MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 7c2acb3028bf8aaafdd5f24e68320427107d0598c07f61e2ac1a6e81f3357d87. 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: 13


Intelligence 13 IOCs YARA 2 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 7c2acb3028bf8aaafdd5f24e68320427107d0598c07f61e2ac1a6e81f3357d87
SHA3-384 hash: 7951e21dfc90ddeae79135a2bee8596d9b41a58cfe281df9ae2699fcc9006cce9fab3a2255327056fdc82706408e8657
SHA1 hash: 43e3939fb86555167b2150f99b4369c6de4fb6ba
MD5 hash: b7947f8837a133edeb7c0efa8418d32d
humanhash: bravo-victor-social-ink
File name:z4AMOSTRA.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:2'595'909 bytes
First seen:2024-07-16 11:27:23 UTC
Last seen:2024-07-24 16:36:47 UTC
File type:Executable exe
MIME type:application/x-dosexec
ssdeep 12288:BVKQ1YBwLCWaUNl1awKhniyWDqThZrGTAEoPBPIW2i3Yka2UyGg:BRY21gli9qNQTAdZPIW2FYjGg
Threatray 11 similar samples on MalwareBazaar
TLSH T132C512493647AC1BFE6940B9E9C430F22AFC8D6331F54B5FEF018D92B45267D0A0867A
TrID 44.4% (.EXE) Win64 Executable (generic) (10523/12/4)
21.3% (.EXE) Win16 NE executable (generic) (5038/12/1)
8.7% (.ICL) Windows Icons Library (generic) (2059/9)
8.5% (.EXE) OS/2 Executable (generic) (2029/13)
8.4% (.EXE) Generic Win/DOS Executable (2002/3)
Reporter FXOLabs
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
5
# of downloads :
358
Origin country :
BR BR
Vendor Threat Intelligence
Detection(s):
SecuriteInfo.com.Trojan.Inject5.6331.23232.29477.UNOFFICIAL
Create hunting rule

Verdict:
Malicious
Score:
99.9%
Link:
https://cyber-fortress.com/docs/result/index.php?id=669659472c29bed579a4799dwin7simulatehigh_evasion
Tags:
Banker Encryption Execution Generic Network Dexter
Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Creating a window
Сreating synchronization primitives
Creating a process with a hidden window
Launching a process
Searching for synchronization primitives
Launching the default Windows debugger (dwwin.exe)
Blocking the User Account Control
Unauthorized injection to a recently created process
Unauthorized injection to a recently created process by context flags manipulation
Adding an exclusion to Microsoft Defender
Unauthorized injection to a system process
Enabling autorun
Verdict:
No Threat
Threat level:
  10/10
Confidence:
100%
Tags:
overlay vbnet
Link:
https://www.filescan.io/uploads/6696594af921a99b935533fd/reports/025dadd0-8dfc-4425-a212-73a3a7851ecc/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_90%
Link:
https://www.hybrid-analysis.com/sample/7c2acb3028bf8aaafdd5f24e68320427107d0598c07f61e2ac1a6e81f3357d87
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/f2933b79-07a6-4912-8874-f6edf0dbe790
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1474159
Signature
Adds a directory exclusion to Windows Defender
AI detected suspicious sample
Allocates memory in foreign processes
Disables UAC (registry)
Found direct / indirect Syscall (likely to bypass EDR)
Injects a PE file into a foreign processes
Loading BitLocker PowerShell Module
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 domain / URL
Multi AV Scanner detection for submitted file
Queues an APC in another process (thread injection)
Sigma detected: Powershell Base64 Encoded MpPreference Cmdlet
Sigma detected: Wab/Wabmig Unusual Parent Or Child Processes
Switches to a custom stack to bypass stack traces
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Tries to harvest and steal browser information (history, passwords, etc)
Tries to steal Mail credentials (via file / registry access)
Writes to foreign memory regions
Yara detected AntiVM3
Yara detected FormBook
Yara detected UAC Bypass using CMSTP
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1474159 Sample: z4AMOSTRA.exe Startdate: 16/07/2024 Architecture: WINDOWS Score: 100 47 www.vacaturecast.com 2->47 49 www.r7xzr3ib0.sbs 2->49 51 14 other IPs or domains 2->51 59 Multi AV Scanner detection for domain / URL 2->59 61 Malicious sample detected (through community Yara rule) 2->61 63 Multi AV Scanner detection for submitted file 2->63 65 7 other signatures 2->65 10 z4AMOSTRA.exe 1 4 2->10         started        13 wab.exe 3 1 2->13         started        15 rundll32.exe 2->15         started        17 wab.exe 2->17         started        signatures3 process4 signatures5 81 Tries to detect sandboxes and other dynamic analysis tools (process name or module or function) 10->81 83 Writes to foreign memory regions 10->83 85 Allocates memory in foreign processes 10->85 87 3 other signatures 10->87 19 wab.exe 10->19         started        22 powershell.exe 23 10->22         started        24 WerFault.exe 22 16 10->24         started        27 conhost.exe 10->27         started        process6 file7 67 Maps a DLL or memory area into another process 19->67 29 zTSbVFGZKHlfVnARpXaIlKtUWfeoCR.exe 19->29 injected 69 Loading BitLocker PowerShell Module 22->69 32 WmiPrvSE.exe 22->32         started        34 conhost.exe 22->34         started        45 C:\ProgramData\Microsoft\...\Report.wer, Unicode 24->45 dropped signatures8 process9 signatures10 89 Found direct / indirect Syscall (likely to bypass EDR) 29->89 36 SecEdit.exe 1 13 29->36         started        process11 signatures12 71 Tries to steal Mail credentials (via file / registry access) 36->71 73 Tries to harvest and steal browser information (history, passwords, etc) 36->73 75 Modifies the context of a thread in another process (thread injection) 36->75 77 3 other signatures 36->77 39 zTSbVFGZKHlfVnARpXaIlKtUWfeoCR.exe 36->39 injected 43 firefox.exe 36->43         started        process13 dnsIp14 53 www.drivemktg.co 193.108.130.23, 49737, 49738, 49739 SVK-ASCZ Russian Federation 39->53 55 parkingpage.namecheap.com 91.195.240.19, 49755, 49756, 49757 SEDO-ASDE Germany 39->55 57 6 other IPs or domains 39->57 79 Found direct / indirect Syscall (likely to bypass EDR) 39->79 signatures15
Score:
99%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/7c2acb3028bf8aaafdd5f24e68320427107d0598c07f61e2ac1a6e81f3357d87
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/7c2acb3028bf8aaafdd5f24e68320427107d0598c07f61e2ac1a6e81f3357d87/
Threat name:
Win64.Trojan.Leonem
Create hunting rule
Status:
Malicious
First seen:
2024-07-16 10:40:31 UTC
File Type:
PE+ (.Net Exe)
Extracted files:
1
AV detection:
24 of 38 (63.16%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=pqvmwmbix6fkv7ov6jhgqmqee4ih2bmyyb7wdyvmdjxid4zvpwdq._file
Verdict:
malicious
Similar samples:
1451c68c7ebf1fea00bf4505bd1929c395bdfc3c629e0cedcc91b2770f2e2c54
Formbook
46497b500d1ac359803b9781904a38016d5288c319893a47e04cefe92eb0fe09
Formbook
73f05c2e81609669d10849fc0c8d9750775adc3e7ec7f118b4e9f254ac1d2825
Formbook
c5ad319799d36151e0d328dc73736af67d2ea201bb57c39573cffabf9e2792d0
Formbook
cb33e0ca459992181558d42ed14c41439ec525941ce40beff1a2c43bc95faee5
Formbook
d852f4642f75bbaa7c0aa90e6aba7761db295baa418eeb42da5a7ca22be2a4d4
Formbook
+ 1 additional samples on MalwareBazaar
Result
Malware family:
n/a
Score:
  10/10
Tags:
evasion execution persistence trojan
Link:
https://tria.ge/reports/240716-nkz6cashmg/
Behaviour
Modifies Internet Explorer settings
Runs regedit.exe
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of UnmapMainImage
Suspicious use of WriteProcessMemory
System policy modification
Enumerates physical storage devices
Suspicious use of SetThreadContext
Adds Run key to start application
Checks whether UAC is enabled
Checks computer location settings
Windows security modification
Adds policy Run key to start application
Command and Scripting Interpreter: PowerShell
UAC bypass
Windows security bypass
Verdict:
Suspicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/58fa048b-52a1-4155-858e-ecdf1786df6f
Unpacked files
SH256 hash:
7c2acb3028bf8aaafdd5f24e68320427107d0598c07f61e2ac1a6e81f3357d87
MD5 hash:
b7947f8837a133edeb7c0efa8418d32d
SHA1 hash:
43e3939fb86555167b2150f99b4369c6de4fb6ba
Link:
https://www.unpac.me/results/61624a3e-a23e-443c-b2ce-2ce145333558/
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/7c2acb3028bf/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Suspicious File
Score:
0.49
Link:
https://yomi.yoroi.company/submissions/7c2acb3028bf8aaafdd5f24e68320427107d0598c07f61e2ac1a6e81f3357d87

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:pe_no_import_table
Create hunting rule
Description:Detect pe file that no import table

File information

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

Malspam

Formbook

Executable exe 7c2acb3028bf8aaafdd5f24e68320427107d0598c07f61e2ac1a6e81f3357d87

(this sample)

  
Delivery method
Distributed via e-mail attachment

BLint

The following table provides more information about this file using BLint. BLint is a Binary Linter to check the security properties, and capabilities in executables.

Findings
IDTitleSeverity
CHECK_AUTHENTICODEMissing Authenticodehigh
CHECK_DLL_CHARACTERISTICSMissing dll Security Characteristics (GUARD_CF)high

Comments