agenttesla | 9d24e8126703ce8965912d84f1551d49a66bb45bdb593c3a45185d67fa76d9cd

Analysis

max time kernel
86s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20220331-en
submitted
13/04/2022, 12:12

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General

Target
ACS 0067533 INV0093.xlsx.exe
Size 447KB
Sample220413-pc573acaa6
SHA256 9d24e8126703ce8965912d84f1551d49a66bb45bdb593c3a45185d67fa76d9cd
MD5 6ca7586acb0a65a48e32b4ab1add0e8f
SHA1 779eb42ba756afadbb411549130ce12f8da09ec4
SHA512 2985322cd1797442fe2f3b32f5c1c197e45605eca4a6218c010cfddd06d32fb64d2cdc09faa6c807fbe019eac226d14f64c732f211fb77d6a92a1524cacd658f
MD5 SHA1 SHA512

Score

10^/10

agenttesla collection keylogger persistence spyware stealer trojan

Malware Config

Signatures

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

Executes dropped EXE 2 IoCs

pid	Process
3904	yzxgn.exe
4132	yzxgn.exe

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

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 stealer

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 stealer

Data from Local System
T1005

Credentials in Files
T1081

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1082102374-1487407228-1886994731-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	yzxgn.exe
Key opened	\REGISTRY\USER\S-1-5-21-1082102374-1487407228-1886994731-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	yzxgn.exe
Key opened	\REGISTRY\USER\S-1-5-21-1082102374-1487407228-1886994731-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	yzxgn.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1082102374-1487407228-1886994731-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\WindowsUpdate = "C:\\Users\\Admin\\AppData\\Roaming\\WindowsUpdate\\WindowsUpdate.exe"	yzxgn.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3904 set thread context of 4132	3904	yzxgn.exe	84

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4132	yzxgn.exe
4132	yzxgn.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4132	yzxgn.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 4164 wrote to memory of 3904	4164	ACS 0067533 INV0093.xlsx.exe	82
PID 4164 wrote to memory of 3904	4164	ACS 0067533 INV0093.xlsx.exe	82
PID 4164 wrote to memory of 3904	4164	ACS 0067533 INV0093.xlsx.exe	82
PID 3904 wrote to memory of 4132	3904	yzxgn.exe	84
PID 3904 wrote to memory of 4132	3904	yzxgn.exe	84
PID 3904 wrote to memory of 4132	3904	yzxgn.exe	84
PID 3904 wrote to memory of 4132	3904	yzxgn.exe	84
PID 3904 wrote to memory of 4132	3904	yzxgn.exe	84
PID 3904 wrote to memory of 4132	3904	yzxgn.exe	84
PID 3904 wrote to memory of 4132	3904	yzxgn.exe	84
PID 3904 wrote to memory of 4132	3904	yzxgn.exe	84
PID 3904 wrote to memory of 4132	3904	yzxgn.exe	84
PID 3904 wrote to memory of 4132	3904	yzxgn.exe	84

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1082102374-1487407228-1886994731-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	yzxgn.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1082102374-1487407228-1886994731-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	yzxgn.exe

C:\Users\Admin\AppData\Local\Temp\ACS 0067533 INV0093.xlsx.exe
"C:\Users\Admin\AppData\Local\Temp\ACS 0067533 INV0093.xlsx.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:4164
- C:\Users\Admin\AppData\Local\Temp\yzxgn.exe
  C:\Users\Admin\AppData\Local\Temp\yzxgn.exe C:\Users\Admin\AppData\Local\Temp\tqxancvie
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - Suspicious use of WriteProcessMemory
  PID:3904
- - C:\Users\Admin\AppData\Local\Temp\yzxgn.exe
    C:\Users\Admin\AppData\Local\Temp\yzxgn.exe C:\Users\Admin\AppData\Local\Temp\tqxancvie
    3⤵
    - Executes dropped EXE
    - Accesses Microsoft Outlook profiles
    - Adds Run key to start application
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - outlook_office_path
    - outlook_win_path
    PID:4132

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

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Email Collection

T1114

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

nhw5qk2kfuxvceril28h

Path C:\Users\Admin\AppData\Local\Temp\nhw5qk2kfuxvceril28h
Size 278KB
SHA256 cded19afa094a2500c782bd383f51ed0132205aba50826857f964098ed870ac7
MD5 9bdf3cb6d65b1d71df7e576af1cce48c
SHA1 40a6f961dfb4f22844f796d7fe8408fcca6efab6
SHA512 b75ac2661852a7e1226631a0e1eab40e974ae28341f46d7646c3333f50492aa9d6a9644c9af08d08aada21d702cd697b234b0fb7156258e55fa2060991f2f288
SSDEEP 6144:hAIPPHFpD1ni3LXwm8XMlk9L/lobDF1n55P1sg4zowesMfVZ:hjHHF637l88lkNe55P1sg4zFesMfVZ
MD5 SHA1 SHA512 SSDEEP

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tqxancvie

Path C:\Users\Admin\AppData\Local\Temp\tqxancvie
Size 4KB
SHA256 ecd9afbd05e0bdb8b35ac9d5a872d0d7c65c074eba9acedb636dee93f60b958b
MD5 78c3a281262056c7ab039a75868aabae
SHA1 1d719edcbe83d34d0408fafbe2ab8378039dea71
SHA512 cb225d4f44c9b545e58185c372c8cf317ad7d6c0040de0c24b9bcf543c544f21c96476e33febc5535c0b347e5183c7e4a6a62f20bb0795f1efe64ac997d49f1c
SSDEEP 96:pcHZj4rxXF7JI0CW1oM/SVN7jjSlkDdfeaTG+o5aFGYlhM44FwJRTMKUlMbk3mTu:pcxsxXFiXW3/+IGDFef+g2GYlhwuRAK8
MD5 SHA1 SHA512 SSDEEP

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yzxgn.exe

Path C:\Users\Admin\AppData\Local\Temp\yzxgn.exe
Size 70KB
SHA256 4fd9867e74444269d663ef90b460dd1d7b37493999d0f41b9c416c9f79eb6cc3
MD5 59e5ed022640fa0c4d4cd0e8f5931e0d
SHA1 b44876ef756208ec4f5588fd2b94b4c9b255273c
SHA512 fd4ca1806f0db44f3cdb37b5fa3b31ea74edd1cfa6a4f2f78e171969c0e05fe5cc5e7bc6e7dbed815d68369ff5298b939de6141113cddc707bf88d5802efa9b1
SSDEEP 768:hsXofa78om6P8yMW/b/EG8a7K3u/yB0loFi3nzNKtc8WjWsWjcdIUeoUBpVMgu:aS6P8HIbqawAysnwc8DsWjcdIUEgg
MD5 SHA1 SHA512 SSDEEP

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yzxgn.exe

Path C:\Users\Admin\AppData\Local\Temp\yzxgn.exe
Size 70KB
SHA256 4fd9867e74444269d663ef90b460dd1d7b37493999d0f41b9c416c9f79eb6cc3
MD5 59e5ed022640fa0c4d4cd0e8f5931e0d
SHA1 b44876ef756208ec4f5588fd2b94b4c9b255273c
SHA512 fd4ca1806f0db44f3cdb37b5fa3b31ea74edd1cfa6a4f2f78e171969c0e05fe5cc5e7bc6e7dbed815d68369ff5298b939de6141113cddc707bf88d5802efa9b1
SSDEEP 768:hsXofa78om6P8yMW/b/EG8a7K3u/yB0loFi3nzNKtc8WjWsWjcdIUeoUBpVMgu:aS6P8HIbqawAysnwc8DsWjcdIUEgg
MD5 SHA1 SHA512 SSDEEP

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yzxgn.exe

Path C:\Users\Admin\AppData\Local\Temp\yzxgn.exe
Size 70KB
SHA256 4fd9867e74444269d663ef90b460dd1d7b37493999d0f41b9c416c9f79eb6cc3
MD5 59e5ed022640fa0c4d4cd0e8f5931e0d
SHA1 b44876ef756208ec4f5588fd2b94b4c9b255273c
SHA512 fd4ca1806f0db44f3cdb37b5fa3b31ea74edd1cfa6a4f2f78e171969c0e05fe5cc5e7bc6e7dbed815d68369ff5298b939de6141113cddc707bf88d5802efa9b1
SSDEEP 768:hsXofa78om6P8yMW/b/EG8a7K3u/yB0loFi3nzNKtc8WjWsWjcdIUeoUBpVMgu:aS6P8HIbqawAysnwc8DsWjcdIUEgg
MD5 SHA1 SHA512 SSDEEP

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memory/4132-132-0x0000000000400000-0x000000000044A000-memory.dmp

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memory/4132-130-0x0000000000400000-0x000000000044A000-memory.dmp

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memory/4132-133-0x0000000000400000-0x000000000044A000-memory.dmp

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memory/4132-134-0x0000000005DC0000-0x0000000006364000-memory.dmp

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memory/4132-135-0x00000000058B0000-0x000000000594C000-memory.dmp

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memory/4132-136-0x0000000006810000-0x0000000006876000-memory.dmp

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memory/4132-137-0x0000000006C60000-0x0000000006CB0000-memory.dmp

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memory/4132-138-0x0000000006E60000-0x0000000006EF2000-memory.dmp

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memory/4132-139-0x0000000006BD0000-0x0000000006BDA000-memory.dmp

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