Overview

overview

10

Static

static

3

221121-antabafb8z.exe

windows7-x64

10

221121-antabafb8z.exe

windows10-2004-x64

10

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General

  • Target

    221121-antabafb8z

  • Size

    2.4MB

  • Sample

    240226-r7bm2sgf94

  • MD5

    3fcf77ffa0763350a1df45ab3b89f26a

  • SHA1

    0431c506fb86f1813621bc0d09ba12389021cc6b

  • SHA256

    08b82e2125b63ec97ed8fb9cbf829ca31935b8dfa2f67be4d686353570554281

  • SHA512

    07568d02a3cddf5285cf3ea7ab4bc05fb3cc0739b4bd59c75bdf60f0950a52e4ecc2168f53d5f41031271716ecc8babd164e42007c1cdf9ba00e55124232b842

  • SSDEEP

    49152:wgwREifu1DBgutBPNbPz0F3SMzx5QPdqGbHpIAxKof9X7PID/n3ZkIe:wgwREvguPPxzsfTe8GbHjkofeD/n2z

Score
10/10
mimicevasionpersistenceransomwaretrojan

Malware Config

Targets

    • Target

      221121-antabafb8z

    • Size

      2.4MB

    • MD5

      3fcf77ffa0763350a1df45ab3b89f26a

    • SHA1

      0431c506fb86f1813621bc0d09ba12389021cc6b

    • SHA256

      08b82e2125b63ec97ed8fb9cbf829ca31935b8dfa2f67be4d686353570554281

    • SHA512

      07568d02a3cddf5285cf3ea7ab4bc05fb3cc0739b4bd59c75bdf60f0950a52e4ecc2168f53d5f41031271716ecc8babd164e42007c1cdf9ba00e55124232b842

    • SSDEEP

      49152:wgwREifu1DBgutBPNbPz0F3SMzx5QPdqGbHpIAxKof9X7PID/n3ZkIe:wgwREvguPPxzsfTe8GbHjkofeD/n2z

    Score
    10/10
    mimicevasionpersistenceransomwaretrojan

    • Detects Mimic ransomware

    • Mimic

      Ransomware family was first exploited in the wild in 2022.

      ransomwaremimic

    • Modifies security service

      evasion

    • UAC bypass

      evasiontrojan

    • Detects Windows exceutables bypassing UAC using CMSTP COM interfaces. MITRE (T1218.003)

    • Detects command variations typically used by ransomware

    • Detects executables containing anti-forensic artifacts of deleting USN change journal. Observed in ransomware

    • Detects executables containing commands for clearing Windows Event Logs

    • Modifies boot configuration data using bcdedit

      ransomwareevasion

    • Renames multiple (210) files with added filename extension

      This suggests ransomware activity of encrypting all the files on the system.

      ransomware

    • Deletes System State backups

      Uses wbadmin.exe to inhibit system recovery.

      ransomware

    • Sets file execution options in registry

      persistence

    • Checks computer location settings

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

    • Executes dropped EXE

    • Loads dropped DLL

    • Modifies system executable filetype association

      persistence

    • Windows security modification

      evasiontrojan

    • Adds Run key to start application

      persistence

    • Checks whether UAC is enabled

      evasiontrojan

    • Enumerates connected drives

      Attempts to read the root path of hard drives other than the default C: drive.

    • Drops file in System32 directory

    behavioral1behavioral2

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1
T1059

Persistence

Boot or Logon Autostart Execution

2
T1547

Registry Run Keys / Startup Folder

2
T1547.001

Create or Modify System Process

1
T1543

Windows Service

1
T1543.003

Event Triggered Execution

1
T1546

Change Default File Association

1
T1546.001

Privilege Escalation

Abuse Elevation Control Mechanism

1
T1548

Bypass User Account Control

1
T1548.002

Boot or Logon Autostart Execution

2
T1547

Registry Run Keys / Startup Folder

2
T1547.001

Create or Modify System Process

1
T1543

Windows Service

1
T1543.003

Event Triggered Execution

1
T1546

Change Default File Association

1
T1546.001

Defense Evasion

Abuse Elevation Control Mechanism

1
T1548

Bypass User Account Control

1
T1548.002

Impair Defenses

2
T1562

Disable or Modify Tools

2
T1562.001

Indicator Removal

1
T1070

File Deletion

1
T1070.004

Modify Registry

7
T1112

Credential Access

Discovery

Peripheral Device Discovery

2
T1120

Query Registry

4
T1012

System Information Discovery

5
T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Inhibit System Recovery

2
T1490

Tasks