MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b5b596f70279f40da033a19eb80841b5486fb16d9d44c2778cc158910adde7a1. 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: 18


Intelligence 18 IOCs YARA 8 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: b5b596f70279f40da033a19eb80841b5486fb16d9d44c2778cc158910adde7a1
SHA3-384 hash: e064de553515807203b5b4851f8c6776ea0517a50ae92f62a6cbda389dcb60e7bd4c78131f6d76218db9ef684261f0b4
SHA1 hash: bc70238b4b34bf1990479e4a49eceb63df7c51f5
MD5 hash: 0dfa9405d6d68db70856ad32c1d7f50d
humanhash: twenty-uranus-nebraska-beryllium
File name:rock99865.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:268'215 bytes
First seen:2023-04-13 10:51:09 UTC
Last seen:2023-04-16 15:55:13 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash 61259b55b8912888e90f516ca08dc514 (1'059 x Formbook, 741 x AgentTesla, 427 x GuLoader)
ssdeep 6144:/Ya6k90Cr93eE0s/nK2lwpdkDNZiQEoY98KRVd:/YK2CNeeK2u/SoDRVd
Threatray 2'682 similar samples on MalwareBazaar
TLSH T1F6441214BAA4C4A7D1602730ABB64D19EBF5E116789C1A4B731847883C3E3D1ED0FBA3
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 b2a89c96a2cada72 (2'283 x Formbook, 981 x Loki, 803 x AgentTesla)
Reporter lowmal3
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
3
# of downloads :
267
Origin country :
DE DE
Vendor Threat Intelligence
Malware family:
formbook
Create hunting rule
ID:
1
File name:
rock99865.exe
Verdict:
Malicious activity
Analysis date:
2023-04-13 10:53:23 UTC
Tags:
formbook xloader
Link:
https://app.any.run/tasks/1002f63a-f57d-4aa7-a8ec-925a05a92773

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/381982/
Detection(s):
SecuriteInfo.com.Variant.Fragtor.256758.10865.2935.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a file in the %temp% directory
Creating a window
Creating a process from a recently created file
Searching for synchronization primitives
Launching a process
Сreating synchronization primitives
Launching cmd.exe command interpreter
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
Result
Malware family:
n/a
Score:
  5/10
Tags:
n/a
Link:
https://dragonfly.certego.net/analysis/77712/overview
Behaviour
MalwareBazaar
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
comodo nemesis overlay packed remcos shell32.dll
Link:
https://www.filescan.io/uploads/6437ded3b4ec50bace5ff585/reports/1b5fa1c5-03bd-40ca-8b78-5bf79aa21355/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
Link:
https://www.hybrid-analysis.com/sample/b5b596f70279f40da033a19eb80841b5486fb16d9d44c2778cc158910adde7a1
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/75240a0b-9f14-4fc9-8a78-70f636c7a24a
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1213142
Signature
Antivirus detection for URL or domain
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)
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 domain / URL
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
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 dnsIp2 2 Behavior Graph ID: 846058 Sample: rock99865.exe Startdate: 13/04/2023 Architecture: WINDOWS Score: 100 34 www.corollacompany.africa 2->34 50 Snort IDS alert for network traffic 2->50 52 Multi AV Scanner detection for domain / URL 2->52 54 Found malware configuration 2->54 56 7 other signatures 2->56 12 rock99865.exe 19 2->12         started        signatures3 process4 file5 32 C:\Users\user\AppData\Local\...\jjkxpxtc.exe, PE32 12->32 dropped 15 jjkxpxtc.exe 12->15         started        process6 signatures7 66 Multi AV Scanner detection for dropped file 15->66 68 Found evasive API chain (may stop execution after reading information in the PEB, e.g. number of processors) 15->68 70 Maps a DLL or memory area into another process 15->70 72 Tries to detect virtualization through RDTSC time measurements 15->72 18 jjkxpxtc.exe 15->18         started        process8 signatures9 42 Modifies the context of a thread in another process (thread injection) 18->42 44 Maps a DLL or memory area into another process 18->44 46 Sample uses process hollowing technique 18->46 48 Queues an APC in another process (thread injection) 18->48 21 explorer.exe 3 1 18->21 injected process10 dnsIp11 36 www.eleonorasdaycare.com 52.69.215.195, 49685, 80 AMAZON-02US United States 21->36 38 www.whetegeneralprojects.africa 21->38 40 2 other IPs or domains 21->40 58 System process connects to network (likely due to code injection or exploit) 21->58 25 msdt.exe 21->25         started        signatures12 process13 signatures14 60 Modifies the context of a thread in another process (thread injection) 25->60 62 Maps a DLL or memory area into another process 25->62 64 Tries to detect virtualization through RDTSC time measurements 25->64 28 cmd.exe 1 25->28         started        process15 process16 30 conhost.exe 28->30         started       
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/b5b596f70279f40da033a19eb80841b5486fb16d9d44c2778cc158910adde7a1/
Threat name:
Win32.Trojan.FormBook
Create hunting rule
Status:
Malicious
First seen:
2023-04-13 09:41:18 UTC
File Type:
PE (Exe)
Extracted files:
3
AV detection:
14 of 35 (40.00%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=ww2zn5ycph2a3ibtugplqccbwveg7mlntvcme54myfmjccw546qq._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Similar samples:
1c629a87d868f7e9a1d1b3b121a17c18facf18fff084438f40e853bfd5cb1169
Formbook
2df9699c284bbd4241206481258a4c7e0a21eec0b4a88ab41cfd58de8d65154a
Formbook
3d269d34d687979b0d73960f880ef5eaf5cd4bf4b90129ce5d6c0c5f8ec58995
Formbook
59162d6533d5d56ceedd3f8a24e85e75cd198c72db5719188a4a582752d7fbe4
Formbook
7724828eb796d8c3310c8af73e9c19ecf37ad1af5ebc0cbd35efc5d4b36f36d2
Formbook
78fff929b8912e1b4d90a3be2e07fde0c1f08d45f3682bb009eabca909183f44
Formbook
8a5eebc7b8520bde5c361db7249fe0d5286e9074dc7e0bfc555f3f2a1166bb2a
Formbook
+ 2'672 additional samples on MalwareBazaar
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook campaign:re29 rat spyware stealer trojan
Link:
https://tria.ge/reports/230413-mydzlacc4v/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
Suspicious use of SendNotifyMessage
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Suspicious use of SetThreadContext
Executes dropped EXE
Loads dropped DLL
Formbook payload
Formbook
Unpacked files
SH256 hash:
0c65962373b6abde39add5340f4ad70514ec80c962e2bc57cb89aeafbdd8d538
MD5 hash:
be47bf0023cae99a34650594a51ba252
SHA1 hash:
ae1b60d01d5a6a835e76b6174f6eae1ca0c9b613
Detections:
FormBook
Create hunting rule
win_formbook_w0
Create hunting rule
win_formbook_auto
Create hunting rule
win_formbook_g0
Create hunting rule
Link:
https://www.unpac.me/results/8702ac1e-84ee-4ddb-b7e3-27b1e117baff/
Parent samples :
9b8da7ed293e5293ce73a4fbd1425987fa548194c416263eb46ffaec57c5f741
541e5e1932882d5833cbc39c7ab81d4faeba4a9fe4b915530be3533d0269cc99
06fbb80f37ae3534d8d87fe5444da0a09f10e45b8f2882c9e9fe89e879d380c7
b5b596f70279f40da033a19eb80841b5486fb16d9d44c2778cc158910adde7a1
33e3b47eae5dd2c0931b64dab1fa56868276ee8cadf3cda23e4310e7e640703f
SH256 hash:
d6f7e53df183873b61d33cffb82464226c46611c5877ff8e7969039b03c6aa20
MD5 hash:
6772b2c4d74f0380bbdd2addf72be709
SHA1 hash:
52a1d0ea0771bdc5c28b74b2706c14051e116252
Link:
https://www.unpac.me/results/8702ac1e-84ee-4ddb-b7e3-27b1e117baff/
SH256 hash:
b5b596f70279f40da033a19eb80841b5486fb16d9d44c2778cc158910adde7a1
MD5 hash:
0dfa9405d6d68db70856ad32c1d7f50d
SHA1 hash:
bc70238b4b34bf1990479e4a49eceb63df7c51f5
Link:
https://www.unpac.me/results/8702ac1e-84ee-4ddb-b7e3-27b1e117baff/
Malware family:
XLoader
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/b5b596f70279/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/b5b596f70279f40da033a19eb80841b5486fb16d9d44c2778cc158910adde7a1

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:azov_Dropped
Create hunting rule
Author:Potatech
Description:Azov Detection
Rule name:meth_get_eip
Create hunting rule
Author:Willi Ballenthin
Rule name:meth_stackstrings
Create hunting rule
Author:Willi Ballenthin
Rule name:shellcode
Create hunting rule
Author:nex
Description:Matched shellcode byte patterns
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.
Rule name:win_formbook_w0
Create hunting rule
Author:@malgamy12

File information

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

Malspam

Formbook

Executable exe b5b596f70279f40da033a19eb80841b5486fb16d9d44c2778cc158910adde7a1

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/381982/

Comments