MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 99cb75d06c6012343153cad4f2d5a0cbb8f161569d1178301a81e45087753e15. 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


AgentTesla


Vendor detections: 18


Intelligence 18 IOCs YARA 16 File information Comments
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SHA256 hash: 99cb75d06c6012343153cad4f2d5a0cbb8f161569d1178301a81e45087753e15
SHA3-384 hash: 5841db6cf8a62f2fcd529d7cdf619acf84785f60e2f8c5bae192dc24674020caa8602ef2078f31dbade36cdb4e6a2015
SHA1 hash: 0779c2a6c2c948cdc473373a1c0dcb41bfff5e46
MD5 hash: e37cd2c991be930520094df583f0e6f4
humanhash: texas-december-robert-winner
File name:Arrival Notice.exe
Download: download sample
Signature AgentTesla
Create hunting rule
File size:779'776 bytes
First seen:2024-03-07 17:54:29 UTC
Last seen:2024-03-11 14:14:52 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'652 x AgentTesla, 19'463 x Formbook, 12'204 x SnakeKeylogger)
ssdeep 12288:/lOl0Vb3Ll8fcnwaZ/gGAGCPjcqh//SdFpgW/OH/PrPn7xF6Vyy1gjo+:/cELh8YBvhS9hSD6WWLPn1F6VvU
Threatray 365 similar samples on MalwareBazaar
TLSH T15AF422413E988B82E2FEC7B512A5CD40733B952B6460FF6E1E9915EE0134F554B82F27
TrID 63.0% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
11.2% (.SCR) Windows screen saver (13097/50/3)
9.0% (.EXE) Win64 Executable (generic) (10523/12/4)
5.6% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
3.8% (.EXE) Win32 Executable (generic) (4504/4/1)
Reporter James_inthe_box
Tags:AgentTesla exe

Intelligence

File Origin
# of uploads :
5
# of downloads :
333
Origin country :
US US
Vendor Threat Intelligence
Malware family:
agenttesla
Create hunting rule
ID:
1
File name:
99cb75d06c6012343153cad4f2d5a0cbb8f161569d1178301a81e45087753e15.exe
Verdict:
Malicious activity
Analysis date:
2024-03-07 18:34:37 UTC
Tags:
agenttesla stealer
Link:
https://app.any.run/tasks/fa0557d4-682f-49fb-8135-8c22b1b5756c

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
Porcupine.Malware.58887.UNOFFICIAL
Create hunting rule

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
Using the Windows Management Instrumentation requests
DNS request
Connection attempt
Sending a custom TCP request
Reading critical registry keys
Sending an HTTP GET request
Stealing user critical data
Enabling autorun by creating a file
Unauthorized injection to a system process
Adding an exclusion to Microsoft Defender
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
packed
Link:
https://www.filescan.io/uploads/65e9ff7a5cd908a33da8e6ea/reports/d27aaa8f-e794-4658-a7e2-c527a2991f00/overview
Verdict:
Malicious
Labled as:
Malware
Link:
https://www.hybrid-analysis.com/sample/99cb75d06c6012343153cad4f2d5a0cbb8f161569d1178301a81e45087753e15
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/19f73a5e-bc5b-4bd8-b9f2-522c800924d4
Result
Threat name:
AgentTesla
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1404979
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
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 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: 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 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
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1404979 Sample: Arrival Notice.exe Startdate: 07/03/2024 Architecture: WINDOWS Score: 100 42 mail.hhipune.com 2->42 44 api.ipify.org 2->44 50 Found malware configuration 2->50 52 Malicious sample detected (through community Yara rule) 2->52 54 Sigma detected: Scheduled temp file as task from temp location 2->54 56 12 other signatures 2->56 8 Arrival Notice.exe 7 2->8         started        12 ZWFwcWQNKHI.exe 5 2->12         started        signatures3 process4 file5 38 C:\Users\user\AppData\...\ZWFwcWQNKHI.exe, PE32 8->38 dropped 40 C:\Users\user\AppData\Local\...\tmpEAB5.tmp, XML 8->40 dropped 58 Writes to foreign memory regions 8->58 60 Allocates memory in foreign processes 8->60 62 Adds a directory exclusion to Windows Defender 8->62 14 RegSvcs.exe 15 2 8->14         started        18 powershell.exe 23 8->18         started        20 powershell.exe 23 8->20         started        22 schtasks.exe 1 8->22         started        64 Multi AV Scanner detection for dropped file 12->64 66 Machine Learning detection for dropped file 12->66 68 Injects a PE file into a foreign processes 12->68 24 RegSvcs.exe 12->24         started        26 schtasks.exe 12->26         started        signatures6 process7 dnsIp8 46 mail.hhipune.com 85.187.128.52, 49717, 49720, 587 A2HOSTINGUS United States 14->46 48 api.ipify.org 104.26.13.205, 443, 49715, 49719 CLOUDFLARENETUS United States 14->48 70 Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc) 14->70 72 Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines) 14->72 74 Tries to steal Mail credentials (via file / registry access) 14->74 28 conhost.exe 18->28         started        30 WmiPrvSE.exe 18->30         started        32 conhost.exe 20->32         started        34 conhost.exe 22->34         started        76 Tries to harvest and steal browser information (history, passwords, etc) 24->76 36 conhost.exe 26->36         started        signatures9 process10
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/99cb75d06c6012343153cad4f2d5a0cbb8f161569d1178301a81e45087753e15
Detection:
agenttesla
Create hunting rule
Link:
https://mwdb.cert.pl/sample/99cb75d06c6012343153cad4f2d5a0cbb8f161569d1178301a81e45087753e15/
Threat name:
Win32.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2024-03-07 13:43:10 UTC
File Type:
PE (.Net Exe)
Extracted files:
27
AV detection:
19 of 24 (79.17%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=thfxludmmajdimktzlkpfvnazo4pcykwtuixqma2qhsfbb3vhykq._file
Verdict:
malicious
Label(s):
agenttesla_v4
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agenttesla
Create hunting rule
Similar samples:
061d22ce82c411b7a7a101fcb6fd0836f420b1800a7e5b241089fc819cfd4451
AgentTesla
11d7212106c1e7d65ca5b3a3d6c197775e224c151b89900de265e6efcbb68322
AgentTesla
36870ed67d32b8398243d77c47975603750cc92e9821db555b8e2b2df4d3d3b6
AgentTesla
92c2e29583a5387aaa8c516cb90679f79204fe6c6b599d728a3a2edd0d80c6d8
AgentTesla
+ 355 additional samples on MalwareBazaar
Result
Malware family:
agenttesla
Create hunting rule
Score:
  10/10
Tags:
family:agenttesla keylogger spyware stealer trojan
Link:
https://tria.ge/reports/240307-whfypaad4t/
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:
d44677476457bb2a32710759c89bc4cae51db4dbd67c848f1f0ead8ac09bb399
MD5 hash:
92acf5502f66dab31b9e3ab3a3c42e59
SHA1 hash:
e64cbe5c39cf9427e35bc0aa96d7fcb76885d403
Link:
https://www.unpac.me/results/df31c90f-8de8-4b18-80f7-c871ea9283a0/
SH256 hash:
c10c9b0882bac6f788f48b4dabe3291b14e639e650f2b9fcb0bc174ac92ae02b
MD5 hash:
7c7fb6daa78beb69128991ff893143ed
SHA1 hash:
c01bb99984b12b84129db80eae1d5d8341a358e2
Link:
https://www.unpac.me/results/df31c90f-8de8-4b18-80f7-c871ea9283a0/
SH256 hash:
3e84443516e6582e8273ddcb839a4466d3d85ee1b2f87e4686f01f0d45dc0918
MD5 hash:
e49d6ff037234c017d1f596c48dd91df
SHA1 hash:
8c525b54734691cdf47a4b55518ca43ae1311ee5
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_EXE_Packed_GEN01
Create hunting rule
INDICATOR_SUSPICIOUS_EXE_References_Confidential_Data_Store
Create hunting rule
Link:
https://www.unpac.me/results/df31c90f-8de8-4b18-80f7-c871ea9283a0/
Parent samples :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 hash:
996efd1a33d04923f83df8ffc31191b10b6a15ef56d8961351673c74416f7506
MD5 hash:
95046bfbc193c1faa89d6a32c870082c
SHA1 hash:
0c707a044df00706628eff48e982d29006c59aeb
Link:
https://www.unpac.me/results/df31c90f-8de8-4b18-80f7-c871ea9283a0/
SH256 hash:
99cb75d06c6012343153cad4f2d5a0cbb8f161569d1178301a81e45087753e15
MD5 hash:
e37cd2c991be930520094df583f0e6f4
SHA1 hash:
0779c2a6c2c948cdc473373a1c0dcb41bfff5e46
Link:
https://www.unpac.me/results/df31c90f-8de8-4b18-80f7-c871ea9283a0/
Malware family:
AgentTesla
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/99cb75d06c60/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
0.90
Link:
https://yomi.yoroi.company/submissions/99cb75d06c6012343153cad4f2d5a0cbb8f161569d1178301a81e45087753e15

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:AgentTesla_DIFF_Common_Strings_01
Create hunting rule
Author:schmidtsz
Description:Identify partial Agent Tesla strings
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_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: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_Generic_Threat_9f4a80b2
Create hunting rule
Author:Elastic Security
Rule name:Windows_Trojan_AgentTesla_ebf431a8
Create hunting rule
Author:Elastic Security
Reference:https://www.elastic.co/security-labs/attack-chain-leads-to-xworm-and-agenttesla

File information

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

Malspam

AgentTesla

zip 12c41cd166ce0369329c7577b3c1b4eb32da2dc12ab14189224c42afa52074ec

AgentTesla

Executable exe 99cb75d06c6012343153cad4f2d5a0cbb8f161569d1178301a81e45087753e15

(this sample)

  
Delivery method
Other
  
Dropped by
SHA256 12c41cd166ce0369329c7577b3c1b4eb32da2dc12ab14189224c42afa52074ec
  
Dropped by
MD5 a5e504aa627790a96c3b74c202aaa3c5

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