MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 4f8799e5441c553ebbda342b6b06356a70dc432e5ac0434f4158146520b57ab7. 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: 13


Intelligence 13 IOCs YARA 4 File information Comments 1
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SHA256 hash: 4f8799e5441c553ebbda342b6b06356a70dc432e5ac0434f4158146520b57ab7
SHA3-384 hash: 7f9b75e1c9ca9223b78ecf52da99749505bc4f4c2aeaca1bd218759a2b645a3bf66ed53ba71e53570425b7e4ee63d7da
SHA1 hash: 9b2e8d834a7e50ec7e674433d019dbd19996036c
MD5 hash: 9284392fd96b31b3de8d8f664de3f0e4
humanhash: may-four-grey-december
File name:9284392fd96b31b3de8d8f664de3f0e4
Download: download sample
Signature FormBook
Create hunting rule
File size:446'464 bytes
First seen:2021-09-15 18:10:10 UTC
Last seen:2021-09-15 18:58:19 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'647 x AgentTesla, 19'452 x Formbook, 12'201 x SnakeKeylogger)
ssdeep 6144:qrX0zvg3rjIxvuJMQzp5dVw4JAUvxWgFdgqwixiak3IfMRfkHYgV:iEDg33IpqU4JA61dgq2G74
Threatray 8'750 similar samples on MalwareBazaar
TLSH T1E9943E2CFA056672EE8D90704D1D0AC4BFEE0B0B6E40AD9357DB15CA8F4F4E69DC5889
dhash icon d48a9a9ab2f4a1a2 (3 x a310Logger, 2 x SpyEx, 1 x FormBook)
Reporter zbetcheckin
Tags:32 exe FormBook

Intelligence

File Origin
# of uploads :
2
# of downloads :
288
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
9284392fd96b31b3de8d8f664de3f0e4
Verdict:
Malicious activity
Analysis date:
2021-09-15 18:12:03 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/e922e9d6-1715-46ae-af93-c303c095c991

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/188256/
Detection(s):
SecuriteInfo.com.Trojan005819cf1.7755.24434.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Using the Windows Management Instrumentation requests
Launching a process
Creating a file in the %temp% directory
Delayed writing of the file
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
obfuscated
Link:
https://www.filescan.io/uploads/61751cc7db358dd15ed92606/reports/ecb2b633-9ad7-4298-a977-4e6d63578fe6/overview
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/b296a855-5ce6-454a-8191-a72fc9fa76de
Result
Threat name:
FormBook
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Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/851633
Signature
Binary or sample is protected by dotNetProtector
C2 URLs / IPs found in malware configuration
Found malware configuration
Injects a PE file into a foreign processes
Machine Learning detection for dropped file
Machine Learning detection for 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)
Modifies the prolog of user mode functions (user mode inline hooks)
Multi AV Scanner detection for submitted file
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
Self deletion via cmd delete
Snort IDS alert for network traffic (e.g. based on Emerging Threat rules)
System process connects to network (likely due to code injection or exploit)
Tries to delay execution (extensive OutputDebugStringW loop)
Tries to detect virtualization through RDTSC time measurements
Uses netsh to modify the Windows network and firewall settings
Uses schtasks.exe or at.exe to add and modify task schedules
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 484063 Sample: q4tmUVp4gy Startdate: 15/09/2021 Architecture: WINDOWS Score: 100 79 Snort IDS alert for network traffic (e.g. based on Emerging Threat rules) 2->79 81 Found malware configuration 2->81 83 Malicious sample detected (through community Yara rule) 2->83 85 6 other signatures 2->85 10 q4tmUVp4gy.exe 4 2->10         started        14 browse.exe 3 2->14         started        process3 dnsIp4 61 192.168.2.1 unknown unknown 10->61 87 Tries to delay execution (extensive OutputDebugStringW loop) 10->87 89 Tries to detect virtualization through RDTSC time measurements 10->89 91 Injects a PE file into a foreign processes 10->91 16 q4tmUVp4gy.exe 10->16         started        19 cmd.exe 3 10->19         started        22 cmd.exe 1 10->22         started        93 Machine Learning detection for dropped file 14->93 24 browse.exe 14->24         started        26 cmd.exe 1 14->26         started        28 cmd.exe 1 14->28         started        signatures5 process6 file7 69 Modifies the context of a thread in another process (thread injection) 16->69 71 Maps a DLL or memory area into another process 16->71 73 Sample uses process hollowing technique 16->73 75 Queues an APC in another process (thread injection) 16->75 30 explorer.exe 16->30 injected 57 C:\Users\user\AppData\Roaming\...\browse.exe, PE32 19->57 dropped 59 C:\Users\user\...\browse.exe:Zone.Identifier, ASCII 19->59 dropped 34 conhost.exe 19->34         started        77 Uses schtasks.exe or at.exe to add and modify task schedules 22->77 36 conhost.exe 22->36         started        38 schtasks.exe 1 22->38         started        40 conhost.exe 26->40         started        42 schtasks.exe 1 26->42         started        44 conhost.exe 28->44         started        signatures8 process9 dnsIp10 63 www.fishingboatpub.com 103.72.144.19, 49777, 80 UHGL-AS-APUCloudHKHoldingsGroupLimitedHK China 30->63 65 lorrainelevis.com 192.0.78.25, 49782, 80 AUTOMATTICUS United States 30->65 67 www.lorrainelevis.com 30->67 103 System process connects to network (likely due to code injection or exploit) 30->103 105 Uses netsh to modify the Windows network and firewall settings 30->105 46 netsh.exe 30->46         started        49 cscript.exe 30->49         started        51 autofmt.exe 30->51         started        signatures11 process12 signatures13 95 Self deletion via cmd delete 46->95 97 Modifies the context of a thread in another process (thread injection) 46->97 99 Maps a DLL or memory area into another process 46->99 53 cmd.exe 1 46->53         started        101 Tries to detect virtualization through RDTSC time measurements 49->101 process14 process15 55 conhost.exe 53->55         started       
Detection:
formbook
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Link:
https://mwdb.cert.pl/sample/4f8799e5441c553ebbda342b6b06356a70dc432e5ac0434f4158146520b57ab7/
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
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Status:
Malicious
First seen:
2021-09-15 16:04:25 UTC
AV detection:
12 of 28 (42.86%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=j6dztzkedrkt5o62gqvwwbrvnjynyqzollaegt2blakgkifvpk3q._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Similar samples:
468008f5f4996c03b06d6e74a95469acee7a352f8d6bb5e718d86707da7c7c0a
FormBook
55580a7b5ec8510e0bf498f20928778b6c7b2071a31d8332f809a7a718c66b48
FormBook
818b8b831f3c774e034e2794f1eae71f62f5388355916e948b472cfdac7f5508
FormBook
984ad48db84dccbf4d978f50b0cad2c0f2eb4a256cc5f3b470facf3e411283ae
FormBook
9da4d8126ac0c4c0b68066407e24cf1a36e06f0fc22ef87b0a464f90c1374095
FormBook
9f7fd0ad05c3b8f6d3945a0753b7b20fc53528cfbf7c8b4a2ab7f49795937b44
FormBook
cb63132b863557beac43df88e49f48fad74a31758a8a95f34ea14c6e00c9b843
FormBook
e8be28fabd7cdb2d4e96137dae73bd9b227a86b654c696e9fd401cb37ec68267
FormBook
f37a8771594f5f11d6ce79551120f5d5c74ed90ae6372b98724864f07023cc34
FormBook
f5c01bcb12e33b32123e1345f1320bc5c4137cb26df006a6ec8a508fdaed4016
FormBook
+ 8'740 additional samples on MalwareBazaar
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook campaign:o4ms persistence rat spyware stealer trojan
Link:
https://tria.ge/reports/210915-wsk1dsbba4/
Behaviour
Creates scheduled task(s)
Modifies Internet Explorer settings
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Program crash
Suspicious use of SetThreadContext
Adds Run key to start application
Reads user/profile data of web browsers
Adds policy Run key to start application
Executes dropped EXE
Formbook Payload
Formbook
Malware Config
C2 Extraction:
http://www.nocodehost.com/o4ms/
Unpacked files
SH256 hash:
a799e5cbb604026846696856753a847dae483ae9d512f6c8c237967f910c5f2e
MD5 hash:
3da83dc1e5a7cecade931cfed7b221f6
SHA1 hash:
ff629cc925732876e11d490c66d9f34420fb335f
Detections:
win_formbook_g0
Create hunting rule
win_formbook_auto
Create hunting rule
Link:
https://www.unpac.me/results/07041ff6-36a0-41cf-b59e-fd6b6ad059f1/
Parent samples :
bd746ec7cac902a0b12f829efa801316f11b5ab6df024ff0f75c178134daad99
984ad48db84dccbf4d978f50b0cad2c0f2eb4a256cc5f3b470facf3e411283ae
4f8799e5441c553ebbda342b6b06356a70dc432e5ac0434f4158146520b57ab7
d9cc0ba64d20a3a60f1580c74ff1269f5b545a0abf23362cbc678b12057a6cf3
091230bdb21752192badda687f5def8c29d988ddab761901ed5c6594062c1e9d
ec427d5a521cdc4f2690ac7ffa883c982c4e3008991127998b0cfdf32f240f30
SH256 hash:
4f8799e5441c553ebbda342b6b06356a70dc432e5ac0434f4158146520b57ab7
MD5 hash:
9284392fd96b31b3de8d8f664de3f0e4
SHA1 hash:
9b2e8d834a7e50ec7e674433d019dbd19996036c
Link:
https://www.unpac.me/results/07041ff6-36a0-41cf-b59e-fd6b6ad059f1/
Malware family:
FormBook
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/4f8799e5441c/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/4f8799e5441c553ebbda342b6b06356a70dc432e5ac0434f4158146520b57ab7

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:INDICATOR_EXE_Packed_SmartAssembly
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Author:ditekSHen
Description:Detects executables packed with SmartAssembly
Rule name:pe_imphash
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Rule name:pe_imphash
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Rule name:Skystars_Malware_Imphash
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Author:Skystars LightDefender
Description:imphash

File information

The table below shows additional information about this malware sample such as delivery method and external references.

Web download

FormBook

Executable exe 4f8799e5441c553ebbda342b6b06356a70dc432e5ac0434f4158146520b57ab7

(this sample)

  
Delivery method
Distributed via web download
  
URLhaus
https://urlhaus.abuse.ch/url/1622649/
Cape
Cape
https://www.capesandbox.com/analysis/188256/

Comments


Avatar
zbet commented on 2021-09-15 18:10:11 UTC

url : hxxp://52.58.97.51/i3/U/bin-cryp.exe