MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 5051a25b75ff32b562f56f5c138de98a3fc4d301ce6b2b7a7d6333faebab6936. 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: | 5051a25b75ff32b562f56f5c138de98a3fc4d301ce6b2b7a7d6333faebab6936 |
|---|---|
| SHA3-384 hash: | a31ed17981d30335a0d4892bcc38c164e5b06ef08816f8794d63f7bc848f9e7762a125618bc7b8e93311bfd2aecb82c4 |
| SHA1 hash: | a2e8844ff494b5839a91c94e8d92e8e63cf92ac0 |
| MD5 hash: | c3d12616fa86608c82def10c1cb58d9e |
| humanhash: | william-happy-texas-six |
| File name: | c3d12616fa86608c82def10c1cb58d9e |
| Download: | download sample |
| Signature | GuLoader |
| File size: | 27'653 bytes |
| First seen: | 2021-12-05 02:49:02 UTC |
| Last seen: | 2021-12-05 05:23:48 UTC |
| File type: |  rtf |
| MIME type: | text/rtf |
| ssdeep | 768:LKWlfFZdwg+R3wIfeGRm/O860I0WcrvauNs/YAMLtFOQ92:LBfFQg+BwIZRm/E0VFbauoYLLTx92 |
| TLSH | T172C2437EF58B0E48DE568669065A7B65064DF11D32C840E23BBCDB387A5CC5B8B23D38 |
| Reporter |  zbetcheckin |
| Tags: | CVE-2017-11882 guildma GuLoader rtf |
Intelligence
File Origin
# of uploads :
2
# of downloads :
440
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
c3d12616fa86608c82def10c1cb58d9e
Verdict:
Malicious activity
Analysis date:
2021-12-05 02:50:30 UTC
Tags:
opendir exploit CVE-2017-11882 loader
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
Result
Verdict:
Malware
Maliciousness:
Behaviour
Searching for the window
DNS request
Sending a custom TCP request
Searching for synchronization primitives
Launching a process
Creating a window
Creating a file
Сreating synchronization primitives
Creating a file in the %temp% directory
Sending an HTTP GET request
Creating a process from a recently created file
Result
Verdict:
Malicious
File Type:
RTF File
Verdict:
Likely Malicious
Threat level:
7.5/10
Confidence:
100%
Tags:
embedequation exploit
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 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 domain / URL
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 GuLoader
Behaviour
Behavior Graph:
Gathering data
Threat name:
Document-Office.Exploit.CVE-2017-11882
Status:
Malicious
First seen:
2021-12-04 01:27:42 UTC
File Type:
Document
Extracted files:
5
AV detection:
24 of 45 (53.33%)
Threat level:
5/5
Detection(s):
Suspicious file
Result
Malware family:
guloader
Score:
10/10
Tags:
family:agenttesla family:guloader downloader keylogger spyware stealer trojan
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: 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
Suspicious use of NtCreateThreadExHideFromDebugger
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
AgentTesla Payload
AgentTesla
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
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. |
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
Comments
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