MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 51b75048fd9a1f0f9ad1a76c1009b3db3fd14701e7ce770370fb0f6ffaa0042f. 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
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 51b75048fd9a1f0f9ad1a76c1009b3db3fd14701e7ce770370fb0f6ffaa0042f
SHA3-384 hash: 0ee8159b7ecea67f9bd177fe9dd08a98b77627860cc17e7c2db9235520570e79f1a350e40b215d761a918844aa8f0840
SHA1 hash: a5994ec25899ff2953fdbdd4ea7d87601cbb7cbe
MD5 hash: b8578071ef790ac8a2165dfe6c69fa31
humanhash: michigan-washington-william-nevada
File name:INVOICE.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:761'344 bytes
First seen:2023-01-24 14:23:17 UTC
Last seen:2023-07-18 18:34:30 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:ReUQejkKYrubiXG+IF8zIGE8TInS396WE/6B0obD+amDpkKhPKv0j5bjxeGGGGGe:polr6Ue8PT396LgPyDmUKstb9W
TLSH T181F4E023B35C576FC66856F43032623002F1EF63A551EF44BCE1EDAE15B22AD2B612D6
TrID 71.1% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
10.2% (.EXE) Win64 Executable (generic) (10523/12/4)
6.3% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
4.3% (.EXE) Win32 Executable (generic) (4505/5/1)
2.0% (.ICL) Windows Icons Library (generic) (2059/9)
File icon (PE):PE icon
dhash icon 6ccccc9cc4dce8f4 (4 x Formbook, 3 x Smoke Loader, 3 x AsyncRAT)
Reporter cocaman
Tags:exe FormBook INVOICE

Intelligence

File Origin
# of uploads :
2
# of downloads :
211
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
formbook
Create hunting rule
ID:
1
File name:
INVOICE.exe
Verdict:
Malicious activity
Analysis date:
2023-01-24 14:24:08 UTC
Tags:
formbook xloader
Link:
https://app.any.run/tasks/32f22296-c7e8-4db4-855f-b6a177ad9285

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/356403/
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Sending a custom TCP request
Сreating synchronization primitives
Unauthorized injection to a recently created process
Creating a file
Launching a process
Launching cmd.exe command interpreter
Unauthorized injection to a system process
Verdict:
No Threat
Threat level:
  2/10
Confidence:
100%
Tags:
packed
Link:
https://www.filescan.io/uploads/63cfea051c9cbf7d62520eb0/reports/4bdd58ac-7dd4-4343-a1bc-c37930ca7aa0/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.
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/bd65922b-1e3d-4e25-af68-fe31278916b9
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1157949
Signature
Antivirus / Scanner detection for submitted sample
C2 URLs / IPs found in malware configuration
Icon mismatch, binary includes an icon from a different legit application in order to fool users
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)
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
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
Yara detected AntiVM3
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 790686 Sample: INVOICE.exe Startdate: 24/01/2023 Architecture: WINDOWS Score: 100 36 Snort IDS alert for network traffic 2->36 38 Malicious sample detected (through community Yara rule) 2->38 40 Antivirus / Scanner detection for submitted sample 2->40 42 9 other signatures 2->42 10 INVOICE.exe 3 2->10         started        process3 file4 28 C:\Users\user\AppData\...\INVOICE.exe.log, ASCII 10->28 dropped 50 Tries to detect virtualization through RDTSC time measurements 10->50 52 Injects a PE file into a foreign processes 10->52 14 INVOICE.exe 10->14         started        signatures5 process6 signatures7 54 Modifies the context of a thread in another process (thread injection) 14->54 56 Maps a DLL or memory area into another process 14->56 58 Sample uses process hollowing technique 14->58 60 Queues an APC in another process (thread injection) 14->60 17 explorer.exe 2 6 14->17 injected process8 dnsIp9 30 www.midsussexprostatecancer.uk 199.59.243.222, 49699, 80 BODIS-NJUS United States 17->30 32 www.impressionvivah.com 17->32 34 2 other IPs or domains 17->34 44 System process connects to network (likely due to code injection or exploit) 17->44 21 msiexec.exe 17->21         started        signatures10 process11 signatures12 46 Modifies the context of a thread in another process (thread injection) 21->46 48 Maps a DLL or memory area into another process 21->48 24 cmd.exe 1 21->24         started        process13 process14 26 conhost.exe 24->26         started       
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/51b75048fd9a1f0f9ad1a76c1009b3db3fd14701e7ce770370fb0f6ffaa0042f/
Threat name:
ByteCode-MSIL.Trojan.Swotter
Create hunting rule
Status:
Malicious
First seen:
2023-01-24 14:23:25 UTC
File Type:
PE (.Net Exe)
Extracted files:
21
AV detection:
22 of 25 (88.00%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=kg3vash5tipq7gwru5wbacnt3m75cryb47hhoa3q7mhw76vaaqxq._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook campaign:jn21 rat spyware stealer trojan
Link:
https://tria.ge/reports/230124-rqp44sdf6w/
Behaviour
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
Suspicious use of SetThreadContext
Deletes itself
Formbook payload
Formbook
Unpacked files
SH256 hash:
fbdaa4858947c1b200111f6e337fa95f9b021090272e05c18649480b6211c4d2
MD5 hash:
2cc8d1e7bf81e8d092807c0b217b9925
SHA1 hash:
e2593bb17056143ac685665797170f54d2491f74
Detections:
FormBook
Create hunting rule
win_formbook_w0
Create hunting rule
win_formbook_auto
Create hunting rule
win_formbook_g0
Create hunting rule
Link:
https://www.unpac.me/results/b84ba9b7-1955-4bd9-b6cd-e25cd34cdee0/
Parent samples :
51b75048fd9a1f0f9ad1a76c1009b3db3fd14701e7ce770370fb0f6ffaa0042f
e7e435eecb84da3900a62d37925ba59b537328dd1b2397d3c5c0c1b32ce1e24d
SH256 hash:
5a09608cc2adba021922badedfc1a625cd7f638c7052bc914ce87bf06a2c685b
MD5 hash:
05b0b94fbff134cac83d2c55dcbb9de2
SHA1 hash:
a1f13df7d7fce67954a0ef93dbb34db1c2e26ae9
Link:
https://www.unpac.me/results/b84ba9b7-1955-4bd9-b6cd-e25cd34cdee0/
SH256 hash:
94c2ba257a21a0eb4527346753abdedc7bb2fe3aa72d20642546994626602129
MD5 hash:
874dcc6be499121b1425bfdff1f8ad46
SHA1 hash:
66f83bedc73876b77e152c604b8214bde86d965e
Link:
https://www.unpac.me/results/b84ba9b7-1955-4bd9-b6cd-e25cd34cdee0/
SH256 hash:
51b75048fd9a1f0f9ad1a76c1009b3db3fd14701e7ce770370fb0f6ffaa0042f
MD5 hash:
b8578071ef790ac8a2165dfe6c69fa31
SHA1 hash:
a5994ec25899ff2953fdbdd4ea7d87601cbb7cbe
Link:
https://www.unpac.me/results/b84ba9b7-1955-4bd9-b6cd-e25cd34cdee0/
Malware family:
FormBook
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/51b75048fd9a/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Suspicious File
Score:
0.51
Link:
https://yomi.yoroi.company/submissions/51b75048fd9a1f0f9ad1a76c1009b3db3fd14701e7ce770370fb0f6ffaa0042f

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

zip ffce47dda6138350897df35247a9120da87af808a9d4e80390cafc2d308d4e2c

Formbook

Executable exe 51b75048fd9a1f0f9ad1a76c1009b3db3fd14701e7ce770370fb0f6ffaa0042f

(this sample)

  
Delivery method
Other
  
Dropped by
SHA256 ffce47dda6138350897df35247a9120da87af808a9d4e80390cafc2d308d4e2c
Cape
Cape
https://www.capesandbox.com/analysis/356403/
  
Dropped by
MD5 005d13bc97769969c3d87623bfd54280

Comments