MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 637ec5277677d323a35dce85ac7fb3440ec70ca14fbaa051a2df46652a4711d4. 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: 18


Intelligence 18 IOCs YARA 15 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 637ec5277677d323a35dce85ac7fb3440ec70ca14fbaa051a2df46652a4711d4
SHA3-384 hash: d2f0b2a746f9e1b3b218b07c1720951332db59ecbd42dcce3d465fe087cb7465be8e451fd9a5888808576543a03298c8
SHA1 hash: 5e889f32779fc120704288450fae1bd1dfbd0926
MD5 hash: 670ec4d161f3b49adb0b58058bed084b
humanhash: autumn-monkey-hydrogen-winner
File name:payment confirmation.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:696'320 bytes
First seen:2025-02-03 08:14:49 UTC
Last seen:2025-03-07 14:05:07 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'649 x AgentTesla, 19'461 x Formbook, 12'202 x SnakeKeylogger)
ssdeep 12288:iYnwXaswecl9h8UtmmU2kNntDA7ITIMN8rQnNfkGSdhXZXi6yiah:GweRWmR2IDA7Jo8rQnizdj
Threatray 2'077 similar samples on MalwareBazaar
TLSH T104E4E1D43B7AA706DDA55A30D935EDB452BD2DA8B000F9E31EDD3B4B78AD2016D08F06
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
File icon (PE):PE icon
dhash icon e0e698a08088a888 (20 x Formbook, 6 x AgentTesla, 3 x SnakeKeylogger)
Reporter cocaman
Tags:exe FormBook payment

Intelligence

File Origin
# of uploads :
3
# of downloads :
462
Origin country :
CH CH
Vendor Threat Intelligence
Malware family:
formbook
Create hunting rule
ID:
1
File name:
49db0f5a8084b3bd660a46be3b33f497772c57cbaad095df927b7d07b73c8ffe
Verdict:
Malicious activity
Analysis date:
2025-02-03 07:04:30 UTC
Tags:
arch-exec formbook xloader
Link:
https://app.any.run/tasks/876ba883-5237-4d69-a56d-4da75f051806

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
SecuriteInfo.com.Win32.MalwareX-gen.1697.26570.UNOFFICIAL
Create hunting rule

Verdict:
Malicious
Score:
99.1%
Link:
https://cyber-fortress.com/docs/result/index.php?id=67a06a7e2dcee78dd8192426
Tags:
virus micro msil
Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Creating a window
Сreating synchronization primitives
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:
masquerade obfuscated packed packed packer_detected vbnet
Link:
https://www.filescan.io/uploads/67a07b19d5f62a1c6292fa5e/reports/571f18b1-091f-48f3-be5d-cc27631f1e7d/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
Link:
https://www.hybrid-analysis.com/sample/637ec5277677d323a35dce85ac7fb3440ec70ca14fbaa051a2df46652a4711d4
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.
Verdict:
Suspicious
Link:
https://analyze.intezer.com/analyses/682eb90f-ec5d-45cb-95aa-be02cb22e305
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1605395
Signature
.NET source code contains potential unpacker
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
Initial sample is a PE file and has a suspicious name
Injects a PE file into a foreign processes
Joe Sandbox ML detected suspicious sample
Loading BitLocker PowerShell Module
Machine Learning detection for dropped file
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 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: 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
Tries to resolve many domain names, but no domain seems valid
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: 1605395 Sample: payment confirmation.exe Startdate: 03/02/2025 Architecture: WINDOWS Score: 100 65 www.oincatch.xyz 2->65 67 www.xecadminadvo.vip 2->67 69 9 other IPs or domains 2->69 85 Found malware configuration 2->85 87 Malicious sample detected (through community Yara rule) 2->87 89 Antivirus detection for URL or domain 2->89 93 13 other signatures 2->93 11 payment confirmation.exe 7 2->11         started        15 ZeqyQbn.exe 5 2->15         started        signatures3 91 Performs DNS queries to domains with low reputation 65->91 process4 file5 57 C:\Users\user\AppData\Roaming\ZeqyQbn.exe, PE32 11->57 dropped 59 C:\Users\user\...\ZeqyQbn.exe:Zone.Identifier, ASCII 11->59 dropped 61 C:\Users\user\AppData\Local\...\tmpE8DF.tmp, XML 11->61 dropped 63 C:\Users\...\payment confirmation.exe.log, ASCII 11->63 dropped 103 Adds a directory exclusion to Windows Defender 11->103 17 RegSvcs.exe 11->17         started        20 powershell.exe 22 11->20         started        22 powershell.exe 23 11->22         started        28 2 other processes 11->28 105 Multi AV Scanner detection for dropped file 15->105 107 Machine Learning detection for dropped file 15->107 109 Writes to foreign memory regions 15->109 111 2 other signatures 15->111 24 RegSvcs.exe 15->24         started        26 schtasks.exe 15->26         started        signatures6 process7 signatures8 71 Modifies the context of a thread in another process (thread injection) 17->71 73 Maps a DLL or memory area into another process 17->73 75 Sample uses process hollowing technique 17->75 77 Queues an APC in another process (thread injection) 17->77 30 explorer.exe 51 1 17->30 injected 79 Loading BitLocker PowerShell Module 20->79 32 WmiPrvSE.exe 20->32         started        34 conhost.exe 20->34         started        36 conhost.exe 22->36         started        81 Found direct / indirect Syscall (likely to bypass EDR) 24->81 38 conhost.exe 26->38         started        83 Tries to detect virtualization through RDTSC time measurements 28->83 40 conhost.exe 28->40         started        process9 process10 42 control.exe 30->42         started        45 chkdsk.exe 30->45         started        47 autoconv.exe 30->47         started        51 2 other processes 30->51 49 conhost.exe 40->49         started        signatures11 95 Modifies the context of a thread in another process (thread injection) 42->95 97 Maps a DLL or memory area into another process 42->97 99 Tries to detect virtualization through RDTSC time measurements 42->99 101 Switches to a custom stack to bypass stack traces 42->101 53 cmd.exe 42->53         started        process12 process13 55 conhost.exe 53->55         started       
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/637ec5277677d323a35dce85ac7fb3440ec70ca14fbaa051a2df46652a4711d4
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/637ec5277677d323a35dce85ac7fb3440ec70ca14fbaa051a2df46652a4711d4/
Threat name:
Win32.Backdoor.NanoCore
Create hunting rule
Status:
Malicious
First seen:
2025-02-03 01:55:44 UTC
File Type:
PE (.Net Exe)
Extracted files:
6
AV detection:
19 of 24 (79.17%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=mn7mkj3wo7jshi25z2c2y75tiqhmodfbj65kaunc35dgkkshchka._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
unknown_loader_037
Create hunting rule
Similar samples:
19c20b84bd28cc534ea649747488dff45cb53539aaedc936ee2854f93cd6e368
Formbook
28a65019d2736dd82fdb229c9e6f5ff053c25e095d118ae03359238f44ba22d7
Formbook
60ccea072df0c91b1b0f2cc18a88eff5e373c68f4d13c7d93e66fb17d211ec9e
Formbook
6f706398207b1fd3a00de5f859dc840cf8e100175fdabe260ebb96db5980f03c
Formbook
94fbf90615b1baf84da26854c9c7b72115eaa12eb8392d898c7689f433980120
Formbook
error
Formbook
f42de693aaae005ec4dcf3514621f8573b422f3a3ad1bb1af370acc7c5cba233
Formbook
+ 2'067 additional samples on MalwareBazaar
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook campaign:a01d discovery execution rat spyware stealer trojan
Link:
https://tria.ge/reports/250203-j5nwlaxngn/
Behaviour
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/01173357-05d7-4507-8d43-a36d97cfaa42
Unpacked files
SH256 hash:
637ec5277677d323a35dce85ac7fb3440ec70ca14fbaa051a2df46652a4711d4
MD5 hash:
670ec4d161f3b49adb0b58058bed084b
SHA1 hash:
5e889f32779fc120704288450fae1bd1dfbd0926
Link:
https://www.unpac.me/results/64332e4b-8929-401b-be67-04c933caa8c5/
SH256 hash:
ad10b43fa5c82305e7295debf7452b605ea57c26f924327163b6edd51175e9af
MD5 hash:
e2f79d0608f198b136850e2c9d86c5bf
SHA1 hash:
2a80e274aaf5533738a89e8aebbfc7eff284447a
Link:
https://www.unpac.me/results/64332e4b-8929-401b-be67-04c933caa8c5/
SH256 hash:
cde178afb17e504bc60f5970f1ca5f1c9f941c16edd1acdaa997fef23399a0bd
MD5 hash:
27921cecfbc074cfa09a1b85538541ea
SHA1 hash:
028e3bd7a52d43a4512925fc45ae2f8ccdc28d4f
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/64332e4b-8929-401b-be67-04c933caa8c5/
SH256 hash:
1604fc1cab53dbbda0acb66bcd480a6ca2163d30b2c939674a3f8fcd90516e8b
MD5 hash:
6ee3a800435726439a25bed55df1528e
SHA1 hash:
0370e0a34586b499770f637d8fb50ec36208636e
Link:
https://www.unpac.me/results/64332e4b-8929-401b-be67-04c933caa8c5/
SH256 hash:
13e4cd19503453cd78e71f728c9389b2c99e091b215e8ddbec0d81b2f6876f72
MD5 hash:
6a24b2b9224492367a531a14e4c882de
SHA1 hash:
0a55e7a38280f56ad0acdc769e7b795ab22b268a
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/64332e4b-8929-401b-be67-04c933caa8c5/
Parent samples :
44e897b05ea6fc3eff3b2db584a2817cab6ca6e81193396abd21d83ce72fffa5
a3af3dcfd89b655982b6e044b681b140dcefbe0606d69b0b7839b8cda28ccc91
0198cc6636a1c05da00eb7457f498c6e1743fe0a9e3d50fc106621f862bf04dd
7a4b80b6d3ea4ca73224197f7d85d763dd953826978cdc30c6e75fb298cfb5ab
8f41896e69d1f83408cf68e4d6fc56849a6ee6b86145e7cc68d6caed660ac582
94fbf90615b1baf84da26854c9c7b72115eaa12eb8392d898c7689f433980120
19c20b84bd28cc534ea649747488dff45cb53539aaedc936ee2854f93cd6e368
637ec5277677d323a35dce85ac7fb3440ec70ca14fbaa051a2df46652a4711d4
bb1aec54bef16432b3a9e9a35cda7dfabf6e20218384adcc05d685f5fb064a4f
b2fe57ff7504883c1a5050ccf0a6cfe45087a43bea4ce92aec075be6f1852a29
30af910477a154c4b07fa1cbb928f78bc7d714329f725b2a1f2cf7f3139ce351
a7fc129cd3069c3c862c28990c131e3dae5fff42c5ab8cb034e8e8ea12bec94e
682ea9386cf6916b93cd4d71b6e9a56766178c8479e9a5121ca42672d4680754
Malware family:
FormBook
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/637ec5277677/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/637ec5277677d323a35dce85ac7fb3440ec70ca14fbaa051a2df46652a4711d4

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 49db0f5a8084b3bd660a46be3b33f497772c57cbaad095df927b7d07b73c8ffe

Formbook

Executable exe 637ec5277677d323a35dce85ac7fb3440ec70ca14fbaa051a2df46652a4711d4

(this sample)

  
Delivery method
Other
  
Dropped by
SHA256 49db0f5a8084b3bd660a46be3b33f497772c57cbaad095df927b7d07b73c8ffe
  
Dropped by
MD5 507068aa07571b73ac4bad854d8774c3

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

Comments