MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 a83b3d1a4e0efa64419083e646d8cfe80942ed0804e3576c98956e7a2260848d. 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: 14


Intelligence 14 IOCs YARA 1 File information Comments 1
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: a83b3d1a4e0efa64419083e646d8cfe80942ed0804e3576c98956e7a2260848d
SHA3-384 hash: 2569ddc7cfc2b75c0607775874285bfbf579665c684a9849ced614f33718c2336a2e5d7f2c21c954d125fa959805a3e2
SHA1 hash: 72f95712aad8d71b37ce4406d5cab1431226718b
MD5 hash: a1ef3aeba94469b98befd1a6ba1a8b47
humanhash: jig-august-king-gee
File name:a1ef3aeba94469b98befd1a6ba1a8b47
Download: download sample
Signature Formbook
Create hunting rule
File size:562'176 bytes
First seen:2023-04-26 13:06:59 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
ssdeep 12288:rOCbx/uQ/eP4zSGoh0vEQHqRLlJAFJBm0C:rOs8Q/m4zShh0vPILPAJ40C
Threatray 1'350 similar samples on MalwareBazaar
TLSH T124C4CF1837F49498F3F3DA706DB59429BB3A7E9E2D35D2AC0944420C1D317A4A852FBB
TrID 44.4% (.EXE) Win64 Executable (generic) (10523/12/4)
21.3% (.EXE) Win16 NE executable (generic) (5038/12/1)
8.7% (.ICL) Windows Icons Library (generic) (2059/9)
8.5% (.EXE) OS/2 Executable (generic) (2029/13)
8.4% (.EXE) Generic Win/DOS Executable (2002/3)
Reporter zbetcheckin
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
1
# of downloads :
291
Origin country :
FR FR
Vendor Threat Intelligence
Malware family:
formbook
Create hunting rule
ID:
1
File name:
OFERTA_64726424782424.xls
Verdict:
Malicious activity
Analysis date:
2023-04-26 08:24:45 UTC
Tags:
opendir exploit cve-2017-11882 loader formbook trojan stealer
Link:
https://app.any.run/tasks/d6d376fe-8004-4338-8a15-02c3b3b49428

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/385061/
Detection(s):
SecuriteInfo.com.Variant.Ser.Tedy.4449.2044.13340.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Launching a process
Creating a file
Сreating synchronization primitives
Sending a custom TCP request
Unauthorized injection to a system process
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
anti-vm packed
Link:
https://www.filescan.io/uploads/644921f8f61aa38da9fbf9ba/reports/00f56944-5ee2-4433-a41c-bd39840d1f5b/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_90%
Link:
https://www.hybrid-analysis.com/sample/a83b3d1a4e0efa64419083e646d8cfe80942ed0804e3576c98956e7a2260848d
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/bc4428b4-f228-4f5e-a87f-fde62f4973e8
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1221527
Signature
.NET source code contains potential unpacker
.NET source code contains very large array initializations
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
Multi AV Scanner detection for submitted file
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Writes to foreign memory regions
Yara detected AntiVM3
Yara detected FormBook
Yara detected UAC Bypass using CMSTP
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 854476 Sample: 3YmFlfuN4q.exe Startdate: 26/04/2023 Architecture: WINDOWS Score: 100 21 Malicious sample detected (through community Yara rule) 2->21 23 Multi AV Scanner detection for submitted file 2->23 25 Yara detected FormBook 2->25 27 6 other signatures 2->27 6 3YmFlfuN4q.exe 3 2->6         started        process3 file4 19 C:\Users\user\AppData\...\3YmFlfuN4q.exe.log, CSV 6->19 dropped 29 Writes to foreign memory regions 6->29 31 Injects a PE file into a foreign processes 6->31 10 AddInProcess32.exe 6->10         started        13 ServiceModelReg.exe 6->13         started        15 aspnet_compiler.exe 6->15         started        17 aspnet_state.exe 6->17         started        signatures5 process6 signatures7 33 Maps a DLL or memory area into another process 10->33
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/a83b3d1a4e0efa64419083e646d8cfe80942ed0804e3576c98956e7a2260848d/
Threat name:
ByteCode-MSIL.Trojan.FormBook
Create hunting rule
Status:
Malicious
First seen:
2023-04-26 09:08:30 UTC
File Type:
PE+ (.Net Exe)
Extracted files:
1
AV detection:
17 of 22 (77.27%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=va5t2gsob35giqmqqptenwgp5aeuf3iiatrvo3eysvxhuitaqsgq._file
Verdict:
malicious
Similar samples:
2267fac6e4bcace94d9ed232cc4ba7e128424e80c5730ea38f23610c11bdc168
Formbook
28ff484ca36b3a1f5d7f59a25e947e9a6b12ca34214f9bcfca01cee5745e6b6a
Formbook
49525525300554e0603a1ee766a78813c54ed100ca3292cf781d0223511beaef
Formbook
6159a8ba420cbed9d0ca9abb371cd8b1e600c0e2fd7763f32cec6917605d51d9
Formbook
b4deb473da425d45200dfa7d62eb24fa218d21969cd2483ffbedd04f61e374e9
Formbook
d26b936b2d61001819fc4e99a224224d35edd9fd716bfe7bc5dbd431f584150e
Formbook
daf7f2c5a8bd9f58da492ae3596ac4a15fe9138c5faa3673fa1be55f8d4157cb
Formbook
e5b432be651f1c2e2d10923fa2e07f21d3ccbb98a1238d04a8b8a6f801b19fae
Formbook
fb8fdb08cf7984a3bac0cc7daeea3790a92306467543cf556945fc479a165dd8
Formbook
+ 1'340 additional samples on MalwareBazaar
Result
Malware family:
n/a
Score:
  5/10
Tags:
n/a
Link:
https://tria.ge/reports/230426-qcmw6ahe27/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Suspicious use of SetThreadContext
Unpacked files
SH256 hash:
a83b3d1a4e0efa64419083e646d8cfe80942ed0804e3576c98956e7a2260848d
MD5 hash:
a1ef3aeba94469b98befd1a6ba1a8b47
SHA1 hash:
72f95712aad8d71b37ce4406d5cab1431226718b
Link:
https://www.unpac.me/results/eef404d2-59bc-45f9-8486-5e4155ea024e/
Malware family:
XLoader
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/a83b3d1a4e0e/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/a83b3d1a4e0efa64419083e646d8cfe80942ed0804e3576c98956e7a2260848d

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:pdb_YARAify
Create hunting rule
Author:@wowabiy314
Description:PDB

File information

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

Web download

Formbook

Executable exe a83b3d1a4e0efa64419083e646d8cfe80942ed0804e3576c98956e7a2260848d

(this sample)

  
Delivery method
Distributed via web download
Cape
Cape
https://www.capesandbox.com/analysis/385061/
  
URLhaus
https://urlhaus.abuse.ch/url/2618807/

Comments


Avatar
zbet commented on 2023-04-26 13:07:06 UTC

url : hxxp://103.133.106.39/22621H2/vbc.exe