recyclebin detected

Command and Control

T1568.002 dga_domains: Connects to DGA domains
T1071.001 winhttp_https: Performs HTTP/HTTPS requests using WinHttp

Impact

T1486 modifies_files2: Cryptolocker indicators detected (100 or more files are modified)
T1486 modifies_files: Cryptolocker indicators detected (renamed 100 or more files)
T1489 stops_service: Stops Windows services
T1490 vssadmin_delete_shadows: Attempt to delete volume shadow copies
T1486 ransomware_files: Ransomware indicators detected REvil (creates keys and the instruction on how to unlock the files)
T1489 service_control_stop: Stops services via ControlService

Other

yara_rules: Static rules
ce_info: REvil note, REvil config Configuration Data found
revil: Ransomware REvil indicators detected
modifies_certs: Attempts to generate or modify system certificates
cryptolocker_wallpaper: Ransomware indicators detected (changes the desktop wallpaper file)
suspicious_process_network: Unusual process network activity detected
dns_without_resolve: DNS query without a response
dead_host: Connects to IP addresses that do not respond to requests
unexpected_exception: Unexpected exception
create_rpc_bindings: Creates RPC connection
break_limit_exceeded: Warning: function calls limit has been exceeded
message_box: Displays a message
error_drawtext: An error occured while executing the file
test_check_service: Starts services
checktokenmembership: Checks user token with CheckTokenMembership call
writes_data: Writes big amount of data to disk
pe_overlay: PE file contains overlay
suricata_alert: Malicious traffic detected

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