MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 3f97bf9bdfc07c39df433605eda1cfdc6617e4142e8a49f182f547fa25243c62. 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 7 File information Comments
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SHA256 hash: 3f97bf9bdfc07c39df433605eda1cfdc6617e4142e8a49f182f547fa25243c62
SHA3-384 hash: ecec714b2a3fbaf3483abf899ac03b74de5c196356bdf13a695e0e376aa7076c13f98f5c564b7223908ca73f15277d29
SHA1 hash: 9e691a93f17e8b4a0a871892889663a3c2c32572
MD5 hash: 6e242c54644dc4865f452c83922063f1
humanhash: summer-virginia-nitrogen-muppet
File name:PO-07-2022-00062.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:123'904 bytes
First seen:2022-07-23 06:57:07 UTC
Last seen:2022-07-25 06:53:33 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'662 x AgentTesla, 19'474 x Formbook, 12'208 x SnakeKeylogger)
ssdeep 3072:izDd7hY7SrOAOkGt6+duWA/t/SHUebbxCbGgKk12qk/Wn/87gUHCzQgtn9MXCk94:whGt+S
TLSH T1E5C321827145DCDAD45328F258AED57060B47ECF8165CA0D3B83BF2A94E734234A7B9E
TrID 72.5% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
10.4% (.EXE) Win64 Executable (generic) (10523/12/4)
6.5% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
4.4% (.EXE) Win32 Executable (generic) (4505/5/1)
2.0% (.EXE) OS/2 Executable (generic) (2029/13)
File icon (PE):PE icon
dhash icon f29296968e9e9ea6 (60 x AgentTesla, 37 x RedLineStealer, 35 x Formbook)
Reporter GovCERT_CH
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
3
# of downloads :
341
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
formbook
Create hunting rule
ID:
1
File name:
https://bazaar.abuse.ch/download/3f97bf9bdfc07c39df433605eda1cfdc6617e4142e8a49f182f547fa25243c62/
Verdict:
Malicious activity
Analysis date:
2022-07-23 07:21:08 UTC
Tags:
formbook trojan stealer
Link:
https://app.any.run/tasks/4ff906bb-1541-44ca-9416-95be85e609a7

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/293607/
Detection(s):
SecuriteInfo.com.Trojan.Mardom.MN.9.12168.17657.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Сreating synchronization primitives
DNS request
Sending an HTTP GET request
Launching a process
Creating a process with a hidden window
Sending a custom TCP request
Creating a file in the %AppData% subdirectories
Creating a file
Launching cmd.exe command interpreter
Enabling autorun by creating a file
Unauthorized injection to a system process
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
formbook
Link:
https://www.filescan.io/uploads/62db9c840e298a94f3f1e1a2/reports/afc34bd4-0ca4-4644-9d0f-3728c9361291/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.
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/0a2b8074-d3e6-41c5-9991-58e5d2140246
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1039646
Signature
.NET source code contains potential unpacker
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Creates an undocumented autostart registry key
Drops executable to a common third party application directory
Encrypted powershell cmdline option found
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 dropped file
Multi AV Scanner detection for submitted file
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
Tries to detect virtualization through RDTSC time measurements
Uses netsh to modify the Windows network and firewall settings
Yara detected FormBook
Yara detected Generic Downloader
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 672140 Sample: PO-07-2022-00062.exe Startdate: 23/07/2022 Architecture: WINDOWS Score: 100 44 Malicious sample detected (through community Yara rule) 2->44 46 Antivirus detection for URL or domain 2->46 48 Multi AV Scanner detection for dropped file 2->48 50 8 other signatures 2->50 10 PO-07-2022-00062.exe 15 7 2->10         started        process3 dnsIp4 42 mnsemesta1.com 162.241.123.17, 49719, 80 UNIFIEDLAYER-AS-1US United States 10->42 36 C:\Users\user\AppData\Roaming\...\Adobe.exe, PE32 10->36 dropped 38 C:\Users\user\...\Adobe.exe:Zone.Identifier, ASCII 10->38 dropped 40 C:\Users\user\...\PO-07-2022-00062.exe.log, ASCII 10->40 dropped 54 Creates an undocumented autostart registry key 10->54 56 Encrypted powershell cmdline option found 10->56 58 Drops executable to a common third party application directory 10->58 15 MSBuild.exe 10->15         started        18 MSBuild.exe 10->18         started        20 powershell.exe 18 10->20         started        22 2 other processes 10->22 file5 signatures6 process7 signatures8 66 Modifies the context of a thread in another process (thread injection) 15->66 68 Maps a DLL or memory area into another process 15->68 70 Sample uses process hollowing technique 15->70 72 Queues an APC in another process (thread injection) 15->72 24 explorer.exe 15->24 injected 74 Tries to detect virtualization through RDTSC time measurements 18->74 27 conhost.exe 20->27         started        process9 signatures10 52 Uses netsh to modify the Windows network and firewall settings 24->52 29 netsh.exe 24->29         started        process11 signatures12 60 Modifies the context of a thread in another process (thread injection) 29->60 62 Maps a DLL or memory area into another process 29->62 64 Tries to detect virtualization through RDTSC time measurements 29->64 32 cmd.exe 1 29->32         started        process13 process14 34 conhost.exe 32->34         started       
Detection:
formbook
Create hunting rule
Link:
https://mwdb.cert.pl/sample/3f97bf9bdfc07c39df433605eda1cfdc6617e4142e8a49f182f547fa25243c62/
Threat name:
ByteCode-MSIL.Trojan.Mardom
Create hunting rule
Status:
Malicious
First seen:
2022-07-23 03:45:38 UTC
File Type:
PE (.Net Exe)
Extracted files:
13
AV detection:
22 of 40 (55.00%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=h6l37g67yb6dtx2dgyc63iop3rtbpzauf2fet4mc6vd7ujjehrra._file
Verdict:
malicious
Label(s):
formbook
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Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook campaign:fs44 rat spyware stealer suricata trojan
Link:
https://tria.ge/reports/220723-hrg1fscgb7/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Suspicious use of SetThreadContext
Checks computer location settings
Formbook payload
Formbook
suricata: ET MALWARE FormBook CnC Checkin (GET)
Unpacked files
SH256 hash:
3f97bf9bdfc07c39df433605eda1cfdc6617e4142e8a49f182f547fa25243c62
MD5 hash:
6e242c54644dc4865f452c83922063f1
SHA1 hash:
9e691a93f17e8b4a0a871892889663a3c2c32572
Link:
https://www.unpac.me/results/f52306bd-afbf-4f18-86b7-ffbf923bccd2/
Malware family:
FormBook
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/3f97bf9bdfc0/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Suspicious File
Score:
0.38
Link:
https://yomi.yoroi.company/submissions/3f97bf9bdfc07c39df433605eda1cfdc6617e4142e8a49f182f547fa25243c62

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:cobalt_strike_tmp01925d3f
Create hunting rule
Author:The DFIR Report
Description:files - file ~tmp01925d3f.exe
Reference:https://thedfirreport.com
Rule name:malware_Formbook_strings
Create hunting rule
Author:JPCERT/CC Incident Response Group
Description:detect Formbook in memory
Reference:internal research
Rule name:meth_get_eip
Create hunting rule
Author:Willi Ballenthin
Rule name:meth_stackstrings
Create hunting rule
Author:Willi Ballenthin
Rule name:pe_imphash
Create hunting rule
Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash
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

zip 772c92cb2ef2e880b4c55e4a953b9792223125792be9981ee69b8bfafe0e2867

Formbook

Executable exe 3f97bf9bdfc07c39df433605eda1cfdc6617e4142e8a49f182f547fa25243c62

(this sample)

  
Dropped by
formbook
  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/293607/
  
Dropped by
SHA256 772c92cb2ef2e880b4c55e4a953b9792223125792be9981ee69b8bfafe0e2867
  
Dropped by
MD5 94b759dafed20cfaa1b8aed076cbddae

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