MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 51f793789b534af84e377bfa1d9686038108885b89f05e3966e34ec31027f4e4. 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: 13


Intelligence 13 IOCs YARA 6 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 51f793789b534af84e377bfa1d9686038108885b89f05e3966e34ec31027f4e4
SHA3-384 hash: 83a4eb1e1f2851e71a7ea642ca456666cfe80c635de1403986c34ccf1df610f8ddc32cb2c17fb782e1b1618352bc5a40
SHA1 hash: 8250a887a1a59913de5a1b8e461ad2bad73a7546
MD5 hash: d367df87fa58083dbd4a3e0337f3b1b8
humanhash: earth-winner-fillet-dakota
File name:attached invoice.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:764'928 bytes
First seen:2024-12-03 08:37:13 UTC
Last seen:2024-12-09 07:29:16 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'647 x AgentTesla, 19'451 x Formbook, 12'201 x SnakeKeylogger)
ssdeep 12288:WIR4R52J+XtdA615bgbHA2A96+ULdL6hdakPrGT6vQ6+uuoO4IV0qfx8IRi:WIeeyAFHAv96lV8dbPr46Yxz0qfx8I4
Threatray 2 similar samples on MalwareBazaar
TLSH T11BF4129C6956C406CF4416340F72F2B82BAC5ECEE911A2275FEDBDEBFC769252C44182
TrID 69.7% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
10.0% (.EXE) Win64 Executable (generic) (10522/11/4)
6.2% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
4.2% (.EXE) Win32 Executable (generic) (4504/4/1)
1.9% (.EXE) Win16/32 Executable Delphi generic (2072/23)
Magika pebin
File icon (PE):PE icon
dhash icon e44ad8ccc8a4a0c0 (22 x Formbook, 4 x RemcosRAT, 3 x AgentTesla)
Reporter Anonymous
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
2
# of downloads :
411
Origin country :
PL PL
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
attached invoice.exe
Verdict:
No threats detected
Analysis date:
2024-12-03 08:45:47 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/96745715-46e6-48cd-8340-9035baf7597e

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
SecuriteInfo.com.Win32.RATX-gen.22879.2814.UNOFFICIAL
Create hunting rule

Verdict:
Malicious
Score:
93.3%
Link:
https://cyber-fortress.com/docs/result/index.php?id=674ec4c0e64d1c722d7bafa6
Tags:
virus gates micro
Result
Verdict:
Clean
Maliciousness:

Behaviour
Creating a window
Unauthorized injection to a recently created process
Restart of the analyzed sample
Creating a file
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
masquerade packed packed packer_detected
Link:
https://www.filescan.io/uploads/674ec36d44b67042f0d2d7db/reports/aedb980f-1df1-43d5-91a8-cfcb428a766e/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
Link:
https://www.hybrid-analysis.com/sample/51f793789b534af84e377bfa1d9686038108885b89f05e3966e34ec31027f4e4
Malware family:
KeyBase
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/d8f00d0f-2945-411f-956c-59519d5ebe27
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad.spyw
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1567213
Signature
.NET source code contains potential unpacker
Found direct / indirect Syscall (likely to bypass EDR)
Initial sample is a PE file and has a suspicious name
Injects a PE file into a foreign processes
Machine Learning detection for sample
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
Performs DNS queries to domains with low reputation
Queues an APC in another process (thread injection)
Suricata IDS alerts for network traffic
Switches to a custom stack to bypass stack traces
Tries to harvest and steal browser information (history, passwords, etc)
Tries to steal Mail credentials (via file / registry access)
Yara detected AntiVM3
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1567213 Sample: attached invoice.exe Startdate: 03/12/2024 Architecture: WINDOWS Score: 100 34 www.aktmarket.xyz 2->34 36 www.seeseye.website 2->36 38 24 other IPs or domains 2->38 42 Suricata IDS alerts for network traffic 2->42 44 Multi AV Scanner detection for submitted file 2->44 46 Yara detected FormBook 2->46 50 5 other signatures 2->50 10 attached invoice.exe 3 2->10         started        signatures3 48 Performs DNS queries to domains with low reputation 34->48 process4 file5 26 C:\Users\user\...\attached invoice.exe.log, ASCII 10->26 dropped 60 Injects a PE file into a foreign processes 10->60 14 attached invoice.exe 10->14         started        signatures6 process7 signatures8 62 Modifies the context of a thread in another process (thread injection) 14->62 64 Maps a DLL or memory area into another process 14->64 66 Queues an APC in another process (thread injection) 14->66 68 Found direct / indirect Syscall (likely to bypass EDR) 14->68 17 RAVCpl64.exe 14->17 injected process9 dnsIp10 28 www.dymar.shop 185.68.16.160, 49918, 49919, 49920 UKRAINE-ASUA Ukraine 17->28 30 www.seeseye.website 103.224.182.242, 49910, 49911, 49912 TRELLIAN-AS-APTrellianPtyLimitedAU Australia 17->30 32 12 other IPs or domains 17->32 40 Found direct / indirect Syscall (likely to bypass EDR) 17->40 21 cacls.exe 13 17->21         started        signatures11 process12 signatures13 52 Tries to steal Mail credentials (via file / registry access) 21->52 54 Tries to harvest and steal browser information (history, passwords, etc) 21->54 56 Modifies the context of a thread in another process (thread injection) 21->56 58 2 other signatures 21->58 24 firefox.exe 21->24         started        process14
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/51f793789b534af84e377bfa1d9686038108885b89f05e3966e34ec31027f4e4
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/51f793789b534af84e377bfa1d9686038108885b89f05e3966e34ec31027f4e4/
Threat name:
ByteCode-MSIL.Spyware.AsyncRAT
Create hunting rule
Status:
Malicious
First seen:
2024-12-03 02:41:59 UTC
File Type:
PE (.Net Exe)
Extracted files:
7
AV detection:
25 of 38 (65.79%)
Threat level:
  2/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=kh3zg6e3knfpqtrxpp5b3fugaoaqrcc3rhyf4olg4nhmgebh6tsa._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
unknown_loader_037
Create hunting rule
Similar samples:
12827eaf4cbb6271dc4e42b0a3bf5f1d5ac0b4fe0476af2a4b9479bc69ba6710
Formbook
51f793789b534af84e377bfa1d9686038108885b89f05e3966e34ec31027f4e4
Formbook
error
Formbook
Result
Malware family:
n/a
Score:
  5/10
Tags:
discovery
Link:
https://tria.ge/reports/241203-kjp27stjfj/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
System Location Discovery: System Language Discovery
Suspicious use of SetThreadContext
Verdict:
Suspicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/1bf13f5a-7d3a-441e-9e90-92956e511a41
Unpacked files
SH256 hash:
f6e801540b0efe1b0c57a4b85d5d6371df9e1f4e01b651423f40763144f67b82
MD5 hash:
e2a54de967eb34b5f61e8359232716f2
SHA1 hash:
0986e4c6310d7652217e9ba0310ef76ed387af4a
Link:
https://www.unpac.me/results/1ba1df5c-5eb1-443a-8005-0fda43fed495/
SH256 hash:
48c1416f6b6a61e1ee051b1987025186fe016a1d5c75cb6d9e17df41bb420271
MD5 hash:
53ca009966e183fb017ed0ce402cb19d
SHA1 hash:
b4ef2c1fde4997ea0c8a3f0492605680df2a6b21
Link:
https://www.unpac.me/results/1ba1df5c-5eb1-443a-8005-0fda43fed495/
SH256 hash:
8617d9b0b23a6d2d099a9215927636fc7109e6336d3b782c111eb9ef62db2470
MD5 hash:
4a552f9af86b414f402df62b8047574c
SHA1 hash:
32429eb6f7bac262f5885376bb88c555f8505d77
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/1ba1df5c-5eb1-443a-8005-0fda43fed495/
SH256 hash:
acf09c80699691d3a6a8d52577d06a7054c1bda1953a55527251e92e15ba037f
MD5 hash:
69473b5123488cff4aae599aa14eb3a4
SHA1 hash:
1d3562fd2fb55582cb97441b9f01065dd80373fc
Link:
https://www.unpac.me/results/1ba1df5c-5eb1-443a-8005-0fda43fed495/
SH256 hash:
51f793789b534af84e377bfa1d9686038108885b89f05e3966e34ec31027f4e4
MD5 hash:
d367df87fa58083dbd4a3e0337f3b1b8
SHA1 hash:
8250a887a1a59913de5a1b8e461ad2bad73a7546
Link:
https://www.unpac.me/results/1ba1df5c-5eb1-443a-8005-0fda43fed495/
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/51f793789b53/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/51f793789b534af84e377bfa1d9686038108885b89f05e3966e34ec31027f4e4

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: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: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.

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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