agenttesla | 6c77b74f73e42bf0e33a59ad800ef692d834ef272beff77e2c60919e6a0ccc4c | Triage

Analysis

max time kernel
150s
max time network
148s
platform
windows7_x64
resource
win7-20230220-en
resource tags

arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
submitted
01-04-2023 01:50

Sharing

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General

Target

5193149e55e9ed83fad3ad981ba16230771cc2d3a90ef1f9fba9d9f5b5b2519d.exe
Size

232KB
MD5

be1519bcbdb5a58fb2bb3ab5dd51ae1f
SHA1

ba25e963f2c56380d82188203aec956dd2c81a91
SHA256

5193149e55e9ed83fad3ad981ba16230771cc2d3a90ef1f9fba9d9f5b5b2519d
SHA512

efae646f8238a389e207f063e7f3ae8819caf151c72db290e08c8c0ef820d03dbd3d680861c510d4083f1cc3d3250d07d134768bac5c2d205a372f4fc0b3532f
SSDEEP

6144:+PX7iNebSdJ8DckdV+opbGA5Siwrd987k:5PYckdbGmSiwBH

Score

10^/10

agenttesla guloader collection discovery downloader keylogger spyware stealer trojan

Malware Config

Extracted

Family

agenttesla

C2

https://api.telegram.org/bot6090824543:AAGDjc8qY74kVvTCL6JGfHdJaauZXSH2oek/

Signatures

AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
keylogger trojan stealer spyware agenttesla
Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
downloader guloader

Checks QEMU agent file 2 TTPs 2 IoCs

Checks presence of QEMU agent, possibly to detect virtualization.

Query Registry

System Information Discovery

Processes:

caspol.exe5193149e55e9ed83fad3ad981ba16230771cc2d3a90ef1f9fba9d9f5b5b2519d.exe

description	ioc	process
File opened (read-only)	C:\Program Files\Qemu-ga\qemu-ga.exe	caspol.exe
File opened (read-only)	C:\Program Files\Qemu-ga\qemu-ga.exe	5193149e55e9ed83fad3ad981ba16230771cc2d3a90ef1f9fba9d9f5b5b2519d.exe

Loads dropped DLL 1 IoCs

Processes:

5193149e55e9ed83fad3ad981ba16230771cc2d3a90ef1f9fba9d9f5b5b2519d.exe

pid process

1676 5193149e55e9ed83fad3ad981ba16230771cc2d3a90ef1f9fba9d9f5b5b2519d.exe

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

Email Collection

Processes:

caspol.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-1283023626-844874658-3193756055-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	caspol.exe
Key opened	\REGISTRY\USER\S-1-5-21-1283023626-844874658-3193756055-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	caspol.exe
Key opened	\REGISTRY\USER\S-1-5-21-1283023626-844874658-3193756055-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	caspol.exe

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012
Legitimate hosting services abused for malware hosting/C2 1 TTPs

Web Service
T1102
Looks up external IP address via web service 2 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.

Processes:

flow ioc

10 api.ipify.org
11 api.ipify.org

Drops file in System32 directory 1 IoCs

Processes:

5193149e55e9ed83fad3ad981ba16230771cc2d3a90ef1f9fba9d9f5b5b2519d.exe

description	ioc	process
File opened for modification	C:\Windows\SysWOW64\Ichthyophagous213\Disentranced.Eff	5193149e55e9ed83fad3ad981ba16230771cc2d3a90ef1f9fba9d9f5b5b2519d.exe

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

Processes:

caspol.exe

pid process

1728 caspol.exe
Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

Processes:

5193149e55e9ed83fad3ad981ba16230771cc2d3a90ef1f9fba9d9f5b5b2519d.execaspol.exe

pid process

1676 5193149e55e9ed83fad3ad981ba16230771cc2d3a90ef1f9fba9d9f5b5b2519d.exe
1728 caspol.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

5193149e55e9ed83fad3ad981ba16230771cc2d3a90ef1f9fba9d9f5b5b2519d.exe

description	pid	process	target process
PID 1676 set thread context of 1728	1676	5193149e55e9ed83fad3ad981ba16230771cc2d3a90ef1f9fba9d9f5b5b2519d.exe	caspol.exe

Drops file in Windows directory 1 IoCs

Processes:

5193149e55e9ed83fad3ad981ba16230771cc2d3a90ef1f9fba9d9f5b5b2519d.exe

description	ioc	process
File opened for modification	C:\Windows\Fonts\Idioterne\Hyperrealize.ini	5193149e55e9ed83fad3ad981ba16230771cc2d3a90ef1f9fba9d9f5b5b2519d.exe

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

System Information Discovery
T1082

Suspicious behavior: MapViewOfSection 2 IoCs

Processes:

5193149e55e9ed83fad3ad981ba16230771cc2d3a90ef1f9fba9d9f5b5b2519d.exe

pid	process
1676	5193149e55e9ed83fad3ad981ba16230771cc2d3a90ef1f9fba9d9f5b5b2519d.exe
1676	5193149e55e9ed83fad3ad981ba16230771cc2d3a90ef1f9fba9d9f5b5b2519d.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

caspol.exe

description pid process

Token: SeDebugPrivilege 1728 caspol.exe

Suspicious use of WriteProcessMemory 9 IoCs

Processes:

5193149e55e9ed83fad3ad981ba16230771cc2d3a90ef1f9fba9d9f5b5b2519d.exe

description	pid	process	target process
PID 1676 wrote to memory of 1704	1676	5193149e55e9ed83fad3ad981ba16230771cc2d3a90ef1f9fba9d9f5b5b2519d.exe	caspol.exe
PID 1676 wrote to memory of 1704	1676	5193149e55e9ed83fad3ad981ba16230771cc2d3a90ef1f9fba9d9f5b5b2519d.exe	caspol.exe
PID 1676 wrote to memory of 1704	1676	5193149e55e9ed83fad3ad981ba16230771cc2d3a90ef1f9fba9d9f5b5b2519d.exe	caspol.exe
PID 1676 wrote to memory of 1704	1676	5193149e55e9ed83fad3ad981ba16230771cc2d3a90ef1f9fba9d9f5b5b2519d.exe	caspol.exe
PID 1676 wrote to memory of 1728	1676	5193149e55e9ed83fad3ad981ba16230771cc2d3a90ef1f9fba9d9f5b5b2519d.exe	caspol.exe
PID 1676 wrote to memory of 1728	1676	5193149e55e9ed83fad3ad981ba16230771cc2d3a90ef1f9fba9d9f5b5b2519d.exe	caspol.exe
PID 1676 wrote to memory of 1728	1676	5193149e55e9ed83fad3ad981ba16230771cc2d3a90ef1f9fba9d9f5b5b2519d.exe	caspol.exe
PID 1676 wrote to memory of 1728	1676	5193149e55e9ed83fad3ad981ba16230771cc2d3a90ef1f9fba9d9f5b5b2519d.exe	caspol.exe
PID 1676 wrote to memory of 1728	1676	5193149e55e9ed83fad3ad981ba16230771cc2d3a90ef1f9fba9d9f5b5b2519d.exe	caspol.exe

outlook_office_path 1 IoCs

Processes:

caspol.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-1283023626-844874658-3193756055-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	caspol.exe

outlook_win_path 1 IoCs

Processes:

caspol.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-1283023626-844874658-3193756055-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	caspol.exe

C:\Users\Admin\AppData\Local\Temp\5193149e55e9ed83fad3ad981ba16230771cc2d3a90ef1f9fba9d9f5b5b2519d.exe
"C:\Users\Admin\AppData\Local\Temp\5193149e55e9ed83fad3ad981ba16230771cc2d3a90ef1f9fba9d9f5b5b2519d.exe"
1⤵
- Checks QEMU agent file
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Drops file in Windows directory
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:1676

C:\Windows\Microsoft.NET\Framework\v4.0.30319\caspol.exe
"C:\Users\Admin\AppData\Local\Temp\5193149e55e9ed83fad3ad981ba16230771cc2d3a90ef1f9fba9d9f5b5b2519d.exe"
2⤵
PID:1704

C:\Windows\Microsoft.NET\Framework\v4.0.30319\caspol.exe
"C:\Users\Admin\AppData\Local\Temp\5193149e55e9ed83fad3ad981ba16230771cc2d3a90ef1f9fba9d9f5b5b2519d.exe"
2⤵
- Checks QEMU agent file
- Accesses Microsoft Outlook profiles
- Suspicious use of NtCreateThreadExHideFromDebugger
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of AdjustPrivilegeToken
- outlook_office_path
- outlook_win_path
PID:1728

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

System Information Discovery

Lateral Movement

Collection

Email Collection

Exfiltration

Command and Control

Web Service

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\CabF598.tmp
Filesize
61KB

MD5
fc4666cbca561e864e7fdf883a9e6661

SHA1
2f8d6094c7a34bf12ea0bbf0d51ee9c5bb7939a5

SHA256
10f3deb6c452d749a7451b5d065f4c0449737e5ee8a44f4d15844b503141e65b

SHA512
c71f54b571e01f247f072be4bbebdf5d8410b67eb79a61e7e0d9853fe857ab9bd12f53e6af3394b935560178107291fc4be351b27deb388eba90ba949633d57d

Download Submit
\Users\Admin\AppData\Local\Temp\nsd5DD.tmp\System.dll
Filesize
11KB

MD5
34442e1e0c2870341df55e1b7b3cccdc

SHA1
99b2fa21aead4b6ccd8ff2f6d3d3453a51d9c70c

SHA256
269d232712c86983336badb40b9e55e80052d8389ed095ebf9214964d43b6bb1

SHA512
4a8c57fb12997438b488b862f3fc9dc0f236e07bb47b2bce6053dcb03ac7ad171842f02ac749f02dda4719c681d186330524cd2953d33cb50854844e74b33d51

Download Submit
memory/1676-62-0x00000000037E0000-0x00000000045D5000-memory.dmp

Filesize
14.0MB

Download
memory/1676-63-0x00000000037E0000-0x00000000045D5000-memory.dmp

Filesize
14.0MB

Download
memory/1728-64-0x0000000000F60000-0x0000000001D55000-memory.dmp

Filesize
14.0MB

Download
memory/1728-65-0x0000000000400000-0x0000000000615000-memory.dmp

Filesize
2.1MB

Download
memory/1728-87-0x0000000000400000-0x0000000000615000-memory.dmp

Filesize
2.1MB

Download
memory/1728-88-0x0000000000F60000-0x0000000001D55000-memory.dmp

Filesize
14.0MB

Download
memory/1728-89-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/1728-90-0x0000000000F60000-0x0000000001D55000-memory.dmp

Filesize
14.0MB

Download
memory/1728-91-0x00000000002E0000-0x0000000000320000-memory.dmp

Filesize
256KB

Download
memory/1728-113-0x00000000002E0000-0x0000000000320000-memory.dmp

Filesize
256KB

Download