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MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 bb009e0d5d8fcb16bfa5bbc284bdcf507ae3383d5d66d6304fc9311087c34082. 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: 14


Intelligence 14 IOCs YARA 4 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: bb009e0d5d8fcb16bfa5bbc284bdcf507ae3383d5d66d6304fc9311087c34082
SHA3-384 hash: fdc2aa733e6d37f75a420e2245e3310ef1dbcfccae85ba7f1d3529780e97f263e475a2fa6037fb6f175072a89528f794
SHA1 hash: 9d48a24d3227ab906b1951b0780d959d76cb428f
MD5 hash: c453492c4210d4f932fc73e9d16c232b
humanhash: coffee-sierra-failed-carolina
File name:120548.exe
Download: download sample
Signature GuLoader
Create hunting rule
File size:867'936 bytes
First seen:2025-12-05 08:47:36 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash b78ecf47c0a3e24a6f4af114e2d1f5de (310 x GuLoader, 23 x Formbook, 21 x RemcosRAT)
ssdeep 24576:cFA7BZvzIL0vzmtoXpbTlhd3LvB16vgjBLoa:cA9ZvJCqxLvBc0BLoa
TLSH T11505F1FB3A418768C8E207F0D922D3A0D163FDD6D5E5D383165AFE79193248A82C5ED1
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 7eb030b0f8706a66 (2 x GuLoader)
Reporter threatcat_ch
Tags:exe GuLoader signed

Code Signing Certificate

Organisation:Variationsbredders
Issuer:Variationsbredders
Algorithm:sha256WithRSAEncryption
Valid from:2025-11-18T03:05:41Z
Valid to:2026-11-18T03:05:41Z
Serial number: 9a0450bfc41559f0f7da24c016659e5c380520
Thumbprint Algorithm:SHA256
Thumbprint: cbf73190bb50302514593bb31ffb4ab1fb941a18c11b75633cf5372507505798
Source:This information was brought to you by ReversingLabs A1000 Malware Analysis Platform

Intelligence

File Origin
# of uploads :
1
# of downloads :
136
Origin country :
CH CH
Vendor Threat Intelligence
Malware configuration found for:
NSIS
Details
Link:
https://research.acce.ciphertechsolutions.com/results/1da37505-48c5-4bb3-8a8f-c6e65f740bdb/
Malware family:
remcos
Create hunting rule
ID:
1
File name:
38dee432e4a83a74a0f1fa902a9ad8732b5dfe70b4fcb3e1f556ffb90dfac1e9.zip
Verdict:
Malicious activity
Analysis date:
2025-12-05 08:34:11 UTC
Tags:
arch-exec rat remcos auto-reg
Link:
https://app.any.run/tasks/9aabed98-3cd1-4925-980d-db8f7fef21a8

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/42624/
Detection(s):
SecuriteInfo.com.Trojan.DownLoad4.12041.10.UNOFFICIAL
Create hunting rule

Verdict:
Malicious
Score:
96.5%
Link:
https://cyber-fortress.com/docs/result/index.php?id=693299038724be026fec04eb
Tags:
remcos nsis
Verdict:
Unknown
Threat level:
  2.5/10
Confidence:
100%
Tags:
adaptive-context anti-debug installer installer installer-heuristic microsoft_visual_cc nsis overlay signed
Link:
https://www.filescan.io/uploads/69329c4fff25e40750d48425/reports/20289856-6512-48c3-a28f-2cb57b101d36/overview
Verdict:
Malicious
Labled as:
Injector.VSBB
Link:
https://www.hybrid-analysis.com/sample/bb009e0d5d8fcb16bfa5bbc284bdcf507ae3383d5d66d6304fc9311087c34082
Verdict:
Malicious
File Type:
exe x32
First seen:
2025-12-05T03:42:00Z UTC
Last seen:
2025-12-07T07:10:00Z UTC
Hits:
~1000
Detections:
Trojan.NSIS.Makoob.sbb Trojan.NSIS.Makoob.sba Trojan-Downloader.Win32.Minix.sb HEUR:Backdoor.Win32.Remcos.gen Trojan.NSIS.Makoob.sbd Trojan.NSIS.Makoob.sbc
Link:
https://opentip.kaspersky.com/bb009e0d5d8fcb16bfa5bbc284bdcf507ae3383d5d66d6304fc9311087c34082/results?tab=lookup
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/e61d8de0-4a78-4cba-b892-1e1514356ae4
Result
Threat name:
GuLoader
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
76 / 100
Link:
https://www.joesandbox.com/analysis/1827077
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:
93%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/bb009e0d5d8fcb16bfa5bbc284bdcf507ae3383d5d66d6304fc9311087c34082
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/c453492c4210d4f932fc73e9d16c232b
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/bb009e0d5d8fcb16bfa5bbc284bdcf507ae3383d5d66d6304fc9311087c34082/
Threat name:
Win32.Trojan.Guloader
Create hunting rule
Status:
Suspicious
First seen:
2025-12-05 08:34:13 UTC
File Type:
PE (Exe)
Extracted files:
27
AV detection:
15 of 38 (39.47%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=xmaj4dk5r7frnp5fxpbijpopkb5ogob5lvtnmmcpzeyrbb6dicba._file
Result
Malware family:
n/a
Score:
  7/10
Tags:
discovery installer
Link:
https://tria.ge/reports/251205-kqjtrsxjfy/
Behaviour
Suspicious behavior: MapViewOfSection
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
System Location Discovery: System Language Discovery
Drops file in Program Files directory
Drops file in Windows directory
Suspicious use of NtSetInformationThreadHideFromDebugger
Legitimate hosting services abused for malware hosting/C2
Loads dropped DLL
Verdict:
Suspicious
Tags:
loader guloader
YARA:
NSIS_GuLoader_July_2024
Link:
https://app.threat.zone/submission/ba4a8b07-5851-47e5-bbe4-c39202263373
Unpacked files
SH256 hash:
bb009e0d5d8fcb16bfa5bbc284bdcf507ae3383d5d66d6304fc9311087c34082
MD5 hash:
c453492c4210d4f932fc73e9d16c232b
SHA1 hash:
9d48a24d3227ab906b1951b0780d959d76cb428f
Link:
https://www.unpac.me/results/fd26474e-1a04-41cf-b7ec-3006f947c75d/
SH256 hash:
681382f3134de5c6272a49dd13651c8c201b89c247b471191496e7335702fa59
MD5 hash:
2ae993a2ffec0c137eb51c8832691bcb
SHA1 hash:
98e0b37b7c14890f8a599f35678af5e9435906e1
Link:
https://www.unpac.me/results/fd26474e-1a04-41cf-b7ec-3006f947c75d/
SH256 hash:
cb958e21c3935ef7697a2f14d64cae0f9264c91a92d2deeb821ba58852dac911
MD5 hash:
13b6a88cf284d0f45619e76191e2b995
SHA1 hash:
09ebb0eb4b1dca73d354368414906fc5ad667e06
Link:
https://www.unpac.me/results/fd26474e-1a04-41cf-b7ec-3006f947c75d/
Malware family:
Remcos
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/bb009e0d5d8f/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Suspicious File
Score:
0.52
Link:
https://yomi.yoroi.company/submissions/bb009e0d5d8fcb16bfa5bbc284bdcf507ae3383d5d66d6304fc9311087c34082

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_SliverFox_String
Create hunting rule
Author:huoji
Description:Detect files is `SliverFox` malware
Rule name:FreddyBearDropper
Create hunting rule
Author:Dwarozh Hoshiar
Description:Freddy Bear Dropper is dropping a malware through base63 encoded powershell scrip.
Rule name:Ins_NSIS_Buer_Nov_2020_1
Create hunting rule
Author:Arkbird_SOLG
Description:Detect NSIS installer used for Buer loader
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 bb009e0d5d8fcb16bfa5bbc284bdcf507ae3383d5d66d6304fc9311087c34082

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/42624/

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