MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 52eb6516d6851a1f228abaa42737d19bb97d2aa8f62d92f81f501dd43eb14d1a. 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 17 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 52eb6516d6851a1f228abaa42737d19bb97d2aa8f62d92f81f501dd43eb14d1a
SHA3-384 hash: 5ac987cd04d29dc3839be0d1d53b35ad329e19a8c6ff28cd74f26778000d614bf8dfeca2a384c1d7464e68b8d954f15e
SHA1 hash: d527be2b50e62096a7f0b6b64b3a1d51aaac3938
MD5 hash: 89a38e00ca255a5f1189bfcd3de2bf91
humanhash: nineteen-vermont-winter-hot
File name:W5ktZCSi6nMefS2.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:679'424 bytes
First seen:2025-03-12 10:33:50 UTC
Last seen:2025-03-12 13:06:01 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'652 x AgentTesla, 19'463 x Formbook, 12'204 x SnakeKeylogger)
ssdeep 12288:HRFzNTyJu5+JZV5DJbuJufSak2n857oDfwOnR9SIXVGV8sZe7P9qFhbHX+/9W/wg:xP2J9pJbuofVbIMoCyo3sAwTb3+Jla
Threatray 4'858 similar samples on MalwareBazaar
TLSH T100E4F1955B08CB17DAAE8BB55564E33213758EABF402E392CEE98CDB3C53B7064051CB
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 34f0d0aa8a86c871 (3 x SnakeKeylogger, 2 x Formbook, 1 x DarkCloud)
Reporter cocaman
Tags:exe FormBook INVOICE

Intelligence

File Origin
# of uploads :
3
# of downloads :
478
Origin country :
CH CH
Vendor Threat Intelligence
Malware family:
formbook
Create hunting rule
ID:
1
File name:
cb8233a4385873c59751628a7ed8196d8bfe0d7f5d5f2b2aa20d9a41eec64dfd
Verdict:
Malicious activity
Analysis date:
2025-03-12 09:55:20 UTC
Tags:
arch-exec formbook stealer xloader
Link:
https://app.any.run/tasks/032c1d47-292f-4b3f-8a5c-2950483029ab

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Verdict:
Malicious
Score:
92.5%
Link:
https://cyber-fortress.com/docs/result/index.php?id=67d15a08dff6bd92190877c9
Tags:
micro shell spawn
Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Creating a window
Сreating synchronization primitives
Creating a process with a hidden window
Creating a file in the %AppData% directory
Enabling the 'hidden' option for recently created files
Adding an access-denied ACE
Creating a file in the %temp% directory
Launching a process
Creating a file
Launching the process to change network settings
Launching cmd.exe command interpreter
Adding an exclusion to Microsoft Defender
Enabling autorun by creating a file
Unauthorized injection to a system process
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
obfuscated packed packed packer_detected vbnet
Link:
https://www.filescan.io/uploads/67d163243c5f644bd94f0198/reports/5e62c298-b743-43c4-a017-0a8e969a449c/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
Link:
https://www.hybrid-analysis.com/sample/52eb6516d6851a1f228abaa42737d19bb97d2aa8f62d92f81f501dd43eb14d1a
Result
Verdict:
SUSPICIOUS
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:
Formbook
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/10c21b76-c596-4e15-94b4-e209a55c7c27
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1636084
Signature
.NET source code contains potential unpacker
Adds a directory exclusion to Windows Defender
Allocates memory in foreign processes
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Found direct / indirect Syscall (likely to bypass EDR)
Found malware configuration
Injects a PE file into a foreign processes
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)
Multi AV Scanner detection for dropped file
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: Scheduled temp file as task from temp location
Switches to a custom stack to bypass stack traces
Tries to detect virtualization through RDTSC time measurements
Uses netstat to query active network connections and open ports
Uses schtasks.exe or at.exe to add and modify task schedules
Writes to foreign memory regions
Yara detected AntiVM3
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1636084 Sample: W5ktZCSi6nMefS2.exe Startdate: 12/03/2025 Architecture: WINDOWS Score: 100 65 www.xpertisechat.xyz 2->65 67 www.oneyiq.xyz 2->67 69 9 other IPs or domains 2->69 73 Found malware configuration 2->73 75 Malicious sample detected (through community Yara rule) 2->75 77 Antivirus detection for URL or domain 2->77 81 9 other signatures 2->81 11 W5ktZCSi6nMefS2.exe 7 2->11         started        15 LwaEejaDuHy.exe 5 2->15         started        17 svchost.exe 2->17         started        signatures3 79 Performs DNS queries to domains with low reputation 67->79 process4 dnsIp5 55 C:\Users\user\AppData\...\LwaEejaDuHy.exe, PE32 11->55 dropped 57 C:\Users\...\LwaEejaDuHy.exe:Zone.Identifier, ASCII 11->57 dropped 59 C:\Users\user\AppData\Local\Temp\tmpD85.tmp, XML 11->59 dropped 61 C:\Users\user\...\W5ktZCSi6nMefS2.exe.log, ASCII 11->61 dropped 95 Uses schtasks.exe or at.exe to add and modify task schedules 11->95 97 Writes to foreign memory regions 11->97 99 Allocates memory in foreign processes 11->99 101 Adds a directory exclusion to Windows Defender 11->101 20 RegSvcs.exe 11->20         started        23 powershell.exe 23 11->23         started        25 powershell.exe 23 11->25         started        27 schtasks.exe 1 11->27         started        103 Antivirus detection for dropped file 15->103 105 Multi AV Scanner detection for dropped file 15->105 107 Injects a PE file into a foreign processes 15->107 29 RegSvcs.exe 15->29         started        31 schtasks.exe 15->31         started        63 127.0.0.1 unknown unknown 17->63 file6 signatures7 process8 signatures9 83 Modifies the context of a thread in another process (thread injection) 20->83 85 Maps a DLL or memory area into another process 20->85 87 Sample uses process hollowing technique 20->87 93 2 other signatures 20->93 33 explorer.exe 62 1 20->33 injected 89 Loading BitLocker PowerShell Module 23->89 36 conhost.exe 23->36         started        38 WmiPrvSE.exe 23->38         started        40 conhost.exe 25->40         started        42 conhost.exe 27->42         started        91 Found direct / indirect Syscall (likely to bypass EDR) 29->91 44 conhost.exe 31->44         started        process10 signatures11 71 Uses netstat to query active network connections and open ports 33->71 46 systray.exe 33->46         started        49 NETSTAT.EXE 33->49         started        process12 signatures13 109 Modifies the context of a thread in another process (thread injection) 46->109 111 Maps a DLL or memory area into another process 46->111 113 Tries to detect virtualization through RDTSC time measurements 46->113 115 Switches to a custom stack to bypass stack traces 46->115 51 cmd.exe 46->51         started        process14 process15 53 conhost.exe 51->53         started       
Score:
99%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/52eb6516d6851a1f228abaa42737d19bb97d2aa8f62d92f81f501dd43eb14d1a
Detection:
formbook
Create hunting rule
Link:
https://mwdb.cert.pl/sample/52eb6516d6851a1f228abaa42737d19bb97d2aa8f62d92f81f501dd43eb14d1a/
Threat name:
Win32.Backdoor.FormBook
Create hunting rule
Status:
Malicious
First seen:
2025-03-12 08:10:08 UTC
File Type:
PE (.Net Exe)
Extracted files:
8
AV detection:
23 of 38 (60.53%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=klvwkfwwqunb6iukxkscon6rto4x2kvi6ywzf6a7kao5ipvrjuna._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
unc_loader_037
Create hunting rule
Similar samples:
12fb27d7a59c168a82317baa0b127b8a826cc98dd108fc37fd022d8a842b06bc
Formbook
792bdecda049100bcddb388c74b9fa5aa21d30a167786f1e5a99091a6e77c430
Formbook
a2c40c36ad82e27b4db35cb35800e6fcd428983434b9bb11b5005e92b353baad
Formbook
b603a586ea389d7ce6ea8b3ae24eb08bbe6c020e341ee32845c6edf868aa9bbd
Formbook
b7def3af905789a4ecedcc226d91592d8bc758ce8c5458d62ef435707de8670f
Formbook
ee118f8e57acfa0e476638a011ed8d6664d1499e1b326180e21e6f9834ea93e0
Formbook
error
Formbook
+ 4'848 additional samples on MalwareBazaar
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook campaign:my18 discovery execution rat spyware stealer trojan
Link:
https://tria.ge/reports/250312-ml5a1syqw9/
Behaviour
Scheduled Task/Job: Scheduled Task
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
Command and Scripting Interpreter: PowerShell
Formbook payload
Formbook
Formbook family
Verdict:
Malicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/24af0e24-fc04-473c-bc00-5a12a84ff598
Unpacked files
SH256 hash:
52eb6516d6851a1f228abaa42737d19bb97d2aa8f62d92f81f501dd43eb14d1a
MD5 hash:
89a38e00ca255a5f1189bfcd3de2bf91
SHA1 hash:
d527be2b50e62096a7f0b6b64b3a1d51aaac3938
Link:
https://www.unpac.me/results/0e1abdf2-8471-461f-9368-0cd3124a979c/
SH256 hash:
1ae70e9920316346f39648486fe46b70ea00f90b9595cfc0a78958cee45b9224
MD5 hash:
f0884d03aca538d5f2b208d9aaf7874c
SHA1 hash:
132212e8a27c756ae62d926f6b62c91e226e768a
Detections:
INDICATOR_EXE_Packed_SmartAssembly
Create hunting rule
Link:
https://www.unpac.me/results/0e1abdf2-8471-461f-9368-0cd3124a979c/
Parent samples :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 hash:
8d24df7659a1233f94bce50bef51ccbd38b6393db448fe397a0084b9bdf55521
MD5 hash:
b05acbc9663509430d6c03f7336d0278
SHA1 hash:
99281092bbc2d33ebc812b335ea57da966c83811
Detections:
SUSP_OBF_NET_ConfuserEx_Name_Pattern_Jan24
Create hunting rule
SUSP_OBF_NET_Reactor_Indicators_Jan24
Create hunting rule
Link:
https://www.unpac.me/results/0e1abdf2-8471-461f-9368-0cd3124a979c/
SH256 hash:
12758ec96b1f25fb5e300c9ae98569c3c5b569baa723139ccacc475ab371301c
MD5 hash:
ef9ef67d5a832bfb7cff9fb441ff9a1b
SHA1 hash:
9013556c4afddcc2dfd23997350c0d74aae285fa
Detections:
win_formbook_w0
Create hunting rule
win_formbook_g0
Create hunting rule
win_formbook_auto
Create hunting rule
FormBook
Create hunting rule
Windows_Trojan_Formbook
Create hunting rule
Formbook
Create hunting rule
Link:
https://www.unpac.me/results/0e1abdf2-8471-461f-9368-0cd3124a979c/
Parent samples :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 family:
FormBook
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/52eb6516d685/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/52eb6516d6851a1f228abaa42737d19bb97d2aa8f62d92f81f501dd43eb14d1a

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:DebuggerCheck__API
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerCheck__GlobalFlags
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerCheck__QueryInfo
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerHiding__Active
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerHiding__Thread
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:golang_bin_JCorn_CSC846
Create hunting rule
Author:Justin Cornwell
Description:CSC-846 Golang detection ruleset
Rule name:MD5_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for MD5 constants
Rule name:NET
Create hunting rule
Author:malware-lu
Rule name:NETexecutableMicrosoft
Create hunting rule
Author:malware-lu
Rule name:pe_detect_tls_callbacks
Create hunting rule
Rule name:pe_imphash
Create hunting rule
Rule name:pe_no_import_table
Create hunting rule
Description:Detect pe file that no import table
Rule name:RIPEMD160_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for RIPEMD-160 constants
Rule name:SEH__vectored
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:SHA1_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for SHA1 constants
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.

Malspam

Formbook

zip cb8233a4385873c59751628a7ed8196d8bfe0d7f5d5f2b2aa20d9a41eec64dfd

Formbook

Executable exe 52eb6516d6851a1f228abaa42737d19bb97d2aa8f62d92f81f501dd43eb14d1a

(this sample)

  
Delivery method
Other
  
Dropped by
SHA256 cb8233a4385873c59751628a7ed8196d8bfe0d7f5d5f2b2aa20d9a41eec64dfd
  
Dropped by
MD5 076bcb443c90aa11a1c9ca9560bf1ee0

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