Malware Analysis Report

2024-08-06 11:26

Sample ID 240614-gjedxsxcpa
Target Client-built.exe
SHA256 9b4870baf1a6e62580daceb460672b03cc4c002267686340969fd55aab71bbd7
Tags
quasar office04 spyware trojan
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK Matrix

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

9b4870baf1a6e62580daceb460672b03cc4c002267686340969fd55aab71bbd7

Threat Level: Known bad

The file Client-built.exe was found to be: Known bad.

Malicious Activity Summary

quasar office04 spyware trojan

Quasar RAT

Quasar family

Quasar payload

Executes dropped EXE

Enumerates physical storage devices

Unsigned PE

Suspicious use of AdjustPrivilegeToken

Suspicious use of FindShellTrayWindow

Suspicious use of SendNotifyMessage

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
Discovery
TA0007
System Information Discovery
T1082
Lateral Movement
TA0008
Collection
TA0009
Exfiltration
TA0010
Command and Control
TA0011
Impact
TA0040
Resource Development
TA0042
Reconnaissance
TA0043

Analysis: static1

Detonation Overview

Reported

2024-06-14 05:49

Signatures

Quasar family

quasar

Quasar payload

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

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-06-14 05:49

Reported

2024-06-14 05:52

Platform

win7-20240611-en

Max time kernel

138s

Max time network

152s

Command Line

"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"

Signatures

Quasar RAT

trojan spyware quasar

Quasar payload

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

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\SubDir\Client.exe N/A

Enumerates physical storage devices

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\Client-built.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Roaming\SubDir\Client.exe N/A

Suspicious use of FindShellTrayWindow

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\SubDir\Client.exe N/A

Suspicious use of SendNotifyMessage

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\SubDir\Client.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2964 wrote to memory of 2036 N/A C:\Users\Admin\AppData\Local\Temp\Client-built.exe C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
PID 2964 wrote to memory of 2036 N/A C:\Users\Admin\AppData\Local\Temp\Client-built.exe C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
PID 2964 wrote to memory of 2036 N/A C:\Users\Admin\AppData\Local\Temp\Client-built.exe C:\Users\Admin\AppData\Roaming\SubDir\Client.exe

Processes

C:\Users\Admin\AppData\Local\Temp\Client-built.exe

"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"

C:\Users\Admin\AppData\Roaming\SubDir\Client.exe

"C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 nexosmith1231-54169.portmap.host udp
DE 193.161.193.99:54169 nexosmith1231-54169.portmap.host tcp
DE 193.161.193.99:54169 nexosmith1231-54169.portmap.host tcp
DE 193.161.193.99:54169 nexosmith1231-54169.portmap.host tcp
DE 193.161.193.99:54169 nexosmith1231-54169.portmap.host tcp
DE 193.161.193.99:54169 nexosmith1231-54169.portmap.host tcp
DE 193.161.193.99:54169 nexosmith1231-54169.portmap.host tcp
DE 193.161.193.99:54169 nexosmith1231-54169.portmap.host tcp
DE 193.161.193.99:54169 nexosmith1231-54169.portmap.host tcp

Files

memory/2964-0-0x000007FEF5143000-0x000007FEF5144000-memory.dmp

memory/2964-1-0x00000000009F0000-0x0000000000D14000-memory.dmp

memory/2964-2-0x000007FEF5140000-0x000007FEF5B2C000-memory.dmp

C:\Users\Admin\AppData\Roaming\SubDir\Client.exe

MD5 cb9e331e962b60a93e14496d120515b3
SHA1 51ecbe795ea6e156c061dd91afc2c1bc6e8adcb4
SHA256 9b4870baf1a6e62580daceb460672b03cc4c002267686340969fd55aab71bbd7
SHA512 6b9b6294de1308ebc902f48f4d3de77afef27a45d5eb6cffa256a765d6b22d09184411bed0029420379f4fd22c4b137c0b6d12ef97d4a7b18d59d7ea6a2317ef

memory/2036-7-0x00000000003B0000-0x00000000006D4000-memory.dmp

memory/2036-8-0x000007FEF5140000-0x000007FEF5B2C000-memory.dmp

memory/2036-9-0x000007FEF5140000-0x000007FEF5B2C000-memory.dmp

memory/2964-10-0x000007FEF5140000-0x000007FEF5B2C000-memory.dmp

memory/2036-11-0x000007FEF5140000-0x000007FEF5B2C000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-14 05:49

Reported

2024-06-14 05:52

Platform

win10v2004-20240611-en

Max time kernel

149s

Max time network

151s

Command Line

"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"

Signatures

Quasar RAT

trojan spyware quasar

Quasar payload

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

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\SubDir\Client.exe N/A

Enumerates physical storage devices

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\Client-built.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Roaming\SubDir\Client.exe N/A

Suspicious use of FindShellTrayWindow

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\SubDir\Client.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\SubDir\Client.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\SubDir\Client.exe N/A

Suspicious use of SendNotifyMessage

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\SubDir\Client.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\SubDir\Client.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\SubDir\Client.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 708 wrote to memory of 1096 N/A C:\Users\Admin\AppData\Local\Temp\Client-built.exe C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
PID 708 wrote to memory of 1096 N/A C:\Users\Admin\AppData\Local\Temp\Client-built.exe C:\Users\Admin\AppData\Roaming\SubDir\Client.exe

Processes

C:\Users\Admin\AppData\Local\Temp\Client-built.exe

"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"

C:\Users\Admin\AppData\Roaming\SubDir\Client.exe

"C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 133.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 g.bing.com udp
US 204.79.197.237:443 g.bing.com tcp
NL 23.62.61.97:443 www.bing.com tcp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 237.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 nexosmith1231-54169.portmap.host udp
DE 193.161.193.99:54169 nexosmith1231-54169.portmap.host tcp
US 8.8.8.8:53 97.61.62.23.in-addr.arpa udp
US 8.8.8.8:53 ipwho.is udp
DE 195.201.57.90:443 ipwho.is tcp
US 8.8.8.8:53 99.193.161.193.in-addr.arpa udp
US 8.8.8.8:53 90.57.201.195.in-addr.arpa udp
DE 193.161.193.99:54169 nexosmith1231-54169.portmap.host tcp
US 8.8.8.8:53 183.59.114.20.in-addr.arpa udp
US 8.8.8.8:53 56.126.166.20.in-addr.arpa udp
US 8.8.8.8:53 57.15.31.184.in-addr.arpa udp
DE 193.161.193.99:54169 nexosmith1231-54169.portmap.host tcp
DE 193.161.193.99:54169 nexosmith1231-54169.portmap.host tcp
US 8.8.8.8:53 11.227.111.52.in-addr.arpa udp
DE 193.161.193.99:54169 nexosmith1231-54169.portmap.host tcp
DE 193.161.193.99:54169 nexosmith1231-54169.portmap.host tcp
DE 193.161.193.99:54169 nexosmith1231-54169.portmap.host tcp
US 8.8.8.8:53 udp

Files

memory/708-0-0x00007FFE00E93000-0x00007FFE00E95000-memory.dmp

memory/708-1-0x0000000000DD0000-0x00000000010F4000-memory.dmp

memory/708-2-0x00007FFE00E90000-0x00007FFE01951000-memory.dmp

C:\Users\Admin\AppData\Roaming\SubDir\Client.exe

MD5 cb9e331e962b60a93e14496d120515b3
SHA1 51ecbe795ea6e156c061dd91afc2c1bc6e8adcb4
SHA256 9b4870baf1a6e62580daceb460672b03cc4c002267686340969fd55aab71bbd7
SHA512 6b9b6294de1308ebc902f48f4d3de77afef27a45d5eb6cffa256a765d6b22d09184411bed0029420379f4fd22c4b137c0b6d12ef97d4a7b18d59d7ea6a2317ef

memory/708-8-0x00007FFE00E90000-0x00007FFE01951000-memory.dmp

memory/1096-9-0x00007FFE00E90000-0x00007FFE01951000-memory.dmp

memory/1096-10-0x00007FFE00E90000-0x00007FFE01951000-memory.dmp

memory/1096-11-0x000000001BBA0000-0x000000001BBF0000-memory.dmp

memory/1096-12-0x000000001BCB0000-0x000000001BD62000-memory.dmp

memory/1096-13-0x000000001BB70000-0x000000001BB82000-memory.dmp

memory/1096-14-0x000000001BC30000-0x000000001BC6C000-memory.dmp

memory/1096-15-0x00007FFE00E90000-0x00007FFE01951000-memory.dmp

memory/1096-16-0x00007FFE00E90000-0x00007FFE01951000-memory.dmp