MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 4a85bac71b81338df2e724c587995e231dfc0b32b004cfea253b8d94422cc4ba. 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: 19


Intelligence 19 IOCs YARA 6 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 4a85bac71b81338df2e724c587995e231dfc0b32b004cfea253b8d94422cc4ba
SHA3-384 hash: 5bcbb7e4a8b176184afce5ce3a289582d7a0151e1290359cdd4290d3a0d7e323dcadf2c5dd8ace24d0cbb3a5e0343e1f
SHA1 hash: 1fe1597be441315cb76e8bfddf97c2344a5d206a
MD5 hash: b333b741b51e1fa861d44c2846939182
humanhash: music-nebraska-floor-blossom
File name:brief nr. 001150_51_2024-11-19_134943.docx.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:1'111'552 bytes
First seen:2024-11-25 12:38:06 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash 3d95adbf13bbe79dc24dccb401c12091 (881 x AgentTesla, 737 x FormBook, 236 x SnakeKeylogger)
ssdeep 24576:ctb20pkaCqT5TBWgNQ7a6Vjaab/dPQVW0hFdc6A:FVg5tQ7a6VeGV0WWFC5
Threatray 3'662 similar samples on MalwareBazaar
TLSH T1C235BF1373DD8361C7B25273BA66B701AEBF782506A1F56B2FD4093DE920122521EB73
TrID 68.8% (.CPL) Windows Control Panel Item (generic) (57583/11/19)
12.5% (.EXE) Win64 Executable (generic) (10522/11/4)
6.0% (.EXE) Win16 NE executable (generic) (5038/12/1)
5.3% (.EXE) Win32 Executable (generic) (4504/4/1)
2.4% (.EXE) OS/2 Executable (generic) (2029/13)
Magika pebin
File icon (PE):PE icon
dhash icon aae2f3e38383b629 (2'034 x Formbook, 1'183 x CredentialFlusher, 666 x AgentTesla)
Reporter adrian__luca
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
1
# of downloads :
383
Origin country :
HU HU
Vendor Threat Intelligence
Malware family:
formbook
Create hunting rule
ID:
1
File name:
brief nr. 001150_51_2024-11-19_134943.docx.exe
Verdict:
Malicious activity
Analysis date:
2024-11-25 13:05:44 UTC
Tags:
autoit formbook xloader
Link:
https://app.any.run/tasks/c3af4475-87cd-4f09-ac40-a5176d55ffb9

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
SecuriteInfo.com.PSW.Agent.BORA.UNOFFICIAL
Create hunting rule

Verdict:
Malicious
Score:
96.5%
Link:
https://cyber-fortress.com/docs/result/index.php?id=67446fecd0583382434b0a08
Tags:
underscore autoit emotet
Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Creating a window
Creating a file in the %temp% directory
Launching a process
Сreating synchronization primitives
Launching cmd.exe command interpreter
Setting browser functions hooks
Unauthorized injection to a system process
Unauthorized injection to a browser process
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
autoit bladabindi compiled-script control evasive fingerprint formbook infostealer keylogger lolbin masquerade microsoft_visual_cc packed packed packer_detected regedit schtasks
Link:
https://www.filescan.io/uploads/67446ff25798a7dfe82bcf0d/reports/71dfbefd-1c55-4360-95c5-c16ba3d4ce74/overview
Verdict:
Malicious
Labled as:
Trojan.Generic
Link:
https://www.hybrid-analysis.com/sample/4a85bac71b81338df2e724c587995e231dfc0b32b004cfea253b8d94422cc4ba
Malware family:
Formbook
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/e636ca26-1a6f-4109-83ba-00dd44f14a41
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1562319
Signature
AI detected suspicious sample
Antivirus detection for URL or domain
Binary is likely a compiled AutoIt script file
C2 URLs / IPs found in malware configuration
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 submitted file
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
Sigma detected: Suspicious Double Extension File Execution
Switches to a custom stack to bypass stack traces
Tries to detect virtualization through RDTSC time measurements
Writes to foreign memory regions
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1562319 Sample: brief nr. 001150_51_2024-11... Startdate: 25/11/2024 Architecture: WINDOWS Score: 100 26 www.unluoren.top 2->26 28 www.narchists.info 2->28 30 3 other IPs or domains 2->30 32 Found malware configuration 2->32 34 Malicious sample detected (through community Yara rule) 2->34 36 Antivirus detection for URL or domain 2->36 38 9 other signatures 2->38 11 brief nr. 001150_51_2024-11-19_134943.docx.exe 2 2->11         started        signatures3 process4 signatures5 48 Binary is likely a compiled AutoIt script file 11->48 50 Writes to foreign memory regions 11->50 52 Maps a DLL or memory area into another process 11->52 14 svchost.exe 11->14         started        process6 signatures7 54 Modifies the context of a thread in another process (thread injection) 14->54 56 Maps a DLL or memory area into another process 14->56 58 Sample uses process hollowing technique 14->58 60 3 other signatures 14->60 17 explorer.exe 34 1 14->17 injected process8 process9 19 help.exe 17->19         started        signatures10 40 Modifies the context of a thread in another process (thread injection) 19->40 42 Maps a DLL or memory area into another process 19->42 44 Tries to detect virtualization through RDTSC time measurements 19->44 46 Switches to a custom stack to bypass stack traces 19->46 22 cmd.exe 1 19->22         started        process11 process12 24 conhost.exe 22->24         started       
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/4a85bac71b81338df2e724c587995e231dfc0b32b004cfea253b8d94422cc4ba
Detection:
formbook
Create hunting rule
Link:
https://mwdb.cert.pl/sample/4a85bac71b81338df2e724c587995e231dfc0b32b004cfea253b8d94422cc4ba/
Threat name:
Win32.Trojan.AutoitInject
Create hunting rule
Status:
Malicious
First seen:
2024-11-19 05:20:43 UTC
File Type:
PE (Exe)
Extracted files:
27
AV detection:
23 of 38 (60.53%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=jkc3vry3qezy34xhetcypgk6emo7yczswacm72rfhogziqrmys5a._file
Verdict:
malicious
Label(s):
unknown_loader_036
Create hunting rule
formbook
Create hunting rule
autoit
Create hunting rule
Similar samples:
25f9e7390d3253b571e3da642f57fcaeabd6dbf38c068379931ca657cc25c23a
Formbook
28dbe468fda05030a239bd0f554cb207c31edd37b12b930a357dd43e265e67ad
Formbook
2e3fefb790f0aba5b0e8162081c037ed5035c2722fd318d928d94cfee57d110c
Formbook
9d119e13c731d90fa65a23f934bb8d76d2d23eb444cb35b24f889cfd3bafc59e
Formbook
dcb0dbfb5714fc8d31fb3ac35f060092959f1450655eac659d6f4ff36c3c790d
Formbook
+ 3'652 additional samples on MalwareBazaar
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook campaign:ud04 discovery rat spyware stealer trojan
Link:
https://tria.ge/reports/241125-pvl7xatkgj/
Behaviour
Gathers network information
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
Suspicious use of SendNotifyMessage
Suspicious use of WriteProcessMemory
System Location Discovery: System Language Discovery
Suspicious use of SetThreadContext
Formbook payload
Formbook
Formbook family
Verdict:
Suspicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/3acbaf75-008b-4ba9-a592-c4c524c7ed20
Unpacked files
SH256 hash:
aff941430c111bb53330ebdb49970fd0c6e61bba9221812748b8463c5102723f
MD5 hash:
3039c9ab5f8f027f779ad83fcb7fef93
SHA1 hash:
22954bfa7212eb01a7e039edff656e08a1e3c501
Detections:
FormBook
Create hunting rule
win_formbook_auto
Create hunting rule
win_formbook_g0
Create hunting rule
win_formbook_w0
Create hunting rule
Formbook
Create hunting rule
Windows_Trojan_Formbook
Create hunting rule
Link:
https://www.unpac.me/results/bea94be9-de66-47c2-a5f8-440e5041c313/
Parent samples :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 hash:
4a85bac71b81338df2e724c587995e231dfc0b32b004cfea253b8d94422cc4ba
MD5 hash:
b333b741b51e1fa861d44c2846939182
SHA1 hash:
1fe1597be441315cb76e8bfddf97c2344a5d206a
Link:
https://www.unpac.me/results/bea94be9-de66-47c2-a5f8-440e5041c313/
Malware family:
FormBook
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/4a85bac71b81/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/4a85bac71b81338df2e724c587995e231dfc0b32b004cfea253b8d94422cc4ba

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:AutoIT_Compiled
Create hunting rule
Author:@bartblaze
Description:Identifies compiled AutoIT script (as EXE). This rule by itself does NOT necessarily mean the detected file is malicious.
Rule name:DebuggerCheck__API
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:RansomPyShield_Antiransomware
Create hunting rule
Author:XiAnzheng
Description:Check for Suspicious String and Import combination that Ransomware mostly abuse(can create FP)
Rule name:Sus_Obf_Enc_Spoof_Hide_PE
Create hunting rule
Author:XiAnzheng
Description:Check for Overlay, Obfuscating, Encrypting, Spoofing, Hiding, or Entropy Technique(can create FP)
Rule name:YahLover
Create hunting rule
Author:Kevin Falcoz
Description:YahLover

File information

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

Malspam

Formbook

Executable exe 4a85bac71b81338df2e724c587995e231dfc0b32b004cfea253b8d94422cc4ba

(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 (HIGH_ENTROPY_VA)high
CHECK_NXMissing Non-Executable Memory Protectioncritical
Reviews
IDCapabilitiesEvidence
AUTH_APIManipulates User AuthorizationADVAPI32.dll::AllocateAndInitializeSid
ADVAPI32.dll::CopySid
ADVAPI32.dll::FreeSid
ADVAPI32.dll::GetLengthSid
ADVAPI32.dll::GetTokenInformation
ADVAPI32.dll::GetAce
COM_BASE_APICan Download & Execute componentsole32.dll::CLSIDFromProgID
ole32.dll::CoCreateInstance
ole32.dll::CoCreateInstanceEx
ole32.dll::CoInitializeSecurity
ole32.dll::CreateStreamOnHGlobal
MULTIMEDIA_APICan Play MultimediaWINMM.dll::mciSendStringW
WINMM.dll::timeGetTime
WINMM.dll::waveOutSetVolume
SECURITY_BASE_APIUses Security Base APIADVAPI32.dll::AddAce
ADVAPI32.dll::AdjustTokenPrivileges
ADVAPI32.dll::CheckTokenMembership
ADVAPI32.dll::DuplicateTokenEx
ADVAPI32.dll::GetAclInformation
ADVAPI32.dll::GetSecurityDescriptorDacl
SHELL_APIManipulates System ShellSHELL32.dll::ShellExecuteExW
SHELL32.dll::ShellExecuteW
SHELL32.dll::SHFileOperationW
WIN32_PROCESS_APICan Create Process and ThreadsADVAPI32.dll::CreateProcessAsUserW
KERNEL32.dll::CreateProcessW
ADVAPI32.dll::CreateProcessWithLogonW
KERNEL32.dll::OpenProcess
ADVAPI32.dll::OpenProcessToken
ADVAPI32.dll::OpenThreadToken
WIN_BASE_APIUses Win Base APIKERNEL32.dll::TerminateProcess
KERNEL32.dll::SetSystemPowerState
KERNEL32.dll::LoadLibraryA
KERNEL32.dll::LoadLibraryExW
KERNEL32.dll::LoadLibraryW
KERNEL32.dll::GetDriveTypeW
WIN_BASE_EXEC_APICan Execute other programsKERNEL32.dll::WriteConsoleW
KERNEL32.dll::ReadConsoleW
KERNEL32.dll::SetStdHandle
KERNEL32.dll::GetConsoleCP
KERNEL32.dll::GetConsoleMode
WIN_BASE_IO_APICan Create FilesKERNEL32.dll::CopyFileW
KERNEL32.dll::CreateDirectoryW
KERNEL32.dll::CreateHardLinkW
IPHLPAPI.DLL::IcmpCreateFile
KERNEL32.dll::CreateFileW
KERNEL32.dll::DeleteFileW
WIN_BASE_USER_APIRetrieves Account InformationKERNEL32.dll::GetComputerNameW
ADVAPI32.dll::GetUserNameW
ADVAPI32.dll::LogonUserW
ADVAPI32.dll::LookupPrivilegeValueW
WIN_NETWORK_APISupports Windows NetworkingMPR.dll::WNetAddConnection2W
MPR.dll::WNetUseConnectionW
WIN_REG_APICan Manipulate Windows RegistryADVAPI32.dll::RegConnectRegistryW
ADVAPI32.dll::RegCreateKeyExW
ADVAPI32.dll::RegDeleteKeyW
ADVAPI32.dll::RegOpenKeyExW
ADVAPI32.dll::RegQueryValueExW
ADVAPI32.dll::RegSetValueExW
WIN_USER_APIPerforms GUI ActionsUSER32.dll::BlockInput
USER32.dll::CloseDesktop
USER32.dll::CreateMenu
USER32.dll::EmptyClipboard
USER32.dll::FindWindowExW
USER32.dll::FindWindowW

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