Managed XDR

installer.exe (njRAT) — malware analysis report

File info

Filename
installer.exe
File type
PE32+ executable (GUI) x86-64, for MS Windows
File size
2.3 MB
First seen
Last seen

Environment

win7/x64 en

Hashes

SHA1
425ca22a005eb739578a5e310958047317bf4771
SHA256
a3e7e15f7a9b3e2ea32e47bb7d2deb7ea11015aa8db48fdcd55dbad4e6104d79
MD5
4d0c3c8954df58813a2b420c2c874f51

Malwares

  • njRAT

Signatures

Initial Access

T1091 spreading_autoruninf: Creates an autorun.inf file

Execution

T1204.002 mimics_extension: Attempts to mimic the file extension

Persistence

T1547.001 persistence_autorun: Makes itself run automatically on Windows startup
T1574 dropper_dll: Creates DLL, which is then loaded into the process

Privilege Escalation

T1547.001 persistence_autorun: Makes itself run automatically on Windows startup
T1134 sets_privilegies_via_adjusttokenprivileges: Sets process privilege via AdjustTokenPrivileges
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

T1564.001 hides_original_file: Makes original executable file hidden
T1562 modify_security_warnings: Attempts to modify or disable security notifications
T1562.004 firewall_add_rule: Modifies Firewall rules
T1564.001 stealth_file: Creates hidden or system files
T1497.001 antivm_disk_size: Checks the amount of free disk space
T1497.002 antisandbox_foregroundwindows: Checks whether any human activity is being performed by constantly checking whether the foreground window has changed
T1497.003 antisandbox_sleep: The process attempted to slow down analysis
T1027.002 packer_entropy: Probably contains compressed or encrypted data
T1562 delete_fw_rule: Disables Firewall rules
T1036 system_filename: Created a file named as a common system file
T1036 system_procname: Created a process named as a common system process
T1027.002 pe_features: Executable file has PE anomalies (may be false positive)
T1574 dropper_dll: Creates DLL, which is then loaded into the process
T1036 mimics_extension: Attempts to mimic the file extension
T1134 sets_privilegies_via_adjusttokenprivileges: Sets process privilege via AdjustTokenPrivileges
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

T1056.001 infostealer_keylogger: Keylogger (intercepts keystrokes)

Discovery

T1497.001 antivm_disk_size: Checks the amount of free disk space
T1497.002 antisandbox_foregroundwindows: Checks whether any human activity is being performed by constantly checking whether the foreground window has changed
T1497.003 antisandbox_sleep: The process attempted to slow down analysis
T1082 uses_windows_utilities: Uses Windows utilities for basic Windows functionality

Lateral Movement

T1091 spreading_autoruninf: Creates an autorun.inf file

Collection

T1056.001 infostealer_keylogger: Keylogger (intercepts keystrokes)

Command and Control

T1071.001 network_http: Performs HTTP requests
T1071.001 wininet_https: Performs HTTP/HTTPS requests using WinInet

Other

yara_rules: Static rules
locker_taskmgr: Disables Windows Task Manager
creates_exe: Creates executable files in the file system
creates_in_windows: Creates files in the Windows directory
suspicious_process: Spawns a suspicious process
executes_dropped_exe: Executes dropped exe files
create_rpc_bindings: Creates RPC connection
has_pdb: This executable file has a PDB path
break_limit_exceeded: Warning: function calls limit has been exceeded
message_box: Displays a message
origin_langid: Unconventional language of the executable file
get_policy_info: Retrieves information about a Policy object

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