agenttesla | 706dffe7787c6025b9855fc714df320be1e52737cc54c84f74b1eb5862e191a8

Analysis

max time kernel
96s
max time network
134s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
10-09-2024 20:24

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General

Target

HALKBANK.exe
Size

628KB
MD5

237cf82937b3c324379f1212def19d2e
SHA1

8716ca06800298c5ec280add1ad3be3f0c09d941
SHA256

cdb2c3c7b1e754dbd207b98d12c29ca23ef787e2a64dddc5ebad6e1a3f9683c4
SHA512

9a7f435278f54dfcab8f441e248bf648d4840e781eb05cd9c786e831e5b3a61eb7b0b9c478cc83f17f64ad17ceaf13f12314fca264a896dc383a8f7d02b05dd7
SSDEEP

6144:OvvvU+JPISbmf4y8Y5OHyoEcHHwv00QZXv7/Ylp8bn5etL2r8:uUQxbtrNgpcn5eth

Score

10^/10

agenttesla collection credential_access defense_evasion discovery 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

AgentTesla payload 3 IoCs

resource	yara_rule
behavioral2/memory/4036-1-0x0000000000DE0000-0x0000000000E82000-memory.dmp	family_agenttesla
behavioral2/files/0x0007000000023453-15.dat	family_agenttesla
behavioral2/memory/3900-29-0x0000000000400000-0x000000000044C000-memory.dmp	family_agenttesla

Credentials from Password Stores: Credentials from Web Browsers 1 TTPs
Malicious Access or copy of Web Browser Credential store.
credential_access stealer

Credentials from Web Browsers
T1555.003

System Binary Proxy Execution: Regsvcs/Regasm 1 TTPs 2 IoCs

Abuse Regasm to proxy execution of malicious code.

defense_evasion

Regsvcs/Regasm

T1218.009

description	ioc	Process
File created	C:\Users\Admin\AppData\Local\Temp\RegAsm.exe	HALKBANK.exe
Key opened	\Registry\Machine\Software\Microsoft\Windows NT\CurrentVersion\AppCompatFlags\Custom\RegAsm.exe	application.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1302416131-1437503476-2806442725-1000\Control Panel\International\Geo\Nation	HALKBANK.exe

Executes dropped EXE 2 IoCs

pid	Process
3940	application.exe
3900	RegAsm.exe

Reads WinSCP keys stored on the system 2 TTPs
Tries to access WinSCP stored sessions.
spyware stealer

Data from Local System
T1005

Credentials in Registry
T1552.002
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
T1552.001
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
T1552.001
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
T1552.001
Unsecured Credentials: Credentials In Files 1 TTPs
Steal credentials from unsecured files.
credential_access stealer

Credentials In Files
T1552.001

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1302416131-1437503476-2806442725-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe
Key opened	\REGISTRY\USER\S-1-5-21-1302416131-1437503476-2806442725-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe
Key opened	\REGISTRY\USER\S-1-5-21-1302416131-1437503476-2806442725-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1302416131-1437503476-2806442725-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\application = "C:\\Windows\\system32\\pcalua.exe -a C:\\Users\\Admin\\AppData\\Roaming\\application.exe"	reg.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3940 set thread context of 3900	3940	application.exe	98

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 5 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	reg.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	application.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegAsm.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	HALKBANK.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Suspicious behavior: EnumeratesProcesses 29 IoCs

pid	Process
4036	HALKBANK.exe
4036	HALKBANK.exe
4036	HALKBANK.exe
4036	HALKBANK.exe
4036	HALKBANK.exe
4036	HALKBANK.exe
4036	HALKBANK.exe
4036	HALKBANK.exe
4036	HALKBANK.exe
4036	HALKBANK.exe
4036	HALKBANK.exe
4036	HALKBANK.exe
4036	HALKBANK.exe
4036	HALKBANK.exe
4036	HALKBANK.exe
4036	HALKBANK.exe
4036	HALKBANK.exe
4036	HALKBANK.exe
4036	HALKBANK.exe
4036	HALKBANK.exe
4036	HALKBANK.exe
4036	HALKBANK.exe
4036	HALKBANK.exe
4036	HALKBANK.exe
3940	application.exe
3940	application.exe
3940	application.exe
3900	RegAsm.exe
3900	RegAsm.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	4036	HALKBANK.exe
Token: SeDebugPrivilege	3940	application.exe
Token: SeDebugPrivilege	3900	RegAsm.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 4036 wrote to memory of 2028	4036	HALKBANK.exe	86
PID 4036 wrote to memory of 2028	4036	HALKBANK.exe	86
PID 4036 wrote to memory of 2028	4036	HALKBANK.exe	86
PID 2028 wrote to memory of 2648	2028	cmd.exe	88
PID 2028 wrote to memory of 2648	2028	cmd.exe	88
PID 2028 wrote to memory of 2648	2028	cmd.exe	88
PID 4036 wrote to memory of 3940	4036	HALKBANK.exe	96
PID 4036 wrote to memory of 3940	4036	HALKBANK.exe	96
PID 4036 wrote to memory of 3940	4036	HALKBANK.exe	96
PID 3940 wrote to memory of 3900	3940	application.exe	98
PID 3940 wrote to memory of 3900	3940	application.exe	98
PID 3940 wrote to memory of 3900	3940	application.exe	98
PID 3940 wrote to memory of 3900	3940	application.exe	98
PID 3940 wrote to memory of 3900	3940	application.exe	98
PID 3940 wrote to memory of 3900	3940	application.exe	98
PID 3940 wrote to memory of 3900	3940	application.exe	98
PID 3940 wrote to memory of 3900	3940	application.exe	98

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1302416131-1437503476-2806442725-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1302416131-1437503476-2806442725-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe

C:\Users\Admin\AppData\Local\Temp\HALKBANK.exe
"C:\Users\Admin\AppData\Local\Temp\HALKBANK.exe"
1⤵
- System Binary Proxy Execution: Regsvcs/Regasm
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4036
- C:\Windows\SysWOW64\cmd.exe
  "cmd.exe" /c REG ADD HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run /f /v application /t REG_SZ /d C:\Windows\system32\pcalua.exe" -a C:\Users\Admin\AppData\Roaming\application.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2028
- - C:\Windows\SysWOW64\reg.exe
    REG ADD HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run /f /v application /t REG_SZ /d C:\Windows\system32\pcalua.exe" -a C:\Users\Admin\AppData\Roaming\application.exe"
    3⤵
    - Adds Run key to start application
    - System Location Discovery: System Language Discovery
    PID:2648
- C:\Users\Admin\AppData\Roaming\application.exe
  "C:\Users\Admin\AppData\Roaming\application.exe"
  2⤵
  - System Binary Proxy Execution: Regsvcs/Regasm
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3940
- - C:\Users\Admin\AppData\Local\Temp\RegAsm.exe
    "C:\Users\Admin\AppData\Local\Temp\RegAsm.exe"
    3⤵
    - Executes dropped EXE
    - Accesses Microsoft Outlook profiles
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - outlook_office_path
    - outlook_win_path
    PID:3900

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

System Binary Proxy Execution

T1218

Regsvcs/Regasm

T1218.009

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Credentials in Registry

T1552.002

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Data from Local System

T1005

Email Collection

T1114

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\RegAsm.exe

Filesize
63KB

MD5
0d5df43af2916f47d00c1573797c1a13

SHA1
230ab5559e806574d26b4c20847c368ed55483b0

SHA256
c066aee7aa3aa83f763ebc5541daa266ed6c648fbffcde0d836a13b221bb2adc

SHA512
f96cf9e1890746b12daf839a6d0f16f062b72c1b8a40439f96583f242980f10f867720232a6fa0f7d4d7ac0a7a6143981a5a130d6417ea98b181447134c7cfe2

Download Submit
C:\Users\Admin\AppData\Roaming\application.exe

Filesize
628KB

MD5
237cf82937b3c324379f1212def19d2e

SHA1
8716ca06800298c5ec280add1ad3be3f0c09d941

SHA256
cdb2c3c7b1e754dbd207b98d12c29ca23ef787e2a64dddc5ebad6e1a3f9683c4

SHA512
9a7f435278f54dfcab8f441e248bf648d4840e781eb05cd9c786e831e5b3a61eb7b0b9c478cc83f17f64ad17ceaf13f12314fca264a896dc383a8f7d02b05dd7

Download Submit
memory/3900-29-0x0000000000400000-0x000000000044C000-memory.dmp

Filesize
304KB

Download
memory/3900-38-0x0000000006CF0000-0x0000000006CFA000-memory.dmp

Filesize
40KB

Download
memory/3900-37-0x0000000006D60000-0x0000000006DB0000-memory.dmp

Filesize
320KB

Download
memory/3900-36-0x00000000066B0000-0x0000000006716000-memory.dmp

Filesize
408KB

Download
memory/3900-35-0x0000000006620000-0x0000000006638000-memory.dmp

Filesize
96KB

Download
memory/3900-34-0x0000000005A40000-0x0000000005ADC000-memory.dmp

Filesize
624KB

Download
memory/3940-33-0x0000000074860000-0x0000000075010000-memory.dmp

Filesize
7.7MB

Download
memory/3940-27-0x0000000074860000-0x0000000075010000-memory.dmp

Filesize
7.7MB

Download
memory/3940-25-0x0000000074860000-0x0000000075010000-memory.dmp

Filesize
7.7MB

Download
memory/3940-23-0x0000000074860000-0x0000000075010000-memory.dmp

Filesize
7.7MB

Download
memory/3940-26-0x0000000074860000-0x0000000075010000-memory.dmp

Filesize
7.7MB

Download
memory/4036-6-0x0000000008290000-0x00000000082D4000-memory.dmp

Filesize
272KB

Download
memory/4036-24-0x0000000074860000-0x0000000075010000-memory.dmp

Filesize
7.7MB

Download
memory/4036-10-0x0000000074860000-0x0000000075010000-memory.dmp

Filesize
7.7MB

Download
memory/4036-9-0x000000007486E000-0x000000007486F000-memory.dmp

Filesize
4KB

Download
memory/4036-8-0x0000000074860000-0x0000000075010000-memory.dmp

Filesize
7.7MB

Download
memory/4036-0-0x000000007486E000-0x000000007486F000-memory.dmp

Filesize
4KB

Download
memory/4036-5-0x0000000074860000-0x0000000075010000-memory.dmp

Filesize
7.7MB

Download
memory/4036-4-0x0000000005830000-0x000000000583A000-memory.dmp

Filesize
40KB

Download
memory/4036-3-0x0000000007E70000-0x0000000007F02000-memory.dmp

Filesize
584KB

Download
memory/4036-2-0x0000000008420000-0x00000000089C4000-memory.dmp

Filesize
5.6MB

Download
memory/4036-1-0x0000000000DE0000-0x0000000000E82000-memory.dmp

Filesize
648KB

Download