Managed XDR

winrar.exe (Jeefo) — malware analysis report

File info

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

Environment

win7/x86 en

Hashes

SHA1
adaec05bde79c165238eb1eddeeb60cd4dd534d1
SHA256
7d8f511637df7414b112c6ef521d28788647adec67741fc713ccab82e8935957
MD5
3f314450d05667d8cf5aadd6c5ccf558

Malwares

  • Jeefo

Signatures

Execution

T1569.002 persistence_service: Starts newly created service

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

T1036 system_filename: Created a file named as a common system file
T1036 system_procname: Created a process named as a common system process
T1497.003 antisandbox_sleep: The process attempted to slow down analysis
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

Credential Access

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

Discovery

T1497.003 antisandbox_sleep: The process attempted to slow down analysis

Other

yara_rules: Static rules
creates_exe: Creates executable files in the file system
creates_in_windows: Creates files in the Windows directory
jeefo_mutexes: Jeefo Virus indicators detected (mutexes)
suspicious_process: Spawns a suspicious process
require_administrator: Requests administrator privileges
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

Related reports