MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 cf8aa638e3982b6f37c4a3070381663b65c0ebca89c394c06728d35ae7239a3e. 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


AsyncRAT


Vendor detections: 17


Intelligence 17 IOCs YARA 16 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: cf8aa638e3982b6f37c4a3070381663b65c0ebca89c394c06728d35ae7239a3e
SHA3-384 hash: cc0fdb19441fc5c1762232a573e5287a6f435574fb5b46bdaa58a9a7d0a74f4255943520b9959682bbc42630fbceca58
SHA1 hash: 5a42b3cfae6eab5084b3cf849633bbcc6332b4aa
MD5 hash: c40f6518162bc072da48b7458bc5d262
humanhash: two-mexico-nevada-oranges
File name:yr.exe
Download: download sample
Signature AsyncRAT
Create hunting rule
File size:294'400 bytes
First seen:2025-03-11 06:59:39 UTC
Last seen:2025-03-11 07:18:49 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'744 x AgentTesla, 19'609 x Formbook, 12'242 x SnakeKeylogger)
ssdeep 6144:rTZL7v9ZypbeI78GlOTJm2d+ROzDgFsQIH31y+R8k:rTZKjOQO3s+z
TLSH T1A8546A3429FF4129F133DF742FE8B4EAD99AAB63350DA46A2045434B8613D41EE9353E
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
dhash icon 30e8e4f0f0f0f030 (2 x AsyncRAT)
Reporter JAMESWT_WT
Tags:92-255-57-221 AsyncRAT booking ClickFix exe FakeCaptcha

Intelligence

File Origin
# of uploads :
2
# of downloads :
332
Origin country :
IT IT
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
yr.exe
Verdict:
Malicious activity
Analysis date:
2025-03-11 07:54:45 UTC
Tags:
remote xworm
Link:
https://app.any.run/tasks/18d48795-4a9e-4d90-9dc7-d5b2119be7db

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Verdict:
Malicious
Score:
99.9%
Link:
https://cyber-fortress.com/docs/result/index.php?id=67cfe9461f777fe30608d94f
Tags:
asyncrat micro xworm sage
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a file in the %temp% subdirectories
Launching a process
Creating a process with a hidden window
Creating a file
Сreating synchronization primitives
Using the Windows Management Instrumentation requests
Connection attempt to an infection source
Sending a TCP request to an infection source
Unauthorized injection to a system process
Verdict:
Malicious
Labled as:
Barys.Generic
Link:
https://www.hybrid-analysis.com/sample/cf8aa638e3982b6f37c4a3070381663b65c0ebca89c394c06728d35ae7239a3e
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/71cd0637-e0c3-4d8b-b833-1ade8244e6eb
Result
Threat name:
XWorm
Create hunting rule
Detection:
malicious
Classification:
troj.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1634945
Signature
.NET source code contains method to dynamically call methods (often used by packers)
.NET source code contains potential unpacker
.NET source code contains very large array initializations
.NET source code contains very large strings
.NET source code references suspicious native API functions
Allocates memory in foreign processes
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
C2 URLs / IPs found in malware configuration
Found malware configuration
Injects a PE file into a foreign processes
Joe Sandbox ML detected suspicious 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
Sigma detected: Dot net compiler compiles file from suspicious location
Suricata IDS alerts for network traffic
Writes to foreign memory regions
Yara detected AntiVM3
Yara detected XWorm
Behaviour
Behavior Graph:
Download SVG
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/cf8aa638e3982b6f37c4a3070381663b65c0ebca89c394c06728d35ae7239a3e
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/cf8aa638e3982b6f37c4a3070381663b65c0ebca89c394c06728d35ae7239a3e/
Threat name:
ByteCode-MSIL.Trojan.XWorm
Create hunting rule
Status:
Malicious
First seen:
2025-03-11 06:58:43 UTC
File Type:
PE (.Net Exe)
Extracted files:
3
AV detection:
22 of 24 (91.67%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=z6fkmohdtavw6n6eumdqhalghns4b26krhbzjqdhfdjvvzzdti7a._file
Verdict:
malicious
Label(s):
xworm
Create hunting rule
Similar samples:
error
AsyncRAT
Result
Malware family:
xworm
Create hunting rule
Score:
  10/10
Tags:
family:xworm discovery rat trojan
Link:
https://tria.ge/reports/250311-hstqmswyax/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
System Location Discovery: System Language Discovery
Suspicious use of SetThreadContext
Xworm
Xworm family
Detect Xworm Payload
Malware Config
C2 Extraction:
92.255.57.221:4414
Verdict:
Malicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/d8ffc51d-9d10-4271-9e40-f6fce1d6bc51
Unpacked files
SH256 hash:
cf8aa638e3982b6f37c4a3070381663b65c0ebca89c394c06728d35ae7239a3e
MD5 hash:
c40f6518162bc072da48b7458bc5d262
SHA1 hash:
5a42b3cfae6eab5084b3cf849633bbcc6332b4aa
Link:
https://www.unpac.me/results/9c074538-c195-4561-993a-1e6fb32d8966/
SH256 hash:
a58464b231cd81ae9e4ff045de9f29ae0bcb6f07acf207e738bbbe613d99fad6
MD5 hash:
9a8cd21bb30637f357978a789b3276f1
SHA1 hash:
2683c2b5c1e00ad362710143c7c709495380ea0f
Detections:
win_xworm_w0
Create hunting rule
XWorm
Create hunting rule
SUSP_NET_Large_Static_Array_In_Small_File_Jan24
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/9c074538-c195-4561-993a-1e6fb32d8966/
SH256 hash:
a9ed64eb4b5d9935760b0bf7901bd3e483d21309022c01f199bad339a5f241e8
MD5 hash:
6985ab9ac1d74790610c0ae62c27a082
SHA1 hash:
8e984362dc45681edc5e1ea52a7270033a9442bc
Detections:
win_xworm_w0
Create hunting rule
XWorm
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/9c074538-c195-4561-993a-1e6fb32d8966/
Parent samples :
4d2e3c53adb98c3e19ca07a06a3a30618c3c232f38687d2d33d346536d168d54
2c83b873dd678cbf90c9344645d902ad31f5fd2d22c17bceda29e933986873af
7112d6e993704ac4a491942edecfc0875a9f0bdfec898ad92fe94f5e9c205f27
713a9ec5fe2a81686942a159c168027da5910e72fd52d914cf8e6fc0a2cdb0e5
01565baa85ddb4b7034c620d9428024b43ae2375b8311e84aa7f06b91cc2c414
cf8aa638e3982b6f37c4a3070381663b65c0ebca89c394c06728d35ae7239a3e
a9ed64eb4b5d9935760b0bf7901bd3e483d21309022c01f199bad339a5f241e8
Malware family:
XWorm
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/cf8aa638e398/report/overview.html
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/cf8aa638e3982b6f37c4a3070381663b65c0ebca89c394c06728d35ae7239a3e

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:ByteCode_MSIL_Backdoor_AsyncRAT
Create hunting rule
Author:ReversingLabs
Description:Yara rule that detects AsyncRAT backdoor.
Rule name:Detect_PowerShell_Obfuscation
Create hunting rule
Author:daniyyell
Description:Detects obfuscated PowerShell commands commonly used in malicious scripts.
Rule name:INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
Create hunting rule
Author:ditekSHen
Description:Detects Windows executables referencing non-Windows User-Agents
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:NET
Create hunting rule
Author:malware-lu
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_w0
Create hunting rule
Author:jeFF0Falltrades
Description:Detects win.xworm.
Rule name:xworm
Create hunting rule
Author:jeFF0Falltrades
Rule name:xworm_kingrat
Create hunting rule
Author:jeFF0Falltrades

File information

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

Web download

AsyncRAT

Executable exe cf8aa638e3982b6f37c4a3070381663b65c0ebca89c394c06728d35ae7239a3e

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/3459616/
  
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 (GUARD_CF)high

Comments