MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 90bb3c411fffd0b0969cf9358658963c41ddc3b43ed7b957dad79db58d29e7e6. 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


MaskGramStealer


Vendor detections: 16


Intelligence 16 IOCs YARA 21 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 90bb3c411fffd0b0969cf9358658963c41ddc3b43ed7b957dad79db58d29e7e6
SHA3-384 hash: 3e934fefe6fb85d86e60b22a0ec8696192a605e62ac917f0dbb27d1f339d0435874656fe2705d368887ee7076a1d5ffa
SHA1 hash: 233d14b5d6c20637acc4197865da9ad14ba8c7d0
MD5 hash: b16e96fcc4c356f921942a10dbb9de3e
humanhash: summer-potato-vermont-magnesium
File name:file
Download: download sample
Signature MaskGramStealer
Create hunting rule
File size:2'383'360 bytes
First seen:2025-11-28 08:42:59 UTC
Last seen:2025-11-28 08:44:28 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash d42595b695fc008ef2c56aabd8efd68e (92 x Rhadamanthys, 91 x Vidar, 43 x LummaStealer)
ssdeep 24576:PZnAFEM3uYD5NDdGGd8qIPVRnCUgjtYVfSxtj34xGmcoeleTNj4HGu2U+cVTFPd:PZnez3XbDMGmlHngjqVA3uUm8
Threatray 1'778 similar samples on MalwareBazaar
TLSH T14DB56B0BFCA15CFAC0A9A23188765186BB61BC451F3123D72E90B7B82F72BD05D79B54
TrID 44.4% (.EXE) Win64 Executable (generic) (10522/11/4)
21.3% (.EXE) Win16 NE executable (generic) (5038/12/1)
8.7% (.ICL) Windows Icons Library (generic) (2059/9)
8.5% (.EXE) OS/2 Executable (generic) (2029/13)
8.4% (.EXE) Generic Win/DOS Executable (2002/3)
Magika pebin
Reporter Bitsight
Tags:dropped-by-amadey exe fbf543 MaskGramStealer


Avatar
Bitsight
url: http://178.16.55.189/files/371836541/xsR6v8s.exe

Intelligence

File Origin
# of uploads :
2
# of downloads :
108
Origin country :
US US
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
file
Verdict:
Malicious activity
Analysis date:
2025-11-28 08:43:44 UTC
Tags:
stealer golang
Link:
https://app.any.run/tasks/0b2f5b02-546c-48b0-8ce7-db869d21d56f

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/41704/
Detection(s):
Win.Malware.Wingo-10058333-0
Create hunting rule

Verdict:
Malicious
Score:
94.9%
Link:
https://cyber-fortress.com/docs/result/index.php?id=692960a66657e3433281c282
Tags:
malware
Result
Verdict:
Malware
Maliciousness:

Behaviour
DNS request
Connection attempt
Sending a custom TCP request
Behavior that indicates a threat
Connection attempt to an infection source
Query of malicious DNS domain
Sending a TCP request to an infection source
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
anti-vm base64 crypto golang
Link:
https://www.filescan.io/uploads/692960a2c7541436d9c194a8/reports/aae9a164-46b4-405e-983d-54469477a89a/overview
Verdict:
Malicious
Labled as:
WinGo/ShellcodeRunner.UG trojan
Link:
https://www.hybrid-analysis.com/sample/90bb3c411fffd0b0969cf9358658963c41ddc3b43ed7b957dad79db58d29e7e6
Verdict:
Malicious
File Type:
exe x64
First seen:
2025-11-28T06:15:00Z UTC
Last seen:
2025-11-28T06:32:00Z UTC
Hits:
~100
Detections:
Trojan-PSW.Vidar.HTTP.C&C Trojan.Win64.DonutInjector.sb Trojan.Win64.Donut.sb Trojan.Win64.Agentb.sb Trojan.Win32.Shellcode.sb Trojan.Win32.Shellcode.itz PDM:Trojan.Win32.Generic
Link:
https://opentip.kaspersky.com/90bb3c411fffd0b0969cf9358658963c41ddc3b43ed7b957dad79db58d29e7e6/results?tab=lookup
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/7e8dfce0-2aac-4b18-b81b-11220e157d43
Result
Threat name:
DonutLoader, MaskGram Stealer
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1822089
Signature
Antivirus detection for URL or domain
Found direct / indirect Syscall (likely to bypass EDR)
Found many strings related to Crypto-Wallets (likely being stolen)
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for submitted file
Switches to a custom stack to bypass stack traces
Tries to harvest and steal browser information (history, passwords, etc)
Tries to steal Crypto Currency Wallets
Unusual module load detection (module proxying)
Yara detected DonutLoader
Yara detected MaskGram Stealer
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1822089 Sample: xxB3WjGqpE.exe Startdate: 28/11/2025 Architecture: WINDOWS Score: 100 21 www.chess.com 2->21 23 steamcommunity.com 2->23 25 easternwhiskerholdings.sbs 2->25 35 Malicious sample detected (through community Yara rule) 2->35 37 Antivirus detection for URL or domain 2->37 39 Multi AV Scanner detection for submitted file 2->39 41 2 other signatures 2->41 7 xxB3WjGqpE.exe 501 2->7         started        11 xxB3WjGqpE.exe 501 2->11         started        signatures3 process4 dnsIp5 27 www.chess.com 104.18.141.67, 443, 49695, 49703 CLOUDFLARENETUS United States 7->27 29 easternwhiskerholdings.sbs 172.67.193.7, 443, 49697, 49698 CLOUDFLARENETUS United States 7->29 31 steamcommunity.com 184.30.122.179, 443, 49696 AKAMAI-ASUS United States 7->31 43 Found many strings related to Crypto-Wallets (likely being stolen) 7->43 45 Tries to steal Crypto Currency Wallets 7->45 47 Unusual module load detection (module proxying) 7->47 49 Switches to a custom stack to bypass stack traces 7->49 13 chrome.exe 7->13         started        15 msedge.exe 7->15         started        33 23.4.33.50, 443, 49704 AKAMAI-ASUS United States 11->33 51 Tries to harvest and steal browser information (history, passwords, etc) 11->51 53 Found direct / indirect Syscall (likely to bypass EDR) 11->53 17 chrome.exe 11->17         started        19 msedge.exe 11->19         started        signatures6 process7
Score:
99%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/90bb3c411fffd0b0969cf9358658963c41ddc3b43ed7b957dad79db58d29e7e6
Verdict:
inconclusive
YARA:
4 match(es)
Tags:
Executable PE (Portable Executable) PE File Layout Win 64 Exe x64
Link:
https://app.malva.re/file/b16e96fcc4c356f921942a10dbb9de3e
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/90bb3c411fffd0b0969cf9358658963c41ddc3b43ed7b957dad79db58d29e7e6/
Verdict:
Malicious
Threat:
Trojan.Win64.Donut
Link:
https://tip.neiki.dev/file/90bb3c411fffd0b0969cf9358658963c41ddc3b43ed7b957dad79db58d29e7e6
Threat name:
Win64.Malware.Heuristic
Create hunting rule
Status:
Malicious
First seen:
2025-11-28 08:43:16 UTC
File Type:
PE+ (Exe)
AV detection:
15 of 36 (41.67%)
Threat level:
  2/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=sc5tyqi777ilbfu47e2ymwewhra53q5uh3l3sv6226o3ldjj47ta._file
Verdict:
malicious
Label(s):
donutloader
Create hunting rule
maskgramstealer
Create hunting rule
Similar samples:
29e59d1526220178f6809d6b84a8147a09924a7a33ad29f7b6e206b9ad116820
MaskGramStealer
8cdc955d3b984ef389b30c4038a8961a379eff7a03372d0cd9954d3631f9d9bb
MaskGramStealer
8d2345c7d51b83b80873e9ef69fccc3570e811ad8d9b8415f1f575e140b507cb
MaskGramStealer
9a8142df15c72df9981623d8876f1526dcdd79e95dcbec57025a2dfadc372da1
MaskGramStealer
a438c69b924e1396129de458136536b3c65353f3e525de7aa658dde43e488318
MaskGramStealer
e8b08cc9b26fa0ff42d77d0b0e8fd69f5894330585744c027734dc735ede1b65
MaskGramStealer
ee7b2b0c0fb0e8e5f34e5552ade173ea041bbfb429a5d9bd0221f3d65c6193cf
MaskGramStealer
error
MaskGramStealer
+ 1'768 additional samples on MalwareBazaar
Result
Malware family:
n/a
Score:
  7/10
Tags:
spyware stealer
Link:
https://tria.ge/reports/251128-kmnzbayraz/
Behaviour
Checks processor information in registry
Enumerates system info in registry
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary
Suspicious use of FindShellTrayWindow
Suspicious use of WriteProcessMemory
Drops file in Windows directory
Accesses cryptocurrency files/wallets, possible credential harvesting
Reads user/profile data of web browsers
Verdict:
Suspicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/bd1b156e-bd3f-4628-a34b-b096f2aaf4c3
Unpacked files
SH256 hash:
90bb3c411fffd0b0969cf9358658963c41ddc3b43ed7b957dad79db58d29e7e6
MD5 hash:
b16e96fcc4c356f921942a10dbb9de3e
SHA1 hash:
233d14b5d6c20637acc4197865da9ad14ba8c7d0
Link:
https://www.unpac.me/results/111553aa-76a9-404a-8d4d-57f259d7786d/
Malware family:
DonutLoader
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/90bb3c411fff/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
0.98
Link:
https://yomi.yoroi.company/submissions/90bb3c411fffd0b0969cf9358658963c41ddc3b43ed7b957dad79db58d29e7e6

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:command_and_control
Create hunting rule
Author:CD_R0M_
Description:This rule searches for common strings found by malware using C2. Based on a sample used by a Ransomware group
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__QueryInfo
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerException__ConsoleCtrl
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerException__SetConsoleCtrl
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DetectGoMethodSignatures
Create hunting rule
Author:Wyatt Tauber
Description:Detects Go method signatures in unpacked Go binaries
Rule name:Detect_Go_GOMAXPROCS
Create hunting rule
Author:Obscurity Labs LLC
Description:Detects Go binaries by the presence of runtime.GOMAXPROCS in the runtime metadata
Rule name:GoBinTest
Create hunting rule
Rule name:golang
Create hunting rule
Rule name:Golangmalware
Create hunting rule
Author:Dhanunjaya
Description:Malware in Golang
Rule name:golang_binary_string
Create hunting rule
Description:Golang strings present
Rule name:golang_bin_JCorn_CSC846
Create hunting rule
Author:Justin Cornwell
Description:CSC-846 Golang detection ruleset
Rule name:golang_duffcopy_amd64
Create hunting rule
Rule name:HiveRansomware
Create hunting rule
Author:Dhanunjaya
Description:Yara Rule To Detect Hive V4 Ransomware
Rule name:identity_golang
Create hunting rule
Author:Eric Yocam
Description:find Golang malware
Rule name:ProgramLanguage_Golang
Create hunting rule
Author:albertzsigovits
Description:Application written in Golang programming language
Rule name:RIPEMD160_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for RIPEMD-160 constants
Rule name:SEH__vectored
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:SHA1_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for SHA1 constants
Rule name:SHA512_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for SHA384/SHA512 constants
Rule name:ThreadControl__Context
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara

File information

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

Web download

MaskGramStealer

Executable exe 90bb3c411fffd0b0969cf9358658963c41ddc3b43ed7b957dad79db58d29e7e6

(this sample)

  
Dropped by
Amadey
  
Delivery method
Distributed via web download
  
URLhaus
https://urlhaus.abuse.ch/url/3718471/
Cape
Cape
https://www.capesandbox.com/analysis/41704/

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