Malware Analysis Report

2024-10-19 10:21

Sample ID 220121-211zgacbc2
Target dc31e710277eac1b125de6f4626765a2684d992147691a33964e368e5f269cba
SHA256 dc31e710277eac1b125de6f4626765a2684d992147691a33964e368e5f269cba
Tags
crimsonrat rat
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V6

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

dc31e710277eac1b125de6f4626765a2684d992147691a33964e368e5f269cba

Threat Level: Known bad

The file dc31e710277eac1b125de6f4626765a2684d992147691a33964e368e5f269cba was found to be: Known bad.

Malicious Activity Summary

crimsonrat rat

CrimsonRAT Main Payload

CrimsonRat

Executes dropped EXE

Drops file in Program Files directory

Enumerates physical storage devices

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2022-01-21 23:03

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2022-01-21 23:03

Reported

2022-01-21 23:24

Platform

win7-en-20211208

Max time kernel

129s

Max time network

138s

Command Line

"C:\Users\Admin\AppData\Local\Temp\dc31e710277eac1b125de6f4626765a2684d992147691a33964e368e5f269cba.exe"

Signatures

CrimsonRAT Main Payload

Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A

CrimsonRat

rat crimsonrat

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\ProgramData\Hdlharas\dlrarhsiva.exe N/A

Drops file in Program Files directory

Description Indicator Process Target
File created C:\PROGRA~3\Hdlharas\dlrarhsiva.exe C:\Users\Admin\AppData\Local\Temp\dc31e710277eac1b125de6f4626765a2684d992147691a33964e368e5f269cba.exe N/A
File opened for modification C:\PROGRA~3\Hdlharas\dlrarhsiva.exe C:\Users\Admin\AppData\Local\Temp\dc31e710277eac1b125de6f4626765a2684d992147691a33964e368e5f269cba.exe N/A

Enumerates physical storage devices

Processes

C:\Users\Admin\AppData\Local\Temp\dc31e710277eac1b125de6f4626765a2684d992147691a33964e368e5f269cba.exe

"C:\Users\Admin\AppData\Local\Temp\dc31e710277eac1b125de6f4626765a2684d992147691a33964e368e5f269cba.exe"

C:\ProgramData\Hdlharas\dlrarhsiva.exe

"C:\ProgramData\Hdlharas\dlrarhsiva.exe"

Network

Country Destination Domain Proto
FR 185.136.161.124:6128 tcp
FR 185.136.161.124:8761 tcp
FR 185.136.161.124:11614 tcp

Files

memory/1592-54-0x00000000001E0000-0x00000000001FE000-memory.dmp

memory/1592-55-0x000000001B1E0000-0x000000001B1E2000-memory.dmp

C:\ProgramData\Hdlharas\dlrarhsiva.exe

MD5 64261d5f3b07671f15b7f10f2f78da3f
SHA1 d4f978177394024bb4d0e5b6b972a5f72f830181
SHA256 87f51b4632c5fbc351a59a234dfefef506d807f2c173aac23162b85d0d73c2ad
SHA512 3a9ff39e6bc7585b0b03f7327652e4c3b766563e8b183c25b6497e30956945add5684f1579862117e44c6bac2802601fc7c4d2a0daa1824f16c4da1fd6c9c91a

C:\ProgramData\Hdlharas\dlrarhsiva.exe

MD5 64261d5f3b07671f15b7f10f2f78da3f
SHA1 d4f978177394024bb4d0e5b6b972a5f72f830181
SHA256 87f51b4632c5fbc351a59a234dfefef506d807f2c173aac23162b85d0d73c2ad
SHA512 3a9ff39e6bc7585b0b03f7327652e4c3b766563e8b183c25b6497e30956945add5684f1579862117e44c6bac2802601fc7c4d2a0daa1824f16c4da1fd6c9c91a

memory/572-58-0x0000000000300000-0x0000000000C14000-memory.dmp

memory/572-59-0x000007FEFBC11000-0x000007FEFBC13000-memory.dmp

memory/572-60-0x000000001B940000-0x000000001B942000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2022-01-21 23:03

Reported

2022-01-21 23:24

Platform

win10-en-20211208

Max time kernel

171s

Max time network

202s

Command Line

"C:\Users\Admin\AppData\Local\Temp\dc31e710277eac1b125de6f4626765a2684d992147691a33964e368e5f269cba.exe"

Signatures

CrimsonRAT Main Payload

Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A

CrimsonRat

rat crimsonrat

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\ProgramData\Hdlharas\dlrarhsiva.exe N/A

Enumerates physical storage devices

Processes

C:\Users\Admin\AppData\Local\Temp\dc31e710277eac1b125de6f4626765a2684d992147691a33964e368e5f269cba.exe

"C:\Users\Admin\AppData\Local\Temp\dc31e710277eac1b125de6f4626765a2684d992147691a33964e368e5f269cba.exe"

C:\ProgramData\Hdlharas\dlrarhsiva.exe

"C:\ProgramData\Hdlharas\dlrarhsiva.exe"

Network

Country Destination Domain Proto
US 52.109.8.20:443 tcp
US 52.109.8.20:443 tcp
FR 185.136.161.124:6128 tcp
FR 185.136.161.124:8761 tcp
FR 185.136.161.124:11614 tcp

Files

memory/3168-115-0x000001E90E330000-0x000001E90E34E000-memory.dmp

memory/3168-116-0x000001E90E6B0000-0x000001E90E6B2000-memory.dmp

C:\ProgramData\Hdlharas\dlrarhsiva.exe

MD5 64261d5f3b07671f15b7f10f2f78da3f
SHA1 d4f978177394024bb4d0e5b6b972a5f72f830181
SHA256 87f51b4632c5fbc351a59a234dfefef506d807f2c173aac23162b85d0d73c2ad
SHA512 3a9ff39e6bc7585b0b03f7327652e4c3b766563e8b183c25b6497e30956945add5684f1579862117e44c6bac2802601fc7c4d2a0daa1824f16c4da1fd6c9c91a

C:\ProgramData\Hdlharas\dlrarhsiva.exe

MD5 64261d5f3b07671f15b7f10f2f78da3f
SHA1 d4f978177394024bb4d0e5b6b972a5f72f830181
SHA256 87f51b4632c5fbc351a59a234dfefef506d807f2c173aac23162b85d0d73c2ad
SHA512 3a9ff39e6bc7585b0b03f7327652e4c3b766563e8b183c25b6497e30956945add5684f1579862117e44c6bac2802601fc7c4d2a0daa1824f16c4da1fd6c9c91a

memory/3196-119-0x000001BF889C0000-0x000001BF892D4000-memory.dmp

memory/3196-120-0x000001BFA4080000-0x000001BFA4082000-memory.dmp