MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 3c4aa39e200cb4303a3e5970bbedb5a1bb1baa656c3fc2286f82392a91e4a4ea. 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 4 File information Comments 1
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SHA256 hash: 3c4aa39e200cb4303a3e5970bbedb5a1bb1baa656c3fc2286f82392a91e4a4ea
SHA3-384 hash: e8af3d9fe8ce90caed04467de83dade8daa76a1bab0fe006d6a854060430ba8cf8791d65e9820f263b3ca8575bdd34f3
SHA1 hash: e74291e311e8466dd7222a2eb3779848385dd3fa
MD5 hash: 6923309c1cf759930f67710ac9dfd328
humanhash: twenty-kansas-summer-sierra
File name:6923309c1cf759930f67710ac9dfd328
Download: download sample
Signature Formbook
Create hunting rule
File size:523'264 bytes
First seen:2021-10-21 18:45:38 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'649 x AgentTesla, 19'461 x Formbook, 12'202 x SnakeKeylogger)
ssdeep 12288:JGk9RQVXaahBaUi2iNIYI864BI94c9Yr+tJXktSljS:JtRQMahAUi1u/864u4cWit7g
Threatray 10'735 similar samples on MalwareBazaar
TLSH T1A3B4E0463684A1EEC63AAE337C825E0C7B617CF69643D24FA583B25D097D3568E311B3
Reporter zbetcheckin
Tags:32 exe FormBook

Intelligence

File Origin
# of uploads :
1
# of downloads :
240
Origin country :
n/a
Vendor Threat Intelligence
Detection:
Formbook
Create hunting rule
Link:
https://www.capesandbox.com/analysis/199184/
Detection(s):
SecuriteInfo.com.MSIL.Kryptik.WZA.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:
obfuscated packed
Link:
https://www.filescan.io/uploads/6171b56da9d585e6d5327c43/reports/032f06cc-8ef4-43f2-8e5b-0e2c6a2e91d5/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:
Generic Malware
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Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/7d2288c8-018c-400a-86a2-a4d9482eaef9
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/874820
Signature
C2 URLs / IPs found in malware configuration
Found malware configuration
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
Self deletion via cmd delete
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
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/3c4aa39e200cb4303a3e5970bbedb5a1bb1baa656c3fc2286f82392a91e4a4ea/
Threat name:
ByteCode-MSIL.Trojan.Swotter
Create hunting rule
Status:
Malicious
First seen:
2021-10-21 18:46:06 UTC
AV detection:
15 of 27 (55.56%)
Threat level:
  5/5
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Similar samples:
0c33fe39195569a868cf9f87d3aff16e72f5a54c4e52a852b8f986d121fa47e8
Formbook
0cf11de8a0ce67a46203ae419f2aa7bb988ae3088dc4f33158dccc55b97e4a7d
Formbook
29df0bb962a305621b5f1d2a5cf0eaeae9381872e2a329230e833e6db7c999fa
Formbook
37f6df44b9dd38408fe5682c6d660eceb04a2915b3420576afce05bf3076bc01
Formbook
3cb62c9b4ec92c70df9795f481ccb5b50fd4f260441c23edcaf97c23396bf502
Formbook
9b6b00b331ea48d5477fbd0ec6e168407dcec59c758eb797c9672d2f74dba12a
Formbook
a0cea434baf3e56def0762e975e5c623c47f5ed75edbb6826ee594e260832c31
Formbook
dfe96798a6065c99050d1cb964200874b40e3916f90e3caed35df9ace3dc3198
Formbook
+ 10'725 additional samples on MalwareBazaar
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook campaign:kzk9 rat spyware stealer trojan
Link:
https://tria.ge/reports/211021-xel6zaafd3/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Suspicious use of SetThreadContext
Formbook Payload
Formbook
Malware Config
C2 Extraction:
http://www.yourmajordomo.com/kzk9/
Unpacked files
SH256 hash:
a41aa91eb1ceeeace3d3a0284fadea1769c0a30f0414398a0f5b0488bbce0a34
MD5 hash:
a56a9c13b366a7c56aed02685ea23c64
SHA1 hash:
15f83b3384f17f4dab43d868fd936f4cc516b035
Link:
https://www.unpac.me/results/805d8ef2-3296-4ff9-b31c-d25f34454438/
SH256 hash:
6fee24a1398bb022d0c5b9059b9b21e7636fc3861866a583d0e49b7d0ca56d58
MD5 hash:
36e2528c3cb3ad299ea481283687cdd6
SHA1 hash:
1981340bc7be1aa8f78f942fc6f0724838e35a87
Link:
https://www.unpac.me/results/805d8ef2-3296-4ff9-b31c-d25f34454438/
SH256 hash:
9d083e6711fa05d81808595ccb256ebec25439983acc2a4d9bf991a31767fc9e
MD5 hash:
d4aad17cf070ec0b2ebc71e1c86b5d48
SHA1 hash:
cf86991474de99b5998fd75f68b56dcb4e5879f5
Detections:
win_formbook_g0
Create hunting rule
win_formbook_auto
Create hunting rule
Link:
https://www.unpac.me/results/805d8ef2-3296-4ff9-b31c-d25f34454438/
Parent samples :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 hash:
3c4aa39e200cb4303a3e5970bbedb5a1bb1baa656c3fc2286f82392a91e4a4ea
MD5 hash:
6923309c1cf759930f67710ac9dfd328
SHA1 hash:
e74291e311e8466dd7222a2eb3779848385dd3fa
Link:
https://www.unpac.me/results/805d8ef2-3296-4ff9-b31c-d25f34454438/
Malware family:
FormBook
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/3c4aa39e200c/report/overview.html
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/3c4aa39e200cb4303a3e5970bbedb5a1bb1baa656c3fc2286f82392a91e4a4ea

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:INDICATOR_SUSPICIOUS_Stomped_PECompilation_Timestamp_InTheFuture
Create hunting rule
Author:ditekSHen
Description:Detect executables with stomped PE compilation timestamp that is greater than local current time
Rule name:pe_imphash
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Rule name:pe_imphash
Create hunting rule
Rule name:Skystars_Malware_Imphash
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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 3c4aa39e200cb4303a3e5970bbedb5a1bb1baa656c3fc2286f82392a91e4a4ea

(this sample)

  
Delivery method
Distributed via web download
  
URLhaus
https://urlhaus.abuse.ch/url/1705801/
Cape
Cape
https://www.capesandbox.com/analysis/199184/

Comments


Avatar
zbet commented on 2021-10-21 18:45:39 UTC

url : hxxp://103.125.190.6/explorer90/dllhost.exe