MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 8d56e8c41d8094151017ec3cecc40b5aa78edb0d955d39f3c68c3d211fbcb65a. 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: 11


Intelligence 11 IOCs YARA 2 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 8d56e8c41d8094151017ec3cecc40b5aa78edb0d955d39f3c68c3d211fbcb65a
SHA3-384 hash: 8fb36fe7e9029e77caa2a9c998fbecb2f3512a3262ea9fd3ee16f2b32c527cf1fde7e606328044c02505ec722aa31484
SHA1 hash: 00b3db2230ef17b93a87cbbd432d3daaa0c02ed1
MD5 hash: ccf572ceaed6199fa88211abd5bc03b6
humanhash: venus-pennsylvania-yellow-bluebird
File name:W7f.PDF.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:1'084'416 bytes
First seen:2021-07-29 11:45:32 UTC
Last seen:2021-07-29 13:01:33 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'652 x AgentTesla, 19'463 x Formbook, 12'204 x SnakeKeylogger)
ssdeep 12288:kUumbKjZ7p5pO30/gAbCgjHXNQM2TXzAk/d4oBoRoDoyo/r7AMdTg6+cjkfe4fJA:SCG8TF/d4K64JU7NTyMCGQvWMFJR3T4
Threatray 5'985 similar samples on MalwareBazaar
TLSH T1AA359E21B6C4DA1AE11E5736CEFF50204BFCF50135B2A7646DE522FA4905F62C87C2EA
Reporter cocaman
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
2
# of downloads :
117
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
W7f.PDF.exe
Verdict:
Malicious activity
Analysis date:
2021-07-29 07:50:47 UTC
Tags:
trojan formbook stealer
Link:
https://app.any.run/tasks/7fdc86b7-e0c6-4c44-aa56-bf0641f0292a

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
Formbook
Create hunting rule
Link:
https://www.capesandbox.com/analysis/175015/
Detection(s):
SecuriteInfo.com.Trojan.Win32.Save.a.10050.749.UNOFFICIAL
Create hunting rule

Result
Verdict:
UNKNOWN
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/0a7f9055-528f-485a-943e-c497a5d8d4ed
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/823783
Signature
.NET source code contains very large strings
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Found malware configuration
Initial sample is a PE file and has a suspicious name
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)
Multi AV Scanner detection for submitted file
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
Sigma detected: Suspicious Double Extension
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 detect virtualization through RDTSC time measurements
Uses an obfuscated file name to hide its real file extension (double extension)
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 456194 Sample: W7f.PDF.exe Startdate: 29/07/2021 Architecture: WINDOWS Score: 100 35 www.seswebsite.com 2->35 37 www.selbaje.com 2->37 39 selbaje.com 2->39 55 Snort IDS alert for network traffic (e.g. based on Emerging Threat rules) 2->55 57 Found malware configuration 2->57 59 Malicious sample detected (through community Yara rule) 2->59 61 9 other signatures 2->61 10 W7f.PDF.exe 3 2->10         started        signatures3 process4 file5 33 C:\Users\user\AppData\...\W7f.PDF.exe.log, ASCII 10->33 dropped 63 Tries to detect virtualization through RDTSC time measurements 10->63 14 W7f.PDF.exe 10->14         started        signatures6 process7 signatures8 65 Modifies the context of a thread in another process (thread injection) 14->65 67 Maps a DLL or memory area into another process 14->67 69 Sample uses process hollowing technique 14->69 71 Queues an APC in another process (thread injection) 14->71 17 systray.exe 14->17         started        20 explorer.exe 14->20 injected 23 autofmt.exe 14->23         started        process9 dnsIp10 47 Modifies the context of a thread in another process (thread injection) 17->47 49 Maps a DLL or memory area into another process 17->49 51 Tries to detect virtualization through RDTSC time measurements 17->51 25 cmd.exe 1 17->25         started        41 www.spowerschool.com 72.14.178.174, 49720, 80 LINODE-APLinodeLLCUS United States 20->41 43 shops.myshopify.com 23.227.38.74, 49721, 80 CLOUDFLARENETUS Canada 20->43 45 3 other IPs or domains 20->45 53 System process connects to network (likely due to code injection or exploit) 20->53 27 autoconv.exe 20->27         started        29 autofmt.exe 20->29         started        signatures11 process12 process13 31 conhost.exe 25->31         started       
Gathering data
Threat name:
Win32.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2021-07-29 03:31:58 UTC
File Type:
PE (.Net Exe)
Extracted files:
4
AV detection:
20 of 28 (71.43%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=rvlorra5qckbkeax5q6ozrallkty5wynsvott46grq6sch54wzna._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Similar samples:
450178f7975019437a0e145934d9f99c1c4cc7be3b4ab8ab30454460447199a4
Formbook
4d8eaf37de32a6ff36c965b6e616e2085e2d1bd46e75344ca1fea59178c19f15
Formbook
5397f0168be76c7e5efee936d341eb359b9015af5e77631129dc0664105e9259
Formbook
5ae912c556f676264f800d3ab31aa932564b2dde8fae76f6dbeb8d568f92aee5
Formbook
66b02d69d4eff510190fb38504be6dcf9f94d28f14b0569c7d1cd36bfb78983d
Formbook
9445483350a3ed0479eed69073869e73b7837327bade374605b841a560a6ee70
Formbook
a4c421f35337b298e664bfd078e46efe18dcd8f5db2160196ae98221ebac2520
Formbook
aaa40ee2b509dc2b3a2f12f62d70565c85eb9aa13a7efd43bb86cfba0a3e1a88
Formbook
c494dceddfa1c8c6944a93f902c641ab5f99352ba48b81849e576f7da353314c
Formbook
+ 5'975 additional samples on MalwareBazaar
Result
Malware family:
xloader
Create hunting rule
Score:
  10/10
Tags:
family:xloader loader rat suricata
Link:
https://tria.ge/reports/210729-3wnd1x1p8e/
Behaviour
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
Suspicious use of SendNotifyMessage
Suspicious use of UnmapMainImage
Suspicious use of WriteProcessMemory
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious behavior: MapViewOfSection
Suspicious use of SetThreadContext
Deletes itself
CustAttr .NET packer
Xloader Payload
Xloader
suricata: ET MALWARE FormBook CnC Checkin (GET)
Malware Config
C2 Extraction:
http://www.ossotasarim.com/ushb/
Unpacked files
SH256 hash:
07acbfc2c0c4df4588c2f37e7d7e33b4c8e28484901d7e7c8fbbef7dd71cb0bd
MD5 hash:
c9a8323e43ec51f8319c94a628b026d3
SHA1 hash:
11154e36d757d87ff53467682a9ed0b579539165
Detections:
win_formbook_g0
Create hunting rule
win_formbook_auto
Create hunting rule
Link:
https://www.unpac.me/results/551e66fd-d1e2-43a8-a7ac-9472aedc6e3e/
Parent samples :
aaa40ee2b509dc2b3a2f12f62d70565c85eb9aa13a7efd43bb86cfba0a3e1a88
8d56e8c41d8094151017ec3cecc40b5aa78edb0d955d39f3c68c3d211fbcb65a
32bebc90eccf1fc02fa1f409233269a76243731db1192a827d31d3d1dab2f6da
d26606a4aeaa4fa8274dfc63d1262b3cedb3afbdf37e96139099632865ab8981
SH256 hash:
d2a51830601bac7f140ac3ec2dc5961a2f79e2041544f32fccd9a1611ce53c05
MD5 hash:
97fb4163ab6448059b4549cd7dc9fd87
SHA1 hash:
d74c73806ebdec4bbb612a524eb185b3cc374d53
Link:
https://www.unpac.me/results/551e66fd-d1e2-43a8-a7ac-9472aedc6e3e/
SH256 hash:
775755ce6f60430e30940a082352395e1632eef0770e153abce20714da4f16bb
MD5 hash:
efcbadc65d821729eaa811ce53a128bf
SHA1 hash:
b4b2aefdec31afe4cd1ff5534aa8ee23677b63e8
Link:
https://www.unpac.me/results/551e66fd-d1e2-43a8-a7ac-9472aedc6e3e/
SH256 hash:
97d2fa1d01b2f9a2199896e05e0cf60c14a9f41ef2d72e15fbb862b7afa08438
MD5 hash:
68463851c0e6fe7a254c99fae763d454
SHA1 hash:
4587a5371d88c296a0184fe47ee0c5245b187127
Link:
https://www.unpac.me/results/551e66fd-d1e2-43a8-a7ac-9472aedc6e3e/
SH256 hash:
8d56e8c41d8094151017ec3cecc40b5aa78edb0d955d39f3c68c3d211fbcb65a
MD5 hash:
ccf572ceaed6199fa88211abd5bc03b6
SHA1 hash:
00b3db2230ef17b93a87cbbd432d3daaa0c02ed1
Link:
https://www.unpac.me/results/551e66fd-d1e2-43a8-a7ac-9472aedc6e3e/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
0.81
Link:
https://yomi.yoroi.company/submissions/8d56e8c41d8094151017ec3cecc40b5aa78edb0d955d39f3c68c3d211fbcb65a

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:pe_imphash
Create hunting rule
Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash

File information

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

Malspam

Formbook

rar a724ba2e3550896b2cb0d9ffa8fdc600c05cfe96b54075c078c3bf31e2907fcd

Formbook

Executable exe 8d56e8c41d8094151017ec3cecc40b5aa78edb0d955d39f3c68c3d211fbcb65a

(this sample)

  
Delivery method
Other
  
Dropped by
SHA256 a724ba2e3550896b2cb0d9ffa8fdc600c05cfe96b54075c078c3bf31e2907fcd
Cape
Cape
https://www.capesandbox.com/analysis/175015/

Comments