Analysis

  • max time kernel
    1804s
  • max time network
    1818s
  • platform
    windows7_x64
  • resource
    win7-en-20211014
  • submitted
    22-10-2021 14:39

General

  • Target

    Fri05b5df5106928d62.exe

  • Size

    403KB

  • MD5

    962b4643e91a2bf03ceeabcdc3d32fff

  • SHA1

    994eac3e4f3da82f19c3373fdc9b0d6697a4375d

  • SHA256

    d2671668c6b2c9da5d319e60dea54361a2cbb362e46628cf0dccb5ff0baf786b

  • SHA512

    ef6f4a5ccfff09506c925003ac49837d771787028fddcf2183e98cba2794df375fd0d5099e36abf8fedfc0dddd10ad076d2fc69a77b8ffd8180215b5cfc88dfd

Malware Config

Signatures

  • Modifies Windows Defender Real-time Protection settings 3 TTPs
  • Downloads MZ/PE file
  • Executes dropped EXE 1 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Loads dropped DLL 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • Legitimate hosting services abused for malware hosting/C2 1 TTPs
  • Looks up external IP address via web service 2 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Fri05b5df5106928d62.exe
    "C:\Users\Admin\AppData\Local\Temp\Fri05b5df5106928d62.exe"
    1⤵
    • Checks computer location settings
    • Loads dropped DLL
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:460
    • C:\Users\Admin\Pictures\Adobe Films\K4tyIQLRuRMzUNmtrZtwIlOV.exe
      "C:\Users\Admin\Pictures\Adobe Films\K4tyIQLRuRMzUNmtrZtwIlOV.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious behavior: EnumeratesProcesses
      PID:948
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 460 -s 1080
      2⤵
      • Program crash
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      PID:1176

Network

MITRE ATT&CK Matrix ATT&CK v6

Persistence

Modify Existing Service

1
T1031

Defense Evasion

Modify Registry

1
T1112

Disabling Security Tools

1
T1089

Credential Access

Credentials in Files

1
T1081

Discovery

Query Registry

1
T1012

System Information Discovery

2
T1082

Collection

Data from Local System

1
T1005

Command and Control

Web Service

1
T1102

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\Pictures\Adobe Films\K4tyIQLRuRMzUNmtrZtwIlOV.exe
    MD5

    3f22bd82ee1b38f439e6354c60126d6d

    SHA1

    63b57d818f86ea64ebc8566faeb0c977839defde

    SHA256

    265c2ddc8a21e6fa8dfaa38ef0e77df8a2e98273a1abfb575aef93c0cc8ee96a

    SHA512

    b73e8e17e5e99d0e9edfb690ece8b0c15befb4d48b1c4f2fe77c5e3daf01df35858c06e1403a8636f86363708b80123d12122cb821a86b575b184227c760988f

  • \Users\Admin\Pictures\Adobe Films\K4tyIQLRuRMzUNmtrZtwIlOV.exe
    MD5

    3f22bd82ee1b38f439e6354c60126d6d

    SHA1

    63b57d818f86ea64ebc8566faeb0c977839defde

    SHA256

    265c2ddc8a21e6fa8dfaa38ef0e77df8a2e98273a1abfb575aef93c0cc8ee96a

    SHA512

    b73e8e17e5e99d0e9edfb690ece8b0c15befb4d48b1c4f2fe77c5e3daf01df35858c06e1403a8636f86363708b80123d12122cb821a86b575b184227c760988f

  • memory/460-55-0x0000000075B71000-0x0000000075B73000-memory.dmp
    Filesize

    8KB

  • memory/460-56-0x0000000003DE0000-0x0000000003F2A000-memory.dmp
    Filesize

    1.3MB

  • memory/948-58-0x0000000000000000-mapping.dmp
  • memory/1176-60-0x0000000000000000-mapping.dmp
  • memory/1176-61-0x00000000003B0000-0x0000000000410000-memory.dmp
    Filesize

    384KB