Managed XDR

c-users-user-appdata-l...n.nxh-24-1661-4219.exe (DarkWatchman) — malware analysis report

File info

Filename
c-users-user-appdata-local-temp-y4ocnykn.nxh-24-1661-4219.exe
File type
PE32 executable (GUI) Intel 80386, for MS Windows
File size
595.5 KB
First seen
Last seen

Environment

win7/x86 en

Hashes

SHA1
51f118b6bde76b06489902c17e403b0b3d9aec6f
SHA256
f5f7f1bbc71fb6da221049d1fc7a31d1312b07da46accdcd76588e989488297b
MD5
e3f8bf7f2c6b0043f8961fc0ea43d0e4

Malwares

  • DarkWatchman

Signatures

Execution

T1059.001 suspicious_powershell: Creates suspicious powershell process
T1059 network_wscript_downloader: Wscript.exe initiated network communication
T1059 powershell_cmd_longcommandline: Suspiciously long commandline
T1059 suspicious_process: Spawns a suspicious process
T1059.001 suspicious_process: Spawns a suspicious process
T1053.005 creates_tasks: Creates a delayed task using Task Scheduler
T1047 antivm_wmi: Uses WMI to detect virtual environment
T1047 has_wmi: Executes one or several WMI requests
T1059 wscript_info_discovery: Collects info about system with Wscript.Shell
T1559.001 com_exec: Execution of Win32_Process.Create COM Method

Persistence

T1053.005 creates_tasks: Creates a delayed task using Task Scheduler
T1197 rat_darkwatchman: DarkWatchman RAT indicators detected

Privilege Escalation

T1053.005 creates_tasks: Creates a delayed task using Task Scheduler
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

T1070.004 deletes_self: Moves to different location or removes the original executable file
T1197 rat_darkwatchman: DarkWatchman RAT indicators detected
T1036.001 invalid_authenticode: Digital signature of the executable file has failed the verification
T1112 creates_largekey: Saves very large data in the registry, can be used to save the configuration or body of the malware
T1027.004 compiles_code: Compiles C# code
T1497 debugs_self: Creates a process and debugs it
T1497.001 antivm_wmi: Uses WMI to detect virtual environment
T1134 opens_thread_token: Opens the access token associated with a thread
T1134 opens_process_token: Opens the access token associated with a process
T1027.002 packer_entropy: Probably contains compressed or encrypted data
T1497.001 antisandbox_script_timer: Detected script timer window (indicative of sleep style evasion)
T1562.001 windows_defender_add_exclusion: Adds a path to Microsoft Defender exclusion list

Credential Access

T1056.001 infostealer_keylogger: Keylogger (intercepts keystrokes)

Discovery

T1497 debugs_self: Creates a process and debugs it
T1497.001 antivm_wmi: Uses WMI to detect virtual environment
T1082 has_wmi: Executes one or several WMI requests
T1518.001 wmi_check_av: Uses WMI to check for installed antivirus software
T1518 locates_browser: Attempts to identify where browsers are installed
T1497.001 antisandbox_script_timer: Detected script timer window (indicative of sleep style evasion)
T1082 wscript_info_discovery: Collects info about system with Wscript.Shell
T1033 wscript_info_discovery: Collects info about system with Wscript.Shell

Collection

T1056.001 infostealer_keylogger: Keylogger (intercepts keystrokes)

Command and Control

T1071 network_wscript_downloader: Wscript.exe initiated network communication
T1071.001 winhttp_https: Performs HTTP/HTTPS requests using WinHttp

Impact

T1490 vssadmin_delete_shadows: Attempt to delete volume shadow copies

Other

ransomware_shadowcopy: Removes volume shadow copies
creates_exe: Creates executable files in the file system
modifies_certs: Attempts to generate or modify system certificates
dead_host: Connects to IP addresses that do not respond to requests
no_graphical_activity: No graphic activity
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
message_box: Displays a message
get_policy_info: Retrieves information about a Policy object
test_check_service: Starts services
checktokenmembership: Checks user token with CheckTokenMembership call
pe_overlay: PE file contains overlay

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