agenttesla | 8a7bb1898f3f00615aaabfb2e731670588ff0be3b0ab11889e27a1d9f36d3315

Analysis

max time kernel
147s
max time network
112s
platform
windows10_x64
resource
win10v200722
submitted
03/09/2020, 10:50

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General

Target
Resume.exe
Size 608KB
Sample200903-5t6ca1a5ke
SHA256 8a7bb1898f3f00615aaabfb2e731670588ff0be3b0ab11889e27a1d9f36d3315
MD5 975c5a67d882bc2aaf0179cd92ea6869
SHA1 af59de0b698c0539a962bd6495fdfdaf18661149
SHA512 26402844ac557aef7fa908c6c25391930c5dcd2761b1634651acdce499716a06919ccef8c7e84f9fa78a5047686fbb666ee959602c418dc0fc579c620a747a70
MD5 SHA1 SHA512

Score

10^/10

keylogger stealer persistence spyware trojan agenttesla

Malware Config

Extracted

Credentials

Protocol
smtp
Host
smtp.bnb-spa.com
Port
587
Username
[email protected]
Password
}iPxp@l#21aE

Signatures

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

AgentTesla Payload 3 IoCs

keylogger stealer

resource	yara_rule
behavioral2/memory/3124-15-0x0000000000400000-0x0000000000452000-memory.dmp	agent_tesla
behavioral2/memory/3124-15-0x0000000000400000-0x0000000000452000-memory.dmp	agent_tesla
behavioral2/memory/3124-16-0x000000000044C0CE-mapping.dmp	agent_tesla

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

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-1-5-21-1400429095-533421673-2598934218-1000\Software\Microsoft\Windows\CurrentVersion\Run\Mymp4 = "C:\\Users\\Admin\\AppData\\Roaming\\Mymp4\\Mymp4.exe"	Resume.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3980 set thread context of 3124	3980	Resume.exe	77

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\ServiceProfiles\LocalService\winhttp\cachev3.dat	svchost.exe

Creates scheduled task(s) 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task

T1053

pid	Process
60	schtasks.exe

Modifies data under HKEY_USERS 5 IoCs

description	ioc	Process
Set value (data)	\REGISTRY\USER\S-1-5-19\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\0e-3e-6f-2c-c8-c7\WpadDecisionTime = 35408b40f081d601	svchost.exe
Set value (int)	\REGISTRY\USER\S-1-5-19\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\0e-3e-6f-2c-c8-c7\WpadDecision = "0"	svchost.exe
Key created	\REGISTRY\USER\S-1-5-19\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad	svchost.exe
Key created	\REGISTRY\USER\S-1-5-19\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\0e-3e-6f-2c-c8-c7	svchost.exe
Set value (int)	\REGISTRY\USER\S-1-5-19\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\0e-3e-6f-2c-c8-c7\WpadDecisionReason = "1"	svchost.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
3980	Resume.exe
3980	Resume.exe
3980	Resume.exe
3124	Resume.exe
3124	Resume.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeShutdownPrivilege	516	svchost.exe
Token: SeCreatePagefilePrivilege	516	svchost.exe
Token: SeDebugPrivilege	3980	Resume.exe
Token: SeDebugPrivilege	3124	Resume.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3124	Resume.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 3980 wrote to memory of 60	3980	Resume.exe	75
PID 3980 wrote to memory of 60	3980	Resume.exe	75
PID 3980 wrote to memory of 60	3980	Resume.exe	75
PID 3980 wrote to memory of 3124	3980	Resume.exe	77
PID 3980 wrote to memory of 3124	3980	Resume.exe	77
PID 3980 wrote to memory of 3124	3980	Resume.exe	77
PID 3980 wrote to memory of 3124	3980	Resume.exe	77
PID 3980 wrote to memory of 3124	3980	Resume.exe	77
PID 3980 wrote to memory of 3124	3980	Resume.exe	77
PID 3980 wrote to memory of 3124	3980	Resume.exe	77
PID 3980 wrote to memory of 3124	3980	Resume.exe	77

C:\Users\Admin\AppData\Local\Temp\Resume.exe
"C:\Users\Admin\AppData\Local\Temp\Resume.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3980
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\EdPCtjoFskwT" /XML "C:\Users\Admin\AppData\Local\Temp\tmp187.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:60
- C:\Users\Admin\AppData\Local\Temp\Resume.exe
  "{path}"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  PID:3124

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k LocalService -s WinHttpAutoProxySvc
1⤵
- Drops file in Windows directory
- Modifies data under HKEY_USERS
- Suspicious use of AdjustPrivilegeToken
PID:516

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Registry Run Keys / Startup Folder

T1060

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Modify Registry

T1112

Credential Access

Credentials in Files

T1081

Discovery

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

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Downloads

memory/3124-25-0x00000000061B0000-0x00000000061B1000-memory.dmp

Download

memory/3124-24-0x0000000005DD0000-0x0000000005DD1000-memory.dmp

Download

memory/3124-23-0x0000000005380000-0x0000000005381000-memory.dmp

Download

memory/3124-18-0x0000000073FB0000-0x000000007469E000-memory.dmp

Download

memory/3124-15-0x0000000000400000-0x0000000000452000-memory.dmp

Download

memory/3980-5-0x0000000004B90000-0x0000000004B91000-memory.dmp

Download

memory/3980-12-0x0000000008320000-0x0000000008399000-memory.dmp

Download

memory/3980-9-0x00000000083C0000-0x00000000083C1000-memory.dmp

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memory/3980-8-0x0000000008290000-0x0000000008311000-memory.dmp

Download

memory/3980-7-0x0000000007F00000-0x0000000007F01000-memory.dmp

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memory/3980-6-0x0000000004FA0000-0x0000000004FA3000-memory.dmp

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memory/3980-0-0x0000000073FB0000-0x000000007469E000-memory.dmp

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memory/3980-4-0x0000000004A00000-0x0000000004A01000-memory.dmp

Download

memory/3980-3-0x0000000004FC0000-0x0000000004FC1000-memory.dmp

Download

memory/3980-1-0x0000000000130000-0x0000000000131000-memory.dmp

Download