MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b194903f2fb1231113b2cffdd6cf47e25d4d9f99675654f70865b1f3d0a9160c. 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: 12


Intelligence 12 IOCs YARA 6 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: b194903f2fb1231113b2cffdd6cf47e25d4d9f99675654f70865b1f3d0a9160c
SHA3-384 hash: 9eee6b4668548f82ca9f1daa20da6ab5690e44a46bcafbce369854a51c5bcc088b50727096aa0c4f2f1e7bd72f1337bb
SHA1 hash: 9bf46b95ff700e57bc0e38d5133577bfad260ea2
MD5 hash: bb7bbc40aef8439092e6345d3428c975
humanhash: chicken-dakota-mars-four
File name:ledger.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:763'904 bytes
First seen:2021-09-10 09:23:53 UTC
Last seen:2021-09-10 13:27:02 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'652 x AgentTesla, 19'463 x Formbook, 12'204 x SnakeKeylogger)
ssdeep 12288:Ch9bZ1O3+VUPObK1Cnf2VtYLrlz1+e+LPm2oNsHLOKtswO2g/I1nRzB:ChRZyHwlwm2o6LOKbO2g/QnRz
TLSH T122F427343AEB901DF273FFB95FE474D7AA6FB6633606A45D109003860A23A41DE9153E
Reporter GovCERT_CH
Tags:exe FormBook xloader

Intelligence

File Origin
# of uploads :
5
# of downloads :
252
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
ledger.exe
Verdict:
Malicious activity
Analysis date:
2021-09-10 09:25:13 UTC
Tags:
trojan formbook stealer
Link:
https://app.any.run/tasks/ae3797b3-c538-4ec0-8eda-37b941e7eed7

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/186828/
Detection(s):
SecuriteInfo.com.Variant.Bulz.696671.27352.10022.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Sending a UDP request
Unauthorized injection to a recently created process
Creating a file
Launching a process
Launching cmd.exe command interpreter
Creating a window
Unauthorized injection to a system process
Malware family:
Formbook
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/3b4cdf9f-d25f-4f05-a496-d3ef0c2f3262
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/848685
Signature
.NET source code contains potential unpacker
.NET source code contains very large strings
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
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)
Multi AV Scanner detection for submitted file
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
Yara detected AntiVM3
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 481116 Sample: ledger.exe Startdate: 10/09/2021 Architecture: WINDOWS Score: 100 33 www.feerd.com 2->33 41 Snort IDS alert for network traffic (e.g. based on Emerging Threat rules) 2->41 43 Found malware configuration 2->43 45 Malicious sample detected (through community Yara rule) 2->45 47 9 other signatures 2->47 11 ledger.exe 3 2->11         started        signatures3 process4 file5 31 C:\Users\user\AppData\...\ledger.exe.log, ASCII 11->31 dropped 59 Tries to detect virtualization through RDTSC time measurements 11->59 15 ledger.exe 11->15         started        18 ledger.exe 11->18         started        signatures6 process7 signatures8 61 Modifies the context of a thread in another process (thread injection) 15->61 63 Maps a DLL or memory area into another process 15->63 65 Sample uses process hollowing technique 15->65 67 Queues an APC in another process (thread injection) 15->67 20 explorer.exe 15->20 injected process9 dnsIp10 35 www.arteregalos.com 209.99.40.222, 49824, 80 CONFLUENCE-NETWORK-INCVG United States 20->35 37 biosonicmicrocurrent.com 107.180.2.167, 49825, 80 AS-26496-GO-DADDY-COM-LLCUS United States 20->37 39 8 other IPs or domains 20->39 49 System process connects to network (likely due to code injection or exploit) 20->49 24 systray.exe 20->24         started        signatures11 process12 signatures13 51 Self deletion via cmd delete 24->51 53 Modifies the context of a thread in another process (thread injection) 24->53 55 Maps a DLL or memory area into another process 24->55 57 Tries to detect virtualization through RDTSC time measurements 24->57 27 cmd.exe 1 24->27         started        process14 process15 29 conhost.exe 27->29         started       
Detection:
formbook
Create hunting rule
Link:
https://mwdb.cert.pl/sample/b194903f2fb1231113b2cffdd6cf47e25d4d9f99675654f70865b1f3d0a9160c/
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2021-09-10 07:44:23 UTC
File Type:
PE (.Net Exe)
Extracted files:
18
AV detection:
20 of 45 (44.44%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=wgkjapzpwerrce5sz765nt2h4jou3h4zm5lfj5yimwy7hufjcyga._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Result
Malware family:
xloader
Create hunting rule
Score:
  10/10
Tags:
family:xloader campaign:n58i loader rat suricata
Link:
https://tria.ge/reports/210910-lc3kdschfl/
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 UnmapMainImage
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.biosonicmicrocurrent.com/n58i/
Unpacked files
SH256 hash:
440e5a69d686468780ebd1717a66132f9ff7b50a264b6cfaef36feca05b8fa4d
MD5 hash:
4b5b3556701e15dd7e506ee16abb8b20
SHA1 hash:
d5a5a806a8b8ab544681d7afec1dcee1e9837af8
Detections:
win_formbook_g0
Create hunting rule
win_formbook_auto
Create hunting rule
Link:
https://www.unpac.me/results/1cf4eaeb-9942-416d-a7dd-f96e1d48d9e9/
Parent samples :
61de0ac2005f1345bfb72a35e04d02e41d981e6ffa23944d3b1cae93be22856b
ce5200f83fa5cb0f31b93edbfbc372e3d93bc71450f77ba705b452ca523e24e5
acf3df7da4bdf99226ab8574e15d1145e46e28605afdf660f1fb19b1d061c386
b194903f2fb1231113b2cffdd6cf47e25d4d9f99675654f70865b1f3d0a9160c
SH256 hash:
144d61b7f1ccece8189d9f7dd80c3d2e331f85eabf2e2dac60f20ad3e32436ab
MD5 hash:
5a82414d0a7ed6f6bcbb1b084a7e2b2e
SHA1 hash:
f828485653d11e5851c230c74a72bfff49464726
Link:
https://www.unpac.me/results/1cf4eaeb-9942-416d-a7dd-f96e1d48d9e9/
SH256 hash:
c0ee1071e444f415f8b62856a0896f3b22e563f1bb4f03d14142583efe49a565
MD5 hash:
29db2e114b88ae1f6a00c9aa71690043
SHA1 hash:
ec82db71443556a5b320357b0b8b09e70ec1db9c
Link:
https://www.unpac.me/results/1cf4eaeb-9942-416d-a7dd-f96e1d48d9e9/
SH256 hash:
b194903f2fb1231113b2cffdd6cf47e25d4d9f99675654f70865b1f3d0a9160c
MD5 hash:
bb7bbc40aef8439092e6345d3428c975
SHA1 hash:
9bf46b95ff700e57bc0e38d5133577bfad260ea2
Link:
https://www.unpac.me/results/1cf4eaeb-9942-416d-a7dd-f96e1d48d9e9/
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/b194903f2fb1/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Suspicious File
Score:
0.45
Link:
https://yomi.yoroi.company/submissions/b194903f2fb1231113b2cffdd6cf47e25d4d9f99675654f70865b1f3d0a9160c

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:Formbook
Create hunting rule
Author:JPCERT/CC Incident Response Group
Description:detect Formbook in memory
Reference:internal research
Rule name:INDICATOR_SUSPICIOUS_Stomped_PECompilation_Timestamp_InTheFuture
Create hunting rule
Author:ditekSHen
Description:Detect executables with stomped PE compilation timestamp that is greater than local current time
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
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

Executable exe b194903f2fb1231113b2cffdd6cf47e25d4d9f99675654f70865b1f3d0a9160c

(this sample)

  
Dropped by
xloader
  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/186828/

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