MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 54902efb04a961959a6ac354c9c54fa1cd59172ae5f713c3a0bfa30448217af3. 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 14 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 54902efb04a961959a6ac354c9c54fa1cd59172ae5f713c3a0bfa30448217af3
SHA3-384 hash: e3e013647902d1127912cc389dc8dd9283bed337d6923d35d9f13b1ecbd0e1082febdd1b32a929819726cded231258f2
SHA1 hash: 74d4bcf24e053685428671035ffd3ba38a52d908
MD5 hash: 0e195be20bc715959546a04ee38b1ded
humanhash: fix-maryland-johnny-hamper
File name:UkSYZASAwY7B3Kk.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:644'096 bytes
First seen:2025-03-05 14:08:18 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'655 x AgentTesla, 19'464 x Formbook, 12'205 x SnakeKeylogger)
ssdeep 12288:i/f0pm+gvyfvWTZHYSz6zZbHbgvjgwQ8cf9RYA+fJEnfzvpm:aqOTHYLbgvHVcf9OA+Rcrxm
Threatray 4'763 similar samples on MalwareBazaar
TLSH T1DFD4027C2746E42BCE856B351A32F2B4627C1EDDF502C7638FDC7E9BBA25A140D14292
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 0000000000000000 (872 x AgentTesla, 496 x Formbook, 296 x RedLineStealer)
Reporter James_inthe_box
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
1
# of downloads :
443
Origin country :
US US
Vendor Threat Intelligence
Malware family:
formbook
Create hunting rule
ID:
1
File name:
UkSYZASAwY7B3Kk.exe
Verdict:
Malicious activity
Analysis date:
2025-03-05 08:33:41 UTC
Tags:
formbook stealer
Link:
https://app.any.run/tasks/cde89493-97cd-4b04-ab01-73f292bb6d14

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
SecuriteInfo.com.Trojan.PackedNET.3260.14239.22407.UNOFFICIAL
Create hunting rule

Verdict:
Malicious
Score:
96.5%
Link:
https://cyber-fortress.com/docs/result/index.php?id=67c7f6e0c8d04e92a4bf04bf
Tags:
stealer virus word
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
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:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
obfuscated obfuscated packed packed packer_detected vbnet
Link:
https://www.filescan.io/uploads/67c85b0e4a3011c802c83c61/reports/605021f4-d952-42db-8ae9-5989ac77fa06/overview
Verdict:
Malicious
Labled as:
PasswordStealer.Genie.8DN.Generic
Link:
https://www.hybrid-analysis.com/sample/54902efb04a961959a6ac354c9c54fa1cd59172ae5f713c3a0bfa30448217af3
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/baf43f4e-5cd0-4b1e-9174-9b9312a214dc
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1630144
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)
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
Suricata IDS alerts for network traffic
Switches to a custom stack to bypass stack traces
System process connects to network (likely due to code injection or exploit)
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: 1630144 Sample: UkSYZASAwY7B3Kk.exe Startdate: 05/03/2025 Architecture: WINDOWS Score: 100 61 www.uetedit.net 2->61 63 www.skconofdallas.net 2->63 65 4 other IPs or domains 2->65 81 Suricata IDS alerts for network traffic 2->81 83 Found malware configuration 2->83 85 Malicious sample detected (through community Yara rule) 2->85 87 11 other signatures 2->87 11 UkSYZASAwY7B3Kk.exe 7 2->11         started        15 KCIHWynkmwS.exe 5 2->15         started        signatures3 process4 file5 53 C:\Users\user\AppData\...\KCIHWynkmwS.exe, PE32 11->53 dropped 55 C:\Users\...\KCIHWynkmwS.exe:Zone.Identifier, ASCII 11->55 dropped 57 C:\Users\user\AppData\Local\...\tmp60FD.tmp, XML 11->57 dropped 59 C:\Users\user\...\UkSYZASAwY7B3Kk.exe.log, ASCII 11->59 dropped 89 Uses schtasks.exe or at.exe to add and modify task schedules 11->89 91 Writes to foreign memory regions 11->91 93 Allocates memory in foreign processes 11->93 95 Adds a directory exclusion to Windows Defender 11->95 17 RegSvcs.exe 11->17         started        20 powershell.exe 23 11->20         started        22 powershell.exe 23 11->22         started        24 schtasks.exe 1 11->24         started        97 Antivirus detection for dropped file 15->97 99 Multi AV Scanner detection for dropped file 15->99 101 Injects a PE file into a foreign processes 15->101 26 RegSvcs.exe 15->26         started        28 schtasks.exe 15->28         started        signatures6 process7 signatures8 69 Modifies the context of a thread in another process (thread injection) 17->69 71 Maps a DLL or memory area into another process 17->71 73 Sample uses process hollowing technique 17->73 79 2 other signatures 17->79 30 explorer.exe 25 1 17->30 injected 75 Loading BitLocker PowerShell Module 20->75 34 conhost.exe 20->34         started        36 WmiPrvSE.exe 20->36         started        38 conhost.exe 22->38         started        40 conhost.exe 24->40         started        77 Found direct / indirect Syscall (likely to bypass EDR) 26->77 42 conhost.exe 28->42         started        process9 dnsIp10 67 www.rym.net 45.79.19.196, 49974, 80 LINODE-APLinodeLLCUS United States 30->67 111 System process connects to network (likely due to code injection or exploit) 30->111 44 explorer.exe 30->44         started        47 cmmon32.exe 30->47         started        signatures11 process12 signatures13 103 Modifies the context of a thread in another process (thread injection) 44->103 105 Maps a DLL or memory area into another process 44->105 107 Tries to detect virtualization through RDTSC time measurements 44->107 109 Switches to a custom stack to bypass stack traces 44->109 49 cmd.exe 44->49         started        process14 process15 51 conhost.exe 49->51         started       
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/54902efb04a961959a6ac354c9c54fa1cd59172ae5f713c3a0bfa30448217af3
Detection:
formbook
Create hunting rule
Link:
https://mwdb.cert.pl/sample/54902efb04a961959a6ac354c9c54fa1cd59172ae5f713c3a0bfa30448217af3/
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2025-03-05 04:46:06 UTC
File Type:
PE (.Net Exe)
Extracted files:
6
AV detection:
21 of 24 (87.50%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=ksic56yevfqzlgtkynkmtrkpuhgvsfzk4x3rhq5ax6rqisbbplzq._file
Verdict:
malicious
Label(s):
unc_loader_037
Create hunting rule
formbook
Create hunting rule
Similar samples:
2305e7ed7abed240fc572c817b6392c81709f9013ebde8ab7fc745c0cb68825c
Formbook
2dbc649f56dbbc3bc0b958929fd993b6a0dc60513c9cf95c9e577bc71534031c
Formbook
54902efb04a961959a6ac354c9c54fa1cd59172ae5f713c3a0bfa30448217af3
Formbook
87723c1d0c921c43c3e6c8128624e2e473782ee165a964ab675286da78dad694
Formbook
a1e04def7fd209402cfc002db03fb18c9d8694d6707b4201cbaec8ce3303ff53
Formbook
af3cf8969b0fdaa379f685e9c822eb12d92c0b7103743671dcd006346ca6df78
Formbook
b96b39428f0eeea593f2b68faa42e478b315b4e80f937662f5520e98a1ba0f0c
Formbook
+ 4'753 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/250305-rgacaszyhv/
Behaviour
Modifies registry class
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/861f5982-7540-423d-9703-e414ca042f57
Unpacked files
SH256 hash:
54902efb04a961959a6ac354c9c54fa1cd59172ae5f713c3a0bfa30448217af3
MD5 hash:
0e195be20bc715959546a04ee38b1ded
SHA1 hash:
74d4bcf24e053685428671035ffd3ba38a52d908
Link:
https://www.unpac.me/results/eadf783c-bd44-422a-a320-b4eaa24cf082/
SH256 hash:
56fee3eba80848a95629897a4cbd2361cc5264802f5f943070f36b2318352751
MD5 hash:
590dfa533f6df2565dd16280476ba644
SHA1 hash:
4fd53da839e22d647841a299d88aaaeba64ad88f
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/eadf783c-bd44-422a-a320-b4eaa24cf082/
SH256 hash:
ab608bea68aa025f85a499a38b2ba7d1494401b2811b2516e729b6163f55e0a2
MD5 hash:
b3ddb9697f34c56d94f8b2b3d3b9f18b
SHA1 hash:
63a428a65722ce363f9d33b9acccfc890ac31289
Link:
https://www.unpac.me/results/eadf783c-bd44-422a-a320-b4eaa24cf082/
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/eadf783c-bd44-422a-a320-b4eaa24cf082/
Parent samples :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 family:
FormBook
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/54902efb04a9/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/54902efb04a961959a6ac354c9c54fa1cd59172ae5f713c3a0bfa30448217af3

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: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

rar 1ff1725bbd606965f0e37f15d60f0979a280bc05ea1a3fbd70cb8ee9d7031bb0

Formbook

Executable exe 54902efb04a961959a6ac354c9c54fa1cd59172ae5f713c3a0bfa30448217af3

(this sample)

  
Delivery method
Distributed via e-mail attachment
  
Dropped by
SHA256 1ff1725bbd606965f0e37f15d60f0979a280bc05ea1a3fbd70cb8ee9d7031bb0
  
Dropped by
MD5 e643c74601ccdfa409a6577191c2dccc

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