Overview

overview

10

Static

static

8

f1b61e942e...3d.xls

windows7-x64

10

f1b61e942e...3d.xls

windows10-2004-x64

10

Analysis

  • max time kernel
    140s
  • max time network
    146s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    25-11-2024 21:10

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General

  • Target

    f1b61e942e02bf9d3ba3373d34fb69a925fa4bbb25dda27286996dc71979423d.xls

  • Size

    625KB

  • MD5

    efd3d1d5e1b815fd868f68d112b3394f

  • SHA1

    1e354b9180d20b2a3c3632caa3bec5ffbb8b7dfe

  • SHA256

    f1b61e942e02bf9d3ba3373d34fb69a925fa4bbb25dda27286996dc71979423d

  • SHA512

    362fa00ffea6d3f604bf465a9c05046ea53c8c25a03018d2b7fc00fdbd646f98d230e9516c04b6a1b5362a4e7bb64edd3fa4c0516f0ae81704d38892c35bbef7

  • SSDEEP

    6144:QZ+RwPONXoRjDhIcp0fDlavx+W26nA5knQ:4n

Score
10/10
crimsonratdiscoverypersistencerat

Malware Config

Extracted

Family

crimsonrat

C2

79.143.181.178

Signatures

  • CrimsonRAT main payload 1 IoCs
  • CrimsonRat

    Crimson RAT is a malware linked to a Pakistani-linked threat actor.

    ratcrimsonrat
  • Crimsonrat family
    crimsonrat
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 1 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
    persistence
  • System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

    discovery
  • Office loads VBA resources, possible macro or embedded object present
  • Enumerates system info in registry 2 TTPs 1 IoCs
  • Modifies registry class 64 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 5 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 3 IoCs
  • Suspicious use of WriteProcessMemory 4 IoCs

Processes

  • C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE
    "C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE" /dde C:\Users\Admin\AppData\Local\Temp\f1b61e942e02bf9d3ba3373d34fb69a925fa4bbb25dda27286996dc71979423d.xls
    1⤵
    • Loads dropped DLL
    • System Location Discovery: System Language Discovery
    • Enumerates system info in registry
    • Modifies registry class
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:2452
    • C:\Users\Admin\AppData\Roaming\Nxh5t9.exe
      C:\Users\Admin\AppData\Roaming\Nxh5t9.exe
      2⤵
      • Executes dropped EXE
      • Adds Run key to start application
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2656

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • \Users\Admin\AppData\Roaming\Nxh5t9.exe
    Filesize

    188KB

    MD5

    939c65b870c71b3a865b5bdd0476eb84

    SHA1

    4163c99b888a378be1d2c6fa45d20ce042d00252

    SHA256

    842699b57bef204fbe629835c0e6b3bbfd3093755ff9fe558bb6295f87d7cadb

    SHA512

    be86ed892c5cf4bf670708f018fc3d49cff1d84f6b7d2a31d9351b3e440e2d5de4dda8a1991efc2b07ac41cc2fb145e4c94c7c27bb98fbfa9d823d558e6b6d6c

    Download Submit

  • memory/2452-41-0x0000000006490000-0x0000000006590000-memory.dmp

    Filesize

    1024KB

    Download

  • memory/2452-25-0x0000000006490000-0x0000000006590000-memory.dmp

    Filesize

    1024KB

    Download

  • memory/2452-45-0x0000000006490000-0x0000000006590000-memory.dmp

    Filesize

    1024KB

    Download

  • memory/2452-19-0x0000000006490000-0x0000000006590000-memory.dmp

    Filesize

    1024KB

    Download

  • memory/2452-38-0x000000007207D000-0x0000000072088000-memory.dmp

    Filesize

    44KB

    Download

  • memory/2452-30-0x0000000006490000-0x0000000006590000-memory.dmp

    Filesize

    1024KB

    Download

  • memory/2452-1-0x000000007207D000-0x0000000072088000-memory.dmp

    Filesize

    44KB

    Download

  • memory/2452-44-0x0000000006490000-0x0000000006590000-memory.dmp

    Filesize

    1024KB

    Download

  • memory/2452-10-0x0000000006490000-0x0000000006590000-memory.dmp

    Filesize

    1024KB

    Download

  • memory/2452-4-0x0000000006490000-0x0000000006590000-memory.dmp

    Filesize

    1024KB

    Download

  • memory/2452-43-0x0000000006490000-0x0000000006590000-memory.dmp

    Filesize

    1024KB

    Download

  • memory/2452-0-0x000000005FFF0000-0x0000000060000000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2452-42-0x0000000006840000-0x0000000006940000-memory.dmp

    Filesize

    1024KB

    Download

  • memory/2656-36-0x000000006BF31000-0x000000006BF32000-memory.dmp

    Filesize

    4KB

    Download

  • memory/2656-39-0x000000006BF30000-0x000000006C4DB000-memory.dmp

    Filesize

    5.7MB

    Download

  • memory/2656-37-0x000000006BF30000-0x000000006C4DB000-memory.dmp

    Filesize

    5.7MB

    Download

  • memory/2656-46-0x000000006BF30000-0x000000006C4DB000-memory.dmp

    Filesize

    5.7MB

    Download