MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b0b1f27468552599b6e685345007b1fdbea80c2c60a914a01a6e0abdd35fcdf5. 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 2 File information Comments
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SHA256 hash: b0b1f27468552599b6e685345007b1fdbea80c2c60a914a01a6e0abdd35fcdf5
SHA3-384 hash: b743c726c300fd39653f0c50e36e25368e90754551cc52ab2df94553a19b3a94d3a7c889e567baca38603228ca3df04f
SHA1 hash: 6a7756388406b99dc9660512f01e0bf4b5e0a36b
MD5 hash: f40257e5c24601b0660834c902ce160a
humanhash: apart-wyoming-football-lemon
File name:invoice copy.pdf.exe
Download: download sample
Signature Formbook
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File size:898'048 bytes
First seen:2022-04-14 11:10:58 UTC
Last seen:2022-04-20 10:22:13 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'653 x AgentTesla, 19'464 x Formbook, 12'205 x SnakeKeylogger)
ssdeep 24576:FFWwKkJ0DoeVEDb77JjL27Fl+LzoQ2IIv+WI7:2w74aJjLwl7Qhm+F
Threatray 14'952 similar samples on MalwareBazaar
TLSH T1AB15F140F2A86EA2D03A83F54825E50013B6BF1B697DD61D7CF6B4DF16327C26225E4B
TrID 64.2% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
11.5% (.SCR) Windows screen saver (13101/52/3)
9.2% (.EXE) Win64 Executable (generic) (10523/12/4)
5.7% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
3.9% (.EXE) Win32 Executable (generic) (4505/5/1)
File icon (PE):PE icon
dhash icon 1d19094a5b2f371e (26 x AgentTesla, 4 x NanoCore, 4 x DarkCloud)
Reporter GovCERT_CH
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
4
# of downloads :
283
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
formbook
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ID:
1
File name:
invoice copy.pdf.exe
Verdict:
Malicious activity
Analysis date:
2022-04-14 11:22:41 UTC
Tags:
formbook trojan stealer
Link:
https://app.any.run/tasks/c0b9a2a8-7b7f-4784-8ef2-45a8ab27b8e2

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/263668/
Detection(s):
SecuriteInfo.com.Variant.Strictor.265377.31623.5220.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Launching a process
Creating a process with a hidden window
Launching cmd.exe command interpreter
Unauthorized injection to a system process
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
obfuscated packed replace.exe update.exe
Link:
https://www.filescan.io/uploads/6258015bffe27d5119cd6a26/reports/365fd109-7e89-4b57-8665-0bf0ec7a3e53/overview
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.
Malware family:
Formbook
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/3e1f0614-816a-48fc-98c0-ea32807e613d
Result
Threat name:
FormBook
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Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/976767
Signature
.NET source code contains potential unpacker
Adds a directory exclusion to Windows Defender
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
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 domain / URL
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
Self deletion via cmd delete
Sigma detected: Suspicious Add Scheduled Task From User AppData Temp
Sigma detected: Suspicious Double Extension
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Tries to detect virtualization through RDTSC time measurements
Uses an obfuscated file name to hide its real file extension (double extension)
Uses netsh to modify the Windows network and firewall settings
Uses schtasks.exe or at.exe to add and modify task schedules
Yara detected AntiVM3
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 609250 Sample: invoice copy.pdf.exe Startdate: 14/04/2022 Architecture: WINDOWS Score: 100 43 Multi AV Scanner detection for domain / URL 2->43 45 Found malware configuration 2->45 47 Malicious sample detected (through community Yara rule) 2->47 49 18 other signatures 2->49 10 invoice copy.pdf.exe 7 2->10         started        process3 file4 35 C:\Users\user\AppData\...\KKgEGzaWvzdI.exe, PE32 10->35 dropped 37 C:\Users\...\KKgEGzaWvzdI.exe:Zone.Identifier, ASCII 10->37 dropped 39 C:\Users\user\AppData\Local\...\tmpFC11.tmp, XML 10->39 dropped 41 C:\Users\user\...\invoice copy.pdf.exe.log, ASCII 10->41 dropped 53 Adds a directory exclusion to Windows Defender 10->53 55 Injects a PE file into a foreign processes 10->55 14 invoice copy.pdf.exe 10->14         started        17 powershell.exe 25 10->17         started        19 schtasks.exe 1 10->19         started        signatures5 process6 signatures7 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 21 explorer.exe 14->21 injected 24 conhost.exe 17->24         started        26 conhost.exe 19->26         started        process8 signatures9 51 Uses netsh to modify the Windows network and firewall settings 21->51 28 netsh.exe 21->28         started        process10 signatures11 57 Self deletion via cmd delete 28->57 59 Modifies the context of a thread in another process (thread injection) 28->59 61 Maps a DLL or memory area into another process 28->61 63 Tries to detect virtualization through RDTSC time measurements 28->63 31 cmd.exe 1 28->31         started        process12 process13 33 conhost.exe 31->33         started       
Detection:
formbook
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Link:
https://mwdb.cert.pl/sample/b0b1f27468552599b6e685345007b1fdbea80c2c60a914a01a6e0abdd35fcdf5/
Threat name:
ByteCode-MSIL.Trojan.FormBook
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Status:
Malicious
First seen:
2022-04-14 09:02:23 UTC
File Type:
PE (.Net Exe)
Extracted files:
17
AV detection:
15 of 26 (57.69%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=wcy7e5dikusztnxgqu2fab5r7w7kqdbmmcurjia2nyfl3u27zx2q._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Similar samples:
499fb85e548a134abdf18b6a9d149b9c4f2bf9b0f534dd4c86e600180fb19bf9
Formbook
5c4b6b6b72e020bea0a32b9ca0542bd404e91eff6344648aae077ad332593744
Formbook
7bafdf9104df0d8445c2478014a23e68200d48c2c438b4ad1820f8995936d129
Formbook
af3efb1470cc4818ac5cc03b516aa833df1635a311745b78b58406b46886ad04
Formbook
b0f1a1bfefa0359f8ef181219a761192e70a2d8ec0dd07692ffe24814f50c11d
Formbook
b5cde2a22949e65c3eb965bec3fe21cc3edd2d83e5a1631bd705ab8f649daff7
Formbook
c944efe6f7ebc5786e8db1b3a3b4296daacce868fe45318adf01617050e4ea9e
Formbook
cd0c02c985600efee1edc7dcca8808cdf06f3ac1d52427d39c2931d2472caa6a
Formbook
d18ee31980399f171c8219a6d14ad83f3d61017f8d14e44c6f3f3bd067eccdf7
Formbook
+ 14'942 additional samples on MalwareBazaar
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook campaign:sf31 rat spyware stealer suricata trojan
Link:
https://tria.ge/reports/220414-m99kmsbhar/
Behaviour
Creates scheduled task(s)
Gathers network information
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
Suspicious use of SendNotifyMessage
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Suspicious use of SetThreadContext
Checks computer location settings
Deletes itself
Formbook Payload
Formbook
suricata: ET MALWARE FormBook CnC Checkin (GET)
Unpacked files
SH256 hash:
b0b1f27468552599b6e685345007b1fdbea80c2c60a914a01a6e0abdd35fcdf5
MD5 hash:
f40257e5c24601b0660834c902ce160a
SHA1 hash:
6a7756388406b99dc9660512f01e0bf4b5e0a36b
Link:
https://www.unpac.me/results/05fd685a-3565-4b34-a6e7-d97477d98085/
Malware family:
FormBook
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/b0b1f2746855/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/b0b1f27468552599b6e685345007b1fdbea80c2c60a914a01a6e0abdd35fcdf5

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
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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.

Malspam

Formbook

Executable exe b0b1f27468552599b6e685345007b1fdbea80c2c60a914a01a6e0abdd35fcdf5

(this sample)

  
Dropped by
formbook
  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/263668/

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