MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 c3a6aaba899b23d82c2a243053ddb261d41690d3a3fcd43804c0f5d384c60800. 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: 15


Intelligence 15 IOCs YARA 1 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: c3a6aaba899b23d82c2a243053ddb261d41690d3a3fcd43804c0f5d384c60800
SHA3-384 hash: b7e7bec28923f6d4e78d0d8d5ac0492865547ac0931336443b8816f99f41e5c060936fe2e3918f8527748cba10317632
SHA1 hash: 029877f4caa9c1d5dbf317f7d78f7326f011ee87
MD5 hash: 5bdcd1c5b498342fbbc03135a3daeb82
humanhash: nineteen-freddie-delta-oscar
File name:JUSTIF. PAGO.bat
Download: download sample
Signature GuLoader
Create hunting rule
File size:588'751 bytes
First seen:2025-10-06 09:29:50 UTC
Last seen:2025-10-06 10:40:00 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash b34f154ec913d2d2c435cbd644e91687 (533 x GuLoader, 110 x RemcosRAT, 80 x EpsilonStealer)
ssdeep 12288:csGS21Kv/oFWLAae7BjoUMRLF/ctN9FBLN8vOGpQtb:c7S21KoFW0PSFYN9LN8vOGpQtb
TLSH T1E6C4F162A690FE13C167457E65DA91D2AD67BD50FB63953B2B803B3FC8BE040860B307
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 adrian__luca
Tags:exe GuLoader

Intelligence

File Origin
# of uploads :
2
# of downloads :
107
Origin country :
HU HU
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
JUSTIF. PAGO.bat
Verdict:
Suspicious activity
Analysis date:
2025-10-06 09:48:00 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/16ce74c2-5e2f-4d3a-b4f0-78f5ba4ac13d

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/30753/
Detection(s):
SecuriteInfo.com.Trojan.Multi.Generic.4c.11520.UNOFFICIAL
Create hunting rule

Verdict:
Malicious
Score:
95.7%
Link:
https://cyber-fortress.com/docs/result/index.php?id=68e38cec91bc581176cc573b
Tags:
injection uloader virus nsis
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Searching for the window
Creating a file in the %AppData% subdirectories
Delayed reading of the file
Creating a file in the %temp% subdirectories
Sending a custom TCP request
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
adaptive-context anti-debug blackhole installer masquerade microsoft_visual_cc nsis overlay
Link:
https://www.filescan.io/uploads/68e38d233ec725b8760a1ddc/reports/21aedc7b-8f88-460a-b5b4-637ced8ed61b/overview
Verdict:
Malicious
Labled as:
Trojan.Generic
Link:
https://www.hybrid-analysis.com/sample/c3a6aaba899b23d82c2a243053ddb261d41690d3a3fcd43804c0f5d384c60800
Verdict:
Malicious
File Type:
exe x32
First seen:
2025-09-30T08:18:00Z UTC
Last seen:
2025-10-06T03:24:00Z UTC
Hits:
~100
Link:
https://opentip.kaspersky.com/c3a6aaba899b23d82c2a243053ddb261d41690d3a3fcd43804c0f5d384c60800/results?tab=lookup
Malware family:
Unlabeled
Create hunting rule
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/301cdb98-9c83-42fa-9087-f8ebd7cb0de0
Score:
99%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/c3a6aaba899b23d82c2a243053ddb261d41690d3a3fcd43804c0f5d384c60800
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/5bdcd1c5b498342fbbc03135a3daeb82
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/c3a6aaba899b23d82c2a243053ddb261d41690d3a3fcd43804c0f5d384c60800/
Verdict:
Malicious
Threat:
Trojan.Win32.GuLoader
Link:
https://tip.neiki.dev/file/c3a6aaba899b23d82c2a243053ddb261d41690d3a3fcd43804c0f5d384c60800
Threat name:
Win32.Trojan.Guloader
Create hunting rule
Status:
Malicious
First seen:
2025-09-30 14:01:55 UTC
File Type:
PE (Exe)
Extracted files:
8
AV detection:
23 of 38 (60.53%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=yotkvoujtmr5qlbkeqyfhxnsmhkbnegtup6nioaeyd25hbggbaaa._file
Result
Malware family:
n/a
Score:
  7/10
Tags:
discovery
Link:
https://tria.ge/reports/251006-ljwenahm7t/
Behaviour
Suspicious behavior: MapViewOfSection
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Program crash
System Location Discovery: System Language Discovery
Suspicious use of NtSetInformationThreadHideFromDebugger
Loads dropped DLL
Verdict:
Suspicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/1b83adce-6444-4b04-b797-8d3e37a2ee9e
Unpacked files
SH256 hash:
c3a6aaba899b23d82c2a243053ddb261d41690d3a3fcd43804c0f5d384c60800
MD5 hash:
5bdcd1c5b498342fbbc03135a3daeb82
SHA1 hash:
029877f4caa9c1d5dbf317f7d78f7326f011ee87
Link:
https://www.unpac.me/results/519865c8-efbe-4080-b53f-556f95a5b407/
SH256 hash:
1e40211af65923c2f4fd02ce021458a7745d28e2f383835e3015e96575632172
MD5 hash:
466179e1c8ee8a1ff5e4427dbb6c4a01
SHA1 hash:
eb607467009074278e4bd50c7eab400e95ae48f7
Link:
https://www.unpac.me/results/519865c8-efbe-4080-b53f-556f95a5b407/
SH256 hash:
3eb38ae99653a7dbc724132ee240f6e5c4af4bfe7c01d31d23faf373f9f2eaca
MD5 hash:
0d7ad4f45dc6f5aa87f606d0331c6901
SHA1 hash:
48df0911f0484cbe2a8cdd5362140b63c41ee457
Link:
https://www.unpac.me/results/519865c8-efbe-4080-b53f-556f95a5b407/
Malware family:
GuLoader
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/c3a6aaba899b/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

File information

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

Malspam

GuLoader

Executable exe c3a6aaba899b23d82c2a243053ddb261d41690d3a3fcd43804c0f5d384c60800

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/30753/

Comments