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Windows Analysis Report
yPIOW6yoPi.exe

Overview

General Information

Sample name:yPIOW6yoPi.exe
renamed because original name is a hash value
Original sample name:4d8f242a1d64b3b41748d2bd56ee6f7119434dedcdf793a83cea95fb31d13347.exe
Analysis ID:1588844
MD5:a0acd7920f09a59331e008f8d3dc7ac1
SHA1:f6bf51b2bccc91476136e43a91b17076ed78b083
SHA256:4d8f242a1d64b3b41748d2bd56ee6f7119434dedcdf793a83cea95fb31d13347
Tags:exeRemcosRATuser-adrian__luca
Infos:

Detection

Remcos
Score:100
Range:0 - 100
Whitelisted:false
Confidence:100%

Signatures

Antivirus / Scanner detection for submitted sample
Contains functionality to bypass UAC (CMSTPLUA)
Detected Remcos RAT
Detected unpacking (changes PE section rights)
Found malware configuration
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Sigma detected: Remcos
Suricata IDS alerts for network traffic
Yara detected Remcos RAT
Yara detected UAC Bypass using CMSTP
AI detected suspicious sample
C2 URLs / IPs found in malware configuration
Contains functionality to register a low level keyboard hook
Contains functionality to steal Chrome passwords or cookies
Contains functionality to steal Firefox passwords or cookies
Contains functionalty to change the wallpaper
Creates autostart registry keys with suspicious names
Delayed program exit found
Machine Learning detection for sample
AV process strings found (often used to terminate AV products)
Abnormal high CPU Usage
Checks if the current process is being debugged
Contains functionality for read data from the clipboard
Contains functionality to call native functions
Contains functionality to check if a debugger is running (IsDebuggerPresent)
Contains functionality to download and launch executables
Contains functionality to dynamically determine API calls
Contains functionality to enumerate process and check for explorer.exe or svchost.exe (often used for thread injection)
Contains functionality to enumerate running services
Contains functionality to launch a control a shell (cmd.exe)
Contains functionality to modify clipboard data
Contains functionality to query CPU information (cpuid)
Contains functionality to query locales information (e.g. system language)
Contains functionality to read the PEB
Contains functionality to read the clipboard data
Contains functionality to retrieve information about pressed keystrokes
Contains functionality to shutdown / reboot the system
Contains functionality to simulate mouse events
Contains functionality which may be used to detect a debugger (GetProcessHeap)
Creates a process in suspended mode (likely to inject code)
Detected TCP or UDP traffic on non-standard ports
Detected potential crypto function
Drops PE files
Extensive use of GetProcAddress (often used to hide API calls)
Found a high number of Window / User specific system calls (may be a loop to detect user behavior)
Found evaded block containing many API calls
Found large amount of non-executed APIs
Found potential string decryption / allocating functions
HTTP GET or POST without a user agent
IP address seen in connection with other malware
Internet Provider seen in connection with other malware
May sleep (evasive loops) to hinder dynamic analysis
One or more processes crash
Sample file is different than original file name gathered from version info
Sigma detected: CurrentVersion Autorun Keys Modification
Suricata IDS alerts with low severity for network traffic
Uses 32bit PE files
Uses Microsoft's Enhanced Cryptographic Provider
Uses code obfuscation techniques (call, push, ret)
Yara detected Keylogger Generic
Yara signature match

Classification

  • System is w10x64
  • yPIOW6yoPi.exe (PID: 1612 cmdline: "C:\Users\user\Desktop\yPIOW6yoPi.exe" MD5: A0ACD7920F09A59331E008F8D3DC7AC1)
    • WerFault.exe (PID: 3352 cmdline: C:\Windows\SysWOW64\WerFault.exe -u -p 1612 -s 1000 MD5: C31336C1EFC2CCB44B4326EA793040F2)
    • WerFault.exe (PID: 6248 cmdline: C:\Windows\SysWOW64\WerFault.exe -u -p 1612 -s 1008 MD5: C31336C1EFC2CCB44B4326EA793040F2)
    • WerFault.exe (PID: 4072 cmdline: C:\Windows\SysWOW64\WerFault.exe -u -p 1612 -s 1112 MD5: C31336C1EFC2CCB44B4326EA793040F2)
    • WerFault.exe (PID: 4896 cmdline: C:\Windows\SysWOW64\WerFault.exe -u -p 1612 -s 1120 MD5: C31336C1EFC2CCB44B4326EA793040F2)
    • WerFault.exe (PID: 5800 cmdline: C:\Windows\SysWOW64\WerFault.exe -u -p 1612 -s 1116 MD5: C31336C1EFC2CCB44B4326EA793040F2)
    • WerFault.exe (PID: 5936 cmdline: C:\Windows\SysWOW64\WerFault.exe -u -p 1612 -s 1120 MD5: C31336C1EFC2CCB44B4326EA793040F2)
    • WerFault.exe (PID: 4016 cmdline: C:\Windows\SysWOW64\WerFault.exe -u -p 1612 -s 1044 MD5: C31336C1EFC2CCB44B4326EA793040F2)
    • yavascript.exe (PID: 1512 cmdline: "C:\Users\user\AppData\Roaming\xenor\yavascript.exe" MD5: A0ACD7920F09A59331E008F8D3DC7AC1)
      • WerFault.exe (PID: 1016 cmdline: C:\Windows\SysWOW64\WerFault.exe -u -p 1512 -s 708 MD5: C31336C1EFC2CCB44B4326EA793040F2)
      • WerFault.exe (PID: 4144 cmdline: C:\Windows\SysWOW64\WerFault.exe -u -p 1512 -s 716 MD5: C31336C1EFC2CCB44B4326EA793040F2)
      • WerFault.exe (PID: 1340 cmdline: C:\Windows\SysWOW64\WerFault.exe -u -p 1512 -s 744 MD5: C31336C1EFC2CCB44B4326EA793040F2)
      • WerFault.exe (PID: 3192 cmdline: C:\Windows\SysWOW64\WerFault.exe -u -p 1512 -s 708 MD5: C31336C1EFC2CCB44B4326EA793040F2)
      • WerFault.exe (PID: 5756 cmdline: C:\Windows\SysWOW64\WerFault.exe -u -p 1512 -s 752 MD5: C31336C1EFC2CCB44B4326EA793040F2)
      • WerFault.exe (PID: 7004 cmdline: C:\Windows\SysWOW64\WerFault.exe -u -p 1512 -s 920 MD5: C31336C1EFC2CCB44B4326EA793040F2)
    • WerFault.exe (PID: 364 cmdline: C:\Windows\SysWOW64\WerFault.exe -u -p 1612 -s 1300 MD5: C31336C1EFC2CCB44B4326EA793040F2)
  • yavascript.exe (PID: 4196 cmdline: "C:\Users\user\AppData\Roaming\xenor\yavascript.exe" MD5: A0ACD7920F09A59331E008F8D3DC7AC1)
    • WerFault.exe (PID: 7132 cmdline: C:\Windows\SysWOW64\WerFault.exe -u -p 4196 -s 472 MD5: C31336C1EFC2CCB44B4326EA793040F2)
  • yavascript.exe (PID: 1352 cmdline: "C:\Users\user\AppData\Roaming\xenor\yavascript.exe" MD5: A0ACD7920F09A59331E008F8D3DC7AC1)
  • cleanup
NameDescriptionAttributionBlogpost URLsLink
Remcos, RemcosRATRemcos (acronym of Remote Control & Surveillance Software) is a commercial Remote Access Tool to remotely control computers.Remcos is advertised as legitimate software which can be used for surveillance and penetration testing purposes, but has been used in numerous hacking campaigns.Remcos, once installed, opens a backdoor on the computer, granting full access to the remote user.Remcos is developed by the cybersecurity company BreakingSecurity.
  • APT33
  • The Gorgon Group
  • UAC-0050
https://malpedia.caad.fkie.fraunhofer.de/details/win.remcos
{"Host:Port:Password": ["198.23.227.212:32583:1"], "Assigned name": "Yavakosa", "Connect interval": "1", "Install flag": "Enable", "Setup HKCU\\Run": "Enable", "Setup HKLM\\Run": "Disable", "Install path": "AppData", "Copy file": "yavascript.exe", "Startup value": "Disable", "Hide file": "Disable", "Mutex": "Rmc-I7G983", "Keylog flag": "0", "Keylog path": "Application path", "Keylog file": "logs.dat", "Keylog crypt": "Disable", "Hide keylog file": "Disable", "Screenshot flag": "Disable", "Screenshot time": "1", "Take Screenshot option": "Disable", "Take screenshot title": "", "Take screenshot time": "5", "Screenshot path": "AppData", "Screenshot file": "Screenshots", "Screenshot crypt": "Disable", "Mouse option": "Disable", "Delete file": "Disable", "Audio record time": "5", "Audio folder": "MicRecords", "Connect delay": "0", "Copy folder": "xenor", "Keylog folder": "remcos"}
SourceRuleDescriptionAuthorStrings
00000000.00000002.2295009749.0000000000530000.00000040.00001000.00020000.00000000.sdmpWindows_Trojan_RedLineStealer_ed346e4cunknownunknown
  • 0x778:$a: 55 8B EC 8B 45 14 56 57 8B 7D 08 33 F6 89 47 0C 39 75 10 76 15 8B
00000014.00000002.2309360524.0000000000600000.00000040.00001000.00020000.00000000.sdmpWindows_Trojan_RedLineStealer_ed346e4cunknownunknown
  • 0x778:$a: 55 8B EC 8B 45 14 56 57 8B 7D 08 33 F6 89 47 0C 39 75 10 76 15 8B
00000011.00000002.4625247428.000000000084E000.00000004.00000020.00020000.00000000.sdmpJoeSecurity_RemcosYara detected Remcos RATJoe Security
    00000000.00000002.2295191627.00000000005A4000.00000004.00000020.00020000.00000000.sdmpJoeSecurity_RemcosYara detected Remcos RATJoe Security
      00000026.00000002.2378502507.00000000020E0000.00000040.00001000.00020000.00000000.sdmpWindows_Trojan_RedLineStealer_ed346e4cunknownunknown
      • 0x778:$a: 55 8B EC 8B 45 14 56 57 8B 7D 08 33 F6 89 47 0C 39 75 10 76 15 8B