MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b5784dc5717d0733bcdd150fda07cc94bcc2e2529e0f03e3bb9ec9b623302496. 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


GuLoader


Vendor detections: 11


Intelligence 11 IOCs YARA 2 File information Comments 1
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: b5784dc5717d0733bcdd150fda07cc94bcc2e2529e0f03e3bb9ec9b623302496
SHA3-384 hash: e67c2cf06da88f93812c2ee53656b2d5a6fb907ff3b6fc57d509a56dc24a3b2f7789051a93dc9829a7517ca8c7ffa581
SHA1 hash: c4748fd11683b4b02e5bbc13746005a023f66568
MD5 hash: 79b064007e51e1cfb2f7c91c732242a9
humanhash: louisiana-zebra-salami-xray
File name:79b064007e51e1cfb2f7c91c732242a9
Download: download sample
Signature GuLoader
Create hunting rule
File size:18'403 bytes
First seen:2021-12-01 19:38:35 UTC
Last seen:Never
File type:Rich Text Format (RTF) rtf
MIME type:text/rtf
ssdeep 384:B8TOyxGioDT31T1cn2UXNaMoPjhaeFkfylzc:B8TjxmDT3CFNShpFUMc
TLSH T14D82FD7EF55B0E48AE96D678161AABA6024DF52D73C440E137BCDB38794C8178B22D3C
Reporter zbetcheckin
Tags:CVE-2017-11882 GuLoader rtf

Intelligence

File Origin
# of uploads :
1
# of downloads :
417
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
RFQ with Specification (Fitch Solutions).docx
Verdict:
Malicious activity
Analysis date:
2021-12-01 12:47:53 UTC
Tags:
generated-doc trojan opendir exploit CVE-2017-11882 loader
Link:
https://app.any.run/tasks/9ed8517b-2265-4be6-aaea-88ec73839709

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Verdict:
Malicious
File type:
application/rtf
Has a screenshot:
False
Contains macros:
False
Detection(s):
Sanesecurity.Malware.27301.RtfHeur.BadVer.UNOFFICIAL
Create hunting rule

SecuriteInfo.com.FakeRTF-2.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.RTFFakeVersionWithObjUpdateUKSurfMix.20200514.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
DNS request
Creating a window
Сreating synchronization primitives
Result
Verdict:
Malicious
File Type:
RTF File
Link:
https://app.docguard.net/b5784dc5717d0733bcdd150fda07cc94bcc2e2529e0f03e3bb9ec9b623302496/results/dashboard
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
embedequation exploit shellcode
Link:
https://www.filescan.io/uploads/61a7cf5a707a51cfe28a0f2a/reports/2d2c0cc5-c64e-4ec4-bab1-7dd832c5e26a/overview
Result
Verdict:
MALICIOUS
Link:
https://labs.inquest.net/dfi/sha256/b5784dc5717d0733bcdd150fda07cc94bcc2e2529e0f03e3bb9ec9b623302496
Result
Threat name:
GuLoader AgentTesla
Create hunting rule
Detection:
malicious
Classification:
troj.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/899746
Signature
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Drops PE files to the user root directory
Found malware configuration
GuLoader behavior detected
Hides threads from debuggers
Machine Learning detection for dropped file
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Office equation editor drops PE file
Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802)
Sigma detected: Droppers Exploiting CVE-2017-11882
Sigma detected: EQNEDT32.EXE connecting to internet
Sigma detected: Execution from Suspicious Folder
Sigma detected: File Dropped By EQNEDT32EXE
Tries to detect Any.run
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Writes to foreign memory regions
Yara detected AgentTesla
Yara detected GuLoader
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 532227 Sample: T81Ip9NCGi Startdate: 01/12/2021 Architecture: WINDOWS Score: 100 57 Found malware configuration 2->57 59 Antivirus detection for URL or domain 2->59 61 Antivirus detection for dropped file 2->61 63 15 other signatures 2->63 9 EQNEDT32.EXE 12 2->9         started        14 WINWORD.EXE 291 19 2->14         started        process3 dnsIp4 51 192.3.122.180, 49165, 80 AS-COLOCROSSINGUS United States 9->51 39 C:\Users\user\AppData\Local\...\vbc[1].exe, PE32 9->39 dropped 41 C:\Users\Public\vbc.exe, PE32 9->41 dropped 75 Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802) 9->75 16 vbc.exe 9 9->16         started        43 ~WRF{F8012674-B7CB...0-A31E79A66D61}.tmp, Composite 14->43 dropped file5 signatures6 process7 file8 35 C:\Users\user\AppData\Local\Temp\Acly3.exe, PE32 16->35 dropped 55 Multi AV Scanner detection for dropped file 16->55 20 Acly3.exe 16->20         started        signatures9 process10 signatures11 65 Writes to foreign memory regions 20->65 67 Tries to detect Any.run 20->67 69 Hides threads from debuggers 20->69 23 CasPol.exe 13 20->23         started        28 CasPol.exe 20->28         started        30 CasPol.exe 20->30         started        process12 dnsIp13 45 onedrive.live.com 23->45 47 fspzka.bl.files.1drv.com 23->47 49 2 other IPs or domains 23->49 37 C:\Users\user\AppData\Roaming\misv.exe, PE32 23->37 dropped 71 Tries to detect Any.run 23->71 73 Hides threads from debuggers 23->73 32 misv.exe 9 23->32         started        file14 signatures15 process16 signatures17 53 Machine Learning detection for dropped file 32->53
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/b5784dc5717d0733bcdd150fda07cc94bcc2e2529e0f03e3bb9ec9b623302496/
Threat name:
Document-RTF.Exploit.CVE-2017-11882
Create hunting rule
Status:
Malicious
First seen:
2021-12-01 19:39:12 UTC
File Type:
Document
Extracted files:
4
AV detection:
17 of 27 (62.96%)
Threat level:
  5/5
Result
Malware family:
guloader
Create hunting rule
Score:
  10/10
Tags:
family:guloader downloader
Link:
https://tria.ge/reports/211201-ycyyesaea3/
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: MapViewOfSection
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
Suspicious use of NtSetInformationThreadHideFromDebugger
Suspicious use of SetThreadContext
Checks QEMU agent file
Loads dropped DLL
Uses the VBS compiler for execution
Blocklisted process makes network request
Downloads MZ/PE file
Executes dropped EXE
Guloader,Cloudeye
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
0.99
Link:
https://yomi.yoroi.company/submissions/b5784dc5717d0733bcdd150fda07cc94bcc2e2529e0f03e3bb9ec9b623302496

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:BitcoinAddress
Create hunting rule
Author:Didier Stevens (@DidierStevens)
Description:Contains a valid Bitcoin address
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.

File information

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

Web download

GuLoader

Rich Text Format (RTF) rtf b5784dc5717d0733bcdd150fda07cc94bcc2e2529e0f03e3bb9ec9b623302496

(this sample)

  
Delivery method
Distributed via web download
  
URLhaus
https://urlhaus.abuse.ch/url/1842725/

Comments


Avatar
zbet commented on 2021-12-01 19:38:37 UTC

url : hxxp://192.3.122.180/......w_W.....W.........-Ww........-----Www.----............wW--------....wW-/....wW.........-w-w------W-------Ww-------......Ww......---w.w--wW.W.wbk