404keylogger | 6e1e4c43639edf7e533f22aa67b4fbe57d43f8e66ce607ce61aef631fcc92ab3

General

Target

OC2211.exe
Size

587KB
MD5

b398016c2c3010ef8c0f27aa42b644a6
SHA1

3e4a79872d1b33f48bb6f07a21d5cb5806243194
SHA256

40ed2cee21f04d3dd5a62951a4b99976327816ee918255bc12b6d40247b2b1c0
SHA512

373ecc8e63b459b3d87ea835e69f4e924c0bd4ce37d00edf88609d29220778d40644b8347452c49d9c3c25a7925c7b605e40150351b685ec428c509f13c7dd88
SSDEEP

12288:KbeZ4+70pKXQlNVChbacUYBneDCAxRzaJVo4sqHm00Y1JkgB:oeyIObqneDCcqo7O551Jt

Score

10^/10

404keylogger collection credential_access discovery keylogger spyware stealer

Malware Config

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/3664-12-0x0000000000400000-0x0000000000422000-memory.dmp	family_404keylogger

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
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-1-5-21-2718105630-359604950-2820636825-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	OC2211.exe
Key opened	\REGISTRY\USER\S-1-5-21-2718105630-359604950-2820636825-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	OC2211.exe
Key opened	\REGISTRY\USER\S-1-5-21-2718105630-359604950-2820636825-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	OC2211.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
61	checkip.dyndns.org

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1352 set thread context of 3664	1352	OC2211.exe	107

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2040	3664	WerFault.exe	107

System Location Discovery: System Language Discovery 1 TTPs 2 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	OC2211.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	OC2211.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3664	OC2211.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1352 wrote to memory of 3664	1352	OC2211.exe	107
PID 1352 wrote to memory of 3664	1352	OC2211.exe	107
PID 1352 wrote to memory of 3664	1352	OC2211.exe	107
PID 1352 wrote to memory of 3664	1352	OC2211.exe	107
PID 1352 wrote to memory of 3664	1352	OC2211.exe	107
PID 1352 wrote to memory of 3664	1352	OC2211.exe	107
PID 1352 wrote to memory of 3664	1352	OC2211.exe	107
PID 1352 wrote to memory of 3664	1352	OC2211.exe	107

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2718105630-359604950-2820636825-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	OC2211.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2718105630-359604950-2820636825-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	OC2211.exe

C:\Users\Admin\AppData\Local\Temp\OC2211.exe
"C:\Users\Admin\AppData\Local\Temp\OC2211.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1352
- C:\Users\Admin\AppData\Local\Temp\OC2211.exe
  "C:\Users\Admin\AppData\Local\Temp\OC2211.exe"
  2⤵
  - Accesses Microsoft Outlook profiles
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - outlook_office_path
  - outlook_win_path
  PID:3664
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 3664 -s 1500
    3⤵
    - Program crash
    PID:2040

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3664 -ip 3664
1⤵
PID:1300

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials from Password Stores

1

T1555

Credentials from Web Browsers

1

T1555.003

Unsecured Credentials

4

T1552

Credentials In Files

4

T1552.001

Discovery

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Data from Local System

Email Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1352-8-0x0000000005D90000-0x0000000005D9A000-memory.dmp

Filesize
40KB

Download
memory/1352-2-0x0000000005950000-0x00000000059EC000-memory.dmp

Filesize
624KB

Download
memory/1352-9-0x000000007451E000-0x000000007451F000-memory.dmp

Filesize
4KB

Download
memory/1352-10-0x0000000074510000-0x0000000074CC0000-memory.dmp

Filesize
7.7MB

Download
memory/1352-4-0x0000000005AA0000-0x0000000005B32000-memory.dmp

Filesize
584KB

Download
memory/1352-5-0x0000000005A40000-0x0000000005A4A000-memory.dmp

Filesize
40KB

Download
memory/1352-6-0x0000000005CC0000-0x0000000005D16000-memory.dmp

Filesize
344KB

Download
memory/1352-7-0x0000000074510000-0x0000000074CC0000-memory.dmp

Filesize
7.7MB

Download
memory/1352-0-0x000000007451E000-0x000000007451F000-memory.dmp

Filesize
4KB

Download
memory/1352-1-0x0000000000F20000-0x0000000000FBA000-memory.dmp

Filesize
616KB

Download
memory/1352-3-0x0000000005FB0000-0x0000000006554000-memory.dmp

Filesize
5.6MB

Download
memory/1352-11-0x00000000018D0000-0x000000000192C000-memory.dmp

Filesize
368KB

Download
memory/1352-15-0x0000000074510000-0x0000000074CC0000-memory.dmp

Filesize
7.7MB

Download
memory/3664-14-0x0000000074510000-0x0000000074CC0000-memory.dmp

Filesize
7.7MB

Download
memory/3664-12-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/3664-16-0x0000000074510000-0x0000000074CC0000-memory.dmp

Filesize
7.7MB

Download
memory/3664-17-0x0000000006C40000-0x0000000006E02000-memory.dmp

Filesize
1.8MB

Download
memory/3664-18-0x0000000074510000-0x0000000074CC0000-memory.dmp

Filesize
7.7MB

Download

Analysis

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