MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 4f0bc56a7410c540c23d023c4c87dedb2eff27cc12787ba90c9acd5171e3e86a. 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: 18


Intelligence 18 IOCs YARA 5 File information Comments
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SHA256 hash: 4f0bc56a7410c540c23d023c4c87dedb2eff27cc12787ba90c9acd5171e3e86a
SHA3-384 hash: 1463608773dbd9e4a4af7d0a7e622465f05dd273b85ebc5c23c76501fc9ef39ebe4abc0a0bf7e5a2db9d9a1f1d0d39a4
SHA1 hash: 2418f3150fa023554a3f0585b953a38106be6ebd
MD5 hash: 971051fcb62c94b5fc92d3353da71b8a
humanhash: artist-avocado-mango-bravo
File name:proformaXfaturaXXpdf.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:1'336'832 bytes
First seen:2025-03-06 08:14:29 UTC
Last seen:2025-03-06 09:48:21 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'661 x AgentTesla, 19'474 x Formbook, 12'208 x SnakeKeylogger)
ssdeep 24576:sTRERX7RUcWbF/elaPQVTZD185+36J2aoOaX5qT9ISlP81kr/zU:sTORQxelaYVB4y64aoOaX5qiS98WjzU
Threatray 2'343 similar samples on MalwareBazaar
TLSH T115550217B68B85F0C2905B72C4ABC5021774FAA1E663D70E7D8AE3650C333FAD991297
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 lowmal3
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
2
# of downloads :
442
Origin country :
DE DE
Vendor Threat Intelligence
Malware family:
formbook
Create hunting rule
ID:
1
File name:
proformaXfaturaXXpdf.exe
Verdict:
Malicious activity
Analysis date:
2025-03-06 08:28:22 UTC
Tags:
formbook stealer xloader
Link:
https://app.any.run/tasks/889e946d-792c-4036-a03f-a612711829b9

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
SecuriteInfo.com.Win32.CrypterX-gen.27652.18502.UNOFFICIAL
Create hunting rule

Verdict:
Malicious
Score:
93.3%
Link:
https://cyber-fortress.com/docs/result/index.php?id=67c95b88c8d04e92a4bf510c
Tags:
autorun virus
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a file in the %AppData% directory
Unauthorized injection to a recently created process
Restart of the analyzed sample
Creating a process with a hidden window
Launching a process
Сreating synchronization primitives
Launching cmd.exe command interpreter
Setting browser functions hooks
Enabling autorun by creating a file
Unauthorized injection to a system process
Unauthorized injection to a browser process
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
net_reactor obfuscated obfuscated packed packed packer_detected stealer
Link:
https://www.filescan.io/uploads/67c9598c3c5f644bd945c6bc/reports/fe6fdfee-392a-43c4-8158-1be2a5aaf343/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
Link:
https://www.hybrid-analysis.com/sample/4f0bc56a7410c540c23d023c4c87dedb2eff27cc12787ba90c9acd5171e3e86a
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.
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/3ac587a5-973b-43be-a610-fde2ec98c08c
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1630767
Signature
.NET source code contains potential unpacker
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Drops VBS files to the startup folder
Found direct / indirect Syscall (likely to bypass EDR)
Found malware configuration
Joe Sandbox ML detected suspicious sample
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
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
Sigma detected: Drops script at startup location
Sigma detected: WScript or CScript Dropper
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 sandboxes and other dynamic analysis tools (process name or module or function)
Tries to detect virtualization through RDTSC time measurements
Windows Scripting host queries suspicious COM object (likely to drop second stage)
Yara detected AntiVM3
Yara detected Costura Assembly Loader
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1630767 Sample: proformaXfaturaXXpdf.exe Startdate: 06/03/2025 Architecture: WINDOWS Score: 100 44 www.ttrading.pro 2->44 46 www.sweethome4.buzz 2->46 48 16 other IPs or domains 2->48 56 Suricata IDS alerts for network traffic 2->56 58 Found malware configuration 2->58 60 Malicious sample detected (through community Yara rule) 2->60 62 11 other signatures 2->62 11 proformaXfaturaXXpdf.exe 5 2->11         started        signatures3 process4 file5 38 C:\Users\user\AppData\Roaming\sjype.exe, PE32 11->38 dropped 40 C:\Users\user\...\sjype.exe:Zone.Identifier, ASCII 11->40 dropped 42 C:\Users\user\AppData\Roaming\...\sjype.vbs, ASCII 11->42 dropped 80 Drops VBS files to the startup folder 11->80 82 Tries to detect sandboxes and other dynamic analysis tools (process name or module or function) 11->82 84 Tries to detect virtualization through RDTSC time measurements 11->84 86 Switches to a custom stack to bypass stack traces 11->86 15 proformaXfaturaXXpdf.exe 11->15         started        signatures6 process7 signatures8 88 Modifies the context of a thread in another process (thread injection) 15->88 90 Maps a DLL or memory area into another process 15->90 92 Sample uses process hollowing technique 15->92 94 2 other signatures 15->94 18 explorer.exe 110 8 15->18 injected process9 dnsIp10 50 apihoki.live 192.185.17.102, 49783, 80 UNIFIEDLAYER-AS-1US United States 18->50 52 www.lapostehotel.one 172.67.160.167, 49980, 80 CLOUDFLARENETUS United States 18->52 54 3 other IPs or domains 18->54 64 System process connects to network (likely due to code injection or exploit) 18->64 22 wscript.exe 1 18->22         started        25 svchost.exe 18->25         started        27 sjype.exe 18->27         started        29 svchost.exe 18->29         started        signatures11 process12 signatures13 66 Windows Scripting host queries suspicious COM object (likely to drop second stage) 22->66 31 sjype.exe 2 22->31         started        68 Modifies the context of a thread in another process (thread injection) 25->68 70 Maps a DLL or memory area into another process 25->70 72 Tries to detect virtualization through RDTSC time measurements 25->72 74 Switches to a custom stack to bypass stack traces 25->74 34 cmd.exe 1 25->34         started        76 Sample uses process hollowing technique 27->76 78 Found direct / indirect Syscall (likely to bypass EDR) 27->78 process14 signatures15 96 Antivirus detection for dropped file 31->96 98 Multi AV Scanner detection for dropped file 31->98 100 Tries to detect virtualization through RDTSC time measurements 31->100 102 Switches to a custom stack to bypass stack traces 31->102 36 conhost.exe 34->36         started        process16
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/4f0bc56a7410c540c23d023c4c87dedb2eff27cc12787ba90c9acd5171e3e86a
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/4f0bc56a7410c540c23d023c4c87dedb2eff27cc12787ba90c9acd5171e3e86a/
Threat name:
Win32.Trojan.CrypterX
Create hunting rule
Status:
Malicious
First seen:
2025-03-05 09:36:30 UTC
File Type:
PE (.Net Exe)
Extracted files:
3
AV detection:
26 of 38 (68.42%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=j4f4k2tucdcubqr5ai6ezb663mxp6j6mcj4hxkimtlgvc4pd5bva._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Similar samples:
2c5e33743c225f140d1ac8ac1cddd5ad58f4e349644031f8a7954268c3aad97c
Formbook
4f0bc56a7410c540c23d023c4c87dedb2eff27cc12787ba90c9acd5171e3e86a
Formbook
60e7008e14d5a964504ea568d4626d32a20f2e68323c04b2eade9e7f1c054463
Formbook
80762425adc5f24b5c7be359dd4cb7c1c657bb21f0304dcb89eb6bd6d8d8e0da
Formbook
ca285d2b340f7cdc2b495675775d0769decadda571c3858201d9ee44298ede3e
Formbook
error
Formbook
f2042d162f33fa6527abd2dc4e593a6f89215f903b6a4afe9b57da3f6da7c6d4
Formbook
f9ee3715793db624c00bf0f71624c483729719d0dce15b4922b52f7422a420fc
Formbook
+ 2'333 additional samples on MalwareBazaar
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook campaign:kmge discovery rat spyware stealer trojan
Link:
https://tria.ge/reports/250306-j5n7cstpz4/
Behaviour
Modifies registry class
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of UnmapMainImage
Suspicious use of WriteProcessMemory
Program crash
System Location Discovery: System Language Discovery
Suspicious use of SetThreadContext
Drops startup file
Formbook payload
Formbook
Formbook family
Suspicious use of NtCreateUserProcessOtherParentProcess
Verdict:
Malicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/88a475bb-5e93-4f5b-8105-37d9b68c8beb
Unpacked files
SH256 hash:
4f0bc56a7410c540c23d023c4c87dedb2eff27cc12787ba90c9acd5171e3e86a
MD5 hash:
971051fcb62c94b5fc92d3353da71b8a
SHA1 hash:
2418f3150fa023554a3f0585b953a38106be6ebd
Link:
https://www.unpac.me/results/cc96a740-6f24-4924-b8f0-638ed4d6cb74/
SH256 hash:
4af72c151949630f79c6fd13e6b99864798ca67fb75a57b77f6f238cd5052285
MD5 hash:
995d4ef9efdcdadc5247324962a9c553
SHA1 hash:
b895c266a9986bd9ca920b7a4a6bdf5e0d37daaf
Detections:
SUSP_OBF_NET_Reactor_Indicators_Jan24
Create hunting rule
Link:
https://www.unpac.me/results/cc96a740-6f24-4924-b8f0-638ed4d6cb74/
SH256 hash:
29eb1210838b9f13a3a72500cc09792fe6dc119d59e1bb1c4075c98a8016de84
MD5 hash:
03b3fa8d1dc64d32b90305bdfaa6db7e
SHA1 hash:
21e8be3426875bfe63b3f6616402f4929c1e1530
Link:
https://www.unpac.me/results/cc96a740-6f24-4924-b8f0-638ed4d6cb74/
SH256 hash:
0f7231a35b4a1ee1374f75239b0e3d21307979d0535b652bb1deaba573876375
MD5 hash:
cf85dde721f99c5cffc0d7cfbb73e2a0
SHA1 hash:
485f6fad1f0015db97a14be0f08844569198f4a5
Link:
https://www.unpac.me/results/cc96a740-6f24-4924-b8f0-638ed4d6cb74/
SH256 hash:
19efdf03cb94895935225795f68bb9abfded1869687367013b8b4eee3cc99372
MD5 hash:
4e29f75c0c51b9dec76955f0382d9541
SHA1 hash:
4899aa8e3f57339cbaec8faab777897a76fe1c3a
Link:
https://www.unpac.me/results/cc96a740-6f24-4924-b8f0-638ed4d6cb74/
SH256 hash:
e5f86b8396486279e575c0c94bf3b86dc1e6e2baa2797ddbabebcb4bba206eb2
MD5 hash:
31e078cc207339b9e27b8aa9b2d76abe
SHA1 hash:
d1039dfae9a48d127c6f8258f24aff5bcafe2b75
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/cc96a740-6f24-4924-b8f0-638ed4d6cb74/
Parent samples :
f206c3a093c6174558ea0646b12e262d8549bee2255418d8968d3e0bb7218330
4f0bc56a7410c540c23d023c4c87dedb2eff27cc12787ba90c9acd5171e3e86a
400c68fe1ed1125e94941f896b04a4e7716cd23ce7501fb9f61dd1aa2a067d4c
f3398e6a171a2dc31c171813aba4aba9e9d81921a65151f8c16d63df8e638c88
Malware family:
FormBook
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/4f0bc56a7410/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/4f0bc56a7410c540c23d023c4c87dedb2eff27cc12787ba90c9acd5171e3e86a

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:Lumma_Stealer_Detection
Create hunting rule
Author:ashizZz
Description:Detects a specific Lumma Stealer malware sample using unique strings and behaviors
Reference:https://seanthegeek.net/posts/compromized-store-spread-lumma-stealer-using-fake-captcha/
Rule name:NET
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

Executable exe 4f0bc56a7410c540c23d023c4c87dedb2eff27cc12787ba90c9acd5171e3e86a

(this sample)

  
Delivery method
Distributed via e-mail attachment

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