MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 539fcce4d58770b81cc10d650f7ef810d9e933ec5901cd051f110d574b2c6868. 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: 17


Intelligence 17 IOCs YARA 17 File information Comments
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SHA256 hash: 539fcce4d58770b81cc10d650f7ef810d9e933ec5901cd051f110d574b2c6868
SHA3-384 hash: 468aa1527e7c3ebe82972cab93dbc7e863d6d0ef07627d4e64a1d8b64e01d27886dad35de4dfea9ca58cbe1b9be8b940
SHA1 hash: f0bc35f5feb7581ac2e7a5704c51e37ec99e181f
MD5 hash: 133841f45fda98eeaa5d5c7a46da5cf3
humanhash: low-connecticut-magazine-diet
File name:SecuriteInfo.com.Win32.PWSX-gen.17533.13867
Download: download sample
Signature Formbook
Create hunting rule
File size:926'720 bytes
First seen:2024-02-06 11:26:18 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'658 x AgentTesla, 19'469 x Formbook, 12'208 x SnakeKeylogger)
ssdeep 12288:Pv1Nxy8piWjqqHDxQ6q3kUHKNK7Gkw0W3+CahH6N70kD9c3h:H1NxyiiWZVQFNHKNK7Gkw58H6D9cx
Threatray 175 similar samples on MalwareBazaar
TLSH T1B815DFF982065519C83526B8C37353EE17BD1EE6BC56C70A84E875B8647E380360AF9F
TrID 71.1% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
10.2% (.EXE) Win64 Executable (generic) (10523/12/4)
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)
Reporter SecuriteInfoCom
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
1
# of downloads :
295
Origin country :
FR FR
Vendor Threat Intelligence
Malware family:
agenttesla
Create hunting rule
ID:
1
File name:
539fcce4d58770b81cc10d650f7ef810d9e933ec5901cd051f110d574b2c6868.exe
Verdict:
Malicious activity
Analysis date:
2024-02-06 11:26:35 UTC
Tags:
evasion stealer agenttesla
Link:
https://app.any.run/tasks/3c9ea3a9-f524-4e73-93e5-2c98234bebbe

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
AgentTesla
Create hunting rule
Link:
https://www.capesandbox.com/analysis/474842/
Detection(s):
SecuriteInfo.com.Win32.PWSX-gen.17533.13867.UNOFFICIAL
Create hunting rule

Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
packed
Link:
https://www.filescan.io/uploads/65c2178c0b80a407289438a4/reports/db4517ae-694d-4f4f-afcb-346dfd192437/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
Link:
https://www.hybrid-analysis.com/sample/539fcce4d58770b81cc10d650f7ef810d9e933ec5901cd051f110d574b2c6868
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:
Agent Tesla
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/2a828da9-25ff-4cf0-89eb-cde82a54055c
Result
Threat name:
AgentTesla
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1387467
Signature
.NET source code contains potential unpacker
.NET source code contains very large array initializations
Adds a directory exclusion to Windows Defender
Check if machine is in data center or colocation facility
Contains functionality to check if a debugger is running (CheckRemoteDebuggerPresent)
Contains functionality to log keystrokes (.Net Source)
Found malware configuration
Hides that the sample has been downloaded from the Internet (zone.identifier)
Injects a PE file into a foreign processes
Machine Learning detection for dropped file
Machine Learning detection for sample
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines)
Sigma detected: Powershell Base64 Encoded MpPreference Cmdlet
Sigma detected: Scheduled temp file as task from temp location
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Tries to harvest and steal browser information (history, passwords, etc)
Tries to steal Mail credentials (via file / registry access)
Uses schtasks.exe or at.exe to add and modify task schedules
Yara detected AgentTesla
Yara detected AntiVM3
Yara detected Generic Downloader
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1387467 Sample: SecuriteInfo.com.Win32.PWSX... Startdate: 06/02/2024 Architecture: WINDOWS Score: 100 67 us2.smtp.mailhostbox.com 2->67 69 ip-api.com 2->69 71 Found malware configuration 2->71 73 Malicious sample detected (through community Yara rule) 2->73 75 Sigma detected: Scheduled temp file as task from temp location 2->75 77 10 other signatures 2->77 9 SecuriteInfo.com.Win32.PWSX-gen.17533.13867.exe 7 2->9         started        13 CvXkNxjmG.exe 5 2->13         started        15 ZUHFqcY.exe 2->15         started        signatures3 process4 file5 59 C:\Users\user\AppData\Roaming\CvXkNxjmG.exe, PE32 9->59 dropped 61 C:\Users\user\AppData\Local\...\tmpDE2F.tmp, XML 9->61 dropped 89 Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines) 9->89 91 Tries to detect sandboxes and other dynamic analysis tools (process name or module or function) 9->91 93 Uses schtasks.exe or at.exe to add and modify task schedules 9->93 101 2 other signatures 9->101 17 SecuriteInfo.com.Win32.PWSX-gen.17533.13867.exe 16 5 9->17         started        22 ZUHFqcY.exe 9->22         started        24 powershell.exe 22 9->24         started        26 schtasks.exe 1 9->26         started        95 Multi AV Scanner detection for dropped file 13->95 97 Machine Learning detection for dropped file 13->97 99 Injects a PE file into a foreign processes 13->99 28 CvXkNxjmG.exe 13->28         started        30 schtasks.exe 1 13->30         started        32 ZUHFqcY.exe 15->32         started        34 schtasks.exe 15->34         started        signatures6 process7 dnsIp8 63 ip-api.com 208.95.112.1, 49717, 49722, 49726 TUT-ASUS United States 17->63 65 us2.smtp.mailhostbox.com 208.91.199.225, 49719, 49724, 49728 PUBLIC-DOMAIN-REGISTRYUS United States 17->65 55 C:\Users\user\AppData\Roaming\...\ZUHFqcY.exe, PE32 17->55 dropped 57 C:\Users\user\...\ZUHFqcY.exe:Zone.Identifier, ASCII 17->57 dropped 79 Tries to steal Mail credentials (via file / registry access) 17->79 81 Hides that the sample has been downloaded from the Internet (zone.identifier) 17->81 83 Injects a PE file into a foreign processes 22->83 36 ZUHFqcY.exe 22->36         started        39 schtasks.exe 22->39         started        41 ZUHFqcY.exe 22->41         started        43 WmiPrvSE.exe 24->43         started        45 conhost.exe 24->45         started        47 conhost.exe 26->47         started        49 conhost.exe 30->49         started        51 conhost.exe 34->51         started        file9 signatures10 process11 signatures12 85 Tries to steal Mail credentials (via file / registry access) 36->85 87 Tries to harvest and steal browser information (history, passwords, etc) 36->87 53 conhost.exe 39->53         started        process13
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/539fcce4d58770b81cc10d650f7ef810d9e933ec5901cd051f110d574b2c6868
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/539fcce4d58770b81cc10d650f7ef810d9e933ec5901cd051f110d574b2c6868/
Threat name:
ByteCode-MSIL.Spyware.Negasteal
Create hunting rule
Status:
Malicious
First seen:
2024-02-06 08:06:21 UTC
File Type:
PE (.Net Exe)
Extracted files:
8
AV detection:
17 of 24 (70.83%)
Threat level:
  2/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=kop4zzgvq5ylqhgbbvsq67xycdm6sm7mlea42bi7cegvoszmnbua._file
Verdict:
malicious
Label(s):
agenttesla_v4
Create hunting rule
agenttesla
Create hunting rule
Similar samples:
18a28d815375c485b44c9ff8ffef19411083d9bee508e7c52d85ed4edcca5b12
Formbook
539fcce4d58770b81cc10d650f7ef810d9e933ec5901cd051f110d574b2c6868
Formbook
8f9500ab199475ccae799126de8156b316fb9b200e1f3429b7b5b5baece8ab46
Formbook
b226cb72338d093e8d2c002963375994cc8f8992889d72207e7217aef2940ab3
Formbook
e7e75eae5d4bf17651e97bb0119c666e8db5c4f52fc60e5bf9d3a55155c2dd47
Formbook
f0a114654cba048408e9f71cf96233df16bde54f00041909567761bc5eb4e38e
Formbook
+ 165 additional samples on MalwareBazaar
Result
Malware family:
agenttesla
Create hunting rule
Score:
  10/10
Tags:
family:agenttesla keylogger persistence spyware stealer trojan
Link:
https://tria.ge/reports/240206-nkeveaehd4/
Behaviour
Creates scheduled task(s)
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Suspicious use of SetThreadContext
Adds Run key to start application
Looks up external IP address via web service
Checks computer location settings
Reads user/profile data of local email clients
Reads user/profile data of web browsers
AgentTesla
Unpacked files
SH256 hash:
b12806cfc459d707518ce982849166ca99e95df5e05d4bc7bde7d3f4942cfe0e
MD5 hash:
7c59960bd60eda6f3da4824d1dd30e5e
SHA1 hash:
ab771360df8926364dee0758a6fb6814576fd03e
Link:
https://www.unpac.me/results/6e40efb5-c5ea-47a0-96fc-83f16e2e8201/
SH256 hash:
f599e2f61695060bd17eaddb36a8bdf2292d84c16bfb551e60614aaaea9806e8
MD5 hash:
f492936a1b25ff3167b9f5617666ef88
SHA1 hash:
778e2d19585bf283c5f2cf6bbd22d9fdafe5ac74
Detections:
AgentTesla
Create hunting rule
win_agent_tesla_g2
Create hunting rule
Link:
https://www.unpac.me/results/6e40efb5-c5ea-47a0-96fc-83f16e2e8201/
Parent samples :
539fcce4d58770b81cc10d650f7ef810d9e933ec5901cd051f110d574b2c6868
53c48a7e304a44854fa0beacc7cfe3089e43f4e7bc8814856835108c459c63af
9faa22a52fe3164c68961b7ea1fe0c88313bcfe86e111964bc6e7a00a98b201a
460b2b74ef23d427bef4a5406b8b2cc09b4b1efa178cd0f32b6ac105253f237a
SH256 hash:
70bc26436d8c8c3a584dc349e0be30937429a1666785b52f84c80e2acd36ba68
MD5 hash:
6000d52e0be2406b4884e06a0eb3b743
SHA1 hash:
3a296c8210b91fe16cda2cff967572000855ec5d
Link:
https://www.unpac.me/results/6e40efb5-c5ea-47a0-96fc-83f16e2e8201/
SH256 hash:
a3b82e2d17f660c450ba4dae95a26b906f12626462a4bb9a6c2833071dd9faf5
MD5 hash:
cf3241f04cc546fa617566e84b5c1793
SHA1 hash:
0b9cbe0c45fba268857e11ad4d71105193c19d02
Link:
https://www.unpac.me/results/6e40efb5-c5ea-47a0-96fc-83f16e2e8201/
SH256 hash:
539fcce4d58770b81cc10d650f7ef810d9e933ec5901cd051f110d574b2c6868
MD5 hash:
133841f45fda98eeaa5d5c7a46da5cf3
SHA1 hash:
f0bc35f5feb7581ac2e7a5704c51e37ec99e181f
Link:
https://www.unpac.me/results/6e40efb5-c5ea-47a0-96fc-83f16e2e8201/
Malware family:
AgentTesla
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/539fcce4d587/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/539fcce4d58770b81cc10d650f7ef810d9e933ec5901cd051f110d574b2c6868

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:AgentTeslaV3
Create hunting rule
Author:ditekshen
Description:AgentTeslaV3 infostealer payload
Rule name:DebuggerCheck__RemoteAPI
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:INDICATOR_EXE_Packed_GEN01
Create hunting rule
Author:ditekSHen
Description:Detect packed .NET executables. Mostly AgentTeslaV4.
Rule name:INDICATOR_SUSPICIOUS_Binary_References_Browsers
Create hunting rule
Author:ditekSHen
Description:Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers.
Rule name:INDICATOR_SUSPICIOUS_EXE_References_Confidential_Data_Store
Create hunting rule
Author:ditekSHen
Description:Detects executables referencing many confidential data stores found in browsers, mail clients, cryptocurreny wallets, etc. Observed in information stealers
Rule name:INDICATOR_SUSPICIOUS_EXE_References_Messaging_Clients
Create hunting rule
Author:ditekSHen
Description:Detects executables referencing many email and collaboration clients. Observed in information stealers
Rule name:INDICATOR_SUSPICIOUS_EXE_Referenfces_File_Transfer_Clients
Create hunting rule
Author:ditekSHen
Description:Detects executables referencing many file transfer clients. Observed in information stealers
Rule name:INDICATOR_SUSPICIOUS_EXE_SandboxHookingDLL
Create hunting rule
Author:ditekSHen
Description:Detects binaries and memory artifacts referencing sandbox DLLs typically observed in sandbox evasion
Rule name:INDICATOR_SUSPICIOUS_EXE_VaultSchemaGUID
Create hunting rule
Author:ditekSHen
Description:Detects executables referencing Windows vault credential objects. Observed in infostealers
Rule name:malware_Agenttesla_type2
Create hunting rule
Author:JPCERT/CC Incident Response Group
Description:detect Agenttesla in memory
Reference:internal research
Rule name:Multifamily_RAT_Detection
Create hunting rule
Author:Lucas Acha (http://www.lukeacha.com)
Description:Generic Detection for multiple RAT families, PUPs, Packers and suspicious executables
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:Windows_Trojan_AgentTesla_ebf431a8
Create hunting rule
Author:Elastic Security

File information

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

Cape
Cape
https://www.capesandbox.com/analysis/474842/

Comments