MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b603a586ea389d7ce6ea8b3ae24eb08bbe6c020e341ee32845c6edf868aa9bbd. 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: 19


Intelligence 19 IOCs YARA 5 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: b603a586ea389d7ce6ea8b3ae24eb08bbe6c020e341ee32845c6edf868aa9bbd
SHA3-384 hash: d6416efb2f8b8f9766b9e501310f444cfda5e95b42d0a8bb04e7f6cd9c3fe59c2c17906be1f3da98d19fa4922c1322dd
SHA1 hash: 0d642b37a1fc54a70bc9a5691f237356d7c6034a
MD5 hash: bfd1665c28616f5375c6d12399a56381
humanhash: orange-colorado-enemy-king
File name:Ir7jSGIxNu3nb4p.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:672'768 bytes
First seen:2025-03-11 07:35:43 UTC
Last seen:2025-03-11 11:20:28 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:rF5uc154psL+a9npB90iT/lJT471lIQbpnIIjiiwflESdmYNGGFaYcD/Vay:rF5ubW9pB9tlJTc7IEp7uISd9FoDV
Threatray 4'835 similar samples on MalwareBazaar
TLSH T139E4021876A8AD23E6B616F44E22E37047F57E5CA020E3C98DE5BCDB34E4F106564B27
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 SWIFT

Intelligence

File Origin
# of uploads :
4
# of downloads :
458
Origin country :
CH CH
Vendor Threat Intelligence
Malware family:
formbook
Create hunting rule
ID:
1
File name:
Ir7jSGIxNu3nb4p.exe
Verdict:
Malicious activity
Analysis date:
2025-03-11 08:18:18 UTC
Tags:
formbook stealer xloader
Link:
https://app.any.run/tasks/c2fe606d-77fc-45a3-9b9f-e4e1fba72551

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Verdict:
Malicious
Score:
96.5%
Link:
https://cyber-fortress.com/docs/result/index.php?id=67cfef901f777fe30608dbf1
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
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 packed packed packer_detected
Link:
https://www.filescan.io/uploads/67cfe80e3c5f644bd94cc32d/reports/8d80beff-fb96-4e47-9056-fc984f67ce1e/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
Link:
https://www.hybrid-analysis.com/sample/b603a586ea389d7ce6ea8b3ae24eb08bbe6c020e341ee32845c6edf868aa9bbd
Result
Verdict:
SUSPICIOUS
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/31b4d648-88cb-4e56-b9e7-147e19f9ed5d
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1634966
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)
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 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: 1634966 Sample: Ir7jSGIxNu3nb4p.exe Startdate: 11/03/2025 Architecture: WINDOWS Score: 100 59 www.odesfactory.xyz 2->59 61 www.hiefworthextendfirmbridge.xyz 2->61 63 9 other IPs or domains 2->63 77 Found malware configuration 2->77 79 Malicious sample detected (through community Yara rule) 2->79 81 Antivirus detection for URL or domain 2->81 85 9 other signatures 2->85 11 Ir7jSGIxNu3nb4p.exe 7 2->11         started        15 frPZyJs.exe 5 2->15         started        signatures3 83 Performs DNS queries to domains with low reputation 61->83 process4 file5 51 C:\Users\user\AppData\Roaming\frPZyJs.exe, PE32 11->51 dropped 53 C:\Users\user\...\frPZyJs.exe:Zone.Identifier, ASCII 11->53 dropped 55 C:\Users\user\AppData\Local\...\tmpE210.tmp, XML 11->55 dropped 57 C:\Users\user\...\Ir7jSGIxNu3nb4p.exe.log, ASCII 11->57 dropped 95 Uses schtasks.exe or at.exe to add and modify task schedules 11->95 97 Adds a directory exclusion to Windows Defender 11->97 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        99 Antivirus detection for dropped file 15->99 101 Multi AV Scanner detection for dropped file 15->101 103 Writes to foreign memory regions 15->103 105 2 other signatures 15->105 26 RegSvcs.exe 15->26         started        28 schtasks.exe 15->28         started        signatures6 process7 signatures8 65 Modifies the context of a thread in another process (thread injection) 17->65 67 Maps a DLL or memory area into another process 17->67 69 Sample uses process hollowing technique 17->69 75 2 other signatures 17->75 30 explorer.exe 61 1 17->30 injected 71 Loading BitLocker PowerShell Module 20->71 32 conhost.exe 20->32         started        34 WmiPrvSE.exe 20->34         started        36 conhost.exe 22->36         started        38 conhost.exe 24->38         started        73 Found direct / indirect Syscall (likely to bypass EDR) 26->73 40 conhost.exe 28->40         started        process9 process10 42 cscript.exe 30->42         started        45 systray.exe 30->45         started        signatures11 87 Modifies the context of a thread in another process (thread injection) 42->87 89 Maps a DLL or memory area into another process 42->89 91 Tries to detect virtualization through RDTSC time measurements 42->91 93 Switches to a custom stack to bypass stack traces 42->93 47 cmd.exe 42->47         started        process12 process13 49 conhost.exe 47->49         started       
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/b603a586ea389d7ce6ea8b3ae24eb08bbe6c020e341ee32845c6edf868aa9bbd
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/b603a586ea389d7ce6ea8b3ae24eb08bbe6c020e341ee32845c6edf868aa9bbd/
Threat name:
Win32.Trojan.Masslogger
Create hunting rule
Status:
Malicious
First seen:
2025-03-10 17:36:55 UTC
File Type:
PE (.Net Exe)
Extracted files:
11
AV detection:
27 of 38 (71.05%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=wyb2lbxkhcoxzzxkrm5oetvqro7gyaqogqpogkcfy3w7q2fkto6q._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
unc_loader_037
Create hunting rule
Similar samples:
3f616f7935f4c97239699196e64056b45be53e73d02a0b70e482c886e3a13965
Formbook
7fd19fb3bc8558dba218a1877438cbccb2412baf3e50918b9f2d808591c27280
Formbook
a2c40c36ad82e27b4db35cb35800e6fcd428983434b9bb11b5005e92b353baad
Formbook
b90d30fabfd911bdf2b7d785dee57ffd346019b889601d1411df2872d7d020d5
Formbook
ee118f8e57acfa0e476638a011ed8d6664d1499e1b326180e21e6f9834ea93e0
Formbook
error
Formbook
+ 4'825 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/250311-jfdz4awnv9/
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/5e3256af-22a2-43fe-af5f-0ef76158f86c
Unpacked files
SH256 hash:
b603a586ea389d7ce6ea8b3ae24eb08bbe6c020e341ee32845c6edf868aa9bbd
MD5 hash:
bfd1665c28616f5375c6d12399a56381
SHA1 hash:
0d642b37a1fc54a70bc9a5691f237356d7c6034a
Link:
https://www.unpac.me/results/66044fd0-9f79-4afe-b3be-afd96969bcfb/
SH256 hash:
e7a0c831172fd5ed7c94ba88ed144a74902b96636b7936935b7740955679092a
MD5 hash:
34d634505b97a7544d5b4f26707a4ea4
SHA1 hash:
034c083d6ac2bf5eace75b7e66cb32d411638bf7
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/66044fd0-9f79-4afe-b3be-afd96969bcfb/
SH256 hash:
1ae70e9920316346f39648486fe46b70ea00f90b9595cfc0a78958cee45b9224
MD5 hash:
f0884d03aca538d5f2b208d9aaf7874c
SHA1 hash:
132212e8a27c756ae62d926f6b62c91e226e768a
Detections:
INDICATOR_EXE_Packed_SmartAssembly
Create hunting rule
Link:
https://www.unpac.me/results/66044fd0-9f79-4afe-b3be-afd96969bcfb/
Parent samples :
22d92af6c8a273dc5a9e69e37ccfb5ffe6e7d7f0c7a46ee6b9f7e5cb34402128
4b21d54c412f87e8780f0f50392e66e37b5e09c6c53dd955351e6c87c5edebb8
566100e8280a66cd7a4a6bb2befb399f9c0bedb1206a34103f34d9572ffb5121
c33d06421b59dff8c714160ebc13a76508efdf7df8deec91d77cba760d28257f
d8df7d976d130dcbcd58aaf4c908e42a1e1762c5169cefdbafc2faf87dbf2441
123be687d8f6715d99d4938b20d6e75415197fc6ed50af0e472d13a56fff75fa
4bd5d8dbd871399e808370b9ec7adadc46a28ee4af8a48478b69c391f3236637
1957409295eb6545e767c0f0877fbe7816c63d4c14e5bee3c0465f0c188f9434
3d2d4932b38d1e1d37482e994eba2c33927a90e9452ee52c06b5049cfa96fb58
c68fd2199806868970ba64af5626f4004bd075441b3f8a902153570950689dd1
7c255e1da5023e24d8932926c2bef9335a210eae149d1e5236c92c9b5c89e9bc
810e347b05bec3d24178a9f5330d73d85b67f28c6e5e7d82c254743619dd0d0c
3c65a0c225639d6d04e845f224c754fc393f554eedbc5feb4a3b1b9ca3728c34
794bf10b1774238552364c1395d558a69361f2eec1727fd41f36caefed3aa546
211ea7b9db1647569432f81b6b4eba2664d98abb1a2bbf9adba6ce545868c5bd
f529e6efd5225df558fcde232bcc3ebd0fababcf80c44b200fb847e2448d5e1f
a003b17d8065d71e25b3c612567713e67c54db3dd339e0e4a2e0aa5ffc836094
7fd19fb3bc8558dba218a1877438cbccb2412baf3e50918b9f2d808591c27280
b603a586ea389d7ce6ea8b3ae24eb08bbe6c020e341ee32845c6edf868aa9bbd
52eb6516d6851a1f228abaa42737d19bb97d2aa8f62d92f81f501dd43eb14d1a
e1a0b0280374abcbbd243e3d9b749b9e976354ed259076e238c45cf821e1e35b
e43126516cb07aed914aae46c6619db608a984d878ac57d515e8cfd85e696ad3
c991a3ee832bc707306f68c46786afc17de14163f8d3c757516bac9953ad6f3b
7fc21521b3e61d0555c0c1adb947d9724c8ca61dc9caeef85a110ec46d3b2d5d
3db3650ffeffab84a845715ea1018b331e0fd8bdd619b7cab1d1553074aa31d1
SH256 hash:
12758ec96b1f25fb5e300c9ae98569c3c5b569baa723139ccacc475ab371301c
MD5 hash:
ef9ef67d5a832bfb7cff9fb441ff9a1b
SHA1 hash:
9013556c4afddcc2dfd23997350c0d74aae285fa
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/66044fd0-9f79-4afe-b3be-afd96969bcfb/
Parent samples :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 family:
FormBook
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/b603a586ea38/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/b603a586ea389d7ce6ea8b3ae24eb08bbe6c020e341ee32845c6edf868aa9bbd

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 476ab5f92dcd19d632d4fd46b729ffb5269df447d6cbcd357ce66cd4d779ae0e

Formbook

Executable exe b603a586ea389d7ce6ea8b3ae24eb08bbe6c020e341ee32845c6edf868aa9bbd

(this sample)

  
Delivery method
Other
  
Dropped by
SHA256 476ab5f92dcd19d632d4fd46b729ffb5269df447d6cbcd357ce66cd4d779ae0e
  
Dropped by
MD5 c79fed58ff71921a363e55ac9eceefd6

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