MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 2d81518e22ec06dbc7091008d55481d35fe15b3ebc931ad6960759ab11e8d4c0. 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: 8


Intelligence 8 IOCs YARA 5 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 2d81518e22ec06dbc7091008d55481d35fe15b3ebc931ad6960759ab11e8d4c0
SHA3-384 hash: 6596a9a4b29e362749704c5f323038a699d1becd4c6d74d6b6748ae79066950cd60faddc1e9ceff85c9277e67f3e56a1
SHA1 hash: c6e2c6ca63e3d377b2b7347ba4e2ad071f41e162
MD5 hash: a0d200834b8e4bce46520a97dd468053
humanhash: hydrogen-angel-east-missouri
File name:8825358c-c9a2-4b41-9da6-2ff1c62969d9
Download: download sample
Signature GuLoader
Create hunting rule
File size:9'525 bytes
First seen:2020-12-03 08:51:54 UTC
Last seen:Never
File type:Rich Text Format (RTF) rtf
MIME type:text/rtf
ssdeep 192:OPRVnQEl36HYtIN3gFvOm3JjhOgQFZ93DhfKiRcg+xj4+:URVnQElq4tIeROm3XiX1DhCab+Zn
TLSH EE126EE02D842A54F1FB1A448F3179A86D2BF27271E295F131DEDAA32F26146FFB1405
Reporter ankit_anubhav
Tags:GuLoader


Avatar
ankit_anubhav
malspam sent via autoreply@morningshines-webapp.shop

Office OLE Information

This malware samples appears to be an Office document. The following table provides more information about this document using oletools and oledump.

OLE dump

Intelligence

File Origin
# of uploads :
1
# of downloads :
293
Origin country :
n/a
Vendor Threat Intelligence
Detection(s):
Sanesecurity.Malware.27301.RtfHeur.BadVer.UNOFFICIAL
Create hunting rule

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

MiscreantPunch.RTF.2017-0199.Obfus.170830.UNOFFICIAL
Create hunting rule

MiscreantPunch.RTF.2017-0199.Obfus.171711.UNOFFICIAL
Create hunting rule

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

Result
Verdict:
Malware
Maliciousness:

Behaviour
Launching a process
Creating a window
Creating a file
DNS request
Sending a custom TCP request
Sending an HTTP GET request
Launching a file downloaded from the Internet
Unauthorized injection to a recently created process
Unauthorized injection to a recently created process by context flags manipulation
Creating a process from a recently created file
Result
Verdict:
Malicious
File Type:
RTF File
Link:
https://app.docguard.net/2d81518e22ec06dbc7091008d55481d35fe15b3ebc931ad6960759ab11e8d4c0/results/dashboard
Result
Verdict:
MALICIOUS
Result
Threat name:
GuLoader
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/554453
Signature
Contains functionality to hide a thread from the debugger
Drops PE files to the user root directory
Hides threads from debuggers
Installs a global keyboard hook
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)
Sample uses process hollowing technique
Sigma detected: Droppers Exploiting CVE-2017-11882
Sigma detected: EQNEDT32.EXE connecting to internet
Sigma detected: Executables Started in Suspicious Folder
Sigma detected: Execution in Non-Executable Folder
Sigma detected: File Dropped By EQNEDT32EXE
Sigma detected: Suspicious Program Location Process Starts
Tries to detect Any.run
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Tries to steal Crypto Currency Wallets
Yara detected GuLoader
Yara detected VB6 Downloader Generic
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 326325 Sample: 8825358c-c9a2-4b41-9da6-2ff... Startdate: 03/12/2020 Architecture: WINDOWS Score: 100 42 Multi AV Scanner detection for submitted file 2->42 44 Yara detected GuLoader 2->44 46 Sigma detected: EQNEDT32.EXE connecting to internet 2->46 48 9 other signatures 2->48 8 EQNEDT32.EXE 12 2->8         started        13 WINWORD.EXE 336 18 2->13         started        15 EQNEDT32.EXE 2->15         started        process3 dnsIp4 34 144.168.239.55, 49165, 80 AS-COLOCROSSINGUS Canada 8->34 28 C:\Users\user\AppData\...\Apocalypst[1].exe, PE32 8->28 dropped 30 C:\Users\Public\vbc.exe, PE32 8->30 dropped 58 Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802) 8->58 17 vbc.exe 1 8->17         started        file5 signatures6 process7 signatures8 36 Tries to detect Any.run 17->36 38 Hides threads from debuggers 17->38 40 Contains functionality to hide a thread from the debugger 17->40 20 vbc.exe 1 31 17->20         started        process9 dnsIp10 32 aap-ef.com 213.239.204.60, 443, 49166, 49167 HETZNER-ASDE Germany 20->32 50 Tries to detect Any.run 20->50 52 Sample uses process hollowing technique 20->52 54 Tries to steal Crypto Currency Wallets 20->54 56 2 other signatures 20->56 24 ilasm.exe 20->24         started        26 ilasm.exe 20->26         started        signatures11 process12
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/2d81518e22ec06dbc7091008d55481d35fe15b3ebc931ad6960759ab11e8d4c0/
Threat name:
Document-RTF.Exploit.CVE-2017-11882
Create hunting rule
Status:
Malicious
First seen:
2020-12-02 21:15:35 UTC
AV detection:
14 of 27 (51.85%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=fwavddrc5qdnxryjcaenkveb2np6cwz6xsjrvvuwa5m2wepi2taa._file
Result
Malware family:
n/a
Score:
  8/10
Tags:
spyware
Link:
https://tria.ge/reports/201203-xw88jhbecx/
Behaviour
Launches Equation Editor
Modifies Internet Explorer settings
Modifies system certificate store
Suspicious behavior: AddClipboardFormatListener
Suspicious behavior: GetForegroundWindowSpam
Suspicious behavior: MapViewOfSection
Suspicious use of FindShellTrayWindow
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Checks processor information in registry
Enumerates system info in registry
Office loads VBA resources, possible macro or embedded object present
Drops file in Windows directory
Suspicious use of NtSetInformationThreadHideFromDebugger
Suspicious use of SetThreadContext
Accesses cryptocurrency files/wallets, possible credential harvesting
Loads dropped DLL
Uses the VBS compiler for execution
Blacklisted process makes network request
Executes dropped EXE
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/2d81518e22ec06dbc7091008d55481d35fe15b3ebc931ad6960759ab11e8d4c0

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:Email_stealer_bin_mem
Create hunting rule
Author:James_inthe_box
Description:Email in files like avemaria
Rule name:IPPort_combo_mem
Create hunting rule
Author:James_inthe_box
Description:IP and port combo
Rule name:Select_from_enumeration
Create hunting rule
Author:James_inthe_box
Description:IP and port combo
Rule name:SharedStrings
Create hunting rule
Author:Katie Kleemola
Description:Internal names found in LURK0/CCTV0 samples
Rule name:UAC_bypass_bin_mem
Create hunting rule
Author:James_inthe_box
Description:UAC bypass in files like avemaria

File information

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

  
Delivery method
Distributed via e-mail link
  
URLhaus
https://urlhaus.abuse.ch/url/885296/

Comments