MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 4fa40e3581a918c9056869d70903c1cece412ef17ad7dc2e26526f3963bfe015. 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: 17


Intelligence 17 IOCs YARA 6 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 4fa40e3581a918c9056869d70903c1cece412ef17ad7dc2e26526f3963bfe015
SHA3-384 hash: 758c88f905971cd82ea272df99b59c1489c1163da6d5c863a0bef95d00de8d00b6f7cba6586d70456ddfdf4eada76eaa
SHA1 hash: 616f9832443df6922b4dea91f5e062b16d8e4cb5
MD5 hash: 9296bbe4730f54cf8a93c3e3c2cd9f8c
humanhash: cold-summer-avocado-asparagus
File name:Поръчка за покупка през ноември pdf.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:559'104 bytes
First seen:2023-11-22 21:29:12 UTC
Last seen:2023-11-22 23:28:35 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'741 x AgentTesla, 19'606 x Formbook, 12'242 x SnakeKeylogger)
ssdeep 12288:b8osMC5THIVWFqNPdEJ23eXVGE5Od5q/lph8tvN6SMcH:YzMC5TSC8Pdu23eXQQoo97EHMc
Threatray 1'324 similar samples on MalwareBazaar
TLSH T14BC4125529AD3BE6EB7F5BF21469141417FA930E7871FA4E2E8059ED14F0B000B22FA7
TrID 63.0% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
11.2% (.SCR) Windows screen saver (13097/50/3)
9.0% (.EXE) Win64 Executable (generic) (10523/12/4)
5.6% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
3.8% (.EXE) Win32 Executable (generic) (4505/5/1)
Reporter Anonymous
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
2
# of downloads :
342
Origin country :
CH CH
Vendor Threat Intelligence
Malware family:
formbook
Create hunting rule
ID:
1
File name:
Поръчка за покупка през ноември pdf.exe
Verdict:
Malicious activity
Analysis date:
2023-11-22 21:30:54 UTC
Tags:
formbook xloader
Link:
https://app.any.run/tasks/b892d725-63aa-48cd-a426-2c67859a3240

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
SecuriteInfo.com.Trojan.Inject4.59820.3625.23367.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Creating a window
Sending a custom TCP request
Creating a file in the %AppData% directory
Enabling the 'hidden' option for recently created files
Adding an access-denied ACE
Сreating synchronization primitives
Creating a process with a hidden window
Creating a file in the %temp% directory
Launching a process
Creating a file
Launching cmd.exe command interpreter
Adding an exclusion to Microsoft Defender
Enabling autorun by creating a file
Unauthorized injection to a system process
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
Link:
https://www.hybrid-analysis.com/sample/4fa40e3581a918c9056869d70903c1cece412ef17ad7dc2e26526f3963bfe015
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/7fafd805-7953-4847-8ade-bb74f70f3345
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1346617
Signature
.NET source code contains potential unpacker
.NET source code contains very large array initializations
Adds a directory exclusion to Windows Defender
Allocates memory in foreign processes
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 dropped file
Multi AV Scanner detection for submitted file
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
Sigma detected: Scheduled temp file as task from temp location
Snort IDS alert for network traffic
System process connects to network (likely due to code injection or exploit)
Tries to detect virtualization through RDTSC time measurements
Uses schtasks.exe or at.exe to add and modify task schedules
Writes to foreign memory regions
Yara detected AntiVM3
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1346617 Sample: 0438_pdf.exe Startdate: 22/11/2023 Architecture: WINDOWS Score: 100 53 www.y0rvragmr5.com 2->53 55 www.trsmine.com 2->55 57 12 other IPs or domains 2->57 73 Snort IDS alert for network traffic 2->73 75 Found malware configuration 2->75 77 Malicious sample detected (through community Yara rule) 2->77 79 11 other signatures 2->79 11 0438_pdf.exe 7 2->11         started        15 lRQULahIguvfxc.exe 5 2->15         started        signatures3 process4 file5 49 C:\Users\user\AppData\...\lRQULahIguvfxc.exe, PE32 11->49 dropped 51 C:\Users\user\AppData\Local\...\tmp4818.tmp, XML 11->51 dropped 87 Uses schtasks.exe or at.exe to add and modify task schedules 11->87 89 Writes to foreign memory regions 11->89 91 Allocates memory in foreign processes 11->91 93 Adds a directory exclusion to Windows Defender 11->93 17 RegSvcs.exe 11->17         started        20 powershell.exe 23 11->20         started        22 schtasks.exe 1 11->22         started        95 Multi AV Scanner detection for dropped file 15->95 97 Machine Learning detection for dropped file 15->97 99 Injects a PE file into a foreign processes 15->99 24 RegSvcs.exe 15->24         started        26 schtasks.exe 1 15->26         started        28 RegSvcs.exe 15->28         started        signatures6 process7 signatures8 65 Modifies the context of a thread in another process (thread injection) 17->65 67 Maps a DLL or memory area into another process 17->67 69 Sample uses process hollowing technique 17->69 71 2 other signatures 17->71 30 explorer.exe 6 1 17->30 injected 34 conhost.exe 20->34         started        36 conhost.exe 22->36         started        38 conhost.exe 26->38         started        process9 dnsIp10 59 trsmine.com 208.109.57.58, 49745, 80 SUCURI-SECUS United States 30->59 61 railway-tandoori.com 162.159.135.89, 49744, 80 CLOUDFLARENETUS United States 30->61 63 3 other IPs or domains 30->63 101 System process connects to network (likely due to code injection or exploit) 30->101 40 raserver.exe 30->40         started        43 msiexec.exe 30->43         started        signatures11 process12 signatures13 81 Modifies the context of a thread in another process (thread injection) 40->81 83 Maps a DLL or memory area into another process 40->83 85 Tries to detect virtualization through RDTSC time measurements 40->85 45 cmd.exe 40->45         started        process14 process15 47 conhost.exe 45->47         started       
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/4fa40e3581a918c9056869d70903c1cece412ef17ad7dc2e26526f3963bfe015
Detection:
formbook
Create hunting rule
Link:
https://mwdb.cert.pl/sample/4fa40e3581a918c9056869d70903c1cece412ef17ad7dc2e26526f3963bfe015/
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2023-11-22 07:00:24 UTC
File Type:
PE (.Net Exe)
Extracted files:
13
AV detection:
18 of 23 (78.26%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=j6sa4nmbvemmsblinhlqsa6bz3heclxrpll5ylrgkjxtsy574akq._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Similar samples:
08bd19ee270606f776e998984c478e35eb93b7a8eade7c4d945d2869ece51ed9
Formbook
5e4b300ac46a2d4719d60e261c479afc3ed6f4027afcb5f620a7bdf33d876336
Formbook
b53da778b0496c07c9ce9532c3a127f8e9cf08fc5d4b7d81a5bff05823deb28d
Formbook
fa86b4d3e3e4217d2c502925eb6c41fb7a9bf0a17a976fc6a11a849d5861c8d0
Formbook
+ 1'314 additional samples on MalwareBazaar
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook campaign:ey16 rat spyware stealer trojan
Link:
https://tria.ge/reports/231122-1cfsyseg33/
Behaviour
Creates scheduled task(s)
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of UnmapMainImage
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Suspicious use of SetThreadContext
Checks computer location settings
Formbook payload
Formbook
Unpacked files
SH256 hash:
5be1f28d9498131099c4989b821b1a289e9ee6475472309482db944fc99e2fab
MD5 hash:
c1d50dfc28e785fef6639c4619cea4af
SHA1 hash:
39ef93d0350a6edd0bbbeabf0ff361fbd913f8fe
Detections:
FormBook
Create hunting rule
win_formbook_w0
Create hunting rule
win_formbook_auto
Create hunting rule
win_formbook_g0
Create hunting rule
Formbook
Create hunting rule
Link:
https://www.unpac.me/results/1d85be00-5c11-42ae-9788-61f109a56f4f/
Parent samples :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 hash:
327c72bd7743cafdec57f56ae8bad2616b2d736096d1633b50c9d417f173ab65
MD5 hash:
c5122cb68edac6cabb384962f0033a6e
SHA1 hash:
fe9a62f82349380407f2a325c791dee5dce6bf70
Link:
https://www.unpac.me/results/1d85be00-5c11-42ae-9788-61f109a56f4f/
SH256 hash:
3fc435481d7ef0079bdad4dd86185e61a5092a5df4a3e17a75266cf283effaa1
MD5 hash:
ead80ad88662af6f37f0c49fe6e3fb44
SHA1 hash:
dbeb4019c7337347d1c6d0913c9249021cafd849
Link:
https://www.unpac.me/results/1d85be00-5c11-42ae-9788-61f109a56f4f/
SH256 hash:
18248f007e0342921d14b044001395c8447b73534cfee7a4c89a90e681b51a6b
MD5 hash:
adad3a3e7925f43b9f797f289d25f890
SHA1 hash:
4e7d436dc161026da67ef02b78acf02d7d9b38dc
Link:
https://www.unpac.me/results/1d85be00-5c11-42ae-9788-61f109a56f4f/
SH256 hash:
4fa40e3581a918c9056869d70903c1cece412ef17ad7dc2e26526f3963bfe015
MD5 hash:
9296bbe4730f54cf8a93c3e3c2cd9f8c
SHA1 hash:
616f9832443df6922b4dea91f5e062b16d8e4cb5
Link:
https://www.unpac.me/results/1d85be00-5c11-42ae-9788-61f109a56f4f/
Malware family:
FormBook
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/4fa40e3581a9/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/4fa40e3581a918c9056869d70903c1cece412ef17ad7dc2e26526f3963bfe015

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:AgentTesla_DIFF_Common_Strings_01
Create hunting rule
Author:schmidtsz
Description:Identify partial Agent Tesla strings
Rule name:BitcoinAddress
Create hunting rule
Author:Didier Stevens (@DidierStevens)
Description:Contains a valid Bitcoin address
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

File information

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

Malspam

Formbook

Executable exe 4fa40e3581a918c9056869d70903c1cece412ef17ad7dc2e26526f3963bfe015

(this sample)

  
Delivery method
Distributed via e-mail attachment

Comments