Malware Analysis Report

2025-01-18 04:29

Sample ID 231231-p4hk3scegm
Target 15570cfcccc4a0a7aacd356fce6164fb.exe
SHA256 f176013ba4695eb876b9d3898e7b7649ac073ef0be38d84fbc43de02dd6964cf
Tags
quasar office04 spyware trojan
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

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

f176013ba4695eb876b9d3898e7b7649ac073ef0be38d84fbc43de02dd6964cf

Threat Level: Known bad

The file 15570cfcccc4a0a7aacd356fce6164fb.exe was found to be: Known bad.

Malicious Activity Summary

quasar office04 spyware trojan

Quasar payload

Quasar RAT

Executes dropped EXE

Checks computer location settings

Loads dropped DLL

Looks up external IP address via web service

Enumerates physical storage devices

Unsigned PE

Suspicious use of AdjustPrivilegeToken

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2023-12-31 12:52

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2023-12-31 12:52

Reported

2024-01-04 18:03

Platform

win7-20231129-en

Max time kernel

149s

Max time network

121s

Command Line

"C:\Users\Admin\AppData\Local\Temp\15570cfcccc4a0a7aacd356fce6164fb.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
N/A N/A N/A N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\dll.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\java\update.exe N/A

Loads dropped DLL

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\15570cfcccc4a0a7aacd356fce6164fb.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\dll.exe N/A

Looks up external IP address via web service

Description Indicator Process Target
N/A ip-api.com N/A N/A

Enumerates physical storage devices

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\dll.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Roaming\java\update.exe N/A

Suspicious use of SetWindowsHookEx

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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2028 wrote to memory of 2720 N/A C:\Users\Admin\AppData\Local\Temp\15570cfcccc4a0a7aacd356fce6164fb.exe C:\Users\Admin\AppData\Local\Temp\dll.exe
PID 2028 wrote to memory of 2720 N/A C:\Users\Admin\AppData\Local\Temp\15570cfcccc4a0a7aacd356fce6164fb.exe C:\Users\Admin\AppData\Local\Temp\dll.exe
PID 2028 wrote to memory of 2720 N/A C:\Users\Admin\AppData\Local\Temp\15570cfcccc4a0a7aacd356fce6164fb.exe C:\Users\Admin\AppData\Local\Temp\dll.exe
PID 2028 wrote to memory of 2720 N/A C:\Users\Admin\AppData\Local\Temp\15570cfcccc4a0a7aacd356fce6164fb.exe C:\Users\Admin\AppData\Local\Temp\dll.exe
PID 2720 wrote to memory of 2476 N/A C:\Users\Admin\AppData\Local\Temp\dll.exe C:\Users\Admin\AppData\Roaming\java\update.exe
PID 2720 wrote to memory of 2476 N/A C:\Users\Admin\AppData\Local\Temp\dll.exe C:\Users\Admin\AppData\Roaming\java\update.exe
PID 2720 wrote to memory of 2476 N/A C:\Users\Admin\AppData\Local\Temp\dll.exe C:\Users\Admin\AppData\Roaming\java\update.exe
PID 2720 wrote to memory of 2476 N/A C:\Users\Admin\AppData\Local\Temp\dll.exe C:\Users\Admin\AppData\Roaming\java\update.exe
PID 2720 wrote to memory of 2476 N/A C:\Users\Admin\AppData\Local\Temp\dll.exe C:\Users\Admin\AppData\Roaming\java\update.exe
PID 2720 wrote to memory of 2476 N/A C:\Users\Admin\AppData\Local\Temp\dll.exe C:\Users\Admin\AppData\Roaming\java\update.exe
PID 2720 wrote to memory of 2476 N/A C:\Users\Admin\AppData\Local\Temp\dll.exe C:\Users\Admin\AppData\Roaming\java\update.exe

Processes

C:\Users\Admin\AppData\Local\Temp\15570cfcccc4a0a7aacd356fce6164fb.exe

"C:\Users\Admin\AppData\Local\Temp\15570cfcccc4a0a7aacd356fce6164fb.exe"

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

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

C:\Users\Admin\AppData\Roaming\java\update.exe

"C:\Users\Admin\AppData\Roaming\java\update.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 ip-api.com udp
US 208.95.112.1:80 ip-api.com tcp
US 208.95.112.1:80 ip-api.com tcp
N/A 127.0.0.1:3329 tcp
N/A 127.0.0.1:3329 tcp
N/A 127.0.0.1:3329 tcp
N/A 127.0.0.1:3329 tcp
N/A 127.0.0.1:3329 tcp
N/A 127.0.0.1:3329 tcp
N/A 127.0.0.1:3329 tcp
N/A 127.0.0.1:3329 tcp
N/A 127.0.0.1:3329 tcp
N/A 127.0.0.1:3329 tcp
N/A 127.0.0.1:3329 tcp
N/A 127.0.0.1:3329 tcp
N/A 127.0.0.1:3329 tcp
N/A 127.0.0.1:3329 tcp
N/A 127.0.0.1:3329 tcp
N/A 127.0.0.1:3329 tcp
N/A 127.0.0.1:3329 tcp
N/A 127.0.0.1:3329 tcp
N/A 127.0.0.1:3329 tcp
N/A 127.0.0.1:3329 tcp
N/A 127.0.0.1:3329 tcp
N/A 127.0.0.1:3329 tcp

Files

memory/2028-0-0x0000000000370000-0x0000000000462000-memory.dmp

memory/2028-1-0x0000000074730000-0x0000000074E1E000-memory.dmp

memory/2028-2-0x00000000004A0000-0x00000000004E0000-memory.dmp

memory/2028-3-0x0000000074730000-0x0000000074E1E000-memory.dmp

memory/2028-4-0x00000000004A0000-0x00000000004E0000-memory.dmp

\Users\Admin\AppData\Local\Temp\dll.exe

MD5 bfe7498e7720c108ee3bb82e0b9fe7ee
SHA1 6e6222dc7bcae6d38b81078ba4099b7b8fb9a9fd
SHA256 e68e0f50fe6c139bbfe81f1680f9b8207dcef156993387dd4a450624558a515c
SHA512 5b62d69cc9879d99c56a85a45cf7e20458dedf97c88001e464f085dc2ef09391c50d9a3527caf88039466cd340a6adde2ed40f2d1ab95924a45eb0ae9129d324

memory/2720-12-0x0000000000E80000-0x0000000000EDE000-memory.dmp

memory/2720-13-0x0000000074730000-0x0000000074E1E000-memory.dmp

memory/2720-14-0x00000000044F0000-0x0000000004530000-memory.dmp

C:\Users\Admin\AppData\Roaming\java\update.exe

MD5 eeb1a66c44e401ae268fd5e8fd0dc377
SHA1 c22857dbcc2f5ae2d4d4bab1f596acdc8d332df4
SHA256 f07454793bf622a7d972cf1e901dd167d1045c027f8d61357026d0f942b63a36
SHA512 c32517fa10c3189fb93d554d81f74c78dc33f1ce4f161f1869244f0c8b108a5ed3236ad702039b484b5f0a4cedbf58d65443da697b16f20a912e71e4e6bc545b

memory/2720-21-0x0000000074730000-0x0000000074E1E000-memory.dmp

memory/2476-23-0x0000000000F80000-0x0000000000FDE000-memory.dmp

memory/2476-22-0x0000000074730000-0x0000000074E1E000-memory.dmp

memory/2476-24-0x0000000004B80000-0x0000000004BC0000-memory.dmp

memory/2476-26-0x0000000074730000-0x0000000074E1E000-memory.dmp

memory/2476-27-0x0000000004B80000-0x0000000004BC0000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2023-12-31 12:52

Reported

2024-01-04 18:06

Platform

win10v2004-20231215-en

Max time kernel

144s

Max time network

151s

Command Line

"C:\Users\Admin\AppData\Local\Temp\15570cfcccc4a0a7aacd356fce6164fb.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

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-768304381-2824894965-3840216961-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\15570cfcccc4a0a7aacd356fce6164fb.exe N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\dll.exe N/A

Looks up external IP address via web service

Description Indicator Process Target
N/A ip-api.com N/A N/A

Enumerates physical storage devices

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Roaming\java\update.exe N/A

Suspicious use of SetWindowsHookEx

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

Processes

C:\Users\Admin\AppData\Local\Temp\15570cfcccc4a0a7aacd356fce6164fb.exe

"C:\Users\Admin\AppData\Local\Temp\15570cfcccc4a0a7aacd356fce6164fb.exe"

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

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

C:\Users\Admin\AppData\Roaming\java\update.exe

"C:\Users\Admin\AppData\Roaming\java\update.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 1.181.190.20.in-addr.arpa udp
US 8.8.8.8:53 g.bing.com udp
US 204.79.197.200:443 g.bing.com tcp
US 8.8.8.8:53 158.240.127.40.in-addr.arpa udp
US 8.8.8.8:53 200.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 41.134.221.88.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 2.136.104.51.in-addr.arpa udp
US 8.8.8.8:53 241.154.82.20.in-addr.arpa udp
US 8.8.8.8:53 26.165.165.52.in-addr.arpa udp
US 8.8.8.8:53 2.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 11.2.37.23.in-addr.arpa udp
US 8.8.8.8:53 ip-api.com udp
US 208.95.112.1:80 ip-api.com tcp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 8.8.8.8:53 9.228.82.20.in-addr.arpa udp
US 8.8.8.8:53 1.112.95.208.in-addr.arpa udp
US 208.95.112.1:80 ip-api.com tcp
US 8.8.8.8:53 18.134.221.88.in-addr.arpa udp
N/A 127.0.0.1:3329 tcp
N/A 127.0.0.1:3329 tcp
N/A 127.0.0.1:3329 tcp
US 8.8.8.8:53 100.5.17.2.in-addr.arpa udp
US 8.8.8.8:53 119.110.54.20.in-addr.arpa udp
US 8.8.8.8:53 150.1.37.23.in-addr.arpa udp
N/A 127.0.0.1:3329 tcp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 232.135.221.88.in-addr.arpa udp
N/A 127.0.0.1:3329 tcp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
US 8.8.8.8:53 202.135.221.88.in-addr.arpa udp
US 8.8.8.8:53 43.134.221.88.in-addr.arpa udp
N/A 127.0.0.1:3329 tcp
N/A 127.0.0.1:3329 tcp
N/A 127.0.0.1:3329 tcp
N/A 127.0.0.1:3329 tcp
US 8.8.8.8:53 19.229.111.52.in-addr.arpa udp
N/A 127.0.0.1:3329 tcp
N/A 127.0.0.1:3329 tcp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 8.8.8.8:53 43.58.199.20.in-addr.arpa udp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
N/A 127.0.0.1:3329 tcp
N/A 127.0.0.1:3329 tcp
N/A 127.0.0.1:3329 tcp
N/A 127.0.0.1:3329 tcp
N/A 127.0.0.1:3329 tcp
N/A 127.0.0.1:3329 tcp
N/A 127.0.0.1:3329 tcp
N/A 127.0.0.1:3329 tcp

Files

memory/1428-1-0x00000000750D0000-0x0000000075880000-memory.dmp

memory/1428-0-0x00000000001D0000-0x00000000002C2000-memory.dmp

memory/1428-2-0x0000000005340000-0x00000000058E4000-memory.dmp

memory/1428-3-0x0000000004D90000-0x0000000004E22000-memory.dmp

memory/1428-4-0x0000000004C90000-0x0000000004CA0000-memory.dmp

memory/1428-5-0x0000000004CD0000-0x0000000004CDA000-memory.dmp

memory/1428-6-0x0000000006360000-0x00000000063FC000-memory.dmp

memory/1428-7-0x00000000750D0000-0x0000000075880000-memory.dmp

memory/1428-8-0x0000000004C90000-0x0000000004CA0000-memory.dmp

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

MD5 bfe7498e7720c108ee3bb82e0b9fe7ee
SHA1 6e6222dc7bcae6d38b81078ba4099b7b8fb9a9fd
SHA256 e68e0f50fe6c139bbfe81f1680f9b8207dcef156993387dd4a450624558a515c
SHA512 5b62d69cc9879d99c56a85a45cf7e20458dedf97c88001e464f085dc2ef09391c50d9a3527caf88039466cd340a6adde2ed40f2d1ab95924a45eb0ae9129d324

memory/3304-20-0x00000000750D0000-0x0000000075880000-memory.dmp

memory/2160-19-0x000000006FCE0000-0x000000006FCF2000-memory.dmp

memory/3304-21-0x0000000000BC0000-0x0000000000C1E000-memory.dmp

memory/3304-22-0x0000000003000000-0x0000000003010000-memory.dmp

memory/3304-23-0x00000000055D0000-0x0000000005636000-memory.dmp

memory/3304-24-0x0000000005B40000-0x0000000005B52000-memory.dmp

memory/3304-25-0x0000000006830000-0x000000000686C000-memory.dmp

memory/3304-27-0x00000000750D0000-0x0000000075880000-memory.dmp

memory/3304-28-0x0000000003000000-0x0000000003010000-memory.dmp