MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 fe0ebbec69296e6fa9073104bb2f1448bdeeeb040511af7b3bad04fa529da38c. 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: 8


Intelligence 8 IOCs YARA 1 File information Comments
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SHA256 hash: fe0ebbec69296e6fa9073104bb2f1448bdeeeb040511af7b3bad04fa529da38c
SHA3-384 hash: 27b8c2cbdeefefb93c2050be8d0f9ea4fbcf2b116645f0adc883b60d07a292632359219212c05d6a599e42f04f4f2831
SHA1 hash: b697187ded059e330e334e8959b500b2720b7498
MD5 hash: d1e131610fac2e4923e4b41c143930c0
humanhash: undress-georgia-london-mexico
File name:RFQ-450987643.doc
Download: download sample
Signature Formbook
Create hunting rule
File size:1'560'843 bytes
First seen:2021-01-18 16:48:34 UTC
Last seen:2021-01-19 07:25:22 UTC
File type:Word file doc
MIME type:text/rtf
ssdeep 384:5DIQBGKc53BVhYdPX2Xg4lceyXZgokWwGeNwlSXfwgEXZR62YN3BVhYdPX2XDEXV:5giiDLty5Y1resq
TLSH 167500852A751202E9DA37D9FEFB3B46F22B3025A7C21050CA65DCF95C66D88D602CDF
Reporter lowmal3
Tags:FormBook

Intelligence

File Origin
# of uploads :
2
# of downloads :
114
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
RFQ-450987643.doc
Verdict:
Malicious activity
Analysis date:
2021-01-18 16:48:50 UTC
Tags:
ole-embedded exploit CVE-2017-11882
Link:
https://app.any.run/tasks/e825903b-28b5-4516-99b4-3cc7a8d8a0d2

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
SecuriteInfo.com.Rtf.Obfus-1.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
Using the Windows Management Instrumentation requests
Launching the default Windows debugger (dwwin.exe)
DNS request
Sending a custom TCP request
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
Verdict:
MALICIOUS
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/584043
Signature
Creates processes via WMI
Document exploit detected (creates forbidden files)
Found malware configuration
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
Obfuscated command line found
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: Microsoft Office Product Spawning Windows Shell
Sigma detected: Office product drops script at suspicious location
Sigma detected: Suspicious Svchost Process
Sigma detected: WScript or CScript Dropper
System process connects to network (likely due to code injection or exploit)
Tries to detect virtualization through RDTSC time measurements
Very long command line found
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 341060 Sample: RFQ-450987643.doc Startdate: 18/01/2021 Architecture: WINDOWS Score: 100 42 Found malware configuration 2->42 44 Malicious sample detected (through community Yara rule) 2->44 46 Multi AV Scanner detection for submitted file 2->46 48 11 other signatures 2->48 9 powershell.exe 4 136 2->9         started        13 WINWORD.EXE 292 25 2->13         started        16 EQNEDT32.EXE 47 2->16         started        process3 dnsIp4 40 cdn.discordapp.com 162.159.135.233, 443, 49165 CLOUDFLARENETUS United States 9->40 62 Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines) 9->62 64 Injects a PE file into a foreign processes 9->64 18 rundll32.exe 9->18         started        34 C:\Users\user\AppData\Local\Temp\Client.vbs, ASCII 13->34 dropped 66 Document exploit detected (creates forbidden files) 13->66 68 Microsoft Office drops suspicious files 13->68 70 Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802) 16->70 21 cmd.exe 16->21         started        file5 signatures6 process7 signatures8 50 Modifies the context of a thread in another process (thread injection) 18->50 52 Maps a DLL or memory area into another process 18->52 54 Sample uses process hollowing technique 18->54 56 2 other signatures 18->56 23 explorer.exe 18->23 injected 27 cscript.exe 21->27         started        process9 dnsIp10 36 www.kuroneko-goethe.life 183.90.248.10, 49167, 80 SAKURA-CSAKURAInternetIncJP Japan 23->36 38 www.eca-group.net 54.193.36.71, 49168, 80 AMAZON-02US United States 23->38 58 System process connects to network (likely due to code injection or exploit) 23->58 29 svchost.exe 23->29         started        60 Creates processes via WMI 27->60 signatures11 process12 signatures13 72 Modifies the context of a thread in another process (thread injection) 29->72 74 Maps a DLL or memory area into another process 29->74 76 Tries to detect virtualization through RDTSC time measurements 29->76 32 cmd.exe 29->32         started        process14
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/fe0ebbec69296e6fa9073104bb2f1448bdeeeb040511af7b3bad04fa529da38c/
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=7yhlx3djffxg7kihgeclwlyujc6652yeaui266z3vucpuuu5uoga._file
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook rat spyware stealer trojan
Link:
https://tria.ge/reports/210118-b9tsne8acn/
Behaviour
Enumerates system info in registry
Launches Equation Editor
Modifies Internet Explorer settings
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
Checks processor information in registry
NTFS ADS
Office loads VBA resources, possible macro or embedded object present
Drops file in Windows directory
Drops file in System32 directory
Suspicious use of SetThreadContext
Blocklisted process makes network request
Formbook Payload
Formbook
Process spawned unexpected child process
Malware Config
C2 Extraction:
http://www.priscilafiorini.com/rcm/
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/fe0ebbec69296e6fa9073104bb2f1448bdeeeb040511af7b3bad04fa529da38c

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:INDICATOR_RTF_EXPLOIT_CVE_2017_11882_4
Create hunting rule
Author:ditekSHen
Description:detects RTF variant documents potentially exploiting CVE-2018-0802 or CVE-2017-11882

File information

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

Malspam

Formbook

Word file doc fe0ebbec69296e6fa9073104bb2f1448bdeeeb040511af7b3bad04fa529da38c

(this sample)

  
Delivery method
Distributed via e-mail attachment

Comments