agenttesla | 283e544c4bb4dcba6f6b982e53d33bb1b2bf342314f92b144bc98f4ebafbce05

Analysis

max time kernel
140s
max time network
97s
platform
windows7_x64
resource
win7v200430
submitted
10/07/2020, 10:21

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General

Target
HALKBANK.exe
Size 2.8MB
Sample200710-9e4grblyvn
SHA256 283e544c4bb4dcba6f6b982e53d33bb1b2bf342314f92b144bc98f4ebafbce05
MD5 fe768517f29326fe6c77a2ec75ebb115
SHA1 5f6996bc64096c6603ff732cf80b7a0336e75d45
SHA512 99a58f69eb138c29e2360a057536ae242b69d7c5cd1b71d06f5b9dcf3d74ecea887a6af0716f43f373c2bea3d2ab879d51526bfcc2ff74967e6c88a945ea1d14
MD5 SHA1 SHA512

Score

10^/10

agenttesla masslogger keylogger persistence ransomware spyware stealer trojan

Malware Config

Extracted

Path

C:\Users\Admin\AppData\Local\C8A579F880\Log.txt

masslogger

Ransom Note

<|| v2.1.0.0 ||> User Name: Admin IP: 154.61.71.13 Location: United States Windows OS: Microsoft Windows 7 Professional 64bit Windows Serial Key: HYF8J-CVRMY-CM74G-RPHKF-PW487 CPU: Persocon Processor 2.5+ GPU: Standard VGA Graphics Adapter AV: NA Screen Resolution: 1280x720 Current Time: 7/10/2020 12:22:11 PM MassLogger Started: 7/10/2020 12:22:07 PM Interval: 2 hour MassLogger Process: C:\Users\Admin\AppData\Local\Temp\InstallUtil.exe MassLogger Melt: false MassLogger Exit after delivery: false As Administrator: True Processes: <|| WD Exclusion ||> Disabled <|| Binder ||> Disabled <|| Downloader ||> Disabled <|| USB Spread ||> Disabled <|| Bot Killer ||> Disabled <|| Window Searcher ||> Disabled <|| Search And Upload ||> Disabled <|| Telegram Desktop ||> Not Installed <|| Pidgin ||> Not Installed <|| FileZilla ||> Not Installed <|| Discord Tokken ||> Not Installed <|| NordVPN ||> Not Installed <|| Outlook ||> Not Installed <|| FoxMail ||> Not Installed <|| Thunderbird ||> Not Installed <|| FireFox ||> Not Found <|| QQ Browser ||> Not Installed <|| Chromium Recovery ||> Not Installed or Not Found <|| Keylogger And Clipboard ||> Disabled

Extracted

Family

agenttesla

Credentials

Protocol
smtp
Host
mail.decoplanet.net
Port
587
Username
[email protected]
Password
ayla1939

Signatures

AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
keylogger trojan stealer spyware agenttesla
MassLogger
Masslogger is a .NET stealer targeting passwords from browsers, email and cryptocurrency clients.
stealer spyware masslogger

MassLogger Main Payload 6 IoCs

resource	yara_rule
behavioral1/files/0x00040000000131aa-3.dat	family_masslogger
behavioral1/files/0x00040000000131aa-5.dat	family_masslogger
behavioral1/files/0x00040000000131aa-6.dat	family_masslogger
behavioral1/memory/2008-22-0x000000000049419E-mapping.dmp	family_masslogger
behavioral1/memory/2008-24-0x0000000000090000-0x000000000012A000-memory.dmp	family_masslogger
behavioral1/memory/2008-25-0x0000000000090000-0x000000000012A000-memory.dmp	family_masslogger

MassLogger log file 1 IoCs

Detects a log file produced by MassLogger.

yara_rule
masslogger_log_file

AgentTesla Payload 4 IoCs

resource	yara_rule
behavioral1/memory/1336-10-0x0000000000400000-0x000000000044C000-memory.dmp	family_agenttesla
behavioral1/memory/1336-11-0x0000000000446EBE-mapping.dmp	family_agenttesla
behavioral1/memory/1336-13-0x0000000000400000-0x000000000044C000-memory.dmp	family_agenttesla
behavioral1/memory/1336-14-0x0000000000400000-0x000000000044C000-memory.dmp	family_agenttesla

Executes dropped EXE 3 IoCs

pid	Process
1844	chromee.exe
1336	RegAsm.exe
2008	InstallUtil.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-1-5-21-910373003-3952921535-3480519689-1000\Control Panel\International\Geo\Nation	InstallUtil.exe

Loads dropped DLL 4 IoCs

pid	Process
1492	HALKBANK.exe
1492	HALKBANK.exe
1336	RegAsm.exe
1844	chromee.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

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-910373003-3952921535-3480519689-1000\Software\Microsoft\Windows\CurrentVersion\Run	reg.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-910373003-3952921535-3480519689-1000\Software\Microsoft\Windows\CurrentVersion\Run\chromee = "C:\\Windows\\system32\\pcalua.exe -a C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\Windows\\Start Menu\\Programs\\chromee.exe"	reg.exe

Looks up external IP address via web service 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
4	api.ipify.org

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1492 set thread context of 1336	1492	HALKBANK.exe	30
PID 1844 set thread context of 2008	1844	chromee.exe	32

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 9 IoCs

pid	Process
1492	HALKBANK.exe
1492	HALKBANK.exe
1492	HALKBANK.exe
1844	chromee.exe
1336	RegAsm.exe
1336	RegAsm.exe
1844	chromee.exe
1844	chromee.exe
2008	InstallUtil.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	1492	HALKBANK.exe
Token: SeDebugPrivilege	1844	chromee.exe
Token: SeDebugPrivilege	1336	RegAsm.exe
Token: SeDebugPrivilege	2008	InstallUtil.exe

Suspicious use of WriteProcessMemory 36 IoCs

description	pid	Process	procid_target
PID 1492 wrote to memory of 1844	1492	HALKBANK.exe	26
PID 1492 wrote to memory of 1844	1492	HALKBANK.exe	26
PID 1492 wrote to memory of 1844	1492	HALKBANK.exe	26
PID 1492 wrote to memory of 1844	1492	HALKBANK.exe	26
PID 1492 wrote to memory of 756	1492	HALKBANK.exe	27
PID 1492 wrote to memory of 756	1492	HALKBANK.exe	27
PID 1492 wrote to memory of 756	1492	HALKBANK.exe	27
PID 1492 wrote to memory of 756	1492	HALKBANK.exe	27
PID 756 wrote to memory of 1256	756	cmd.exe	29
PID 756 wrote to memory of 1256	756	cmd.exe	29
PID 756 wrote to memory of 1256	756	cmd.exe	29
PID 756 wrote to memory of 1256	756	cmd.exe	29
PID 1492 wrote to memory of 1336	1492	HALKBANK.exe	30
PID 1492 wrote to memory of 1336	1492	HALKBANK.exe	30
PID 1492 wrote to memory of 1336	1492	HALKBANK.exe	30
PID 1492 wrote to memory of 1336	1492	HALKBANK.exe	30
PID 1492 wrote to memory of 1336	1492	HALKBANK.exe	30
PID 1492 wrote to memory of 1336	1492	HALKBANK.exe	30
PID 1492 wrote to memory of 1336	1492	HALKBANK.exe	30
PID 1492 wrote to memory of 1336	1492	HALKBANK.exe	30
PID 1492 wrote to memory of 1336	1492	HALKBANK.exe	30
PID 1492 wrote to memory of 1336	1492	HALKBANK.exe	30
PID 1492 wrote to memory of 1336	1492	HALKBANK.exe	30
PID 1492 wrote to memory of 1336	1492	HALKBANK.exe	30
PID 1844 wrote to memory of 2008	1844	chromee.exe	32
PID 1844 wrote to memory of 2008	1844	chromee.exe	32
PID 1844 wrote to memory of 2008	1844	chromee.exe	32
PID 1844 wrote to memory of 2008	1844	chromee.exe	32
PID 1844 wrote to memory of 2008	1844	chromee.exe	32
PID 1844 wrote to memory of 2008	1844	chromee.exe	32
PID 1844 wrote to memory of 2008	1844	chromee.exe	32
PID 1844 wrote to memory of 2008	1844	chromee.exe	32
PID 1844 wrote to memory of 2008	1844	chromee.exe	32
PID 1844 wrote to memory of 2008	1844	chromee.exe	32
PID 1844 wrote to memory of 2008	1844	chromee.exe	32
PID 1844 wrote to memory of 2008	1844	chromee.exe	32

C:\Users\Admin\AppData\Local\Temp\HALKBANK.exe
"C:\Users\Admin\AppData\Local\Temp\HALKBANK.exe"
1⤵
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1492
- C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\chromee.exe
  "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\chromee.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1844
- - C:\Users\Admin\AppData\Local\Temp\InstallUtil.exe
    "C:\Users\Admin\AppData\Local\Temp\InstallUtil.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2008
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c REG ADD HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run /f /v chromee /t REG_SZ /d C:\Windows\system32\pcalua.exe" -a C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\chromee.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:756
- - C:\Windows\SysWOW64\reg.exe
    REG ADD HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run /f /v chromee /t REG_SZ /d C:\Windows\system32\pcalua.exe" -a C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\chromee.exe"
    3⤵
    - Adds Run key to start application
    PID:1256
- C:\Users\Admin\AppData\Local\Temp\RegAsm.exe
  "C:\Users\Admin\AppData\Local\Temp\RegAsm.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1336

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Credentials in Files

T1081

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

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Downloads

memory/1336-14-0x0000000000400000-0x000000000044C000-memory.dmp

Download

memory/1336-13-0x0000000000400000-0x000000000044C000-memory.dmp

Download

memory/1336-10-0x0000000000400000-0x000000000044C000-memory.dmp

Download

memory/2008-24-0x0000000000090000-0x000000000012A000-memory.dmp

Download

memory/2008-25-0x0000000000090000-0x000000000012A000-memory.dmp

Download