MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 28c1ffe0cb33c5b6fdcc5d9352f061ec686e821e7d4346676c5bb702f2361fa3. 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: 16


Intelligence 16 IOCs YARA 2 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 28c1ffe0cb33c5b6fdcc5d9352f061ec686e821e7d4346676c5bb702f2361fa3
SHA3-384 hash: f591767c6d97aa272d3902b60e29df517de625e3b694dd124797af184c2d732436f8a70bae04b3eb40faca28c192dee5
SHA1 hash: 74241c8e7f4aa8656d5053077660f6e4c8afb6b8
MD5 hash: df476b115a000832a0d688c512418b64
humanhash: louisiana-spaghetti-maryland-wyoming
File name:wewewewewewewewew##################ewewewewewewe.doc
Download: download sample
Signature Formbook
Create hunting rule
File size:23'780 bytes
First seen:2023-06-13 09:08:18 UTC
Last seen:Never
File type:Word file doc
MIME type:text/rtf
ssdeep 384:zGd7klKcfXDQfC4b9Htjrp8PounsxkWuZAPivWHh/EplN3v9dZdSTf5u/mvMReW:CilKcfXKn9Nj+PouncknZmEplN9dZITO
TLSH T100B2F4565B8C4C61F26AE87B478DA00E09BCF23630C255C4BC9CE6B17B7D14E4B6B1B8
Reporter pr0xylife
Tags:15-223-2-12 CVE-2017-11882 doc FormBook

Intelligence

File Origin
# of uploads :
1
# of downloads :
321
Origin country :
US US
Vendor Threat Intelligence
Malware family:
formbook
Create hunting rule
ID:
1
File name:
wewewewewewewewew##################ewewewewewewe.doc
Verdict:
Malicious activity
Analysis date:
2023-06-13 09:10:43 UTC
Tags:
exploit cve-2017-11882 opendir loader formbook xloader trojan stealer
Link:
https://app.any.run/tasks/68acb143-fc0d-4dbf-a931-a62014821e36

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
Sanesecurity.Shelter.Malware.BadRtf.ObjUpd.UNOFFICIAL
Create hunting rule

MiscreantPunch.RTF.2017-0199.Obfus.171711.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Searching for synchronization primitives
Launching a process
Creating a window
Creating a file
Сreating synchronization primitives
Creating a file in the %AppData% subdirectories
Reading critical registry keys
Launching cmd.exe command interpreter
Creating a file in the %temp% directory
Sending an HTTP GET request
Forced shutdown of a system process
Creating a process from a recently created file
Unauthorized injection to a system process
Result
Verdict:
Malicious
File Type:
Fake RTF File
Link:
https://app.docguard.net/28c1ffe0cb33c5b6fdcc5d9352f061ec686e821e7d4346676c5bb702f2361fa3/results/dashboard
Behaviour
BlacklistAPI detected
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
embedequation exploit packed shellcode
Link:
https://www.filescan.io/uploads/6488322ec6414862d206d50a/reports/2508e631-f0b2-4404-8d07-35a6ebd3e93a/overview
Verdict:
Malicious
Labled as:
CVE-2017-11882
Link:
https://www.hybrid-analysis.com/sample/28c1ffe0cb33c5b6fdcc5d9352f061ec686e821e7d4346676c5bb702f2361fa3
Label:
Malicious
Suspicious Score:
10/10
Score Malicious:
1%
Score Benign:
0%
Link:
https://www.malware.ai/gui/files/?id=163a7cef-a458-4465-829a-caac9f600e84
Result
Verdict:
MALICIOUS
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1253470
Signature
.NET source code contains method to dynamically call methods (often used by packers)
.NET source code contains potential unpacker
Allocates memory in foreign processes
Antivirus / Scanner detection for submitted sample
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Detected FormBook malware
Drops PE files to the user root directory
Found malware configuration
Injects a PE file into a foreign processes
Machine Learning detection for dropped file
Malicious sample detected (through community Yara rule)
Maps a DLL or memory area into another process
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 dropped file
Multi AV Scanner detection for submitted file
Office equation editor drops PE file
Office equation editor establishes network connection
Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802)
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
Shellcode detected
Sigma detected: EQNEDT32.EXE connecting to internet
Sigma detected: File Dropped By EQNEDT32EXE
Snort IDS alert for network traffic
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 / registry access)
Writes to foreign memory regions
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 886490 Sample: wewewewewewewewew##########... Startdate: 13/06/2023 Architecture: WINDOWS Score: 100 47 www.trenchlessbluebook.net 2->47 49 trenchlessbluebook.net 2->49 59 Snort IDS alert for network traffic 2->59 61 Found malware configuration 2->61 63 Malicious sample detected (through community Yara rule) 2->63 65 17 other signatures 2->65 11 EQNEDT32.EXE 12 2->11         started        16 WINWORD.EXE 336 17 2->16         started        18 EQNEDT32.EXE 2->18         started        signatures3 process4 dnsIp5 57 15.223.2.12, 49181, 80 AMAZON-02US United States 11->57 39 C:\Users\user\AppData\...\cleanmgr[1].exe, PE32+ 11->39 dropped 41 C:\Users\Public\cleanmgr_settings.exe, PE32+ 11->41 dropped 85 Office equation editor establishes network connection 11->85 87 Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802) 11->87 20 cleanmgr_settings.exe 11->20         started        file6 signatures7 process8 signatures9 67 Machine Learning detection for dropped file 20->67 69 Writes to foreign memory regions 20->69 71 Allocates memory in foreign processes 20->71 73 Injects a PE file into a foreign processes 20->73 23 RegSvcs.exe 20->23         started        process10 signatures11 75 Modifies the context of a thread in another process (thread injection) 23->75 77 Maps a DLL or memory area into another process 23->77 79 Sample uses process hollowing technique 23->79 81 2 other signatures 23->81 26 explorer.exe 2 23->26 injected process12 dnsIp13 51 www.mrislingo.com 45.39.26.93, 49182, 49183, 49184 EGIHOSTINGUS United States 26->51 53 wofhistory.com 66.235.200.147, 49185, 49186, 49187 CLOUDFLARENETUS United States 26->53 55 3 other IPs or domains 26->55 83 System process connects to network (likely due to code injection or exploit) 26->83 30 chkdsk.exe 15 26->30         started        signatures14 process15 file16 43 C:\Users\user\AppData\...\416logrv.ini, data 30->43 dropped 45 C:\Users\user\AppData\...\416logri.ini, data 30->45 dropped 89 Detected FormBook malware 30->89 91 Tries to steal Mail credentials (via file / registry access) 30->91 93 Tries to harvest and steal browser information (history, passwords, etc) 30->93 95 4 other signatures 30->95 34 firefox.exe 1 30->34         started        signatures17 process18 file19 37 C:\Users\user\AppData\...\416logrf.ini, data 34->37 dropped
Detection:
formbook
Create hunting rule
Link:
https://mwdb.cert.pl/sample/28c1ffe0cb33c5b6fdcc5d9352f061ec686e821e7d4346676c5bb702f2361fa3/
Threat name:
Document-RTF.Exploit.CVE-2017-11882
Create hunting rule
Status:
Malicious
First seen:
2023-06-13 09:09:04 UTC
File Type:
Document
Extracted files:
4
AV detection:
14 of 24 (58.33%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=fda77yglgpc3n7omlwjvf4db5rug5aq6pvbumz3mlo3qf4rwd6rq._file
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook campaign:hs95 rat spyware stealer trojan
Link:
https://tria.ge/reports/230613-k4fdhaff25/
Behaviour
Checks processor information in registry
Enumerates system info in registry
Launches Equation Editor
Modifies Internet Explorer settings
Modifies registry class
Suspicious behavior: AddClipboardFormatListener
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
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 Windows directory
Suspicious use of SetThreadContext
Executes dropped EXE
Loads dropped DLL
Reads user/profile data of web browsers
Blocklisted process makes network request
Downloads MZ/PE file
Formbook payload
Formbook
Malware family:
XLoader
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/28c1ffe0cb33/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/28c1ffe0cb33c5b6fdcc5d9352f061ec686e821e7d4346676c5bb702f2361fa3

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_MalVer_Objects
Create hunting rule
Author:ditekSHen
Description:Detects RTF documents with non-standard version and embeding one of the object mostly observed in exploit documents.
Rule name:SUSP_INDICATOR_RTF_MalVer_Objects
Create hunting rule
Author:ditekSHen
Description:Detects RTF documents with non-standard version and embedding one of the object mostly observed in exploit (e.g. CVE-2017-11882) documents.
Reference:https://github.com/ditekshen/detection

File information

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

Web download

Formbook

Word file doc 28c1ffe0cb33c5b6fdcc5d9352f061ec686e821e7d4346676c5bb702f2361fa3

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/2658985/
  
Delivery method
Distributed via web download

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