milleniumrat | 1b4e425b91b6469138cf882685b3c369e10d81b6ac3cbf46bc1e01dafac03c1a

General

Target

built.exe
Size

5.6MB
MD5

5480b8e0625d39560ae2bc4a329bd423
SHA1

eb3102cbc197dd4217c7d6efb73fb0bec6678410
SHA256

1b4e425b91b6469138cf882685b3c369e10d81b6ac3cbf46bc1e01dafac03c1a
SHA512

454271aa8d02427fadfb30c4874e6f293aa0e4f5ae4d008889d82bb5122b1c6352e7860600c8c051f76030437d91cdc5235a3158175dbad7343156264b3340a7
SSDEEP

98304:c24l27OuKr+gvhf2U9Nzm31PMoslkqXf0FvUcwti78OqJ7TPBvc8X6Uc:cYOuK6mn9NzgMoYkSIvUcwti7TQlvciE

Score

10^/10

milleniumrat discovery persistence rat spyware stealer

Malware Config

Signatures

MilleniumRat
MilleniumRat is a remote access trojan written in C#.
rat stealer milleniumrat
Loads dropped DLL 1 IoCs

Processes:

built.exe

pid process

2124 built.exe
Reads user/profile data of web browsers 3 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

Credentials from Web Browsers
T1555.003

pid	process
2124	built.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

reg.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2703099537-420551529-3771253338-1000\Software\Microsoft\Windows\CurrentVersion\Run\ChromeUpdate = "C:\\Users\\Admin\\AppData\\Local\\Temp\\built.exe"	reg.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service
T1102

Processes:

flow ioc

6 raw.githubusercontent.com
7 raw.githubusercontent.com
Looks up external IP address via web service 1 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.

Processes:

flow ioc

4 ip-api.com
Browser Information Discovery 1 TTPs
Enumerate browser information.
discovery

Browser Information Discovery
T1217
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

flow	ioc
6	raw.githubusercontent.com
7	raw.githubusercontent.com

flow	ioc
4	ip-api.com

Checks processor information in registry 2 TTPs 2 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

Processes:

built.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\Description\System\CentralProcessor\0	built.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	built.exe

Modifies registry key 1 TTPs 1 IoCs

Modify Registry
T1112

Processes:

reg.exe

pid process

2732 reg.exe
Suspicious behavior: EnumeratesProcesses 6 IoCs

Processes:

built.exe

pid process

2124 built.exe
2124 built.exe
2124 built.exe
2124 built.exe
2124 built.exe
2124 built.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

built.exe

description pid process

Token: SeDebugPrivilege 2124 built.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

built.exe

pid process

2124 built.exe

pid	process
2732	reg.exe

pid	process
2124	built.exe
2124	built.exe
2124	built.exe
2124	built.exe
2124	built.exe
2124	built.exe

description	pid	process
Token: SeDebugPrivilege	2124	built.exe

pid	process
2124	built.exe

Suspicious use of WriteProcessMemory 9 IoCs

Processes:

built.execmd.exe

description	pid	process	target process
PID 2124 wrote to memory of 2884	2124	built.exe	cmd.exe
PID 2124 wrote to memory of 2884	2124	built.exe	cmd.exe
PID 2124 wrote to memory of 2884	2124	built.exe	cmd.exe
PID 2884 wrote to memory of 2732	2884	cmd.exe	reg.exe
PID 2884 wrote to memory of 2732	2884	cmd.exe	reg.exe
PID 2884 wrote to memory of 2732	2884	cmd.exe	reg.exe
PID 2124 wrote to memory of 2668	2124	built.exe	WerFault.exe
PID 2124 wrote to memory of 2668	2124	built.exe	WerFault.exe
PID 2124 wrote to memory of 2668	2124	built.exe	WerFault.exe

C:\Users\Admin\AppData\Local\Temp\built.exe
"C:\Users\Admin\AppData\Local\Temp\built.exe"
1⤵
- Loads dropped DLL
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2124
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c reg add HKCU\Software\Microsoft\Windows\CurrentVersion\Run /v ChromeUpdate /t REG_SZ /d C:\Users\Admin\AppData\Local\Temp\built.exe /f
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2884
- - C:\Windows\system32\reg.exe
    reg add HKCU\Software\Microsoft\Windows\CurrentVersion\Run /v ChromeUpdate /t REG_SZ /d C:\Users\Admin\AppData\Local\Temp\built.exe /f
    3⤵
    - Adds Run key to start application
    - Modifies registry key
    PID:2732
- C:\Windows\system32\WerFault.exe
  C:\Windows\system32\WerFault.exe -u -p 2124 -s 1992
  2⤵
  PID:2668

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

2

T1112

Credential Access

Credentials from Password Stores

1

T1555

Credentials from Web Browsers

1

T1555.003

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

Browser Information Discovery

Query Registry

System Information Discovery

2

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Web Service

1

T1102

Exfiltration

Impact

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Downloads

\Users\Admin\AppData\Local\Temp\Costura\A54E036D2DCD19384E8EA53862E0DD8F\64\sqlite.interop.dll

Filesize
1.7MB

MD5
65ccd6ecb99899083d43f7c24eb8f869

SHA1
27037a9470cc5ed177c0b6688495f3a51996a023

SHA256
aba67c7e6c01856838b8bc6b0ba95e864e1fdcb3750aa7cdc1bc73511cea6fe4

SHA512
533900861fe36cf78b614d6a7ce741ff1172b41cbd5644b4a9542e6ca42702e6fbfb12f0fbaae8f5992320870a15e90b4f7bf180705fc9839db433413860be6d

Download Submit
memory/2124-0-0x000007FEF57F3000-0x000007FEF57F4000-memory.dmp

Filesize
4KB

Download
memory/2124-1-0x0000000000960000-0x0000000000F02000-memory.dmp

Filesize
5.6MB

Download
memory/2124-6-0x000007FEF57F0000-0x000007FEF61DC000-memory.dmp

Filesize
9.9MB

Download
memory/2124-7-0x000000001B300000-0x000000001B36A000-memory.dmp

Filesize
424KB

Download
memory/2124-9-0x000000001CB20000-0x000000001CBD2000-memory.dmp

Filesize
712KB

Download
memory/2124-11-0x0000000002740000-0x0000000002765000-memory.dmp

Filesize
148KB

Download
memory/2124-20-0x000007FEF57F3000-0x000007FEF57F4000-memory.dmp

Filesize
4KB

Download
memory/2124-21-0x000007FEF57F0000-0x000007FEF61DC000-memory.dmp

Filesize
9.9MB

Download
memory/2124-22-0x000007FEF57F0000-0x000007FEF61DC000-memory.dmp

Filesize
9.9MB

Download
memory/2124-23-0x000007FEF57F0000-0x000007FEF61DC000-memory.dmp

Filesize
9.9MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads