MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 23b9305a71e2b3f191ebf0d37a9cfeafc894dbe417165ea4bc3a0c100fa6c217. 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 3 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 23b9305a71e2b3f191ebf0d37a9cfeafc894dbe417165ea4bc3a0c100fa6c217
SHA3-384 hash: 0b26aa272fc19d6715fabf2a1875fb2c5e2e917455711039d80fd74e4c66e3f7612f219810c0c31cf5870692938a80b2
SHA1 hash: a02bcac3f40b3d9d65a7fd5038fafd979b2198d6
MD5 hash: 5a09e4c2bc3701a7a1e16eb095f20d3d
humanhash: carolina-video-neptune-undress
File name:Arrival Notice - S2304118292.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:927'232 bytes
First seen:2024-02-15 11:01:49 UTC
Last seen:2024-02-19 08:41:58 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'744 x AgentTesla, 19'610 x Formbook, 12'242 x SnakeKeylogger)
ssdeep 12288:SPyr0pghWC5EVCsS3onHVMQnT6fVLlDMwuQpbqmK2vFth2bpi4kD9c3h:0ycM5+L/HNTsLh9u62W9cx
TLSH T11815D0E982061519C83636B8C7B353D927BD1EEBFC42CB0AD5A875B4247E3803619F5E
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 adrian__luca
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
2
# of downloads :
279
Origin country :
HU HU
Vendor Threat Intelligence
Malware family:
agenttesla
Create hunting rule
ID:
1
File name:
23b9305a71e2b3f191ebf0d37a9cfeafc894dbe417165ea4bc3a0c100fa6c217.exe
Verdict:
Malicious activity
Analysis date:
2024-02-15 11:02:20 UTC
Tags:
evasion stealer agenttesla
Link:
https://app.any.run/tasks/b2764531-881c-4316-a801-8933e1786e18

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/476291/
Detection(s):
Porcupine.Malware.58887.UNOFFICIAL
Create hunting rule

Win.Packed.Formbook-10020621-0
Create hunting rule

Win.Packed.Pwsx-10020694-0
Create hunting rule

Win.Packed.Pwsx-10020695-0
Create hunting rule

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
Using the Windows Management Instrumentation requests
DNS request
Connection attempt
Sending a custom TCP request
Sending an HTTP GET request
Reading critical registry keys
Stealing user critical data
Adding an exclusion to Microsoft Defender
Enabling autorun by creating a file
Unauthorized injection to a system process
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
packed remcos
Link:
https://www.filescan.io/uploads/65cdef3bbae89e4fdc4e7e90/reports/76bfd063-23aa-48ff-81a8-0aa454f43b73/overview
Verdict:
Malicious
Labled as:
Trojan.Generic
Link:
https://www.hybrid-analysis.com/sample/23b9305a71e2b3f191ebf0d37a9cfeafc894dbe417165ea4bc3a0c100fa6c217
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/89eb8127-0438-4235-beca-cddbfdad56ab
Result
Threat name:
AgentTesla
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1392771
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
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
Initial sample is a PE file and has a suspicious name
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 domain / URL
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)
Sample uses string decryption to hide its real strings
Sigma detected: Bad Opsec Defaults Sacrificial Processes With Improper Arguments
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 harvest and steal Putty / WinSCP information (sessions, passwords, etc)
Tries to steal Mail credentials (via file / registry access)
Uses schtasks.exe or at.exe to add and modify task schedules
Writes to foreign memory regions
Yara detected AgentTesla
Yara detected AntiVM3
Yara detected Generic Downloader
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1392771 Sample: Arrival Notice - S2304118292.exe Startdate: 15/02/2024 Architecture: WINDOWS Score: 100 42 mail.wasstech.com 2->42 44 ip-api.com 2->44 46 api.ipify.org 2->46 54 Multi AV Scanner detection for domain / URL 2->54 56 Found malware configuration 2->56 58 Malicious sample detected (through community Yara rule) 2->58 60 17 other signatures 2->60 8 Arrival Notice - S2304118292.exe 7 2->8         started        12 xtVtapzPb.exe 5 2->12         started        signatures3 process4 file5 38 C:\Users\user\AppData\Roaming\xtVtapzPb.exe, PE32 8->38 dropped 40 C:\Users\user\AppData\Local\...\tmp5BF3.tmp, XML 8->40 dropped 62 Tries to detect sandboxes and other dynamic analysis tools (process name or module or function) 8->62 64 Writes to foreign memory regions 8->64 66 Allocates memory in foreign processes 8->66 68 Adds a directory exclusion to Windows Defender 8->68 14 RegSvcs.exe 15 2 8->14         started        18 RegSvcs.exe 8->18         started        20 powershell.exe 23 8->20         started        26 2 other processes 8->26 70 Multi AV Scanner detection for dropped file 12->70 72 Machine Learning detection for dropped file 12->72 74 Injects a PE file into a foreign processes 12->74 22 RegSvcs.exe 12->22         started        24 schtasks.exe 12->24         started        signatures6 process7 dnsIp8 48 mail.wasstech.com 204.93.196.181, 49712, 49716, 587 SERVERCENTRALUS United States 14->48 50 ip-api.com 208.95.112.1, 49710, 49715, 80 TUT-ASUS United States 14->50 52 api.ipify.org 104.26.12.205, 443, 49709, 49714 CLOUDFLARENETUS United States 14->52 76 Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines) 18->76 78 Contains functionality to check if a debugger is running (CheckRemoteDebuggerPresent) 18->78 28 WmiPrvSE.exe 20->28         started        30 conhost.exe 20->30         started        80 Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc) 22->80 82 Tries to steal Mail credentials (via file / registry access) 22->82 84 Tries to harvest and steal browser information (history, passwords, etc) 22->84 32 conhost.exe 24->32         started        34 conhost.exe 26->34         started        36 conhost.exe 26->36         started        signatures9 process10
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/23b9305a71e2b3f191ebf0d37a9cfeafc894dbe417165ea4bc3a0c100fa6c217
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/23b9305a71e2b3f191ebf0d37a9cfeafc894dbe417165ea4bc3a0c100fa6c217/
Threat name:
ByteCode-MSIL.Spyware.Negasteal
Create hunting rule
Status:
Malicious
First seen:
2024-02-06 09:27:16 UTC
File Type:
PE (.Net Exe)
Extracted files:
8
AV detection:
21 of 24 (87.50%)
Threat level:
  2/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=eo4tawtr4kz7depl6djxvhh6v7ejjw7ec4lf5jf4higbad5gyilq._file
Verdict:
malicious
Label(s):
agenttesla_v4
Create hunting rule
agenttesla
Create hunting rule
Result
Malware family:
agenttesla
Create hunting rule
Score:
  10/10
Tags:
family:agenttesla keylogger spyware stealer trojan
Link:
https://tria.ge/reports/240215-m45phafd27/
Behaviour
Creates scheduled task(s)
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Suspicious use of SetThreadContext
Looks up external IP address via web service
Checks computer location settings
AgentTesla
Unpacked files
SH256 hash:
ae911514e441d430eff75afa69382d2a951362b5a381f2b0e76949fbcb9a561b
MD5 hash:
f845e2f65057124a2c46c0daaff74a6f
SHA1 hash:
e5213ded7e1e323e93fab29f8112b33d48c59899
Link:
https://www.unpac.me/results/f68c888f-c921-4cf0-abb9-b5a6c3b94372/
SH256 hash:
ecfeccd253ca61fab93341925a617e0d3d7d31cec450326cba351f23f5a04601
MD5 hash:
916b7f4e8aadcbf3c4dff712bff07601
SHA1 hash:
8b38d5374ed95e2b222ac2d7848917eecf67e831
Link:
https://www.unpac.me/results/f68c888f-c921-4cf0-abb9-b5a6c3b94372/
SH256 hash:
a3b82e2d17f660c450ba4dae95a26b906f12626462a4bb9a6c2833071dd9faf5
MD5 hash:
cf3241f04cc546fa617566e84b5c1793
SHA1 hash:
0b9cbe0c45fba268857e11ad4d71105193c19d02
Link:
https://www.unpac.me/results/f68c888f-c921-4cf0-abb9-b5a6c3b94372/
SH256 hash:
49d0077d2284dfc268051e3ee5a7922c9ae9a711c835f16d2ff50f2fcb8c3e37
MD5 hash:
ef55d2aea2322c4bb08d3f1871c39ba2
SHA1 hash:
00440a750c36dca3b9160c1274ded978543b681e
Detections:
AgentTesla
Create hunting rule
win_agent_tesla_g2
Create hunting rule
INDICATOR_SUSPICIOUS_EXE_Referenfces_File_Transfer_Clients
Create hunting rule
Agenttesla_type2
Create hunting rule
INDICATOR_SUSPICIOUS_Binary_References_Browsers
Create hunting rule
INDICATOR_SUSPICIOUS_EXE_VaultSchemaGUID
Create hunting rule
INDICATOR_SUSPICIOUS_EXE_References_Messaging_Clients
Create hunting rule
INDICATOR_SUSPICIOUS_EXE_SandboxHookingDLL
Create hunting rule
INDICATOR_EXE_Packed_GEN01
Create hunting rule
INDICATOR_SUSPICIOUS_EXE_References_Confidential_Data_Store
Create hunting rule
Link:
https://www.unpac.me/results/f68c888f-c921-4cf0-abb9-b5a6c3b94372/
Parent samples :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 hash:
731223cc23140a70d6d7cb3a6894c8fc27b742b1f3dba02ffc82a0809ad4951e
MD5 hash:
7e817168f5b53affbea32c93db801a7e
SHA1 hash:
33c1e77ff5a4e446f0e6aefc68251be343ec38b9
Link:
https://www.unpac.me/results/f68c888f-c921-4cf0-abb9-b5a6c3b94372/
SH256 hash:
23b9305a71e2b3f191ebf0d37a9cfeafc894dbe417165ea4bc3a0c100fa6c217
MD5 hash:
5a09e4c2bc3701a7a1e16eb095f20d3d
SHA1 hash:
a02bcac3f40b3d9d65a7fd5038fafd979b2198d6
Link:
https://www.unpac.me/results/f68c888f-c921-4cf0-abb9-b5a6c3b94372/
Malware family:
AgentTesla
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/23b9305a71e2/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/23b9305a71e2b3f191ebf0d37a9cfeafc894dbe417165ea4bc3a0c100fa6c217

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:pe_imphash
Create hunting rule
Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash

File information

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

Malspam

Formbook

Executable exe 23b9305a71e2b3f191ebf0d37a9cfeafc894dbe417165ea4bc3a0c100fa6c217

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/476291/

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