MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 d61a40be88930788c91fe81e5bcb58d175d332ff64c5076e2896eab2f74ab4d5. 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


Intelligence 12 IOCs YARA 3 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: d61a40be88930788c91fe81e5bcb58d175d332ff64c5076e2896eab2f74ab4d5
SHA3-384 hash: e9b8841cb31d806945a02919410a2ffe60d15748c25a5f361786fb0e2d3f55574c4a5f480eb56a33b768e86acbea61cd
SHA1 hash: 8cb09bf123af75b2611f0dff84432d0422b37943
MD5 hash: 55d1fa02fe0fba43dfe1dca00a444f4d
humanhash: oranges-echo-oklahoma-edward
File name:Contract - 8001569.exe
Download: download sample
Signature GuLoader
Create hunting rule
File size:541'496 bytes
First seen:2023-11-25 15:11:52 UTC
Last seen:2023-11-25 16:17:06 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash 1f23f452093b5c1ff091a2f9fb4fa3e9 (282 x GuLoader, 37 x RemcosRAT, 27 x VIPKeylogger)
ssdeep 12288:gDzHGJ9vnPcQ+1Nnbs8jr9eTqvgfbfQcxDLiV:+6fvP0NhjlgfbfQcxD+V
TLSH T118B4120139A5CC3BCC564776C93486FA0DE9DE21CA6A858B33043F9F79737510A2EB69
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)
Reporter abuse_ch
Tags:exe GuLoader signed

Code Signing Certificate

Organisation:
Issuer:
Algorithm:sha256WithRSAEncryption
Valid from:2022-11-27T01:28:57Z
Valid to:2025-11-26T01:28:57Z
Serial number: 48bc71a529604e3bc2c93ebff0933bf4abf0a33e
Thumbprint Algorithm:SHA256
Thumbprint: 3fb02ee5a4fd385e847faa5d897064cec0a26233309e6cc6ce7241efb9fb2407
Source:This information was brought to you by ReversingLabs A1000 Malware Analysis Platform

Intelligence

File Origin
# of uploads :
2
# of downloads :
315
Origin country :
NL NL
Vendor Threat Intelligence
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/460149/
Detection(s):
SecuriteInfo.com.Trojan.GenericKD.70547220.31661.30522.UNOFFICIAL
Create hunting rule

Result
Verdict:
Suspicious
Maliciousness:

Behaviour
Creating a file in the %temp% directory
Creating a window
Creating a file
Searching for the window
Searching for the Windows task manager window
Creating a process from a recently created file
Launching a process
Gathering data
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
control installer lolbin overlay packed shell32
Link:
https://www.filescan.io/uploads/65620ec4380413dc0c1fb201/reports/d18c4f75-b08f-4ffa-a4c0-c3c97352ee24/overview
Verdict:
Malicious
Labled as:
Trojan.Generic
Link:
https://www.hybrid-analysis.com/sample/d61a40be88930788c91fe81e5bcb58d175d332ff64c5076e2896eab2f74ab4d5
Result
Verdict:
MALICIOUS
Details
Windows PE Executable
Found a Windows Portable Executable (PE) binary. Depending on context, the presence of a binary is suspicious or malicious.
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/9b3465b8-3ef9-49c6-a51d-0b6bf4a15ff8
Result
Threat name:
AgentTesla, GuLoader
Create hunting rule
Detection:
malicious
Classification:
spre.troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1347724
Signature
Antivirus detection for URL or domain
Found suspicious powershell code related to unpacking or dynamic code loading
Maps a DLL or memory area into another process
Multi AV Scanner detection for domain / URL
Multi AV Scanner detection for submitted file
Obfuscated command line found
Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines)
Sigma detected: MSBuild connects to smtp port
Suspicious powershell command line found
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)
Very long command line found
Writes to foreign memory regions
Yara detected AgentTesla
Yara detected AntiVM3
Yara detected GuLoader
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1347724 Sample: Contract_-_8001569.exe Startdate: 25/11/2023 Architecture: WINDOWS Score: 100 29 server1.sqsendy.shop 2->29 31 juicylucy.cl 2->31 33 2 other IPs or domains 2->33 45 Multi AV Scanner detection for domain / URL 2->45 47 Antivirus detection for URL or domain 2->47 49 Multi AV Scanner detection for submitted file 2->49 51 4 other signatures 2->51 9 Contract_-_8001569.exe 7 61 2->9         started        signatures3 process4 file5 25 C:\Users\user\...\Sodavandsflaskernes.Pro232, ASCII 9->25 dropped 27 C:\Users\user\AppData\Local\...\nsExec.dll, PE32 9->27 dropped 61 Suspicious powershell command line found 9->61 13 powershell.exe 12 9->13         started        signatures6 process7 signatures8 63 Suspicious powershell command line found 13->63 65 Obfuscated command line found 13->65 67 Very long command line found 13->67 69 Found suspicious powershell code related to unpacking or dynamic code loading 13->69 16 powershell.exe 14 13->16         started        19 conhost.exe 13->19         started        process9 signatures10 41 Writes to foreign memory regions 16->41 43 Maps a DLL or memory area into another process 16->43 21 MSBuild.exe 15 8 16->21         started        process11 dnsIp12 35 server1.sqsendy.shop 63.250.35.178, 49739, 587 NAMECHEAP-NETUS United States 21->35 37 api4.ipify.org 104.237.62.212, 443, 49738 WEBNXUS United States 21->37 39 juicylucy.cl 201.217.241.42, 443, 49737 PowerHostTelecomSPACL Chile 21->39 53 Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc) 21->53 55 Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines) 21->55 57 Tries to steal Mail credentials (via file / registry access) 21->57 59 Tries to harvest and steal browser information (history, passwords, etc) 21->59 signatures13
Score:
96%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/d61a40be88930788c91fe81e5bcb58d175d332ff64c5076e2896eab2f74ab4d5
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/d61a40be88930788c91fe81e5bcb58d175d332ff64c5076e2896eab2f74ab4d5/
Threat name:
Win32.Trojan.Guloader
Create hunting rule
Status:
Malicious
First seen:
2023-11-23 13:31:00 UTC
File Type:
PE (Exe)
Extracted files:
7
AV detection:
15 of 23 (65.22%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=2ynebpuismdyrsi75apfxs2y2f25gmx7mtcqo3ris3vlf52kwtkq._file
Verdict:
malicious
Label(s):
agenttesla_v4
Create hunting rule
Result
Malware family:
agenttesla
Create hunting rule
Score:
  10/10
Tags:
family:agenttesla keylogger spyware stealer trojan
Link:
https://tria.ge/reports/231125-sk6eksbg2t/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Program crash
Drops file in Windows directory
Suspicious use of NtCreateThreadExHideFromDebugger
Suspicious use of NtSetInformationThreadHideFromDebugger
Suspicious use of SetThreadContext
Looks up external IP address via web service
Loads dropped DLL
AgentTesla
Unpacked files
SH256 hash:
0096ae873c75f4e4d802dc97eec9893acc0749a7346e63f25a8d52ba8e11c527
MD5 hash:
35200be9cf105f3defe2ae0ee44cea12
SHA1 hash:
3f4a09eeb477d3f048cdfb848b95aa39b20d89dc
Link:
https://www.unpac.me/results/5ee1829a-db41-4107-a068-02807053f897/
SH256 hash:
c47679897928a8a1d8017a6ad9464c57e022c1e48f308d2a5c56a854a68be650
MD5 hash:
e5863272ea25171fda0749fcd923b8bf
SHA1 hash:
1879c9c33e7e3151bf677cef3e2db33f43850c08
Link:
https://www.unpac.me/results/5ee1829a-db41-4107-a068-02807053f897/
SH256 hash:
d61a40be88930788c91fe81e5bcb58d175d332ff64c5076e2896eab2f74ab4d5
MD5 hash:
55d1fa02fe0fba43dfe1dca00a444f4d
SHA1 hash:
8cb09bf123af75b2611f0dff84432d0422b37943
Link:
https://www.unpac.me/results/5ee1829a-db41-4107-a068-02807053f897/
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/d61a40be8893/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/d61a40be88930788c91fe81e5bcb58d175d332ff64c5076e2896eab2f74ab4d5

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:DebuggerCheck__API
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:PE_Digital_Certificate
Create hunting rule
Author:albertzsigovits
Rule name:QbotStuff
Create hunting rule
Author:anonymous

File information

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

Malspam

GuLoader

Executable exe d61a40be88930788c91fe81e5bcb58d175d332ff64c5076e2896eab2f74ab4d5

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/460149/

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