agenttesla | 63abc500d2a9f12692276d1cd2becc0ce16719ab69a69ea9827bd411f12b4291

Analysis

max time kernel
125s
max time network
14s
platform
windows7_x64
resource
win7v20210408
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:
cjnew@cjserverlogs2021luck.xyz
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
behavioral15/memory/596-73-0x00000000004374CE-mapping.dmp	family_agenttesla
behavioral15/memory/596-72-0x0000000000400000-0x000000000043C000-memory.dmp	family_agenttesla
behavioral15/memory/596-74-0x0000000000400000-0x000000000043C000-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 940 set thread context of 596 940 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 4 IoCs

Processes:

powershell.exeinquiries for WCB .exe

pid process

1456 powershell.exe
596 inquiries for WCB .exe
596 inquiries for WCB .exe
1456 powershell.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

powershell.exeinquiries for WCB .exe

description pid process

Token: SeDebugPrivilege 1456 powershell.exe
Token: SeDebugPrivilege 596 inquiries for WCB .exe

description	pid	process	target process
PID 940 set thread context of 596	940	inquiries for WCB .exe	inquiries for WCB .exe

pid	process
1456	powershell.exe
596	inquiries for WCB .exe
596	inquiries for WCB .exe
1456	powershell.exe

description	pid	process
Token: SeDebugPrivilege	1456	powershell.exe
Token: SeDebugPrivilege	596	inquiries for WCB .exe

Suspicious use of WriteProcessMemory 13 IoCs

Processes:

inquiries for WCB .exe

description	pid	process	target process
PID 940 wrote to memory of 1456	940	inquiries for WCB .exe	powershell.exe
PID 940 wrote to memory of 1456	940	inquiries for WCB .exe	powershell.exe
PID 940 wrote to memory of 1456	940	inquiries for WCB .exe	powershell.exe
PID 940 wrote to memory of 1456	940	inquiries for WCB .exe	powershell.exe
PID 940 wrote to memory of 596	940	inquiries for WCB .exe	inquiries for WCB .exe
PID 940 wrote to memory of 596	940	inquiries for WCB .exe	inquiries for WCB .exe
PID 940 wrote to memory of 596	940	inquiries for WCB .exe	inquiries for WCB .exe
PID 940 wrote to memory of 596	940	inquiries for WCB .exe	inquiries for WCB .exe
PID 940 wrote to memory of 596	940	inquiries for WCB .exe	inquiries for WCB .exe
PID 940 wrote to memory of 596	940	inquiries for WCB .exe	inquiries for WCB .exe
PID 940 wrote to memory of 596	940	inquiries for WCB .exe	inquiries for WCB .exe
PID 940 wrote to memory of 596	940	inquiries for WCB .exe	inquiries for WCB .exe
PID 940 wrote to memory of 596	940	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:940

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:1456

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:596

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Virtualization/Sandbox Evasion

T1497

Credential Access

Discovery

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

System Information Discovery

T1082

Peripheral Device Discovery

T1120

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

memory/596-73-0x00000000004374CE-mapping.dmp

Download
memory/596-76-0x0000000000670000-0x0000000000671000-memory.dmp

Filesize
4KB

Download
memory/596-74-0x0000000000400000-0x000000000043C000-memory.dmp

Filesize
240KB

Download
memory/596-72-0x0000000000400000-0x000000000043C000-memory.dmp

Filesize
240KB

Download
memory/940-62-0x0000000001240000-0x0000000001241000-memory.dmp

Filesize
4KB

Download
memory/940-63-0x0000000000970000-0x000000000097D000-memory.dmp

Filesize
52KB

Download
memory/940-64-0x0000000004CC0000-0x0000000004D3C000-memory.dmp

Filesize
496KB

Download
memory/940-65-0x0000000001040000-0x000000000107E000-memory.dmp

Filesize
248KB

Download
memory/940-60-0x00000000012E0000-0x00000000012E1000-memory.dmp

Filesize
4KB

Download
memory/1456-67-0x0000000075051000-0x0000000075053000-memory.dmp

Filesize
8KB

Download
memory/1456-78-0x0000000004790000-0x0000000004791000-memory.dmp

Filesize
4KB

Download
memory/1456-70-0x00000000047E0000-0x00000000047E1000-memory.dmp

Filesize
4KB

Download
memory/1456-69-0x0000000004820000-0x0000000004821000-memory.dmp

Filesize
4KB

Download
memory/1456-68-0x0000000000AC0000-0x0000000000AC1000-memory.dmp

Filesize
4KB

Download
memory/1456-66-0x0000000000000000-mapping.dmp

Download
memory/1456-77-0x0000000002450000-0x0000000002451000-memory.dmp

Filesize
4KB

Download
memory/1456-71-0x00000000047E2000-0x00000000047E3000-memory.dmp

Filesize
4KB

Download
memory/1456-81-0x0000000005610000-0x0000000005611000-memory.dmp

Filesize
4KB

Download
memory/1456-86-0x0000000005670000-0x0000000005671000-memory.dmp

Filesize
4KB

Download
memory/1456-87-0x0000000006240000-0x0000000006241000-memory.dmp

Filesize
4KB

Download
memory/1456-94-0x0000000005820000-0x0000000005821000-memory.dmp

Filesize
4KB

Download
memory/1456-95-0x000000007EF30000-0x000000007EF31000-memory.dmp

Filesize
4KB

Download
memory/1456-96-0x00000000055D0000-0x00000000055D1000-memory.dmp

Filesize
4KB

Download
memory/1456-110-0x0000000006300000-0x0000000006301000-memory.dmp

Filesize
4KB

Download
memory/1456-111-0x0000000006310000-0x0000000006311000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads