MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 a4b39d55ec99198ecb996b335bbc980e86578a66a27263875f7b4cb072bfaeb2. 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: 10


Intelligence 10 IOCs YARA 6 File information Comments

SHA256 hash: a4b39d55ec99198ecb996b335bbc980e86578a66a27263875f7b4cb072bfaeb2
SHA3-384 hash: 55231b9f32fedff4019ced3d97f67026ebd8853628bb0b4af419b2c6d29bec8463fd5bad6d5688d1f787174a93714486
SHA1 hash: e2b7da28ef1dfcc2d1866556e22e6350ca84e54d
MD5 hash: 14ff88de9a90eb9a52be920456093338
humanhash: eleven-lithium-arkansas-arkansas
File name:quote #2063 almaco.exe
Download: download sample
Signature AgentTesla
File size:915'456 bytes
First seen:2021-06-21 04:57:55 UTC
Last seen:2021-06-21 13:26:13 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'666 x AgentTesla, 19'479 x Formbook, 12'209 x SnakeKeylogger)
ssdeep 12288:u3Ejpbimrp1E/X1q+WW7bfqTxQT7hzdfscN3fA4z7Q4EPGXnkjyZjVOZyGvJemmK:tBiWE90Wff8QfdmcJf+TVKAB
Threatray 5'970 similar samples on MalwareBazaar
TLSH 84156B9C3551B89EC5A3DE72CDA42C54AA217C76131BC20B91673A9C9E3DB86DF002F7
Reporter GovCERT_CH
Tags:AgentTesla exe

Intelligence


File Origin
# of uploads :
2
# of downloads :
90
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
quote #2063 almaco.exe
Verdict:
Malicious activity
Analysis date:
2021-06-21 05:01:10 UTC
Tags:
keylogger stealer agenttesla

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
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.
Result
Threat name:
AgentTesla
Detection:
malicious
Classification:
troj.adwa.evad
Score:
100 / 100
Signature
.NET source code contains very large array initializations
.NET source code references suspicious native API functions
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
Modifies the hosts file
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Queries sensitive BIOS Information (via WMI, Win32_Bios & Win32_BaseBoard, often done to detect virtual machines)
Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines)
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
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:
behaviorgraph top1 signatures2 2 Behavior Graph ID: 437462 Sample: quote #2063 almaco.exe Startdate: 21/06/2021 Architecture: WINDOWS Score: 100 47 Found malware configuration 2->47 49 Multi AV Scanner detection for dropped file 2->49 51 Multi AV Scanner detection for submitted file 2->51 53 9 other signatures 2->53 7 quote #2063 almaco.exe 6 2->7         started        11 NewApp.exe 2 2->11         started        13 NewApp.exe 1 2->13         started        process3 file4 29 C:\Users\user\AppData\...\CCYauvBwzt.exe, PE32 7->29 dropped 31 C:\Users\user\AppData\Local\...\tmp79C0.tmp, XML 7->31 dropped 33 C:\Users\user\...\quote #2063 almaco.exe.log, ASCII 7->33 dropped 55 Writes to foreign memory regions 7->55 57 Injects a PE file into a foreign processes 7->57 15 MSBuild.exe 2 4 7->15         started        19 MSBuild.exe 7->19         started        21 schtasks.exe 1 7->21         started        23 conhost.exe 11->23         started        25 conhost.exe 13->25         started        signatures5 process6 file7 35 C:\Users\user\AppData\Roaming\...35ewApp.exe, PE32 15->35 dropped 37 C:\Windows\System32\drivers\etc\hosts, ASCII 15->37 dropped 39 Modifies the hosts file 15->39 41 Hides that the sample has been downloaded from the Internet (zone.identifier) 15->41 43 Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines) 19->43 45 Queries sensitive BIOS Information (via WMI, Win32_Bios & Win32_BaseBoard, often done to detect virtual machines) 19->45 27 conhost.exe 21->27         started        signatures8 process9
Threat name:
ByteCode-MSIL.Trojan.Strictor
Status:
Malicious
First seen:
2021-06-21 00:43:58 UTC
AV detection:
11 of 46 (23.91%)
Threat level:
  5/5
Result
Malware family:
agenttesla
Score:
  10/10
Tags:
family:agenttesla keylogger persistence spyware stealer trojan
Behaviour
Creates scheduled task(s)
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Suspicious use of SetThreadContext
Adds Run key to start application
Drops file in Drivers directory
AgentTesla Payload
AgentTesla
Unpacked files
SH256 hash:
6bf0bd551b90ad0a6322676f478c6db9096f5e3ca92d3e6c76835fd8cc5fc953
MD5 hash:
6c0c86c0bf3dbbe458683b1ea4968055
SHA1 hash:
adc513b574226ad30bfab9a83e9bebe1b1295cd2
SH256 hash:
5bede9eedf6ae6df5a9d587c116c9583b31474c159c2b53486b000093cb3fde6
MD5 hash:
072eeac61b35d3f09edee4ff4f80f52d
SHA1 hash:
696fd9905a47e526470c2e234fef32f1ec1b74ad
SH256 hash:
54cb1c9772a1d743fd37a0495f63bb731bb593a85ab5ef35f983e06c81c9c704
MD5 hash:
f87a95ea97e4901fe03edebd2ccad18c
SHA1 hash:
5532d1ac7fd5a83767f15d18d7066f9d26b06474
SH256 hash:
a4b39d55ec99198ecb996b335bbc980e86578a66a27263875f7b4cb072bfaeb2
MD5 hash:
14ff88de9a90eb9a52be920456093338
SHA1 hash:
e2b7da28ef1dfcc2d1866556e22e6350ca84e54d
Please note that we are no longer able to provide a coverage score for Virus Total.

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:ach_AgentTesla_20200929
Author:abuse.ch
Description:Detects AgentTesla PE
Rule name:MALWARE_Win_AgentTeslaV3
Author:ditekSHen
Description:AgentTeslaV3 infostealer payload
Rule name:pe_imphash
Rule name:Skystars_Malware_Imphash
Author:Skystars LightDefender
Description:imphash
Rule name:win_agent_tesla_v1
Author:Johannes Bader @viql
Description:detects Agent Tesla

File information


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

Malspam

AgentTesla

Executable exe a4b39d55ec99198ecb996b335bbc980e86578a66a27263875f7b4cb072bfaeb2

(this sample)

  
Delivery method
Distributed via e-mail attachment

Comments