MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 9aa38b8cdbf5c14b63df00b2d842417396660e8e0767b3cc381fb3d4ce171c3c. 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: 15


Intelligence 15 IOCs YARA 5 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 9aa38b8cdbf5c14b63df00b2d842417396660e8e0767b3cc381fb3d4ce171c3c
SHA3-384 hash: 5a5ff0c0d0317c43915157d2008ea1c6971bb52dd872463d9059198fa8217ffa8003ca14a13a88d9dacf19d047f8ee3e
SHA1 hash: d97a5b8f1ded66c14288b64714c891a79e0dd38b
MD5 hash: 6c897ff22a09f23ebe5ee7fa3fd6a8ec
humanhash: nevada-oranges-kansas-river
File name:2KPFbREL9wVCq0f.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:870'912 bytes
First seen:2025-02-24 19:11:49 UTC
Last seen:2025-03-10 11:44:13 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'740 x AgentTesla, 19'597 x Formbook, 12'241 x SnakeKeylogger)
ssdeep 24576:qGHcJeld7UKLnGbGarYPRUp0V2w5NG1WqkkVt:/BUFQRUpa15NGlt
TLSH T1B605F1AC6742C503C84A47780973D6F152381E9F5680CA5F5EEC7FEB74B2A1A1E077A2
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 :
51
Origin country :
Vendor Threat Intelligence
Verdict:
Malicious
Score:
96.5%
Link:
https://cyber-fortress.com/docs/result/index.php?id=67bcc49128ab76d43a5ce6a4
Tags:
virus micro msil
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/67bcc4933afc3763bec47669/reports/129eb15e-9bc6-406c-9bbc-ca08db0c6d6b/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
Link:
https://www.hybrid-analysis.com/sample/9aa38b8cdbf5c14b63df00b2d842417396660e8e0767b3cc381fb3d4ce171c3c
Result
Verdict:
UNKNOWN
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/b20628b6-05b3-4139-b54c-1591f8554309
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1623043
Signature
.NET source code contains potential unpacker
Adds a directory exclusion to Windows Defender
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
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
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
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
Yara detected AntiVM3
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1623043 Sample: 2KPFbREL9wVCq0f.exe Startdate: 24/02/2025 Architecture: WINDOWS Score: 100 61 www.evalora.xyz 2->61 63 www.yh.lol 2->63 65 3 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 89 11 other signatures 2->89 11 2KPFbREL9wVCq0f.exe 7 2->11         started        15 DpwesNxnniqj.exe 5 2->15         started        signatures3 87 Performs DNS queries to domains with low reputation 61->87 process4 file5 53 C:\Users\user\AppData\...\DpwesNxnniqj.exe, PE32 11->53 dropped 55 C:\Users\...\DpwesNxnniqj.exe:Zone.Identifier, ASCII 11->55 dropped 57 C:\Users\user\AppData\Local\...\tmp7016.tmp, XML 11->57 dropped 59 C:\Users\user\...\2KPFbREL9wVCq0f.exe.log, ASCII 11->59 dropped 91 Uses schtasks.exe or at.exe to add and modify task schedules 11->91 93 Adds a directory exclusion to Windows Defender 11->93 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        95 Antivirus detection for dropped file 15->95 97 Multi AV Scanner detection for dropped file 15->97 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 37 1 17->30 injected 75 Loading BitLocker PowerShell Module 20->75 34 WmiPrvSE.exe 20->34         started        36 conhost.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.yh.lol 103.249.106.98, 50449, 80 ANCHGLOBAL-AS-APAnchnetAsiaLimitedHK China 30->67 107 System process connects to network (likely due to code injection or exploit) 30->107 44 wscript.exe 30->44         started        47 control.exe 30->47         started        signatures11 process12 signatures13 99 Modifies the context of a thread in another process (thread injection) 44->99 101 Maps a DLL or memory area into another process 44->101 103 Tries to detect virtualization through RDTSC time measurements 44->103 105 Switches to a custom stack to bypass stack traces 44->105 49 cmd.exe 44->49         started        process14 process15 51 conhost.exe 49->51         started       
Score:
99%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/9aa38b8cdbf5c14b63df00b2d842417396660e8e0767b3cc381fb3d4ce171c3c
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/9aa38b8cdbf5c14b63df00b2d842417396660e8e0767b3cc381fb3d4ce171c3c/
Threat name:
Win32.Backdoor.FormBook
Create hunting rule
Status:
Malicious
First seen:
2025-02-24 17:13:56 UTC
File Type:
PE (.Net Exe)
Extracted files:
20
AV detection:
26 of 38 (68.42%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=tkryxdg36xauwy67acznqqsboolgmduoa5t3htbyd6z5jtqxdq6a._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-xwjr6szkz9/
Behaviour
Gathers network information
Modifies registry class
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/f043824a-067b-42d8-be1a-a989967bf4a2
Unpacked files
SH256 hash:
9aa38b8cdbf5c14b63df00b2d842417396660e8e0767b3cc381fb3d4ce171c3c
MD5 hash:
6c897ff22a09f23ebe5ee7fa3fd6a8ec
SHA1 hash:
d97a5b8f1ded66c14288b64714c891a79e0dd38b
Link:
https://www.unpac.me/results/7e88fc48-eaaf-42d3-81b7-2518c430fd92/
SH256 hash:
e80a463e16b14b43e4112cb8f0cb0cf44ff245be592202042373a02b9ea4deb9
MD5 hash:
bbea1aafd0d7058f6f46c8ceff355f96
SHA1 hash:
14ca07073c0a943129823d6532358a55761a203f
Link:
https://www.unpac.me/results/7e88fc48-eaaf-42d3-81b7-2518c430fd92/
SH256 hash:
c641597043bcb9c3237f276e405c2fe9fb430ca6d6d5a53bc7324e60c509e2a6
MD5 hash:
d747ef7a73c3588c5f8a44515db461be
SHA1 hash:
b49ce432b70d5bf5706af261e542b6d5e0d3104c
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/7e88fc48-eaaf-42d3-81b7-2518c430fd92/
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/7e88fc48-eaaf-42d3-81b7-2518c430fd92/
Parent samples :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 family:
FormBook
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/9aa38b8cdbf5/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/9aa38b8cdbf5c14b63df00b2d842417396660e8e0767b3cc381fb3d4ce171c3c

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:NET
Create hunting rule
Author:malware-lu
Rule name:NETexecutableMicrosoft
Create hunting rule
Author:malware-lu
Rule name:pe_imphash
Create hunting rule
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 6002b2f67078e3b29de20928ed40b056d62a30a2b8184458d590e28426f4cd3b

Formbook

Executable exe 9aa38b8cdbf5c14b63df00b2d842417396660e8e0767b3cc381fb3d4ce171c3c

(this sample)

  
Delivery method
Other
  
Dropped by
SHA256 6002b2f67078e3b29de20928ed40b056d62a30a2b8184458d590e28426f4cd3b
  
Dropped by
MD5 5d57ed47fa9cec21f127fc65194ae24f

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