MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b4d6c042e0ba3b560a4fc22e607bbe6645e5fe2c7e928ee6c564d49f3b50dda1. 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: 18


Intelligence 18 IOCs YARA 4 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: b4d6c042e0ba3b560a4fc22e607bbe6645e5fe2c7e928ee6c564d49f3b50dda1
SHA3-384 hash: bbbdc9d9236edc146a4af74948345971095d7aa090520886e7170c829e9899cc8b5c5cba2b2eda1a504aa09ed139fb1e
SHA1 hash: 85b9aabdd2d0521bb198cb6dd7c67b685f1ab6f7
MD5 hash: cac1d8d1320ceb6b458c8d7ef1e3d548
humanhash: sweet-jig-winner-yellow
File name:bootstrapper.exe
Download: download sample
Signature XWorm
Create hunting rule
File size:2'097'152 bytes
First seen:2025-04-24 12:21:11 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'853 x AgentTesla, 19'779 x Formbook, 12'303 x SnakeKeylogger)
ssdeep 24576:Kswo+Xo66J4AoZR7pO5aRwnHtli0wmRj6FLBmZ2:KrX6iF7pRQwMuFL4Z2
Threatray 1'080 similar samples on MalwareBazaar
TLSH T1D9A59E1844E3668FC1562570B8DD114A6B250DD868CDBCE4AF7B3F6E37FB80A1C06A79
TrID 71.1% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
10.2% (.EXE) Win64 Executable (generic) (10522/11/4)
6.3% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
4.3% (.EXE) Win32 Executable (generic) (4504/4/1)
2.0% (.ICL) Windows Icons Library (generic) (2059/9)
Magika pebin
Reporter BastianHein
Tags:exe xworm

Intelligence

File Origin
# of uploads :
1
# of downloads :
470
Origin country :
CL CL
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
bootstrapper.exe
Verdict:
Malicious activity
Analysis date:
2025-04-24 04:29:26 UTC
Tags:
evasion pastebin auto-reg xworm iqvw64e-sys vuln-driver auto-startup remote
Link:
https://app.any.run/tasks/335790b3-23bb-4401-b4c0-655a97e23e9d

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
XWorm
Create hunting rule
Link:
https://www.capesandbox.com/analysis/3851/
Verdict:
Malicious
Score:
99.9%
Link:
https://cyber-fortress.com/docs/result/index.php?id=6809be25a37ff28e1298fe30
Tags:
asyncrat emotet
Result
Verdict:
Malware
Maliciousness:

Behaviour
Сreating synchronization primitives
Creating a file in the %AppData% directory
Creating a process from a recently created file
Creating a file
Running batch commands
Creating a file in the Windows subdirectories
Creating a process with a hidden window
Using the Windows Management Instrumentation requests
DNS request
Connection attempt
Sending an HTTP GET request
Launching a process
Unauthorized injection to a recently created process
Adding an exclusion to Microsoft Defender
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
entropy obfuscated overlay overlay packed packed packer_detected vbnet
Link:
https://www.filescan.io/uploads/680a2cf546fe05453ca6110d/reports/22257642-b418-4bcf-a294-1aba26d9858c/overview
Verdict:
Malicious
Labled as:
Jalapeno.Generic
Link:
https://www.hybrid-analysis.com/sample/b4d6c042e0ba3b560a4fc22e607bbe6645e5fe2c7e928ee6c564d49f3b50dda1
Malware family:
XWorm
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/660f2932-70fe-4818-bde0-b6bd462e9f96
Result
Threat name:
AsyncRAT, XWorm
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1673028
Signature
.NET source code contains method to dynamically call methods (often used by packers)
.NET source code contains potential unpacker
Adds a directory exclusion to Windows Defender
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
Bypasses PowerShell execution policy
C2 URLs / IPs found in malware configuration
Check if machine is in data center or colocation facility
Connects to a pastebin service (likely for C&C)
Connects to many ports of the same IP (likely port scanning)
Contains functionality to check if a debugger is running (CheckRemoteDebuggerPresent)
Contains functionality to log keystrokes (.Net Source)
Drops executables to the windows directory (C:\Windows) and starts them
Found malware configuration
Joe Sandbox ML detected suspicious sample
Loading BitLocker PowerShell Module
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Protects its processes via BreakOnTermination flag
Sample uses string decryption to hide its real strings
Sigma detected: Powershell Base64 Encoded MpPreference Cmdlet
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Uses schtasks.exe or at.exe to add and modify task schedules
Yara detected AsyncRAT
Yara detected XWorm
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1673028 Sample: bootstrapper.exe Startdate: 24/04/2025 Architecture: WINDOWS Score: 100 71 pastebin.com 2->71 73 libetolo-34967.portmap.io 2->73 75 ip-api.com 2->75 83 Found malware configuration 2->83 85 Malicious sample detected (through community Yara rule) 2->85 87 Antivirus / Scanner detection for submitted sample 2->87 91 12 other signatures 2->91 10 bootstrapper.exe 4 2->10         started        13 XClient.exe 2->13         started        15 XClient.exe 2->15         started        17 2 other processes 2->17 signatures3 89 Connects to a pastebin service (likely for C&C) 71->89 process4 file5 63 C:\Users\user\AppData\Roaming\Output.exe, PE32 10->63 dropped 65 C:\Users\user\AppData\Roaming\Injector.exe, PE32+ 10->65 dropped 67 C:\Users\user\...\bootstrapper.exe.log, CSV 10->67 dropped 19 Output.exe 3 10->19         started        23 Injector.exe 3 10->23         started        process6 file7 59 C:\Users\user\AppData\Roaming\XClient.exe, PE32 19->59 dropped 93 Antivirus detection for dropped file 19->93 95 Multi AV Scanner detection for dropped file 19->95 97 Tries to detect sandboxes and other dynamic analysis tools (process name or module or function) 19->97 25 XClient.exe 15 5 19->25         started        61 C:\Windows\SoftwareDistribution\...\cCrEC.exe, PE32+ 23->61 dropped 99 Drops executables to the windows directory (C:\Windows) and starts them 23->99 29 cCrEC.exe 2 2 23->29         started        32 conhost.exe 23->32         started        34 cmd.exe 1 23->34         started        36 cmd.exe 1 23->36         started        signatures8 process9 dnsIp10 77 libetolo-34967.portmap.io 193.161.193.99, 34967, 49694, 49695 BITREE-ASRU Russian Federation 25->77 79 ip-api.com 208.95.112.1, 49690, 80 TUT-ASUS United States 25->79 81 pastebin.com 104.22.68.199, 443, 49693 CLOUDFLARENETUS United States 25->81 103 Antivirus detection for dropped file 25->103 105 Multi AV Scanner detection for dropped file 25->105 107 Protects its processes via BreakOnTermination flag 25->107 109 5 other signatures 25->109 38 powershell.exe 23 25->38         started        41 powershell.exe 25->41         started        43 powershell.exe 25->43         started        47 2 other processes 25->47 69 C:\Users\user\AppData\Local\...\eKhlhktAbcH, PE32+ 29->69 dropped 45 conhost.exe 29->45         started        file11 signatures12 process13 signatures14 101 Loading BitLocker PowerShell Module 38->101 49 conhost.exe 38->49         started        51 conhost.exe 41->51         started        53 conhost.exe 43->53         started        55 conhost.exe 47->55         started        57 conhost.exe 47->57         started        process15
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/b4d6c042e0ba3b560a4fc22e607bbe6645e5fe2c7e928ee6c564d49f3b50dda1
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/b4d6c042e0ba3b560a4fc22e607bbe6645e5fe2c7e928ee6c564d49f3b50dda1/
Threat name:
ByteCode-MSIL.Spyware.AsyncRAT
Create hunting rule
Status:
Malicious
First seen:
2025-04-24 04:29:26 UTC
File Type:
PE (.Net Exe)
Extracted files:
15
AV detection:
21 of 24 (87.50%)
Threat level:
  2/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=wtlmaqxaxi5vmcspyixga656mzc6l7rmp2ji5zwfmtkj6o2q3wqq._file
Verdict:
malicious
Label(s):
xworm
Create hunting rule
Similar samples:
10092bca5b72fe5613e2c2d83adbba3f8d84563b172789ba8220811edbac8759
XWorm
3d6e7e00580e1b17849dcd6c80cbe10b09b2e677deda5016c3baba36517dd462
XWorm
536c0da703e83f003d6a8902a4d7a9c75a0ef93cb6809349729dd733813b0c99
XWorm
90e5d4c94308393080431d375a33aeb1b8219c5448d64afb787bb30ee01dd3c6
XWorm
b4d6c042e0ba3b560a4fc22e607bbe6645e5fe2c7e928ee6c564d49f3b50dda1
XWorm
error
XWorm
+ 1'070 additional samples on MalwareBazaar
Result
Malware family:
xworm
Create hunting rule
Score:
  10/10
Tags:
family:xworm persistence rat trojan
Link:
https://tria.ge/reports/250424-pjezfszwas/
Behaviour
Suspicious behavior: LoadsDriver
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Drops file in Windows directory
Looks up external IP address via web service
Checks computer location settings
Executes dropped EXE
Sets service image path in registry
Detect Xworm Payload
Xworm
Xworm family
Verdict:
Malicious
Tags:
external_ip_lookup
YARA:
n/a
Link:
https://app.threat.zone/submission/6bf5ed83-7669-4a31-ae23-66c5bb8b3cc6
Unpacked files
SH256 hash:
b4d6c042e0ba3b560a4fc22e607bbe6645e5fe2c7e928ee6c564d49f3b50dda1
MD5 hash:
cac1d8d1320ceb6b458c8d7ef1e3d548
SHA1 hash:
85b9aabdd2d0521bb198cb6dd7c67b685f1ab6f7
Link:
https://www.unpac.me/results/f96ec5c8-fb81-4424-bb80-9f93d29d2c2f/
SH256 hash:
5d12b716a9e3dc00e6e194b803bd8440114a3714cc8a1e2be9550bd1861fe257
MD5 hash:
8d4599dd75f66f5c9243c765c07798e7
SHA1 hash:
4f41baf761ac7023511e6c0c0b23f48511360299
Detections:
win_xworm_w0
Create hunting rule
XWorm
Create hunting rule
win_xworm_bytestring
Create hunting rule
win_mal_XWorm
Create hunting rule
INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
Create hunting rule
MALWARE_Win_AsyncRAT
Create hunting rule
MALWARE_Win_XWorm
Create hunting rule
Link:
https://www.unpac.me/results/f96ec5c8-fb81-4424-bb80-9f93d29d2c2f/
Malware family:
DCRat
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/b4d6c042e0ba/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Trojan
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/b4d6c042e0ba3b560a4fc22e607bbe6645e5fe2c7e928ee6c564d49f3b50dda1

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:NETexecutableMicrosoft
Create hunting rule
Author:malware-lu
Rule name:pe_imphash
Create hunting rule
Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash
Rule name:Sus_Obf_Enc_Spoof_Hide_PE
Create hunting rule
Author:XiAnzheng
Description:Check for Overlay, Obfuscating, Encrypting, Spoofing, Hiding, or Entropy Technique(can create FP)

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/3851/

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

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