MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 c33fd689aaab0c578d7569270d48b3c1fd9c9b28f45d81db6510326d0ddd0475. 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: 14


Intelligence 14 IOCs YARA 5 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: c33fd689aaab0c578d7569270d48b3c1fd9c9b28f45d81db6510326d0ddd0475
SHA3-384 hash: 5bc39665ae19e338bd91bce41ab60752868d6471ab177989dcf4d12ce473fa4a5633093bad4016f2956719df5d7e442e
SHA1 hash: 9b5c5e8da8e835e81a1c7731ecd5b733f02a01f1
MD5 hash: 8bb43432ab55f125c36727002f45ed25
humanhash: wolfram-maine-carolina-minnesota
File name:DOCUMENT.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:536'781 bytes
First seen:2023-01-09 12:52:17 UTC
Last seen:2023-01-11 10:22:28 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash 61259b55b8912888e90f516ca08dc514 (1'059 x Formbook, 741 x AgentTesla, 427 x GuLoader)
ssdeep 12288:mYrn+3Dd8sRhonS6PfUXO4h5KZPCZ2Zr12YAfbgUYi:mYrn+x8s3onS0YO4h5JZ2xAzBYi
Threatray 19'678 similar samples on MalwareBazaar
TLSH T1FEB48A27E1F08476EC81DAB0092742D57C65FFE66B67B24E26813A09FA377D8552C3B0
TrID 47.3% (.EXE) Win32 Executable MS Visual C++ (generic) (31206/45/13)
15.9% (.EXE) Win64 Executable (generic) (10523/12/4)
9.9% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
7.6% (.EXE) Win16 NE executable (generic) (5038/12/1)
6.8% (.EXE) Win32 Executable (generic) (4505/5/1)
File icon (PE):PE icon
dhash icon 52b060f0f0f27082 (1 x Formbook)
Reporter cocaman
Tags:exe FormBook Shipping

Intelligence

File Origin
# of uploads :
4
# of downloads :
189
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
DOCUMENT.exe
Verdict:
Malicious activity
Analysis date:
2023-01-09 12:54:50 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/a9a45873-60a0-483e-8ff8-89107f5149b2

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/351102/
Detection(s):
SecuriteInfo.com.Trojan.NSISX.Spy.Gen.24.12449.21542.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a file in the %temp% directory
Creating a window
Creating a process from a recently created file
Сreating synchronization primitives
Searching for synchronization primitives
Launching a process
DNS request
Sending an HTTP GET request
Reading critical registry keys
Unauthorized injection to a recently created process
Launching the default Windows debugger (dwwin.exe)
Unauthorized injection to a recently created process by context flags manipulation
Forced shutdown of a system process
Stealing user critical data
Unauthorized injection to a system process
Verdict:
No Threat
Threat level:
  2/10
Confidence:
100%
Tags:
overlay packed shell32.dll
Link:
https://www.filescan.io/uploads/63bc0e31dde391056ac18360/reports/fb2bed5f-72d5-4870-a63a-c809f962fd2a/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/fb12c90b-e3a7-47f7-a903-2d7d785d9831
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1147959
Signature
Antivirus detection for URL or domain
Contains functionality to detect sleep reduction / modifications
Found evasive API chain (may stop execution after reading information in the PEB, e.g. number of processors)
Initial sample is a PE file and has a suspicious name
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 dropped file
Multi AV Scanner detection for submitted file
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
Snort IDS alert for network traffic
System process connects to network (likely due to code injection or exploit)
Tries to harvest and steal browser information (history, passwords, etc)
Tries to steal Mail credentials (via file / registry access)
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 780691 Sample: DOCUMENT.exe Startdate: 09/01/2023 Architecture: WINDOWS Score: 100 33 Snort IDS alert for network traffic 2->33 35 Malicious sample detected (through community Yara rule) 2->35 37 Antivirus detection for URL or domain 2->37 39 3 other signatures 2->39 9 DOCUMENT.exe 19 2->9         started        process3 file4 25 C:\Users\user\AppData\...\mnhbxolxal.exe, PE32 9->25 dropped 12 mnhbxolxal.exe 9->12         started        process5 signatures6 51 Multi AV Scanner detection for dropped file 12->51 53 Found evasive API chain (may stop execution after reading information in the PEB, e.g. number of processors) 12->53 55 Maps a DLL or memory area into another process 12->55 57 Contains functionality to detect sleep reduction / modifications 12->57 15 mnhbxolxal.exe 12->15         started        process7 signatures8 59 Modifies the context of a thread in another process (thread injection) 15->59 61 Maps a DLL or memory area into another process 15->61 63 Sample uses process hollowing technique 15->63 65 Queues an APC in another process (thread injection) 15->65 18 explorer.exe 15->18 injected process9 dnsIp10 27 allthekey.com 92.204.219.113, 49714, 49715, 49716 VELIANET-ASvelianetInternetdiensteGmbHDE Germany 18->27 29 www.oktbvector.ru 91.189.114.19, 49717, 49718, 49719 RU-CENTERRU Russian Federation 18->29 31 7 other IPs or domains 18->31 41 System process connects to network (likely due to code injection or exploit) 18->41 22 mstsc.exe 13 18->22         started        signatures11 process12 signatures13 43 Tries to steal Mail credentials (via file / registry access) 22->43 45 Tries to harvest and steal browser information (history, passwords, etc) 22->45 47 Modifies the context of a thread in another process (thread injection) 22->47 49 Maps a DLL or memory area into another process 22->49
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/c33fd689aaab0c578d7569270d48b3c1fd9c9b28f45d81db6510326d0ddd0475/
Threat name:
Win32.Trojan.Leonem
Create hunting rule
Status:
Malicious
First seen:
2023-01-09 09:53:46 UTC
File Type:
PE (Exe)
Extracted files:
3
AV detection:
24 of 38 (63.16%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=ym75ncnkvmgfpdlvnetq2sftyh6zzgzi6roydw3fcazg2do5ar2q._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Similar samples:
1451a0db83b9e0d83eac9a040a5058e9d4aeb54d484c5dae698c3ce0c002ffb0
Formbook
48c2d31acc0c9de4e78cf10a906fb274f9512bf32c221ed5d5272ba98e9f0b44
Formbook
492cabb55a2f649ce32194e8f9737a51f071b370bc9cd527aa8cd0b844ee7ea8
Formbook
61977941b6ece2c52ebec3b2d38b4e3f4b1d4713bd6b3ddb0f0405351e2adce7
Formbook
88b0580ee00c3960e18e05607d37ad78b0b34dc17362d2e98dfe59eb7f3a0a02
Formbook
9d1ee961410bd91109f256fa8d0976d53e2c317e8ef55ad244063adf7865afe1
Formbook
b394bd2bf5686012f76693ff9daddc941662d0c564e4ac4a530ea34b4b0d8cc6
Formbook
c424a21abb01f466b5a9e3ef4b29e33c3cd1419f69e0f8b0a7787bf40ab75271
Formbook
d69b13f1276594f9f10cf722a15179b0d71911a92d15a726e1bdd234a880cf92
Formbook
ea5cc541f270957672194a8f4c941dc614c46082d7d0e5edd64567a510aa6b1b
Formbook
+ 19'668 additional samples on MalwareBazaar
Result
Malware family:
n/a
Score:
  8/10
Tags:
n/a
Link:
https://tria.ge/reports/230109-p4mj2ahf6z/
Behaviour
Modifies Internet Explorer settings
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
Suspicious use of SendNotifyMessage
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Program crash
Suspicious use of SetThreadContext
Checks computer location settings
Loads dropped DLL
Executes dropped EXE
Verdict:
Suspicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/540c80d2-d4ed-42bd-9c96-8e20121bedfe
Unpacked files
SH256 hash:
7c68ba979652e8ba51f3ec892eef4fc352979a54ae1ee36741d841ae5f2c015f
MD5 hash:
6392a12c840855306e8d46b71ee6e73a
SHA1 hash:
64f0e1c726d8dc4b17ea3e383adfa7a9c5a9153a
Link:
https://www.unpac.me/results/ebb6c93a-6af5-4365-b59e-65bf8fced478/
SH256 hash:
c33fd689aaab0c578d7569270d48b3c1fd9c9b28f45d81db6510326d0ddd0475
MD5 hash:
8bb43432ab55f125c36727002f45ed25
SHA1 hash:
9b5c5e8da8e835e81a1c7731ecd5b733f02a01f1
Link:
https://www.unpac.me/results/ebb6c93a-6af5-4365-b59e-65bf8fced478/
Malware family:
XLoader
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/c33fd689aaab/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/c33fd689aaab0c578d7569270d48b3c1fd9c9b28f45d81db6510326d0ddd0475

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:meth_get_eip
Create hunting rule
Author:Willi Ballenthin
Rule name:meth_stackstrings
Create hunting rule
Author:Willi Ballenthin
Rule name:Windows_Trojan_Formbook
Create hunting rule
Author:@malgamy12
Rule name:Windows_Trojan_Formbook_1112e116
Create hunting rule
Author:Elastic Security
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 0d28593b9e3991b7951741c70ba531095cd51dfab73e2bc96a4a5e9858d9be45

Formbook

Executable exe c33fd689aaab0c578d7569270d48b3c1fd9c9b28f45d81db6510326d0ddd0475

(this sample)

  
Delivery method
Other
  
Dropped by
SHA256 0d28593b9e3991b7951741c70ba531095cd51dfab73e2bc96a4a5e9858d9be45
Cape
Cape
https://www.capesandbox.com/analysis/351102/
  
Dropped by
MD5 948fa969aa2726612750266c643277b4

Comments