MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 439e270481fa6cf85666be16e0f41dcbf80e2515b304573591528a1cfa3d9758. 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: 20


Intelligence 20 IOCs YARA 5 File information Comments
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SHA256 hash: 439e270481fa6cf85666be16e0f41dcbf80e2515b304573591528a1cfa3d9758
SHA3-384 hash: 93a0f5acf6ae44d71e1f3141cba97f91ed84eee44eacd4cbebccc01b6fc4991122cab1a3e4b5e3eb45a33b257abdbd77
SHA1 hash: fb49e10c82891b2c6ac90acc2c0a1d4463485953
MD5 hash: 21439ea18c8518ed0f7e3b94551df520
humanhash: bakerloo-harry-beer-high
File name:E-dekont.pdf.exe
Download: download sample
Signature Formbook
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File size:671'744 bytes
First seen:2025-03-25 16:44:09 UTC
Last seen:2025-04-08 08:22:47 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'666 x AgentTesla, 19'479 x Formbook, 12'209 x SnakeKeylogger)
ssdeep 12288:xdkIYyOn6nzxmLvraF2UBmNRURd+bSuhh2oDywXlw62C9ygXCw+eAix5I:fY9n6nmv1UBmNmRQbSs2oGYrSBNs6
Threatray 1 similar samples on MalwareBazaar
TLSH T1F2E40158670CE203CA958B755A71F6B513BC1EDEE902D30B9FDDADEBB466B010C04297
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 abuse_ch
Tags:exe FormBook geo TUR

Intelligence

File Origin
# of uploads :
3
# of downloads :
455
Origin country :
NL NL
Vendor Threat Intelligence
Malware family:
formbook
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ID:
1
File name:
69ef570f3f76fde8f590923f23a9b663d4d5bbc10b76c391c96ebdad0435f906
Verdict:
Malicious activity
Analysis date:
2025-03-25 12:21:45 UTC
Tags:
arch-exec formbook stealer xloader
Link:
https://app.any.run/tasks/d1d1462c-3473-4af0-a8d2-2318cfde9c94

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
SecuriteInfo.com.Trojan.PackedNET.3285.8173.15615.UNOFFICIAL
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Verdict:
Malicious
Score:
99.1%
Link:
https://cyber-fortress.com/docs/result/index.php?id=67e29fd9bb84e066269efcf8
Tags:
underscore spawn shell virus
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Сreating synchronization primitives
Creating a process with a hidden window
Unauthorized injection to a recently created process
Restart of the analyzed sample
Creating a file
Launching a process
Launching cmd.exe command interpreter
Setting browser functions hooks
Adding an exclusion to Microsoft Defender
Unauthorized injection to a system process
Unauthorized injection to a browser process
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
masquerade obfuscated packed packed packer_detected
Link:
https://www.filescan.io/uploads/67e2dd746a150b67eec6428f/reports/c9617696-3ff6-4336-b896-bee557667491/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
Link:
https://www.hybrid-analysis.com/sample/439e270481fa6cf85666be16e0f41dcbf80e2515b304573591528a1cfa3d9758
Result
Verdict:
MALICIOUS
Malware family:
Formbook
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Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/fc966591-93e2-4adc-a50e-b64924184f05
Result
Threat name:
FormBook
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Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1648280
Signature
.NET source code contains potential unpacker
Adds a directory exclusion to Windows Defender
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Found direct / indirect Syscall (likely to bypass EDR)
Found malware configuration
Initial sample is a PE file and has a suspicious name
Joe Sandbox ML detected suspicious sample
Loading BitLocker PowerShell Module
Malicious sample detected (through community Yara rule)
Maps a DLL or memory area into another process
Modifies the context of a thread in another process (thread injection)
Modifies the prolog of user mode functions (user mode inline hooks)
Multi AV Scanner detection for submitted file
Performs DNS queries to domains with low reputation
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
Sigma detected: Powershell Base64 Encoded MpPreference Cmdlet
Sigma detected: Suspicious Double Extension File Execution
Switches to a custom stack to bypass stack traces
Tries to detect virtualization through RDTSC time measurements
Uses an obfuscated file name to hide its real file extension (double extension)
Uses netstat to query active network connections and open ports
Yara detected AntiVM3
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1648280 Sample: E-dekont.pdf.exe Startdate: 25/03/2025 Architecture: WINDOWS Score: 100 40 www.uaizhan.xyz 2->40 42 www.ureformula.shop 2->42 44 4 other IPs or domains 2->44 60 Found malware configuration 2->60 62 Malicious sample detected (through community Yara rule) 2->62 64 Antivirus detection for URL or domain 2->64 68 11 other signatures 2->68 11 E-dekont.pdf.exe 4 2->11         started        15 svchost.exe 1 1 2->15         started        signatures3 66 Performs DNS queries to domains with low reputation 40->66 process4 dnsIp5 38 C:\Users\user\...-dekont.pdf.exe.log, ASCII 11->38 dropped 72 Adds a directory exclusion to Windows Defender 11->72 74 Tries to detect virtualization through RDTSC time measurements 11->74 76 Switches to a custom stack to bypass stack traces 11->76 18 E-dekont.pdf.exe 11->18         started        21 powershell.exe 22 11->21         started        48 127.0.0.1 unknown unknown 15->48 file6 signatures7 process8 signatures9 50 Modifies the context of a thread in another process (thread injection) 18->50 52 Maps a DLL or memory area into another process 18->52 54 Sample uses process hollowing technique 18->54 58 2 other signatures 18->58 23 explorer.exe 30 1 18->23 injected 56 Loading BitLocker PowerShell Module 21->56 27 WmiPrvSE.exe 21->27         started        29 conhost.exe 21->29         started        process10 dnsIp11 46 204.79.197.203, 443, 80 MICROSOFT-CORP-MSN-AS-BLOCKUS United States 23->46 70 Uses netstat to query active network connections and open ports 23->70 31 NETSTAT.EXE 23->31         started        signatures12 process13 signatures14 78 Modifies the context of a thread in another process (thread injection) 31->78 80 Maps a DLL or memory area into another process 31->80 82 Tries to detect virtualization through RDTSC time measurements 31->82 84 Switches to a custom stack to bypass stack traces 31->84 34 cmd.exe 1 31->34         started        process15 process16 36 conhost.exe 34->36         started       
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/439e270481fa6cf85666be16e0f41dcbf80e2515b304573591528a1cfa3d9758
Detection:
formbook
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Link:
https://mwdb.cert.pl/sample/439e270481fa6cf85666be16e0f41dcbf80e2515b304573591528a1cfa3d9758/
Threat name:
ByteCode-MSIL.Backdoor.FormBook
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Status:
Malicious
First seen:
2025-03-25 12:59:08 UTC
File Type:
PE (.Net Exe)
Extracted files:
8
AV detection:
25 of 36 (69.44%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=iopcobeb7jwpqvtgxylob5a5zp4a4jivwmcfonmrkkfbz6r5s5ma._file
Verdict:
malicious
Label(s):
formbook
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unc_loader_037
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Similar samples:
error
Formbook
Result
Malware family:
formbook
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Score:
  10/10
Tags:
family:formbook campaign:m13o discovery execution rat spyware stealer trojan
Link:
https://tria.ge/reports/250325-t82xqsspy9/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of UnmapMainImage
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
System Location Discovery: System Language Discovery
Suspicious use of SetThreadContext
Checks computer location settings
Deletes itself
Command and Scripting Interpreter: PowerShell
Formbook payload
Formbook
Formbook family
Verdict:
Malicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/c54ecc8a-7a86-4153-8a2d-b67d2c330915
Unpacked files
SH256 hash:
bbac028c0470bfe98177dde3bbd82b48a316a992fb51797a79e1aca9064bfb9f
MD5 hash:
2e794cc77833e2e5f4a8514a9014e5e8
SHA1 hash:
288d60c2f36ce703122034fec75f56096595a629
Link:
https://www.unpac.me/results/0657e4da-b424-407b-980e-2e4d3279429a/
SH256 hash:
ad29b088d1f756dc97d7c8a5f7b30f3884312abce1ed207bbf2a8bca8f63caaf
MD5 hash:
17b0a5ab62b87c9778fd5b36cef748c8
SHA1 hash:
d75fc1f30db4ae48d9a58903a2357e276f3c0fec
Detections:
SUSP_OBF_NET_ConfuserEx_Name_Pattern_Jan24
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SUSP_OBF_NET_Reactor_Indicators_Jan24
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Link:
https://www.unpac.me/results/0657e4da-b424-407b-980e-2e4d3279429a/
SH256 hash:
9bb95fcf7dfd0852612dd070707d64f3d5c07d43a25fa637b8887f831c933bc0
MD5 hash:
8a10c1f7a85da013ae7a70dc499cf59a
SHA1 hash:
b15e28f226cce514e0bcb7457552d21e5a3dcde4
Detections:
win_formbook_w0
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win_formbook_g0
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win_formbook_auto
Create hunting rule
FormBook
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Windows_Trojan_Formbook
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Formbook
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Link:
https://www.unpac.me/results/0657e4da-b424-407b-980e-2e4d3279429a/
Parent samples :
1813e0f9ae87ebcdbdd10834c3fa6a57cd3192c62fa4a35e16a201f4c6d48dd7
97b825e713db39ad07e6dcd7ed37ef80379f2838f8c89df538b942c15c4bfc2a
3fbcec3b7e1d2b8efef9e2ab1be54a55e2252166cd357fc2ee9cb42581851365
439e270481fa6cf85666be16e0f41dcbf80e2515b304573591528a1cfa3d9758
dda1b2cf6d02fd22ce9bdeac8a3a6e6ff669928524a2ec4af673bfe1c75ae690
SH256 hash:
439e270481fa6cf85666be16e0f41dcbf80e2515b304573591528a1cfa3d9758
MD5 hash:
21439ea18c8518ed0f7e3b94551df520
SHA1 hash:
fb49e10c82891b2c6ac90acc2c0a1d4463485953
Link:
https://www.unpac.me/results/0657e4da-b424-407b-980e-2e4d3279429a/
Malware family:
FormBook
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/439e270481fa/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/439e270481fa6cf85666be16e0f41dcbf80e2515b304573591528a1cfa3d9758

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:AgentTesla_DIFF_Common_Strings_01
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Author:schmidtsz
Description:Identify partial Agent Tesla strings
Rule name:NET
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Author:malware-lu
Rule name:pe_imphash
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Rule name:Skystars_Malware_Imphash
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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.

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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