MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 c91fec2baba671461bc033211721c140d0337eaaa0a83092b4d83bab2f9f9805. 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: 18


Intelligence 18 IOCs YARA 4 File information Comments
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SHA256 hash: c91fec2baba671461bc033211721c140d0337eaaa0a83092b4d83bab2f9f9805
SHA3-384 hash: 5b923bb2536cc02623859dccca49c6cd897f9ac6a2de4a1aa922805ec6ad34bfa2422377bba7b07b3defcf4efa84d68a
SHA1 hash: 9c642bdf14d30b6d18e5cc7cb849f178b9fe2e87
MD5 hash: 69c7adf3cdbc010ec49c5d70f18c2a1b
humanhash: comet-low-nitrogen-speaker
File name:steamtools setup.exe
Download: download sample
Signature AsyncRAT
Create hunting rule
File size:8'760'320 bytes
First seen:2025-04-23 16:02:23 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'652 x AgentTesla, 19'463 x Formbook, 12'205 x SnakeKeylogger)
ssdeep 196608:hCpJwaGgzf72s1Yu/7HGsQuljGFxt3K16wFyvI0GV/rhal:hCpbGC1YLAlj0jK16wFmInV/ly
TLSH T17D96331D2144D26FF0AC6B34D591EF758F74835AAB1848DC3A2C21A13A747A7A90FCBD
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 70d09a9c8c86c470 (1 x AsyncRAT)
Reporter BastianHein
Tags:AsyncRAT exe

Intelligence

File Origin
# of uploads :
1
# of downloads :
416
Origin country :
CL CL
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
steamtools setup.exe
Verdict:
Malicious activity
Analysis date:
2025-04-23 16:06:59 UTC
Tags:
evasion xworm crypto-regex remote auto-reg auto-startup
Link:
https://app.any.run/tasks/70af7d4d-09a5-4134-b735-c21bfe55a0ff

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/3731/
Detection(s):
SecuriteInfo.com.Trojan.PWS.Stealer.35217.19945.14941.UNOFFICIAL
Create hunting rule

Verdict:
Malicious
Score:
99.9%
Link:
https://cyber-fortress.com/docs/result/index.php?id=680911b1a37ff28e1298a947
Tags:
vmdetect asyncrat
Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Сreating synchronization primitives
Creating a file in the %AppData% directory
Creating a process from a recently created file
Creating a file
Creating a file in the %temp% directory
Creating a window
Using the Windows Management Instrumentation requests
DNS request
Connection attempt
Sending an HTTP GET request
Creating a process with a hidden window
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:
anti-vm entropy obfuscated obfuscated packed packed packer_detected vbnet
Link:
https://www.filescan.io/uploads/68090f47a8d43a4dd610de4a/reports/94a9794e-9d56-4af2-8893-a852ec53312a/overview
Verdict:
Malicious
Labled as:
Jalapeno.Generic
Link:
https://www.hybrid-analysis.com/sample/c91fec2baba671461bc033211721c140d0337eaaa0a83092b4d83bab2f9f9805
Malware family:
XWorm
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/0b85bec1-0d33-4230-9407-079d28addbdf
Result
Threat name:
XWorm
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1672266
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
Antivirus detection for URL or domain
Bypasses PowerShell execution policy
C2 URLs / IPs found in malware configuration
Check if machine is in data center or colocation facility
Contains functionality to check if a debugger is running (CheckRemoteDebuggerPresent)
Drops PE files with benign system names
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
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: Files With System Process Name In Unsuspected Locations
Sigma detected: Powershell Base64 Encoded MpPreference Cmdlet
Sigma detected: Schedule system process
Sigma detected: System File Execution Location Anomaly
Suricata IDS alerts for network traffic
System process connects to network (likely due to code injection or exploit)
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 XWorm
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1672266 Sample: steamtools setup.exe Startdate: 23/04/2025 Architecture: WINDOWS Score: 100 81 stools.oss-cn-shanghai.aliyuncs.com 2->81 83 steamtools.info 2->83 85 6 other IPs or domains 2->85 95 Suricata IDS alerts for network traffic 2->95 97 Found malware configuration 2->97 99 Malicious sample detected (through community Yara rule) 2->99 101 15 other signatures 2->101 9 steamtools setup.exe 4 2->9         started        12 svchost 2->12         started        15 explorer.exe 2->15         started        17 2 other processes 2->17 signatures3 process4 dnsIp5 73 C:\Users\user\AppData\Roaming\svchost.exe, PE32 9->73 dropped 75 C:\Users\user\AppData\...\st-setup-1.8.16.exe, PE32+ 9->75 dropped 77 C:\Users\user\...\steamtools setup.exe.log, CSV 9->77 dropped 20 svchost.exe 1 6 9->20         started        25 st-setup-1.8.16.exe 8 54 9->25         started        111 Antivirus detection for dropped file 12->111 113 Multi AV Scanner detection for dropped file 12->113 27 cmd.exe 15->27         started        79 127.0.0.1 unknown unknown 17->79 file6 signatures7 process8 dnsIp9 87 107.172.44.175, 1889, 49696 AS-COLOCROSSINGUS United States 20->87 89 ip-api.com 208.95.112.1, 49681, 80 TUT-ASUS United States 20->89 63 C:\Users\user\AppData\Roaming\svchost, PE32 20->63 dropped 103 System process connects to network (likely due to code injection or exploit) 20->103 105 Multi AV Scanner detection for dropped file 20->105 107 Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines) 20->107 109 6 other signatures 20->109 29 powershell.exe 23 20->29         started        32 powershell.exe 20->32         started        34 powershell.exe 20->34         started        47 2 other processes 20->47 65 C:\Users\user\AppData\Local\...\nsExec.dll, PE32+ 25->65 dropped 67 C:\Users\user\AppData\Local\...\nsDialogs.dll, PE32+ 25->67 dropped 69 C:\Users\user\AppData\Local\...\System.dll, PE32+ 25->69 dropped 71 14 other malicious files 25->71 dropped 36 icacls.exe 1 25->36         started        38 icacls.exe 1 25->38         started        40 explorer.exe 25->40         started        42 SteamTools.exe 27->42         started        45 conhost.exe 27->45         started        file10 signatures11 process12 dnsIp13 115 Loading BitLocker PowerShell Module 29->115 49 conhost.exe 29->49         started        51 conhost.exe 32->51         started        53 conhost.exe 34->53         started        55 conhost.exe 36->55         started        57 conhost.exe 38->57         started        91 sc-2ksw.cn-shanghai.oss-adns.aliyuncs.com.gds.alibabadns.com 8.133.135.83, 49688, 80 CNNIC-ALIBABA-CN-NET-APHangzhouAlibabaAdvertisingCoLtd Singapore 42->91 93 488928.sched.sma.tdnsstic1.cn 101.72.254.91, 49687, 80 CHINA169-BACKBONECHINAUNICOMChina169BackboneCN China 42->93 59 conhost.exe 47->59         started        61 conhost.exe 47->61         started        signatures14 process15
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/c91fec2baba671461bc033211721c140d0337eaaa0a83092b4d83bab2f9f9805
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/c91fec2baba671461bc033211721c140d0337eaaa0a83092b4d83bab2f9f9805/
Threat name:
ByteCode-MSIL.Spyware.AsyncRAT
Create hunting rule
Status:
Malicious
First seen:
2025-04-23 03:07:16 UTC
File Type:
PE (.Net Exe)
Extracted files:
29
AV detection:
22 of 24 (91.67%)
Threat level:
  2/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=zep6yk5luzyumg6agmqroiobididg7vkucudbevu3a52wl47tacq._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 execution persistence rat trojan
Link:
https://tria.ge/reports/250423-thhq6sssdt/
Behaviour
Scheduled Task/Job: Scheduled Task
Suspicious behavior: AddClipboardFormatListener
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
Suspicious use of SendNotifyMessage
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Uses Task Scheduler COM API
Enumerates physical storage devices
Drops file in Program Files directory
Adds Run key to start application
Checks installed software on the system
Looks up external IP address via web service
Checks computer location settings
Drops startup file
Executes dropped EXE
Loads dropped DLL
Modifies file permissions
Command and Scripting Interpreter: PowerShell
Detect Xworm Payload
Xworm
Xworm family
Malware Config
C2 Extraction:
107.172.44.175:1889
Verdict:
Malicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/e7c7da97-bfce-4e69-84a3-35b618c520de
Unpacked files
SH256 hash:
c91fec2baba671461bc033211721c140d0337eaaa0a83092b4d83bab2f9f9805
MD5 hash:
69c7adf3cdbc010ec49c5d70f18c2a1b
SHA1 hash:
9c642bdf14d30b6d18e5cc7cb849f178b9fe2e87
Link:
https://www.unpac.me/results/0ed65bf1-e591-4b9b-9e24-1172574681f4/
SH256 hash:
65bb9ea0e754eec85d425f1936d0aff0211546f54feaeec5621dd06bbc1dcab8
MD5 hash:
32a7c924d1fd14826740f4bdbaab7b84
SHA1 hash:
0325f38d2d833e6dec07980bbab7b40aaa9c29f7
Detections:
win_xworm_w0
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/0ed65bf1-e591-4b9b-9e24-1172574681f4/
Malware family:
XWorm
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/c91fec2baba6/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/c91fec2baba671461bc033211721c140d0337eaaa0a83092b4d83bab2f9f9805

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: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)
Rule name:vmdetect
Create hunting rule
Author:nex
Description:Possibly employs anti-virtualization techniques

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/3731/

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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