MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b5d44eb79bb60df60b30f4157e958cb1a84c6ed93f2fb3767e96c573c27092e4. 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 21 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: b5d44eb79bb60df60b30f4157e958cb1a84c6ed93f2fb3767e96c573c27092e4
SHA3-384 hash: 35ae5ccf8e2cfb5a1d3ca6cc1be804877b124d788ec857b3a9db58a03d96516863359a6f6c7fb2232b36ebd996be6220
SHA1 hash: 90cb9b25084358c628e1d7cca8b67f40815a9efd
MD5 hash: d08fed559e436d61713e63de037a44e9
humanhash: foxtrot-aspen-massachusetts-nevada
File name:11011425.exe
Download: download sample
Signature GuLoader
Create hunting rule
File size:1'167'728 bytes
First seen:2025-10-15 00:29:20 UTC
Last seen:2025-11-06 10:31:56 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash b34f154ec913d2d2c435cbd644e91687 (527 x GuLoader, 110 x RemcosRAT, 80 x EpsilonStealer)
ssdeep 24576:RBjs2wGweHRk6Mv/vf1stiD/GGd6Bp0xjs+9uI+wrUrFd2CCcI5HFElls/:9wGzPi/Vstiqqfsf1wiFddI5HFmW
Threatray 2'093 similar samples on MalwareBazaar
TLSH T15B4523566BD0C266D9728A31CE36C36FD7E5AC062066823763307E6DE9131829F6C27D
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 threatcat_ch
Tags:exe GuLoader signed

Code Signing Certificate

Organisation:Incendious
Issuer:Incendious
Algorithm:sha256WithRSAEncryption
Valid from:2025-08-25T23:56:11Z
Valid to:2026-08-25T23:56:11Z
Serial number: 5bf13e6db1b30aa48cfd2be833f61f24e5e01c52
Thumbprint Algorithm:SHA256
Thumbprint: bf0ff0cf777f6879eaaaef547152232fd31a895f6caf6695d7b8df07968ddfdf
Source:This information was brought to you by ReversingLabs A1000 Malware Analysis Platform

Intelligence

File Origin
# of uploads :
2
# of downloads :
211
Origin country :
CH CH
Vendor Threat Intelligence
Malware family:
remcos
Create hunting rule
ID:
1
File name:
11011425.exe
Verdict:
Malicious activity
Analysis date:
2025-10-15 00:31:08 UTC
Tags:
rat remcos remote evasion
Link:
https://app.any.run/tasks/e8326e72-fc4f-4b33-a1b1-62b5f3b8a7ea

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/32843/
Verdict:
Malicious
Score:
92.5%
Link:
https://cyber-fortress.com/docs/result/index.php?id=68eeeaf897a16d00a8da0580
Tags:
injection virus blic
Result
Verdict:
Clean
Maliciousness:

Behaviour
Creating a window
Creating a file in the %AppData% subdirectories
Creating a file in the %temp% directory
Searching for the window
Delayed reading of the file
Creating a file
Unauthorized injection to a recently created process
Restart of the analyzed sample
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
adaptive-context anti-debug blackhole guloader installer microsoft_visual_cc nsis overlay signed unsafe
Link:
https://www.filescan.io/uploads/68eeeb0571883144ef377a84/reports/a19947d7-0cb4-4d63-bb69-030d941ae7b0/overview
Verdict:
Malicious
Labled as:
Malware_56.1
Link:
https://www.hybrid-analysis.com/sample/b5d44eb79bb60df60b30f4157e958cb1a84c6ed93f2fb3767e96c573c27092e4
Verdict:
Malicious
File Type:
exe x32
First seen:
2025-10-14T18:02:00Z UTC
Last seen:
2025-10-16T22:32:00Z UTC
Hits:
~1000
Detections:
HEUR:Trojan-Downloader.Win32.Minix.gen Trojan-Dropper.Win32.Injector.sb Trojan-Downloader.Win32.Minix.sb Trojan.Win32.Guloader.sb Trojan.NSIS.Makoob.sba Backdoor.Win32.Remcos.sb PDM:Trojan.Win32.Generic
Link:
https://opentip.kaspersky.com/b5d44eb79bb60df60b30f4157e958cb1a84c6ed93f2fb3767e96c573c27092e4/results?tab=lookup
Verdict:
Suspicious
Link:
https://analyze.intezer.com/analyses/bded4a84-8609-47c9-85c5-15437b9624ad
Result
Threat name:
Remcos
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1795377
Signature
AI detected suspicious PE digital signature
C2 URLs / IPs found in malware configuration
Creates autostart registry keys with suspicious names
Detected Remcos RAT
Found malware configuration
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Sigma detected: Remcos
Switches to a custom stack to bypass stack traces
Tries to detect virtualization through RDTSC time measurements
Yara detected Remcos RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1795377 Sample: 11011425.exe Startdate: 15/10/2025 Architecture: WINDOWS Score: 100 46 drive.usercontent.google.com 2->46 48 drive.google.com 2->48 50 Found malware configuration 2->50 52 Multi AV Scanner detection for submitted file 2->52 54 Yara detected Remcos RAT 2->54 56 3 other signatures 2->56 9 11011425.exe 1 72 2->9         started        13 remcos.exe 28 2->13         started        15 remcos.exe 17 2->15         started        signatures3 process4 file5 36 C:\Users\user\AppData\Local\...\System.dll, PE32 9->36 dropped 68 Tries to detect virtualization through RDTSC time measurements 9->68 70 Switches to a custom stack to bypass stack traces 9->70 17 11011425.exe 2 10 9->17         started        38 C:\Users\user\AppData\Local\...\System.dll, PE32 13->38 dropped 22 remcos.exe 4 7 13->22         started        signatures6 process7 dnsIp8 40 drive.google.com 142.250.217.206, 443, 49719, 49724 GOOGLEUS United States 17->40 42 drive.usercontent.google.com 142.250.64.161, 443, 49721, 49725 GOOGLEUS United States 17->42 30 C:\ProgramData\Remcos\remcos.exe, PE32 17->30 dropped 32 C:\ProgramData\...\remcos.exe:Zone.Identifier, ASCII 17->32 dropped 58 Detected Remcos RAT 17->58 60 Creates autostart registry keys with suspicious names 17->60 24 remcos.exe 28 17->24         started        44 196.251.72.34, 2404 Web4AfricaZA Seychelles 22->44 file9 signatures10 process11 file12 34 C:\Users\user\AppData\Local\...\System.dll, PE32 24->34 dropped 62 Multi AV Scanner detection for dropped file 24->62 64 Tries to detect virtualization through RDTSC time measurements 24->64 66 Switches to a custom stack to bypass stack traces 24->66 28 remcos.exe 10 24->28         started        signatures13 process14
Score:
96%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/b5d44eb79bb60df60b30f4157e958cb1a84c6ed93f2fb3767e96c573c27092e4
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/d08fed559e436d61713e63de037a44e9
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/b5d44eb79bb60df60b30f4157e958cb1a84c6ed93f2fb3767e96c573c27092e4/
Threat name:
Win32.Trojan.GuLoader
Create hunting rule
Status:
Malicious
First seen:
2025-10-14 22:37:00 UTC
File Type:
PE (Exe)
Extracted files:
41
AV detection:
14 of 24 (58.33%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=wxke5n43wyg7mczq6qkx5fmmwguey3wzh4x3g5t6s3cxhqtqslsa._file
Verdict:
malicious
Label(s):
cloudeye
Create hunting rule
Similar samples:
31ad3cdc1ccc501f7d7ac1d15c4092e834fe9dd9f62d26c076cd4bf86ceeb444
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640568c2888a3c8e5736b78a02b6a09b81d7eea3f8a0bdfcb48492fc8c84a90d
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7489d07f2b921da4f4a31a17ab39613e699dcc367ca40c6edff64d43ac5bc11e
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8e6b8cff477fe728413cd3547e19399053b80007d8a22280ae806a43c90e3d39
GuLoader
966fae15977591dcc0cbb59722997dcc6093e56c4de02f5b20644c4dfe05d2ea
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c131ae97938e782d3beb56c4a00ca9ddad3812364c3f0492aacdb0458f659b1c
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c3a6aaba899b23d82c2a243053ddb261d41690d3a3fcd43804c0f5d384c60800
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c8ed881bc89a003b416e90a1ea6fc860c94167360c611e0f8bfbc8e768c357de
GuLoader
error
GuLoader
+ 2'083 additional samples on MalwareBazaar
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:guloader family:remcos collection discovery downloader persistence rat
Link:
https://tria.ge/reports/251015-as87bscy4c/
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
Suspicious use of NtCreateThreadExHideFromDebugger
Suspicious use of NtSetInformationThreadHideFromDebugger
Suspicious use of SetThreadContext
Accesses Microsoft Outlook accounts
Adds Run key to start application
Legitimate hosting services abused for malware hosting/C2
Looks up external IP address via web service
Checks computer location settings
Executes dropped EXE
Loads dropped DLL
Detected Nirsoft tools
NirSoft MailPassView
NirSoft WebBrowserPassView
Guloader family
Guloader,Cloudeye
Remcos
Remcos family
Malware Config
C2 Extraction:
196.251.72.34:2404
Verdict:
Suspicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/490d2cd9-ba51-45e9-b75e-db3badbde676
Unpacked files
SH256 hash:
b5d44eb79bb60df60b30f4157e958cb1a84c6ed93f2fb3767e96c573c27092e4
MD5 hash:
d08fed559e436d61713e63de037a44e9
SHA1 hash:
90cb9b25084358c628e1d7cca8b67f40815a9efd
Link:
https://www.unpac.me/results/b521ca3f-2d1d-4f6c-8994-015e2fd120f7/
SH256 hash:
1e40211af65923c2f4fd02ce021458a7745d28e2f383835e3015e96575632172
MD5 hash:
466179e1c8ee8a1ff5e4427dbb6c4a01
SHA1 hash:
eb607467009074278e4bd50c7eab400e95ae48f7
Link:
https://www.unpac.me/results/b521ca3f-2d1d-4f6c-8994-015e2fd120f7/
SH256 hash:
3eb38ae99653a7dbc724132ee240f6e5c4af4bfe7c01d31d23faf373f9f2eaca
MD5 hash:
0d7ad4f45dc6f5aa87f606d0331c6901
SHA1 hash:
48df0911f0484cbe2a8cdd5362140b63c41ee457
Link:
https://www.unpac.me/results/b521ca3f-2d1d-4f6c-8994-015e2fd120f7/
Malware family:
Remcos
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/b5d44eb79bb6/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/b5d44eb79bb60df60b30f4157e958cb1a84c6ed93f2fb3767e96c573c27092e4

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:cobalt_strike_tmp01925d3f
Create hunting rule
Author:The DFIR Report
Description:files - file ~tmp01925d3f.exe
Reference:https://thedfirreport.com
Rule name:CP_Script_Inject_Detector
Create hunting rule
Author:DiegoAnalytics
Description:Detects attempts to inject code into another process across PE, ELF, Mach-O binaries
Rule name:DebuggerCheck__API
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DetectEncryptedVariants
Create hunting rule
Author:Zinyth
Description:Detects 'encrypted' in ASCII, Unicode, base64, or hex-encoded
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:Disable_Defender
Create hunting rule
Author:iam-py-test
Description:Detect files disabling or modifying Windows Defender, Windows Firewall, or Microsoft Smartscreen
Rule name:FreddyBearDropper
Create hunting rule
Author:Dwarozh Hoshiar
Description:Freddy Bear Dropper is dropping a malware through base63 encoded powershell scrip.
Rule name:golang_bin_JCorn_CSC846
Create hunting rule
Author:Justin Cornwell
Description:CSC-846 Golang detection ruleset
Rule name:INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM
Create hunting rule
Author:ditekSHen
Description:Detects Windows exceutables bypassing UAC using CMSTP COM interfaces. MITRE (T1218.003)
Rule name:pe_detect_tls_callbacks
Create hunting rule
Rule name:PE_Digital_Certificate
Create hunting rule
Author:albertzsigovits
Rule name:Remcos
Create hunting rule
Author:kevoreilly
Description:Remcos Payload
Rule name:REMCOS_RAT_variants
Create hunting rule
Rule name:Remcos_unpacked_PulseIntel
Create hunting rule
Author:PulseIntel
Description:Remcos Payload
Rule name:Sus_CMD_Powershell_Usage
Create hunting rule
Author:XiAnzheng
Description:May Contain(Obfuscated or no) Powershell or CMD Command that can be abused by threat actor(can create FP)
Rule name:ThreadControl__Context
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:Windows_Trojan_Remcos_b296e965
Create hunting rule
Author:Elastic Security
Reference:https://www.elastic.co/security-labs/exploring-the-ref2731-intrusion-set
Rule name:win_remcos_auto
Create hunting rule
Author:Felix Bilstein - yara-signator at cocacoding dot com
Description:Detects win.remcos.
Rule name:win_remcos_rat_unpacked
Create hunting rule
Author:Matthew @ Embee_Research
Description:Detects strings present in remcos rat Samples.
Rule name:win_remcos_w0
Create hunting rule
Author:Matthew @ Embee_Research
Description:Detects strings present in remcos rat Samples.
Rule name:yarahub_win_remcos_rat_unpacked_aug_2023
Create hunting rule
Author:Matthew @ Embee_Research

File information

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

Malspam

GuLoader

Executable exe b5d44eb79bb60df60b30f4157e958cb1a84c6ed93f2fb3767e96c573c27092e4

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/32843/

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