MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 545d40ade3522c1e3e361746d2575d0713ceb992658cb30cbca4d0cdc824e6e9. 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: 14


Intelligence 14 IOCs YARA 3 File information Comments
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SHA256 hash: 545d40ade3522c1e3e361746d2575d0713ceb992658cb30cbca4d0cdc824e6e9
SHA3-384 hash: e733967a25c00bd3c20ad8b5e747be48d471650596c83d0d07f690806892984388ea37d43112a9c2e8e15030f7b22c98
SHA1 hash: 1263e912a2bd08017a66a27bc057372499c4bfac
MD5 hash: 76423e939823bb7a5ebccb95e446dad1
humanhash: island-massachusetts-nuts-undress
File name:76423e939823bb7a5ebccb95e446dad1.rtf
Download: download sample
Signature Formbook
Create hunting rule
File size:76'381 bytes
First seen:2023-08-09 16:49:08 UTC
Last seen:2023-08-09 17:46:39 UTC
File type:Rich Text Format (RTF) rtf
MIME type:text/rtf
ssdeep 768:LwAbZSibMX9gRWjNXPRWgr/SqgtH1g1qE2zyvryDBOa:LwAlRczSdi1qE2zyvrAz
TLSH T18173136EC38F01A9CB565237AB1A0A0542FDB73EB34452B6306C437533EE83E51696BD
Reporter abuse_ch
Tags:CVE-2017-11882 FormBook rtf

Intelligence

File Origin
# of uploads :
2
# of downloads :
116
Origin country :
NL NL
Vendor Threat Intelligence
Malware family:
formbook
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ID:
1
File name:
76423e939823bb7a5ebccb95e446dad1.rtf
Verdict:
Malicious activity
Analysis date:
2023-08-09 16:50:01 UTC
Tags:
exploit cve-2017-11882 loader formbook xloader stealer spyware
Link:
https://app.any.run/tasks/f980d4d8-d7cb-47a4-a427-438ee2bac126

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
Sanesecurity.Malware.29015.RtfHeur.Msg.UNOFFICIAL
Create hunting rule

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

TwinWave.EvilDoc.RoomService.20230808.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 in the %AppData% directory
Сreating synchronization primitives
Launching cmd.exe command interpreter
Sending an HTTP GET request to an infection source by exploiting the app vulnerability
Creating a process from a recently created file
Unauthorized injection to a system process
Result
Verdict:
Malicious
File Type:
RTF File
Link:
https://app.docguard.net/545d40ade3522c1e3e361746d2575d0713ceb992658cb30cbca4d0cdc824e6e9/results/dashboard
Behaviour
BlacklistAPI detected
Gathering data
Verdict:
Malicious
Labled as:
CVE-2018-0802
Link:
https://www.hybrid-analysis.com/sample/545d40ade3522c1e3e361746d2575d0713ceb992658cb30cbca4d0cdc824e6e9
Result
Verdict:
MALICIOUS
Result
Threat name:
FormBook
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Detection:
malicious
Classification:
troj.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1288764
Signature
.NET source code contains method to dynamically call methods (often used by packers)
Antivirus / Scanner detection for submitted sample
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Document exploit detected (process start blacklist hit)
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 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)
Sample uses process hollowing technique
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
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 1288764 Sample: jcKGapir5p.rtf Startdate: 09/08/2023 Architecture: WINDOWS Score: 100 54 Snort IDS alert for network traffic 2->54 56 Found malware configuration 2->56 58 Malicious sample detected (through community Yara rule) 2->58 60 14 other signatures 2->60 10 EQNEDT32.EXE 11 2->10         started        15 WINWORD.EXE 290 19 2->15         started        17 EQNEDT32.EXE 2->17         started        process3 dnsIp4 44 2.59.254.18, 49161, 80 CMCSUS Germany 10->44 40 C:\Users\user\AppData\...\obiye9515878.exe, PE32 10->40 dropped 42 C:\Users\user\AppData\Local\...\obizx[1].exe, PE32 10->42 dropped 82 Office equation editor establishes network connection 10->82 84 Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802) 10->84 19 obiye9515878.exe 1 5 10->19         started        22 DW20.EXE 15->22         started        file5 signatures6 process7 signatures8 62 Machine Learning detection for dropped file 19->62 64 Tries to detect virtualization through RDTSC time measurements 19->64 66 Injects a PE file into a foreign processes 19->66 24 obiye9515878.exe 19->24         started        27 obiye9515878.exe 19->27         started        29 DWWIN.EXE 6 4 22->29         started        process9 signatures10 74 Modifies the context of a thread in another process (thread injection) 24->74 76 Maps a DLL or memory area into another process 24->76 78 Sample uses process hollowing technique 24->78 80 Queues an APC in another process (thread injection) 24->80 31 explorer.exe 1 5 24->31 injected process11 dnsIp12 46 www.realmpabq.com 31->46 48 www.rainydayroofs.com 31->48 50 3 other IPs or domains 31->50 52 System process connects to network (likely due to code injection or exploit) 31->52 35 cmstp.exe 31->35         started        signatures13 process14 signatures15 68 Modifies the context of a thread in another process (thread injection) 35->68 70 Maps a DLL or memory area into another process 35->70 72 Tries to detect virtualization through RDTSC time measurements 35->72 38 cmd.exe 35->38         started        process16
Detection:
formbook
Create hunting rule
Link:
https://mwdb.cert.pl/sample/545d40ade3522c1e3e361746d2575d0713ceb992658cb30cbca4d0cdc824e6e9/
Threat name:
Document-RTF.Exploit.CVE-2017-11882
Create hunting rule
Status:
Malicious
First seen:
2023-08-09 16:23:13 UTC
File Type:
Document
Extracted files:
3
AV detection:
16 of 38 (42.11%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=kroublpdkiwb4prwc5dnev25a4j45omsmwglgdf4utim3sbe43uq._file
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook campaign:oy30 rat spyware stealer trojan
Link:
https://tria.ge/reports/230809-vb9rradc68/
Behaviour
Launches Equation Editor
Suspicious behavior: AddClipboardFormatListener
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Drops file in Windows directory
Suspicious use of SetThreadContext
Executes dropped EXE
Loads dropped DLL
Blocklisted process makes network request
Downloads MZ/PE file
Formbook payload
Formbook
Malware family:
FormBook
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Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/545d40ade352/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/545d40ade3522c1e3e361746d2575d0713ceb992658cb30cbca4d0cdc824e6e9

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:DebuggerCheck__API
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Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
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

Rich Text Format (RTF) rtf 545d40ade3522c1e3e361746d2575d0713ceb992658cb30cbca4d0cdc824e6e9

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/2695769/
  
Delivery method
Distributed via web download

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