MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 a03ebb1ad2450b07206923043ad865cb83e1d4798a9273704a9626854fd17399. 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 3 File information Comments 1
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: a03ebb1ad2450b07206923043ad865cb83e1d4798a9273704a9626854fd17399
SHA3-384 hash: cb1a380e23600ae0bef830a0505fe2b0b74a5d678448ed04ae6534fe960eb50173c85c24defc347ba9aef8ee3948e0f2
SHA1 hash: e3ce2d0fc9bd18ab30d589f052edce9ca410f2ee
MD5 hash: a1c4645815d0ab06831f62042cfa0da0
humanhash: one-carpet-steak-asparagus
File name:a1c4645815d0ab06831f62042cfa0da0
Download: download sample
Signature Formbook
Create hunting rule
File size:1'586'688 bytes
First seen:2021-08-13 08:28:20 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'652 x AgentTesla, 19'463 x Formbook, 12'204 x SnakeKeylogger)
ssdeep 24576:4SZIpRCJh5KhAEoaPMRfyT43jJ3cYp9KnZZS5R0:ApR0cjoaPM5yCJ3ck923B
Threatray 7'759 similar samples on MalwareBazaar
TLSH T169755C3D19B92637C0A5C6758AE18817F0409CAF35D1A9BC94C67F66C3F2A5335832EE
dhash icon 0c3269d44569300c (17 x AgentTesla, 8 x Formbook, 7 x SnakeKeylogger)
Reporter zbetcheckin
Tags:32 exe FormBook

Intelligence

File Origin
# of uploads :
1
# of downloads :
258
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
C83HFG47849030H83.xlsx
Verdict:
Malicious activity
Analysis date:
2021-08-13 07:42:40 UTC
Tags:
encrypted exploit CVE-2017-11882 loader
Link:
https://app.any.run/tasks/07fbcb54-eae4-4178-91a7-39dc6f123b40

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/178936/
Detection(s):
SecuriteInfo.com.Trojan.Siggen14.59996.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
DNS request
Sending a UDP request
Using the Windows Management Instrumentation requests
Creating a file
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/affeec5c-8525-42e1-bc06-570be6d3dc56
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/832240
Signature
.NET source code contains very large strings
Antivirus detection for URL or domain
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)
Modifies the prolog of user mode functions (user mode inline hooks)
Multi AV Scanner detection for submitted file
Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines)
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
Sigma detected: CMSTP Execution Process Creation
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: 464673 Sample: n2zqlutoQ9 Startdate: 13/08/2021 Architecture: WINDOWS Score: 100 33 www.miscdr.net 2->33 35 miscdr.net 2->35 43 Found malware configuration 2->43 45 Malicious sample detected (through community Yara rule) 2->45 47 Antivirus detection for URL or domain 2->47 49 9 other signatures 2->49 11 n2zqlutoQ9.exe 3 2->11         started        signatures3 process4 file5 31 C:\Users\user\AppData\...\n2zqlutoQ9.exe.log, ASCII 11->31 dropped 59 Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines) 11->59 61 Tries to detect virtualization through RDTSC time measurements 11->61 63 Injects a PE file into a foreign processes 11->63 15 n2zqlutoQ9.exe 11->15         started        18 n2zqlutoQ9.exe 11->18         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 20 explorer.exe 15->20 injected process9 dnsIp10 37 brooksranchhomes.com 184.168.131.241, 49749, 80 AS-26496-GO-DADDY-COM-LLCUS United States 20->37 39 www.twzhhq.com 20->39 41 www.brooksranchhomes.com 20->41 51 System process connects to network (likely due to code injection or exploit) 20->51 24 cmstp.exe 20->24         started        signatures11 process12 signatures13 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/a03ebb1ad2450b07206923043ad865cb83e1d4798a9273704a9626854fd17399/
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2021-08-13 05:14:53 UTC
AV detection:
16 of 46 (34.78%)
Threat level:
  5/5
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Similar samples:
049f2bcbaa6d18cf9ee22b12c47ba8578c938d04df6d35a3c4cd3ed81fdcf4ab
Formbook
17dddb2e6db0aa7d67c0e63f1129dde91f471fb6c5ce41d1e1574d8403ecd1ad
Formbook
1bb79d3f58130c38c2d1c54737aaa69bfdf5693cf6177efaac78377020b86ad6
Formbook
2f4d0e2ce90ab2c35dcba4c85e38346eae6ac2cef0f939ccdd21cade4d6343ca
Formbook
38acc90cd6d33b61b99cca8cf06781e1bd2ab8ffebc3a33e036eca36037d413b
Formbook
55d713c0259fec5f0e64aa9f01d63ee1db90b60960e3b61b11e36bf1cd0fd2f1
Formbook
5e8297dde5b002b5304bf70d6e33db9bbd40cda37f0e02edaddd732657f6ac32
Formbook
96e8216c941bcea44a0c6d68019cec29c0bc8bf58cc8a20d61fbbf286c0f3ddd
Formbook
e65ddcb1e8d85b5d13ab1aaf5d9747feea1e3e442ed82773640d740627f4d7ca
Formbook
f10508b4bd982e597771e6128fede0b532c42cb799ac495c922940c27a942dbe
Formbook
+ 7'749 additional samples on MalwareBazaar
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook campaign:nff evasion rat spyware stealer trojan
Link:
https://tria.ge/reports/210813-q7em11a4hj/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Suspicious use of SetThreadContext
Maps connected drives based on registry
Checks BIOS information in registry
Looks for VMWare Tools registry key
Formbook Payload
Looks for VirtualBox Guest Additions in registry
Formbook
Malware Config
C2 Extraction:
http://www.yellow-wink.com/nff/
Unpacked files
SH256 hash:
33ac6b8012ce739e72022086b5d39b7fc030c20fa72988f76957685509d5c041
MD5 hash:
83f8ae95a7e6f016f6b00482588086e6
SHA1 hash:
70392939d6d60a913b51084ec1d98eaae8ca4868
Link:
https://www.unpac.me/results/4ec626d7-87d4-442d-beff-b69aecb853ce/
SH256 hash:
bdc5c1a20fb07fe7eb4fee7f9ebdf6bd0e4fed2dc20232aa47d0c663f8775309
MD5 hash:
e3a12ecbcee7c36bcbd9b114f9bcb37f
SHA1 hash:
ced0e15fa4db2c0d0ca167c250f1c98d0639880d
Link:
https://www.unpac.me/results/4ec626d7-87d4-442d-beff-b69aecb853ce/
SH256 hash:
cefb4fa9d8f118ece98e8e9da00644e3d086058903f64721335b513af69b0892
MD5 hash:
7413d26f5700cfee7acdf5c6f5c5d89c
SHA1 hash:
05906b80d83de78d0bee721893f69be0ceb608a9
Detections:
win_formbook_g0
Create hunting rule
win_formbook_auto
Create hunting rule
Link:
https://www.unpac.me/results/4ec626d7-87d4-442d-beff-b69aecb853ce/
Parent samples :
e65ddcb1e8d85b5d13ab1aaf5d9747feea1e3e442ed82773640d740627f4d7ca
55d713c0259fec5f0e64aa9f01d63ee1db90b60960e3b61b11e36bf1cd0fd2f1
5e8297dde5b002b5304bf70d6e33db9bbd40cda37f0e02edaddd732657f6ac32
a03ebb1ad2450b07206923043ad865cb83e1d4798a9273704a9626854fd17399
a53a4c82477eada893191662cf4ab4b3f44d1da7cae9ea8a7de3f859a424292b
e2c11a82ce76ab32b7033c6d47081c6c44fe2288211fe0af6202f3333196cbe6
SH256 hash:
a03ebb1ad2450b07206923043ad865cb83e1d4798a9273704a9626854fd17399
MD5 hash:
a1c4645815d0ab06831f62042cfa0da0
SHA1 hash:
e3ce2d0fc9bd18ab30d589f052edce9ca410f2ee
Link:
https://www.unpac.me/results/4ec626d7-87d4-442d-beff-b69aecb853ce/
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/a03ebb1ad2450b07206923043ad865cb83e1d4798a9273704a9626854fd17399

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.

Web download

Formbook

Executable exe a03ebb1ad2450b07206923043ad865cb83e1d4798a9273704a9626854fd17399

(this sample)

  
Delivery method
Distributed via web download
  
URLhaus
https://urlhaus.abuse.ch/url/1529989/
Cape
Cape
https://www.capesandbox.com/analysis/178936/

Comments


Avatar
zbet commented on 2021-08-13 08:28:21 UTC

url : hxxp://103.171.0.73/IExplorer/.svchost.exe