MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 99a1c20b08ce68a8b787a7234d5421a4c7e1f1607de03c91ee346e93373a4041. 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: 17


Intelligence 17 IOCs YARA 20 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 99a1c20b08ce68a8b787a7234d5421a4c7e1f1607de03c91ee346e93373a4041
SHA3-384 hash: 1cc4b26c8c66b46deb46bce178a40e9aa97900e4c8c613a8e62e9769d51cd238a75ef35bb203d50b018caf5a26edc8a8
SHA1 hash: 9b28273832a99430c0a6ce222ab0b70405db326c
MD5 hash: ad1b5eb8ac04a99c743e615b81bbab9e
humanhash: winter-cola-may-comet
File name:URGENT REQUEST FOR QUOTATION.exe
Download: download sample
Signature AgentTesla
Create hunting rule
File size:817'672 bytes
First seen:2024-03-06 08:51:12 UTC
Last seen:2024-03-06 08:51:13 UTC
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:fnq02iNsuS+EFLbTqwQOVCJPZZ1PmajfbCD0TRHmRlImR4yBW5ljvKeJcMfUKkkR:fnz1E7q9VNZZphjY0TRHqRSySl1qMd
Threatray 112 similar samples on MalwareBazaar
TLSH T17E051245A6E81798F7FE4BBA2AF1E4245BF376769A60C35C0DD8A0CD1C23BD4045A633
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 threatcat_ch
Tags:AgentTesla exe

Intelligence

File Origin
# of uploads :
2
# of downloads :
365
Origin country :
CH CH
Vendor Threat Intelligence
Malware family:
agenttesla
Create hunting rule
ID:
1
File name:
99a1c20b08ce68a8b787a7234d5421a4c7e1f1607de03c91ee346e93373a4041.exe
Verdict:
Malicious activity
Analysis date:
2024-03-06 08:55:27 UTC
Tags:
stealer agenttesla
Link:
https://app.any.run/tasks/98c6fb5e-4d77-4817-972d-8bd30ef398a8

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
SecuriteInfo.com.MSIL.Kryptik.WZA.UNOFFICIAL
Create hunting rule

Porcupine.Malware.58887.UNOFFICIAL
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
Creating a file in the %AppData% subdirectories
Reading critical registry keys
DNS request
Connection attempt
Sending a custom TCP request
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Stealing user critical data
Adding an exclusion to Microsoft Defender
Enabling autorun by creating a file
Unauthorized injection to a system process
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
overlay packed
Link:
https://www.filescan.io/uploads/65e82eb283aa71d5c145b303/reports/8041b200-b083-4499-bc59-8e4dcfb607e7/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
Link:
https://www.hybrid-analysis.com/sample/99a1c20b08ce68a8b787a7234d5421a4c7e1f1607de03c91ee346e93373a4041
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/272e91f3-2be9-4ace-8603-daf329376d6a
Result
Threat name:
AgentTesla
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1403874
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
Hides that the sample has been downloaded from the Internet (zone.identifier)
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
Yara detected Generic Downloader
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1403874 Sample: URGENT REQUEST FOR QUOTATION.exe Startdate: 06/03/2024 Architecture: WINDOWS Score: 100 55 mail.mcltransindo.com 2->55 59 Found malware configuration 2->59 61 Malicious sample detected (through community Yara rule) 2->61 63 Sigma detected: Scheduled temp file as task from temp location 2->63 65 13 other signatures 2->65 8 URGENT REQUEST FOR QUOTATION.exe 7 2->8         started        12 RFVWPv.exe 5 2->12         started        14 boqXv.exe 2->14         started        16 boqXv.exe 2->16         started        signatures3 process4 file5 51 C:\Users\user\AppData\Roaming\RFVWPv.exe, PE32 8->51 dropped 53 C:\Users\user\AppData\Local\...\tmp7EE5.tmp, XML 8->53 dropped 77 Writes to foreign memory regions 8->77 79 Allocates memory in foreign processes 8->79 81 Adds a directory exclusion to Windows Defender 8->81 18 RegSvcs.exe 1 4 8->18         started        23 powershell.exe 23 8->23         started        25 powershell.exe 23 8->25         started        27 schtasks.exe 1 8->27         started        83 Multi AV Scanner detection for dropped file 12->83 85 Machine Learning detection for dropped file 12->85 87 Injects a PE file into a foreign processes 12->87 29 RegSvcs.exe 12->29         started        31 schtasks.exe 12->31         started        33 RegSvcs.exe 12->33         started        35 conhost.exe 14->35         started        37 conhost.exe 16->37         started        signatures6 process7 dnsIp8 57 mail.mcltransindo.com 103.204.130.176, 49709, 49712, 587 TOMATOWEB-BDTomatoWebPvtLimitedBD Bangladesh 18->57 49 C:\Users\user\AppData\Roaming\...\boqXv.exe, PE32 18->49 dropped 67 Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc) 18->67 69 Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines) 18->69 71 Tries to steal Mail credentials (via file / registry access) 18->71 39 conhost.exe 23->39         started        41 WmiPrvSE.exe 23->41         started        43 conhost.exe 25->43         started        45 conhost.exe 27->45         started        73 Tries to harvest and steal browser information (history, passwords, etc) 29->73 75 Hides that the sample has been downloaded from the Internet (zone.identifier) 29->75 47 conhost.exe 31->47         started        file9 signatures10 process11
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/99a1c20b08ce68a8b787a7234d5421a4c7e1f1607de03c91ee346e93373a4041
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/99a1c20b08ce68a8b787a7234d5421a4c7e1f1607de03c91ee346e93373a4041/
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2024-03-05 16:26:09 UTC
File Type:
PE (.Net Exe)
Extracted files:
7
AV detection:
16 of 24 (66.67%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=tgq4ecyizzukrn4hu4ru2vbbutd6d4lapxqdzepogrxjgnz2ibaq._file
Verdict:
malicious
Label(s):
agenttesla_v4
Create hunting rule
agenttesla
Create hunting rule
Similar samples:
11d7212106c1e7d65ca5b3a3d6c197775e224c151b89900de265e6efcbb68322
AgentTesla
6b1dda532678c811db3b3bc66788bdd3dbcfb260dc9dcea2a1cdb17bbc0b40c5
AgentTesla
a5c4d15614f27654b3e585bea87310c219fc733a82a59e1cba36be9579bda841
AgentTesla
b224c93b27774068d0c1a5e0ba7e744ff382c96ef02b2626fd434d1686f35e3a
AgentTesla
+ 102 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/240306-ksqebsgf67/
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
Checks computer location settings
AgentTesla
Unpacked files
SH256 hash:
e01ed8c2ea7f9825ab49a7109a1a264b581a59dbb41e2e6fb8345ebaf138e3ae
MD5 hash:
b058bbbda935c3e6aa52fd75556da50c
SHA1 hash:
ecfcc9b7b6f3f03d7e45c430cf63162b1513aeda
Link:
https://www.unpac.me/results/1c4e16be-702f-43bd-8770-57140f86de23/
SH256 hash:
c10c9b0882bac6f788f48b4dabe3291b14e639e650f2b9fcb0bc174ac92ae02b
MD5 hash:
7c7fb6daa78beb69128991ff893143ed
SHA1 hash:
c01bb99984b12b84129db80eae1d5d8341a358e2
Link:
https://www.unpac.me/results/1c4e16be-702f-43bd-8770-57140f86de23/
SH256 hash:
545f0d58963bae734eda50742cf9f78db188b868b1cd68e37f5bba2bc2c34fbb
MD5 hash:
1bfd87e0f9634e85d97ab3e12280762a
SHA1 hash:
ba3819ab61fc2ba2d0d79ebe31ffea46218fdd61
Link:
https://www.unpac.me/results/1c4e16be-702f-43bd-8770-57140f86de23/
SH256 hash:
2b786f191c682f38d2b221cd005f4db6f6a931e59b4044e8ce671b6175ab85b9
MD5 hash:
3aea00debb956c984818331d964ebe51
SHA1 hash:
85f420f46659b5dc25a2a72b76bb9f158f18c627
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/1c4e16be-702f-43bd-8770-57140f86de23/
Parent samples :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 hash:
99a1c20b08ce68a8b787a7234d5421a4c7e1f1607de03c91ee346e93373a4041
MD5 hash:
ad1b5eb8ac04a99c743e615b81bbab9e
SHA1 hash:
9b28273832a99430c0a6ce222ab0b70405db326c
Detections:
INDICATOR_KB_CERT_7c1118cbbadc95da3752c46e47a27438
Create hunting rule
Link:
https://www.unpac.me/results/1c4e16be-702f-43bd-8770-57140f86de23/
Malware family:
AgentTesla
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/99a1c20b08ce/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/99a1c20b08ce68a8b787a7234d5421a4c7e1f1607de03c91ee346e93373a4041

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_KB_CERT_7c1118cbbadc95da3752c46e47a27438
Create hunting rule
Author:ditekSHen
Description:Detects executables signed with stolen, revoked or invalid certificates
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: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_Digital_Certificate
Create hunting rule
Author:albertzsigovits
Rule name:pe_imphash
Create hunting rule
Rule name:PE_Potentially_Signed_Digital_Certificate
Create hunting rule
Author:albertzsigovits
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

Executable exe 99a1c20b08ce68a8b787a7234d5421a4c7e1f1607de03c91ee346e93373a4041

(this sample)

  
Delivery method
Distributed via e-mail attachment

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