agenttesla | 63abc500d2a9f12692276d1cd2becc0ce16719ab69a69ea9827bd411f12b4291

Analysis

max time kernel
144s
max time network
145s
platform
windows10_x64
resource
win10v20210410
submitted
06-05-2021 22:02

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General

Target

inquiries for WCB .exe
Size

990KB
MD5

931935b4df4ffdbdf7fe06ddd0ec7cd1
SHA1

f41f4148962f5d0a6181c0cdf51e1d7c5b6ede8b
SHA256

5a5953c3eb2a3f323e0eeb4b30092026004a2408eadedd96818e505d26f7f846
SHA512

dc0e1bccf64bb8b4ff39fc1443d9f9c3c7ac90e4ac7b91bf58c75a28b3ca1736a238cd2d08f0eaed2212e21726fb438bd4fb977af29b278cb99b19831ab3487e

Score

10^/10

agenttesla evasion keylogger spyware stealer trojan

Malware Config

Extracted

Family

agenttesla

Credentials

Protocol: smtp
Host:
mail.privateemail.com
Port:
587
Username:
[email protected]
Password:
cjcurrent@5000

Signatures

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

AgentTesla Payload 3 IoCs

Processes:

resource	yara_rule
behavioral16/memory/368-131-0x0000000000400000-0x000000000043C000-memory.dmp	family_agenttesla
behavioral16/memory/368-132-0x00000000004374CE-mapping.dmp	family_agenttesla
behavioral16/memory/368-141-0x0000000004960000-0x0000000004E5E000-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:

inquiries for WCB .exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	inquiries for WCB .exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	inquiries for WCB .exe

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:

inquiries for WCB .exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	inquiries for WCB .exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum\0	inquiries for WCB .exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

inquiries for WCB .exe

description pid process target process

PID 3896 set thread context of 368 3896 inquiries for WCB .exe inquiries for WCB .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: EnumeratesProcesses 5 IoCs

Processes:

powershell.exeinquiries for WCB .exe

pid process

2668 powershell.exe
368 inquiries for WCB .exe
368 inquiries for WCB .exe
2668 powershell.exe
2668 powershell.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

powershell.exeinquiries for WCB .exe

description pid process

Token: SeDebugPrivilege 2668 powershell.exe
Token: SeDebugPrivilege 368 inquiries for WCB .exe

description	pid	process	target process
PID 3896 set thread context of 368	3896	inquiries for WCB .exe	inquiries for WCB .exe

pid	process
2668	powershell.exe
368	inquiries for WCB .exe
368	inquiries for WCB .exe
2668	powershell.exe
2668	powershell.exe

description	pid	process
Token: SeDebugPrivilege	2668	powershell.exe
Token: SeDebugPrivilege	368	inquiries for WCB .exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

inquiries for WCB .exe

description	pid	process	target process
PID 3896 wrote to memory of 2668	3896	inquiries for WCB .exe	powershell.exe
PID 3896 wrote to memory of 2668	3896	inquiries for WCB .exe	powershell.exe
PID 3896 wrote to memory of 2668	3896	inquiries for WCB .exe	powershell.exe
PID 3896 wrote to memory of 368	3896	inquiries for WCB .exe	inquiries for WCB .exe
PID 3896 wrote to memory of 368	3896	inquiries for WCB .exe	inquiries for WCB .exe
PID 3896 wrote to memory of 368	3896	inquiries for WCB .exe	inquiries for WCB .exe
PID 3896 wrote to memory of 368	3896	inquiries for WCB .exe	inquiries for WCB .exe
PID 3896 wrote to memory of 368	3896	inquiries for WCB .exe	inquiries for WCB .exe
PID 3896 wrote to memory of 368	3896	inquiries for WCB .exe	inquiries for WCB .exe
PID 3896 wrote to memory of 368	3896	inquiries for WCB .exe	inquiries for WCB .exe
PID 3896 wrote to memory of 368	3896	inquiries for WCB .exe	inquiries for WCB .exe

C:\Users\Admin\AppData\Local\Temp\inquiries for WCB .exe
"C:\Users\Admin\AppData\Local\Temp\inquiries for WCB .exe"
1⤵
- Checks BIOS information in registry
- Maps connected drives based on registry
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3896
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\inquiries for WCB .exe"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2668
- C:\Users\Admin\AppData\Local\Temp\inquiries for WCB .exe
  "C:\Users\Admin\AppData\Local\Temp\inquiries for WCB .exe"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:368

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Virtualization/Sandbox Evasion

T1497

Credential Access

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

Virtualization/Sandbox Evasion

T1497

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/368-131-0x0000000000400000-0x000000000043C000-memory.dmp

Filesize
240KB

Download
memory/368-141-0x0000000004960000-0x0000000004E5E000-memory.dmp

Filesize
5.0MB

Download
memory/368-132-0x00000000004374CE-mapping.dmp

Download
memory/2668-142-0x0000000007900000-0x0000000007901000-memory.dmp

Filesize
4KB

Download
memory/2668-133-0x0000000006ED0000-0x0000000006ED1000-memory.dmp

Filesize
4KB

Download
memory/2668-185-0x00000000045A3000-0x00000000045A4000-memory.dmp

Filesize
4KB

Download
memory/2668-184-0x000000007E5F0000-0x000000007E5F1000-memory.dmp

Filesize
4KB

Download
memory/2668-167-0x0000000009230000-0x0000000009231000-memory.dmp

Filesize
4KB

Download
memory/2668-166-0x0000000008E70000-0x0000000008E71000-memory.dmp

Filesize
4KB

Download
memory/2668-161-0x0000000008D10000-0x0000000008D11000-memory.dmp

Filesize
4KB

Download
memory/2668-125-0x0000000000000000-mapping.dmp

Download
memory/2668-154-0x0000000008D30000-0x0000000008D63000-memory.dmp

Filesize
204KB

Download
memory/2668-129-0x0000000004470000-0x0000000004471000-memory.dmp

Filesize
4KB

Download
memory/2668-130-0x0000000006FB0000-0x0000000006FB1000-memory.dmp

Filesize
4KB

Download
memory/2668-146-0x0000000007F50000-0x0000000007F51000-memory.dmp

Filesize
4KB

Download
memory/2668-145-0x0000000008180000-0x0000000008181000-memory.dmp

Filesize
4KB

Download
memory/2668-144-0x0000000007690000-0x0000000007691000-memory.dmp

Filesize
4KB

Download
memory/2668-137-0x00000000077C0000-0x00000000077C1000-memory.dmp

Filesize
4KB

Download
memory/2668-136-0x00000000045A0000-0x00000000045A1000-memory.dmp

Filesize
4KB

Download
memory/2668-139-0x00000000045A2000-0x00000000045A3000-memory.dmp

Filesize
4KB

Download
memory/3896-116-0x0000000005170000-0x0000000005171000-memory.dmp

Filesize
4KB

Download
memory/3896-114-0x0000000000860000-0x0000000000861000-memory.dmp

Filesize
4KB

Download
memory/3896-119-0x0000000005220000-0x0000000005221000-memory.dmp

Filesize
4KB

Download
memory/3896-117-0x0000000005710000-0x0000000005711000-memory.dmp

Filesize
4KB

Download
memory/3896-118-0x00000000052B0000-0x00000000052B1000-memory.dmp

Filesize
4KB

Download
memory/3896-126-0x000000000BFB0000-0x000000000BFB1000-memory.dmp

Filesize
4KB

Download
memory/3896-124-0x0000000005D90000-0x0000000005DCE000-memory.dmp

Filesize
248KB

Download
memory/3896-123-0x00000000010E0000-0x000000000115C000-memory.dmp

Filesize
496KB

Download
memory/3896-122-0x0000000005460000-0x000000000546D000-memory.dmp

Filesize
52KB

Download
memory/3896-121-0x0000000005210000-0x000000000570E000-memory.dmp

Filesize
5.0MB

Download
memory/3896-120-0x0000000005480000-0x0000000005481000-memory.dmp

Filesize
4KB

Download