agenttesla | bddee346a47d5cfbc48964020142db3cc659930094f46f8d63c072422499c7ed

General

Target

PO.2402986.PDF.exe
Size

1.3MB
MD5

6ac943b332528abd3402c0954145bf05
SHA1

8a17715627e7017d2b45c09f4c978917880e2876
SHA256

bddee346a47d5cfbc48964020142db3cc659930094f46f8d63c072422499c7ed
SHA512

69fd5ffb81c100caab99b7b4e02de092666d4b591248ca6b604b3aedd9405c9a94d6167a9c22bddb82e036bd991ae0da4115fd9337604c6e8aac94a65a928fb7
SSDEEP

24576:pE6VLynkgY8Lsz9JfAH4sx+dV8Iz7wMFaael:pEVY8We4ZeGfel

Score

10^/10

agenttesla collection evasion keylogger persistence spyware stealer trojan

Malware Config

Extracted

Family

agenttesla

C2

https://api.telegram.org/bot1952154144:AAEHUKomldKQIyjgq_MWw4YWiGcA_iwz6T4/sendDocument

Signatures

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

AgentTesla payload 1 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1840-135-0x0000000000400000-0x000000000043C000-memory.dmp	family_agenttesla

Looks for VirtualBox Guest Additions in registry 2 TTPs 1 IoCs
evasion

Query Registry
T1012

Virtualization/Sandbox Evasion
T1497

Processes:

PO.2402986.PDF.exe

description ioc process

Key opened \REGISTRY\MACHINE\SOFTWARE\Oracle\VirtualBox Guest Additions PO.2402986.PDF.exe
Looks for VMWare Tools registry key 2 TTPs 1 IoCs
evasion

Query Registry
T1012

Virtualization/Sandbox Evasion
T1497

Processes:

PO.2402986.PDF.exe

description ioc process

Key opened \REGISTRY\MACHINE\SOFTWARE\VMware, Inc.\VMware Tools PO.2402986.PDF.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SOFTWARE\Oracle\VirtualBox Guest Additions	PO.2402986.PDF.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SOFTWARE\VMware, Inc.\VMware Tools	PO.2402986.PDF.exe

Checks BIOS information in registry 2 TTPs 2 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

Processes:

PO.2402986.PDF.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	PO.2402986.PDF.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	PO.2402986.PDF.exe

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

Processes:

AddInProcess32.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AddInProcess32.exe
Key opened	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AddInProcess32.exe
Key opened	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AddInProcess32.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

AddInProcess32.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kmk = "C:\\Users\\Admin\\AppData\\Roaming\\kmk\\kmk.exe"	AddInProcess32.exe

Maps connected drives based on registry 3 TTPs 2 IoCs

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

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

Processes:

PO.2402986.PDF.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	PO.2402986.PDF.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\0	PO.2402986.PDF.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

PO.2402986.PDF.exe

description pid process target process

PID 3756 set thread context of 1840 3756 PO.2402986.PDF.exe AddInProcess32.exe
Suspicious behavior: EnumeratesProcesses 6 IoCs

Processes:

PO.2402986.PDF.exeAddInProcess32.exe

pid process

3756 PO.2402986.PDF.exe
3756 PO.2402986.PDF.exe
3756 PO.2402986.PDF.exe
3756 PO.2402986.PDF.exe
1840 AddInProcess32.exe
1840 AddInProcess32.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

PO.2402986.PDF.exeAddInProcess32.exe

description pid process

Token: SeDebugPrivilege 3756 PO.2402986.PDF.exe
Token: SeDebugPrivilege 1840 AddInProcess32.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

AddInProcess32.exe

pid process

1840 AddInProcess32.exe

description	pid	process	target process
PID 3756 set thread context of 1840	3756	PO.2402986.PDF.exe	AddInProcess32.exe

pid	process
3756	PO.2402986.PDF.exe
3756	PO.2402986.PDF.exe
3756	PO.2402986.PDF.exe
3756	PO.2402986.PDF.exe
1840	AddInProcess32.exe
1840	AddInProcess32.exe

description	pid	process
Token: SeDebugPrivilege	3756	PO.2402986.PDF.exe
Token: SeDebugPrivilege	1840	AddInProcess32.exe

pid	process
1840	AddInProcess32.exe

Suspicious use of WriteProcessMemory 12 IoCs

Processes:

PO.2402986.PDF.exe

description	pid	process	target process
PID 3756 wrote to memory of 1860	3756	PO.2402986.PDF.exe	RegAsm.exe
PID 3756 wrote to memory of 1860	3756	PO.2402986.PDF.exe	RegAsm.exe
PID 3756 wrote to memory of 4256	3756	PO.2402986.PDF.exe	aspnet_wp.exe
PID 3756 wrote to memory of 4256	3756	PO.2402986.PDF.exe	aspnet_wp.exe
PID 3756 wrote to memory of 1840	3756	PO.2402986.PDF.exe	AddInProcess32.exe
PID 3756 wrote to memory of 1840	3756	PO.2402986.PDF.exe	AddInProcess32.exe
PID 3756 wrote to memory of 1840	3756	PO.2402986.PDF.exe	AddInProcess32.exe
PID 3756 wrote to memory of 1840	3756	PO.2402986.PDF.exe	AddInProcess32.exe
PID 3756 wrote to memory of 1840	3756	PO.2402986.PDF.exe	AddInProcess32.exe
PID 3756 wrote to memory of 1840	3756	PO.2402986.PDF.exe	AddInProcess32.exe
PID 3756 wrote to memory of 1840	3756	PO.2402986.PDF.exe	AddInProcess32.exe
PID 3756 wrote to memory of 1840	3756	PO.2402986.PDF.exe	AddInProcess32.exe

outlook_office_path 1 IoCs

Processes:

AddInProcess32.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AddInProcess32.exe

outlook_win_path 1 IoCs

Processes:

AddInProcess32.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AddInProcess32.exe

C:\Users\Admin\AppData\Local\Temp\PO.2402986.PDF.exe
"C:\Users\Admin\AppData\Local\Temp\PO.2402986.PDF.exe"
1⤵
- Looks for VirtualBox Guest Additions in registry
- Looks for VMWare Tools registry key
- Checks BIOS information in registry
- Maps connected drives based on registry
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3756

C:\Windows\Microsoft.NET\Framework64\v4.0.30319\RegAsm.exe
"C:\Windows\Microsoft.NET\Framework64\v4.0.30319\RegAsm.exe"
2⤵
PID:1860

C:\Windows\Microsoft.NET\Framework64\v4.0.30319\aspnet_wp.exe
"C:\Windows\Microsoft.NET\Framework64\v4.0.30319\aspnet_wp.exe"
2⤵
PID:4256

C:\Windows\Microsoft.NET\Framework64\v4.0.30319\AddInProcess32.exe
"C:\Windows\Microsoft.NET\Framework64\v4.0.30319\AddInProcess32.exe"
2⤵
- Accesses Microsoft Outlook profiles
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- outlook_office_path
- outlook_win_path
PID:1840

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Virtualization/Sandbox Evasion

2

T1497

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

4

T1012

Virtualization/Sandbox Evasion

2

T1497

System Information Discovery

2

T1082

Peripheral Device Discovery

1

T1120

Lateral Movement

Collection

Email Collection

1

T1114

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

memory/1840-135-0x0000000000400000-0x000000000043C000-memory.dmp

Filesize
240KB

Download
memory/1840-137-0x0000000005CC0000-0x0000000006264000-memory.dmp

Filesize
5.6MB

Download
memory/1840-138-0x0000000005710000-0x00000000057A2000-memory.dmp

Filesize
584KB

Download
memory/1840-139-0x0000000005850000-0x00000000058EC000-memory.dmp

Filesize
624KB

Download
memory/1840-140-0x0000000005930000-0x0000000005940000-memory.dmp

Filesize
64KB

Download
memory/1840-141-0x0000000006520000-0x0000000006586000-memory.dmp

Filesize
408KB

Download
memory/1840-142-0x0000000005930000-0x0000000005940000-memory.dmp

Filesize
64KB

Download
memory/1840-144-0x0000000006790000-0x00000000067E0000-memory.dmp

Filesize
320KB

Download
memory/1840-145-0x00000000064F0000-0x00000000064FA000-memory.dmp

Filesize
40KB

Download
memory/3756-133-0x000001B0D8340000-0x000001B0D8488000-memory.dmp

Filesize
1.3MB

Download
memory/3756-134-0x000001B0F3B20000-0x000001B0F3B30000-memory.dmp

Filesize
64KB

Download

Resubmissions

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

Replay Monitor

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Downloads