Managed XDR

28-07-2020-dharma-rans...are-sample-zip.bin.zip (Dharma) — malware analysis report

File info

Filename
28-07-2020-dharma-ransomware-sample-zip.bin.zip
File type
Zip archive data, at least v2.0 to extract
File size
66.9 KB
First seen
Last seen

Environment

w10/x64 en

Hashes

SHA1
457485d91570d13286b44fcc2e605650d8f73db5
SHA256
691d1ab182a419eee8bd070ae22da4a9c507e47311a30001b4cbaf154efc8e61
MD5
1fd8cc6aa38f720877d1d51c826c5786

Malwares

  • Dharma

Signatures

Execution

T1059.003 suspicious_cmd_process: Cmd.exe without commandline launches a new process

Persistence

T1547.001 persistence_autorun: Makes itself run automatically on Windows startup

Privilege Escalation

T1547.001 persistence_autorun: Makes itself run automatically on Windows startup
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

T1564.001 stealth_file: Creates hidden or system files
T1070 stealth_webhistory: Clears browsing history
T1497.003 antisandbox_sleep: The process attempted to slow down analysis
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
T1497 evasion_printers: Attempts to detect Sandbox by exploring existing printers
T1497.001 antivm_queries_computername: Retrieves the computer name

Credential Access

T1503 infostealer_browser: Retrieves personal information from local Internet browsers
T1552 infostealer_mail: Collects personal data from local email clients
T1552 infostealer_browser: Retrieves personal information from local Internet browsers
T1552.001 infostealer_bitcoin: Attempts to obtain access to Bitcoin/ALTCoin wallets
T1555.004 windows_credential_manager: Acquire credentials from the Windows Credential Manager

Discovery

T1497.003 antisandbox_sleep: The process attempted to slow down analysis
T1057 process_interest: Enumerates processes
T1083 crawls_directories: Opens a huge number of directories all over disk C: (possibly, searches for sensitive data)
T1518 locates_browser: Attempts to identify where browsers are installed
T1497 evasion_printers: Attempts to detect Sandbox by exploring existing printers
T1497.001 antivm_queries_computername: Retrieves the computer name

Collection

T1114 infostealer_mail: Collects personal data from local email clients
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)
T1561 wiper_zeroed_bytes: Overwrites multiple files with zero bytes (hex 00)
T1490 vssadmin_delete_shadows: Attempt to delete volume shadow copies
T1486 ransomware_files_2: Ransomware(s) Roger indicators detected (creates keys and the instruction on how to unlock the files)
T1485 deletes_files: Removes 500 or more files from C: drive
T1565.001 overwrites_firefox_settings: Modifies Mozilla Firefox settings

Other

yara_rules: Static rules
ransomware_dharma: Detected Dharma ransomware
ransomware_shadowcopy: Removes volume shadow copies
creates_in_windows: Creates files in the Windows directory
runs_utility_without_cmdline: Runs system utility without arguments (non-typical usage)
copies_self: Creates a copy of itself
network_bind: Starts servers listening at None
creates_exe: Creates executable files in the file system
only_exec_in_archive: The archive contains only an executable file
create_rpc_bindings: Creates RPC connection
has_pdb: This executable file has a PDB path
creates_suspended_process: Creates suspended process
break_limit_exceeded: Warning: function calls limit has been exceeded
creates_in_programdata: Creates files in the ProgramData directory
suspicious_network_port: Performs TCP or UDP request to non-standard port
test_check_service: Starts services
archive_password_infected: Archive is protected by 'infected' password
checktokenmembership: Checks user token with CheckTokenMembership call
writes_data: Writes big amount of data to disk

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