MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 11f392975699cfc7bae3ec4a5cae53d0a16f182038416728b24813d0e78cf3bc. 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: 16


Intelligence 16 IOCs YARA 2 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 11f392975699cfc7bae3ec4a5cae53d0a16f182038416728b24813d0e78cf3bc
SHA3-384 hash: 59f11b2ac63e4a43f9a9242378daa0b23d83307f1f4f70105a7cc51b304c23fa17cbea30809830e345ebf9febeb56c80
SHA1 hash: ac45b48bb58fc7f7471c1e2bbd639727e1707e4d
MD5 hash: d0ed0abcf3fa360c725e0dbce00f96de
humanhash: cardinal-missouri-saturn-butter
File name:rdiciembre_2025.exe
Download: download sample
Signature GuLoader
Create hunting rule
File size:799'672 bytes
First seen:2025-12-10 21:00:08 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash b34f154ec913d2d2c435cbd644e91687 (548 x GuLoader, 117 x RemcosRAT, 80 x EpsilonStealer)
ssdeep 12288:pmdBoBJIEIoCoVbFPy1wlbtjHbKeOCa7JFBg9azzatENpZ9Z6r4st2vw:yBoTIEDr7Py1wPOQa7RgQz0+NZya4
Threatray 2'467 similar samples on MalwareBazaar
TLSH T10D051201BF24C11BC8729E300DE7D7A1A6B57E2C39959B0B73A8B71D2D762811E8D36D
TrID 47.3% (.EXE) Win32 Executable MS Visual C++ (generic) (31206/45/13)
15.9% (.EXE) Win64 Executable (generic) (10522/11/4)
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) (4504/4/1)
Magika pebin
Reporter FXOLabs
Tags:exe GuLoader signed

Code Signing Certificate

Organisation:Preterminal
Issuer:Preterminal
Algorithm:sha256WithRSAEncryption
Valid from:2025-10-27T08:47:18Z
Valid to:2026-10-27T08:47:18Z
Serial number: 2ff1f0df77953f0024508c348de18254cce1fb7c
Thumbprint Algorithm:SHA256
Thumbprint: 234914ec851cc3b9932b21f40480cff4113bb0f411e4c379b6ce017adc2f2bc6
Source:This information was brought to you by ReversingLabs A1000 Malware Analysis Platform

Intelligence

File Origin
# of uploads :
1
# of downloads :
123
Origin country :
BR BR
Vendor Threat Intelligence
Malware configuration found for:
GuLoader NSIS
Details
GuLoader
a c2 URL, a useragent string, and a string XOR key
GuLoader
an XOR decryption key and an extracted component
NSIS
extracted archive contents
Link:
https://research.acce.ciphertechsolutions.com/results/e98864ee-4577-44d9-9664-eaac9895d120/
Malware family:
n/a
ID:
1
File name:
_fe5fc9dc66a30fe5f3506749f0aa6ee7326e92dd16d84dca665b896241b6b19a.rar
Verdict:
No threats detected
Analysis date:
2025-12-10 20:34:51 UTC
Tags:
arch-exec
Link:
https://app.any.run/tasks/c6d33e92-d6a4-4bf6-a9f3-00d2ffc2438a

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/44231/
Verdict:
Malicious
Score:
90.2%
Link:
https://cyber-fortress.com/docs/result/index.php?id=6939d89fbde6a3e59710018a
Tags:
underscore injection virus blic
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
adaptive-context anti-debug blackhole installer installer installer-heuristic microsoft_visual_cc nsis overlay signed
Link:
https://www.filescan.io/uploads/6939df6a1eac7b9b76a4938c/reports/3cb639aa-d80d-435e-a443-8451272a0a56/overview
Verdict:
Malicious
Labled as:
Malware_52.5
Link:
https://www.hybrid-analysis.com/sample/11f392975699cfc7bae3ec4a5cae53d0a16f182038416728b24813d0e78cf3bc
Verdict:
Malicious
File Type:
exe x32
First seen:
2025-12-10T17:19:00Z UTC
Last seen:
2025-12-12T18:39:00Z UTC
Hits:
~1000
Detections:
Trojan.Win32.Guloader.sb Trojan.NSIS.Makoob.sba HEUR:Backdoor.Win32.Androm.gen Trojan-Downloader.Win32.Minix.sb
Link:
https://opentip.kaspersky.com/11f392975699cfc7bae3ec4a5cae53d0a16f182038416728b24813d0e78cf3bc/results?tab=lookup
Malware family:
Unlabeled
Create hunting rule
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/4d418fa4-0d20-4c8f-8b48-5e80c4a9d37a
Score:
92%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/11f392975699cfc7bae3ec4a5cae53d0a16f182038416728b24813d0e78cf3bc
Verdict:
inconclusive
YARA:
5 match(es)
Tags:
Executable NSIS Installer PE (Portable Executable) PE File Layout Win 32 Exe x86
Link:
https://app.malva.re/file/d0ed0abcf3fa360c725e0dbce00f96de
Detection:
agenttesla
Create hunting rule
Link:
https://mwdb.cert.pl/sample/11f392975699cfc7bae3ec4a5cae53d0a16f182038416728b24813d0e78cf3bc/
Threat name:
Win32.Trojan.Nekark
Create hunting rule
Status:
Malicious
First seen:
2025-12-10 21:00:29 UTC
File Type:
PE (Exe)
Extracted files:
34
AV detection:
13 of 24 (54.17%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=chzzff2wthh4poxd5rffzlst2cqw6gbahbawokfsjaj5bz4m6o6a._file
Verdict:
malicious
Label(s):
cloudeye
Create hunting rule
Similar samples:
0288db1418cf2c5f0be529a5e63c4f8b6c04c6be5a61fbc6dde28973cfb8428c
GuLoader
11f392975699cfc7bae3ec4a5cae53d0a16f182038416728b24813d0e78cf3bc
GuLoader
1393aeff54f1a1390b14afa4c3608f9f86145eba6c87d47ebd780e68405c4d40
GuLoader
190f1908e06f6168cbe53fd61cee79a3e2d565e6f1d78d5e3589eab360218c2b
GuLoader
523a09b4d2a3041cf4fa5de52aa73d3caa049147209faf3f3f854819d5ed5ffb
GuLoader
c3522c969c29c162a1b67b62b26510edfe67c8c163cbd9addea347dd229090af
GuLoader
d176fe5a5daf624834ecda3144e11ca2c3395de8cde5eed0263bb3caac597096
GuLoader
e4236b751a47d5b200cf57601fa4be5fde3478ec72bfc429c237b5e5c98fe728
GuLoader
ebfb90d20f7358d28ceefb93456a70047164127d5e0dcfa23b7f95e7ac9c1423
GuLoader
error
GuLoader
+ 2'457 additional samples on MalwareBazaar
Result
Malware family:
agenttesla
Create hunting rule
Score:
  10/10
Tags:
family:agenttesla discovery keylogger spyware stealer trojan
Link:
https://tria.ge/reports/251210-zths7sej8y/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
System Location Discovery: System Language Discovery
Drops file in Windows directory
Suspicious use of NtCreateThreadExHideFromDebugger
Suspicious use of NtSetInformationThreadHideFromDebugger
Looks up external IP address via web service
Loads dropped DLL
Reads user/profile data of local email clients
Reads user/profile data of web browsers
AgentTesla
Agenttesla family
Verdict:
Suspicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/44d218aa-561f-471c-970e-93448149a4a2
Unpacked files
SH256 hash:
11f392975699cfc7bae3ec4a5cae53d0a16f182038416728b24813d0e78cf3bc
MD5 hash:
d0ed0abcf3fa360c725e0dbce00f96de
SHA1 hash:
ac45b48bb58fc7f7471c1e2bbd639727e1707e4d
Link:
https://www.unpac.me/results/20966cbb-c61b-4005-b38f-ed38cd2a1385/
SH256 hash:
c2f405d7402f815d0c3fadd9a50f0bbbb1bab9aa38fe347823478a2587299448
MD5 hash:
9625d5b1754bc4ff29281d415d27a0fd
SHA1 hash:
80e85afc5cccd4c0a3775edbb90595a1a59f5ce0
Link:
https://www.unpac.me/results/20966cbb-c61b-4005-b38f-ed38cd2a1385/
Malware family:
GuLoader
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/11f392975699/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.

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:Detect_NSIS_Nullsoft_Installer
Create hunting rule
Author:Obscurity Labs LLC
Description:Detects NSIS installers by .ndata section + NSIS header string
Rule name:PE_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.

Malspam

GuLoader

Executable exe 11f392975699cfc7bae3ec4a5cae53d0a16f182038416728b24813d0e78cf3bc

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/44231/

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