MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 9948ae75550edf04cbad0aa67a427908d5f5dd86bae12998ff9e4debfc28a645. 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: 9948ae75550edf04cbad0aa67a427908d5f5dd86bae12998ff9e4debfc28a645
SHA3-384 hash: f229b54c72b79673ce865dd93168b2c67d48aff0dc1d0838d0e17672c3b8b47af9bbcf5d25102398b59d867bccf5d273
SHA1 hash: eb40be01001791cace6246c363fbb796fff61fc5
MD5 hash: e338ac0420228d826826f9afdb49434d
humanhash: mike-march-monkey-virginia
File name:RWFkOB6dKcCEKNt.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:654'344 bytes
First seen:2025-04-18 10:45:33 UTC
Last seen:2025-05-09 13:04:01 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'740 x AgentTesla, 19'600 x Formbook, 12'241 x SnakeKeylogger)
ssdeep 12288:0/yqIkwVZgZTprxD8yoEGhwVS7raZxhr0AnxzKqOnkkj+S6GjhXmN3i5kXw61GbR:gJIviZfTGhwVSHad4Anxz1GkkaSJIN34
TLSH T182D4124EAFA9E906CF4D153BC11318284231D822F856F7A918E96FDA5C43FD9C84DE87
TrID 69.7% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
10.0% (.EXE) Win64 Executable (generic) (10522/11/4)
6.2% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
4.2% (.EXE) Win32 Executable (generic) (4504/4/1)
1.9% (.EXE) Win16/32 Executable Delphi generic (2072/23)
Magika pebin
dhash icon 0000000000000000 (872 x AgentTesla, 496 x Formbook, 296 x RedLineStealer)
Reporter Anonymous
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
9
# of downloads :
476
Origin country :
PL PL
Vendor Threat Intelligence
Malware family:
formbook
Create hunting rule
ID:
1
File name:
RWFkOB6dKcCEKNt.exe
Verdict:
Malicious activity
Analysis date:
2025-04-18 10:48:23 UTC
Tags:
netreactor formbook stealer xloader
Link:
https://app.any.run/tasks/e87e41c8-ea46-4f1a-bef5-f9500a5ef25c

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
Formbook
Create hunting rule
Link:
https://www.capesandbox.com/analysis/2836/
Detection(s):
SecuriteInfo.com.Win32.MalwareX-gen.19201.30291.UNOFFICIAL
Create hunting rule

Verdict:
Malicious
Score:
97.4%
Link:
https://cyber-fortress.com/docs/result/index.php?id=6802315a280f5f89a0d1358b
Tags:
virus micro msil
Result
Verdict:
Malware
Maliciousness:

Behaviour
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 cmd.exe command interpreter
Setting browser functions hooks
Forced shutdown of a system process
Adding an exclusion to Microsoft Defender
Enabling autorun by creating a file
Unauthorized injection to a system process
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
entropy expired-cert invalid-signature obfuscated obfuscated packed packed packer_detected signed vbnet
Link:
https://www.filescan.io/uploads/68022d76e9c1e257979cc9e4/reports/d912a74d-bff4-4753-9261-d6694de1080d/overview
Verdict:
Malicious
Labled as:
HackTool[Obfuscator]/MSIL.DeepSea
Link:
https://www.hybrid-analysis.com/sample/9948ae75550edf04cbad0aa67a427908d5f5dd86bae12998ff9e4debfc28a645
Malware family:
Formbook
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/0cd4d6ef-9d33-45b2-a9dc-c275adfca9fd
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1668290
Signature
.NET source code contains potential unpacker
.NET source code contains very large array initializations
Adds a directory exclusion to Windows Defender
Allocates memory in foreign processes
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
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)
Modifies the prolog of user mode functions (user mode inline hooks)
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
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 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: 1668290 Sample: RWFkOB6dKcCEKNt.exe Startdate: 18/04/2025 Architecture: WINDOWS Score: 100 64 www.xectgroup.net 2->64 66 www.gsp657.top 2->66 68 3 other IPs or domains 2->68 70 Found malware configuration 2->70 72 Malicious sample detected (through community Yara rule) 2->72 74 Antivirus detection for URL or domain 2->74 76 10 other signatures 2->76 11 RWFkOB6dKcCEKNt.exe 7 2->11         started        15 bbehmlw.exe 5 2->15         started        17 svchost.exe 1 1 2->17         started        signatures3 process4 dnsIp5 54 C:\Users\user\AppData\Roaming\bbehmlw.exe, PE32 11->54 dropped 56 C:\Users\user\...\bbehmlw.exe:Zone.Identifier, ASCII 11->56 dropped 58 C:\Users\user\AppData\Local\...\tmpBA80.tmp, XML 11->58 dropped 60 C:\Users\user\...\RWFkOB6dKcCEKNt.exe.log, ASCII 11->60 dropped 88 Uses schtasks.exe or at.exe to add and modify task schedules 11->88 90 Writes to foreign memory regions 11->90 92 Allocates memory in foreign processes 11->92 94 Adds a directory exclusion to Windows Defender 11->94 20 vbc.exe 11->20         started        23 powershell.exe 22 11->23         started        25 powershell.exe 23 11->25         started        27 schtasks.exe 1 11->27         started        96 Multi AV Scanner detection for dropped file 15->96 98 Injects a PE file into a foreign processes 15->98 29 vbc.exe 15->29         started        31 schtasks.exe 15->31         started        62 127.0.0.1 unknown unknown 17->62 file6 signatures7 process8 signatures9 78 Modifies the context of a thread in another process (thread injection) 20->78 80 Maps a DLL or memory area into another process 20->80 82 Sample uses process hollowing technique 20->82 86 3 other signatures 20->86 33 explorer.exe 27 1 20->33 injected 84 Loading BitLocker PowerShell Module 23->84 35 WmiPrvSE.exe 23->35         started        37 conhost.exe 23->37         started        39 conhost.exe 25->39         started        41 conhost.exe 27->41         started        43 conhost.exe 31->43         started        process10 process11 45 WWAHost.exe 33->45         started        48 cmmon32.exe 33->48         started        signatures12 100 Modifies the context of a thread in another process (thread injection) 45->100 102 Maps a DLL or memory area into another process 45->102 104 Tries to detect virtualization through RDTSC time measurements 45->104 106 Switches to a custom stack to bypass stack traces 45->106 50 cmd.exe 45->50         started        process13 process14 52 conhost.exe 50->52         started       
Score:
99%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/9948ae75550edf04cbad0aa67a427908d5f5dd86bae12998ff9e4debfc28a645
Detection:
formbook
Create hunting rule
Link:
https://mwdb.cert.pl/sample/9948ae75550edf04cbad0aa67a427908d5f5dd86bae12998ff9e4debfc28a645/
Threat name:
Win32.Backdoor.FormBook
Create hunting rule
Status:
Malicious
First seen:
2025-04-18 06:13:52 UTC
File Type:
PE (.Net Exe)
Extracted files:
1
AV detection:
25 of 38 (65.79%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=tfek45kvb3pqjs5nbkthuqtzbdk7lxmgxlqstgh7tzg6x7biuzcq._file
Verdict:
malicious
Label(s):
unc_loader_037
Create hunting rule
formbook
Create hunting rule
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook campaign:hi13 discovery execution rat spyware stealer trojan
Link:
https://tria.ge/reports/250418-mt2j4a1vbw/
Behaviour
Gathers network information
Scheduled Task/Job: Scheduled Task
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
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
Uses the VBS compiler for execution
Command and Scripting Interpreter: PowerShell
Formbook payload
Formbook
Formbook family
Verdict:
Malicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/01117d50-26c3-4663-930b-a08db8f973da
Unpacked files
SH256 hash:
9948ae75550edf04cbad0aa67a427908d5f5dd86bae12998ff9e4debfc28a645
MD5 hash:
e338ac0420228d826826f9afdb49434d
SHA1 hash:
eb40be01001791cace6246c363fbb796fff61fc5
Link:
https://www.unpac.me/results/9bc8eeb1-8b9f-4cbf-886b-efbe7682e44c/
SH256 hash:
37f58e27a297a890e327c1fcab33e87a52b0b8c1f05d495b4af57dfadfbaa57f
MD5 hash:
f93a84cb0edded9e2fb67c53fbaa6765
SHA1 hash:
57625f725b0c306da1cb643948c5da9e74c608c8
Detections:
SUSP_OBF_NET_Reactor_Indicators_Jan24
Create hunting rule
Link:
https://www.unpac.me/results/9bc8eeb1-8b9f-4cbf-886b-efbe7682e44c/
SH256 hash:
a5ddf8992018596a4d198c4b9eb89019eac8f0c189dcfb0319ded3d5bd3c5b5f
MD5 hash:
9cc9e638144c7b9b5c677f112c376752
SHA1 hash:
f1459f9fb14463aca346eaaba24dcae8c565d294
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/9bc8eeb1-8b9f-4cbf-886b-efbe7682e44c/
SH256 hash:
f7b2a1307788383e625f5e97e8b6493d83d3d5dc92e6668b4021089c31f95b60
MD5 hash:
01dee027b928c11106c8eedee12872e5
SHA1 hash:
9688743d5cb6c7d6bf8bc89b32c8336f3f12293d
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/9bc8eeb1-8b9f-4cbf-886b-efbe7682e44c/
Parent samples :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 family:
FormBook
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/9948ae75550e/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/9948ae75550edf04cbad0aa67a427908d5f5dd86bae12998ff9e4debfc28a645

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__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:INDICATOR_KB_CERT_7c1118cbbadc95da3752c46e47a27438
Create hunting rule
Author:ditekSHen
Description:Detects executables signed with stolen, revoked or invalid certificates
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_Digital_Certificate
Create hunting rule
Author:albertzsigovits
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.

Cape
Cape
https://www.capesandbox.com/analysis/2836/

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