MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 4633bc441c059884886be83a8733f355d933b58db80f81c0a56404bceadf9667. 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: 13


Intelligence 13 IOCs YARA 3 File information Comments 1
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 4633bc441c059884886be83a8733f355d933b58db80f81c0a56404bceadf9667
SHA3-384 hash: b37aeb6f0a0a85492817e6c90369486c1622786cd10f156966a4316f362d31d67e7f3dfda313579e4b1dfe6d9d2d5c47
SHA1 hash: 594e74fe551ee2e3dcb7cef570792ee2e944b166
MD5 hash: 015d157c73a9a51f0a3745a028d3abce
humanhash: mexico-cat-ceiling-rugby
File name:015d157c73a9a51f0a3745a028d3abce
Download: download sample
Signature Formbook
Create hunting rule
File size:536'576 bytes
First seen:2021-10-03 07:54:49 UTC
Last seen:Never
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:uAUNi+hBr7IUAvHioJvR/WF9Tp9Z94W+UHuUAGr8RHj/tu:fUNi+hBr8UAvCs1WN9n4BUOU7r8
Threatray 9'831 similar samples on MalwareBazaar
TLSH T110B4AEDE1C68A3DFFB1E01F8FA79279C11AED064D8AFB1D3D606B03310669689924CD5
Reporter zbetcheckin
Tags:32 exe FormBook

Intelligence

File Origin
# of uploads :
1
# of downloads :
129
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
015d157c73a9a51f0a3745a028d3abce
Verdict:
Suspicious activity
Analysis date:
2021-10-03 07:56:00 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/f37dcbce-bfcd-4f87-84a9-f21c09758892

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/194325/
Detection(s):
SecuriteInfo.com.Trojan.PackedNET.1048-1.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Launching a process
Creating a file in the %temp% directory
Delayed writing of the file
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
keylogger obfuscated packed
Link:
https://www.filescan.io/uploads/615c2eca98a6280f39324fa3/reports/4dafa92a-5e10-44d1-96d4-4e7c854ff4a8/overview
Malware family:
Formbook
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/45802371-4268-4031-a259-d69065e491fe
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/863375
Signature
.NET source code contains potential unpacker
.NET source code contains very large strings
C2 URLs / IPs found in malware configuration
Found malware configuration
Injects a PE file into a foreign processes
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
Performs DNS queries to domains with low reputation
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
Self deletion via cmd delete
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 sandboxes and other dynamic analysis tools (process name or module or function)
Tries to detect virtualization through RDTSC time measurements
Uses netstat to query active network connections and open ports
Yara detected AntiVM3
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 495803 Sample: OApfyh3Vfm Startdate: 03/10/2021 Architecture: WINDOWS Score: 100 31 www.zoonseo.com 2->31 33 www.noordinarybusiness.com 2->33 35 3 other IPs or domains 2->35 43 Snort IDS alert for network traffic (e.g. based on Emerging Threat rules) 2->43 45 Found malware configuration 2->45 47 Malicious sample detected (through community Yara rule) 2->47 49 7 other signatures 2->49 11 OApfyh3Vfm.exe 3 2->11         started        signatures3 process4 file5 29 C:\Users\user\AppData\...\OApfyh3Vfm.exe.log, ASCII 11->29 dropped 65 Tries to detect virtualization through RDTSC time measurements 11->65 67 Injects a PE file into a foreign processes 11->67 15 OApfyh3Vfm.exe 11->15         started        signatures6 process7 signatures8 69 Modifies the context of a thread in another process (thread injection) 15->69 71 Maps a DLL or memory area into another process 15->71 73 Sample uses process hollowing technique 15->73 75 Queues an APC in another process (thread injection) 15->75 18 explorer.exe 15->18 injected process9 dnsIp10 37 sakina.digital 81.169.145.74, 49840, 80 STRATOSTRATOAGDE Germany 18->37 39 www.2ed58fwec.xyz 156.225.2.209, 49827, 80 SPEEDNETWORK-AS-APHONGKONGSPEEDNETWORKTECHNOLOGYCOL Seychelles 18->39 41 14 other IPs or domains 18->41 51 System process connects to network (likely due to code injection or exploit) 18->51 53 Performs DNS queries to domains with low reputation 18->53 55 Uses netstat to query active network connections and open ports 18->55 22 NETSTAT.EXE 18->22         started        signatures11 process12 signatures13 57 Self deletion via cmd delete 22->57 59 Modifies the context of a thread in another process (thread injection) 22->59 61 Maps a DLL or memory area into another process 22->61 63 Tries to detect virtualization through RDTSC time measurements 22->63 25 cmd.exe 1 22->25         started        process14 process15 27 conhost.exe 25->27         started       
Detection:
xloader
Create hunting rule
Link:
https://mwdb.cert.pl/sample/4633bc441c059884886be83a8733f355d933b58db80f81c0a56404bceadf9667/
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2021-10-01 04:14:15 UTC
AV detection:
28 of 45 (62.22%)
Threat level:
  5/5
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Similar samples:
1076b9efbc0e135c85f1228253f9a1d2f35f4fd49c70d290de72808f72bd56eb
Formbook
16129df384053888782272720ec796ed1e0947d6122bd32823b3ccd03e892664
Formbook
2728dc98fdebc00823b877eba49ace782c17db8a07074634aafca9dc00277776
Formbook
50c6754cbbd313acc6a250182439a1191d8f8318f0794feea75bd647b6205f7a
Formbook
87f8905d999f293634fddf1bff47a614041bdfaa2f07ef19fe70e5296a7b086e
Formbook
978a3b17f431b7ed469cd02080d82e4fb9d0b578417d061739fa790af3fb2741
Formbook
c18d5baf727358a8635a51fc7cfb4c3f4c90c78abcecf051feb4540323e98746
Formbook
c4c9d27ea805c32e7f0e66dc0d9534d8fbd87f4c1327727b2e1e9ae937f02c45
Formbook
c6ac9c7f14e2fe9196fe5fdd2a30236a157d4c04c0e5c9dc84e8592984756717
Formbook
d079479dd85fb94fe08f6cd70cfff35e39c14294174a8ed6f9b480ffc1cbc9b2
Formbook
+ 9'821 additional samples on MalwareBazaar
Result
Malware family:
xloader
Create hunting rule
Score:
  10/10
Tags:
family:xloader campaign:shjn loader rat
Link:
https://tria.ge/reports/211003-jr5besfbb7/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
Suspicious use of SetThreadContext
Xloader Payload
Xloader
Malware Config
C2 Extraction:
http://www.anamentor.com/shjn/
Unpacked files
SH256 hash:
b25dbf764b25a981f832938b6009d9a5652a61514e6781894fe2349b8057096a
MD5 hash:
8eb4e927a9446627f66a5ca01c6b7e5f
SHA1 hash:
b2296998b3d6bc3346481f808e069c37566e5a0f
Detections:
win_formbook_g0
Create hunting rule
win_formbook_auto
Create hunting rule
Link:
https://www.unpac.me/results/d30f846e-db3d-496c-bf61-b258576d69ef/
Parent samples :
4633bc441c059884886be83a8733f355d933b58db80f81c0a56404bceadf9667
591f1f8b00c0eb6b24da2646904aabaf9ee6e6dcc735cf533bb4c1ccdf9e1f60
f0537b93c3ac221e4efe9d5835845b4930529890472272b0b0f8db2bf1d4ca5b
9fd253b8d45e4204580e7277bb43bdf115b796a722ecc7afc20cad8c75dc3d60
862d9ecd31b3ad9fbdaf4f5c25e2bf5e4abbbb0a922e097a0c0dd69c8acb6ae3
SH256 hash:
de2c10bc9e95ada6fb901b6cfba7e4f95b67ba3597052546088b3a94dac571cc
MD5 hash:
cb30020c0dce059ab4edec74f6f4db7b
SHA1 hash:
c71800166f41bbcae5a525f6f81d60424e33b3bc
Link:
https://www.unpac.me/results/d30f846e-db3d-496c-bf61-b258576d69ef/
SH256 hash:
6a671abf66304301602b4afd0902840bc3915455cffc58d8916eaa693abe33ec
MD5 hash:
681eca96e4e7b513317178dc7065ef39
SHA1 hash:
24af82015bc57d125f1ccb759840118b2283d1dc
Link:
https://www.unpac.me/results/d30f846e-db3d-496c-bf61-b258576d69ef/
SH256 hash:
0f3ed36723790a88f418ccf4913493b7fbf374a96bb9b3113683b69526f782a2
MD5 hash:
fcbe71438012b7f7d9ecb3e9ac5ab5a7
SHA1 hash:
0e846262a24c902320fc5bd4b976328b5631d945
Link:
https://www.unpac.me/results/d30f846e-db3d-496c-bf61-b258576d69ef/
SH256 hash:
4633bc441c059884886be83a8733f355d933b58db80f81c0a56404bceadf9667
MD5 hash:
015d157c73a9a51f0a3745a028d3abce
SHA1 hash:
594e74fe551ee2e3dcb7cef570792ee2e944b166
Link:
https://www.unpac.me/results/d30f846e-db3d-496c-bf61-b258576d69ef/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Trojan
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/4633bc441c059884886be83a8733f355d933b58db80f81c0a56404bceadf9667

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: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.

Web download

Formbook

Executable exe 4633bc441c059884886be83a8733f355d933b58db80f81c0a56404bceadf9667

(this sample)

  
Delivery method
Distributed via web download
  
URLhaus
https://urlhaus.abuse.ch/url/1652537/
Cape
Cape
https://www.capesandbox.com/analysis/194325/

Comments


Avatar
zbet commented on 2021-10-03 07:54:51 UTC

url : hxxp://3.70.97.173/www1/det-01.exe