MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b1ef7b267d887e34bf0242a94b38e7dc9fd5e6f8b2c5c440ce4ec98cc74642fb. 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


RustyStealer


Vendor detections: 9


Intelligence 9 IOCs YARA 8 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: b1ef7b267d887e34bf0242a94b38e7dc9fd5e6f8b2c5c440ce4ec98cc74642fb
SHA3-384 hash: 0cc46e87639489a5454f9096be0b729a295fabc687891efca1d181c2c4c14b3d10f3cde23a76ea8603845a7a133b8d62
SHA1 hash: bc013aace5491c65a869e944123a4344cea6c1f0
MD5 hash: 54e383ca658ebd3caaf586f032f1c401
humanhash: romeo-california-oregon-yellow
File name:b1ef7b267d887e34bf0242a94b38e7dc9fd5e6f8b2c5c440ce4ec98cc74642fb
Download: download sample
Signature RustyStealer
Create hunting rule
File size:5'447'168 bytes
First seen:2025-01-12 17:47:35 UTC
Last seen:2025-07-30 09:42:54 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash ce5f91eb3b1ebc7df7d7ab97a153e7b7 (2 x RustyStealer)
ssdeep 49152:UTyQOnGEoOozdSv3U4Yn0+U0vN52S7aoRPWicuRX3EYqDqmjVNiIhnU/hHYBWZh0:KSv31WaZlah4q1W61nH/a
TLSH T1E5462A22BB6A99ADC49AC0B0835687B2697134CA0B3579FF44C446743E79EF42F3C758
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 TheRavenFile
Tags:exe funklocker funksec Ransomware RustyStealer


Avatar
RakeshKrish12
Source: https://github.com/TheRavenFile/IOC/blob/main/FUNKSEC%20Ransomware

Intelligence

File Origin
# of uploads :
2
# of downloads :
220
Origin country :
IN IN
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
b1ef7b267d887e34bf0242a94b38e7dc9fd5e6f8b2c5c440ce4ec98cc74642fb
Verdict:
No threats detected
Analysis date:
2025-01-13 00:44:37 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/05e54e30-f355-45fc-94a1-83512d798441

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Verdict:
Clean
Score:
89.1%
Link:
https://cyber-fortress.com/docs/result/index.php?id=678400581e9cdec7dbbbd911
Tags:
n/a
Result
Verdict:
Clean
Maliciousness:

Behaviour
Searching for the window
Launching the process to interact with network services
Launching a process
Creating a file
DNS request
Connection attempt
Sending a custom TCP request
Changing a file
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
anti-debug microsoft_visual_cc
Link:
https://www.filescan.io/uploads/67840055d62d8b6606d1f3af/reports/9d433607-ff7d-46d1-b863-d0dc2404643b/overview
Verdict:
Malicious
Labled as:
Trojan.Generic
Link:
https://www.hybrid-analysis.com/sample/b1ef7b267d887e34bf0242a94b38e7dc9fd5e6f8b2c5c440ce4ec98cc74642fb
Result
Verdict:
UNKNOWN
Details
Windows PE Executable
Found a Windows Portable Executable (PE) binary. Depending on context, the presence of a binary is suspicious or malicious.
Verdict:
Suspicious
Link:
https://analyze.intezer.com/analyses/eaed9bd8-e19e-49d4-935c-c64bf48f3cc5
Result
Threat name:
n/a
Detection:
malicious
Classification:
evad
Score:
56 / 100
Link:
https://www.joesandbox.com/analysis/1589529
Signature
AI detected suspicious sample
Creates files in the recycle bin to hide itself
Multi AV Scanner detection for submitted file
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1589529 Sample: fMDYks4W2a.exe Startdate: 12/01/2025 Architecture: WINDOWS Score: 56 21 ipv4.imgur.map.fastly.net 2->21 23 i.imgur.com 2->23 27 Multi AV Scanner detection for submitted file 2->27 29 AI detected suspicious sample 2->29 8 fMDYks4W2a.exe 136 2->8         started        signatures3 process4 dnsIp5 25 ipv4.imgur.map.fastly.net 199.232.192.193, 443, 49709 FASTLYUS United States 8->25 19 C:\$Recycle.Bin\...\desktop.ini.Lock, OpenPGP 8->19 dropped 31 Creates files in the recycle bin to hide itself 8->31 13 net.exe 1 8->13         started        15 conhost.exe 8->15         started        file6 signatures7 process8 process9 17 net1.exe 1 13->17         started       
Score:
79%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/b1ef7b267d887e34bf0242a94b38e7dc9fd5e6f8b2c5c440ce4ec98cc74642fb
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/b1ef7b267d887e34bf0242a94b38e7dc9fd5e6f8b2c5c440ce4ec98cc74642fb/
Threat name:
Win64.Ransomware.Funksec
Create hunting rule
Status:
Malicious
First seen:
2025-01-01 21:24:51 UTC
File Type:
PE+ (Exe)
AV detection:
14 of 24 (58.33%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=whxxwjt5rb7djpycikuuwohh3sp5lzxywlc4iqgoj3eyzr2gil5q._file
Result
Malware family:
n/a
Score:
  5/10
Tags:
ransomware
Link:
https://tria.ge/reports/250112-wde6lavmap/
Behaviour
Runs net.exe
Suspicious use of WriteProcessMemory
Drops file in Program Files directory
Sets desktop wallpaper using registry
Verdict:
Malicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/7e3555a0-d71c-4fb9-82f1-72cea6f8aeb6
Unpacked files
SH256 hash:
b1ef7b267d887e34bf0242a94b38e7dc9fd5e6f8b2c5c440ce4ec98cc74642fb
MD5 hash:
54e383ca658ebd3caaf586f032f1c401
SHA1 hash:
bc013aace5491c65a869e944123a4344cea6c1f0
Link:
https://www.unpac.me/results/7d043b01-863d-4db6-92a0-fc01e909e217/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/b1ef7b267d887e34bf0242a94b38e7dc9fd5e6f8b2c5c440ce4ec98cc74642fb

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:DebuggerCheck__API
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:golang_bin_JCorn_CSC846
Create hunting rule
Author:Justin Cornwell
Description:CSC-846 Golang detection ruleset
Rule name:pe_detect_tls_callbacks
Create hunting rule
Rule name:RANSOMWARE
Create hunting rule
Author:ToroGuitar
Rule name:reverse_http
Create hunting rule
Author:CD_R0M_
Description:Identify strings with http reversed (ptth)
Rule name:Rustyloader_mem_loose
Create hunting rule
Author:James_inthe_box
Description:Corroded buerloader
Reference:https://app.any.run/tasks/83064edd-c7eb-4558-85e8-621db72b2a24
Rule name:SEH__vectored
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.

BLint

The following table provides more information about this file using BLint. BLint is a Binary Linter to check the security properties, and capabilities in executables.

Findings
IDTitleSeverity
CHECK_AUTHENTICODEMissing Authenticodehigh
CHECK_DLL_CHARACTERISTICSMissing dll Security Characteristics (GUARD_CF)high
Reviews
IDCapabilitiesEvidence
SS_APIUses SS APIsecur32.dll::AcceptSecurityContext
secur32.dll::AcquireCredentialsHandleA
secur32.dll::ApplyControlToken
secur32.dll::DecryptMessage
secur32.dll::DeleteSecurityContext
secur32.dll::QueryContextAttributesW
WIN32_PROCESS_APICan Create Process and Threadskernel32.dll::CreateProcessW
kernel32.dll::CloseHandle
kernel32.dll::CreateThread
WIN_BASE_APIUses Win Base APIkernel32.dll::LoadLibraryA
kernel32.dll::GetSystemInfo
kernel32.dll::GetCommandLineW
WIN_BASE_EXEC_APICan Execute other programskernel32.dll::WriteConsoleW
kernel32.dll::GetConsoleMode
WIN_BASE_IO_APICan Create Fileskernel32.dll::CreateFileW
ntdll.dll::NtCreateFile
kernel32.dll::DeleteFileW
ntdll.dll::NtDeviceIoControlFile
kernel32.dll::GetWindowsDirectoryW
kernel32.dll::GetSystemDirectoryW
WIN_BCRYPT_APICan Encrypt Filesbcrypt.dll::BCryptGenRandom
WIN_CRYPT_APIUses Windows Crypt APIcrypt32.dll::CertAddCertificateContextToStore
crypt32.dll::CertDuplicateCertificateChain
crypt32.dll::CertDuplicateCertificateContext
crypt32.dll::CertDuplicateStore
crypt32.dll::CertEnumCertificatesInStore
crypt32.dll::CertFreeCertificateChain
WIN_REG_APICan Manipulate Windows Registryadvapi32.dll::RegOpenKeyExW
advapi32.dll::RegQueryValueExW
WIN_SOCK_APIUses Network to send and receive dataws2_32.dll::bind
ws2_32.dll::closesocket
ws2_32.dll::connect
ws2_32.dll::freeaddrinfo
ws2_32.dll::getaddrinfo
ws2_32.dll::getpeername

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