Managed XDR

hanks-to-hard-work-and...edicated-irs-employees (Emotet, Tinba) — malware analysis report

File info

Filename
hanks-to-hard-work-and-long-hours-by-dedicated-irs-employees
File type
PE32 executable (GUI) Intel 80386, for MS Windows
File size
400 KB
First seen
Last seen

Environment

win7/x86 en

Hashes

SHA1
74ff04427acd93bc669407731f6055bab0a602b1
SHA256
6fb122a65f8368702bf5933b9699aa0a1bb880fe5e4666aae84cdfbd8e3a1b73
MD5
78dab6319724f32e9ac47c381ef8ee88

Malwares

  • Emotet
  • Tinba

Signatures

Persistence

T1543.003 creates_service: Creates a service, that will start automatically

Privilege Escalation

T1543.003 creates_service: Creates a service, that will start automatically
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
T1027.002 unnamed_memory_regions: Code was executed in unnamed regions
T1564.004 removes_zoneid_ads: Attempts to hide the indications that the file was downloaded from the Internet
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 antivm_queries_computername: Retrieves the computer name
T1497.003 antisandbox_sleep: The process attempted to slow down analysis

Credential Access

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

Discovery

T1057 process_interest: Enumerates processes
T1497.001 antivm_queries_computername: Retrieves the computer name
T1497.003 antisandbox_sleep: The process attempted to slow down analysis

Command and Control

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

Other

yara_rules: Static rules
banker_emotet: Emotet banking trojan indicators detected
creates_in_windows: Creates files in the Windows directory
dead_host: Connects to IP addresses that do not respond to requests
mimics_agent: Uses system User-Agent for requests
no_graphical_activity: No graphic activity
create_rpc_bindings: Creates RPC connection
break_limit_exceeded: Warning: function calls limit has been exceeded
get_policy_info: Retrieves information about a Policy object
test_check_service: Starts services
checktokenmembership: Checks user token with CheckTokenMembership call

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