Managed XDR

icu.dll (FlawedGrace) — malware analysis report

File info

Filename
icu.dll
File type
PE32+ executable (DLL) (GUI) x86-64, for MS Windows
File size
660 KB
First seen
Last seen

Environment

win7/x64 en

Hashes

SHA1
3626d9e41eb520491f34cfa6a629b667eecaba53
SHA256
68582c972edf78521658e5941a28213d76766457613b7e5b0c162bc3722c65e9
MD5
9b73bc3fa3688355a7b7d96e7b3cb451

Malwares

  • FlawedGrace

Signatures

Privilege Escalation

T1055 injection_thread: Code injection to a remote process using CreateRemoteThread or NtQueueApcThread
T1055.002 inject_write_pe: Writes PE file to another process's memory
T1055.012 injection_runpe: Injects code into another process
T1134 sets_privilegies_via_adjusttokenprivileges: Sets process privilege via AdjustTokenPrivileges
T1134 sets_privilegies_via_rtladjustprivilege: Sets process privilege via RtlAdjustPrivilege
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

T1027.002 unnamed_memory_regions_contains_pe: One or several unnamed memory regions are PE files
T1055 injection_thread: Code injection to a remote process using CreateRemoteThread or NtQueueApcThread
T1055.002 inject_write_pe: Writes PE file to another process's memory
T1055.012 injection_runpe: Injects code into another process
T1027.002 unnamed_memory_regions: Code was executed in unnamed regions
T1112 creates_largekey: Saves very large data in the registry, can be used to save the configuration or body of the malware
T1027.002 packer_entropy: Probably contains compressed or encrypted data
T1497.001 antivm_queries_computername: Retrieves the computer name
T1134 sets_privilegies_via_adjusttokenprivileges: Sets process privilege via AdjustTokenPrivileges
T1134 sets_privilegies_via_rtladjustprivilege: Sets process privilege via RtlAdjustPrivilege
T1134 opens_thread_token: Opens the access token associated with a thread
T1134 opens_process_token: Opens the access token associated with a process

Discovery

T1057 process_interest: Enumerates processes
T1497.001 antivm_queries_computername: Retrieves the computer name

Other

yara_rules: Static rules
suspicious_process_network: Unusual process network activity detected
dns_without_resolve: DNS query without a response
no_graphical_activity: No graphic activity
get_policy_info: Retrieves information about a Policy object
open_winlogon_process: Trying to open winlogon process

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