MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 49f8c46a38d820ce77735d2787c03264ef3da16ff40167353610249ddf9717be. 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: 16


Intelligence 16 IOCs YARA 7 File information Comments
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SHA256 hash: 49f8c46a38d820ce77735d2787c03264ef3da16ff40167353610249ddf9717be
SHA3-384 hash: 4eda01148efec1eaa149cca3357661a982f7385615c409b84c929fedd12546bd5dfccde27c50e4cde869e9d00811cabf
SHA1 hash: e206a8617423eaa24b434cabbb036ad682afe813
MD5 hash: 97a41deb44fe0a4888bbaa3b74c2f0d9
humanhash: bakerloo-kansas-robin-low
File name:49f8c46a38d820ce77735d2787c03264ef3da16ff40167353610249ddf9717be
Download: download sample
Signature Formbook
Create hunting rule
File size:713'216 bytes
First seen:2025-05-09 12:53:18 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'663 x AgentTesla, 19'478 x Formbook, 12'208 x SnakeKeylogger)
ssdeep 12288:SR6gCRxkznTPEWmrhIatU53rofmb544GlteVUbv8mLwlydcrKfOQy:SRXT5QhntUproObQltpv8mLwlTm
Threatray 3 similar samples on MalwareBazaar
TLSH T1DDE41204265AEB23C4A117F21A72D2741738EE8DA564D70BAFE67DDFB166B482884343
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 adrian__luca
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
1
# of downloads :
326
Origin country :
HU HU
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
49f8c46a38d820ce77735d2787c03264ef3da16ff40167353610249ddf9717be
Verdict:
Suspicious activity
Analysis date:
2025-05-09 15:50:24 UTC
Tags:
netreactor
Link:
https://app.any.run/tasks/c2c8f80f-f9f5-4aa7-b82d-ab2cde7245f3

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
SecuriteInfo.com.BackDoor.AgentTeslaNET.19.30127.29584.UNOFFICIAL
Create hunting rule

Verdict:
Malicious
Score:
96.5%
Link:
https://cyber-fortress.com/docs/result/index.php?id=681dfcf2e16384d6a7034459
Tags:
virus spawn 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
Unauthorized injection to a recently created process
Restart of the analyzed sample
Creating a file
Adding an exclusion to Microsoft Defender
Enabling autorun by creating a file
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
explorer lolbin obfuscated packed packed packer_detected vbnet
Link:
https://www.filescan.io/uploads/681dfb080b64e174c41fa99d/reports/f5b4e434-ae89-4d03-b0ec-3f80ae2b38e9/overview
Verdict:
Malicious
Labled as:
Trojan.Generic
Link:
https://www.hybrid-analysis.com/sample/49f8c46a38d820ce77735d2787c03264ef3da16ff40167353610249ddf9717be
Malware family:
Formbook
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/57b16df2-289e-4548-8ffd-32ddcf4e7777
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1685417
Signature
.NET source code contains potential unpacker
Adds a directory exclusion to Windows Defender
Antivirus detection for URL or domain
Found direct / indirect Syscall (likely to bypass EDR)
Injects a PE file into a foreign processes
Joe Sandbox ML detected suspicious sample
Loading BitLocker PowerShell Module
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)
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 harvest and steal browser information (history, passwords, etc)
Tries to steal Mail credentials (via file / registry access)
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: 1685417 Sample: X89Qu4Vwzl.exe Startdate: 09/05/2025 Architecture: WINDOWS Score: 100 59 www.zeniost.xyz 2->59 61 www.wetransfer.com 2->61 63 11 other IPs or domains 2->63 75 Antivirus detection for URL or domain 2->75 77 Sigma detected: Scheduled temp file as task from temp location 2->77 79 Multi AV Scanner detection for submitted file 2->79 83 5 other signatures 2->83 10 X89Qu4Vwzl.exe 7 2->10         started        14 NcjtvJCEFKx.exe 5 2->14         started        signatures3 81 Performs DNS queries to domains with low reputation 59->81 process4 file5 51 C:\Users\user\AppData\...51cjtvJCEFKx.exe, PE32 10->51 dropped 53 C:\Users\...53cjtvJCEFKx.exe:Zone.Identifier, ASCII 10->53 dropped 55 C:\Users\user\AppData\Local\Temp\tmp31A.tmp, XML 10->55 dropped 57 C:\Users\user\AppData\...\X89Qu4Vwzl.exe.log, ASCII 10->57 dropped 93 Uses schtasks.exe or at.exe to add and modify task schedules 10->93 95 Adds a directory exclusion to Windows Defender 10->95 97 Injects a PE file into a foreign processes 10->97 16 X89Qu4Vwzl.exe 10->16         started        19 powershell.exe 23 10->19         started        21 powershell.exe 23 10->21         started        23 schtasks.exe 1 10->23         started        99 Multi AV Scanner detection for dropped file 14->99 25 schtasks.exe 1 14->25         started        27 NcjtvJCEFKx.exe 14->27         started        signatures6 process7 signatures8 71 Maps a DLL or memory area into another process 16->71 29 3xW4h9Ge.exe 16->29 injected 73 Loading BitLocker PowerShell Module 19->73 32 WmiPrvSE.exe 19->32         started        34 conhost.exe 19->34         started        36 conhost.exe 21->36         started        38 conhost.exe 23->38         started        40 conhost.exe 25->40         started        process9 signatures10 101 Found direct / indirect Syscall (likely to bypass EDR) 29->101 42 attrib.exe 13 29->42         started        process11 signatures12 85 Tries to steal Mail credentials (via file / registry access) 42->85 87 Tries to harvest and steal browser information (history, passwords, etc) 42->87 89 Modifies the context of a thread in another process (thread injection) 42->89 91 3 other signatures 42->91 45 3xW4h9Ge.exe 42->45 injected 49 firefox.exe 42->49         started        process13 dnsIp14 65 celadonassn.net 84.32.84.32, 49702, 49703, 49704 NTT-LT-ASLT Lithuania 45->65 67 www.wetransfer.com 18.164.174.20, 49714, 49715, 49716 MIT-GATEWAYSUS United States 45->67 69 4 other IPs or domains 45->69 103 Found direct / indirect Syscall (likely to bypass EDR) 45->103 signatures15
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/49f8c46a38d820ce77735d2787c03264ef3da16ff40167353610249ddf9717be
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/49f8c46a38d820ce77735d2787c03264ef3da16ff40167353610249ddf9717be/
Threat name:
ByteCode-MSIL.Backdoor.FormBook
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Status:
Malicious
First seen:
2025-04-17 07:30:20 UTC
File Type:
PE (.Net Exe)
Extracted files:
8
AV detection:
27 of 37 (72.97%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=jh4mi2ry3aqm453tlutypqbsmtxt3ilp6qawonjwcasj3x4xc67a._file
Verdict:
malicious
Label(s):
formbook
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unc_loader_037
Create hunting rule
Similar samples:
49f8c46a38d820ce77735d2787c03264ef3da16ff40167353610249ddf9717be
Formbook
6d0a73c255453a2539a63dbeae565abae36b527cd6154691b3c066f3815860ed
Formbook
error
Formbook
Result
Malware family:
n/a
Score:
  8/10
Tags:
discovery execution
Link:
https://tria.ge/reports/250509-p4s2tavry2/
Behaviour
Scheduled Task/Job: Scheduled Task
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Program crash
System Location Discovery: System Language Discovery
Suspicious use of SetThreadContext
Checks computer location settings
Command and Scripting Interpreter: PowerShell
Verdict:
Malicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/d776c24e-7f54-41e9-a7ac-621a7ddefbed
Unpacked files
SH256 hash:
49f8c46a38d820ce77735d2787c03264ef3da16ff40167353610249ddf9717be
MD5 hash:
97a41deb44fe0a4888bbaa3b74c2f0d9
SHA1 hash:
e206a8617423eaa24b434cabbb036ad682afe813
Link:
https://www.unpac.me/results/d2d8aec4-9b90-47ff-8988-d715e178bf7c/
SH256 hash:
4dbc0362acd0d36305261a3c0cfa68b90a2d23b2bc2594e1f2aab11f553a6358
MD5 hash:
348a3448b52b5fae915e7a43323c7b92
SHA1 hash:
16ae4361891ad9078f1a575a8778b98eff07293a
Detections:
SUSP_OBF_NET_Reactor_Indicators_Jan24
Create hunting rule
Link:
https://www.unpac.me/results/d2d8aec4-9b90-47ff-8988-d715e178bf7c/
SH256 hash:
07441ec8bd5528b80240c9339157cfeba8dd47c9a588db053b787aa99da92da3
MD5 hash:
e8a5e66e4cca6bedbcd611c5f1e62bd3
SHA1 hash:
a1d43d762203c2297d69ff423e8bd48b0bc9cbda
Link:
https://www.unpac.me/results/d2d8aec4-9b90-47ff-8988-d715e178bf7c/
SH256 hash:
c6e948ecf2f513aece4e2f72eb0c1e3104a79f1cbdd199d90e4c7a33b85c5382
MD5 hash:
96f157d942f512ab04b54c772e8fe104
SHA1 hash:
ba1337eda843af1f695586f814e1ca84ba06e7b7
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/d2d8aec4-9b90-47ff-8988-d715e178bf7c/
SH256 hash:
703456117b30027e9591b8fc15eb9a5ba28486739ce766abd71b32d005117376
MD5 hash:
dbad48cdcc584705b44814762ae1bad0
SHA1 hash:
7cb2018625c9e5541833ec5372c669c491d1dab7
Link:
https://www.unpac.me/results/d2d8aec4-9b90-47ff-8988-d715e178bf7c/
Malware family:
FormBook
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/49f8c46a38d8/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/49f8c46a38d820ce77735d2787c03264ef3da16ff40167353610249ddf9717be

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: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:shellcode
Create hunting rule
Author:nex
Description:Matched shellcode byte patterns
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.

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

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