MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 2b25388d41f694e67f7a237681dffe91afa258adbec617a6c203ba6fc0f6ae88. 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
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 2b25388d41f694e67f7a237681dffe91afa258adbec617a6c203ba6fc0f6ae88
SHA3-384 hash: 227f27a1b269c8cf50a2a51b066291497f57824c688a186002c45b1c4e9ee322c084b903932ce60e214e1e8570419241
SHA1 hash: 87dc431003907b574751f456952c79bd59f3706a
MD5 hash: 516f05def3b246de74d6ef1deddcefba
humanhash: low-idaho-delaware-alpha
File name:2b25388d41f694e67f7a237681dffe91afa258adbec617a6c203ba6fc0f6ae88
Download: download sample
Signature Formbook
Create hunting rule
File size:1'047'040 bytes
First seen:2023-04-04 13:27:42 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'740 x AgentTesla, 19'600 x Formbook, 12'241 x SnakeKeylogger)
ssdeep 24576:b12zVZ97uNyHFsg0Jam0yI0f56fgYI6rTJ6CqkX:bAR37uwlszJam7nUgYVHJXq
Threatray 2'630 similar samples on MalwareBazaar
TLSH T1B7259B5DE1C472FBC65793B689D0E773A22FDED1161289CDD9E82DE7B0FB608041A206
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)
Reporter adrian__luca
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
1
# of downloads :
251
Origin country :
HU HU
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
2b25388d41f694e67f7a237681dffe91afa258adbec617a6c203ba6fc0f6ae88
Verdict:
Malicious activity
Analysis date:
2023-04-04 13:27:26 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/d7bd8702-a4ce-4b8f-8f9b-304f0f5ffb16

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/380038/
Detection(s):
SecuriteInfo.com.MSIL.Kryptik.WZA.UNOFFICIAL
Create hunting rule

Sanesecurity.Malware.28872.BadIN4.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Sending a custom TCP request
Launching a process
Creating a process with a hidden window
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
packed
Link:
https://www.filescan.io/uploads/642c25e37dc0445b2388eb53/reports/ed330a20-c6e4-44f0-8c7d-1e6487252fef/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
Link:
https://www.hybrid-analysis.com/sample/2b25388d41f694e67f7a237681dffe91afa258adbec617a6c203ba6fc0f6ae88
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:
Generic Malware
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/e71d6e2a-e58d-4420-9c18-b509e2ec6d15
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1208140
Signature
.NET source code contains potential unpacker
Adds a directory exclusion to Windows Defender
Injects a PE file into a foreign processes
Machine Learning detection for dropped file
Machine Learning detection for sample
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Sigma detected: Scheduled temp file as task from temp location
Uses schtasks.exe or at.exe to add and modify task schedules
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 841057 Sample: boZB4LO43Y.exe Startdate: 04/04/2023 Architecture: WINDOWS Score: 100 41 Malicious sample detected (through community Yara rule) 2->41 43 Sigma detected: Scheduled temp file as task from temp location 2->43 45 Multi AV Scanner detection for submitted file 2->45 47 3 other signatures 2->47 7 boZB4LO43Y.exe 7 2->7         started        11 KbTwnZmBnnQg.exe 5 2->11         started        process3 file4 33 C:\Users\user\AppData\...\KbTwnZmBnnQg.exe, PE32 7->33 dropped 35 C:\Users\...\KbTwnZmBnnQg.exe:Zone.Identifier, ASCII 7->35 dropped 37 C:\Users\user\AppData\Local\...\tmpCEAE.tmp, XML 7->37 dropped 39 C:\Users\user\AppData\...\boZB4LO43Y.exe.log, ASCII 7->39 dropped 49 Uses schtasks.exe or at.exe to add and modify task schedules 7->49 51 Adds a directory exclusion to Windows Defender 7->51 53 Injects a PE file into a foreign processes 7->53 13 powershell.exe 21 7->13         started        15 schtasks.exe 1 7->15         started        17 boZB4LO43Y.exe 7->17         started        25 2 other processes 7->25 55 Multi AV Scanner detection for dropped file 11->55 57 Machine Learning detection for dropped file 11->57 19 schtasks.exe 1 11->19         started        21 KbTwnZmBnnQg.exe 11->21         started        23 KbTwnZmBnnQg.exe 11->23         started        signatures5 process6 process7 27 conhost.exe 13->27         started        29 conhost.exe 15->29         started        31 conhost.exe 19->31         started       
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/2b25388d41f694e67f7a237681dffe91afa258adbec617a6c203ba6fc0f6ae88/
Threat name:
Win32.Trojan.Leonem
Create hunting rule
Status:
Malicious
First seen:
2023-03-29 08:14:28 UTC
File Type:
PE (.Net Exe)
Extracted files:
15
AV detection:
23 of 37 (62.16%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=fmstrdkb62kom732en3idx76sgx2ewfnx3dbpjwcao5g7qhwv2ea._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Similar samples:
1d0a51787f8726c44aa40f88422d01f084c4e533c2f190f4aef1696f9fd600d9
Formbook
37af30e0d821d7a867487bcddda594c477b1bf7761f0369011eccaa450874667
Formbook
5660fce3788bebc547a3882e2b8dd0263a95b351f83f614bdb70860ba53989b8
Formbook
7ad3b811ac7212428b59433dd410b9e3413d0a5df031f7f68408dfc4aac61985
Formbook
b81f6d0c7d55bcfc2d5819f272e095eace8be77ff58c04d04ac3754052f729eb
Formbook
d343cfdbb562fad1ddb8285f9a65b91bdc15f9658e0526c886ba157b9c84549a
Formbook
e40944806883dfb2d3d00dc0b5f1285e83dd6fdd4c4023117c519c77cc1e3de4
Formbook
+ 2'620 additional samples on MalwareBazaar
Result
Malware family:
n/a
Score:
  7/10
Tags:
n/a
Link:
https://tria.ge/reports/230404-qqm43sfc26/
Behaviour
Creates scheduled task(s)
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Suspicious use of SetThreadContext
Checks computer location settings
Unpacked files
SH256 hash:
d85e729c62684bdc5f34613b012f30c0ca59f45c43531eb7a5fbc04ec68f7e93
MD5 hash:
d40976db99bc249211fd127a5844a55b
SHA1 hash:
cc36f5f5418764df2f1a28acc089d31a5e73f3dc
Detections:
win_formbook_w0
Create hunting rule
win_formbook_auto
Create hunting rule
win_formbook_g0
Create hunting rule
Link:
https://www.unpac.me/results/e15fde33-bd1f-4b73-ab5f-1510f0030037/
Parent samples :
2b25388d41f694e67f7a237681dffe91afa258adbec617a6c203ba6fc0f6ae88
c7b18628cd2f25508290da77b3ad685ecc1d0e80edc5940dd4773b8dbe037209
281905755d85f44072ff82b42789ad01d144ef1ed016cba569bcb73d3e98ee49
354c8752e895e413f243d8893cb1ba53c61d35c7e44233dfc59b85e382ec3c9b
SH256 hash:
78c2ddf3d7708086beb5ea57c40cc9f583f53bb38902a6ed8f9f57be3033700c
MD5 hash:
29338e689fca5831fb926f1361c098ed
SHA1 hash:
35dbf3f881074b6dffe491df0a77eebf0f7f3d55
Link:
https://www.unpac.me/results/e15fde33-bd1f-4b73-ab5f-1510f0030037/
SH256 hash:
4644f24b29ced6987ada1777c7ac8bd6a425ddf34f24f91aa59b365eb510904c
MD5 hash:
3b708342fad5347d500f70b6fd147c97
SHA1 hash:
def57d40eae4b371f18e124906e392a59da1bb49
Link:
https://www.unpac.me/results/e15fde33-bd1f-4b73-ab5f-1510f0030037/
SH256 hash:
b4b190818a658f0b64f5aa6d39e901e9d731bf1f58fa072b4c73120a96489bdb
MD5 hash:
3c6f8b2e78f5ebf58c4f170b30c04607
SHA1 hash:
c0ee09a1a9d1c673ad7eadabab7de44ebe0ff765
Link:
https://www.unpac.me/results/e15fde33-bd1f-4b73-ab5f-1510f0030037/
SH256 hash:
cc2f35f9a4e36607bc1ffe5bdac5bbe84ecaa6f306b4a45da2fdde3294327dd0
MD5 hash:
d99067acfe64b1f2747a309894998a84
SHA1 hash:
a9a34230da3081e04818eca87ce7eaa3a0762444
Link:
https://www.unpac.me/results/e15fde33-bd1f-4b73-ab5f-1510f0030037/
SH256 hash:
d06df7395d561e198f9b7c5481567116ff2e4c2e84437c018d2a2c8ea6c4ca37
MD5 hash:
0fb6061f7d37424fb9e6d0e76b019c19
SHA1 hash:
98a64bf7b459f032d6ec5793003bf61b5ae1dd74
Link:
https://www.unpac.me/results/e15fde33-bd1f-4b73-ab5f-1510f0030037/
Parent samples :
495607b1aef01bf7dfb64b5cb16a8fc0f161c2923627d71c69de97328f8eca3f
2434aa78b46a3afc98fa6e888c3eb56278ba52b0ff800e7e875af9c2e7f9011a
SH256 hash:
2b25388d41f694e67f7a237681dffe91afa258adbec617a6c203ba6fc0f6ae88
MD5 hash:
516f05def3b246de74d6ef1deddcefba
SHA1 hash:
87dc431003907b574751f456952c79bd59f3706a
Link:
https://www.unpac.me/results/e15fde33-bd1f-4b73-ab5f-1510f0030037/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Formbook
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/2b25388d41f694e67f7a237681dffe91afa258adbec617a6c203ba6fc0f6ae88

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
Rule name:Suspicious_Macro_Presence
Create hunting rule
Author:Mehmet Ali Kerimoglu (CYB3RMX)
Description:This rule detects common malicious/suspicious implementations.

File information

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

Cape
Cape
https://www.capesandbox.com/analysis/380038/

Comments