MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 4b040cd26bcf5a1bbedf762947faa295769ba625fdc334765e732fae81c76ad3. 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: 12


Intelligence 12 IOCs YARA 6 File information Comments
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SHA256 hash: 4b040cd26bcf5a1bbedf762947faa295769ba625fdc334765e732fae81c76ad3
SHA3-384 hash: ef5c7236d09b02fc4a43814a74de3fdf07fddae0be8b2d2fd90aa750a78272764f5637f25e0487ce4d48e21116a01381
SHA1 hash: 5ba47df1eac70ebebad22fd13524fcd6a1cce61f
MD5 hash: fec1b4d49135dea537824b8f8108e727
humanhash: lactose-purple-batman-georgia
File name:Payment_advice.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:590'848 bytes
First seen:2022-07-21 09:40:40 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'666 x AgentTesla, 19'479 x Formbook, 12'208 x SnakeKeylogger)
ssdeep 12288:ELP0ubT2iNYF/sQmGwwImcyWogXx9QOwxBTZuou5xNjx84CQo4:EbFT1As3GwwIXVlQF4ou5xNjxG
TLSH T100C4E054F6D9C13DF4FBCB7C0BE4A57466F5E6225508E87E2DA01D8E0A22FC88A52533
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)
Reporter lowmal3
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
1
# of downloads :
252
Origin country :
n/a
Vendor Threat Intelligence
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/293135/
Detection(s):
SecuriteInfo.com.MSIL.Kryptik.WZA.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Sending a custom TCP request
Unauthorized injection to a recently created process
Creating a file
Сreating synchronization primitives
Searching for synchronization primitives
Launching a process
Launching cmd.exe command interpreter
Unauthorized injection to a system process
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
packed
Link:
https://www.filescan.io/uploads/62d91f35b1b58ed7a1768b14/reports/23e4a546-ae54-4583-9e94-5b88ef057f74/overview
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/41a30c32-6731-4402-9d15-f09e1a5a0fe9
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1038483
Signature
.NET source code contains method to dynamically call methods (often used by packers)
.NET source code contains very large strings
Antivirus detection for URL or domain
C2 URLs / IPs found in 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 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 domain / URL
Multi AV Scanner detection for submitted file
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
Snort IDS alert for network traffic
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
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
Yara detected Generic Downloader
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 670977 Sample: Payment_advice.exe Startdate: 21/07/2022 Architecture: WINDOWS Score: 100 38 www.sigmundandviolet.com 2->38 40 www.qzwzsy.com 2->40 42 ext-cust.squarespace.com 2->42 46 Snort IDS alert for network traffic 2->46 48 Multi AV Scanner detection for domain / URL 2->48 50 Malicious sample detected (through community Yara rule) 2->50 52 11 other signatures 2->52 11 Payment_advice.exe 3 2->11         started        signatures3 process4 file5 36 C:\Users\user\...\Payment_advice.exe.log, ASCII 11->36 dropped 66 Tries to detect virtualization through RDTSC time measurements 11->66 68 Injects a PE file into a foreign processes 11->68 15 Payment_advice.exe 11->15         started        18 Payment_advice.exe 11->18         started        signatures6 process7 signatures8 70 Modifies the context of a thread in another process (thread injection) 15->70 72 Maps a DLL or memory area into another process 15->72 74 Sample uses process hollowing technique 15->74 76 Queues an APC in another process (thread injection) 15->76 20 explorer.exe 15->20 injected process9 dnsIp10 44 www.georgerslips.com 199.192.20.117, 49794, 80 NAMECHEAP-NETUS United States 20->44 54 System process connects to network (likely due to code injection or exploit) 20->54 24 help.exe 1 12 20->24         started        signatures11 process12 signatures13 56 Tries to steal Mail credentials (via file / registry access) 24->56 58 Tries to harvest and steal browser information (history, passwords, etc) 24->58 60 Modifies the context of a thread in another process (thread injection) 24->60 62 2 other signatures 24->62 27 cmd.exe 2 24->27         started        30 cmd.exe 1 24->30         started        process14 signatures15 64 Tries to harvest and steal browser information (history, passwords, etc) 27->64 32 conhost.exe 27->32         started        34 conhost.exe 30->34         started        process16
Detection:
formbook
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Link:
https://mwdb.cert.pl/sample/4b040cd26bcf5a1bbedf762947faa295769ba625fdc334765e732fae81c76ad3/
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2022-07-21 06:24:30 UTC
File Type:
PE (.Net Exe)
Extracted files:
10
AV detection:
27 of 40 (67.50%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=jmcazutlz5nbxpw7oyuup6vcsv3jxjrf7xbti5s6omx25aohnljq._file
Result
Malware family:
xloader
Create hunting rule
Score:
  10/10
Tags:
family:formbook family:xloader campaign:v4qp loader persistence rat spyware stealer trojan
Link:
https://tria.ge/reports/220721-lnrbhaehbn/
Behaviour
Modifies Internet Explorer settings
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
Drops file in Program Files directory
Suspicious use of SetThreadContext
Adds Run key to start application
Checks computer location settings
Deletes itself
Reads user/profile data of web browsers
Adds policy Run key to start application
Xloader payload
Formbook
Xloader
Unpacked files
SH256 hash:
6ea12b55359130c7abdf7bc1f86ec25ff311c46502331dad11bea0f262ae73db
MD5 hash:
b3511358109c094b05884fa694a48fdc
SHA1 hash:
3c7b92d4def820f949e9676ebc3df71f930905aa
Detections:
win_formbook_g0
Create hunting rule
win_formbook_auto
Create hunting rule
Link:
https://www.unpac.me/results/8fd1b760-db1e-4177-93b4-be711dcd79c6/
Parent samples :
d0c85ba5e6d88e1e0b5f068f125829b4e224b90be2488f2c21317447dc51fb9e
7ceb258885f4808b552b82920a794af157a4fb463a479468035bee2f79d82159
b64048775efce2b4acc5e62c5871538b46928fa3a38bd7f253c750f309373af6
4b040cd26bcf5a1bbedf762947faa295769ba625fdc334765e732fae81c76ad3
3e066842df7778508238b2459cb55c96aceb7b92fce4bca51459393693a95dee
65cd6a8ac30be5ff3bc96e9a496840df43415bcdc0d5ebff61defe52aed835f1
SH256 hash:
5e97ccd8dafcb36b3cb772f6a2fd425abcf221ab9ea1930e8c2618c95332f2c6
MD5 hash:
01800f6b045def8d90c649842f56d752
SHA1 hash:
f8434a4636d0772d01aac44bb3f9753a41f01d34
Link:
https://www.unpac.me/results/8fd1b760-db1e-4177-93b4-be711dcd79c6/
SH256 hash:
9eedba7e7e841494ea5f4d41c458ed37897b7bd49e61a5490694ad663155963d
MD5 hash:
a31194c7a4ff8f7cae21686ed687cb2f
SHA1 hash:
1b74a067393fbe1f95ecfc27fa552528de7ad76e
Link:
https://www.unpac.me/results/8fd1b760-db1e-4177-93b4-be711dcd79c6/
SH256 hash:
4b040cd26bcf5a1bbedf762947faa295769ba625fdc334765e732fae81c76ad3
MD5 hash:
fec1b4d49135dea537824b8f8108e727
SHA1 hash:
5ba47df1eac70ebebad22fd13524fcd6a1cce61f
Link:
https://www.unpac.me/results/8fd1b760-db1e-4177-93b4-be711dcd79c6/
Malware family:
XLoader
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/4b040cd26bcf/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
0.71
Link:
https://yomi.yoroi.company/submissions/4b040cd26bcf5a1bbedf762947faa295769ba625fdc334765e732fae81c76ad3

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:malware_Formbook_strings
Create hunting rule
Author:JPCERT/CC Incident Response Group
Description:detect Formbook in memory
Reference:internal research
Rule name:meth_get_eip
Create hunting rule
Author:Willi Ballenthin
Rule name:meth_stackstrings
Create hunting rule
Author:Willi Ballenthin
Rule name:pe_imphash
Create hunting rule
Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash
Rule name:win_formbook_auto
Create hunting rule
Author:Felix Bilstein - yara-signator at cocacoding dot com
Description:Detects win.formbook.

File information

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

Malspam

Formbook

Executable exe 4b040cd26bcf5a1bbedf762947faa295769ba625fdc334765e732fae81c76ad3

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/293135/

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