MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 83af6b250f20ac16f456087fa3da190876b423cecc42c2f624bb167f932e7d6e. 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: 15


Intelligence 15 IOCs YARA 2 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 83af6b250f20ac16f456087fa3da190876b423cecc42c2f624bb167f932e7d6e
SHA3-384 hash: dff8122fc396e72a6982807e485706b020d8d10a022000a59ad7207825c15b56a912a67de08162852286bf0cc2b9f37b
SHA1 hash: 968c540a22baf61c599f735090e79960905ea528
MD5 hash: d0327dcff2c3a4b19f4991a4e000c45a
humanhash: winter-rugby-muppet-hamper
File name:PURCHASE ORDER.doc
Download: download sample
Signature Formbook
Create hunting rule
File size:298'345 bytes
First seen:2024-05-22 18:12:06 UTC
Last seen:2024-05-22 18:41:17 UTC
File type:Word file doc
MIME type:text/rtf
ssdeep 6144:WwAYwAYwAYwAYwAYwAYwAYwAYwAYwATyVBt/:W
TLSH T1F654D22DD34B02598F620376AB571E5142BDBA7EF38552B1302C537933EAC3DA1252BE
Reporter abuse_ch
Tags:CVE-2017-11882 doc FormBook

Intelligence

File Origin
# of uploads :
2
# of downloads :
350
Origin country :
NL NL
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
83af6b250f20ac16f456087fa3da190876b423cecc42c2f624bb167f932e7d6e.doc
Verdict:
Suspicious activity
Analysis date:
2024-05-22 18:19:13 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/4d10cfe0-c8bc-4c70-9c0d-ecf68ef36139

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Verdict:
Legit
File type:
application/msword
Has a screenshot:
False
Contains macros:
False
Detection(s):
Sanesecurity.Malware.29015.RtfHeur.Msg.UNOFFICIAL
Create hunting rule

Sanesecurity.Shelter.Malware.BadRtf.ObjUpd.UNOFFICIAL
Create hunting rule

MiscreantPunch.EvilRTF.CommonLure.UNOFFICIAL
Create hunting rule

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

TwinWave.EvilDoc.RoomService.20230808.UNOFFICIAL
Create hunting rule

Verdict:
Malicious
Score:
96.5%
Link:
https://cyber-fortress.com/docs/result/index.php?id=664e36ec5ebf6665efb43676win7simulatehigh_evasion
Tags:
Network Office Static Stealth Agent
Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Searching for synchronization primitives
Launching a process
Using the Windows Management Instrumentation requests
Creating a window
Connection attempt to an infection source by exploiting the app vulnerability
Creating a file in the %AppData% directory
Сreating synchronization primitives
Launching a service
Creating a process with a hidden window
Query of malicious DNS domain
Launching a file downloaded from the Internet
Sending a TCP request to an infection source by exploiting the app vulnerability
Creating a process from a recently created file
Result
Verdict:
Malicious
File Type:
Fake RTF File
Link:
https://app.docguard.net/83af6b250f20ac16f456087fa3da190876b423cecc42c2f624bb167f932e7d6e/results/dashboard
Behaviour
BlacklistAPI detected
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Link:
https://www.filescan.io/uploads/664e35b4f0c7e56a745a9540/reports/d261c5b4-17df-4056-ad72-5195b584861f/overview
Verdict:
Malicious
Labled as:
CVE-2018-0798
Link:
https://www.hybrid-analysis.com/sample/83af6b250f20ac16f456087fa3da190876b423cecc42c2f624bb167f932e7d6e
Gathering data
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/1445959
Signature
.NET source code contains potential unpacker
Adds a directory exclusion to Windows Defender
Antivirus detection for URL or domain
Document exploit detected (process start blacklist hit)
Drops PE files with a suspicious file extension
Found direct / indirect Syscall (likely to bypass EDR)
Injects a PE file into a foreign processes
Installs new ROOT certificates
Machine Learning detection for dropped file
Malicious sample detected (through community Yara rule)
Maps a DLL or memory area into another process
Multi AV Scanner detection for submitted file
Office document tries to convince victim to disable security protection (e.g. to enable ActiveX or Macros)
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)
Sigma detected: Equation Editor Network Connection
Sigma detected: Powershell Base64 Encoded MpPreference Cmdlet
Sigma detected: Scheduled temp file as task from temp location
Sigma detected: Suspicious Microsoft Office Child Process
Snort IDS alert for network traffic
Tries to harvest and steal browser information (history, passwords, etc)
Tries to steal Mail credentials (via file / registry access)
Uses schtasks.exe or at.exe to add and modify task schedules
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 1445959 Sample: PURCHASE ORDER.doc Startdate: 22/05/2024 Architecture: WINDOWS Score: 100 91 Snort IDS alert for network traffic 2->91 93 Malicious sample detected (through community Yara rule) 2->93 95 Antivirus detection for URL or domain 2->95 97 13 other signatures 2->97 11 WINWORD.EXE 336 14 2->11         started        13 taskeng.exe 2->13         started        process3 process4 15 EQNEDT32.EXE 11 11->15         started        20 EQNEDT32.EXE 11->20         started        22 NvdvsYVs.exe 13->22         started        dnsIp5 77 dukeenergyltd.top 188.114.97.3, 443, 49161 CLOUDFLARENETUS European Union 15->77 59 C:\Users\user\AppData\...\white90004.scr, PE32 15->59 dropped 61 C:\Users\user\AppData\Local\...\white[1].scr, PE32 15->61 dropped 79 Installs new ROOT certificates 15->79 81 Office equation editor establishes network connection 15->81 83 Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802) 15->83 24 white90004.scr 1 10 15->24         started        85 Machine Learning detection for dropped file 22->85 87 Adds a directory exclusion to Windows Defender 22->87 89 Injects a PE file into a foreign processes 22->89 28 powershell.exe 22->28         started        30 powershell.exe 22->30         started        32 schtasks.exe 22->32         started        34 NvdvsYVs.exe 22->34         started        file6 signatures7 process8 file9 65 C:\Users\user\AppData\Roaming65vdvsYVs.exe, PE32 24->65 dropped 67 C:\Users\user\AppData\Local\...\tmp14B9.tmp, XML 24->67 dropped 113 Machine Learning detection for dropped file 24->113 115 Uses schtasks.exe or at.exe to add and modify task schedules 24->115 117 Adds a directory exclusion to Windows Defender 24->117 119 Injects a PE file into a foreign processes 24->119 36 white90004.scr 24->36         started        39 powershell.exe 4 24->39         started        41 powershell.exe 4 24->41         started        43 schtasks.exe 24->43         started        signatures10 process11 signatures12 107 Maps a DLL or memory area into another process 36->107 45 bcJPZhantmOGMNAldkFOvFB.exe 36->45 injected 109 Installs new ROOT certificates 39->109 process13 signatures14 121 Maps a DLL or memory area into another process 45->121 123 Found direct / indirect Syscall (likely to bypass EDR) 45->123 48 icacls.exe 45->48         started        process15 dnsIp16 69 www.sqlite.org 45.33.6.223, 49163, 80 LINODE-APLinodeLLCUS United States 48->69 63 C:\Users\user\AppData\Local\...\sqlite3.dll, PE32 48->63 dropped 99 Tries to steal Mail credentials (via file / registry access) 48->99 101 Tries to harvest and steal browser information (history, passwords, etc) 48->101 103 Maps a DLL or memory area into another process 48->103 105 Queues an APC in another process (thread injection) 48->105 53 bcJPZhantmOGMNAldkFOvFB.exe 48->53 injected 57 firefox.exe 48->57         started        file17 signatures18 process19 dnsIp20 71 pls-immigration.com 185.98.131.152, 49162, 80 RMI-FITECHFR France 53->71 73 xn--2bin7yap-0kb.com 89.252.183.67, 49172, 49173, 49174 RADORETR Turkey 53->73 75 6 other IPs or domains 53->75 111 Found direct / indirect Syscall (likely to bypass EDR) 53->111 signatures21
Score:
100%
Verdict:
Malware
File Type:
SCRIPT
Link:
https://malprob.io/report/83af6b250f20ac16f456087fa3da190876b423cecc42c2f624bb167f932e7d6e
Detection:
cve-2017-11882-shellcode
Create hunting rule
Link:
https://mwdb.cert.pl/sample/83af6b250f20ac16f456087fa3da190876b423cecc42c2f624bb167f932e7d6e/
Threat name:
Document-RTF.Exploit.CVE-2017-11882
Create hunting rule
Status:
Malicious
First seen:
2024-05-22 07:28:20 UTC
File Type:
Document
Extracted files:
4
AV detection:
16 of 37 (43.24%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=qoxwwjipecwbn5cwbb72hwqzbb3lii6ozrbmf5rexmlh7ezopvxa._file
Result
Malware family:
n/a
Score:
  10/10
Tags:
discovery execution
Link:
https://tria.ge/reports/240522-wtr54abe2w/
Behaviour
Checks processor information in registry
Creates scheduled task(s)
Enumerates system info in registry
Launches Equation Editor
Modifies Internet Explorer settings
Modifies registry class
Suspicious behavior: AddClipboardFormatListener
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Office loads VBA resources, possible macro or embedded object present
Enumerates physical storage devices
Drops file in Windows directory
Drops file in System32 directory
Suspicious use of SetThreadContext
Executes dropped EXE
Loads dropped DLL
Modifies file permissions
Blocklisted process makes network request
Command and Scripting Interpreter: PowerShell
Downloads MZ/PE file
Process spawned unexpected child process
Verdict:
Suspicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/da3b6f98-6f67-46b2-bd92-95d2b568ac70
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/83af6b250f20/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/83af6b250f20ac16f456087fa3da190876b423cecc42c2f624bb167f932e7d6e

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.

Comments