404keylogger | 359fa5321838f03c9d31e0b36bcee3bcfe91932fe169968516284a16342b4d9d

Analysis

max time kernel
123s
max time network
126s
platform
windows10-2004_x64
resource
win10v2004-en-20220112
submitted
01/02/2022, 07:32

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General

Target
359fa5321838f03c9d31e0b36bcee3bcfe91932fe169968516284a16342b4d9d.exe
Size 287KB
Sample220201-jdfe5sbdb2
SHA256 359fa5321838f03c9d31e0b36bcee3bcfe91932fe169968516284a16342b4d9d
MD5 b782d7edffce3cced7c88492a7ccd2fc
SHA1 cca6e2c9fde9b85b6a42b74aa28ca195f8240a10
SHA512 0a584ff0dc74b618a22b7d36fd1a78dd01320c8cb7d4c1d5b8e76b165a0d0cf9ea2fa846801e09b102a3f8389650757d847b2b2101d9abdae2e32d07215ad764
MD5 SHA1 SHA512

Score

10^/10

404keylogger collection keylogger persistence spyware stealer

Malware Config

Extracted

Credentials

Protocol
smtp
Host
mail.wasstech.com
Port
587
Username
[email protected]
Password
Sunray2700@@

Signatures

404 Keylogger
Information stealer and keylogger first seen in 2019.
stealer keylogger 404keylogger

404 Keylogger Main Executable 1 IoCs

resource	yara_rule
behavioral2/memory/3876-132-0x0000000000400000-0x0000000000422000-memory.dmp	family_404keylogger

Suspicious use of NtCreateProcessExOtherParentProcess 1 IoCs

description	pid	Process	procid_target
PID 2988 created 3876	2988	WerFault.exe	52

Sets service image path in registry 2 TTPs
persistence

Registry Run Keys / Startup Folder
T1060

Modify Registry
T1112
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
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 stealer

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 stealer

Data from Local System
T1005

Credentials in Files
T1081

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-790714498-1549421491-1643397139-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe
Key opened	\REGISTRY\USER\S-1-5-21-790714498-1549421491-1643397139-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe
Key opened	\REGISTRY\USER\S-1-5-21-790714498-1549421491-1643397139-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.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
17	checkip.dyndns.org

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1252 set thread context of 3876	1252	359fa5321838f03c9d31e0b36bcee3bcfe91932fe169968516284a16342b4d9d.exe	52

Drops file in Windows directory 1 IoCs

description	ioc	Process
File created	C:\Windows\AppCompat\Programs\Amcache.hve.tmp	WerFault.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2932	3876	WerFault.exe	52

Checks processor information in registry 2 TTPs 3 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	WerFault.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	WerFault.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	WerFault.exe

Enumerates system info in registry 2 TTPs 2 IoCs

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	WerFault.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	WerFault.exe

Modifies data under HKEY_USERS 41 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\WinTrust\Trust Providers\Software Publishing	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople\CRLs	WaaSMedicAgent.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
3876	RegAsm.exe
2932	WerFault.exe
2932	WerFault.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
1252	359fa5321838f03c9d31e0b36bcee3bcfe91932fe169968516284a16342b4d9d.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	3876	RegAsm.exe
Token: SeRestorePrivilege	2932	WerFault.exe
Token: SeBackupPrivilege	2932	WerFault.exe
Token: SeBackupPrivilege	2932	WerFault.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3876	RegAsm.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1252 wrote to memory of 3876	1252	359fa5321838f03c9d31e0b36bcee3bcfe91932fe169968516284a16342b4d9d.exe	52
PID 1252 wrote to memory of 3876	1252	359fa5321838f03c9d31e0b36bcee3bcfe91932fe169968516284a16342b4d9d.exe	52
PID 1252 wrote to memory of 3876	1252	359fa5321838f03c9d31e0b36bcee3bcfe91932fe169968516284a16342b4d9d.exe	52
PID 1252 wrote to memory of 3876	1252	359fa5321838f03c9d31e0b36bcee3bcfe91932fe169968516284a16342b4d9d.exe	52
PID 2988 wrote to memory of 3876	2988	WerFault.exe	52
PID 2988 wrote to memory of 3876	2988	WerFault.exe	52

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-790714498-1549421491-1643397139-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-790714498-1549421491-1643397139-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe

C:\Users\Admin\AppData\Local\Temp\359fa5321838f03c9d31e0b36bcee3bcfe91932fe169968516284a16342b4d9d.exe
"C:\Users\Admin\AppData\Local\Temp\359fa5321838f03c9d31e0b36bcee3bcfe91932fe169968516284a16342b4d9d.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:1252
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
  2⤵
  - Accesses Microsoft Outlook profiles
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - outlook_office_path
  - outlook_win_path
  PID:3876
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 3876 -s 2212
    3⤵
    - Drops file in Windows directory
    - Program crash
    - Checks processor information in registry
    - Enumerates system info in registry
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2932

C:\Windows\System32\WaaSMedicAgent.exe
C:\Windows\System32\WaaSMedicAgent.exe 2856cc67372e996eae50e38faa938d4f kwQiZ2u1hUyAo79KquAR8A.0.1.0.0.0
1⤵
- Modifies data under HKEY_USERS
PID:1484

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 3876 -ip 3876
1⤵
- Suspicious use of NtCreateProcessExOtherParentProcess
- Suspicious use of WriteProcessMemory
PID:2988

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

Email Collection

T1114

Command and Control

Exfiltration

Impact

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Downloads

memory/1252-130-0x0000000000A10000-0x0000000000A5E000-memory.dmp

Download

memory/1252-131-0x0000000002EE0000-0x0000000002EE3000-memory.dmp

Download

memory/3876-132-0x0000000000400000-0x0000000000422000-memory.dmp

Download

memory/3876-133-0x0000000005770000-0x0000000005D14000-memory.dmp

Download

memory/3876-134-0x00000000051C0000-0x000000000525C000-memory.dmp

Download

memory/3876-135-0x0000000005190000-0x0000000005191000-memory.dmp

Download

memory/3876-136-0x0000000005F90000-0x0000000005FF6000-memory.dmp

Download

memory/3876-137-0x00000000065D0000-0x0000000006792000-memory.dmp

Download

memory/3876-138-0x00000000068A0000-0x0000000006932000-memory.dmp

Download