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Analysis

  • max time kernel
    143s
  • max time network
    121s
  • platform
    windows7_x64
  • resource
    win7-20230831-en
  • resource tags

    arch:x64arch:x86image:win7-20230831-enlocale:en-usos:windows7-x64system
  • submitted
    12/10/2023, 07:58

General

  • Target

    Purchase List Xls.exe

  • Size

    1.1MB

  • MD5

    fdbce7853fd4e5e1e10d6060f6dae122

  • SHA1

    32a258bccbeda4b9bba2d7bbc4679a31fa58bb81

  • SHA256

    8838c8ec2ad1e7f3d9b4efcd3c0c2134507988c60915b2a2a6bf10eac2fb3cde

  • SHA512

    d2c60a96d930296644ff3672f371c070bc9510ecb479fcc9585d9eedc3b7b2fe0186360570d16aa6ab813c772b821dcd8d55b81752e9de86c136435c0711fbf3

  • SSDEEP

    24576:yV1gBwoZLueV335shh2AvxocjcmLH3yd2OluON4fA9uC:yV1zoQAZbAv2vmD3yd2OluON4fA9u

Malware Config

Extracted

Family

darkcloud

Attributes

Signatures

  • DarkCloud

    An information stealer written in Visual Basic.

  • Looks for VirtualBox Guest Additions in registry 2 TTPs 1 IoCs
  • Looks for VMWare Tools registry key 2 TTPs 1 IoCs
  • Checks BIOS information in registry 2 TTPs 2 IoCs

    BIOS information is often read in order to detect sandboxing environments.

  • Maps connected drives based on registry 3 TTPs 2 IoCs

    Disk information is often read in order to detect sandboxing environments.

  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Creates scheduled task(s) 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 13 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Purchase List Xls.exe
    "C:\Users\Admin\AppData\Local\Temp\Purchase List Xls.exe"
    1⤵
    • Looks for VirtualBox Guest Additions in registry
    • Looks for VMWare Tools registry key
    • Checks BIOS information in registry
    • Maps connected drives based on registry
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2220
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\sCCATp" /XML "C:\Users\Admin\AppData\Local\Temp\tmpB1F1.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:2760
    • C:\Users\Admin\AppData\Local\Temp\Purchase List Xls.exe
      "{path}"
      2⤵
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of SetWindowsHookEx
      PID:2784

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\tmpB1F1.tmp

    Filesize

    1KB

    MD5

    e76011000a46ba8fd4414a0302de3091

    SHA1

    f6f8ae08644043fd457d573ea09bb8ffaa9e02c8

    SHA256

    3c446dff8aa7408bafcebebe4d78c95ad4c3ad6cd3091b96a67831e70398d505

    SHA512

    c9d56ca11e3dd5ee473a6e1f8be777087d853fce0e3e870643ffa7f5e8a3dfe61299e7587099ffaece92cf9eb9ed393fcb7e33a2df61b924adb063b22afaf411

  • memory/2220-4-0x0000000074C30000-0x000000007531E000-memory.dmp

    Filesize

    6.9MB

  • memory/2220-1-0x0000000074C30000-0x000000007531E000-memory.dmp

    Filesize

    6.9MB

  • memory/2220-3-0x00000000005D0000-0x00000000005DC000-memory.dmp

    Filesize

    48KB

  • memory/2220-0-0x0000000000EA0000-0x0000000000FB8000-memory.dmp

    Filesize

    1.1MB

  • memory/2220-5-0x0000000004E90000-0x0000000004ED0000-memory.dmp

    Filesize

    256KB

  • memory/2220-6-0x0000000005430000-0x00000000054EA000-memory.dmp

    Filesize

    744KB

  • memory/2220-2-0x0000000004E90000-0x0000000004ED0000-memory.dmp

    Filesize

    256KB

  • memory/2220-7-0x00000000048C0000-0x0000000004942000-memory.dmp

    Filesize

    520KB

  • memory/2220-21-0x0000000074C30000-0x000000007531E000-memory.dmp

    Filesize

    6.9MB

  • memory/2784-11-0x0000000000400000-0x000000000047B000-memory.dmp

    Filesize

    492KB

  • memory/2784-13-0x0000000000400000-0x000000000047B000-memory.dmp

    Filesize

    492KB

  • memory/2784-15-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/2784-17-0x0000000000400000-0x000000000047B000-memory.dmp

    Filesize

    492KB

  • memory/2784-19-0x0000000000400000-0x000000000047B000-memory.dmp

    Filesize

    492KB

  • memory/2784-12-0x0000000000400000-0x000000000047B000-memory.dmp

    Filesize

    492KB

  • memory/2784-23-0x0000000000400000-0x000000000047B000-memory.dmp

    Filesize

    492KB