General

  • Target

    DLL Injector Resou_nls..scr

  • Size

    571KB

  • Sample

    231208-crtrcsaa5t

  • MD5

    b6d15bc82d811c30d7e9633402bee9c2

  • SHA1

    c6fd47a1e8bb385bbce699d1e51b947e7fe780e2

  • SHA256

    8177a82bb9f46bb3a6b01b59eb6fbfc1bfebd9ba5147a5685ee49d6a9aa22002

  • SHA512

    fd76972ec643a9456d6612b96ca9eabd8ee23d9371d379777cc4cc7b7b31953e23373f60844a2559bea70cde86e72e55af2a052f1608aeb130fbbbf3033a860c

  • SSDEEP

    12288:o3ubKEsUNigEpgsI02qw67AjvhExMv3AO25aBcTA:aubKDgEpywweIAMohA

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

441d

C2

88.248.18.120:33918

Mutex

sdf324

Attributes
  • delay

    3

  • install

    false

  • install_file

    da44rks.exe

  • install_folder

    %AppData%

aes.plain

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Winlogoew

C2

46.1.103.124:2341

Mutex

Winlogore

Attributes
  • delay

    3

  • install

    false

  • install_file

    Winlog

  • install_folder

    %AppData%

aes.plain

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Winlogoewg

C2

46.1.103.124:9371

Mutex

Winlogoreg

Attributes
  • delay

    3

  • install

    false

  • install_file

    Winloggg

  • install_folder

    %AppData%

aes.plain

Targets

    • Target

      DLL Injector Resou_nls..scr

    • Size

      571KB

    • MD5

      b6d15bc82d811c30d7e9633402bee9c2

    • SHA1

      c6fd47a1e8bb385bbce699d1e51b947e7fe780e2

    • SHA256

      8177a82bb9f46bb3a6b01b59eb6fbfc1bfebd9ba5147a5685ee49d6a9aa22002

    • SHA512

      fd76972ec643a9456d6612b96ca9eabd8ee23d9371d379777cc4cc7b7b31953e23373f60844a2559bea70cde86e72e55af2a052f1608aeb130fbbbf3033a860c

    • SSDEEP

      12288:o3ubKEsUNigEpgsI02qw67AjvhExMv3AO25aBcTA:aubKDgEpywweIAMohA

    • AsyncRat

      AsyncRAT is designed to remotely monitor and control other computers written in C#.

    • Detect ZGRat V1

    • ZGRat

      ZGRat is remote access trojan written in C#.

    • Async RAT payload

    • Blocklisted process makes network request

    • Downloads MZ/PE file

    • Checks computer location settings

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

    • Drops startup file

    • Executes dropped EXE

    • Loads dropped DLL

    • Reads user/profile data of web browsers

      Infostealers often target stored browser data, which can include saved credentials etc.

    • UPX packed file

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

    • Adds Run key to start application

    • Legitimate hosting services abused for malware hosting/C2

    • Looks up external IP address via web service

      Uses a legitimate IP lookup service to find the infected system's external IP.

    • Suspicious use of SetThreadContext

MITRE ATT&CK Matrix ATT&CK v13

Execution

Scheduled Task/Job

1
T1053

Persistence

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Scheduled Task/Job

1
T1053

Privilege Escalation

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Scheduled Task/Job

1
T1053

Defense Evasion

Modify Registry

2
T1112

Subvert Trust Controls

1
T1553

Install Root Certificate

1
T1553.004

Credential Access

Unsecured Credentials

1
T1552

Credentials In Files

1
T1552.001

Discovery

Query Registry

1
T1012

System Information Discovery

2
T1082

Process Discovery

1
T1057

Collection

Data from Local System

1
T1005

Command and Control

Web Service

1
T1102

Tasks