Overview

overview

7

Static

static

4

Coffalyser.Net.zip

windows10-2004-x64

7

Coffalyser.Net.msi

windows10-2004-x64

6

setup.exe

windows10-2004-x64

7

Analysis

  • max time kernel
    677s
  • max time network
    674s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240412-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
  • submitted
    26-04-2024 05:35

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General

  • Target

    setup.exe

  • Size

    551KB

  • MD5

    a6bfd232cd3f026cc10d2d7597007e2e

  • SHA1

    5d5d89ab30246607f5de4b16261bc979ec326b61

  • SHA256

    71d5516b46e73e7ce162aab263f02e12a45491f9f6877ddfba0ff4955515abc9

  • SHA512

    3ba12250612a5fec2693bd7ed590342270d1af66fb499f6857d435b3ece6c766b76cfc80325627f1cb2deaa78a269a9da290182549467f46bf47f76a4f951829

  • SSDEEP

    12288:4kJP0dKY+GshK6UTJUI72dW8eMb01JQntLOCMGle:4bdKJGnUIN8emMGA

Score
7/10

Malware Config

Signatures

  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Loads dropped DLL 2 IoCs
  • Enumerates connected drives 3 TTPs 46 IoCs

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

  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of WriteProcessMemory 6 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\setup.exe
    "C:\Users\Admin\AppData\Local\Temp\setup.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1776
    • C:\Windows\SysWOW64\msiexec.exe
      "C:\Windows\SysWOW64\msiexec.exe" -I "C:\Users\Admin\AppData\Local\Temp\Coffalyser.Net.msi"
      2⤵
      • Enumerates connected drives
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      PID:2520
  • C:\Windows\system32\msiexec.exe
    C:\Windows\system32\msiexec.exe /V
    1⤵
    • Enumerates connected drives
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2208
    • C:\Windows\syswow64\MsiExec.exe
      C:\Windows\syswow64\MsiExec.exe -Embedding 15DDBC50943944BA3FE6B55E03E31858 C
      2⤵
      • Loads dropped DLL
      PID:2752

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

2
T1012

System Information Discovery

3
T1082

Peripheral Device Discovery

1
T1120

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\MSI318F.tmp
    Filesize

    298KB

    MD5

    684f2d21637cb5835172edad55b6a8d9

    SHA1

    5eac3b8d0733aa11543248b769d7c30d2c53fcdb

    SHA256

    da1fe86141c446921021bb26b6fe2bd2d1bb51e3e614f46f8103ffad8042f2c0

    SHA512

    7b626c2839ac7df4dd764d52290da80f40f7c02cb70c8668a33ad166b0bcb0c1d4114d08a8754e0ae9c0210129ae7e885a90df714ca79bd946fbd8009848538c

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