General

  • Target

    bb57c20116377a50473e83604488f1935311dbf93a419cdeb41cf051ffd22b31

  • Size

    537KB

  • Sample

    221206-htazxsgg6v

  • MD5

    2ce459cbd15f96b92c6b411b9eaeb24c

  • SHA1

    d4ef5e179d1e4510141537bd59dca1d6fdb83a6a

  • SHA256

    bb57c20116377a50473e83604488f1935311dbf93a419cdeb41cf051ffd22b31

  • SHA512

    f5385c52c7945cfb2196edbda6aebd7007d383fc837712585c501387704709f9882f36559736b0804455a5c9eb09015d4f6e88135339c340c643554b0d4cb53c

  • SSDEEP

    12288:z4lThwQGIQilGzWTifG1g6eUt5uPPRg7zhTnn6wi8TQBVW6:slTOFq7TifGG6wR6TnRi8To

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

System Guard Runtime

C2

85.105.88.221:2531

Mutex

System Guard Runtime

Attributes
  • delay

    3

  • install

    false

  • install_file

    System Guard Runtime

  • install_folder

    %AppData%

aes.plain

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

DefenderSmartScren

C2

217.64.31.3:8437

Mutex

DefenderSmartScren

Attributes
  • delay

    3

  • install

    false

  • install_file

    SecurityHealtheurvice.exe

  • install_folder

    %AppData%

aes.plain

Targets

    • Target

      bb57c20116377a50473e83604488f1935311dbf93a419cdeb41cf051ffd22b31

    • Size

      537KB

    • MD5

      2ce459cbd15f96b92c6b411b9eaeb24c

    • SHA1

      d4ef5e179d1e4510141537bd59dca1d6fdb83a6a

    • SHA256

      bb57c20116377a50473e83604488f1935311dbf93a419cdeb41cf051ffd22b31

    • SHA512

      f5385c52c7945cfb2196edbda6aebd7007d383fc837712585c501387704709f9882f36559736b0804455a5c9eb09015d4f6e88135339c340c643554b0d4cb53c

    • SSDEEP

      12288:z4lThwQGIQilGzWTifG1g6eUt5uPPRg7zhTnn6wi8TQBVW6:slTOFq7TifGG6wR6TnRi8To

    • AsyncRat

      AsyncRAT is designed to remotely monitor and control other computers.

    • Async RAT payload

    • Blocklisted process makes network request

    • Downloads MZ/PE file

    • Executes dropped EXE

    • UPX packed file

      Detects executables packed with UPX/modified UPX open source packer.

    • Checks computer location settings

      Looks up country code configured in the registry, likely geofence.

    • Adds Run key to start application

    • Suspicious use of SetThreadContext

MITRE ATT&CK Matrix ATT&CK v6

Execution

Scheduled Task

1
T1053

Persistence

Registry Run Keys / Startup Folder

1
T1060

Scheduled Task

1
T1053

Privilege Escalation

Scheduled Task

1
T1053

Defense Evasion

Modify Registry

1
T1112

Discovery

Query Registry

1
T1012

System Information Discovery

2
T1082

Tasks