MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 49ad5c37af4babccff65ab341448e22b1e6392d3e20e7f59aff4f389f88faf12. 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: 14
| SHA256 hash: | 49ad5c37af4babccff65ab341448e22b1e6392d3e20e7f59aff4f389f88faf12 |
|---|---|
| SHA3-384 hash: | 6520c69e34af28d21a6b4a8d07d4731f54a5becdb1b9a3f05bf5124e9f594d6b420645bd7386f360b50dcc762db37514 |
| SHA1 hash: | 9d0b640920b4b0343772bc6c9d99942ee0addceb |
| MD5 hash: | 64d39883417401cc3d8ea3f76d4a9a50 |
| humanhash: | aspen-mockingbird-winner-venus |
| File name: | iuiu.doc |
| Download: | download sample |
| Signature | GuLoader |
| File size: | 24'134 bytes |
| First seen: | 2023-06-01 11:15:25 UTC |
| Last seen: | 2023-06-01 11:50:50 UTC |
| File type: |  doc |
| MIME type: | text/rtf |
| ssdeep | 384:oN9BGXL9vg6F+ISEECcOOj8/GexDO4wdO/ZTgW1G0BAWZxNpXWWwfMAlbkinEBvd:oN9ULlltSBOBX5OggxYA8TRTOMObHEBV |
| TLSH | T102B2D5565B8C4C61F269E8BB465EA00E19BCF23230C255C5BDDDE2B47B3D14E0B6B1B8 |
| Reporter |  JAMESWT_WT |
| Tags: | CVE-2017-11882 doc GuLoader |
Intelligence
File Origin
# of uploads :
2
# of downloads :
281
Origin country :
ITVendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
iuiu.doc
Verdict:
Malicious activity
Analysis date:
2023-06-01 11:16:43 UTC
Tags:
opendir
Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Result
Verdict:
Malware
Maliciousness:
Result
Verdict:
Malicious
File Type:
Fake RTF File
Behaviour
BlacklistAPI detected
Verdict:
Malicious
Threat level:
10/10
Confidence:
100%
Tags:
embedequation exploit lolbin shell32.dll shellcode
Verdict:
Malicious
Labled as:
CVE-2017-11882
Label:
Malicious
Suspicious Score:
10/10
Score Malicious:
1%
Score Benign:
0%
Result
Verdict:
MALICIOUS
Link:
Result
Threat name:
GuLoader
Detection:
malicious
Classification:
troj.expl.evad
Score:
100 / 100
Signature
Antivirus / Scanner detection for submitted sample
Drops PE files to the user root directory
Found evasive API chain (may stop execution after reading information in the PEB, e.g. number of processors)
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
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)
Shellcode detected
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-RTF.Exploit.CVE-2017-11882
Status:
Malicious
First seen:
2023-06-01 11:13:51 UTC
File Type:
Document
Extracted files:
4
AV detection:
13 of 24 (54.17%)
Threat level:
5/5
Detection(s):
Suspicious file
Result
Malware family:
n/a
Score:
10/10
Tags:
discovery
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
NSIS installer
Office loads VBA resources, possible macro or embedded object present
Enumerates physical storage devices
Drops file in Program Files directory
Drops file in Windows directory
Suspicious use of NtCreateThreadExHideFromDebugger
Suspicious use of NtSetInformationThreadHideFromDebugger
Suspicious use of SetThreadContext
Checks installed software on the system
Checks QEMU agent file
Checks computer location settings
Executes dropped EXE
Loads dropped DLL
Blocklisted process makes network request
Downloads MZ/PE file
Process spawned unexpected child process
Malware family:
GuLoader
Verdict:
Malicious
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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