Managed XDR

sim.exe — malware analysis report

File info

Filename
sim.exe
File type
PE32 executable (GUI) Intel 80386, for MS Windows, UPX compressed
File size
3.5 MB
First seen
Last seen

Environment

win7/x86 en

Hashes

SHA1
6fcee944db384bacdb6c7026364a25b09d502e7f
SHA256
5a30e055f6f82cd166a55727b7bcec6b83e268550b44b608a3aa915d90520abc
MD5
f86a964f449897a15367ee7219c3663c

Signatures

Execution

T1059 network_wscript_downloader: Wscript.exe initiated network communication
T1059.005 obfuscated_vbs: Detected obfuscated VBS
T1106 susp_callbacks: Suspicious usage of some WinAPI with callbacks

Persistence

T1574 dropper_dll: Creates DLL, which is then loaded into the process

Privilege Escalation

T1574 dropper_dll: Creates DLL, which is then loaded into the process
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

T1036.001 invalid_authenticode: Digital signature of the executable file has failed the verification
T1497.001 antivm_disk_size: Checks the amount of free disk space
T1027.002 packer_upx: The executable file is compressed using UPX
T1027 obfuscated_vbs: Detected obfuscated VBS
T1497.001 antisandbox_script_timer: Detected script timer window (indicative of sleep style evasion)
T1027.002 packer_entropy: Probably contains compressed or encrypted data
T1134 opens_thread_token: Opens the access token associated with a thread
T1134 opens_process_token: Opens the access token associated with a process
T1070 stealth_window: A process created a hidden window
T1480 system_default_lang_id_present: Checks the system language
T1574 dropper_dll: Creates DLL, which is then loaded into the process

Credential Access

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
T1497.001 antisandbox_script_timer: Detected script timer window (indicative of sleep style evasion)

Command and Control

T1071 network_wscript_downloader: Wscript.exe initiated network communication
T1071.001 wininet_https: Performs HTTP/HTTPS requests using WinInet

Other

yara_rules: Static rules
modifies_certs: Attempts to generate or modify system certificates
creates_exe: Creates executable files in the file system
executes_dropped_exe: Executes dropped exe files
pe_overlay_not_run: PE file contains executable files in overlay, which were not run
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