MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 155240d8bf35cc3a5c6b2703440162da4cdeca7d3faab01e656a4b401e2eb15d. 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: 155240d8bf35cc3a5c6b2703440162da4cdeca7d3faab01e656a4b401e2eb15d
SHA3-384 hash: 80c8786cda38bdd190af1849fd783f4369cab1e93739af958dff4abe5f2c7ef55f3986abdeebbfc5797c2f0e27903db0
SHA1 hash: b03ae14977597fcb9e091ec8b9c6875a9c21d455
MD5 hash: 0ffd72eec6cba70da080f56fca50afbe
humanhash: oklahoma-video-california-table
File name:isoHost.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:259'996 bytes
First seen:2023-08-21 07:43:57 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash 61259b55b8912888e90f516ca08dc514 (1'059 x Formbook, 741 x AgentTesla, 429 x GuLoader)
ssdeep 6144:/Ya6cV5hOjPq2FBHZweADX/t3uN6LUxiIGmIV+VwgB9Ed:/YSV5SPqkNZwxIHiIGmIV+vB9I
Threatray 3'727 similar samples on MalwareBazaar
TLSH T162441290BAF4C4EFC4730B710C36876659E6D91664B8875763606B0A797A301EECEF32
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 JAMESWT_WT
Tags:exe FormBook oliwas-xyz sy22

Intelligence

File Origin
# of uploads :
1
# of downloads :
315
Origin country :
IT IT
Vendor Threat Intelligence
Malware family:
formbook
Create hunting rule
ID:
1
File name:
isoHost.exe
Verdict:
Malicious activity
Analysis date:
2023-08-21 07:47:58 UTC
Tags:
formbook xloader
Link:
https://app.any.run/tasks/6382499a-4011-4d34-aef5-9ebfcc363804

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/443916/
Detection(s):
Sanesecurity.Malware.28885.BadCo.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
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
Launching a process
Сreating synchronization primitives
Launching cmd.exe command interpreter
Searching for synchronization primitives
Setting browser functions hooks
Unauthorized injection to a system process
Unauthorized injection to a browser process
Result
Malware family:
n/a
Score:
  5/10
Tags:
n/a
Link:
https://dragonfly.certego.net/analysis/108195/overview
Behaviour
MalwareBazaar
Gathering data
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
Link:
https://www.hybrid-analysis.com/sample/155240d8bf35cc3a5c6b2703440162da4cdeca7d3faab01e656a4b401e2eb15d
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/34f8439f-6db5-419e-8730-90920ab24458
Result
Threat name:
FormBook, NSISDropper
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1294354
Signature
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Detected unpacking (changes PE section rights)
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)
Modifies the prolog of user mode functions (user mode inline hooks)
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 detect virtualization through RDTSC time measurements
Uses netstat to query active network connections and open ports
Yara detected FormBook
Yara detected NSISDropper
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 1294354 Sample: isoHost.exe Startdate: 21/08/2023 Architecture: WINDOWS Score: 100 36 Snort IDS alert for network traffic 2->36 38 Found malware configuration 2->38 40 Malicious sample detected (through community Yara rule) 2->40 42 8 other signatures 2->42 10 isoHost.exe 18 2->10         started        process3 file4 28 C:\Users\user\AppData\...\oonvfcnbyf.dll, PE32 10->28 dropped 54 Detected unpacking (changes PE section rights) 10->54 56 Maps a DLL or memory area into another process 10->56 58 Tries to detect virtualization through RDTSC time measurements 10->58 14 isoHost.exe 10->14         started        signatures5 process6 signatures7 60 Modifies the context of a thread in another process (thread injection) 14->60 62 Maps a DLL or memory area into another process 14->62 64 Sample uses process hollowing technique 14->64 66 Queues an APC in another process (thread injection) 14->66 17 explorer.exe 3 6 14->17 injected process8 dnsIp9 30 www.thwmlohr.click 43.154.67.170, 49757, 80 LILLY-ASUS Japan 17->30 32 www.kwamitikki.com 195.216.243.33, 49756, 80 DDOS-GUARDRU United Kingdom 17->32 34 14 other IPs or domains 17->34 44 System process connects to network (likely due to code injection or exploit) 17->44 46 Uses netstat to query active network connections and open ports 17->46 21 NETSTAT.EXE 17->21         started        signatures10 process11 signatures12 48 Modifies the context of a thread in another process (thread injection) 21->48 50 Maps a DLL or memory area into another process 21->50 52 Tries to detect virtualization through RDTSC time measurements 21->52 24 cmd.exe 1 21->24         started        process13 process14 26 conhost.exe 24->26         started       
Detection:
formbook
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Link:
https://mwdb.cert.pl/sample/155240d8bf35cc3a5c6b2703440162da4cdeca7d3faab01e656a4b401e2eb15d/
Threat name:
Win32.Trojan.Vigorf
Create hunting rule
Status:
Malicious
First seen:
2023-08-21 07:44:04 UTC
File Type:
PE (Exe)
Extracted files:
3
AV detection:
21 of 24 (87.50%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=cvjebwf7gxgduxdle4buialc3jgn5st5h6vlahtfnjfuahrowfoq._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Similar samples:
1a4a833905ed2b06f990054eee77c7f92d536d52797c6a18de6d1358e25e8e03
Formbook
23a0504b8ac3cb1b913d15da848866607a4c617b8bbb5555a71962a6cffadeed
Formbook
328dcb82382c5fb34a7f5a4892cfbdeec6e990551f3ebdcdcfec98e70b0b0327
Formbook
4a1e3a03026f57a6364b645bc8e05e1d7cc9d0fe8fe7ddbf6eb57ee4288fbb57
Formbook
85176443ab1c87d4387378979a276b860b6306e6ae17749d0a1072111cc14a1b
Formbook
9bc85e2d8b9379ab4b4a7a165602aa01a3251bd131a10d3cc67f494c3a46aced
Formbook
ab81345f141fa4d777d142a4f8367c53e9840897bc2b4c3299a4f6696a46296d
Formbook
e3643d141c0e87b3304f3b015f1e8dbbbe273e9a8bb93906991fe61a3073f891
Formbook
+ 3'717 additional samples on MalwareBazaar
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook campaign:sy22 rat spyware stealer trojan
Link:
https://tria.ge/reports/230821-jktlcabf27/
Behaviour
Gathers network information
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Suspicious use of SetThreadContext
Deletes itself
Loads dropped DLL
Formbook payload
Formbook
Unpacked files
SH256 hash:
f1913fec1a1369388f0b2a1125e19b134667adf471f3adcc97b6970fb70fdd29
MD5 hash:
c41f67fda9429fd0deaeb8b56bb555ba
SHA1 hash:
e30e2eb2cc93a266b950c9ccaa11f488e98ed56c
Link:
https://www.unpac.me/results/35ac74e5-7565-4972-a0e8-6eccd4a0d847/
SH256 hash:
155240d8bf35cc3a5c6b2703440162da4cdeca7d3faab01e656a4b401e2eb15d
MD5 hash:
0ffd72eec6cba70da080f56fca50afbe
SHA1 hash:
b03ae14977597fcb9e091ec8b9c6875a9c21d455
Link:
https://www.unpac.me/results/35ac74e5-7565-4972-a0e8-6eccd4a0d847/
Malware family:
FormBook
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/155240d8bf35/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/155240d8bf35cc3a5c6b2703440162da4cdeca7d3faab01e656a4b401e2eb15d

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
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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.

Web download

Formbook

Executable exe 155240d8bf35cc3a5c6b2703440162da4cdeca7d3faab01e656a4b401e2eb15d

(this sample)

Cape
Cape
https://www.capesandbox.com/analysis/443916/
  
URLhaus
https://urlhaus.abuse.ch/url/2705864/
  
Delivery method
Distributed via web download

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