MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 ff344e635b268090aafdb8fa830e76c41f34d7cf9a9bf03ed4ede2705008bfef. 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: 15


Intelligence 15 IOCs YARA 3 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: ff344e635b268090aafdb8fa830e76c41f34d7cf9a9bf03ed4ede2705008bfef
SHA3-384 hash: bba5659e9d40cde686859f9f422efafcd67a12478b722ee878b9041771998558215cf2cf6b7a335922fb881808f19be6
SHA1 hash: 99e8f263f9e34ad13cb8cd6af1bb816deffb5bde
MD5 hash: 16f7045eebb451234ca8078222c5994c
humanhash: minnesota-colorado-yankee-oklahoma
File name:Factura de proforma.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:495'616 bytes
First seen:2021-10-13 18:20:35 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'740 x AgentTesla, 19'599 x Formbook, 12'241 x SnakeKeylogger)
ssdeep 12288:x0K9jbtvzZPJukNeFrmndcPeGGUQSB/a:xh/plBlMFrleGfdB/
Threatray 10'430 similar samples on MalwareBazaar
TLSH T184B4CFA47F85DC4EF36A9CB81131DF44DB2D664A3713C625D9BE607AD2AC7842CC2287
File icon (PE):PE icon
dhash icon 88a28e9494aa94d2 (14 x AgentTesla, 5 x Formbook, 2 x AsyncRAT)
Reporter abuse_ch
Tags:ESP exe FormBook geo

Intelligence

File Origin
# of uploads :
1
# of downloads :
329
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
Factura de proforma.exe
Verdict:
Malicious activity
Analysis date:
2021-10-13 19:14:12 UTC
Tags:
trojan formbook stealer
Link:
https://app.any.run/tasks/41d6ced3-6ae6-49db-9240-ee6287c2c890

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/197363/
Detection(s):
SecuriteInfo.com.BackDoor.SpyBotNET.25.26027.20993.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/61672391fd35fe780c3ddbab/reports/1029ffef-79f5-4ee7-9f23-434670ad9b78/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:
Formbook
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/e2784d8e-8b58-445d-973f-84cc68301153
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/869926
Signature
.NET source code contains potential unpacker
C2 URLs / IPs found in malware configuration
Found malware configuration
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)
Performs DNS queries to domains with low reputation
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
Sigma detected: Bad Opsec Defaults Sacrificial Processes With Improper Arguments
System process connects to network (likely due to code injection or exploit)
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Tries to detect virtualization through RDTSC time measurements
Uses schtasks.exe or at.exe to add and modify task schedules
Yara detected AntiVM3
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 502357 Sample: Factura de proforma.exe Startdate: 13/10/2021 Architecture: WINDOWS Score: 100 36 www.new-post-vehicle-site.xyz 2->36 38 www.festival-du-chanvre.com 2->38 46 Found malware configuration 2->46 48 Malicious sample detected (through community Yara rule) 2->48 50 Yara detected AntiVM3 2->50 52 8 other signatures 2->52 11 Factura de proforma.exe 10 2->11         started        signatures3 process4 file5 32 C:\Users\user\AppData\Local\...\tmpD689.tmp, XML 11->32 dropped 34 C:\Users\user\AppData\...\tskpCbAwtxoaw.exe, PE32 11->34 dropped 14 RegSvcs.exe 11->14         started        17 schtasks.exe 1 11->17         started        process6 signatures7 62 Modifies the context of a thread in another process (thread injection) 14->62 64 Maps a DLL or memory area into another process 14->64 66 Sample uses process hollowing technique 14->66 68 2 other signatures 14->68 19 explorer.exe 14->19 injected 23 conhost.exe 17->23         started        process8 dnsIp9 40 parking3.dnstool.net 13.209.99.177, 49806, 80 AMAZON-02US United States 19->40 42 www.palmonlae.space 19->42 44 www.aminobalm.com 19->44 54 System process connects to network (likely due to code injection or exploit) 19->54 25 cscript.exe 19->25         started        signatures10 process11 signatures12 56 Modifies the context of a thread in another process (thread injection) 25->56 58 Maps a DLL or memory area into another process 25->58 60 Tries to detect virtualization through RDTSC time measurements 25->60 28 cmd.exe 1 25->28         started        process13 process14 30 conhost.exe 28->30         started       
Detection:
formbook
Create hunting rule
Link:
https://mwdb.cert.pl/sample/ff344e635b268090aafdb8fa830e76c41f34d7cf9a9bf03ed4ede2705008bfef/
Threat name:
ByteCode-MSIL.Backdoor.NanoBot
Create hunting rule
Status:
Malicious
First seen:
2021-10-13 18:28:54 UTC
AV detection:
9 of 39 (23.08%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=742e4y23e2ajbkx5xd5igdtwyqptjv6ptkn7apwu5xrhauaix7xq._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Similar samples:
5f3ccb49e66ef3bf10ec0a226360f55238063c739154cb131407ff02d0706e67
Formbook
5fd22c8bf1e7e06ccaa6ebc23410086fe0e3bc30b1613cd6ee734f280c0d6979
Formbook
6c0e85b84f2b1dfdb580a168386ad91efe7f734066ff3a12a0d359fcb4711dca
Formbook
7c0ab1d837684e8d37e75578f4821e25d7729cb9d3739f397cabbb9c95f2ddae
Formbook
7c7e7d1ad3f8afd0ffcba163bac7c1df9ceb8202a96a61b30b697569e00051b0
Formbook
afb0dcb294330abe26a2e2611f36441607a878844a251bea8be3e9407e238ad8
Formbook
c63cb761da677849b8382eb1d926569f00a04d57f2c789b63e7f2eb2e368a00c
Formbook
dcee55c9896715272cfd344a7a62fe6c5dbe0e61d7d8548beeda46c15bd8e07c
Formbook
+ 10'420 additional samples on MalwareBazaar
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook campaign:cb3b rat spyware stealer trojan
Link:
https://tria.ge/reports/211013-wzb13aehh8/
Behaviour
Creates scheduled task(s)
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
Suspicious use of SendNotifyMessage
Suspicious use of UnmapMainImage
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Suspicious use of SetThreadContext
Formbook Payload
Formbook
Malware Config
C2 Extraction:
http://www.thefanlounge.com/cb3b/
Unpacked files
SH256 hash:
c6e68d6acf81aa9ae9ed2dfbc1362c274b5812c1fcf3b9444ce56021725f39ac
MD5 hash:
9656d6ce415ca2665017e14a6949fc82
SHA1 hash:
995032fdaa1938378423a6f1d98f3ad8e12c3092
Detections:
win_formbook_g0
Create hunting rule
win_formbook_auto
Create hunting rule
Link:
https://www.unpac.me/results/d36feabb-e787-4313-ab1c-c20fb59a9038/
Parent samples :
6c0e85b84f2b1dfdb580a168386ad91efe7f734066ff3a12a0d359fcb4711dca
afb0dcb294330abe26a2e2611f36441607a878844a251bea8be3e9407e238ad8
ff344e635b268090aafdb8fa830e76c41f34d7cf9a9bf03ed4ede2705008bfef
ba1dc7d4d7eb9f21c8be72fbc9f0bb247806cbcebe96a4c00a68ebf071471ad2
SH256 hash:
6cffb8f6eb7c56c766c78df92b6508101ea788f969b07096851aea6fa2091069
MD5 hash:
ca348f322c4301511bf00e32588960b9
SHA1 hash:
f615669f41f57f7a3e1bd3c20bdca7bdb8f39b0a
Link:
https://www.unpac.me/results/d36feabb-e787-4313-ab1c-c20fb59a9038/
SH256 hash:
eda4d687b865aed0078ab87078de7d9722888b2d2af71c6fc0dcdc986ffb7567
MD5 hash:
12cf5402be16590c300b442a66e9ebc1
SHA1 hash:
0ea28394d301ca1ce840f039d2da62a5ce6d9334
Link:
https://www.unpac.me/results/d36feabb-e787-4313-ab1c-c20fb59a9038/
SH256 hash:
ff344e635b268090aafdb8fa830e76c41f34d7cf9a9bf03ed4ede2705008bfef
MD5 hash:
16f7045eebb451234ca8078222c5994c
SHA1 hash:
99e8f263f9e34ad13cb8cd6af1bb816deffb5bde
Link:
https://www.unpac.me/results/d36feabb-e787-4313-ab1c-c20fb59a9038/
Malware family:
FormBook
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/ff344e635b26/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/ff344e635b268090aafdb8fa830e76c41f34d7cf9a9bf03ed4ede2705008bfef

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:pe_imphash
Create hunting rule
Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash

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/197363/

Comments