Malware Analysis Report

2024-08-06 14:52

Sample ID 240704-b71deaxhnq
Target RarExtInstaller.exe
SHA256 a263a46b2e8e46c8d1a9d1202e8b6c10f818a743bd8337e0ef2e6b130a0cf100
Tags
phemedrone spyware stealer
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK Matrix

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

a263a46b2e8e46c8d1a9d1202e8b6c10f818a743bd8337e0ef2e6b130a0cf100

Threat Level: Known bad

The file RarExtInstaller.exe was found to be: Known bad.

Malicious Activity Summary

phemedrone spyware stealer

Phemedrone

Reads user/profile data of web browsers

Suspicious use of SetThreadContext

Program crash

Unsigned PE

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

MITRE ATT&CK Matrix V13

Initial Access
TA0001
Execution
TA0002
Persistence
TA0003
Privilege Escalation
TA0004
Defense Evasion
TA0005
Credential Access
TA0006
Unsecured Credentials
T1552
Credentials In Files
T1552.001
Discovery
TA0007
Lateral Movement
TA0008
Collection
TA0009
Data from Local System
T1005
Exfiltration
TA0010
Command and Control
TA0011
Impact
TA0040
Resource Development
TA0042
Reconnaissance
TA0043

Analysis: static1

Detonation Overview

Reported

2024-07-04 01:47

Signatures

Unsigned PE

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

Analysis: behavioral2

Detonation Overview

Submitted

2024-07-04 01:47

Reported

2024-07-04 01:50

Platform

win10v2004-20240508-en

Max time kernel

41s

Max time network

50s

Command Line

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

Signatures

Phemedrone

stealer phemedrone

Reads user/profile data of web browsers

spyware stealer

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 4376 set thread context of 3380 N/A C:\Users\Admin\AppData\Local\Temp\RarExtInstaller.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe

Program crash

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\WerFault.exe C:\Users\Admin\AppData\Local\Temp\RarExtInstaller.exe
N/A N/A C:\Windows\SysWOW64\WerFault.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 4376 wrote to memory of 1392 N/A C:\Users\Admin\AppData\Local\Temp\RarExtInstaller.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 4376 wrote to memory of 1392 N/A C:\Users\Admin\AppData\Local\Temp\RarExtInstaller.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 4376 wrote to memory of 1392 N/A C:\Users\Admin\AppData\Local\Temp\RarExtInstaller.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 4376 wrote to memory of 3380 N/A C:\Users\Admin\AppData\Local\Temp\RarExtInstaller.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 4376 wrote to memory of 3380 N/A C:\Users\Admin\AppData\Local\Temp\RarExtInstaller.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 4376 wrote to memory of 3380 N/A C:\Users\Admin\AppData\Local\Temp\RarExtInstaller.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 4376 wrote to memory of 3380 N/A C:\Users\Admin\AppData\Local\Temp\RarExtInstaller.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 4376 wrote to memory of 3380 N/A C:\Users\Admin\AppData\Local\Temp\RarExtInstaller.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 4376 wrote to memory of 3380 N/A C:\Users\Admin\AppData\Local\Temp\RarExtInstaller.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 4376 wrote to memory of 3380 N/A C:\Users\Admin\AppData\Local\Temp\RarExtInstaller.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 4376 wrote to memory of 3380 N/A C:\Users\Admin\AppData\Local\Temp\RarExtInstaller.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe

Processes

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

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

C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe

"C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"

C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe

"C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 4376 -ip 4376

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 4376 -s 316

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 184 -p 3380 -ip 3380

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 3380 -s 1716

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 get.geojs.io udp

Files

memory/4376-0-0x0000000000620000-0x0000000000621000-memory.dmp

memory/3380-1-0x0000000000400000-0x0000000000422000-memory.dmp

memory/3380-2-0x0000000074C8E000-0x0000000074C8F000-memory.dmp

memory/3380-3-0x00000000058F0000-0x0000000005956000-memory.dmp

memory/3380-4-0x0000000006260000-0x00000000062F2000-memory.dmp

Analysis: behavioral1

Detonation Overview

Submitted

2024-07-04 01:47

Reported

2024-07-04 01:50

Platform

win7-20240419-en

Max time kernel

117s

Max time network

122s

Command Line

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

Signatures

Program crash

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\WerFault.exe C:\Users\Admin\AppData\Local\Temp\RarExtInstaller.exe

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2460 wrote to memory of 2232 N/A C:\Users\Admin\AppData\Local\Temp\RarExtInstaller.exe C:\Windows\SysWOW64\WerFault.exe
PID 2460 wrote to memory of 2232 N/A C:\Users\Admin\AppData\Local\Temp\RarExtInstaller.exe C:\Windows\SysWOW64\WerFault.exe
PID 2460 wrote to memory of 2232 N/A C:\Users\Admin\AppData\Local\Temp\RarExtInstaller.exe C:\Windows\SysWOW64\WerFault.exe
PID 2460 wrote to memory of 2232 N/A C:\Users\Admin\AppData\Local\Temp\RarExtInstaller.exe C:\Windows\SysWOW64\WerFault.exe

Processes

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

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

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2460 -s 96

Network

N/A

Files

memory/2460-0-0x0000000000140000-0x0000000000141000-memory.dmp