MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 d899a46671c4d07c396298300fa8bccb84afef9953785cfb6caacd95b059543b. 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 4 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: d899a46671c4d07c396298300fa8bccb84afef9953785cfb6caacd95b059543b
SHA3-384 hash: 7c939d6b1dbf89fddd973e7ffc9c33ff615c856c934e4327f7e115938aa384b1ead6e8eb57a48931bba97ed9b82d5b3c
SHA1 hash: afa4213ad6ef298dc0e99e47eedb4749b662912a
MD5 hash: d9b1b50827d88268526294b0da5f08d6
humanhash: nevada-cat-speaker-blue
File name:PO2144R SITCVN.exe
Download: download sample
Signature GuLoader
Create hunting rule
File size:1'173'592 bytes
First seen:2025-10-15 12:59:27 UTC
Last seen:2025-11-06 10:34:39 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash b34f154ec913d2d2c435cbd644e91687 (527 x GuLoader, 110 x RemcosRAT, 80 x EpsilonStealer)
ssdeep 24576:mBb0J1+p220kBmVgyygoUq9tiP0sGGd6Bp0xjs+9uI+wrUrFd2CCcI5HFEllsE:4S+AVZq9tiP0rqfsf1wiFddI5HFmn
Threatray 2'111 similar samples on MalwareBazaar
TLSH T19A4523A5BB60C523C9B39B7A8E27C66E17D41D14224B132353707D5EFE271928F8827E
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 James_inthe_box
Tags:exe GuLoader signed

Code Signing Certificate

Organisation:Viljefasthedens
Issuer:Viljefasthedens
Algorithm:sha256WithRSAEncryption
Valid from:2025-10-02T02:44:50Z
Valid to:2026-10-02T02:44:50Z
Serial number: 5cfb35d6e9f95bd89bf0d762443af0c630b08a6b
Thumbprint Algorithm:SHA256
Thumbprint: f6836bb20527f2936c5bf52e9e18abac41165f2aa39dc8c5380bcac9dc4374ad
Source:This information was brought to you by ReversingLabs A1000 Malware Analysis Platform

Intelligence

File Origin
# of uploads :
2
# of downloads :
139
Origin country :
US US
Vendor Threat Intelligence
Malware family:
remcos
Create hunting rule
ID:
1
File name:
_d899a46671c4d07c396298300fa8bccb84afef9953785cfb6caacd95b059543b.exe
Verdict:
Malicious activity
Analysis date:
2025-10-15 13:00:18 UTC
Tags:
rat remcos
Link:
https://app.any.run/tasks/5cd5ea20-ed75-42dc-b932-502977ec0b7f

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/32931/
Verdict:
Malicious
Score:
70%
Link:
https://cyber-fortress.com/docs/result/index.php?id=68ef9ab604e22ce9acda68d4
Tags:
injection obfusc blic
Result
Verdict:
Malware
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
Sending a custom TCP request
Unauthorized injection to a recently created process
Restart of the analyzed sample
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
adaptive-context anti-debug blackhole installer microsoft_visual_cc nsis overlay phishing signed
Link:
https://www.filescan.io/uploads/68ef9ab9df5cb32bf1ee8301/reports/78932974-8def-452b-b7c2-d215924c20e1/overview
Verdict:
Unknown
Link:
https://www.hybrid-analysis.com/sample/d899a46671c4d07c396298300fa8bccb84afef9953785cfb6caacd95b059543b
Verdict:
Malicious
File Type:
exe x32
First seen:
2025-10-14T18:37:00Z UTC
Last seen:
2025-10-17T11:07:00Z UTC
Hits:
~1000
Detections:
VHO:Backdoor.Win32.Remcos.gen PDM:Trojan.Win32.Generic HEUR:Trojan-Downloader.Win32.Minix.gen Trojan-Downloader.Win32.Minix.sb Trojan.Win32.GuLoader.sb Trojan.Win32.Yakes Trojan.NSIS.Makoob.sba Backdoor.Win32.Remcos.e
Link:
https://opentip.kaspersky.com/d899a46671c4d07c396298300fa8bccb84afef9953785cfb6caacd95b059543b/results?tab=lookup
Verdict:
Suspicious
Link:
https://analyze.intezer.com/analyses/ec8618c0-80b7-4f98-b312-46af4933f9cf
Score:
96%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/d899a46671c4d07c396298300fa8bccb84afef9953785cfb6caacd95b059543b
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/d9b1b50827d88268526294b0da5f08d6
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/d899a46671c4d07c396298300fa8bccb84afef9953785cfb6caacd95b059543b/
Verdict:
Malicious
Threat:
Family.REMCOS
Link:
https://tip.neiki.dev/file/d899a46671c4d07c396298300fa8bccb84afef9953785cfb6caacd95b059543b
Threat name:
Win32.Trojan.Guloader
Create hunting rule
Status:
Malicious
First seen:
2025-10-14 23:25:46 UTC
File Type:
PE (Exe)
Extracted files:
41
AV detection:
15 of 24 (62.50%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=3cm2iztrytihyolctaya7kf4zock734zkn4fz63mvlgzlmczkq5q._file
Verdict:
malicious
Label(s):
cloudeye
Create hunting rule
Similar samples:
09a3119541471bb54bfe2bbb4cb18d86501deb8d6a0737ac659bf34e0b6a65d0
GuLoader
1ebfe856e8ae1d2162ce19814c8c7b2b06d572e1e3a12328ad7ba1cbed9f17ad
GuLoader
3997015d194d36fbfdf295ccfac536f72f39e2710777613eab05e5dd98a35ee8
GuLoader
3e2452ce469c3a38c595bf6c7b9f2c962aef7b6398aff2d4398195d28e7a8f3e
GuLoader
487d7ec49d8c5d8d53914ea9cced3aa35b77006271e5c3006c9cfa4ade6eb755
GuLoader
6c395098c834dc56befed790a3f47f542376b19d4bc10e34b23e315afe8108e9
GuLoader
6c4c09f6f9ed8e1d1d2d14c4680d57dee044886c77d7bb0c7426e80fa3fd47ec
GuLoader
abc25960c92c881ef69a94a3d8a96faacfdf0619327332509227c3cadc5f13b0
GuLoader
b1458b43d78afd118a7853e1985e9e2ad6b147af13d5100b786d20497ebd9a60
GuLoader
e837ce85c10c216e724d02358e910fa27e6b1c93dff8e51ed71e54e1970c58ce
GuLoader
error
GuLoader
+ 2'101 additional samples on MalwareBazaar
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:guloader family:remcos collection discovery downloader rat
Link:
https://tria.ge/reports/251015-p8by4ahz2g/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
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
Legitimate hosting services abused for malware hosting/C2
Looks up external IP address via web service
Loads dropped DLL
Detected Nirsoft tools
NirSoft MailPassView
NirSoft WebBrowserPassView
Guloader family
Guloader,Cloudeye
Remcos
Remcos family
Malware Config
C2 Extraction:
161.248.178.253:2404
Verdict:
Suspicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/524c3950-fb60-442f-b19f-f9396412ffe5
Unpacked files
SH256 hash:
d899a46671c4d07c396298300fa8bccb84afef9953785cfb6caacd95b059543b
MD5 hash:
d9b1b50827d88268526294b0da5f08d6
SHA1 hash:
afa4213ad6ef298dc0e99e47eedb4749b662912a
Link:
https://www.unpac.me/results/6993d6d5-c613-4c7c-a840-7a9d60a7ef94/
SH256 hash:
1e40211af65923c2f4fd02ce021458a7745d28e2f383835e3015e96575632172
MD5 hash:
466179e1c8ee8a1ff5e4427dbb6c4a01
SHA1 hash:
eb607467009074278e4bd50c7eab400e95ae48f7
Link:
https://www.unpac.me/results/6993d6d5-c613-4c7c-a840-7a9d60a7ef94/
SH256 hash:
3eb38ae99653a7dbc724132ee240f6e5c4af4bfe7c01d31d23faf373f9f2eaca
MD5 hash:
0d7ad4f45dc6f5aa87f606d0331c6901
SHA1 hash:
48df0911f0484cbe2a8cdd5362140b63c41ee457
Link:
https://www.unpac.me/results/6993d6d5-c613-4c7c-a840-7a9d60a7ef94/
Malware family:
Remcos
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/d899a46671c4/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/d899a46671c4d07c396298300fa8bccb84afef9953785cfb6caacd95b059543b

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_detect_tls_callbacks
Create hunting rule
Rule name:PE_Digital_Certificate
Create hunting rule
Author:albertzsigovits
Rule name:pe_no_import_table
Create hunting rule
Description:Detect pe file that no import table

File information

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

Cape
Cape
https://www.capesandbox.com/analysis/32931/

Comments