quasar | 54718ab7a93e2a2a00e355a58dfa1d4700ec08e925703bb72d7a25dd01973e9a

Analysis

max time kernel
145s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
07/11/2024, 01:55

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General

Target

file.exe
Size

2.2MB
MD5

ebbb525d514b2725487ea56391c67268
SHA1

2e4a7ca7d6029750336a59531fa92bb863200c8d
SHA256

54718ab7a93e2a2a00e355a58dfa1d4700ec08e925703bb72d7a25dd01973e9a
SHA512

b645c9b13ccd96f7fc02b5eccf6f11930baa28c174efb061c55742044e9d8079fc5d8d271b006f8c6369ac573dc7f4d222aa0d5c3e54f9ca78338f083ee546dd
SSDEEP

49152:Gll+JYqBe/XaZ9VMaAsRr1CwHLSJ1xGpocF8oWrwOcbRKF6Buu0:NJ1YXw11CwHLY1YOo4wBg

Score

10^/10

quasar office04 discovery spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

162.230.48.189:4782

Mutex

b739d9d4-46e7-4623-b745-58f79e3de3da

Attributes

encryption_key
1101B928CCB2F89CEEC9E5352468A3EF026F77D5
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Quasar Client Startup
subdirectory
SubDir

Signatures

Quasar RAT
Quasar is an open source Remote Access Tool.
trojan spyware quasar
Quasar family
quasar

Quasar payload 1 IoCs

resource	yara_rule
behavioral2/memory/2592-1097-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar

Suspicious use of NtCreateUserProcessOtherParentProcess 1 IoCs

description	pid	Process	procid_target
PID 3224 created 3528	3224	file.exe	56

Drops startup file 1 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\CountOut.vbs	file.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3224 set thread context of 2592	3224	file.exe	99

System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	InstallUtil.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	file.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3224	file.exe
3224	file.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	3224	file.exe
Token: SeDebugPrivilege	3224	file.exe
Token: SeDebugPrivilege	2592	InstallUtil.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2592	InstallUtil.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
2592	InstallUtil.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 3224 wrote to memory of 2592	3224	file.exe	99
PID 3224 wrote to memory of 2592	3224	file.exe	99
PID 3224 wrote to memory of 2592	3224	file.exe	99
PID 3224 wrote to memory of 2592	3224	file.exe	99
PID 3224 wrote to memory of 2592	3224	file.exe	99
PID 3224 wrote to memory of 2592	3224	file.exe	99
PID 3224 wrote to memory of 2592	3224	file.exe	99
PID 3224 wrote to memory of 2592	3224	file.exe	99

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:3528
- C:\Users\Admin\AppData\Local\Temp\file.exe
  "C:\Users\Admin\AppData\Local\Temp\file.exe"
  2⤵
  - Suspicious use of NtCreateUserProcessOtherParentProcess
  - Drops startup file
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3224
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  PID:2592

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/2592-1097-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/2592-1098-0x0000000074ED0000-0x0000000075680000-memory.dmp

Filesize
7.7MB

Download
memory/2592-1099-0x0000000074ED0000-0x0000000075680000-memory.dmp

Filesize
7.7MB

Download
memory/2592-1100-0x0000000005400000-0x000000000540A000-memory.dmp

Filesize
40KB

Download
memory/2592-1101-0x0000000006970000-0x0000000006F88000-memory.dmp

Filesize
6.1MB

Download
memory/2592-1104-0x0000000074ED0000-0x0000000075680000-memory.dmp

Filesize
7.7MB

Download
memory/2592-1103-0x0000000006760000-0x0000000006812000-memory.dmp

Filesize
712KB

Download
memory/2592-1102-0x0000000006500000-0x0000000006550000-memory.dmp

Filesize
320KB

Download
memory/3224-24-0x00000000067F0000-0x00000000069F6000-memory.dmp

Filesize
2.0MB

Download
memory/3224-12-0x00000000067F0000-0x00000000069F6000-memory.dmp

Filesize
2.0MB

Download
memory/3224-5-0x0000000006FD0000-0x0000000007574000-memory.dmp

Filesize
5.6MB

Download
memory/3224-6-0x0000000006B20000-0x0000000006BB2000-memory.dmp

Filesize
584KB

Download
memory/3224-7-0x00000000067F0000-0x00000000069F6000-memory.dmp

Filesize
2.0MB

Download
memory/3224-8-0x00000000067F0000-0x00000000069F6000-memory.dmp

Filesize
2.0MB

Download
memory/3224-42-0x00000000067F0000-0x00000000069F6000-memory.dmp

Filesize
2.0MB

Download
memory/3224-50-0x00000000067F0000-0x00000000069F6000-memory.dmp

Filesize
2.0MB

Download
memory/3224-52-0x00000000067F0000-0x00000000069F6000-memory.dmp

Filesize
2.0MB

Download
memory/3224-48-0x00000000067F0000-0x00000000069F6000-memory.dmp

Filesize
2.0MB

Download
memory/3224-46-0x00000000067F0000-0x00000000069F6000-memory.dmp

Filesize
2.0MB

Download
memory/3224-44-0x00000000067F0000-0x00000000069F6000-memory.dmp

Filesize
2.0MB

Download
memory/3224-40-0x00000000067F0000-0x00000000069F6000-memory.dmp

Filesize
2.0MB

Download
memory/3224-38-0x00000000067F0000-0x00000000069F6000-memory.dmp

Filesize
2.0MB

Download
memory/3224-36-0x00000000067F0000-0x00000000069F6000-memory.dmp

Filesize
2.0MB

Download
memory/3224-32-0x00000000067F0000-0x00000000069F6000-memory.dmp

Filesize
2.0MB

Download
memory/3224-30-0x00000000067F0000-0x00000000069F6000-memory.dmp

Filesize
2.0MB

Download
memory/3224-28-0x00000000067F0000-0x00000000069F6000-memory.dmp

Filesize
2.0MB

Download
memory/3224-34-0x00000000067F0000-0x00000000069F6000-memory.dmp

Filesize
2.0MB

Download
memory/3224-26-0x00000000067F0000-0x00000000069F6000-memory.dmp

Filesize
2.0MB

Download
memory/3224-3-0x00000000054B0000-0x00000000056BC000-memory.dmp

Filesize
2.0MB

Download
memory/3224-20-0x00000000067F0000-0x00000000069F6000-memory.dmp

Filesize
2.0MB

Download
memory/3224-18-0x00000000067F0000-0x00000000069F6000-memory.dmp

Filesize
2.0MB

Download
memory/3224-16-0x00000000067F0000-0x00000000069F6000-memory.dmp

Filesize
2.0MB

Download
memory/3224-14-0x00000000067F0000-0x00000000069F6000-memory.dmp

Filesize
2.0MB

Download
memory/3224-4-0x00000000067F0000-0x00000000069FC000-memory.dmp

Filesize
2.0MB

Download
memory/3224-22-0x00000000067F0000-0x00000000069F6000-memory.dmp

Filesize
2.0MB

Download
memory/3224-10-0x00000000067F0000-0x00000000069F6000-memory.dmp

Filesize
2.0MB

Download
memory/3224-60-0x00000000067F0000-0x00000000069F6000-memory.dmp

Filesize
2.0MB

Download
memory/3224-63-0x00000000067F0000-0x00000000069F6000-memory.dmp

Filesize
2.0MB

Download
memory/3224-70-0x00000000067F0000-0x00000000069F6000-memory.dmp

Filesize
2.0MB

Download
memory/3224-68-0x00000000067F0000-0x00000000069F6000-memory.dmp

Filesize
2.0MB

Download
memory/3224-66-0x00000000067F0000-0x00000000069F6000-memory.dmp

Filesize
2.0MB

Download
memory/3224-58-0x00000000067F0000-0x00000000069F6000-memory.dmp

Filesize
2.0MB

Download
memory/3224-56-0x00000000067F0000-0x00000000069F6000-memory.dmp

Filesize
2.0MB

Download
memory/3224-54-0x00000000067F0000-0x00000000069F6000-memory.dmp

Filesize
2.0MB

Download
memory/3224-64-0x00000000067F0000-0x00000000069F6000-memory.dmp

Filesize
2.0MB

Download
memory/3224-1081-0x0000000074ED0000-0x0000000075680000-memory.dmp

Filesize
7.7MB

Download
memory/3224-1082-0x00000000057F0000-0x000000000596E000-memory.dmp

Filesize
1.5MB

Download
memory/3224-1083-0x00000000056C0000-0x000000000570C000-memory.dmp

Filesize
304KB

Download
memory/3224-1087-0x0000000074ED0000-0x0000000075680000-memory.dmp

Filesize
7.7MB

Download
memory/3224-1089-0x0000000074ED0000-0x0000000075680000-memory.dmp

Filesize
7.7MB

Download
memory/3224-1088-0x0000000074ED0000-0x0000000075680000-memory.dmp

Filesize
7.7MB

Download
memory/3224-2-0x0000000074ED0000-0x0000000075680000-memory.dmp

Filesize
7.7MB

Download
memory/3224-1-0x0000000000650000-0x000000000088C000-memory.dmp

Filesize
2.2MB

Download
memory/3224-0-0x0000000074EDE000-0x0000000074EDF000-memory.dmp

Filesize
4KB

Download
memory/3224-1090-0x0000000074EDE000-0x0000000074EDF000-memory.dmp

Filesize
4KB

Download
memory/3224-1091-0x0000000074ED0000-0x0000000075680000-memory.dmp

Filesize
7.7MB

Download
memory/3224-1092-0x0000000005760000-0x00000000057B4000-memory.dmp

Filesize
336KB

Download
memory/3224-1096-0x0000000074ED0000-0x0000000075680000-memory.dmp

Filesize
7.7MB

Download