MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 99cbf8420f8b393dd010f7332f2d0b52b2316961f2b29b298639eef737de2ebf. 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: 99cbf8420f8b393dd010f7332f2d0b52b2316961f2b29b298639eef737de2ebf
SHA3-384 hash: b0c95e22f2044e5c53ca2ebaa017a71a63a04407ad1c54cea291478a0557cb7679e98a75af88d60e48355c73a38c8dc9
SHA1 hash: e2ba5b21ac0564fb03d958630f6fc76f7205355d
MD5 hash: 42042164b5b04cc1d6659e89c45bc91d
humanhash: item-hotel-lima-thirteen
File name:Fatura.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:996'864 bytes
First seen:2021-12-08 10:42:24 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'662 x AgentTesla, 19'474 x Formbook, 12'208 x SnakeKeylogger)
ssdeep 24576:TamvMwgfP6Z+9dMTLYNsCnG5e1WwN9g/UvLpXEsSebxPWCgzF2XOFrOE:TmwO6Z+9WTLYo5emmpU+1FcF+OF
Threatray 12'801 similar samples on MalwareBazaar
TLSH T1252512AD76D366CCC6A483B23B79D074113A3D37A81BC19CE9AA358F4933B443973616
Reporter GovCERT_CH
Tags:exe FormBook xloader

Intelligence

File Origin
# of uploads :
1
# of downloads :
163
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
Fatura.exe
Verdict:
Malicious activity
Analysis date:
2021-12-08 10:45:08 UTC
Tags:
trojan formbook stealer
Link:
https://app.any.run/tasks/3bd547e7-ac4c-43bc-864f-3ea16320b3ec

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/212440/
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
DNS request
Unauthorized injection to a recently created process
Creating a file
Сreating synchronization primitives
Launching a process
Launching cmd.exe command interpreter
Unauthorized injection to a system process
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
formbook obfuscated packed
Link:
https://www.filescan.io/uploads/61b08c3947ed217c0135a7ed/reports/63d9a142-efa2-4eb5-8177-4b6eb268254f/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.
Malware family:
Formbook
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/485a1f83-3165-471e-8054-ccd7b1be71d6
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/903767
Signature
.NET source code contains potential unpacker
C2 URLs / IPs found in malware configuration
Found malware configuration
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
Modifies the context of a thread in another process (thread injection)
Multi AV Scanner detection for submitted file
Performs DNS queries to domains with low reputation
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
Self deletion via cmd delete
Snort IDS alert for network traffic (e.g. based on Emerging Threat rules)
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 netsh to modify the Windows network and firewall settings
Yara detected AntiVM3
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 536245 Sample: Fatura.exe Startdate: 08/12/2021 Architecture: WINDOWS Score: 100 31 www.ndzlc.com 2->31 39 Snort IDS alert for network traffic (e.g. based on Emerging Threat rules) 2->39 41 Found malware configuration 2->41 43 Malicious sample detected (through community Yara rule) 2->43 45 7 other signatures 2->45 11 Fatura.exe 3 2->11         started        signatures3 process4 file5 29 C:\Users\user\AppData\...\Fatura.exe.log, ASCII 11->29 dropped 61 Tries to detect virtualization through RDTSC time measurements 11->61 63 Injects a PE file into a foreign processes 11->63 15 Fatura.exe 11->15         started        signatures6 process7 signatures8 65 Modifies the context of a thread in another process (thread injection) 15->65 67 Maps a DLL or memory area into another process 15->67 69 Sample uses process hollowing technique 15->69 71 Queues an APC in another process (thread injection) 15->71 18 explorer.exe 15->18 injected process9 dnsIp10 33 www.bjhyc.net 54.38.220.85, 49797, 80 OVHFR France 18->33 35 weedgecko.com 208.82.114.175, 49837, 80 NDCHOSTUS United States 18->35 37 12 other IPs or domains 18->37 47 System process connects to network (likely due to code injection or exploit) 18->47 49 Performs DNS queries to domains with low reputation 18->49 51 Uses netsh to modify the Windows network and firewall settings 18->51 22 netsh.exe 18->22         started        signatures11 process12 signatures13 53 Self deletion via cmd delete 22->53 55 Modifies the context of a thread in another process (thread injection) 22->55 57 Maps a DLL or memory area into another process 22->57 59 Tries to detect virtualization through RDTSC time measurements 22->59 25 cmd.exe 1 22->25         started        process14 process15 27 conhost.exe 25->27         started       
Detection:
xloader
Create hunting rule
Link:
https://mwdb.cert.pl/sample/99cbf8420f8b393dd010f7332f2d0b52b2316961f2b29b298639eef737de2ebf/
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2021-12-07 22:46:00 UTC
File Type:
PE (.Net Exe)
Extracted files:
25
AV detection:
20 of 28 (71.43%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=thf7qqqprm4t3uaq64zs6lilkkzdc2lb6kzjwkmghhxpon66f27q._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Similar samples:
15e4f50b213a1cc5545dd4a173eabfed7f2ea6019117fdc374ef1514632bdb55
Formbook
248b6eeee418dfa9bfae299491cc483275e1820f001b7b21ab6cd29a762e2a34
Formbook
47e997e572407a3a805deaa7e7bca8d20990f23901c7199f1add2e550763dbf5
Formbook
48f6e66bd79f4963bd12037988a93f1708a63e4caa7e17a0ba7cc11fdb90076b
Formbook
733d497a01920cda976dbb7008a4bbf8f1ad7e2e6935a72ac16c060f0beffc5e
Formbook
7415f5e7f8ae4514ca13ec7ae4e3b4005e93c63eaba82d03048de5f60eb784fa
Formbook
b85b17dc8f9e09356da1c51e8c2d71bbdbaadcaaac9bc00e61635f8b03db2d4a
Formbook
dce5f044b1f4396f33c3574667169dcbdeb3aebb037c9f53d7a8c38e095f576d
Formbook
e146d9fee7645fc19d995f9d018cac7d0070acf5399128b8435e8532df423921
Formbook
eaf218715117371fe47edcccb82a303ad73b2aa8c491018e96167877fea125a8
Formbook
+ 12'791 additional samples on MalwareBazaar
Result
Malware family:
xloader
Create hunting rule
Score:
  10/10
Tags:
family:xloader campaign:ecus loader rat suricata
Link:
https://tria.ge/reports/211208-mr9gxshgaj/
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
Suspicious use of SetThreadContext
Deletes itself
Xloader Payload
Xloader
suricata: ET MALWARE FormBook CnC Checkin (GET)
Malware Config
C2 Extraction:
http://www.ptintelligence.com/ecus/
Unpacked files
SH256 hash:
a1c60715bf9f282366fd05e069d08d4271661880af8ef1955cb5981764709b48
MD5 hash:
48cdff0ba4a45842701ebbf1e8cce5de
SHA1 hash:
89d512fc942cca21959319ab96c1de3725138105
Detections:
win_formbook_g0
Create hunting rule
win_formbook_auto
Create hunting rule
Link:
https://www.unpac.me/results/7ee19e94-1550-4467-87e1-92e6a9485b7a/
Parent samples :
dce5f044b1f4396f33c3574667169dcbdeb3aebb037c9f53d7a8c38e095f576d
7415f5e7f8ae4514ca13ec7ae4e3b4005e93c63eaba82d03048de5f60eb784fa
47e997e572407a3a805deaa7e7bca8d20990f23901c7199f1add2e550763dbf5
733d497a01920cda976dbb7008a4bbf8f1ad7e2e6935a72ac16c060f0beffc5e
f57a283465e1965bd586936e894031d903ce7f721f8b02069e83cd8f19734a4a
248b6eeee418dfa9bfae299491cc483275e1820f001b7b21ab6cd29a762e2a34
99cbf8420f8b393dd010f7332f2d0b52b2316961f2b29b298639eef737de2ebf
SH256 hash:
4e511b448170dff0c5dd93fe5cc538a884850f2b50e0c1204fa3d58d1105ba9e
MD5 hash:
7c17ecc7c6b5d197e4a18faf939b66c7
SHA1 hash:
c96d5e402b49ca39438c01d468e6ad302872154f
Link:
https://www.unpac.me/results/7ee19e94-1550-4467-87e1-92e6a9485b7a/
SH256 hash:
80855df0d7e7629d1f16cfecb7270f7db3ae6c1e32973803330862e531e69a53
MD5 hash:
2ee37952c40f8681eb58af6196d117da
SHA1 hash:
10f1c59089e1485b1440a47fbde89172dd000a29
Link:
https://www.unpac.me/results/7ee19e94-1550-4467-87e1-92e6a9485b7a/
SH256 hash:
99cbf8420f8b393dd010f7332f2d0b52b2316961f2b29b298639eef737de2ebf
MD5 hash:
42042164b5b04cc1d6659e89c45bc91d
SHA1 hash:
e2ba5b21ac0564fb03d958630f6fc76f7205355d
Link:
https://www.unpac.me/results/7ee19e94-1550-4467-87e1-92e6a9485b7a/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
0.81
Link:
https://yomi.yoroi.company/submissions/99cbf8420f8b393dd010f7332f2d0b52b2316961f2b29b298639eef737de2ebf

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.

Malspam

Formbook

Executable exe 99cbf8420f8b393dd010f7332f2d0b52b2316961f2b29b298639eef737de2ebf

(this sample)

  
Dropped by
xloader
  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/212440/

Comments