Managed XDR

c-users-user-appdata-local-temp-csrss.exe (ZeroAccess) — malware analysis report

File info

Filename
c-users-user-appdata-local-temp-csrss.exe
File type
PE32 executable (GUI) Intel 80386, for MS Windows
File size
179.5 KB
First seen
Last seen

Environment

win7/x86 en

Hashes

SHA1
8552fc5a64e6555a3a40892b4a3e23fa94811b69
SHA256
63ca47dc2d995a4993b5daf2afc8b0edcb6c042765e299c2530f6ea5d897b5bd
MD5
dbf53c2182d1e8b86fc13d6be4bbb8d3

Malwares

  • ZeroAccess

Signatures

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

T1112 modify_proxy: Attempts to change proxy settings
T1027.002 unnamed_memory_regions: Code was executed in unnamed regions
T1497.001 antivm_disk_size: Checks the amount of free disk space
T1497.003 antisandbox_sleep: The process attempted to slow down analysis
T1027.002 packer_entropy: Probably contains compressed or encrypted data
T1036 system_filename: Created a file named as a common system file
T1134 opens_thread_token: Opens the access token associated with a thread
T1134 opens_process_token: Opens the access token associated with a process
T1480 system_default_lang_id_present: Checks the system language

Credential Access

T1552 infostealer_browser: Retrieves personal information from local Internet browsers
T1503 infostealer_browser: Retrieves personal information from local Internet browsers
T1555.003 cookie_files: Accesses cookie files
T1552 cookie_files: Accesses cookie files

Discovery

T1497.001 antivm_disk_size: Checks the amount of free disk space
T1497.003 antisandbox_sleep: The process attempted to slow down analysis

Command and Control

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

Other

yara_rules: Static rules
caon_rat_behavior: Exhibits behavior characteristics of BoxCaon RAT
copies_self: Creates a copy of itself
suricata_alert: Malicious traffic detected
network_bind: Starts servers listening at 127.0.0.1:63455
creates_exe: Creates executable files in the file system
dns_without_resolve: DNS query without a response
unexpected_exception: Unexpected exception
no_graphical_activity: No graphic activity
get_policy_info: Retrieves information about a Policy object

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