MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 65b9d65a82e6197a80a9214334c81d373440e12f53feb6896399647666c22792. 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 2 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 65b9d65a82e6197a80a9214334c81d373440e12f53feb6896399647666c22792
SHA3-384 hash: 7feb40e0da54babfca621a2433f5d5ab0c247e36b213d6f850a3dd6cf2980722f0dbc465b682f53ded058d37dc7ab30b
SHA1 hash: a6ade575b1cd51af8a0e9c24ddb4f662fbabf8ed
MD5 hash: abcd81b466f04af41a2461d214cacc7c
humanhash: grey-nitrogen-cola-wolfram
File name:abcd81b466f04af41a2461d214cacc7c.exe
Download: download sample
Signature GuLoader
Create hunting rule
File size:358'128 bytes
First seen:2023-07-25 18:28:51 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash e2a592076b17ef8bfb48b7e03965a3fc (386 x GuLoader, 59 x RemcosRAT, 43 x VIPKeylogger)
ssdeep 6144:RpkXchFCzydDejPm6qVkRRkwSwshYw8uktKgJEwc+IxXzcg+Zw4fdJNorPWvuzAZ:A6SqAmVKSwSwshYFJLPmDLiwOdI0t
Threatray 878 similar samples on MalwareBazaar
TLSH T11A7423130784E56EEE178E726864A3F7EDF3E6254A3F671313196D463E83B42784E064
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 b2a89c96a2cada72 (2'283 x Formbook, 981 x Loki, 803 x AgentTesla)
Reporter abuse_ch
Tags:exe GuLoader signed

Code Signing Certificate

Organisation:
Issuer:
Algorithm:sha256WithRSAEncryption
Valid from:2023-07-06T23:58:11Z
Valid to:2026-07-05T23:58:11Z
Serial number: 46313fbc9a491b106e8cbe0d5f032f8f7ef0ee6f
Thumbprint Algorithm:SHA256
Thumbprint: 8fe1c1340784dabae2cbb357d933e5aa55c064e41818e1de6d97afe86c1306c6
Source:This information was brought to you by ReversingLabs A1000 Malware Analysis Platform

Intelligence

File Origin
# of uploads :
1
# of downloads :
264
Origin country :
NL NL
Vendor Threat Intelligence
Malware family:
guloader
Create hunting rule
ID:
1
File name:
abcd81b466f04af41a2461d214cacc7c.exe
Verdict:
Malicious activity
Analysis date:
2023-07-25 18:42:34 UTC
Tags:
guloader
Link:
https://app.any.run/tasks/b5825b6b-ed29-4857-9d7a-38a8e682f51d

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
Guloader
Create hunting rule
Link:
https://www.capesandbox.com/analysis/433062/
Detection(s):
SecuriteInfo.com.Trojan.NSIS.Agent.2554.28992.UNOFFICIAL
Create hunting rule

Result
Verdict:
Clean
Maliciousness:

Behaviour
Searching for the window
Creating a window
Creating a file
Creating a file in the %temp% subdirectories
Sending a custom TCP request
Delayed reading of the file
Gathering data
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
Link:
https://www.hybrid-analysis.com/sample/65b9d65a82e6197a80a9214334c81d373440e12f53feb6896399647666c22792
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:
Unknown
Link:
https://analyze.intezer.com/analyses/6442e550-3a37-4da0-806b-87550e125f90
Result
Threat name:
GuLoader, FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad.spyw
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1279487
Signature
Antivirus detection for URL or domain
Injects a PE file into a foreign processes
Malicious sample detected (through community Yara rule)
Maps a DLL or memory area into another process
Modifies the context of a thread in another process (thread injection)
Multi AV Scanner detection for submitted file
Performs DNS queries to domains with low reputation
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
Snort IDS alert for network traffic
System process connects to network (likely due to code injection or exploit)
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 steal Mail credentials (via file / registry access)
Writes to foreign memory regions
Yara detected FormBook
Yara detected GuLoader
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1279487 Sample: zdnMKdJfus.exe Startdate: 25/07/2023 Architecture: WINDOWS Score: 100 31 www.vevo-verify.com 2->31 33 www.thesimplifiedagency.com 2->33 35 17 other IPs or domains 2->35 45 Snort IDS alert for network traffic 2->45 47 Malicious sample detected (through community Yara rule) 2->47 49 Antivirus detection for URL or domain 2->49 51 5 other signatures 2->51 10 zdnMKdJfus.exe 6 27 2->10         started        signatures3 process4 file5 29 C:\Users\user\AppData\Local\...\System.dll, PE32 10->29 dropped 63 Tries to detect Any.run 10->63 14 zdnMKdJfus.exe 6 10->14         started        signatures6 process7 dnsIp8 43 194.59.218.151, 49980, 80 FASTWEBIT Netherlands 14->43 65 Modifies the context of a thread in another process (thread injection) 14->65 67 Tries to detect Any.run 14->67 69 Maps a DLL or memory area into another process 14->69 71 2 other signatures 14->71 18 RAVCpl64.exe 14->18 injected signatures9 process10 process11 20 rundll32.exe 13 18->20         started        signatures12 53 Tries to steal Mail credentials (via file / registry access) 20->53 55 Tries to harvest and steal browser information (history, passwords, etc) 20->55 57 Writes to foreign memory regions 20->57 59 3 other signatures 20->59 23 explorer.exe 5 1 20->23 injected 27 firefox.exe 20->27         started        process13 dnsIp14 37 gyoseisyoshi-jimusyo.com 219.94.128.69, 50017, 50018, 50019 SAKURA-CSAKURAInternetIncJP Japan 23->37 39 vevo-verify.com 142.44.226.116, 50006, 50007, 50008 OVHFR Canada 23->39 41 12 other IPs or domains 23->41 61 System process connects to network (likely due to code injection or exploit) 23->61 signatures15
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/65b9d65a82e6197a80a9214334c81d373440e12f53feb6896399647666c22792/
Threat name:
Win32.Trojan.Guloader
Create hunting rule
Status:
Suspicious
First seen:
2023-07-25 12:47:51 UTC
File Type:
PE (Exe)
Extracted files:
4
AV detection:
13 of 36 (36.11%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=mw45mwuc4ymxvafjefbtjsa5g42ebyjpkp7lncldtfshmzwce6ja._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
cloudeye
Create hunting rule
Similar samples:
40e40c04f4357fec11cb9037a802efbe582a4ac64e215909f2c7770475e5a252
GuLoader
512861c49503d13c3c1e7c1fff398054eae819195f839aafd803c853cd25143a
GuLoader
53bb0f293733cadbf6b5704cd0359b61acaa6367eb49268905714492d35ddf81
GuLoader
5cbfb7154648241fbec88e87e2ea973816c38ee892344bd742dfc4aeb044fae3
GuLoader
62ed901f438fc72b696fd6fafaa0d7fa8b1d5a6b96a281844effc456de3ada1f
GuLoader
95bffddb091c2b221f1395a4a4cf1dbf4a3ad29638a503b7cc85848a45198e06
GuLoader
b80d975ddd8e28bf201a5dd08cbfa50ef211aa5600f33b4c10e6d72068864f13
GuLoader
c5ae9a42b26b2a0c9b7ab0e75dc45ebb11c69276345a8e8dcd6367599569fbc5
GuLoader
c7616a546f8e22dd0a80b275f5991b6c6ab567d278be339904d6bff0c5c00a42
GuLoader
e4f9c1298c90f9ffbb03d200ffdad6dae09bd94e1a408a3ba6a1b671d567b2c1
GuLoader
+ 868 additional samples on MalwareBazaar
Result
Malware family:
guloader
Create hunting rule
Score:
  10/10
Tags:
family:guloader discovery downloader
Link:
https://tria.ge/reports/230725-w4w7ssfa93/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
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
Loads dropped DLL
Guloader,Cloudeye
Unpacked files
SH256 hash:
982c5fb7ada7d8c9bc3e419d1c35da6f05bc5dd845940c179af3a33d00a36a8b
MD5 hash:
0ff2d70cfdc8095ea99ca2dabbec3cd7
SHA1 hash:
10c51496d37cecd0e8a503a5a9bb2329d9b38116
Link:
https://www.unpac.me/results/216c9766-47bf-4280-a2fb-973bbe37ae9a/
SH256 hash:
65b9d65a82e6197a80a9214334c81d373440e12f53feb6896399647666c22792
MD5 hash:
abcd81b466f04af41a2461d214cacc7c
SHA1 hash:
a6ade575b1cd51af8a0e9c24ddb4f662fbabf8ed
Link:
https://www.unpac.me/results/216c9766-47bf-4280-a2fb-973bbe37ae9a/
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/65b9d65a82e6197a80a9214334c81d373440e12f53feb6896399647666c22792

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:PE_Digital_Certificate
Create hunting rule
Author:albertzsigovits
Rule name:PE_Potentially_Signed_Digital_Certificate
Create hunting rule
Author:albertzsigovits

File information

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

Web download

GuLoader

Executable exe 65b9d65a82e6197a80a9214334c81d373440e12f53feb6896399647666c22792

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/2686886/
  
Delivery method
Distributed via web download
Cape
Cape
https://www.capesandbox.com/analysis/433062/

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