MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 a5a279ff939e0031e4c3d74d5605cfe84368628d404829bee3943e2e25ff2809. 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: 17


Intelligence 17 IOCs YARA 1 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: a5a279ff939e0031e4c3d74d5605cfe84368628d404829bee3943e2e25ff2809
SHA3-384 hash: caa7fb8cf50d3f29bf38b2569fde6a6ee785f5b1d70552bb5395b0f9974f5bbd554b7d8e7e246aebeffddc2059722859
SHA1 hash: 75c89a8ac797d812c7c1f42635d2e6bcad238dda
MD5 hash: ad7c048bf4390a48586c4fdbf45409c4
humanhash: rugby-sixteen-hawaii-nineteen
File name:FAT - 0035.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:251'642 bytes
First seen:2023-08-02 15:12:23 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash 61259b55b8912888e90f516ca08dc514 (1'059 x Formbook, 741 x AgentTesla, 427 x GuLoader)
ssdeep 6144:/Ya6fN4PECnrm0nVhMuteDhLKTUALIfmL+u6i7YO:/Y1SP1nV2SeDhLKTfsfmCHi7z
Threatray 3'689 similar samples on MalwareBazaar
TLSH T1A134120079B6D95BD9F61A700D791F577CE6C73624F6872BA3124B68B822383E50DB43
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 b2a89c96a2cada72 (2'283 x Formbook, 981 x Loki, 803 x AgentTesla)
Reporter lowmal3
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
1
# of downloads :
311
Origin country :
DE DE
Vendor Threat Intelligence
Malware family:
formbook
Create hunting rule
ID:
1
File name:
FAT - 0035.exe
Verdict:
Malicious activity
Analysis date:
2023-08-02 15:13:41 UTC
Tags:
formbook xloader stealer spyware opendir
Link:
https://app.any.run/tasks/346ddd4e-00cc-4fad-ad8f-85f8778286a5

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/439864/
Result
Verdict:
Malware
Maliciousness:

Behaviour
Сreating synchronization primitives
Launching cmd.exe command interpreter
Setting browser functions hooks
Creating a file in the %temp% directory
Creating a window
Creating a file
Unauthorized injection to a recently created process
Restart of the analyzed sample
Searching for synchronization primitives
Launching a process
Unauthorized injection to a system process
Unauthorized injection to a browser process
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
control lolbin overlay packed shell32
Link:
https://www.filescan.io/uploads/64ca727ecbfeb5bd5751300c/reports/45ea202c-77a8-4fc3-a181-31fab26e680c/overview
Verdict:
Malicious
Labled as:
Babar.Generic
Link:
https://www.hybrid-analysis.com/sample/a5a279ff939e0031e4c3d74d5605cfe84368628d404829bee3943e2e25ff2809
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/21ba46a5-4131-497e-a6c1-0eba1617fe9e
Result
Threat name:
FormBook, NSISDropper
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1284506
Signature
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Detected unpacking (changes PE section rights)
Found evasive API chain (may stop execution after reading information in the PEB, e.g. number of processors)
Found malware configuration
Machine Learning detection for dropped file
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
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 detect virtualization through RDTSC time measurements
Uses ipconfig to lookup or modify the Windows network settings
Yara detected FormBook
Yara detected NSISDropper
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 1284506 Sample: FAT_-_0035.exe Startdate: 02/08/2023 Architecture: WINDOWS Score: 100 38 Snort IDS alert for network traffic 2->38 40 Found malware configuration 2->40 42 Malicious sample detected (through community Yara rule) 2->42 44 8 other signatures 2->44 10 FAT_-_0035.exe 18 2->10         started        process3 file4 30 C:\Users\user\AppData\Local\...\kzqiqwhb.dll, PE32 10->30 dropped 56 Detected unpacking (changes PE section rights) 10->56 58 Found evasive API chain (may stop execution after reading information in the PEB, e.g. number of processors) 10->58 60 Maps a DLL or memory area into another process 10->60 62 Tries to detect virtualization through RDTSC time measurements 10->62 14 FAT_-_0035.exe 10->14         started        signatures5 process6 signatures7 64 Modifies the context of a thread in another process (thread injection) 14->64 66 Maps a DLL or memory area into another process 14->66 68 Sample uses process hollowing technique 14->68 70 Queues an APC in another process (thread injection) 14->70 17 explorer.exe 1 1 14->17 injected process8 dnsIp9 32 www.weixinrobots.com 103.150.181.71, 49701, 80 NANBIAN-CNNingboNanbianTuoluoXinxiJishuCoLtdCN unknown 17->32 34 shops.myshopify.com 23.227.38.74, 49703, 80 CLOUDFLARENETUS Canada 17->34 36 2 other IPs or domains 17->36 46 System process connects to network (likely due to code injection or exploit) 17->46 48 Uses ipconfig to lookup or modify the Windows network settings 17->48 21 ipconfig.exe 17->21         started        24 autofmt.exe 17->24         started        signatures10 process11 signatures12 50 Modifies the context of a thread in another process (thread injection) 21->50 52 Maps a DLL or memory area into another process 21->52 54 Tries to detect virtualization through RDTSC time measurements 21->54 26 cmd.exe 1 21->26         started        process13 process14 28 conhost.exe 26->28         started       
Detection:
formbook
Create hunting rule
Link:
https://mwdb.cert.pl/sample/a5a279ff939e0031e4c3d74d5605cfe84368628d404829bee3943e2e25ff2809/
Threat name:
Win32.Trojan.FormBook
Create hunting rule
Status:
Malicious
First seen:
2023-08-02 15:13:04 UTC
File Type:
PE (Exe)
Extracted files:
2
AV detection:
19 of 24 (79.17%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=uwrht74ttyaddzgd25gvmbop5bbwqyunibectpxdsq7c4jp7faeq._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Similar samples:
0128e78a9fc3a12e1f247dec90b1de6ed4176587febc5ab0a9dcc0fc3735db0d
Formbook
190ab20809cf0e5dee4860df81f3151e95b23f9840f02ab3e9ad2f7cc02f46d5
Formbook
7bf47a92fadd875caa70db94a8ef153f7e63296357619e23a27b2d4e0a6a2bde
Formbook
8c0d07e1007f0ca5c49e068f7bcf93dbad6b1ed222e1b168183f3705bafc5673
Formbook
aae4507b359991ebb7102b2531f939178db88102ac66b5307e5ea065d94639ea
Formbook
e205d9c4dd9d23e24942ad2d1439821f4fef2b7743e60a9731af35198a95eb5b
Formbook
e8ea13799fe43f6e41e65740f5c4411d534ac481c07d167197f5edb95200add1
Formbook
+ 3'679 additional samples on MalwareBazaar
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook campaign:b0y4 rat spyware stealer trojan
Link:
https://tria.ge/reports/230802-slqeragd51/
Behaviour
Modifies registry class
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of UnmapMainImage
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Suspicious use of SetThreadContext
Deletes itself
Loads dropped DLL
Formbook payload
Formbook
Unpacked files
SH256 hash:
e305ebb144e15f6e6bfd4daed2dca3c348f89eb18c2e83ed1ba39f603a804543
MD5 hash:
ffdb07758a2408d6956f49e7e80bd975
SHA1 hash:
9576297768daa4431b19f9185e4e24eea6bc4c4d
Link:
https://www.unpac.me/results/9f87c353-2f1c-4fd3-8f7d-25b4bd29c871/
SH256 hash:
a5a279ff939e0031e4c3d74d5605cfe84368628d404829bee3943e2e25ff2809
MD5 hash:
ad7c048bf4390a48586c4fdbf45409c4
SHA1 hash:
75c89a8ac797d812c7c1f42635d2e6bcad238dda
Link:
https://www.unpac.me/results/9f87c353-2f1c-4fd3-8f7d-25b4bd29c871/
Malware family:
FormBook
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/a5a279ff939e/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/a5a279ff939e0031e4c3d74d5605cfe84368628d404829bee3943e2e25ff2809

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:shellcode
Create hunting rule
Author:nex
Description:Matched shellcode byte patterns

File information

The table below shows additional information about this malware sample such as delivery method and external references.

Malspam

Formbook

Executable exe a5a279ff939e0031e4c3d74d5605cfe84368628d404829bee3943e2e25ff2809

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/439864/

Comments