MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 664855cad59286954cebcb029394c69ecbaa1045c5688f370f4cf5c289b27962. 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: 10


Intelligence 10 IOCs YARA 3 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 664855cad59286954cebcb029394c69ecbaa1045c5688f370f4cf5c289b27962
SHA3-384 hash: 0d4affea2015cc27aca360e7dcdf64bc10903f1dfbf7a7536bda34cfde4aea74be352c354987caa2c4cbe731e3a8b115
SHA1 hash: fc1047de09e030f5714055b06c1b35af83108af3
MD5 hash: 790a91fc7a5b19031539a0499bfc8094
humanhash: uncle-delaware-carolina-glucose
File name:file.exe
Download: download sample
Signature GuLoader
Create hunting rule
File size:386'776 bytes
First seen:2023-03-13 09:39:29 UTC
Last seen:2023-03-13 11:28:46 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash 5f0c714c36e6cc016b3a1f4bc86559e4 (199 x GuLoader, 14 x Formbook, 4 x AgentTesla)
ssdeep 6144:JGemq9vVlEHiGxOb29rcxU9bZJJScUOcpZz9OJvDLH4NBTrkfltcA8yL:pmK9lmoiH9XSBNAJvPYotcY
Threatray 657 similar samples on MalwareBazaar
TLSH T1DA84E021E128BCCAD65799F01DBDA61441E8DF9D80E5450D7B79328A90F2383B49FF2E
TrID 47.3% (.EXE) Win32 Executable MS Visual C++ (generic) (31206/45/13)
15.9% (.EXE) Win64 Executable (generic) (10523/12/4)
9.9% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
7.6% (.EXE) Win16 NE executable (generic) (5038/12/1)
6.8% (.EXE) Win32 Executable (generic) (4505/5/1)
File icon (PE):PE icon
dhash icon 00d4888eb2fcfc00 (2 x GuLoader, 1 x AgentTesla)
Reporter abuse_ch
Tags:exe GuLoader signed

Code Signing Certificate

Organisation:
Issuer:
Algorithm:sha256WithRSAEncryption
Valid from:2023-02-01T01:09:38Z
Valid to:2026-01-31T01:09:38Z
Serial number: 33ab43d11c254e7d82ac43edc0bf591cba1b3f7a
Thumbprint Algorithm:SHA256
Thumbprint: 54eacfc5f31acf4e6e3be57f8fe5ccdd50859cf0857070bc22ebdf7b1b10a331
Source:This information was brought to you by ReversingLabs A1000 Malware Analysis Platform

Intelligence

File Origin
# of uploads :
2
# of downloads :
216
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
file.exe
Verdict:
Malicious activity
Analysis date:
2023-03-13 09:48:29 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/d01290d0-26a5-4f8d-86a4-e8884e067989

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/373950/
Detection(s):
SecuriteInfo.com.FileRepMalware.15442.32070.UNOFFICIAL
Create hunting rule

Result
Verdict:
Clean
Maliciousness:

Behaviour
Creating a window
Creating a file in the %AppData% subdirectories
Creating a file in the %temp% subdirectories
Result
Malware family:
n/a
Score:
  5/10
Tags:
n/a
Link:
https://dragonfly.certego.net/analysis/72924/overview
Behaviour
MalwareBazaar
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
buer comodo guloader overlay packed shell32.dll
Link:
https://www.filescan.io/uploads/640eef779455cf9fbc75d56b/reports/ffa8898c-47b4-4416-8aaf-040b39e67930/overview
Verdict:
Unknown
Link:
https://www.hybrid-analysis.com/sample/664855cad59286954cebcb029394c69ecbaa1045c5688f370f4cf5c289b27962
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/95ad2175-e606-49d4-8a26-de50ddb50cc2
Result
Threat name:
AgentTesla, GuLoader
Create hunting rule
Detection:
malicious
Classification:
troj.evad.spyw
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1192487
Signature
Multi AV Scanner detection for submitted file
Queries sensitive BIOS Information (via WMI, Win32_Bios & Win32_BaseBoard, often done to detect virtual machines)
Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines)
Tries to detect Any.run
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Tries to harvest and steal browser information (history, passwords, etc)
Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc)
Tries to steal Mail credentials (via file / registry access)
Writes to foreign memory regions
Yara detected AgentTesla
Yara detected GuLoader
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 12381 Sample: file.exe Startdate: 13/03/2023 Architecture: WINDOWS Score: 100 26 googlehosted.l.googleusercontent.com 2->26 28 drive.google.com 2->28 30 doc-10-5c-docs.googleusercontent.com 2->30 36 Multi AV Scanner detection for submitted file 2->36 38 Yara detected GuLoader 2->38 40 Yara detected AgentTesla 2->40 42 Tries to detect sandboxes and other dynamic analysis tools (process name or module or function) 2->42 8 file.exe 44 2->8         started        signatures3 process4 file5 18 C:\Users\...\api-ms-win-crt-stdio-l1-1-0.dll, PE32 8->18 dropped 20 api-ms-win-core-pr...sthreads-l1-1-1.dll, PE32+ 8->20 dropped 22 C:\Users\user\...\System.Xml.XmlDocument.dll, PE32 8->22 dropped 24 C:\Users\user\AppData\Local\...\System.dll, PE32 8->24 dropped 44 Writes to foreign memory regions 8->44 46 Tries to detect Any.run 8->46 12 CasPol.exe 11 8->12         started        signatures6 process7 dnsIp8 32 googlehosted.l.googleusercontent.com 142.250.185.161, 443, 49832 GOOGLEUS United States 12->32 34 drive.google.com 142.250.74.206, 443, 49831 GOOGLEUS United States 12->34 48 Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc) 12->48 50 Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines) 12->50 52 Tries to steal Mail credentials (via file / registry access) 12->52 54 3 other signatures 12->54 16 conhost.exe 12->16         started        signatures9 process10
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/664855cad59286954cebcb029394c69ecbaa1045c5688f370f4cf5c289b27962/
Threat name:
Win32.Trojan.GuLoader
Create hunting rule
Status:
Malicious
First seen:
2023-03-13 06:10:13 UTC
File Type:
PE (Exe)
Extracted files:
16
AV detection:
16 of 24 (66.67%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=mzeflswvskdjkthlzmbjhfggt3f2uecfyvui6nypjt24fcnspfra._file
Verdict:
unknown
Similar samples:
0faf5543b3fe80d01ba68547d5bf49813c8c93f9f942fdd46ecb684e47a93597
GuLoader
2c213f07c4fd57a1d8cebd5cc96e1756979c94c639012657f13e7e8e7c9bb55c
GuLoader
3d7428999a3bc90f003d9ea3673abc88c6d9988fc875d45c088dfe8f61fd3e0f
GuLoader
615e6c6d71b5e39a29970f555b48255519e5d7f9c956faa2f578f4c50365d046
GuLoader
7500744cb96ef00da3854791e50622a7c5c0e1cdcf0708c7a7755070509d90b5
GuLoader
98f3769bc2318575d1a8d3964c11a6d14b4be9aa380395f9dc3e368cbb465056
GuLoader
b75f0520f391edee50a5de8c5d0e65c544b8ed2da8323b42776fd0df788247d4
GuLoader
c3a1e3e128a54d44e9cc9d1e5d1e1628b7c20200aec86d0c06cb3fd719ec34f8
GuLoader
d6d829102bf6a3de1318d233cb20baad5c2e6608482923ff687a3be26d122b47
GuLoader
+ 647 additional samples on MalwareBazaar
Result
Malware family:
guloader
Create hunting rule
Score:
  10/10
Tags:
family:agenttesla family:guloader collection downloader keylogger spyware stealer trojan
Link:
https://tria.ge/reports/230313-lm7xvsbg31/
Behaviour
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
outlook_office_path
outlook_win_path
Enumerates physical storage devices
Program crash
Suspicious use of NtCreateThreadExHideFromDebugger
Suspicious use of NtSetInformationThreadHideFromDebugger
Suspicious use of SetThreadContext
Accesses Microsoft Outlook profiles
Legitimate hosting services abused for malware hosting/C2
Checks QEMU agent file
Loads dropped DLL
AgentTesla
Guloader,Cloudeye
Unpacked files
SH256 hash:
7342b73593b3aa1b15e3731bfb1afd1961802a5c66343bac9a2c737ee94f4e38
MD5 hash:
e23600029d1b09bdb1d422fb4e46f5a6
SHA1 hash:
5d64a2f6a257a98a689a3db9a087a0fd5f180096
Link:
https://www.unpac.me/results/b7336471-31d3-4ebf-bdca-e7b1d39728c2/
SH256 hash:
664855cad59286954cebcb029394c69ecbaa1045c5688f370f4cf5c289b27962
MD5 hash:
790a91fc7a5b19031539a0499bfc8094
SHA1 hash:
fc1047de09e030f5714055b06c1b35af83108af3
Link:
https://www.unpac.me/results/b7336471-31d3-4ebf-bdca-e7b1d39728c2/
Malware family:
GuLoader
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/664855cad592/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
GuLoader
Score:
0.90
Link:
https://yomi.yoroi.company/submissions/664855cad59286954cebcb029394c69ecbaa1045c5688f370f4cf5c289b27962

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:Ins_NSIS_Buer_Nov_2020_1
Create hunting rule
Author:Arkbird_SOLG
Description:Detect NSIS installer used for Buer loader
Rule name:PE_Digital_Certificate
Create hunting rule
Author:albertzsigovits
Rule name:shellcode
Create hunting rule
Author:nex
Description:Matched shellcode byte patterns

File information

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

Cape
Cape
https://www.capesandbox.com/analysis/373950/

Comments