MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b12c23f3cf0937291c634f1505ca5123dc08363dcc0f766ac029b1238cade11d. 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: 10


Intelligence 10 IOCs YARA 3 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: b12c23f3cf0937291c634f1505ca5123dc08363dcc0f766ac029b1238cade11d
SHA3-384 hash: 3d31ece8365530fdbe68c2ee3193c7d4653edfea50224ad9c6a0c81d636b7a7de9c2785af77cea1ddbdf948eed69c98b
SHA1 hash: b12b7a877682838b5b1673ee4783bbf44eba4863
MD5 hash: 09d635e7fac13ca49037a27ffa10cdbf
humanhash: muppet-neptune-ack-oranges
File name:MY0025007022.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:69'120 bytes
First seen:2022-07-25 08:44:55 UTC
Last seen:2022-07-25 09:52:14 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'666 x AgentTesla, 19'479 x Formbook, 12'209 x SnakeKeylogger)
ssdeep 384:YdG7SmQCreM4JaN9tOw0yefY2ch4Hy9QYv9:YvCrTjLjew2ch4HOQYv9
TLSH T11E634083AE5C822BFDFD3F3118D1553003A792889CB19A6FAF44786DE9532570D23768
TrID 72.5% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
10.4% (.EXE) Win64 Executable (generic) (10523/12/4)
6.5% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
4.4% (.EXE) Win32 Executable (generic) (4505/5/1)
2.0% (.EXE) OS/2 Executable (generic) (2029/13)
File icon (PE):PE icon
dhash icon 9b317d4d4d55412b (7 x Formbook, 1 x AgentTesla)
Reporter cocaman
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
2
# of downloads :
256
Origin country :
n/a
Vendor Threat Intelligence
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/293919/
Detection(s):
ditekSHen.MALWARE.Win.Trojan.AsyncRAT.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Сreating synchronization primitives
DNS request
Sending an HTTP GET request
Launching a process
Creating a process with a hidden window
Launching cmd.exe command interpreter
Unauthorized injection to a system process
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
packed
Link:
https://www.filescan.io/uploads/62de5823cfc305167689dd53/reports/6e611e6a-3e56-482e-b116-0fa401cda4a3/overview
Result
Verdict:
UNKNOWN
Details
Windows PE Executable
Found a Windows Portable Executable (PE) binary. Depending on context, the presence of a binary is suspicious or malicious.
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/05a07d76-d9c2-4ddf-ad2d-de075839f9ac
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1040233
Signature
.NET source code contains potential unpacker
Allocates memory in foreign processes
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Creates an undocumented autostart registry key
Drops executable to a common third party application directory
Encrypted powershell cmdline option found
Injects a PE file into a foreign processes
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 dropped file
Multi AV Scanner detection for submitted file
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
Tries to detect virtualization through RDTSC time measurements
Writes to foreign memory regions
Yara detected FormBook
Yara detected Generic Downloader
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 672727 Sample: MY0025007022.exe Startdate: 25/07/2022 Architecture: WINDOWS Score: 100 39 Malicious sample detected (through community Yara rule) 2->39 41 Antivirus detection for URL or domain 2->41 43 Antivirus detection for dropped file 2->43 45 10 other signatures 2->45 10 MY0025007022.exe 15 7 2->10         started        process3 dnsIp4 37 mnsemesta1.com 162.241.123.17, 49737, 80 UNIFIEDLAYER-AS-1US United States 10->37 31 C:\Users\user\AppData\Roaming\...\cloud.exe, PE32 10->31 dropped 33 C:\Users\user\...\cloud.exe:Zone.Identifier, ASCII 10->33 dropped 35 C:\Users\user\...\MY0025007022.exe.log, ASCII 10->35 dropped 53 Creates an undocumented autostart registry key 10->53 55 Encrypted powershell cmdline option found 10->55 57 Writes to foreign memory regions 10->57 59 3 other signatures 10->59 15 MSBuild.exe 10->15         started        18 powershell.exe 15 10->18         started        file5 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 2 other signatures 15->67 20 explorer.exe 15->20 injected 22 conhost.exe 18->22         started        process9 process10 24 wlanext.exe 20->24         started        signatures11 47 Modifies the context of a thread in another process (thread injection) 24->47 49 Maps a DLL or memory area into another process 24->49 51 Tries to detect virtualization through RDTSC time measurements 24->51 27 cmd.exe 1 24->27         started        process12 process13 29 conhost.exe 27->29         started       
Detection:
formbook
Create hunting rule
Link:
https://mwdb.cert.pl/sample/b12c23f3cf0937291c634f1505ca5123dc08363dcc0f766ac029b1238cade11d/
Threat name:
ByteCode-MSIL.Trojan.Leonem
Create hunting rule
Status:
Malicious
First seen:
2022-07-25 04:53:15 UTC
File Type:
PE (.Net Exe)
Extracted files:
4
AV detection:
22 of 26 (84.62%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=wewch46pbe3sshddj4kqlssrepoaqnr5zqhxm2wafgyshdfn4eoq._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook campaign:fs44 rat spyware stealer trojan
Link:
https://tria.ge/reports/220725-knqvasahc3/
Behaviour
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
Checks computer location settings
Formbook payload
Formbook
Unpacked files
SH256 hash:
b12c23f3cf0937291c634f1505ca5123dc08363dcc0f766ac029b1238cade11d
MD5 hash:
09d635e7fac13ca49037a27ffa10cdbf
SHA1 hash:
b12b7a877682838b5b1673ee4783bbf44eba4863
Link:
https://www.unpac.me/results/9ecd8886-e3b7-436e-8a52-2de5ed267cdf/
Malware family:
FormBook
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/b12c23f3cf09/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Suspicious File
Score:
0.35
Link:
https://yomi.yoroi.company/submissions/b12c23f3cf0937291c634f1505ca5123dc08363dcc0f766ac029b1238cade11d

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:MALWARE_Win_AsyncRAT
Create hunting rule
Author:ditekSHen
Description:Detects AsyncRAT
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.

Malspam

Formbook

zip 4c3ef62fadfcb2add42105636653251735afa0c6de4ab4fd61287e35580d97e7

Formbook

Executable exe b12c23f3cf0937291c634f1505ca5123dc08363dcc0f766ac029b1238cade11d

(this sample)

  
Delivery method
Other
  
Dropped by
SHA256 4c3ef62fadfcb2add42105636653251735afa0c6de4ab4fd61287e35580d97e7
Cape
Cape
https://www.capesandbox.com/analysis/293919/
  
Dropped by
MD5 6e11f965f7dd2978919e2f4b46c1b389

Comments