matiex | 597c71c6a2012cf5ccd4a5e8b97be637add1d690283331c709f4c8fee94dd280

General

Target

819096acf63b5d611a3009c559049e27_JaffaCakes118.exe
Size

479KB
MD5

819096acf63b5d611a3009c559049e27
SHA1

11aab366797c1d758b288002fcf79e38d7401dcb
SHA256

597c71c6a2012cf5ccd4a5e8b97be637add1d690283331c709f4c8fee94dd280
SHA512

5e2d50c87791d4a05144c2bcdd91f28b2ae464dbf6f23d3d1c04c255312b1b9c685619023c202d96cf7c0e8d432041ab365d4337b45dc6568a0a54dd1ab93b86
SSDEEP

6144:QZAFjCBUSf/f45NBQvOdS7965mgZBr7jbFSfMfqhWu4iW4ElEjyWBYa:IEOBWUvO4p6Q+J7vF+MQWT181

Score

10^/10

matiex collection credential_access discovery keylogger stealer

Malware Config

Extracted

Family

matiex

C2

https://api.telegram.org/bot1769987238:AAEQYijlXWT1FDvBzphYZ0NJ0B8IOgYjki0/sendMessage?chat_id=1816626867

Signatures

Matiex
Matiex is a keylogger and infostealer first seen in July 2020.
stealer keylogger matiex

Matiex Main payload 1 IoCs

resource	yara_rule
behavioral2/memory/4428-3-0x0000000000400000-0x0000000000476000-memory.dmp	family_matiex

Matiex family
matiex
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-1-5-21-2437139445-1151884604-3026847218-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe
Key opened	\REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe
Key opened	\REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe

Looks up external IP address via web service 3 IoCs

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

flow	ioc
16	freegeoip.app
19	freegeoip.app
8	checkip.dyndns.org

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4636 set thread context of 4428	4636	819096acf63b5d611a3009c559049e27_JaffaCakes118.exe	84

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1984	4428	WerFault.exe	84

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	819096acf63b5d611a3009c559049e27_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	MSBuild.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
4636	819096acf63b5d611a3009c559049e27_JaffaCakes118.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4428	MSBuild.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4636 wrote to memory of 4428	4636	819096acf63b5d611a3009c559049e27_JaffaCakes118.exe	84
PID 4636 wrote to memory of 4428	4636	819096acf63b5d611a3009c559049e27_JaffaCakes118.exe	84
PID 4636 wrote to memory of 4428	4636	819096acf63b5d611a3009c559049e27_JaffaCakes118.exe	84
PID 4636 wrote to memory of 4428	4636	819096acf63b5d611a3009c559049e27_JaffaCakes118.exe	84

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe

C:\Users\Admin\AppData\Local\Temp\819096acf63b5d611a3009c559049e27_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\819096acf63b5d611a3009c559049e27_JaffaCakes118.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:4636
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
  "C:\Users\Admin\AppData\Local\Temp\819096acf63b5d611a3009c559049e27_JaffaCakes118.exe"
  2⤵
  - Accesses Microsoft Outlook profiles
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - outlook_office_path
  - outlook_win_path
  PID:4428
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4428 -s 2028
    3⤵
    - Program crash
    PID:1984

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 188 -p 4428 -ip 4428
1⤵
PID:3932

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Email Collection

1

T1114

Command and Control

Exfiltration

Impact

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Downloads

memory/4428-3-0x0000000000400000-0x0000000000476000-memory.dmp

Filesize
472KB

Download
memory/4428-4-0x00000000744EE000-0x00000000744EF000-memory.dmp

Filesize
4KB

Download
memory/4428-5-0x0000000005270000-0x000000000530C000-memory.dmp

Filesize
624KB

Download
memory/4428-6-0x00000000058C0000-0x0000000005E64000-memory.dmp

Filesize
5.6MB

Download
memory/4428-7-0x0000000005380000-0x00000000053E6000-memory.dmp

Filesize
408KB

Download
memory/4428-8-0x00000000744E0000-0x0000000074C90000-memory.dmp

Filesize
7.7MB

Download
memory/4428-9-0x00000000744E0000-0x0000000074C90000-memory.dmp

Filesize
7.7MB

Download
memory/4636-1-0x0000000001280000-0x0000000001380000-memory.dmp

Filesize
1024KB

Download
memory/4636-2-0x0000000001560000-0x0000000001564000-memory.dmp

Filesize
16KB

Download

Analysis

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