agenttesla | 0096dc44d88cb2dc617a69d3b9fef566a848c661f00bee5a85afcb205a33aba9

General

Target

Signed PO.exe
Size

688KB
MD5

35427a284ae978c86b7eba2738564545
SHA1

6b1156236111f3af9754bfea4e61afb42be7d59f
SHA256

0096dc44d88cb2dc617a69d3b9fef566a848c661f00bee5a85afcb205a33aba9
SHA512

d8e02ab6b6e513de4225bbb0211a1a04957760bc409a0fd6cc94a1297242d1625e81fcbbc23c1feceba481f6380ca15de77891f2b7bbd903fb53fe70093b3435

Score

10^/10

agenttesla evasion keylogger spyware stealer trojan

Malware Config

Extracted

Family

agenttesla

Credentials

Protocol: smtp
Host:
smtp.shirdilog.com
Port:
587
Username:
cs.maa@shirdilog.com
Password:
SL094521

Signatures

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

AgentTesla Payload 4 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1208-7-0x0000000000400000-0x0000000000466000-memory.dmp	family_agenttesla
behavioral1/memory/1208-8-0x00000000004612BE-mapping.dmp	family_agenttesla
behavioral1/memory/1208-9-0x0000000000400000-0x0000000000466000-memory.dmp	family_agenttesla
behavioral1/memory/1208-10-0x0000000000400000-0x0000000000466000-memory.dmp	family_agenttesla

Looks for VirtualBox Guest Additions in registry 2 TTPs
evasion

Query Registry
T1012

Virtualization/Sandbox Evasion
T1497
Looks for VMWare Tools registry key 2 TTPs
evasion

Query Registry
T1012

Virtualization/Sandbox Evasion
T1497

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:

Signed PO.exe

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

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

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:

Signed PO.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	Signed PO.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\Disk\Enum\0	Signed PO.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

Signed PO.exe

description pid process target process

PID 1632 set thread context of 1208 1632 Signed PO.exe Signed PO.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
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

Processes:

schtasks.exe

pid process

1856 schtasks.exe
Modifies registry key 1 TTPs 1 IoCs

Modify Registry
T1112

Processes:

REG.exe

pid process

1932 REG.exe
Suspicious behavior: EnumeratesProcesses 3 IoCs

Processes:

Signed PO.exeSigned PO.exe

pid process

1632 Signed PO.exe
1208 Signed PO.exe
1208 Signed PO.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

Signed PO.exeSigned PO.exe

description pid process

Token: SeDebugPrivilege 1632 Signed PO.exe
Token: SeDebugPrivilege 1208 Signed PO.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

Signed PO.exe

pid process

1208 Signed PO.exe

description	pid	process	target process
PID 1632 set thread context of 1208	1632	Signed PO.exe	Signed PO.exe

pid	process
1856	schtasks.exe

pid	process
1932	REG.exe

pid	process
1632	Signed PO.exe
1208	Signed PO.exe
1208	Signed PO.exe

description	pid	process
Token: SeDebugPrivilege	1632	Signed PO.exe
Token: SeDebugPrivilege	1208	Signed PO.exe

pid	process
1208	Signed PO.exe

Suspicious use of WriteProcessMemory 17 IoCs

Processes:

Signed PO.exeSigned PO.exe

description	pid	process	target process
PID 1632 wrote to memory of 1856	1632	Signed PO.exe	schtasks.exe
PID 1632 wrote to memory of 1856	1632	Signed PO.exe	schtasks.exe
PID 1632 wrote to memory of 1856	1632	Signed PO.exe	schtasks.exe
PID 1632 wrote to memory of 1856	1632	Signed PO.exe	schtasks.exe
PID 1632 wrote to memory of 1208	1632	Signed PO.exe	Signed PO.exe
PID 1632 wrote to memory of 1208	1632	Signed PO.exe	Signed PO.exe
PID 1632 wrote to memory of 1208	1632	Signed PO.exe	Signed PO.exe
PID 1632 wrote to memory of 1208	1632	Signed PO.exe	Signed PO.exe
PID 1632 wrote to memory of 1208	1632	Signed PO.exe	Signed PO.exe
PID 1632 wrote to memory of 1208	1632	Signed PO.exe	Signed PO.exe
PID 1632 wrote to memory of 1208	1632	Signed PO.exe	Signed PO.exe
PID 1632 wrote to memory of 1208	1632	Signed PO.exe	Signed PO.exe
PID 1632 wrote to memory of 1208	1632	Signed PO.exe	Signed PO.exe
PID 1208 wrote to memory of 1932	1208	Signed PO.exe	REG.exe
PID 1208 wrote to memory of 1932	1208	Signed PO.exe	REG.exe
PID 1208 wrote to memory of 1932	1208	Signed PO.exe	REG.exe
PID 1208 wrote to memory of 1932	1208	Signed PO.exe	REG.exe

C:\Users\Admin\AppData\Local\Temp\Signed PO.exe
"C:\Users\Admin\AppData\Local\Temp\Signed PO.exe"
1⤵
- 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:1632

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\znfoxXua" /XML "C:\Users\Admin\AppData\Local\Temp\tmp5CB0.tmp"
2⤵
- Creates scheduled task(s)
PID:1856

C:\Users\Admin\AppData\Local\Temp\Signed PO.exe
"{path}"
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1208

C:\Windows\SysWOW64\REG.exe
REG add HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer / v NoRun / t REG_DWORD / d 1 / f
3⤵
- Modifies registry key
PID:1932

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Virtualization/Sandbox Evasion

2

T1497

Modify Registry

1

T1112

Credential Access

Credentials in Files

3

T1081

Discovery

Query Registry

4

T1012

Virtualization/Sandbox Evasion

2

T1497

System Information Discovery

3

T1082

Peripheral Device Discovery

1

T1120

Lateral Movement

Collection

Data from Local System

3

T1005

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp5CB0.tmp
MD5
a2b33b52ef3d2fcd4a366954b06662f4

SHA1
06c3d950ef0472300404ce57d3eef4f4143fa59a

SHA256
14f5616cc2762a49cf149ea5f0557401ad77dfe1242d77bedd05730e84210b0a

SHA512
a1ae60e06094bab78b693eb273732ec477b987f8e376cbd91c2e0bf240b17c1faf720b2aa6c4769b8a431338cfa6bab5f8dea53617a6417d71b69f2fb41c3989

Download Submit
memory/1208-7-0x0000000000400000-0x0000000000466000-memory.dmp

Filesize
408KB

Download
memory/1208-8-0x00000000004612BE-mapping.dmp

Download
memory/1208-9-0x0000000000400000-0x0000000000466000-memory.dmp

Filesize
408KB

Download
memory/1208-10-0x0000000000400000-0x0000000000466000-memory.dmp

Filesize
408KB

Download
memory/1208-11-0x0000000074450000-0x0000000074B3E000-memory.dmp

Filesize
6.9MB

Download
memory/1632-0-0x0000000074450000-0x0000000074B3E000-memory.dmp

Filesize
6.9MB

Download
memory/1632-1-0x0000000000A40000-0x0000000000A41000-memory.dmp

Filesize
4KB

Download
memory/1632-3-0x00000000008C0000-0x00000000008D4000-memory.dmp

Filesize
80KB

Download
memory/1632-4-0x0000000005ED0000-0x0000000005F5A000-memory.dmp

Filesize
552KB

Download
memory/1856-5-0x0000000000000000-mapping.dmp

Download
memory/1932-14-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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