MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 4422661ccc0d1ca90ea0427fbe9eacc398d819ef1f557c163a686fa127444c3a. 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 5 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 4422661ccc0d1ca90ea0427fbe9eacc398d819ef1f557c163a686fa127444c3a
SHA3-384 hash: fa3ad8a7f1219e85908aaaf2d39233bcd203a48054d54af14a3316861cd759554b78ff3ec7327d3053e70edb0382f5d3
SHA1 hash: b1ddf9185a39edcf1c24df6b97a5ed89d1d2930e
MD5 hash: 528dda2fb65f094c420a81707fe5a8a9
humanhash: item-tennis-music-michigan
File name:Original Inv_pdf.gz.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:230'107 bytes
First seen:2022-11-22 08:26:45 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash 29b61e5a552b3a9bc00953de1c93be41 (174 x Formbook, 82 x AgentTesla, 81 x Loki)
ssdeep 6144:qEa0isjvuZhvGJ2qbIUn6sofacpfey4EVtm:6zDvGJ/sUGf/WBEVtm
TLSH T14924122324C1F46BD4D9B73405CFF732C6B686265A3AA3630F746E766E56683801F253
TrID 47.3% (.EXE) Win32 Executable MS Visual C++ (generic) (31206/45/13)
15.9% (.EXE) Win64 Executable (generic) (10523/12/4)
9.9% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
7.6% (.EXE) Win16 NE executable (generic) (5038/12/1)
6.8% (.EXE) Win32 Executable (generic) (4505/5/1)
File icon (PE):PE icon
dhash icon c89c98acacacbcac (31 x Loki, 23 x AgentTesla, 22 x AveMariaRAT)
Reporter cocaman
Tags:exe FormBook TNT

Intelligence

File Origin
# of uploads :
1
# of downloads :
257
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
formbook
Create hunting rule
ID:
1
File name:
Original Inv_pdf.gz.exe
Verdict:
Malicious activity
Analysis date:
2022-11-22 08:28:09 UTC
Tags:
formbook trojan stealer
Link:
https://app.any.run/tasks/cfada526-dafe-44d6-b1e9-682d9e9cf169

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/337105/
Detection(s):
Win.Dropper.Smdd-6956905-0
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a file in the %temp% directory
Creating a process from a recently created file
Launching a process
Сreating synchronization primitives
Launching cmd.exe command interpreter
Searching for synchronization primitives
Reading critical registry keys
Setting browser functions hooks
Unauthorized injection to a recently created process by context flags manipulation
Unauthorized injection to a system process
Unauthorized injection to a browser process
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
overlay packed shell32.dll
Link:
https://www.filescan.io/uploads/637c87d85f223762e6ee2b02/reports/0fd66a2a-ee9e-4987-bdc3-1315211af085/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/1df39d3d-86f7-4d79-a4ba-051e3fa4077f
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1118732
Signature
C2 URLs / IPs found in malware configuration
Found evasive API chain (may stop execution after reading information in the PEB, e.g. number of processors)
Initial sample is a PE file and has a suspicious name
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
Performs DNS queries to domains with low reputation
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 virtualization through RDTSC time measurements
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 751444 Sample: Original Inv_pdf.gz.exe Startdate: 22/11/2022 Architecture: WINDOWS Score: 100 49 Snort IDS alert for network traffic 2->49 51 Multi AV Scanner detection for domain / URL 2->51 53 Malicious sample detected (through community Yara rule) 2->53 55 5 other signatures 2->55 11 Original Inv_pdf.gz.exe 18 2->11         started        process3 file4 33 C:\Users\user\AppData\Local\Temp\welgaf.exe, PE32 11->33 dropped 14 welgaf.exe 1 11->14         started        process5 signatures6 67 Multi AV Scanner detection for dropped file 14->67 69 Machine Learning detection for dropped file 14->69 71 Found evasive API chain (may stop execution after reading information in the PEB, e.g. number of processors) 14->71 73 2 other signatures 14->73 17 welgaf.exe 14->17         started        20 conhost.exe 14->20         started        process7 signatures8 41 Modifies the context of a thread in another process (thread injection) 17->41 43 Maps a DLL or memory area into another process 17->43 45 Sample uses process hollowing technique 17->45 47 Queues an APC in another process (thread injection) 17->47 22 explorer.exe 17->22 injected process9 dnsIp10 35 www.25800.biz 103.234.73.3, 49721, 80 HIITL-AS-APHongKongFireLineNetworkLTDHK Hong Kong 22->35 37 www.yoody.xyz 3.64.163.50, 49723, 80 AMAZON-02US United States 22->37 39 www.campgreed.com 22->39 57 System process connects to network (likely due to code injection or exploit) 22->57 59 Performs DNS queries to domains with low reputation 22->59 26 raserver.exe 22->26         started        signatures11 process12 signatures13 61 Modifies the context of a thread in another process (thread injection) 26->61 63 Maps a DLL or memory area into another process 26->63 65 Tries to detect virtualization through RDTSC time measurements 26->65 29 cmd.exe 1 26->29         started        process14 process15 31 conhost.exe 29->31         started       
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/4422661ccc0d1ca90ea0427fbe9eacc398d819ef1f557c163a686fa127444c3a/
Threat name:
Win32.Trojan.FormBook
Create hunting rule
Status:
Malicious
First seen:
2022-11-22 08:21:55 UTC
File Type:
PE (Exe)
Extracted files:
4
AV detection:
25 of 26 (96.15%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=iqrgmhgmbuoksdvaij735hvmyomnqgppd5kxyfr2nbx2cj2ejq5a._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
cobaltstrike
Create hunting rule
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook campaign:sy01 rat spyware stealer trojan
Link:
https://tria.ge/reports/221122-kceynaag3w/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Program crash
Suspicious use of SetThreadContext
Loads dropped DLL
Executes dropped EXE
Formbook payload
Formbook
Unpacked files
SH256 hash:
5a6b9e753d9f7078ec399721c6aa0405159c63219b217f222f6f20d1240091e5
MD5 hash:
8c34087ed573b47ee050dd24fb30eb52
SHA1 hash:
d46acf9eed2b7c6afd87e189d33b5e05785dc199
Detections:
FormBook
Create hunting rule
win_formbook_auto
Create hunting rule
win_formbook_g0
Create hunting rule
Link:
https://www.unpac.me/results/ffc63930-a3e4-4ee9-a46f-a4b06b8c3381/
Parent samples :
260f5a6aff298b7aec332ba6500169a52412145dbe6d487f61970d34e7b69c57
2aa2b861c5fad54e2a32fa2cc376871cd2d80a1485412073f5b5f461a7723e29
1edd52620047de1ae4461b1184c25a995a8b0f924582db0ec808e0f9763b5cfc
e2f2df406e05d13e2245e2fe9da7128c257a7bb11464dce77ce386b51470abd8
b29e424c006aa87230a73e1289e52016446e85dc18dd7d60e79dbb8942ce57d4
9b4df9f66fdc83879d2ce5c5077f51e0ca02af50050fdeaccaca982bc0c59b52
071b55748a4bf8024c8db0de1a1e0201eb18bac7def0ceb902f0ff18039dfb2e
8a5eebc7b8520bde5c361db7249fe0d5286e9074dc7e0bfc555f3f2a1166bb2a
4422661ccc0d1ca90ea0427fbe9eacc398d819ef1f557c163a686fa127444c3a
SH256 hash:
3ce6cfa05e1c5e7fff0b88bf9dc268467e55132cf52d72ce3c65000190d852d5
MD5 hash:
42bf61cc5d86fa1eb5e0f68a87e20061
SHA1 hash:
23396657143c0bb29073b75776ce87fb8737070e
Link:
https://www.unpac.me/results/ffc63930-a3e4-4ee9-a46f-a4b06b8c3381/
SH256 hash:
4422661ccc0d1ca90ea0427fbe9eacc398d819ef1f557c163a686fa127444c3a
MD5 hash:
528dda2fb65f094c420a81707fe5a8a9
SHA1 hash:
b1ddf9185a39edcf1c24df6b97a5ed89d1d2930e
Link:
https://www.unpac.me/results/ffc63930-a3e4-4ee9-a46f-a4b06b8c3381/
Malware family:
FormBook
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/4422661ccc0d/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Legit
Score:
0.18
Link:
https://yomi.yoroi.company/submissions/4422661ccc0d1ca90ea0427fbe9eacc398d819ef1f557c163a686fa127444c3a

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:meth_get_eip
Create hunting rule
Author:Willi Ballenthin
Rule name:meth_stackstrings
Create hunting rule
Author:Willi Ballenthin
Rule name:Windows_Trojan_Formbook
Create hunting rule
Author:@malgamy12
Rule name:Windows_Trojan_Formbook_1112e116
Create hunting rule
Author:Elastic Security
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

gz 733c6fc39443e8ad3562738e6680876ce719471f950cac2aabdf77b7a35d6033

Formbook

Executable exe 4422661ccc0d1ca90ea0427fbe9eacc398d819ef1f557c163a686fa127444c3a

(this sample)

  
Delivery method
Other
  
Dropped by
SHA256 733c6fc39443e8ad3562738e6680876ce719471f950cac2aabdf77b7a35d6033
Cape
Cape
https://www.capesandbox.com/analysis/337105/
  
Dropped by
MD5 42c924c48f6aa6a0e6957a465ec4a45a

Comments