MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 837b5c608ebc19191678d6cca32c6558e6ad3624015858ecc8c895766298a5b1. 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: 20


Intelligence 20 IOCs YARA 15 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 837b5c608ebc19191678d6cca32c6558e6ad3624015858ecc8c895766298a5b1
SHA3-384 hash: e8a20bfb71ce4965045cfe6ec1cdc6c0715dc246ba79c6ec00c406494f19fce271c4fd27b7c90d86e3c2a63edb3f6912
SHA1 hash: f05c2141b055999f8daddec42e0ecbac103cdc42
MD5 hash: ce6322b322b0a9f3c23a65a0d6c39fad
humanhash: winner-single-purple-august
File name:SecuriteInfo.com.Win32.CrypterX-gen.13376.11936
Download: download sample
Signature Formbook
Create hunting rule
File size:907'264 bytes
First seen:2025-02-27 02:25:17 UTC
Last seen:2025-02-27 13:56:40 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'652 x AgentTesla, 19'463 x Formbook, 12'204 x SnakeKeylogger)
ssdeep 24576:oeXz4Xhb9wm5lfSRsIqOgBe2yO1JLqu+iCd:oeDMLzVSRLuhyOENi2
Threatray 2'229 similar samples on MalwareBazaar
TLSH T12715E00CBF924D96CA881B77C413211182FAC467E6ABF39A41CD5DF51F62F59C88F862
TrID 71.1% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
10.2% (.EXE) Win64 Executable (generic) (10522/11/4)
6.3% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
4.3% (.EXE) Win32 Executable (generic) (4504/4/1)
2.0% (.ICL) Windows Icons Library (generic) (2059/9)
Magika pebin
dhash icon b0b268e8ccd486a2 (11 x Formbook, 5 x SnakeKeylogger, 3 x MassLogger)
Reporter SecuriteInfoCom
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
5
# of downloads :
694
Origin country :
FR FR
Vendor Threat Intelligence
Malware family:
formbook
Create hunting rule
ID:
1
File name:
SecuriteInfo.com.Win32.CrypterX-gen.13376.11936
Verdict:
Malicious activity
Analysis date:
2025-02-27 02:27:59 UTC
Tags:
formbook stealer xloader
Link:
https://app.any.run/tasks/a95717f6-02a2-469e-9407-5454e70d0100

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
SecuriteInfo.com.Win32.CrypterX-gen.13376.11936.UNOFFICIAL
Create hunting rule

Verdict:
Malicious
Score:
96.5%
Link:
https://cyber-fortress.com/docs/result/index.php?id=67bfcdeaa0fd713c335d2075
Tags:
virus micro msil
Result
Verdict:
Malware
Maliciousness:

Behaviour
Сreating synchronization primitives
Connection attempt
Searching for synchronization primitives
Creating a window
Launching a service
Creating a process with a hidden window
Creating a file in the %AppData% directory
Enabling the 'hidden' option for recently created files
Adding an access-denied ACE
Creating a file in the %temp% directory
Launching a process
Creating a file
Launching cmd.exe command interpreter
Forced shutdown of a system process
Adding an exclusion to Microsoft Defender
Enabling autorun by creating a file
Unauthorized injection to a system process
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
obfuscated obfuscated obfuscated packed packed packer_detected vbnet
Link:
https://www.filescan.io/uploads/67bfcd14f8726576332b394c/reports/6e351649-1969-4a31-aacc-d31da3c296e6/overview
Verdict:
Malicious
Labled as:
HackTool[Obfuscator]/MSIL.DeepSea
Link:
https://www.hybrid-analysis.com/sample/837b5c608ebc19191678d6cca32c6558e6ad3624015858ecc8c895766298a5b1
Result
Verdict:
SUSPICIOUS
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/59c5f195-96b1-4fa7-9d92-1e8edfb46e24
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1625335
Signature
.NET source code contains potential unpacker
.NET source code contains very large array initializations
Adds a directory exclusion to Windows Defender
Allocates memory in foreign processes
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Found direct / indirect Syscall (likely to bypass EDR)
Found malware configuration
Injects a PE file into a foreign processes
Joe Sandbox ML detected suspicious sample
Loading BitLocker PowerShell Module
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 dropped file
Multi AV Scanner detection for submitted file
Performs DNS queries to domains with low reputation
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
Sigma detected: Powershell Base64 Encoded MpPreference Cmdlet
Sigma detected: Rundll32 Execution Without CommandLine Parameters
Sigma detected: Scheduled temp file as task from temp location
Switches to a custom stack to bypass stack traces
Tries to detect virtualization through RDTSC time measurements
Uses schtasks.exe or at.exe to add and modify task schedules
Writes to foreign memory regions
Yara detected AntiVM3
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1625335 Sample: SecuriteInfo.com.Win32.Cryp... Startdate: 27/02/2025 Architecture: WINDOWS Score: 100 61 www.ahooodi.xyz 2->61 63 www.uetedit.net 2->63 65 9 other IPs or domains 2->65 79 Found malware configuration 2->79 81 Malicious sample detected (through community Yara rule) 2->81 83 Antivirus detection for URL or domain 2->83 87 10 other signatures 2->87 11 SecuriteInfo.com.Win32.CrypterX-gen.13376.11936.exe 11 7 2->11         started        15 hgAOERBGOV.exe 2->15         started        signatures3 85 Performs DNS queries to domains with low reputation 61->85 process4 file5 53 C:\Users\user\AppData\...\hgAOERBGOV.exe, PE32 11->53 dropped 55 C:\Users\...\hgAOERBGOV.exe:Zone.Identifier, ASCII 11->55 dropped 57 C:\Users\user\AppData\Local\...\tmp1995.tmp, XML 11->57 dropped 59 SecuriteInfo.com.W...13376.11936.exe.log, ASCII 11->59 dropped 97 Uses schtasks.exe or at.exe to add and modify task schedules 11->97 99 Writes to foreign memory regions 11->99 101 Allocates memory in foreign processes 11->101 103 Adds a directory exclusion to Windows Defender 11->103 17 RegSvcs.exe 11->17         started        20 powershell.exe 21 11->20         started        22 powershell.exe 23 11->22         started        24 schtasks.exe 1 11->24         started        105 Multi AV Scanner detection for dropped file 15->105 107 Injects a PE file into a foreign processes 15->107 26 RegSvcs.exe 15->26         started        28 schtasks.exe 15->28         started        signatures6 process7 signatures8 67 Modifies the context of a thread in another process (thread injection) 17->67 69 Maps a DLL or memory area into another process 17->69 71 Sample uses process hollowing technique 17->71 77 2 other signatures 17->77 30 explorer.exe 17->30 injected 73 Loading BitLocker PowerShell Module 20->73 32 conhost.exe 20->32         started        34 WmiPrvSE.exe 20->34         started        36 conhost.exe 22->36         started        38 conhost.exe 24->38         started        75 Found direct / indirect Syscall (likely to bypass EDR) 26->75 40 conhost.exe 28->40         started        process9 process10 42 cmd.exe 30->42         started        45 rundll32.exe 30->45         started        47 autoconv.exe 30->47         started        signatures11 89 Modifies the context of a thread in another process (thread injection) 42->89 91 Maps a DLL or memory area into another process 42->91 93 Tries to detect virtualization through RDTSC time measurements 42->93 95 Switches to a custom stack to bypass stack traces 42->95 49 cmd.exe 42->49         started        process12 process13 51 conhost.exe 49->51         started       
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/837b5c608ebc19191678d6cca32c6558e6ad3624015858ecc8c895766298a5b1
Detection:
formbook
Create hunting rule
Link:
https://mwdb.cert.pl/sample/837b5c608ebc19191678d6cca32c6558e6ad3624015858ecc8c895766298a5b1/
Threat name:
Win32.Backdoor.FormBook
Create hunting rule
Status:
Malicious
First seen:
2025-02-27 00:48:41 UTC
File Type:
PE (.Net Exe)
Extracted files:
2
AV detection:
16 of 24 (66.67%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=qn5vyyeoxqmrsfty23gkgldfldtk2nreafmfr3gizckxmyuyuwyq._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
unknown_loader_037
Create hunting rule
Similar samples:
36e9bfc5337aa8a4dd2c8c24087a3cdc3f589df01ec12c0d81a28eb62b67b9e4
Formbook
596681238e749d9109fd00bbc95f364f4cfc5977cf1d2253bd8ee268d6dbbf2f
Formbook
7dbfe3e815092dfd471861a962bbb464ec76438144f4cb5dd031b02eda2f8ea9
Formbook
a2c40c36ad82e27b4db35cb35800e6fcd428983434b9bb11b5005e92b353baad
Formbook
b51868a125a577733f6208c4f11c8887aca278b339abe7f62fe2a4808a8399aa
Formbook
error
Formbook
+ 2'219 additional samples on MalwareBazaar
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook campaign:my18 discovery execution rat spyware stealer trojan
Link:
https://tria.ge/reports/250227-cwh6essls5/
Behaviour
Checks processor information in registry
Scheduled Task/Job: Scheduled Task
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of UnmapMainImage
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
System Location Discovery: System Language Discovery
Suspicious use of SetThreadContext
Checks computer location settings
Command and Scripting Interpreter: PowerShell
Formbook payload
Formbook
Formbook family
Verdict:
Malicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/31fdada3-eefa-4c85-820e-215a7e396e2c
Unpacked files
SH256 hash:
837b5c608ebc19191678d6cca32c6558e6ad3624015858ecc8c895766298a5b1
MD5 hash:
ce6322b322b0a9f3c23a65a0d6c39fad
SHA1 hash:
f05c2141b055999f8daddec42e0ecbac103cdc42
Link:
https://www.unpac.me/results/05261458-9082-4516-98ec-177f705f5f0f/
SH256 hash:
671bd9908b041c221c65cde39977e7f3993a760e445d20567cb0cc20092c494b
MD5 hash:
4f239d41510e4dc6a29fa3c636d626ba
SHA1 hash:
723c89cf584a3d2db472618a15a04763652afb59
Detections:
SUSP_OBF_NET_ConfuserEx_Name_Pattern_Jan24
Create hunting rule
SUSP_OBF_NET_Reactor_Indicators_Jan24
Create hunting rule
Link:
https://www.unpac.me/results/05261458-9082-4516-98ec-177f705f5f0f/
SH256 hash:
cede06ea613cc17292a475421cbc218f3f24649a73fc890d80d529d2345a9576
MD5 hash:
4da9bd84a26d5cb56d48d69a7917b80e
SHA1 hash:
75e388d75f13c21f1cc648415c34cc2470a1942b
Link:
https://www.unpac.me/results/05261458-9082-4516-98ec-177f705f5f0f/
SH256 hash:
014af1eeb386d2d55905a3a9e582d070fb7fb04fd6167dfdcf5fe40ef4628035
MD5 hash:
fab7758d7c5b6317d1559d5c06aba0e0
SHA1 hash:
039e53c637bc55803e95e5cb8782120b61f93f0c
Detections:
win_formbook_w0
Create hunting rule
win_formbook_g0
Create hunting rule
win_formbook_auto
Create hunting rule
FormBook
Create hunting rule
Windows_Trojan_Formbook
Create hunting rule
Formbook
Create hunting rule
Link:
https://www.unpac.me/results/05261458-9082-4516-98ec-177f705f5f0f/
Parent samples :
b6e1a7be0cd6d15ce7ba0bc79da9b8f280ab0060bc7754ba3df84555fc28b0db
0297c69a6525dcc36009ebcf3df69478f22e99d788dd81b1a26728c7acb663e9
04b3e24898ad118dfee0013ae96979d83d0dc99c3497fd123b09d3cbf9180cbb
1a0c0bf6760f3967f8c77ba920c041e3a653821c70759e2913652219ad557520
f083c69e9070bb7d48eac9f06da6503a9f47829536bfa94065be7385f12ce07c
d853825ca0a839c07cb0b00a5d2a418058fa2ba649cce517ed569a566f205ca2
9aa38b8cdbf5c14b63df00b2d842417396660e8e0767b3cc381fb3d4ce171c3c
cb122b2022fcde8c2f1704ac186a0add17028456d867be7fed22e4244bca4a64
36e9bfc5337aa8a4dd2c8c24087a3cdc3f589df01ec12c0d81a28eb62b67b9e4
b51868a125a577733f6208c4f11c8887aca278b339abe7f62fe2a4808a8399aa
837b5c608ebc19191678d6cca32c6558e6ad3624015858ecc8c895766298a5b1
947ec6962a7ed9346d1c6b182a8c4fb3345845efe21d7e243314cfe7809f818b
b96b39428f0eeea593f2b68faa42e478b315b4e80f937662f5520e98a1ba0f0c
2305e7ed7abed240fc572c817b6392c81709f9013ebde8ab7fc745c0cb68825c
87723c1d0c921c43c3e6c8128624e2e473782ee165a964ab675286da78dad694
2dbc649f56dbbc3bc0b958929fd993b6a0dc60513c9cf95c9e577bc71534031c
54902efb04a961959a6ac354c9c54fa1cd59172ae5f713c3a0bfa30448217af3
70f93b60537a4520135818ff850c19575d848f0024c1bf787fe25cbafcf4524d
cd7cd7f1cca233eab23d5fc8b50d0025dda42cefe89edecf38a6324eb3dd334b
7c255e1da5023e24d8932926c2bef9335a210eae149d1e5236c92c9b5c89e9bc
Malware family:
FormBook
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/837b5c608ebc/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/837b5c608ebc19191678d6cca32c6558e6ad3624015858ecc8c895766298a5b1

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
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:golang_bin_JCorn_CSC846
Create hunting rule
Author:Justin Cornwell
Description:CSC-846 Golang detection ruleset
Rule name:MD5_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for MD5 constants
Rule name:NET
Create hunting rule
Author:malware-lu
Rule name:NETexecutableMicrosoft
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
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)

File information

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

Malspam

Formbook

zip 61f9f03ffaf85883208ae89e3fb564d8916e31c7f1742f8f4a12a77d77608f76

Formbook

Executable exe 837b5c608ebc19191678d6cca32c6558e6ad3624015858ecc8c895766298a5b1

(this sample)

  
Dropped by
SHA256 61f9f03ffaf85883208ae89e3fb564d8916e31c7f1742f8f4a12a77d77608f76
  
Dropped by
MD5 3111d673e68876c0db256f3adc092af4

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