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MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b20a621d134dc2725fc2390d02310b63b0fdbdca1000a1f45233257ff3f0709c. 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: b20a621d134dc2725fc2390d02310b63b0fdbdca1000a1f45233257ff3f0709c
SHA3-384 hash: 570eda5960db348f629885ac66e145fd5bbf7d627b65175e39e7a1247bdcfbbf092d885f2902094afeb5052b9196971c
SHA1 hash: eb7ca1b54ae544033bbd909bfcc4d886a7678adc
MD5 hash: 5cb96f0c017f854237211bda81de0709
humanhash: cold-west-magazine-steak
File name:b20a621d134dc2725fc2390d02310b63b0fdbdca1000a1f45233257ff3f0709c
Download: download sample
Signature GuLoader
Create hunting rule
File size:263'152 bytes
First seen:2026-03-06 14:49:15 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash b34f154ec913d2d2c435cbd644e91687 (594 x GuLoader, 131 x RemcosRAT, 86 x EpsilonStealer)
ssdeep 6144:KQ606x/yo7PJkPt8JfZeP53E1e4t4wG3QN2bmxwPC5fLsewO:wrJkPt8JfZsSe4RkD2wPyfx
TLSH T1A944CF613BD4D806DAB6C572D2B3FD39E673DD290A324A02A7F57F6C3836650581B30A
TrID 50.3% (.EXE) Win32 Executable MS Visual C++ (generic) (31206/45/13)
10.6% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
10.5% (.EXE) Win64 Executable (generic) (6522/11/2)
8.1% (.EXE) Win16 NE executable (generic) (5038/12/1)
7.2% (.EXE) Win32 Executable (generic) (4504/4/1)
Magika pebin
dhash icon 79fcfadefef2f070 (1 x GuLoader)
Reporter adrian__luca
Tags:exe GuLoader signed

Code Signing Certificate

Organisation:Macromere
Issuer:Macromere
Algorithm:sha256WithRSAEncryption
Valid from:2026-01-16T09:05:33Z
Valid to:2027-01-16T09:05:33Z
Serial number: 53d5afc14e719a033f151f10dd4b340b83311120
Thumbprint Algorithm:SHA256
Thumbprint: fe46e5db601767f001aacfcfc3fc803eeee3e2d3530023eaf87cbb61f1a66331
Source:This information was brought to you by ReversingLabs A1000 Malware Analysis Platform

Intelligence

File Origin
# of uploads :
1
# of downloads :
120
Origin country :
HU HU
Vendor Threat Intelligence
Details
Link:
https://research.acce.ciphertechsolutions.com/results/8e41d171-df7f-4709-95b3-726567315a01/
Malware family:
remcos
Create hunting rule
ID:
1
File name:
17022026_1516_16022026_AWBNo_9G8858-AWBNo_9B009177-HAWBNo_9G88559.gz
Verdict:
Malicious activity
Analysis date:
2026-02-17 15:22:21 UTC
Tags:
arch-exec remcos rat
Link:
https://app.any.run/tasks/5fcb0326-4e1b-43d4-9c2b-33f14edbe976

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/55988/
Detection(s):
SecuriteInfo.com.Malware-Cryptor.NSISex.Heur.13106.32189.UNOFFICIAL
Create hunting rule

Verdict:
Malicious
Score:
92.5%
Link:
https://cyber-fortress.com/docs/result/index.php?id=6992e05b0d0369ff9979daf8
Tags:
injection obfusc virus
Verdict:
Malicious
Labled as:
Malware_51.9
Link:
https://www.hybrid-analysis.com/sample/b20a621d134dc2725fc2390d02310b63b0fdbdca1000a1f45233257ff3f0709c
Verdict:
Malicious
File Type:
exe x32
Link:
https://opentip.kaspersky.com/b20a621d134dc2725fc2390d02310b63b0fdbdca1000a1f45233257ff3f0709c/results?tab=lookup
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/a26f8d21-80d2-4029-9499-b65c30656792
Result
Threat name:
Remcos, GuLoader
Create hunting rule
Detection:
malicious
Classification:
phis.troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1869854
Signature
AI detected suspicious PE digital signature
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
Detected Remcos RAT
Disable UAC(promptonsecuredesktop)
Found direct / indirect Syscall (likely to bypass EDR)
Found hidden mapped module (file has been removed from disk)
Installs a global keyboard hook
Joe Sandbox ML detected suspicious sample
Maps a DLL or memory area into another process
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Sigma detected: Remcos
Suricata IDS alerts for network traffic
Switches to a custom stack to bypass stack traces
Tries to detect virtualization through RDTSC time measurements
Tries to harvest and steal browser information (history, passwords, etc)
Tries to steal Instant Messenger accounts or passwords
Tries to steal Mail credentials (via file / registry access)
Tries to steal Mail credentials (via file registry)
Unusual module load detection (module proxying)
Writes to foreign memory regions
Yara detected GuLoader
Yara detected Remcos RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1869854 Sample: AWB No_9G8858, AWB No_9B009... Startdate: 16/02/2026 Architecture: WINDOWS Score: 100 38 drive.usercontent.google.com 2->38 40 drive.google.com 2->40 48 Suricata IDS alerts for network traffic 2->48 50 Antivirus detection for dropped file 2->50 52 Antivirus / Scanner detection for submitted sample 2->52 54 11 other signatures 2->54 8 AWB No_9G8858, AWB No_9B009177, HAWB No_ 9G88559.exe 1 28 2->8         started        signatures3 process4 file5 28 C:\Users\user\AppData\Local\...\System.dll, PE32 8->28 dropped 66 Found direct / indirect Syscall (likely to bypass EDR) 8->66 12 AWB No_9G8858, AWB No_9B009177, HAWB No_ 9G88559.exe 4 11 8->12         started        17 AWB No_9G8858, AWB No_9B009177, HAWB No_ 9G88559.exe 8->17         started        signatures6 process7 dnsIp8 42 198.46.173.31, 2404, 49695, 49696 AS-COLOCROSSINGUS United States 12->42 44 drive.google.com 142.250.190.142, 443, 49693 GOOGLEUS United States 12->44 46 drive.usercontent.google.com 142.250.190.97, 443, 49694 GOOGLEUS United States 12->46 30 C:\Users\user\AppData\Local\Temp\TH4EA5.tmp, MS-DOS 12->30 dropped 32 C:\Users\user\AppData\Local\Temp\TH4E75.tmp, MS-DOS 12->32 dropped 34 C:\Users\user\AppData\Local\Temp\TH4E55.tmp, MS-DOS 12->34 dropped 36 C:\ProgramData\remcos\logs.dat, data 12->36 dropped 68 Detected Remcos RAT 12->68 70 Writes to foreign memory regions 12->70 72 Maps a DLL or memory area into another process 12->72 74 3 other signatures 12->74 19 RmClient.exe 2 12->19         started        22 RmClient.exe 1 12->22         started        24 RmClient.exe 1 12->24         started        26 2 other processes 12->26 file9 signatures10 process11 signatures12 56 Tries to steal Mail credentials (via file registry) 19->56 58 Tries to harvest and steal browser information (history, passwords, etc) 19->58 60 Unusual module load detection (module proxying) 19->60 62 Tries to steal Instant Messenger accounts or passwords 22->62 64 Tries to steal Mail credentials (via file / registry access) 22->64
Score:
87%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/b20a621d134dc2725fc2390d02310b63b0fdbdca1000a1f45233257ff3f0709c
Gathering data
Detection:
remcos
Create hunting rule
Link:
https://mwdb.cert.pl/sample/b20a621d134dc2725fc2390d02310b63b0fdbdca1000a1f45233257ff3f0709c/
Verdict:
Malicious
Threat:
Family.REMCOS
Link:
https://tip.neiki.dev/file/b20a621d134dc2725fc2390d02310b63b0fdbdca1000a1f45233257ff3f0709c
Threat name:
Win32.Trojan.Generic
Create hunting rule
Status:
Suspicious
First seen:
2026-02-16 05:41:17 UTC
File Type:
PE (Exe)
Extracted files:
7
AV detection:
14 of 24 (58.33%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=wifgehitjxbhex6chegqemilmoyp3pokcaakd5csgmsx747qocoa._file
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:guloader family:remcos botnet:remotehost discovery downloader rat
Link:
https://tria.ge/reports/260306-r68ldsgy3q/
Behaviour
Suspicious behavior: MapViewOfSection
Suspicious use of SetWindowsHookEx
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 NtCreateThreadExHideFromDebugger
Suspicious use of NtSetInformationThreadHideFromDebugger
Contacts third-party web service commonly abused for C2
Loads dropped DLL
Guloader family
Guloader,Cloudeye
Remcos
Remcos family
Malware Config
C2 Extraction:
198.46.173.31:2404
Unpacked files
SH256 hash:
b20a621d134dc2725fc2390d02310b63b0fdbdca1000a1f45233257ff3f0709c
MD5 hash:
5cb96f0c017f854237211bda81de0709
SHA1 hash:
eb7ca1b54ae544033bbd909bfcc4d886a7678adc
Link:
https://www.unpac.me/results/a490af7c-f1b2-44d9-a89b-01181d76f956/
SH256 hash:
c2f405d7402f815d0c3fadd9a50f0bbbb1bab9aa38fe347823478a2587299448
MD5 hash:
9625d5b1754bc4ff29281d415d27a0fd
SHA1 hash:
80e85afc5cccd4c0a3775edbb90595a1a59f5ce0
Link:
https://www.unpac.me/results/a490af7c-f1b2-44d9-a89b-01181d76f956/
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/b20a621d134dc2725fc2390d02310b63b0fdbdca1000a1f45233257ff3f0709c

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.

Cape
Cape
https://www.capesandbox.com/analysis/55988/

Comments