Managed XDR

c-users-user-appdata-l...dff7b86bedacbb7e97.tmp (Remcos) — malware analysis report

File info

Filename
c-users-user-appdata-local-temp-dff7b86bedacbb7e97.tmp
File type
Composite Document File V2 Document, Little Endian, Os: Windows, Version 6.2, Code page: 1252, Name of Creating Application: Microsoft Excel, Create Time/Date: Sat Sep 16 00:00:00 2006, Last Saved Time/Date: Mon May 13 02:06:58 2024, Security: 1
File size
420 KB
First seen
Last seen

Environment

win7/x86 en

Hashes

SHA1
cf0f0055a5b5533eab039cf7ff3b57940c780f36
SHA256
6e963b4725ef3b496e360de8a39bd2ca7231a7de9f31a8d52eb11822efc9c14c
MD5
a07706b0b327ff9f0cb761ca40060b36

Malwares

  • Remcos

Signatures

Execution

T1059.001 suspicious_powershell: Creates suspicious powershell process
T1059 network_wscript_downloader: Wscript.exe initiated network communication
T1203 exploit_CVE_2017_11882: Exploits CVE-2017-11882 vulnerability
T1059 powershell_cmd_longcommandline: Suspiciously long commandline
T1059 cmd_vbs: Detected command line that interacts with VBS-script
T1059 suspicious_process: Spawns a suspicious process
T1059.001 suspicious_process: Spawns a suspicious process
T1059.005 obfuscated_vbs: Detected obfuscated VBS
T1204.002 office_vb_load: Microsoft Office is loading VB DLL files (macros usage indicator)
T1059.001 url_cmdline: Cmdline of process contains URL
T1059.003 url_cmdline: Cmdline of process contains URL
T1064 office_macros: The document contains macro

Privilege Escalation

T1055.002 inject_write_pe: Writes PE file to another process's memory
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

Defense Evasion

T1218 bypass_dev_utils: Executing .NET utility in a suspended state, potentially for injection
T1055.002 inject_write_pe: Writes PE file to another process's memory
T1562 dep_disable: Disables DEP
T1027.002 unnamed_memory_regions_contains_pe: One or several unnamed memory regions are PE files
T1027.002 unnamed_memory_regions: Code was executed in unnamed regions
T1027 obfuscated_vbs: Detected obfuscated VBS
T1064 office_macros: The document contains macro
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
T1497 windows_enumthread: Attempts to enumerate windows using EnumThreadWindows and SendMessage for text obtaining
T1497.001 antisandbox_script_timer: Detected script timer window (indicative of sleep style evasion)
T1497.001 antivm_queries_computername: Retrieves the computer name
T1497.002 async_mouse: Watches for mouse clicks using GetAsyncKeyState to detect human activity

Credential Access

T1056.001 infostealer_keylogger: Keylogger (intercepts keystrokes)
T1555.003 cookie_files: Accesses cookie files
T1552 cookie_files: Accesses cookie files

Discovery

T1082 windows_enumthread: Attempts to enumerate windows using EnumThreadWindows and SendMessage for text obtaining
T1497 windows_enumthread: Attempts to enumerate windows using EnumThreadWindows and SendMessage for text obtaining
T1497.001 antisandbox_script_timer: Detected script timer window (indicative of sleep style evasion)
T1497.001 antivm_queries_computername: Retrieves the computer name
T1497.002 async_mouse: Watches for mouse clicks using GetAsyncKeyState to detect human activity
T1135 server_share_info: Retrieves information about each shared resource on a server
T1083 checks_recent_files: Attempt to check recently opened files through registry

Collection

T1056.001 infostealer_keylogger: Keylogger (intercepts keystrokes)
T1115 checks_clipboard: Monitors clipboard data

Command and Control

T1071 network_wscript_downloader: Wscript.exe initiated network communication
T1105 suspicious_download: Attempts to download suspicious file
T1071.001 network_cnc_http: Suspicious HTTP traffic
T1071.001 network_http: Performs HTTP requests
T1071.001 winhttp_https: Performs HTTP/HTTPS requests using WinHttp
T1071.001 wininet_openurl: Performs HTTP/HTTPS-requests using InternetOpenUrl
T1071.001 wininet_https: Performs HTTP/HTTPS requests using WinInet

Other

yara_rules: Static rules
ce_info: Remcos Configuration Data found
networkdyndns_checkip: Connects to a Dynamic DNS domain
code_share_services: Connects to text storage services (potentially for malicious payload delivery)
creates_exe: Creates executable files in the file system
modifies_certs: Attempts to generate or modify system certificates
suricata_alert: Malicious traffic detected
pdf_page: Contains only one page
suspicious_process_network: Unusual process network activity detected
creates_doc: Creates (office) documents in the file system
unexpected_exception: Unexpected exception
office_summary: The document contains suspicious metadata
create_rpc_bindings: Creates RPC connection
pdf_compressed_stream: Contains an object with compressed stream
creates_suspended_process: Creates suspended process
break_limit_exceeded: Warning: function calls limit has been exceeded
get_policy_info: Retrieves information about a Policy object
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
office_links: Office file contains external links
antisandbox_check_graphics_card: Uses CreateDXGIFactory, potentially to detect graphics card
checktokenmembership: Checks user token with CheckTokenMembership call

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