MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 a873177a2d1bc01b7f331d6e382c5b38ecade35d8c37af365ea4e631b988e97a. 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: a873177a2d1bc01b7f331d6e382c5b38ecade35d8c37af365ea4e631b988e97a
SHA3-384 hash: 8b027ee4cae5a6dc63e1a2cbe8de43c3659236419ba1e04535cd91f0357332750ab7b21f92189e5f9f1b26f3e0645cfd
SHA1 hash: 64e6a8e4125ecd4c94b694a643e839f8567b86a0
MD5 hash: 3cbd2b8779df535e99e6dec86831a4ba
humanhash: hawaii-fix-texas-mobile
File name:file.exe
Download: download sample
Signature GuLoader
Create hunting rule
File size:389'184 bytes
First seen:2023-03-13 09:39:35 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash 5f0c714c36e6cc016b3a1f4bc86559e4 (199 x GuLoader, 14 x Formbook, 4 x AgentTesla)
ssdeep 6144:QGemq9vVNEHygTylm+ebOpcaZSOJf0jxY+/WDMTC8y8RQZ1nILtcA8:EmK9NKbOcaTJf0jy3DgH8notc
Threatray 658 similar samples on MalwareBazaar
TLSH T14684E012F168BCCADA5399F01CBDA61401F89F9D80E5450D7ABA329954F2383B85FF1E
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:2022-12-18T10:05:26Z
Valid to:2025-12-17T10:05:26Z
Serial number: 5a5d93f91e0f8e58c5a81c3d7421266a28ff399f
Thumbprint Algorithm:SHA256
Thumbprint: 58361f4753b5578e78ff0307de6159ddcec9a2450ae9ccdc4e4d189d8e6c0005
Source:This information was brought to you by ReversingLabs A1000 Malware Analysis Platform

Intelligence

File Origin
# of uploads :
1
# 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 09:49:02 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/a33e1574-b69d-416a-b995-852cdb5a371c

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/373951/
Result
Verdict:
Clean
Maliciousness:

Behaviour
Searching for the window
Creating a window
Creating a file in the %AppData% subdirectories
Creating a file in the %temp% subdirectories
Sending a custom TCP request
Result
Malware family:
n/a
Score:
  5/10
Tags:
n/a
Link:
https://dragonfly.certego.net/analysis/72925/overview
Behaviour
MalwareBazaar
Verdict:
Malicious
Threat level:
  10/10
Confidence:
83%
Tags:
buer comodo guloader overlay packed shell32.dll
Link:
https://www.filescan.io/uploads/640eef790a1d61c29c11fdd0/reports/7ff85f19-0d14-48d4-b0b1-bd937a87c461/overview
Verdict:
Unknown
Link:
https://www.hybrid-analysis.com/sample/a873177a2d1bc01b7f331d6e382c5b38ecade35d8c37af365ea4e631b988e97a
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/0fbd8faf-6b94-4de9-8fa8-c745bb1fa1bf
Result
Threat name:
AgentTesla, GuLoader
Create hunting rule
Detection:
malicious
Classification:
troj.evad.spyw
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1192379
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: 12375 Sample: file.exe Startdate: 13/03/2023 Architecture: WINDOWS Score: 100 28 spclient.wg.spotify.com 2->28 30 googlehosted.l.googleusercontent.com 2->30 32 3 other IPs or domains 2->32 38 Multi AV Scanner detection for submitted file 2->38 40 Yara detected GuLoader 2->40 42 Yara detected AgentTesla 2->42 44 Tries to detect sandboxes and other dynamic analysis tools (process name or module or function) 2->44 8 file.exe 53 2->8         started        signatures3 process4 file5 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\...\api-ms-win-crt-stdio-l1-1-0.dll, PE32 8->24 dropped 26 C:\Users\user\AppData\Local\...\System.dll, PE32 8->26 dropped 46 Writes to foreign memory regions 8->46 48 Tries to detect Any.run 8->48 12 CasPol.exe 11 8->12         started        16 CasPol.exe 8->16         started        signatures6 process7 dnsIp8 34 googlehosted.l.googleusercontent.com 142.250.184.193, 443, 49794 GOOGLEUS United States 12->34 36 drive.google.com 216.58.212.142, 443, 49793 GOOGLEUS United States 12->36 50 Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc) 12->50 52 Tries to steal Mail credentials (via file / registry access) 12->52 54 Tries to harvest and steal browser information (history, passwords, etc) 12->54 56 Tries to detect Any.run 12->56 18 conhost.exe 12->18         started        58 Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines) 16->58 60 Queries sensitive BIOS Information (via WMI, Win32_Bios & Win32_BaseBoard, often done to detect virtual machines) 16->60 signatures9 process10
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/a873177a2d1bc01b7f331d6e382c5b38ecade35d8c37af365ea4e631b988e97a/
Threat name:
Win32.Trojan.Guloader
Create hunting rule
Status:
Malicious
First seen:
2023-03-13 01:25:51 UTC
File Type:
PE (Exe)
Extracted files:
16
AV detection:
12 of 37 (32.43%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=vbzro6rndpabw7ztdvxdqlc3hdwk3y25rq326ns6uttddomi5f5a._file
Verdict:
unknown
Similar samples:
0faf5543b3fe80d01ba68547d5bf49813c8c93f9f942fdd46ecb684e47a93597
GuLoader
2c213f07c4fd57a1d8cebd5cc96e1756979c94c639012657f13e7e8e7c9bb55c
GuLoader
3d7428999a3bc90f003d9ea3673abc88c6d9988fc875d45c088dfe8f61fd3e0f
GuLoader
615e6c6d71b5e39a29970f555b48255519e5d7f9c956faa2f578f4c50365d046
GuLoader
7500744cb96ef00da3854791e50622a7c5c0e1cdcf0708c7a7755070509d90b5
GuLoader
98f3769bc2318575d1a8d3964c11a6d14b4be9aa380395f9dc3e368cbb465056
GuLoader
b75f0520f391edee50a5de8c5d0e65c544b8ed2da8323b42776fd0df788247d4
GuLoader
c3a1e3e128a54d44e9cc9d1e5d1e1628b7c20200aec86d0c06cb3fd719ec34f8
GuLoader
d6d829102bf6a3de1318d233cb20baad5c2e6608482923ff687a3be26d122b47
GuLoader
+ 648 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-lm7xvsbg4s/
Behaviour
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
outlook_office_path
outlook_win_path
Enumerates physical storage devices
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/f5647e6d-4687-4ef5-ad03-bf77609d65f0/
SH256 hash:
a873177a2d1bc01b7f331d6e382c5b38ecade35d8c37af365ea4e631b988e97a
MD5 hash:
3cbd2b8779df535e99e6dec86831a4ba
SHA1 hash:
64e6a8e4125ecd4c94b694a643e839f8567b86a0
Link:
https://www.unpac.me/results/f5647e6d-4687-4ef5-ad03-bf77609d65f0/
Malware family:
GuLoader
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/a873177a2d1b/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/a873177a2d1bc01b7f331d6e382c5b38ecade35d8c37af365ea4e631b988e97a

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/373951/

Comments