MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 bc1b38d36be44ff0b3f853d4cbfadc275bcf0898a9ca41607887b7d1eb2c124d. 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


XWorm


Vendor detections: 15


Intelligence 15 IOCs YARA 11 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: bc1b38d36be44ff0b3f853d4cbfadc275bcf0898a9ca41607887b7d1eb2c124d
SHA3-384 hash: a3b99925d70f038b666a936dc200eb3f38e4edf2b977d767408d466f45cf7f8eb0250ab4b674718d7c038310bde6d14b
SHA1 hash: 426084ea3a2416f9565ee5e4c6f8eccf23bf9d87
MD5 hash: e086ce76999f267eb515d72797a96afc
humanhash: london-apart-fish-alabama
File name:bU8H.exe
Download: download sample
Signature XWorm
Create hunting rule
File size:37'888 bytes
First seen:2024-04-14 19:07:55 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'742 x AgentTesla, 19'606 x Formbook, 12'242 x SnakeKeylogger)
ssdeep 768:v5QFv4GAumU04pouLHJiVEW16Fp9HfJOMhd3Ogdk:vGB4GAum16dcEDFp9HBOMrDk
TLSH T13C033B18BB950226C9FD6FF559B366070274E217DD03EB4D0CD899EA2B2BBC08D513E6
TrID 60.4% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
10.8% (.SCR) Windows screen saver (13097/50/3)
8.7% (.EXE) Win64 Executable (generic) (10523/12/4)
5.4% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
4.1% (.EXE) Win16 NE executable (generic) (5038/12/1)
Reporter pmelson
Tags:exe xworm

Intelligence

File Origin
# of uploads :
1
# of downloads :
581
Origin country :
US US
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
bc1b38d36be44ff0b3f853d4cbfadc275bcf0898a9ca41607887b7d1eb2c124d.exe
Verdict:
Malicious activity
Analysis date:
2024-04-14 19:08:54 UTC
Tags:
xworm remote
Link:
https://app.any.run/tasks/563a0465-9fb6-423e-815c-f2b8c625ee58

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Result
Verdict:
Malware
Maliciousness:

Behaviour
Сreating synchronization primitives
Creating a window
Using the Windows Management Instrumentation requests
DNS request
Connection attempt
Sending a custom TCP request
Launching a process
Moving a file to the Program Files subdirectory
Replacing files
Setting a global event handler for the keyboard
Verdict:
Malicious
Labled as:
IL:Trojan.MSILZilla
Link:
https://www.hybrid-analysis.com/sample/bc1b38d36be44ff0b3f853d4cbfadc275bcf0898a9ca41607887b7d1eb2c124d
Result
Verdict:
MALICIOUS
Details
Windows PE Executable
Found a Windows Portable Executable (PE) binary. Depending on context, the presence of a binary is suspicious or malicious.
Malware family:
XWorm
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/01d1a979-e54b-490d-8ee3-bf2a223dfc66
Result
Threat name:
XWorm
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1425819
Signature
.NET source code contains method to dynamically call methods (often used by packers)
.NET source code contains potential unpacker
Antivirus / Scanner detection for submitted sample
C2 URLs / IPs found in malware configuration
Contains functionality to capture screen (.Net source)
Contains functionality to log keystrokes (.Net Source)
Found malware configuration
Machine Learning detection for sample
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for submitted file
Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines)
Sample uses string decryption to hide its real strings
Snort IDS alert for network traffic
Uses dynamic DNS services
Uses the Telegram API (likely for C&C communication)
Yara detected Generic Downloader
Yara detected Telegram RAT
Yara detected XWorm
Behaviour
Behavior Graph:
Download SVG
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/bc1b38d36be44ff0b3f853d4cbfadc275bcf0898a9ca41607887b7d1eb2c124d
Detection:
xworm
Create hunting rule
Link:
https://mwdb.cert.pl/sample/bc1b38d36be44ff0b3f853d4cbfadc275bcf0898a9ca41607887b7d1eb2c124d/
Threat name:
ByteCode-MSIL.Backdoor.XWorm
Create hunting rule
Status:
Malicious
First seen:
2024-04-14 19:08:04 UTC
File Type:
PE (.Net Exe)
Extracted files:
1
AV detection:
22 of 24 (91.67%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=xqntru3l4rh7bm7ykpkmx6w4e5n46ceyvhfecydyq635d2zmcjgq._file
Verdict:
malicious
Result
Malware family:
xworm
Create hunting rule
Score:
  10/10
Tags:
family:xworm rat trojan
Link:
https://tria.ge/reports/240414-xs7d3abc47/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Detect Xworm Payload
Xworm
Malware Config
C2 Extraction:
craxsr4t.duckdns.org:26099
Unpacked files
SH256 hash:
bc1b38d36be44ff0b3f853d4cbfadc275bcf0898a9ca41607887b7d1eb2c124d
MD5 hash:
e086ce76999f267eb515d72797a96afc
SHA1 hash:
426084ea3a2416f9565ee5e4c6f8eccf23bf9d87
Detections:
XWorm
Create hunting rule
INDICATOR_SUSPICIOUS_EXE_TelegramChatBot
Create hunting rule
MALWARE_Win_XWorm
Create hunting rule
win_mal_XWorm
Create hunting rule
INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
Create hunting rule
MALWARE_Win_AsyncRAT
Create hunting rule
Link:
https://www.unpac.me/results/dbfc84cc-641c-480a-a4c0-42247d2e1288/
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/bc1b38d36be44ff0b3f853d4cbfadc275bcf0898a9ca41607887b7d1eb2c124d

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:INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
Create hunting rule
Author:ditekSHen
Description:Detects Windows executables referencing non-Windows User-Agents
Rule name:INDICATOR_SUSPICIOUS_EXE_TelegramChatBot
Create hunting rule
Author:ditekSHen
Description:Detects executables using Telegram Chat Bot
Rule name:MALWARE_Win_AsyncRAT
Create hunting rule
Author:ditekSHen
Description:Detects AsyncRAT
Rule name:MALWARE_Win_XWorm
Create hunting rule
Author:ditekSHen
Description:Detects XWorm
Rule name:Multifamily_RAT_Detection
Create hunting rule
Author:Lucas Acha (http://www.lukeacha.com)
Description:Generic Detection for multiple RAT families, PUPs, Packers and suspicious executables
Rule name:NETexecutableMicrosoft
Create hunting rule
Author:malware-lu
Rule name:Njrat
Create hunting rule
Author:botherder https://github.com/botherder
Description:Njrat
Rule name:pe_imphash
Create hunting rule
Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash
Rule name:SUSP_DOTNET_PE_List_AV
Create hunting rule
Author:SECUINFRA Falcon Team
Description:Detecs .NET Binary that lists installed AVs
Rule name:win_xworm_bytestring
Create hunting rule
Author:Matthew @ Embee_Research
Description:Detects bytestring present in unobfuscated xworm

File information

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

Web download

XWorm

Executable exe bc1b38d36be44ff0b3f853d4cbfadc275bcf0898a9ca41607887b7d1eb2c124d

(this sample)

  
Link
https://www.virustotal.com/gui/file/bc1b38d36be44ff0b3f853d4cbfadc275bcf0898a9ca41607887b7d1eb2c124d/detection
  
Delivery method
Distributed via web download

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 (HIGH_ENTROPY_VA)high

Comments