MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 a3af3dcfd89b655982b6e044b681b140dcefbe0606d69b0b7839b8cda28ccc91. 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 17 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: a3af3dcfd89b655982b6e044b681b140dcefbe0606d69b0b7839b8cda28ccc91
SHA3-384 hash: 86e9ecf2fb6713fd1a0c8ce8daf22d7180131505ef2a1c6bf89f307cf3ff8a21330f0d6705a2230eed73a335c1fdc789
SHA1 hash: b0de85855b3462fe0b37c79831b391eeb044e437
MD5 hash: 1b507df9a13477b647da450a1b79b2e7
humanhash: maine-green-snake-five
File name:New purchase order.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:665'600 bytes
First seen:2025-01-14 10:41:18 UTC
Last seen:2025-01-14 14:51:21 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'744 x AgentTesla, 19'614 x Formbook, 12'242 x SnakeKeylogger)
ssdeep 12288:kYRxA4Y5lyA/BxSPC3NMl2v/wXb5DDH6dcW6f8HtdJqT6B2zJxWVqHU:bRB2XM5UN60STUAJE
TLSH T1F5E40255261AD803C4921B700872D3F946799D99AA12C317CFEE3FFFBD367562A403A2
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
Reporter cocaman
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
2
# of downloads :
872
Origin country :
CH CH
Vendor Threat Intelligence
Malware family:
formbook
Create hunting rule
ID:
1
File name:
Newpurchaseorder.exe
Verdict:
Malicious activity
Analysis date:
2025-01-14 10:45:32 UTC
Tags:
formbook netreactor xloader
Link:
https://app.any.run/tasks/a3df66b3-e7c4-4233-bacc-f0c7cf2779f8

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Verdict:
Malicious
Score:
96.5%
Link:
https://cyber-fortress.com/docs/result/index.php?id=67863f7baa9c8e7858deab02
Tags:
micro shell msil
Result
Verdict:
Malware
Maliciousness:

Behaviour
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
Setting browser functions hooks
Forced shutdown of a system process
Adding an exclusion to Microsoft Defender
Enabling autorun by creating a file
Unauthorized injection to a system process
Unauthorized injection to a browser process
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
masquerade obfuscated packed packed packer_detected
Link:
https://www.filescan.io/uploads/67863f803c232c0ddc8eda89/reports/960860a3-6c4b-460a-b4d2-c1770dce544a/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
Link:
https://www.hybrid-analysis.com/sample/a3af3dcfd89b655982b6e044b681b140dcefbe0606d69b0b7839b8cda28ccc91
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/d5c7ce0b-f435-4ec7-9d76-c4ee83dca258
Result
Threat name:
FormBook, PureLog Stealer
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1590626
Signature
Adds a directory exclusion to Windows Defender
AI detected suspicious sample
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
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
Yara detected PureLog Stealer
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1590626 Sample: New purchase order.exe Startdate: 14/01/2025 Architecture: WINDOWS Score: 100 59 www.nlinecraps.xyz 2->59 61 www.uxemasculine.store 2->61 63 10 other IPs or domains 2->63 77 Found malware configuration 2->77 79 Malicious sample detected (through community Yara rule) 2->79 81 Antivirus detection for URL or domain 2->81 85 13 other signatures 2->85 11 New purchase order.exe 7 2->11         started        15 DjsaCPLWOz.exe 5 2->15         started        signatures3 83 Performs DNS queries to domains with low reputation 59->83 process4 file5 51 C:\Users\user\AppData\...\DjsaCPLWOz.exe, PE32 11->51 dropped 53 C:\Users\...\DjsaCPLWOz.exe:Zone.Identifier, ASCII 11->53 dropped 55 C:\Users\user\AppData\Local\...\tmp96C3.tmp, XML 11->55 dropped 57 C:\Users\user\...57ew purchase order.exe.log, ASCII 11->57 dropped 95 Writes to foreign memory regions 11->95 97 Allocates memory in foreign processes 11->97 99 Adds a directory exclusion to Windows Defender 11->99 101 Injects a PE file into a foreign processes 11->101 17 MSBuild.exe 11->17         started        20 powershell.exe 23 11->20         started        22 powershell.exe 23 11->22         started        24 schtasks.exe 1 11->24         started        103 Multi AV Scanner detection for dropped file 15->103 105 Machine Learning detection for dropped file 15->105 26 MSBuild.exe 15->26         started        28 schtasks.exe 15->28         started        signatures6 process7 signatures8 65 Modifies the context of a thread in another process (thread injection) 17->65 67 Maps a DLL or memory area into another process 17->67 69 Sample uses process hollowing technique 17->69 75 3 other signatures 17->75 30 explorer.exe 57 1 17->30 injected 71 Loading BitLocker PowerShell Module 20->71 32 WmiPrvSE.exe 20->32         started        34 conhost.exe 20->34         started        36 conhost.exe 22->36         started        38 conhost.exe 24->38         started        73 Found direct / indirect Syscall (likely to bypass EDR) 26->73 40 conhost.exe 28->40         started        process9 process10 42 cscript.exe 30->42         started        45 chkdsk.exe 30->45         started        signatures11 87 Modifies the context of a thread in another process (thread injection) 42->87 89 Maps a DLL or memory area into another process 42->89 91 Tries to detect virtualization through RDTSC time measurements 42->91 93 Switches to a custom stack to bypass stack traces 42->93 47 cmd.exe 42->47         started        process12 process13 49 conhost.exe 47->49         started       
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/a3af3dcfd89b655982b6e044b681b140dcefbe0606d69b0b7839b8cda28ccc91
Detection:
formbook
Create hunting rule
Link:
https://mwdb.cert.pl/sample/a3af3dcfd89b655982b6e044b681b140dcefbe0606d69b0b7839b8cda28ccc91/
Threat name:
ByteCode-MSIL.Trojan.SnakeLogger
Create hunting rule
Status:
Malicious
First seen:
2025-01-14 07:12:12 UTC
File Type:
PE (.Net Exe)
Extracted files:
9
AV detection:
20 of 24 (83.33%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=uoxt3t6ytnsvtavw4bclnanridoo7pqga3ljwc3yhg4m3iumzsiq._file
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/250114-mrnkfswkgz/
Behaviour
Scheduled Task/Job: Scheduled Task
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
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/7ed2a3e0-3256-45f5-a8aa-d419b38e6ab4
Unpacked files
SH256 hash:
13e4cd19503453cd78e71f728c9389b2c99e091b215e8ddbec0d81b2f6876f72
MD5 hash:
6a24b2b9224492367a531a14e4c882de
SHA1 hash:
0a55e7a38280f56ad0acdc769e7b795ab22b268a
Detections:
FormBook
Create hunting rule
win_formbook_auto
Create hunting rule
win_formbook_g0
Create hunting rule
win_formbook_w0
Create hunting rule
Windows_Trojan_Formbook
Create hunting rule
Formbook
Create hunting rule
Link:
https://www.unpac.me/results/398c122d-dde8-479f-bb23-157513e29cc8/
Parent samples :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 hash:
9b12f4e30ee0cbb7af8f9d6aeb57295bb1fc801c0695b991a2fb574239fd6054
MD5 hash:
70c1cb874810cc55d31ed6ab47866e1c
SHA1 hash:
8a9bf594d8c3618cb18578bc6b3e297854c285a8
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/398c122d-dde8-479f-bb23-157513e29cc8/
SH256 hash:
3aa7ca05584211acc2467c39553e7a045c6b5ba59ff266127801be4cddbd0cbb
MD5 hash:
35e1b4bc5de79edb713c8692cb4efd38
SHA1 hash:
06e23eedcbfa52850fd10fb7764431a452b90a7e
Detections:
SUSP_OBF_NET_Reactor_Indicators_Jan24
Create hunting rule
Link:
https://www.unpac.me/results/398c122d-dde8-479f-bb23-157513e29cc8/
Parent samples :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 hash:
a3af3dcfd89b655982b6e044b681b140dcefbe0606d69b0b7839b8cda28ccc91
MD5 hash:
1b507df9a13477b647da450a1b79b2e7
SHA1 hash:
b0de85855b3462fe0b37c79831b391eeb044e437
Link:
https://www.unpac.me/results/398c122d-dde8-479f-bb23-157513e29cc8/
Malware family:
FormBook
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/a3af3dcfd89b/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/a3af3dcfd89b655982b6e044b681b140dcefbe0606d69b0b7839b8cda28ccc91

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: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:RANSOMWARE
Create hunting rule
Author:ToroGuitar
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 9c879cc3fc1fae674781f67f8d12beb21afd8c0deb4587f6766bbcbf48c1b084

Formbook

Executable exe a3af3dcfd89b655982b6e044b681b140dcefbe0606d69b0b7839b8cda28ccc91

(this sample)

  
Delivery method
Other
  
Dropped by
SHA256 9c879cc3fc1fae674781f67f8d12beb21afd8c0deb4587f6766bbcbf48c1b084
  
Dropped by
MD5 d2e61aa15cbe306d3351267e99050f55

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