MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 9881f1985f91d2f1f08dfe1d2d0a5376fdfb07dcedcb68260a413ad7c20264b2. 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
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 9881f1985f91d2f1f08dfe1d2d0a5376fdfb07dcedcb68260a413ad7c20264b2
SHA3-384 hash: 6e7befc44a04cb047d4b7979c34917f958f6d257f285a8be5a5233f99e6c1cf0c736a49f09787482930d9ce18470ac61
SHA1 hash: 774b615905305f562793d277d5f51fa185f285bc
MD5 hash: 00f7fd0977d3a97c55e36dfefec80af9
humanhash: nitrogen-nineteen-quebec-pizza
File name:Form.doc
Download: download sample
Signature GuLoader
Create hunting rule
File size:222'698 bytes
First seen:2022-04-14 13:51:53 UTC
Last seen:Never
File type:Word file doc
MIME type:text/plain
ssdeep 1536:iITDfpPIx7Jz7vH38zGllGoe6Rs4QidzFz76mAg5eeVhMDw5wfLU:iLDq6BdzFtr5RDAw5wfQ
TLSH T10F24D9B4684F0872D309DC1E24A8B645AE79FEE374C1557223AFE434CF9AAF29EC4541
Reporter abuse_ch
Tags:doc GuLoader

Intelligence

File Origin
# of uploads :
1
# of downloads :
365
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
Form.doc
Verdict:
Malicious activity
Analysis date:
2022-04-14 17:36:09 UTC
Tags:
ole-embedded
Link:
https://app.any.run/tasks/b52cad39-92b0-429f-945e-ef22464688b8

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Verdict:
Malicious
File type:
application/msword
Has a screenshot:
False
Contains macros:
False
Detection(s):
TwinWave.EvilDoc.DOCXSTRGOOD.RTFSTR.SCRIPTLET.200421.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.RTFSquiblyDooForeverYou.20210701.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Creating a file in the %temp% directory
Changing the Zone.Identifier stream
Creating a window
DNS request
Сreating synchronization primitives
Sending a custom TCP request
Creating a process with a hidden window
Creating a file in the %AppData% directory
Creating a process from a recently created file
Creating a file
Sending an HTTP GET request
Sending a custom TCP request by exploiting the app vulnerability
Launching a file downloaded from the Internet
Result
Verdict:
Malicious
File Type:
Fake RTF File
Link:
https://app.docguard.net/9881f1985f91d2f1f08dfe1d2d0a5376fdfb07dcedcb68260a413ad7c20264b2/results/dashboard
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
control.exe CVE-2017-0199 CVE-2017-8570 CVE-2017-8759 CVE-2018-8174 evasive exploit exploit powershell shell32.dll wscript
Link:
https://www.filescan.io/uploads/62582708eab80a7a6c135edc/reports/ccaa7d41-128a-4660-9c4f-7c06101c7a51/overview
Result
Verdict:
MALICIOUS
Result
Threat name:
GuLoader
Create hunting rule
Detection:
malicious
Classification:
troj.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/976918
Signature
Bypasses PowerShell execution policy
C2 URLs / IPs found in malware configuration
Document contains a stream with embedded javascript code
Document contains OLE streams with names of living off the land binaries
Document exploit detected (creates forbidden files)
Document exploit detected (drops PE files)
Document exploit detected (process start blacklist hit)
Found malware configuration
Found suspicious RTF objects
Injects files into Windows application
Malicious sample detected (through community Yara rule)
Microsoft Office creates scripting files
Multi AV Scanner detection for submitted file
Office process drops PE file
Powershell drops PE file
Sigma detected: Microsoft Office Product Spawning Windows Shell
Sigma detected: Powershell download and execute file
Sigma detected: PowerShell DownloadFile
Suspicious powershell command line found
Tries to detect virtualization through RDTSC time measurements
Tries to download and execute files (via powershell)
Yara detected GuLoader
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 609407 Sample: Form.doc Startdate: 14/04/2022 Architecture: WINDOWS Score: 100 51 Found malware configuration 2->51 53 Malicious sample detected (through community Yara rule) 2->53 55 Sigma detected: Powershell download and execute file 2->55 57 14 other signatures 2->57 7 WINWORD.EXE 302 47 2->7         started        process3 dnsIp4 45 raspy-dust-4208.com 45.86.86.40, 443, 49171, 49172 DALANETKZ Italy 7->45 35 C:\Users\user\AppData\...\thursday1[1].exe, PE32 7->35 dropped 37 C:\Users\user\Desktop\~$Form.doc, data 7->37 dropped 39 C:\Users\user\AppData\...\abdtfhgYgeghDp .scT, data 7->39 dropped 41 C:\Users\user\AppData\Local\...\58B95A7C.png, 370 7->41 dropped 61 Document exploit detected (creates forbidden files) 7->61 63 Suspicious powershell command line found 7->63 65 Tries to download and execute files (via powershell) 7->65 67 Microsoft Office creates scripting files 7->67 12 powershell.exe 12 7 7->12         started        17 powershell.exe 7->17         started        19 notepad.exe 7->19         started        21 2 other processes 7->21 file5 signatures6 process7 dnsIp8 47 raspy-dust-4208.com 12->47 43 C:\Users\user\AppData\Roaming\thursday1.exe, PE32 12->43 dropped 69 Powershell drops PE file 12->69 49 raspy-dust-4208.com 17->49 23 thursday1.exe 33 17->23         started        71 Injects files into Windows application 19->71 file9 signatures10 process11 file12 27 C:\Users\user\AppData\Local\...\System.dll, PE32 23->27 dropped 29 C:\Users\user\...\libpixbufloader-pnm.dll, PE32+ 23->29 dropped 31 C:\Users\user\AppData\...\basswasapi.dll, PE32+ 23->31 dropped 33 2 other files (none is malicious) 23->33 dropped 59 Tries to detect virtualization through RDTSC time measurements 23->59 signatures13
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/9881f1985f91d2f1f08dfe1d2d0a5376fdfb07dcedcb68260a413ad7c20264b2/
Threat name:
Script.Trojan.RTFObfustream
Create hunting rule
Status:
Malicious
First seen:
2022-04-14 13:52:09 UTC
File Type:
Document
Extracted files:
15
AV detection:
14 of 26 (53.85%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=tca7dgc7shjpd4en7yos2csto367wb645xfwqjqkie5npqqcmsza._file
Result
Malware family:
n/a
Score:
  10/10
Tags:
suricata
Link:
https://tria.ge/reports/220414-q6d64sbchn/
Behaviour
Checks processor information in registry
Enumerates system info in registry
Modifies Internet Explorer settings
Modifies registry class
NTFS ADS
Suspicious behavior: AddClipboardFormatListener
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Office loads VBA resources, possible macro or embedded object present
Drops file in Windows directory
Blocklisted process makes network request
Downloads MZ/PE file
Process spawned unexpected child process
suricata: ET MALWARE Possible Malicious Macro DL EXE Feb 2016
Malware Config
Dropper Extraction:
https://raspy-dust-4208.com/thursday1.exe
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/9881f1985f91/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/9881f1985f91d2f1f08dfe1d2d0a5376fdfb07dcedcb68260a413ad7c20264b2

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_Scripting
Create hunting rule
Author:ditekSHen
Description:detects CVE-2017-8759 or CVE-2017-8570 weaponized RTF documents.
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.

Comments