MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 a83aef025ddef912d97df8bbae2601b592a5e8d7db22f7f604467cc9dda1f4de. 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: 16


Intelligence 16 IOCs YARA 22 File information Comments
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SHA256 hash: a83aef025ddef912d97df8bbae2601b592a5e8d7db22f7f604467cc9dda1f4de
SHA3-384 hash: e0d064b6facb8d371345c9fcb86d952f15c14042693d3431c61bf003e3f04eb22b74ebae70baa9b1e25e3c1d80c6bb27
SHA1 hash: 4359bad86463dc498bda6f2aec56b64b89790692
MD5 hash: 0add33d563f3887bebf4a3fa59bc3ef8
humanhash: blossom-tennessee-virginia-october
File name:WjhF.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:685'056 bytes
First seen:2024-05-18 01:14:32 UTC
Last seen:2024-05-18 02:46:18 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'666 x AgentTesla, 19'479 x Formbook, 12'209 x SnakeKeylogger)
ssdeep 12288:PhsL0pei36RMQV/YGLTz1b3FL0BGs8SKt766wiAACMOcx:Ph7pp36WQV/BTV3FL0BGs8l766n5Ocx
Threatray 3'087 similar samples on MalwareBazaar
TLSH T136E412493BDCDF28C0BF97F474A401A06776A626B5A2E75C7DE260DB09B1B018913F1B
TrID 63.0% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
11.2% (.SCR) Windows screen saver (13097/50/3)
9.0% (.EXE) Win64 Executable (generic) (10523/12/4)
5.6% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
3.8% (.EXE) Win32 Executable (generic) (4504/4/1)
Reporter kafan_shengui
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
2
# of downloads :
322
Origin country :
US US
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
a83aef025ddef912d97df8bbae2601b592a5e8d7db22f7f604467cc9dda1f4de.exe
Verdict:
Malicious activity
Analysis date:
2024-05-18 01:27:22 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/722bdfbd-3412-44f4-9869-13dd5ccc5eb1

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
SecuriteInfo.com.Trojan.Siggen28.47860.17989.16157.UNOFFICIAL
Create hunting rule

Gathering data
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Сreating synchronization primitives
Creating a process with a hidden window
Unauthorized injection to a recently created process
Restart of the analyzed sample
Creating a file
Launching a process
Launching cmd.exe command interpreter
Setting browser functions hooks
Adding an exclusion to Microsoft Defender
Unauthorized injection to a system process
Unauthorized injection to a browser process
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
packed
Link:
https://www.filescan.io/uploads/6648013181ea6b1eef4474dc/reports/0af2bfdf-59ce-4eb9-8cc2-41a9f08150a7/overview
Verdict:
Malicious
Labled as:
Trojan.Generic
Link:
https://www.hybrid-analysis.com/sample/a83aef025ddef912d97df8bbae2601b592a5e8d7db22f7f604467cc9dda1f4de
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/42d2119a-1d83-4fca-9c6c-13534ef20ecf
Result
Threat name:
FormBook
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Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1443611
Signature
.NET source code contains potential unpacker
Adds a directory exclusion to Windows Defender
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Found malware configuration
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)
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: Powershell Base64 Encoded MpPreference Cmdlet
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
Uses netstat to query active network connections and open ports
Yara detected AntiVM3
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1443611 Sample: WjhF.exe Startdate: 18/05/2024 Architecture: WINDOWS Score: 100 34 www.xiangadvanced.site 2->34 36 www.ombak99.lol 2->36 38 6 other IPs or domains 2->38 46 Snort IDS alert for network traffic 2->46 48 Found malware configuration 2->48 50 Malicious sample detected (through community Yara rule) 2->50 52 9 other signatures 2->52 11 WjhF.exe 4 2->11         started        signatures3 process4 signatures5 58 Adds a directory exclusion to Windows Defender 11->58 60 Tries to detect virtualization through RDTSC time measurements 11->60 62 Injects a PE file into a foreign processes 11->62 14 WjhF.exe 11->14         started        17 powershell.exe 23 11->17         started        process6 signatures7 70 Modifies the context of a thread in another process (thread injection) 14->70 72 Maps a DLL or memory area into another process 14->72 74 Sample uses process hollowing technique 14->74 76 Queues an APC in another process (thread injection) 14->76 19 explorer.exe 31 1 14->19 injected 78 Loading BitLocker PowerShell Module 17->78 23 conhost.exe 17->23         started        25 WmiPrvSE.exe 17->25         started        process8 dnsIp9 40 ombak99.lol 192.64.118.107, 49716, 80 NAMECHEAP-NETUS United States 19->40 42 d1qrjwiza3wzm5.cloudfront.net 18.66.122.42, 49712, 80 MIT-GATEWAYSUS United States 19->42 44 2 other IPs or domains 19->44 54 System process connects to network (likely due to code injection or exploit) 19->54 56 Uses netstat to query active network connections and open ports 19->56 27 NETSTAT.EXE 19->27         started        signatures10 process11 signatures12 64 Modifies the context of a thread in another process (thread injection) 27->64 66 Maps a DLL or memory area into another process 27->66 68 Tries to detect virtualization through RDTSC time measurements 27->68 30 cmd.exe 1 27->30         started        process13 process14 32 conhost.exe 30->32         started       
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/a83aef025ddef912d97df8bbae2601b592a5e8d7db22f7f604467cc9dda1f4de
Detection:
formbook
Create hunting rule
Link:
https://mwdb.cert.pl/sample/a83aef025ddef912d97df8bbae2601b592a5e8d7db22f7f604467cc9dda1f4de/
Threat name:
ByteCode-MSIL.Trojan.Taskun
Create hunting rule
Status:
Malicious
First seen:
2024-05-16 15:45:02 UTC
File Type:
PE (.Net Exe)
Extracted files:
7
AV detection:
18 of 23 (78.26%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=va5o6as5334rfwl57c524jqbwwjkl2gx3mrpp5qeiz6mtxnb6tpa._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Similar samples:
0cb284abb63cf61b070bfa0a5250ff536f92907bbf5eec07070b9aeafa4ac2bd
Formbook
19b86526b9c8b33ee230bba95c8a02fc47db4d230933c3ebcb6888e0dd344f77
Formbook
37fd7b8035bd49b8dfad405a793428dda8cbf623de0133818756d05a1191d8b7
Formbook
6ec844914b335f0e27b9f536da5691fcc06e6ecc80d0af8dd7bc3ed8b3ee0a60
Formbook
a83aef025ddef912d97df8bbae2601b592a5e8d7db22f7f604467cc9dda1f4de
Formbook
bcf3670fe7a029d453f1887f16b97b8577235980909aa282d410cd927fb53a7f
Formbook
bf1f882e2a1d0e35207cd7cab867bffe933e134e43ff317acf2db538bd4d7210
Formbook
d0b94b855d2f24add1edf6b3a6ecae24e4366f181a1ccd0bcd3b27e94de95bc0
Formbook
f364037856ba668a59ccec86771c5f35e45d007192c79f63d83fec463f9d1ffe
Formbook
f7decb942c4d2f001d2f810978463780697403597ed4f5102a19c27edd649ce3
Formbook
+ 3'077 additional samples on MalwareBazaar
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook campaign:pz12 execution rat spyware stealer trojan
Link:
https://tria.ge/reports/240518-bl8snada8x/
Behaviour
Modifies registry class
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of UnmapMainImage
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Suspicious use of SetThreadContext
Checks computer location settings
Deletes itself
Command and Scripting Interpreter: PowerShell
Formbook payload
Formbook
Unpacked files
SH256 hash:
0b20fb89c6efad8f81691293666d012b1401a92cf1826cc221552bb13158693f
MD5 hash:
96e228ff2b554adf664f368c8b3b2bc6
SHA1 hash:
5b03d91eb65047fb99296e96b08e252622037596
Detections:
FormBook
Create hunting rule
win_formbook_w0
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win_formbook_auto
Create hunting rule
win_formbook_g0
Create hunting rule
Formbook
Create hunting rule
Link:
https://www.unpac.me/results/9adc7bbe-b4cc-4900-91ed-9c2f64a69640/
Parent samples :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 hash:
f540e8d603962027b3a1f8b86d035281bfbdd3a05a621ead255825bc2082632a
MD5 hash:
d172f59251b97b415b621d302e1be2b7
SHA1 hash:
b1534e603749c901b5ac185f20e281f6be7fa908
Link:
https://www.unpac.me/results/9adc7bbe-b4cc-4900-91ed-9c2f64a69640/
SH256 hash:
35c2700f2c0eeac5e57f262eac1833206ef8ecf58d8c177f9e5fadb3362b9595
MD5 hash:
b52fcb68e20e28a895c4f16e0b8f9e05
SHA1 hash:
2b586fb4d23ce3aaf215c9404aaa45af57904338
Link:
https://www.unpac.me/results/9adc7bbe-b4cc-4900-91ed-9c2f64a69640/
SH256 hash:
27ddc96465ac70b602e730ca4b28018a2875f5aca4215f3d8608b9defc8bf23d
MD5 hash:
1b2614489be216f14010dea5dee50dc5
SHA1 hash:
046c2462662dc3adea1c79121b4d865665850e23
Link:
https://www.unpac.me/results/9adc7bbe-b4cc-4900-91ed-9c2f64a69640/
SH256 hash:
a83aef025ddef912d97df8bbae2601b592a5e8d7db22f7f604467cc9dda1f4de
MD5 hash:
0add33d563f3887bebf4a3fa59bc3ef8
SHA1 hash:
4359bad86463dc498bda6f2aec56b64b89790692
Link:
https://www.unpac.me/results/9adc7bbe-b4cc-4900-91ed-9c2f64a69640/
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/a83aef025ddef912d97df8bbae2601b592a5e8d7db22f7f604467cc9dda1f4de

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:AgentTesla_DIFF_Common_Strings_01
Create hunting rule
Author:schmidtsz
Description:Identify partial Agent Tesla strings
Rule name:DebuggerCheck__GlobalFlags
Create hunting rule
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
Create hunting rule
Author:phoul (@phoul)
Description:Look for MD5 constants
Rule name:meth_get_eip
Create hunting rule
Author:Willi Ballenthin
Rule name:NET
Create hunting rule
Author:malware-lu
Rule name:pe_imphash
Create hunting rule
Rule name:pe_no_import_table
Create hunting rule
Description:Detect pe file that no import table
Rule name:RIPEMD160_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for RIPEMD-160 constants
Rule name:SEH__vectored
Create hunting rule
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:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash

File information

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

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

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