MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 2803a6af28d635b93ad31a5a9d129bc4a4e143700013b1d660041aa02ccfb799. 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: 2803a6af28d635b93ad31a5a9d129bc4a4e143700013b1d660041aa02ccfb799
SHA3-384 hash: 6cb8e5bf0ee8ac927b3e9160e7c589564f5d041672c6181353f52ae7f8ed033f135eae9e591c9328adc40eb8ca934001
SHA1 hash: d29b72f0bb0c7606844426ce7b087b9ce5593b80
MD5 hash: d05a21133aa5d08220b385965bf678d2
humanhash: friend-lima-alanine-beer
File name:FACTURA_081225.exe
Download: download sample
Signature GuLoader
Create hunting rule
File size:428'976 bytes
First seen:2025-12-09 11:49:48 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f4639a0b3116c2cfc71144b88a929cfd (115 x GuLoader, 54 x Formbook, 40 x VIPKeylogger)
ssdeep 12288:IXiR7PA9QWY+0dYHCbDqfZeFIWv5pWmoxUj+1QRTWRKGVRq7vrotF4oIOs:IXiR7PA9QWY+0dYHCbDqfZeFIWv5pWm3
Threatray 819 similar samples on MalwareBazaar
TLSH T1BC940244BB54D5C3DA934E304D73E232DAB4BD062E214A871744BF3F2EB3592EB09A59
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
dhash icon c24e8ce030488ea6 (9 x GuLoader, 3 x VIPKeylogger, 1 x MassLogger)
Reporter lowmal3
Tags:exe GuLoader

Intelligence

File Origin
# of uploads :
1
# of downloads :
165
Origin country :
DE DE
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/c23e0bb7-5f96-4240-b075-cc86e496fc9e/
Malware family:
n/a
ID:
1
File name:
_2803a6af28d635b93ad31a5a9d129bc4a4e143700013b1d660041aa02ccfb799.exe
Verdict:
Malicious activity
Analysis date:
2025-12-09 11:50:39 UTC
Tags:
snake keylogger evasion telegram stealer
Link:
https://app.any.run/tasks/c0540a30-6a9d-427b-877b-38ffc8b7a687

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/43975/
Verdict:
Malicious
Score:
70%
Link:
https://cyber-fortress.com/docs/result/index.php?id=69380d01db58e1a2c22bacb1
Tags:
injection obfusc
Result
Verdict:
Clean
Maliciousness:

Behaviour
Creating a window
Creating a file in the %temp% subdirectories
Searching for the window
DNS request
Verdict:
Unknown
Threat level:
  2.5/10
Confidence:
100%
Tags:
adaptive-context anti-debug blackhole installer installer installer-heuristic masquerade microsoft_visual_cc nsis overlay signed
Link:
https://www.filescan.io/uploads/69380cfa6019bc7a8f828a95/reports/b50c55b1-5f10-4100-ba3d-629ce139c7df/overview
Verdict:
Unknown
Link:
https://www.hybrid-analysis.com/sample/2803a6af28d635b93ad31a5a9d129bc4a4e143700013b1d660041aa02ccfb799
Verdict:
Malicious
File Type:
exe x32
First seen:
2025-12-08T09:08:00Z UTC
Last seen:
2025-12-11T05:39:00Z UTC
Hits:
~100
Detections:
Trojan-PSW.SnakeLogger.HTTP.C&C HEUR:Trojan.Win32.Kryptik.gen
Link:
https://opentip.kaspersky.com/2803a6af28d635b93ad31a5a9d129bc4a4e143700013b1d660041aa02ccfb799/results?tab=lookup
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/e5c4dd29-6cd9-462c-915c-1728a54eac09
Result
Threat name:
GuLoader
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
76 / 100
Link:
https://www.joesandbox.com/analysis/1829408
Signature
AI detected suspicious PE digital signature
Found direct / indirect Syscall (likely to bypass EDR)
Multi AV Scanner detection for submitted file
Switches to a custom stack to bypass stack traces
Tries to detect virtualization through RDTSC time measurements
Unusual module load detection (module proxying)
Yara detected GuLoader
Behaviour
Behavior Graph:
Download SVG
Score:
99%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/2803a6af28d635b93ad31a5a9d129bc4a4e143700013b1d660041aa02ccfb799
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/d05a21133aa5d08220b385965bf678d2
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/2803a6af28d635b93ad31a5a9d129bc4a4e143700013b1d660041aa02ccfb799/
Verdict:
Malicious
Threat:
Family.SNAKE
Link:
https://tip.neiki.dev/file/2803a6af28d635b93ad31a5a9d129bc4a4e143700013b1d660041aa02ccfb799
Threat name:
Win32.Trojan.Generic
Create hunting rule
Status:
Suspicious
First seen:
2025-12-09 04:26:38 UTC
AV detection:
4 of 24 (16.67%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=fab2nlzi2y23sowtdjnj2eu3yssocq3qaaj3dvtaaqnkalgpw6mq._file
Verdict:
malicious
Label(s):
cloudeye
Create hunting rule
Similar samples:
0159563d865827167aabbd08bb46d6e417824038c3da287d86e9685f09b4f503
GuLoader
1e7c3562b98d4904a9018f74babd13ba0b46ec24dc9304afa35603a8f3ff2ccc
GuLoader
c8663dea9db342499a125f2f00b74c8ee662c04d909a4176760c020acc9c2ee3
GuLoader
cbee023c5bf4429139e4890715b1364dfff7d55f3cc400b594274888d3b6122d
GuLoader
e6cddaa90f34e86f420cc29ab96b1ea12913dde07cc9fb3783092c8763f10d45
GuLoader
error
GuLoader
+ 809 additional samples on MalwareBazaar
Result
Malware family:
vipkeylogger
Create hunting rule
Score:
  10/10
Tags:
family:guloader family:vipkeylogger collection discovery downloader keylogger spyware stealer
Link:
https://tria.ge/reports/251209-nzqkfsd18d/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
outlook_office_path
outlook_win_path
Browser Information Discovery
Enumerates physical storage devices
System Location Discovery: System Language Discovery
Drops file in Windows directory
Suspicious use of NtCreateThreadExHideFromDebugger
Suspicious use of NtSetInformationThreadHideFromDebugger
Accesses Microsoft Outlook profiles
Legitimate hosting services abused for malware hosting/C2
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
Guloader family
Guloader,Cloudeye
VIPKeylogger
Vipkeylogger family
Verdict:
Suspicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/ce7c9973-bdd4-4f7e-b4c9-13b5fb20ec88
Unpacked files
SH256 hash:
2803a6af28d635b93ad31a5a9d129bc4a4e143700013b1d660041aa02ccfb799
MD5 hash:
d05a21133aa5d08220b385965bf678d2
SHA1 hash:
d29b72f0bb0c7606844426ce7b087b9ce5593b80
Link:
https://www.unpac.me/results/95bad7b2-9b1c-4806-80f0-ec27c50867d9/
SH256 hash:
23d618a0293c78ce00f7c6e6dd8b8923621da7dd1f63a070163ef4c0ec3033d6
MD5 hash:
192639861e3dc2dc5c08bb8f8c7260d5
SHA1 hash:
58d30e460609e22fa0098bc27d928b689ef9af78
Link:
https://www.unpac.me/results/95bad7b2-9b1c-4806-80f0-ec27c50867d9/
SH256 hash:
89a82c4849c21dfe765052681e1fad02d2d7b13c8b5075880c52423dca72a912
MD5 hash:
b7d61f3f56abf7b7ff0d4e7da3ad783d
SHA1 hash:
15ab5219c0e77fd9652bc62ff390b8e6846c8e3e
Link:
https://www.unpac.me/results/95bad7b2-9b1c-4806-80f0-ec27c50867d9/
Malware family:
GuLoader
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/2803a6af28d6/report/overview.html
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/2803a6af28d635b93ad31a5a9d129bc4a4e143700013b1d660041aa02ccfb799

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 2803a6af28d635b93ad31a5a9d129bc4a4e143700013b1d660041aa02ccfb799

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/43975/

Comments