MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b387fc76f390a2760a5242693419f051f17a3071fd9c75ca5b9968c5253edfcf. 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


Formbook


Vendor detections: 17


Intelligence 17 IOCs YARA 17 File information Comments
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SHA256 hash: b387fc76f390a2760a5242693419f051f17a3071fd9c75ca5b9968c5253edfcf
SHA3-384 hash: c71fb5df1e37cfcb7409f295709fe0e6ea92d2c06ec2525b0c2323ebddcaf6babd8bfc9b570b9cbe6faf1cf805b49bd2
SHA1 hash: f54cc47328f60dea7788687656992eca18336ae0
MD5 hash: 20ec0ec5f396bf72a91e5943fe426224
humanhash: arkansas-zulu-berlin-indigo
File name:b387fc76f390a2760a5242693419f051f17a3071fd9c75ca5b9968c5253edfcf.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:72'192 bytes
First seen:2024-10-09 21:04:18 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'853 x AgentTesla, 19'780 x Formbook, 12'304 x SnakeKeylogger)
ssdeep 1536:aZtJw+HbdXr7dJBTdVMbr/PNDyQA2w65XOxfks:aZLXRrBEbTI92LXOxfks
Threatray 902 similar samples on MalwareBazaar
TLSH T1F763AD1437E80525F2FFAFB528F06162CB35F617A503DA6F24C8429A1B639898D417FE
TrID 67.7% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
9.7% (.EXE) Win64 Executable (generic) (10523/12/4)
6.0% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
4.6% (.EXE) Win16 NE executable (generic) (5038/12/1)
4.1% (.EXE) Win32 Executable (generic) (4504/4/1)
Magika pebin
Reporter Chainskilabs
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
1
# of downloads :
376
Origin country :
US US
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
b387fc76f390a2760a5242693419f051f17a3071fd9c75ca5b9968c5253edfcf.exe
Verdict:
Malicious activity
Analysis date:
2024-10-09 21:07:46 UTC
Tags:
evasion crypto-regex xworm phishing
Link:
https://app.any.run/tasks/1aeba12f-efa1-4a99-87e8-3db08f1a1d65

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
Win.Packed.njRAT-10002074-1
Create hunting rule

Win.Packed.Msilzilla-10002982-0
Create hunting rule

Win.Packed.Loveletter-10023052-0
Create hunting rule

Win.Dropper.Nanocore-10024427-0
Create hunting rule

Win.Packed.Msilzilla-10024808-0
Create hunting rule

Win.Packed.Msilzilla-10026193-0
Create hunting rule

Win.Packed.Msilzilla-10026194-0
Create hunting rule

Win.Malware.Deepscan-10028866-0
Create hunting rule

ditekSHen.MALWARE.Win.Trojan.AsyncRAT.UNOFFICIAL
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ditekSHen.MALWARE.Win.XWorm.UNOFFICIAL
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Verdict:
Malicious
Score:
99.9%
Link:
https://cyber-fortress.com/docs/result/index.php?id=6706f002ab31793a7b212f7d
Tags:
Dropper Xworm Remo
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
anti-vm asyncrat backdoor cmd explorer fingerprint lolbin rat schtasks vbnet
Link:
https://www.filescan.io/uploads/6706f0004d903f1f7eef8a46/reports/c1378940-ee9e-4238-a650-c4f4c2c740bb/overview
Verdict:
Malicious
Labled as:
Dacic.4222.Generic
Link:
https://www.hybrid-analysis.com/sample/b387fc76f390a2760a5242693419f051f17a3071fd9c75ca5b9968c5253edfcf
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/c79be363-7d58-4459-9f6c-93a324d0c319
Result
Threat name:
XWorm
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1530276
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
AI detected suspicious sample
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 many ports of the same IP (likely port scanning)
Contains functionality to check if a debugger is running (CheckRemoteDebuggerPresent)
Found malware configuration
Loading BitLocker PowerShell Module
Machine Learning detection for dropped file
Machine Learning detection for sample
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
Suricata IDS alerts for network traffic
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 Generic Downloader
Yara detected XWorm
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1530276 Sample: 432mtXKD3l.exe Startdate: 09/10/2024 Architecture: WINDOWS Score: 100 43 wednesday-knight.gl.at.ply.gg 2->43 45 ip-api.com 2->45 47 i.ibb.co 2->47 55 Suricata IDS alerts for network traffic 2->55 57 Found malware configuration 2->57 59 Malicious sample detected (through community Yara rule) 2->59 61 14 other signatures 2->61 8 432mtXKD3l.exe 15 7 2->8         started        13 432mtXKD3l.exe 2->13         started        15 432mtXKD3l.exe 2->15         started        17 2 other processes 2->17 signatures3 process4 dnsIp5 49 ip-api.com 208.95.112.1, 49706, 80 TUT-ASUS United States 8->49 51 wednesday-knight.gl.at.ply.gg 147.185.221.22, 48312, 64437, 64450 SALSGIVERUS United States 8->51 53 i.ibb.co 162.19.58.156, 443, 64439, 64440 CENTURYLINK-US-LEGACY-QWESTUS United States 8->53 37 C:\Users\user\AppData\...\432mtXKD3l.exe, PE32 8->37 dropped 65 Protects its processes via BreakOnTermination flag 8->65 67 Bypasses PowerShell execution policy 8->67 69 Tries to detect sandboxes and other dynamic analysis tools (process name or module or function) 8->69 77 3 other signatures 8->77 19 powershell.exe 23 8->19         started        22 powershell.exe 23 8->22         started        24 powershell.exe 23 8->24         started        26 2 other processes 8->26 39 C:\Users\user\AppData\...\432mtXKD3l.exe.log, CSV 13->39 dropped 71 Antivirus detection for dropped file 13->71 73 Multi AV Scanner detection for dropped file 13->73 75 Machine Learning detection for dropped file 13->75 file6 signatures7 process8 file9 63 Loading BitLocker PowerShell Module 19->63 29 conhost.exe 19->29         started        31 conhost.exe 22->31         started        33 conhost.exe 24->33         started        41 C:\ProgramData\Microsoft\...\Report.wer, Unicode 26->41 dropped 35 conhost.exe 26->35         started        signatures10 process11
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/b387fc76f390a2760a5242693419f051f17a3071fd9c75ca5b9968c5253edfcf
Detection:
shortloader
Create hunting rule
Link:
https://mwdb.cert.pl/sample/b387fc76f390a2760a5242693419f051f17a3071fd9c75ca5b9968c5253edfcf/
Threat name:
ByteCode-MSIL.Spyware.AsyncRAT
Create hunting rule
Status:
Malicious
First seen:
2024-10-09 21:05:06 UTC
File Type:
PE (.Net Exe)
Extracted files:
1
AV detection:
22 of 24 (91.67%)
Threat level:
  2/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=wod7y5xtscrhmcssijutigpqkhyxumdr7wohlss3tfumkjj637hq._file
Verdict:
malicious
Label(s):
xworm
Create hunting rule
Similar samples:
1f204b43acfdf5d1088f37b2159d98d5500bdaeec99cd3f0d6e8ceb77282351b
Formbook
69a3929ef1219159e606fb0b5f66c37baeea26e69a0e544f113d0102e38505e1
Formbook
87189ae08967742a49ed5e98fc5731af9fa843b4bde08151ac5d16a71f0052f6
Formbook
8dc0ce77162bd62f1c4aa4108d2f82a3ab64e99b23b6d369a9f8e884b1e7b8c4
Formbook
b387fc76f390a2760a5242693419f051f17a3071fd9c75ca5b9968c5253edfcf
Formbook
error
Formbook
fd15b9b162dcbe4f16157d4b13f69a6b2ede55fcd5ddb2a19bce8eb68a363e43
Formbook
+ 892 additional samples on MalwareBazaar
Result
Malware family:
xworm
Create hunting rule
Score:
  10/10
Tags:
family:xworm rat trojan
Link:
https://tria.ge/reports/241009-zw52hsycke/
Behaviour
Suspicious use of AdjustPrivilegeToken
Looks up external IP address via web service
Detect Xworm Payload
Xworm
Malware Config
C2 Extraction:
wednesday-knight.gl.at.ply.gg:48312
0xF488F3FA5541d79f0b1945ccA834cD6d939dD864:1
Verdict:
Malicious
Tags:
rat xworm asyncrat asyncrat
YARA:
EXE_RAT_XWorm_April2024 MALWARE_Win_XWorm
Link:
https://app.threat.zone/submission/751a973a-743e-4d27-ad25-5fe8a1fee3ea
Unpacked files
SH256 hash:
b387fc76f390a2760a5242693419f051f17a3071fd9c75ca5b9968c5253edfcf
MD5 hash:
20ec0ec5f396bf72a91e5943fe426224
SHA1 hash:
f54cc47328f60dea7788687656992eca18336ae0
Detections:
PureCrypter_Stage1
Create hunting rule
win_xworm_w0
Create hunting rule
MALWARE_Win_XWorm
Create hunting rule
INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
Create hunting rule
MALWARE_Win_AsyncRAT
Create hunting rule
Link:
https://www.unpac.me/results/95dcc7bc-317f-4b49-b492-304718eaf968/
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/b387fc76f390a2760a5242693419f051f17a3071fd9c75ca5b9968c5253edfcf

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:DebuggerCheck__RemoteAPI
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:Detect_PowerShell_Obfuscation
Create hunting rule
Author:daniyyell
Description:Detects obfuscated PowerShell commands commonly used in malicious scripts.
Rule name:Disable_Defender
Create hunting rule
Author:iam-py-test
Description:Detect files disabling or modifying Windows Defender, Windows Firewall, or Microsoft Smartscreen
Rule name:EXE_RAT_XWorm_April2024
Create hunting rule
Author:Yashraj Solanki - Cyber Threat Intelligence Analyst at Bridewell
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: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: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

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 (HIGH_ENTROPY_VA)high

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