Analysis

  • max time kernel
    150s
  • max time network
    122s
  • platform
    windows7_x64
  • resource
    win7-20231215-en
  • resource tags

    arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
  • submitted
    01-01-2024 15:12

General

  • Target

    7e623dca8a26a45440c331e383ac6ce3783d5c1bd60b91ee91ce0cc5841633e2.exe

  • Size

    219KB

  • MD5

    419ac67a37befc87317f2263e43bbccb

  • SHA1

    9a85595a04ac9f2c2b3dbf2a3ec171fc4486e3dd

  • SHA256

    7e623dca8a26a45440c331e383ac6ce3783d5c1bd60b91ee91ce0cc5841633e2

  • SHA512

    5a1fcacd280ba94f5178db1934b1122cf8e4359372e09812a57ae5601060e78f38f402a24a2b04dfe2fb7f6052cecce68df0aa9f41b48db34513cade81cd1969

  • SSDEEP

    3072:W5LZvmXjUjS/oewQhcyibDoO1iPN2HuzNUYi821BNL5kQdL:yLmQu/tJcToO1mNSuWYWIQN

Malware Config

Signatures

  • Dharma

    Dharma is a ransomware that uses security software installation to hide malicious activities.

  • Deletes shadow copies 2 TTPs

    Ransomware often targets backup files to inhibit system recovery.

  • Renames multiple (159) files with added filename extension

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

  • Drops startup file 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Drops desktop.ini file(s) 14 IoCs
  • Drops file in System32 directory 1 IoCs
  • Drops file in Program Files directory 64 IoCs
  • Interacts with shadow copies 2 TTPs 1 IoCs

    Shadow copies are often targeted by ransomware to inhibit system recovery.

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 10 IoCs
  • Uses Volume Shadow Copy service COM API

    The Volume Shadow Copy service is used to manage backups/snapshots.

Processes

  • C:\Users\Admin\AppData\Local\Temp\7e623dca8a26a45440c331e383ac6ce3783d5c1bd60b91ee91ce0cc5841633e2.exe
    "C:\Users\Admin\AppData\Local\Temp\7e623dca8a26a45440c331e383ac6ce3783d5c1bd60b91ee91ce0cc5841633e2.exe"
    1⤵
    • Drops startup file
    • Adds Run key to start application
    • Drops desktop.ini file(s)
    • Drops file in System32 directory
    • Drops file in Program Files directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:3008
    • C:\Windows\system32\cmd.exe
      "C:\Windows\system32\cmd.exe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2856
      • C:\Windows\system32\mode.com
        mode con cp select=1251
        3⤵
          PID:2960
        • C:\Windows\system32\vssadmin.exe
          vssadmin delete shadows /all /quiet
          3⤵
          • Interacts with shadow copies
          PID:2216
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:1644

    Network

    MITRE ATT&CK Matrix ATT&CK v13

    Persistence

    Boot or Logon Autostart Execution

    1
    T1547

    Registry Run Keys / Startup Folder

    1
    T1547.001

    Privilege Escalation

    Boot or Logon Autostart Execution

    1
    T1547

    Registry Run Keys / Startup Folder

    1
    T1547.001

    Defense Evasion

    Indicator Removal

    2
    T1070

    File Deletion

    2
    T1070.004

    Modify Registry

    1
    T1112

    Credential Access

    Unsecured Credentials

    1
    T1552

    Credentials In Files

    1
    T1552.001

    Collection

    Data from Local System

    1
    T1005

    Impact

    Inhibit System Recovery

    2
    T1490

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\MSOCache\All Users\{90140000-0011-0000-0000-0000000FF1CE}-C\osetup.dll.id-4D74230D.[decrypt@fros.cc].bgtx
      Filesize

      4.5MB

      MD5

      5019059ebb1cdec7e40470a95820415a

      SHA1

      166e7a8d29c9c7e4c5bf0461d79ef5df8d91dfa6

      SHA256

      5f5a4c4f6284e0de8a13b747a17f46ba1131f2da6b9d8ac3f1c37d3fa731a90b

      SHA512

      9dc4036433bab9b7472216e602ab9f17bea4096758edb1b20f86eee1cb638debf505255948551c0449547d9504252f1b421b43bfdbb563064c351f997cd8666b

    • memory/3008-1-0x00000000005C0000-0x00000000006C0000-memory.dmp
      Filesize

      1024KB

    • memory/3008-2-0x0000000000400000-0x000000000043C000-memory.dmp
      Filesize

      240KB

    • memory/3008-3912-0x0000000000400000-0x000000000043C000-memory.dmp
      Filesize

      240KB

    • memory/3008-3914-0x00000000005C0000-0x00000000006C0000-memory.dmp
      Filesize

      1024KB