MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 d853825ca0a839c07cb0b00a5d2a418058fa2ba649cce517ed569a566f205ca2. 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 15 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: d853825ca0a839c07cb0b00a5d2a418058fa2ba649cce517ed569a566f205ca2
SHA3-384 hash: ed3f4eb4d5bd18c074c96516e8338fbfe5b7652a23033b01bf5115a31c5c5c560488b163751232c9aba8843c265ee664
SHA1 hash: 6a6b269382f570ae78b28f2d85b209fd4a1cb3ed
MD5 hash: df363cebacd23ac839ef11a3689e0a5e
humanhash: one-saturn-hamper-single
File name:yj0y2yTkeKCSdVk.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:824'320 bytes
First seen:2025-02-24 13:03:52 UTC
Last seen:2025-03-10 11:45:41 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'744 x AgentTesla, 19'611 x Formbook, 12'242 x SnakeKeylogger)
ssdeep 12288:fNLvsJ6YeXY/e1h3Rb35T9UkAdTtXco/rLYcTTj/S/b0p13PUMil2cH:Fjfh35J5AN5PvYqj/K4tilNH
TLSH T15505DF041398CA0AD03B67B859B4C1714FB96E6EF922D3164ED4BCEB7EB6B009D52347
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 cocaman
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
3
# of downloads :
40
Origin country :
Vendor Threat Intelligence
Malware family:
formbook
Create hunting rule
ID:
1
File name:
4b1997dea1f366e3cb3a64867f0e478e85613827128da935efe1062e44b6e9cb.zip
Verdict:
Malicious activity
Analysis date:
2025-02-25 02:29:30 UTC
Tags:
arch-exec formbook stealer xloader
Link:
https://app.any.run/tasks/29e96135-ad02-462d-a1e9-2e75b8fbd09a

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Verdict:
Malicious
Score:
99.9%
Link:
https://cyber-fortress.com/docs/result/index.php?id=67bc6e4d28ab76d43a5cdff7
Tags:
smarts shell micro
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 cmd.exe command interpreter
Setting browser functions hooks
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 obfuscated packed packed packer_detected vbnet
Link:
https://www.filescan.io/uploads/67bc6e563afc3763bec3cdd1/reports/64bd2c72-a0f7-4eca-b34b-c642091a7cc0/overview
Verdict:
Malicious
Labled as:
Genie.8DN.Generic
Link:
https://www.hybrid-analysis.com/sample/d853825ca0a839c07cb0b00a5d2a418058fa2ba649cce517ed569a566f205ca2
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:
Formbook
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/6ca5bb71-0048-4f17-bd63-98aefd070a77
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1622725
Signature
.NET source code contains potential unpacker
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 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 ipconfig to lookup or modify the Windows network settings
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: 1622725 Sample: yj0y2yTkeKCSdVk.exe Startdate: 24/02/2025 Architecture: WINDOWS Score: 100 60 www.y009.xyz 2->60 62 www.skpmypqxn.xyz 2->62 64 9 other IPs or domains 2->64 84 Found malware configuration 2->84 86 Malicious sample detected (through community Yara rule) 2->86 88 Antivirus detection for URL or domain 2->88 92 8 other signatures 2->92 11 yj0y2yTkeKCSdVk.exe 7 2->11         started        15 LxwNyaQjxt.exe 5 2->15         started        signatures3 90 Performs DNS queries to domains with low reputation 62->90 process4 file5 52 C:\Users\user\AppData\...\LxwNyaQjxt.exe, PE32 11->52 dropped 54 C:\Users\...\LxwNyaQjxt.exe:Zone.Identifier, ASCII 11->54 dropped 56 C:\Users\user\AppData\Local\...\tmp94A6.tmp, XML 11->56 dropped 58 C:\Users\user\...\yj0y2yTkeKCSdVk.exe.log, ASCII 11->58 dropped 94 Uses schtasks.exe or at.exe to add and modify task schedules 11->94 96 Writes to foreign memory regions 11->96 98 Allocates memory in foreign processes 11->98 104 2 other signatures 11->104 17 RegSvcs.exe 11->17         started        20 RegSvcs.exe 11->20         started        22 powershell.exe 23 11->22         started        28 3 other processes 11->28 100 Multi AV Scanner detection for dropped file 15->100 102 Injects a PE file into a foreign processes 15->102 24 RegSvcs.exe 15->24         started        26 schtasks.exe 15->26         started        signatures6 process7 signatures8 68 Modifies the context of a thread in another process (thread injection) 17->68 70 Maps a DLL or memory area into another process 17->70 72 Sample uses process hollowing technique 17->72 74 Queues an APC in another process (thread injection) 17->74 30 explorer.exe 83 1 17->30 injected 32 ipconfig.exe 17->32         started        76 Uses ipconfig to lookup or modify the Windows network settings 20->76 78 Tries to detect virtualization through RDTSC time measurements 20->78 80 Loading BitLocker PowerShell Module 22->80 35 WmiPrvSE.exe 22->35         started        37 conhost.exe 22->37         started        82 Found direct / indirect Syscall (likely to bypass EDR) 24->82 39 conhost.exe 26->39         started        41 conhost.exe 28->41         started        43 conhost.exe 28->43         started        process9 signatures10 45 wscript.exe 30->45         started        66 Tries to detect virtualization through RDTSC time measurements 32->66 process11 signatures12 106 Modifies the context of a thread in another process (thread injection) 45->106 108 Maps a DLL or memory area into another process 45->108 110 Tries to detect virtualization through RDTSC time measurements 45->110 112 Switches to a custom stack to bypass stack traces 45->112 48 cmd.exe 45->48         started        process13 process14 50 conhost.exe 48->50         started       
Score:
0%
Verdict:
Benign
File Type:
PE
Link:
https://malprob.io/report/d853825ca0a839c07cb0b00a5d2a418058fa2ba649cce517ed569a566f205ca2
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/d853825ca0a839c07cb0b00a5d2a418058fa2ba649cce517ed569a566f205ca2/
Threat name:
Win32.Backdoor.FormBook
Create hunting rule
Status:
Suspicious
First seen:
2025-02-24 11:43:25 UTC
File Type:
PE (.Net Exe)
Extracted files:
13
AV detection:
21 of 24 (87.50%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=3bjyexfava44a7fqwaff2ksbqbmpuk5gjhgokf7nk2nfm3zalsra._file
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/250224-qaywmstm17/
Behaviour
Scheduled Task/Job: Scheduled Task
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
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/f07fc56a-9f4b-43ce-98ec-5ffa382bff36
Unpacked files
SH256 hash:
d853825ca0a839c07cb0b00a5d2a418058fa2ba649cce517ed569a566f205ca2
MD5 hash:
df363cebacd23ac839ef11a3689e0a5e
SHA1 hash:
6a6b269382f570ae78b28f2d85b209fd4a1cb3ed
Link:
https://www.unpac.me/results/b8bd6651-d9c1-4ee7-a658-4a3bccf70577/
SH256 hash:
e80a463e16b14b43e4112cb8f0cb0cf44ff245be592202042373a02b9ea4deb9
MD5 hash:
bbea1aafd0d7058f6f46c8ceff355f96
SHA1 hash:
14ca07073c0a943129823d6532358a55761a203f
Link:
https://www.unpac.me/results/b8bd6651-d9c1-4ee7-a658-4a3bccf70577/
SH256 hash:
b46a36920d307672341bc7213d629003164993eadf6235960b72523d6192f0a2
MD5 hash:
08e743b87da4eb5ae2c497a0a19d0925
SHA1 hash:
587d1d50fce0b9e12e121b8681f83986b984e783
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/b8bd6651-d9c1-4ee7-a658-4a3bccf70577/
SH256 hash:
014af1eeb386d2d55905a3a9e582d070fb7fb04fd6167dfdcf5fe40ef4628035
MD5 hash:
fab7758d7c5b6317d1559d5c06aba0e0
SHA1 hash:
039e53c637bc55803e95e5cb8782120b61f93f0c
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/b8bd6651-d9c1-4ee7-a658-4a3bccf70577/
Parent samples :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 family:
FormBook
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/d853825ca0a8/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/d853825ca0a839c07cb0b00a5d2a418058fa2ba649cce517ed569a566f205ca2

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
Create hunting rule
Author:schmidtsz
Description:Identify partial Agent Tesla strings
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: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 4b1997dea1f366e3cb3a64867f0e478e85613827128da935efe1062e44b6e9cb

Formbook

Executable exe d853825ca0a839c07cb0b00a5d2a418058fa2ba649cce517ed569a566f205ca2

(this sample)

  
Delivery method
Other
  
Dropped by
SHA256 4b1997dea1f366e3cb3a64867f0e478e85613827128da935efe1062e44b6e9cb
  
Dropped by
MD5 f42e374c24c186a20ac06dad1123daea

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
CHECK_TRUST_INFORequires Elevated Execution (Unrestricted:true)high

Comments