MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 d7aca49508336bd02576d53e3808504befccf7b241fe99ce0193fb74d81205d4. 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: 12
| SHA256 hash: | d7aca49508336bd02576d53e3808504befccf7b241fe99ce0193fb74d81205d4 |
|---|---|
| SHA3-384 hash: | 77e1276d7d107da73ff2f4f6508a6d86013add25081693c2ad6e823d9bc861a1f9ad8ada785d81b66ea831fdf6cb2ceb |
| SHA1 hash: | 1b5f9cd58bc817eebe91275b55558a2b11508af8 |
| MD5 hash: | f4c7f6f75b0bd401889447acb3d9c91b |
| humanhash: | skylark-moon-missouri-apart |
| File name: | f4c7f6f75b0bd401889447acb3d9c91b |
| Download: | download sample |
| Signature | GuLoader |
| File size: | 46'073 bytes |
| First seen: | 2023-08-06 04:21:37 UTC |
| Last seen: | Never |
| File type: |  rtf |
| MIME type: | text/rtf |
| ssdeep | 768:JwAbZSibMX9gRWjcM9ecJX3vArL+ARGDfJxNOCASN:JwAlRzifArMDtASN |
| TLSH | T170238D6DD34F02A9CF525277AB1A1A4442FDBB7EB38552B1305C433933EEC2D91292B9 |
| Reporter |  zbetcheckin |
| Tags: | CVE-2017-11882 GuLoader rtf |
Intelligence
File Origin
# of uploads :
1
# of downloads :
115
Origin country :
FRVendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
f4c7f6f75b0bd401889447acb3d9c91b
Verdict:
Malicious activity
Analysis date:
2023-08-06 10:18:05 UTC
Tags:
exploit cve-2017-11882 loader
Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Verdict:
Legit
File type:
application/rtf
Has a screenshot:
False
Contains macros:
False
Result
Verdict:
Malware
Maliciousness:
Behaviour
Searching for the window
Sending a custom TCP request
Searching for synchronization primitives
Launching a process
Creating a window
Creating a file in the %AppData% directory
Сreating synchronization primitives
Creating a file
Delayed reading of the file
Creating a file in the %temp% subdirectories
Sending an HTTP GET request to an infection source by exploiting the app vulnerability
Creating a process from a recently created file
Result
Verdict:
Malicious
File Type:
RTF File
Behaviour
BlacklistAPI detected
Verdict:
Malicious
Threat level:
10/10
Confidence:
100%
Tags:
control embedequation exploit lolbin shell32 shellcode
Verdict:
Malicious
Labled as:
CVE-2018-0802
Result
Verdict:
MALICIOUS
Result
Threat name:
GuLoader
Detection:
malicious
Classification:
troj.expl.evad
Score:
100 / 100
Signature
Antivirus / Scanner detection for submitted sample
Antivirus detection for URL or domain
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for domain / URL
Multi AV Scanner detection for dropped file
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)
Sigma detected: EQNEDT32.EXE connecting to internet
Sigma detected: File Dropped By EQNEDT32EXE
Tries to detect virtualization through RDTSC time measurements
Yara detected GuLoader
Behaviour
Behavior Graph:
Detection:
cve-2017-11882-shellcode
Threat name:
Document-Office.Exploit.CVE-2017-11882
Status:
Malicious
First seen:
2023-08-05 02:28:12 UTC
File Type:
Document
Extracted files:
3
AV detection:
17 of 24 (70.83%)
Threat level:
5/5
Detection(s):
Suspicious file
Result
Malware family:
n/a
Score:
8/10
Tags:
n/a
Behaviour
Launches Equation Editor
Suspicious behavior: AddClipboardFormatListener
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Drops file in Windows directory
Suspicious use of NtSetInformationThreadHideFromDebugger
Checks QEMU agent file
Executes dropped EXE
Loads dropped DLL
Blocklisted process makes network request
Downloads MZ/PE file
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
1.00
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 |
|---|---|
| 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 |
|---|---|
| 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
Delivery method
Distributed via web download
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