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 Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Web Service

Credential Access

Discovery

Query Registry

System Information Discovery

Lateral Movement

Collection

Email Collection

Command and Control

Web Service

Exfiltration

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