MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b2d76e91d736201b7e8fb9780594693cfc3106285a4886e9b40007fdd7e56359. 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 17 File information Comments
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SHA256 hash: b2d76e91d736201b7e8fb9780594693cfc3106285a4886e9b40007fdd7e56359
SHA3-384 hash: 407c603d600549b7fd184f228593099fcbdb4642e7b2d6e46f0cedbe38bad9502bd13d9c845db00bf02e507ee939dff8
SHA1 hash: 11aa2f0448e47835ec84f975c13b9bdb762e7ad3
MD5 hash: c1d14a0b29a7f3829d1361363ec2e9b1
humanhash: equal-white-north-fish
File name:PO23043_.EXE
Download: download sample
Signature Formbook
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File size:321'458 bytes
First seen:2023-08-28 14:37:53 UTC
Last seen:2023-08-28 15:35:02 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash 61259b55b8912888e90f516ca08dc514 (1'059 x Formbook, 741 x AgentTesla, 427 x GuLoader)
ssdeep 6144:zYa6/oSLCCe6xEoeELdWc9K4TDRnqoW/U6k33K9uuo:zYZre6xEohLNJTDRniG3XN
TLSH T1A4641202E3A1D537E9B326B26D36A72B3EDDDB540A71C75B1B802E98B513111EE0E713
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 cccccc94d4d8f0b4 (1 x Formbook)
Reporter malwarelabnet
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
2
# of downloads :
353
Origin country :
CA CA
Vendor Threat Intelligence
Malware family:
formbook
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ID:
1
File name:
PO23043_.EXE
Verdict:
Malicious activity
Analysis date:
2023-08-28 14:44:28 UTC
Tags:
formbook xloader
Link:
https://app.any.run/tasks/b81aab65-c294-42ea-a9ff-387f2eb53a8d

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
Formbook
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Link:
https://www.capesandbox.com/analysis/444957/
Detection(s):
SecuriteInfo.com.FileRepMalware.21365.27738.UNOFFICIAL
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Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a file in the %temp% directory
Creating a window
Creating a process from a recently created file
Launching a process
Сreating synchronization primitives
Launching cmd.exe command interpreter
Sending a custom TCP request
Setting browser functions hooks
Unauthorized injection to a recently created process
Unauthorized injection to a recently created process by context flags manipulation
Unauthorized injection to a system process
Unauthorized injection to a browser process
Gathering data
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
control lolbin masquerade overlay packed shell32
Link:
https://www.filescan.io/uploads/64ecb14b7444d2eb09f294bc/reports/1703766e-24ff-4e84-a2ee-6d6a2f55de4d/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
Link:
https://www.hybrid-analysis.com/sample/b2d76e91d736201b7e8fb9780594693cfc3106285a4886e9b40007fdd7e56359
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
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Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/595ce39e-580c-40f3-a6fb-32388e534bb2
Result
Threat name:
FormBook, NSISDropper
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Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1298809
Signature
Antivirus / Scanner detection for submitted sample
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
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
Yara detected FormBook
Yara detected NSISDropper
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 1298809 Sample: PO23043_.EXE.exe Startdate: 28/08/2023 Architecture: WINDOWS Score: 100 50 Snort IDS alert for network traffic 2->50 52 Found malware configuration 2->52 54 Malicious sample detected (through community Yara rule) 2->54 56 7 other signatures 2->56 11 PO23043_.EXE.exe 18 2->11         started        process3 file4 32 C:\Users\user\AppData\Local\...\nxbcmmta.exe, PE32 11->32 dropped 14 nxbcmmta.exe 11->14         started        process5 signatures6 66 Multi AV Scanner detection for dropped file 14->66 68 Detected unpacking (changes PE section rights) 14->68 70 Machine Learning detection for dropped file 14->70 72 3 other signatures 14->72 17 nxbcmmta.exe 14->17         started        process7 signatures8 42 Modifies the context of a thread in another process (thread injection) 17->42 44 Maps a DLL or memory area into another process 17->44 46 Sample uses process hollowing technique 17->46 48 Queues an APC in another process (thread injection) 17->48 20 explorer.exe 1 17->20 injected process9 dnsIp10 34 sarthaksrishticreation.com 119.18.49.69, 49733, 80 PUBLIC-DOMAIN-REGISTRYUS India 20->34 36 www.91967.net 20.205.142.141, 49776, 80 MICROSOFT-CORP-MSN-AS-BLOCKUS United States 20->36 38 2 other IPs or domains 20->38 58 System process connects to network (likely due to code injection or exploit) 20->58 24 systray.exe 12 20->24         started        signatures11 process12 dnsIp13 40 www.jizihao1.com 24->40 60 Modifies the context of a thread in another process (thread injection) 24->60 62 Maps a DLL or memory area into another process 24->62 64 Tries to detect virtualization through RDTSC time measurements 24->64 28 cmd.exe 1 24->28         started        signatures14 process15 process16 30 conhost.exe 28->30         started       
Detection:
formbook
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Link:
https://mwdb.cert.pl/sample/b2d76e91d736201b7e8fb9780594693cfc3106285a4886e9b40007fdd7e56359/
Threat name:
Win32.Trojan.Leonem
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Status:
Malicious
First seen:
2023-08-28 14:38:05 UTC
File Type:
PE (Exe)
Extracted files:
3
AV detection:
18 of 23 (78.26%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=wllw5eoxgyqbw7upxf4alfdjht6dcbriljein2nuaad73v7fmnmq._file
Verdict:
malicious
Label(s):
formbook
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Result
Malware family:
formbook
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Score:
  10/10
Tags:
family:formbook campaign:sy22 rat spyware stealer trojan
Link:
https://tria.ge/reports/230828-rzqf8sbf95/
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
Executes dropped EXE
Loads dropped DLL
Formbook payload
Formbook
Unpacked files
SH256 hash:
784a645c5182553682714915342285633521ec9127c5bdbc93dc8d381e8e9000
MD5 hash:
92a4d1b9f1502d49331f26198f50af02
SHA1 hash:
8efb3f2b2ea6371ff6758c3e730e8d53f62d7bd2
Link:
https://www.unpac.me/results/951e0423-95ce-463a-acee-60d210ad694a/
SH256 hash:
b2d76e91d736201b7e8fb9780594693cfc3106285a4886e9b40007fdd7e56359
MD5 hash:
c1d14a0b29a7f3829d1361363ec2e9b1
SHA1 hash:
11aa2f0448e47835ec84f975c13b9bdb762e7ad3
Link:
https://www.unpac.me/results/951e0423-95ce-463a-acee-60d210ad694a/
Malware family:
FormBook
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Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/b2d76e91d736/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/b2d76e91d736201b7e8fb9780594693cfc3106285a4886e9b40007fdd7e56359

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:DebuggerCheck__GlobalFlags
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Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerCheck__QueryInfo
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerHiding__Active
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerHiding__Thread
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:maldoc_find_kernel32_base_method_1
Create hunting rule
Author:Didier Stevens (https://DidierStevens.com)
Rule name:maldoc_getEIP_method_1
Create hunting rule
Author:Didier Stevens (https://DidierStevens.com)
Rule name:MD5_Constants
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Author:phoul (@phoul)
Description:Look for MD5 constants
Rule name:meth_get_eip
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Author:Willi Ballenthin
Rule name:meth_stackstrings
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Author:Willi Ballenthin
Rule name:RIPEMD160_Constants
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Author:phoul (@phoul)
Description:Look for RIPEMD-160 constants
Rule name:SEH__vectored
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Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:SHA1_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for SHA1 constants
Rule name:shellcode
Create hunting rule
Author:nex
Description:Matched shellcode byte patterns
Rule name:Windows_Trojan_Formbook
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Author:@malgamy12
Rule name:Windows_Trojan_Formbook_1112e116
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Author:Elastic Security
Rule name:win_formbook_auto
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Author:Felix Bilstein - yara-signator at cocacoding dot com
Description:Detects win.formbook.
Rule name:win_formbook_w0
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Author:@malgamy12

File information

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

Cape
Cape
https://www.capesandbox.com/analysis/444957/

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