MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 02426893e1fb6b3cc4dba759e7d85a0da3696d4753921487b49bddc629d6ff77. While MalwareBazaar tries to identify whether the sample provided is malicious or not, there is no guarantee that a sample in MalwareBazaar is malicious.

Database Entry


Formbook


Vendor detections: 5


Intelligence 5 IOCs YARA 1 File information Comments
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SHA256 hash: 02426893e1fb6b3cc4dba759e7d85a0da3696d4753921487b49bddc629d6ff77
SHA3-384 hash: 777f688897e55d84ba385a454e78be7a5973043ed480ef8bda1def408789bf58d2bdd8b3349006705522294b857ff618
SHA1 hash: 36abaaf70244a713fd3033f64afd8823badd068e
MD5 hash: 63e31fd9190ac6115f7f0e86e55077ab
humanhash: winner-michigan-potato-fifteen
File name:Teklif Rusya 24 09 2020.doc
Download: download sample
Signature Formbook
Create hunting rule
File size:2'686'155 bytes
First seen:2020-09-24 09:19:42 UTC
Last seen:2020-09-24 09:41:20 UTC
File type:Word file doc
MIME type:text/rtf
ssdeep 1536:N+bGaqWjf+bGaqWPf+bGaqWvGnUbUbUbUbUbUbUbUbUJU3U3U3UJUjUJU3U3U3UN:vA
TLSH F8C5ED69E364C720B19312B60EB3DE27900C2A4FC58AD6A315A6ADBCC3538FDB11F55D
Reporter cocaman
Tags:doc FormBook


Avatar
cocaman
Malicious email (T1566.001)
From: "Burak BALLI <mohamed@garnnco.com>"
Received: "from mana0.garnnco.com (mana0.garnnco.com [143.110.145.187]) "
Date: "24 Sep 2020 02:07:11 -0700"
Subject: "Ynt: Teklif Rusya 24 09 2020"
Attachment: "Teklif Rusya 24 09 2020.doc"

Intelligence

File Origin
# of uploads :
2
# of downloads :
142
Origin country :
n/a
Vendor Threat Intelligence
Detection(s):
MiscreantPunch.RTF.2017-0199.Obfus.171711.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a file in the %temp% directory
Launching a process
Creating a window
Creating a process with a hidden window
Running batch commands
Using the Windows Management Instrumentation requests
Launching the default Windows debugger (dwwin.exe)
DNS request
Sending an HTTP GET request
Sending a custom TCP request
Deleting a recently created file
Bypassing of proactive protection methods using Windows Management Instrumentation (WMI)
Running batch commands by exploiting the app vulnerability
Creating a process from a recently created file
Launching a process by exploiting the app vulnerability
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/474099
Signature
Benign windows process drops PE files
Creates processes via WMI
Detected FormBook malware
Document exploit detected (creates forbidden files)
Found potential equation exploit (CVE-2017-11882)
Found suspicious RTF objects
Injects a PE file into a foreign processes
Malicious sample detected (through community Yara rule)
Maps a DLL or memory area into another process
Microsoft Office drops suspicious files
Modifies the context of a thread in another process (thread injection)
Modifies the prolog of user mode functions (user mode inline hooks)
Multi AV Scanner detection for submitted file
Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802)
Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines)
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
Sigma detected: Droppers Exploiting CVE-2017-11882
Sigma detected: Office product drops script at suspicious location
Sigma detected: WScript or CScript Dropper
Snort IDS alert for network traffic (e.g. based on Emerging Threat rules)
System process connects to network (likely due to code injection or exploit)
Tries to detect virtualization through RDTSC time measurements
Tries to harvest and steal browser information (history, passwords, etc)
Tries to steal Mail credentials (via file access)
Very long command line found
Writes to foreign memory regions
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 289495 Sample: Teklif Rusya 24 09 2020.doc Startdate: 24/09/2020 Architecture: WINDOWS Score: 100 79 Snort IDS alert for network traffic (e.g. based on Emerging Threat rules) 2->79 81 Malicious sample detected (through community Yara rule) 2->81 83 Multi AV Scanner detection for submitted file 2->83 85 9 other signatures 2->85 9 powershell.exe 7 2->9         started        13 powershell.exe 2->13         started        15 WINWORD.EXE 292 25 2->15         started        18 2 other processes 2->18 process3 dnsIp4 69 162.159.130.233, 443, 49169 CLOUDFLARENETUS United States 9->69 105 Writes to foreign memory regions 9->105 107 Injects a PE file into a foreign processes 9->107 20 calc.exe 9->20         started        23 calc.exe 13->23         started        67 C:\Users\user\AppData\Local\Temp\rht.vbs, ASCII 15->67 dropped 109 Document exploit detected (creates forbidden files) 15->109 111 Microsoft Office drops suspicious files 15->111 71 cdn.discordapp.com 162.159.135.233, 443, 49165, 49166 CLOUDFLARENETUS United States 18->71 113 Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines) 18->113 115 Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802) 18->115 25 cmd.exe 18->25         started        27 calc.exe 18->27         started        file5 signatures6 process7 signatures8 87 Modifies the context of a thread in another process (thread injection) 20->87 89 Maps a DLL or memory area into another process 20->89 91 Sample uses process hollowing technique 20->91 93 Queues an APC in another process (thread injection) 20->93 29 explorer.exe 20->29 injected 34 mstsc.exe 20->34         started        36 cscript.exe 25->36         started        95 Tries to detect virtualization through RDTSC time measurements 27->95 process9 dnsIp10 73 onstatic-fr.setupdns.net 81.88.57.68, 49175, 49176, 80 REGISTER-ASIT Italy 29->73 75 forastore.com 34.102.136.180, 49173, 49174, 80 GOOGLEUS United States 29->75 77 3 other IPs or domains 29->77 63 C:\Users\user\AppData\...\7nati0-xlrjdq.exe, PE32 29->63 dropped 65 C:\Program Files (x86)\...\7nati0-xlrjdq.exe, PE32 29->65 dropped 117 System process connects to network (likely due to code injection or exploit) 29->117 119 Benign windows process drops PE files 29->119 38 chkdsk.exe 29->38         started        42 7nati0-xlrjdq.exe 29->42         started        121 Tries to detect virtualization through RDTSC time measurements 34->121 123 Creates processes via WMI 36->123 44 cmd.exe 36->44         started        46 cmd.exe 36->46         started        48 cmd.exe 36->48         started        50 3 other processes 36->50 file11 signatures12 process13 file14 59 C:\Users\user\AppData\...\316logrv.ini, data 38->59 dropped 61 C:\Users\user\AppData\...\316logri.ini, data 38->61 dropped 97 Detected FormBook malware 38->97 99 Tries to steal Mail credentials (via file access) 38->99 101 Tries to harvest and steal browser information (history, passwords, etc) 38->101 103 4 other signatures 38->103 52 firefox.exe 38->52         started        55 cmd.exe 38->55         started        signatures15 process16 file17 57 C:\Users\user\AppData\...\316logrf.ini, data 52->57 dropped
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/02426893e1fb6b3cc4dba759e7d85a0da3696d4753921487b49bddc629d6ff77/
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
rat trojan spyware stealer family:formbook
Link:
https://tria.ge/reports/200924-xkj35c4t3n/
Behaviour
Enumerates system info in registry
Launches Equation Editor
Suspicious behavior: AddClipboardFormatListener
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
Suspicious use of SendNotifyMessage
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Office loads VBA resources, possible macro or embedded object present
Drops file in System32 directory
Suspicious use of SetThreadContext
Blacklisted process makes network request
Formbook Payload
Formbook
Process spawned unexpected child process
Malware Config
C2 Extraction:
http://www.bugam.info/pua/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Bloodhound
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/02426893e1fb6b3cc4dba759e7d85a0da3696d4753921487b49bddc629d6ff77

YARA Signatures

MalwareBazaar uses YARA rules from several public and non-public repositories, such as YARAhub and Malpedia. Those are being matched against malware samples uploaded to MalwareBazaar as well as against any suspicious process dumps they may create. Please note that only results from TLP:CLEAR rules are being displayed.

Rule name:MAL_RTF_Embedded_OLE_PE
Create hunting rule
Author:Florian Roth
Description:Detects a suspicious string often used in PE files in a hex encoded object stream
Reference:https://www.nextron-systems.com/2018/01/22/creating-yara-rules-detect-embedded-exe-files-ole-objects/

File information

The table below shows additional information about this malware sample such as delivery method and external references.

Malspam

Formbook

Word file doc 02426893e1fb6b3cc4dba759e7d85a0da3696d4753921487b49bddc629d6ff77

(this sample)

  
Delivery method
Distributed via e-mail attachment

Comments