MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 75a4391b44c120e8b7e67e7c8de8d2fc5bd5dd2e4f23c24ee49ada56491dfd23. 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 2 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 75a4391b44c120e8b7e67e7c8de8d2fc5bd5dd2e4f23c24ee49ada56491dfd23
SHA3-384 hash: 0df4cd596134d1953a0035000012e0dc927ce59ff17adc4175814a01ccb56fce93be53f8a66e0deeaa6259e3dbc8a71f
SHA1 hash: 5814f54df3716f2eace019e4830591b849b74f86
MD5 hash: 59dbc3eaecf075aca9d1df869c7caa03
humanhash: sad-blue-nitrogen-leopard
File name:KALU.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:292'960 bytes
First seen:2023-07-27 12:57:25 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash 61259b55b8912888e90f516ca08dc514 (1'059 x Formbook, 741 x AgentTesla, 431 x GuLoader)
ssdeep 6144:vYa69J7ns4jLW380KTy4gkxCcAZDVzdLjwv60fgp:vY/BfjL2wTrWZDD6XIp
Threatray 3'616 similar samples on MalwareBazaar
TLSH T152541298F6E5C1B3E5D30670287B273BEFF8B96600A4166B13A08B9DBA151529D1E720
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 James_inthe_box
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
1
# of downloads :
277
Origin country :
US US
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
KALU.exe
Verdict:
Suspicious activity
Analysis date:
2023-07-27 12:58:35 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/1640935c-465b-4717-9bd3-1794fe29abb4

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/434790/
Detection(s):
Sanesecurity.Malware.28885.BadCo.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Creating a file in the %temp% directory
Creating a window
Creating a file
Creating a file in the %AppData% subdirectories
Unauthorized injection to a recently created process
Restart of the analyzed sample
Сreating synchronization primitives
Sending a custom TCP request
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
control lolbin overlay packed shell32
Link:
https://www.filescan.io/uploads/64c269da1b48787a496f75ee/reports/ba624e22-b059-494d-81d9-5ae2b753bd82/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
Link:
https://www.hybrid-analysis.com/sample/75a4391b44c120e8b7e67e7c8de8d2fc5bd5dd2e4f23c24ee49ada56491dfd23
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/2f3ce205-cad2-4084-840d-5f7466a6d9ba
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1281164
Signature
Antivirus detection for URL or domain
Deletes itself after installation
Detected unpacking (changes PE section rights)
Found evasive API chain (may stop execution after reading information in the PEB, e.g. number of processors)
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)
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Performs DNS queries to domains with low reputation
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: 1281164 Sample: KALU.exe Startdate: 27/07/2023 Architecture: WINDOWS Score: 100 52 Snort IDS alert for network traffic 2->52 54 Malicious sample detected (through community Yara rule) 2->54 56 Antivirus detection for URL or domain 2->56 58 4 other signatures 2->58 9 KALU.exe 1 20 2->9         started        13 dmvrb.exe 18 2->13         started        process3 file4 36 C:\Users\user\AppData\Roaming\...\dmvrb.exe, PE32 9->36 dropped 38 C:\Users\user\AppData\Local\...\vyrgei.dll, PE32 9->38 dropped 76 Detected unpacking (changes PE section rights) 9->76 78 Found evasive API chain (may stop execution after reading information in the PEB, e.g. number of processors) 9->78 80 Maps a DLL or memory area into another process 9->80 15 KALU.exe 9->15         started        40 C:\Users\user\AppData\Local\...\vyrgei.dll, PE32 13->40 dropped 82 Sample uses process hollowing technique 13->82 18 dmvrb.exe 13->18         started        signatures5 process6 signatures7 84 Maps a DLL or memory area into another process 15->84 86 Sample uses process hollowing technique 15->86 88 Queues an APC in another process (thread injection) 15->88 20 dmvrb.exe 18 15->20         started        process8 file9 34 C:\Users\user\AppData\Local\...\vyrgei.dll, PE32 20->34 dropped 60 Multi AV Scanner detection for dropped file 20->60 62 Detected unpacking (changes PE section rights) 20->62 64 Machine Learning detection for dropped file 20->64 66 Maps a DLL or memory area into another process 20->66 24 svchost.exe 13 20->24         started        28 dmvrb.exe 20->28         started        signatures10 process11 dnsIp12 42 www.2584.wtf 24->42 44 192.168.2.1 unknown unknown 24->44 68 System process connects to network (likely due to code injection or exploit) 24->68 70 Tries to steal Mail credentials (via file / registry access) 24->70 72 Tries to harvest and steal browser information (history, passwords, etc) 24->72 74 3 other signatures 24->74 30 explorer.exe 2 1 24->30 injected signatures13 process14 dnsIp15 46 al-shaam-wings-cargo.com 50.87.253.74, 49699, 49700, 49701 UNIFIEDLAYER-AS-1US United States 30->46 48 www.bjqsnh.com 185.228.45.120, 49708, 49709, 49710 QUICKPACKETUS United Kingdom 30->48 50 14 other IPs or domains 30->50 90 System process connects to network (likely due to code injection or exploit) 30->90 92 Performs DNS queries to domains with low reputation 30->92 signatures16
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/75a4391b44c120e8b7e67e7c8de8d2fc5bd5dd2e4f23c24ee49ada56491dfd23/
Threat name:
Win32.Trojan.GuLoader
Create hunting rule
Status:
Malicious
First seen:
2023-07-27 03:42:59 UTC
File Type:
PE (Exe)
Extracted files:
2
AV detection:
25 of 37 (67.57%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=owsdsg2eyeqorn7gpz6i32gs7rn5lxjoj4r4etxetlnfmsi57urq._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
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Formbook
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Formbook
+ 3'606 additional samples on MalwareBazaar
Result
Malware family:
n/a
Score:
  7/10
Tags:
persistence
Link:
https://tria.ge/reports/230727-p7gsysfc4v/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Suspicious use of SetThreadContext
Adds Run key to start application
Checks computer location settings
Loads dropped DLL
Unpacked files
SH256 hash:
75a4391b44c120e8b7e67e7c8de8d2fc5bd5dd2e4f23c24ee49ada56491dfd23
MD5 hash:
59dbc3eaecf075aca9d1df869c7caa03
SHA1 hash:
5814f54df3716f2eace019e4830591b849b74f86
Link:
https://www.unpac.me/results/fd213fdb-0bbb-4b62-95b4-370a05daac6a/
Malware family:
XLoader
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/75a4391b44c1/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/75a4391b44c120e8b7e67e7c8de8d2fc5bd5dd2e4f23c24ee49ada56491dfd23

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: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.

  
Delivery method
Other
Cape
Cape
https://www.capesandbox.com/analysis/434790/

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