MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 d4771040c76dca1e55f72d53e5d4866c2b22ef12cb48d18a291bbf3cd35484bb. 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
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SHA256 hash: d4771040c76dca1e55f72d53e5d4866c2b22ef12cb48d18a291bbf3cd35484bb
SHA3-384 hash: b8196aaf541b817803eea63348742c5ad65b0a86bb498e876aa710680ac925dcf267719a79da1a04c486775039dd1101
SHA1 hash: 66f224077ffad02330809d69db6372c3975ac893
MD5 hash: 18bee3bc9ab5d434177a1ff8703b7100
humanhash: mississippi-april-connecticut-arkansas
File name:RFQ, MR# 2511004287 & 2511004288.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:1'196'544 bytes
First seen:2025-03-06 08:23:32 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'740 x AgentTesla, 19'600 x Formbook, 12'241 x SnakeKeylogger)
ssdeep 24576:AzdCpSE/4YZ0RynWzKCMy2ZM9DRgBWKQDq0JbG:Ac/PZ5nWGryUM9sfQDpbG
TLSH T1BF45D0AC7250B5DFCD57C172CAA89D70EA65387A930B820390A349EFBD0DA57DF141E2
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 10b268b296b2b2b2 (7 x Formbook, 4 x MassLogger, 4 x RemcosRAT)
Reporter threatcat_ch
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
1
# of downloads :
432
Origin country :
CH CH
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
RFQ, MR# 2511004287 & 2511004288.exe
Verdict:
No threats detected
Analysis date:
2025-03-06 08:42:55 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/f0f85663-b8eb-439d-9afe-1c0d09d120db

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
SecuriteInfo.com.BackDoor.AgentTeslaNET.29.11017.31187.UNOFFICIAL
Create hunting rule

Verdict:
Malicious
Score:
90.2%
Link:
https://cyber-fortress.com/docs/result/index.php?id=67c95d1ec8d04e92a4bf5172
Tags:
virus micro
Result
Verdict:
Malware
Maliciousness:

Behaviour
Сreating synchronization primitives
Searching for synchronization primitives
Creating a window
Unauthorized injection to a recently created process
Restart of the analyzed sample
Creating a file
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
obfuscated obfuscated obfuscated packed packed packer_detected vbnet
Link:
https://www.filescan.io/uploads/67c95bb33c5f644bd945caa4/reports/025311ac-a877-4a1d-ac4d-7618d50c9ed9/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
Link:
https://www.hybrid-analysis.com/sample/d4771040c76dca1e55f72d53e5d4866c2b22ef12cb48d18a291bbf3cd35484bb
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:
Agent Tesla
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Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/5de1cafc-0cb8-43b3-9765-9553327276d0
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1630778
Signature
.NET source code contains potential unpacker
Antivirus / Scanner detection for submitted sample
Found direct / indirect Syscall (likely to bypass EDR)
Initial sample is a PE file and has a suspicious name
Injects a PE file into a foreign processes
Joe Sandbox ML detected suspicious sample
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 submitted file
Queues an APC in another process (thread injection)
Suricata IDS alerts for network traffic
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)
Yara detected AntiVM3
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1630778 Sample: RFQ, MR# 2511004287 & 25110... Startdate: 06/03/2025 Architecture: WINDOWS Score: 100 31 www.yard.chat 2->31 33 www.fkrvhaupjtc.info 2->33 35 2 other IPs or domains 2->35 45 Suricata IDS alerts for network traffic 2->45 47 Antivirus / Scanner detection for submitted sample 2->47 49 Multi AV Scanner detection for submitted file 2->49 51 5 other signatures 2->51 10 RFQ, MR# 2511004287 & 2511004288.exe 3 2->10         started        signatures3 process4 file5 29 RFQ, MR# 2511004287 & 2511004288.exe.log, ASCII 10->29 dropped 63 Injects a PE file into a foreign processes 10->63 14 RFQ, MR# 2511004287 & 2511004288.exe 10->14         started        signatures6 process7 signatures8 65 Maps a DLL or memory area into another process 14->65 17 gfat4rKKU9G9VklIC.exe 14->17 injected process9 signatures10 43 Found direct / indirect Syscall (likely to bypass EDR) 17->43 20 wiaacmgr.exe 13 17->20         started        process11 signatures12 53 Tries to steal Mail credentials (via file / registry access) 20->53 55 Tries to harvest and steal browser information (history, passwords, etc) 20->55 57 Modifies the context of a thread in another process (thread injection) 20->57 59 3 other signatures 20->59 23 gfat4rKKU9G9VklIC.exe 20->23 injected 27 firefox.exe 20->27         started        process13 dnsIp14 37 www.fkrvhaupjtc.info 188.114.97.3, 49796, 80 CLOUDFLARENETUS European Union 23->37 39 valorpackaging.shop 3.33.130.190, 49908, 49913, 49918 AMAZONEXPANSIONGB United States 23->39 41 www.yard.chat 13.248.169.48, 49878, 49883, 49889 AMAZON-02US United States 23->41 61 Found direct / indirect Syscall (likely to bypass EDR) 23->61 signatures15
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/d4771040c76dca1e55f72d53e5d4866c2b22ef12cb48d18a291bbf3cd35484bb
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/d4771040c76dca1e55f72d53e5d4866c2b22ef12cb48d18a291bbf3cd35484bb/
Threat name:
Win32.Backdoor.FormBook
Create hunting rule
Status:
Malicious
First seen:
2025-03-05 21:06:27 UTC
File Type:
PE (.Net Exe)
Extracted files:
13
AV detection:
20 of 24 (83.33%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=2r3raqghnxfb4vpxfvj6lvegnqvsf3ysznendcrjdo7tzu2uqs5q._file
Verdict:
malicious
Label(s):
unc_loader_037
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formbook
Create hunting rule
Similar samples:
error
Formbook
Result
Malware family:
n/a
Score:
  5/10
Tags:
discovery
Link:
https://tria.ge/reports/250306-karvfatte1/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
System Location Discovery: System Language Discovery
Suspicious use of SetThreadContext
Verdict:
Malicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/98069f98-f8eb-4692-b7dd-ab70a9032d9b
Unpacked files
SH256 hash:
d4771040c76dca1e55f72d53e5d4866c2b22ef12cb48d18a291bbf3cd35484bb
MD5 hash:
18bee3bc9ab5d434177a1ff8703b7100
SHA1 hash:
66f224077ffad02330809d69db6372c3975ac893
Link:
https://www.unpac.me/results/22beb1d1-36df-4ea0-a8e2-e7987be9f202/
SH256 hash:
24765eeb3da577353f07003673f07fa2ba45e3c189519a82c4a5cbcab8eaf976
MD5 hash:
2047ca3209e0ee1f97cc74f84bc06423
SHA1 hash:
18ecf4be23ed1b564e0c33a08597eed39bf67611
Detections:
INDICATOR_EXE_Packed_SmartAssembly
Create hunting rule
Link:
https://www.unpac.me/results/22beb1d1-36df-4ea0-a8e2-e7987be9f202/
Parent samples :
ce274c08c15204a7168689d039f94e7c96a7e4a079b48cb2cbb10ec5bbf25ead
d4771040c76dca1e55f72d53e5d4866c2b22ef12cb48d18a291bbf3cd35484bb
bdc575548d1c5516325c2ff1261d8220cfdb1e612d13972e665191199cf2aa27
96d6afe5bacfca141ff4a7f9934c2de02c2e2e1681b60dd2d6549159930f0d68
SH256 hash:
0f27f173e67929fd59e8a736a941e301d77620c4db3fb6938b846d1b70f66d99
MD5 hash:
d37290c436f11496d526e3e613b60159
SHA1 hash:
338a2e58ca1c2ec19dcf24c4333e2433c7bb939d
Link:
https://www.unpac.me/results/22beb1d1-36df-4ea0-a8e2-e7987be9f202/
SH256 hash:
38002fee60c7c2961f4a2921aaf4013b80b5d0ed23103d55a21658f611c4d2db
MD5 hash:
ba14450e8920f70a2a9f07e0143884b9
SHA1 hash:
94e969a099864bed471bf15009b7e55c701e50e2
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/22beb1d1-36df-4ea0-a8e2-e7987be9f202/
SH256 hash:
edb5d97c66af6dfb0de6b67a2f6820a7912f2866475fe089baa3a79d32f522bd
MD5 hash:
2338427ca70729328f5eb1f5b9fb28f8
SHA1 hash:
9a6e4c7d6314aa8424cb9d67ddec051d7969293f
Link:
https://www.unpac.me/results/22beb1d1-36df-4ea0-a8e2-e7987be9f202/
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/d4771040c76d/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/d4771040c76dca1e55f72d53e5d4866c2b22ef12cb48d18a291bbf3cd35484bb

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

Executable exe d4771040c76dca1e55f72d53e5d4866c2b22ef12cb48d18a291bbf3cd35484bb

(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

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