Managed XDR

scratch-zoo-2025-04-30...ed6c13b0af1a33aa0c650d (Remcos) — malware analysis report

File info

Filename
scratch-zoo-2025-04-30-0e145f2a37ed6c13b0af1a33aa0c650d
File type
PE32 executable (GUI) Intel 80386, for MS Windows
File size
3.8 MB
First seen
Last seen

Environment

win7/x86 en

Hashes

SHA1
c6f3c7ad60b3cec25d877b9c3f05b613abb71a02
SHA256
bb7b8c5f6a8bc7b534e6d9f338c301d7bb14d8aec762739df7e309215a58d70f
MD5
0e145f2a37ed6c13b0af1a33aa0c650d

Malwares

  • Remcos

Signatures

Execution

T1059 network_wscript_downloader: Wscript.exe initiated network communication
T1053.005 creates_tasks: Creates a delayed task using Task Scheduler
T1053.005 persistence_autorun: Makes itself run automatically on Windows startup
T1059 autoit: AutoIt script execution detected
T1569.002 persistence_service: Starts newly created service
T1059.003 executes_dropped_cmd: Executes dropped batch files
T1047 has_wmi: Executes one or several WMI requests
T1059.005 obfuscated_vbs: Detected obfuscated VBS
T1059 wscript_info_discovery: Collects info about system with Wscript.Shell
T1059.003 suspicious_batch: Suspicious batch
T1204.002 mimics_extension: Attempts to mimic the file extension
T1106 susp_callbacks: Suspicious usage of some WinAPI with callbacks

Persistence

T1053.005 creates_tasks: Creates a delayed task using Task Scheduler
T1053.005 persistence_autorun: Makes itself run automatically on Windows startup
T1547.001 persistence_autorun: Makes itself run automatically on Windows startup
T1543.003 creates_service: Creates a service, that will start automatically
T1574 dropper_dll: Creates DLL, which is then loaded into the process

Privilege Escalation

T1134.004 ppid_spoofing: Parent pid spoofing detected
T1053.005 creates_tasks: Creates a delayed task using Task Scheduler
T1547.001 persistence_autorun: Makes itself run automatically on Windows startup
T1053.005 persistence_autorun: Makes itself run automatically on Windows startup
T1543.003 creates_service: Creates a service, that will start automatically
T1574 dropper_dll: Creates DLL, which is then loaded into the process
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

T1134.004 ppid_spoofing: Parent pid spoofing detected
T1027.002 unnamed_memory_regions: Code was executed in unnamed regions
T1497.001 antivm_generic_services: Enumerates services, possibly for anti-virtualization
T1574 dropper_dll: Creates DLL, which is then loaded into the process
T1497.003 antisandbox_sleep: The process attempted to slow down analysis
T1140 unpacking_utilities: Uses Windows utilities to unpack data
T1027 obfuscated_vbs: Detected obfuscated VBS
T1497.001 antivm_network_adapters: Checks NIC addresses
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
T1497.001 antisandbox_script_timer: Detected script timer window (indicative of sleep style evasion)
T1497.001 antivm_queries_computername: Retrieves the computer name
T1036 mimics_extension: Attempts to mimic the file extension
T1480 system_default_lang_id_present: Checks the system language
T1070 stealth_window: A process created a hidden window

Credential Access

T1552 cookie_files: Accesses cookie files
T1555.003 cookie_files: Accesses cookie files

Discovery

T1497.001 antivm_generic_services: Enumerates services, possibly for anti-virtualization
T1497.003 antisandbox_sleep: The process attempted to slow down analysis
T1057 process_interest: Enumerates processes
T1082 uses_windows_utilities: Uses Windows utilities for basic Windows functionality
T1497.001 antivm_network_adapters: Checks NIC addresses
T1518 locates_browser: Attempts to identify where browsers are installed
T1033 wscript_info_discovery: Collects info about system with Wscript.Shell
T1497.001 antisandbox_script_timer: Detected script timer window (indicative of sleep style evasion)
T1497.001 antivm_queries_computername: Retrieves the computer name
T1518 recon_programs: Collects information about installed programs
T1082 reads_csrss: Attempts to read csrss.exe memory

Command and Control

T1071 network_wscript_downloader: Wscript.exe initiated network communication
T1568.002 dga_domains: Connects to DGA domains
T1105 lolbin_extrac32: Download or Copy file with Extrac32
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

Impact

T1489 net_stop: Stops services through the use of net stop

Other

yara_rules: Static rules
ce_info: AteraAgent, Remcos Configuration Data found
networkdyndns_checkip: Connects to a Dynamic DNS domain
AteraAgent: AteraAgent application detected
drops_interpreter: Creates intrepreter binary file
creates_in_windows: Creates files in the Windows directory
modifies_certs: Attempts to generate or modify system certificates
ip_domains: Identifies an IP address using external resources
creates_exe: Creates executable files in the file system
suspicious_process_network: Unusual process network activity detected
dns_without_resolve: DNS query without a response
creates_doc: Creates (office) documents in the file system
executes_dropped_exe: Executes dropped exe files
create_rpc_bindings: Creates RPC connection
require_administrator: Requests administrator privileges
creates_suspended_process: Creates suspended process
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
suricata_alert: Malicious traffic detected

Related reports