MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 3fb935f3b274dddf25a926967ceb573ad0f990bff966583157849545c60c42e4. 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: 3fb935f3b274dddf25a926967ceb573ad0f990bff966583157849545c60c42e4
SHA3-384 hash: 4cf711576c8734290f4f2253e6d123982ccf47167a06f917cf90216cf3628434e2c9e0126f4cbe85fdbffbcbbca218b0
SHA1 hash: 930508090c6ec226838189c1d6ca32035c2ac0ed
MD5 hash: 7206084219e20fe7575aec63a3422a5c
humanhash: mars-single-virginia-kansas
File name:BM-FM_NR.24040718PDF.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:646'803 bytes
First seen:2024-04-24 10:16:57 UTC
Last seen:2024-04-24 13:18:30 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash b78ecf47c0a3e24a6f4af114e2d1f5de (295 x GuLoader, 23 x Formbook, 21 x RemcosRAT)
ssdeep 6144:5z27B8gj9StARXpmTvIcw3/hxXYCckBWxTYDMnz5aO3xIiwETMAKo/x4Fl+c0XMF:hIXSQpmkBWxjniiwETmFmY
TLSH T1A6D44BA5A364CC7FF5D779B6D89AD03028ABBC4851E5510E129DB719A0B732200FFA1F
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) (4504/4/1)
File icon (PE):PE icon
dhash icon f0d4ccc4c4c4e4f4 (1 x Formbook)
Reporter threatcat_ch
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
5
# of downloads :
343
Origin country :
CH CH
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
3fb935f3b274dddf25a926967ceb573ad0f990bff966583157849545c60c42e4.exe
Verdict:
Suspicious activity
Analysis date:
2024-04-24 10:19:47 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/2ae5e3ec-20bb-42da-b91f-72da601b7fca

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Result
Verdict:
Clean
Maliciousness:

Behaviour
Searching for the window
Creating a window
Creating a file in the %AppData% subdirectories
Creating a file in the %temp% subdirectories
Delayed reading of the file
Verdict:
Malicious
Labled as:
Malware
Link:
https://www.hybrid-analysis.com/sample/3fb935f3b274dddf25a926967ceb573ad0f990bff966583157849545c60c42e4
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.
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/393ff051-e1cc-435e-9e05-6d8a2050f44c
Result
Threat name:
GuLoader, FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad.spyw
Score:
96 / 100
Link:
https://www.joesandbox.com/analysis/1430949
Signature
Found direct / indirect Syscall (likely to bypass EDR)
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 submitted file
Queues an APC in another process (thread injection)
Tries to harvest and steal browser information (history, passwords, etc)
Tries to steal Mail credentials (via file / registry access)
Yara detected FormBook
Yara detected GuLoader
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1430949 Sample: BM-FM_NR.24040718PDF.exe Startdate: 24/04/2024 Architecture: WINDOWS Score: 96 31 www.weave.game 2->31 33 www.ogunlewefamily.org.ng 2->33 35 24 other IPs or domains 2->35 47 Malicious sample detected (through community Yara rule) 2->47 49 Multi AV Scanner detection for submitted file 2->49 51 Yara detected FormBook 2->51 53 Yara detected GuLoader 2->53 10 BM-FM_NR.24040718PDF.exe 3 35 2->10         started        signatures3 process4 file5 29 C:\Users\user\AppData\Local\...\System.dll, PE32 10->29 dropped 13 BM-FM_NR.24040718PDF.exe 6 10->13         started        process6 dnsIp7 43 absorbante-calitate.ro 37.251.143.215, 443, 50244 WEBCLASSITRO Romania 13->43 65 Maps a DLL or memory area into another process 13->65 17 asoFfnDVnWYESbbZcbazpTYkAQVO.exe 13->17 injected signatures8 process9 signatures10 45 Found direct / indirect Syscall (likely to bypass EDR) 17->45 20 write.exe 13 17->20         started        process11 signatures12 55 Tries to steal Mail credentials (via file / registry access) 20->55 57 Tries to harvest and steal browser information (history, passwords, etc) 20->57 59 Modifies the context of a thread in another process (thread injection) 20->59 61 2 other signatures 20->61 23 asoFfnDVnWYESbbZcbazpTYkAQVO.exe 20->23 injected 27 firefox.exe 20->27         started        process13 dnsIp14 37 www.techfun.info 203.161.49.193, 50266, 50267, 50268 VNPT-AS-VNVNPTCorpVN Malaysia 23->37 39 www.lm2ue.us 91.195.240.123, 50282, 50283, 50284 SEDO-ASDE Germany 23->39 41 10 other IPs or domains 23->41 63 Found direct / indirect Syscall (likely to bypass EDR) 23->63 signatures15
Score:
93%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/3fb935f3b274dddf25a926967ceb573ad0f990bff966583157849545c60c42e4
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/3fb935f3b274dddf25a926967ceb573ad0f990bff966583157849545c60c42e4/
Threat name:
Win32.Trojan.Guloader
Create hunting rule
Status:
Malicious
First seen:
2024-04-24 10:17:05 UTC
File Type:
PE (Exe)
Extracted files:
6
AV detection:
18 of 24 (75.00%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=h64tl45soto56jnje2lhz22xhliptef77ftfqmkxqskulrqmilsa._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Result
Malware family:
n/a
Score:
  7/10
Tags:
n/a
Link:
https://tria.ge/reports/240424-mbcs1sgg3t/
Behaviour
Modifies Internet Explorer settings
Modifies system certificate store
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of UnmapMainImage
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Drops file in Windows directory
Suspicious use of NtCreateThreadExHideFromDebugger
Suspicious use of NtSetInformationThreadHideFromDebugger
Suspicious use of SetThreadContext
Loads dropped DLL
Unpacked files
SH256 hash:
4c86b238e64ecfaabe322a70fd78db229a663ccc209920f3385596a6e3205f78
MD5 hash:
375e8a08471dc6f85f3828488b1147b3
SHA1 hash:
1941484ac710fc301a7d31d6f1345e32a21546af
Link:
https://www.unpac.me/results/fc09a904-3b75-4070-b0f7-87126cc1e4ee/
SH256 hash:
3fb935f3b274dddf25a926967ceb573ad0f990bff966583157849545c60c42e4
MD5 hash:
7206084219e20fe7575aec63a3422a5c
SHA1 hash:
930508090c6ec226838189c1d6ca32035c2ac0ed
Link:
https://www.unpac.me/results/fc09a904-3b75-4070-b0f7-87126cc1e4ee/
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/3fb935f3b274/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Formbook
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/3fb935f3b274dddf25a926967ceb573ad0f990bff966583157849545c60c42e4

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:Detect_SliverFox_String
Create hunting rule
Author:huoji
Description:Detect files is `SliverFox` malware
Rule name:Ins_NSIS_Buer_Nov_2020_1
Create hunting rule
Author:Arkbird_SOLG
Description:Detect NSIS installer used for Buer loader
Rule name:NSIS_April_2024
Create hunting rule
Author:NDA0N
Description:Detects NSIS installers

File information

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

Malspam

Formbook

Executable exe 3fb935f3b274dddf25a926967ceb573ad0f990bff966583157849545c60c42e4

(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
Reviews
IDCapabilitiesEvidence
AUTH_APIManipulates User AuthorizationADVAPI32.dll::SetFileSecurityA
COM_BASE_APICan Download & Execute componentsole32.dll::CoCreateInstance
SECURITY_BASE_APIUses Security Base APIADVAPI32.dll::AdjustTokenPrivileges
SHELL_APIManipulates System ShellSHELL32.dll::ShellExecuteA
SHELL32.dll::SHFileOperationA
SHELL32.dll::SHGetFileInfoA
WIN32_PROCESS_APICan Create Process and ThreadsKERNEL32.dll::CreateProcessA
ADVAPI32.dll::OpenProcessToken
KERNEL32.dll::CloseHandle
KERNEL32.dll::CreateThread
WIN_BASE_APIUses Win Base APIKERNEL32.dll::LoadLibraryExA
KERNEL32.dll::GetDiskFreeSpaceA
KERNEL32.dll::GetCommandLineA
WIN_BASE_IO_APICan Create FilesKERNEL32.dll::CopyFileA
KERNEL32.dll::CreateDirectoryA
KERNEL32.dll::CreateFileA
KERNEL32.dll::DeleteFileA
KERNEL32.dll::MoveFileExA
KERNEL32.dll::MoveFileA
WIN_BASE_USER_APIRetrieves Account InformationADVAPI32.dll::LookupPrivilegeValueA
WIN_REG_APICan Manipulate Windows RegistryADVAPI32.dll::RegCreateKeyExA
ADVAPI32.dll::RegDeleteKeyA
ADVAPI32.dll::RegOpenKeyExA
ADVAPI32.dll::RegQueryValueExA
ADVAPI32.dll::RegSetValueExA
WIN_USER_APIPerforms GUI ActionsUSER32.dll::AppendMenuA
USER32.dll::EmptyClipboard
USER32.dll::FindWindowExA
USER32.dll::OpenClipboard
USER32.dll::PeekMessageA
USER32.dll::CreateWindowExA

Comments