quasar | f9fc23fe47d3c918c7bc24cbe14e56d9b0024e31660f2a280f3991291b3e5882

Analysis

max time kernel
149s
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
31-01-2025 08:48

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General

Target

win64_svchost.exe
Size

3.2MB
MD5

f31a91bff6bb5805f4f7b95c0a27cb2a
SHA1

8eeef2262c4288c035d7be99f27ce478dae008ce
SHA256

f9fc23fe47d3c918c7bc24cbe14e56d9b0024e31660f2a280f3991291b3e5882
SHA512

07f750faf48ef505de12a07acf64136468702ba07d7b5ec9ecbc3d2f6e5c04c3c7ce0ff4b178c5f2f3a1df2b9b0ea8f54687f90137fa58603ddd0896733eaacb
SSDEEP

98304:p1AhvWM65Mf9cZR4FklYJr41ADevpgaSoJxqGT4q:WvWM6iGKkCJ0GevCaXsi4q

Score

10^/10

quasar svhost32 discovery execution spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

svhost32

185.147.125.77:4782

Mutex

9500f2e5-aa22-4d12-a2ea-09ddc5050666

Attributes

encryption_key
BD29CA798222621C677ECD67804E6D9D0A95CFCB
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/924-83-0x000000001C830000-0x000000001CB54000-memory.dmp	family_quasar

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-4089630652-1596403869-279772308-1000\Control Panel\International\Geo\Nation	win64_svchost.tmp

Executes dropped EXE 2 IoCs

pid	Process
4632	win64_svchost.tmp
2680	win64_svchost.tmp

Loads dropped DLL 8 IoCs

pid	Process
4632	win64_svchost.tmp
4632	win64_svchost.tmp
2680	win64_svchost.tmp
2680	win64_svchost.tmp
4732	regsvr32.exe
924	regsvr32.exe
4584	regsvr32.EXE
4880	regsvr32.EXE

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Command and Scripting Interpreter: PowerShell 1 TTPs 5 IoCs

Run Powershell to execute payload.

execution

PowerShell

T1059.001

pid	Process
3624	powershell.exe
2068	powershell.exe
4592	powershell.exe
3460	powershell.exe
2068	powershell.exe

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 5 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	regsvr32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	win64_svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	win64_svchost.tmp
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	win64_svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	win64_svchost.tmp

Suspicious behavior: EnumeratesProcesses 22 IoCs

pid	Process
2680	win64_svchost.tmp
2680	win64_svchost.tmp
924	regsvr32.exe
924	regsvr32.exe
3624	powershell.exe
3624	powershell.exe
2068	powershell.exe
2068	powershell.exe
924	regsvr32.exe
924	regsvr32.exe
4584	regsvr32.EXE
4584	regsvr32.EXE
4592	powershell.exe
4592	powershell.exe
4584	regsvr32.EXE
4584	regsvr32.EXE
4880	regsvr32.EXE
4880	regsvr32.EXE
3460	powershell.exe
3460	powershell.exe
4880	regsvr32.EXE
4880	regsvr32.EXE

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	3624	powershell.exe
Token: SeIncreaseQuotaPrivilege	3624	powershell.exe
Token: SeSecurityPrivilege	3624	powershell.exe
Token: SeTakeOwnershipPrivilege	3624	powershell.exe
Token: SeLoadDriverPrivilege	3624	powershell.exe
Token: SeSystemProfilePrivilege	3624	powershell.exe
Token: SeSystemtimePrivilege	3624	powershell.exe
Token: SeProfSingleProcessPrivilege	3624	powershell.exe
Token: SeIncBasePriorityPrivilege	3624	powershell.exe
Token: SeCreatePagefilePrivilege	3624	powershell.exe
Token: SeBackupPrivilege	3624	powershell.exe
Token: SeRestorePrivilege	3624	powershell.exe
Token: SeShutdownPrivilege	3624	powershell.exe
Token: SeDebugPrivilege	3624	powershell.exe
Token: SeSystemEnvironmentPrivilege	3624	powershell.exe
Token: SeRemoteShutdownPrivilege	3624	powershell.exe
Token: SeUndockPrivilege	3624	powershell.exe
Token: SeManageVolumePrivilege	3624	powershell.exe
Token: 33	3624	powershell.exe
Token: 34	3624	powershell.exe
Token: 35	3624	powershell.exe
Token: 36	3624	powershell.exe
Token: SeDebugPrivilege	2068	powershell.exe
Token: SeIncreaseQuotaPrivilege	2068	powershell.exe
Token: SeSecurityPrivilege	2068	powershell.exe
Token: SeTakeOwnershipPrivilege	2068	powershell.exe
Token: SeLoadDriverPrivilege	2068	powershell.exe
Token: SeSystemProfilePrivilege	2068	powershell.exe
Token: SeSystemtimePrivilege	2068	powershell.exe
Token: SeProfSingleProcessPrivilege	2068	powershell.exe
Token: SeIncBasePriorityPrivilege	2068	powershell.exe
Token: SeCreatePagefilePrivilege	2068	powershell.exe
Token: SeBackupPrivilege	2068	powershell.exe
Token: SeRestorePrivilege	2068	powershell.exe
Token: SeShutdownPrivilege	2068	powershell.exe
Token: SeDebugPrivilege	2068	powershell.exe
Token: SeSystemEnvironmentPrivilege	2068	powershell.exe
Token: SeRemoteShutdownPrivilege	2068	powershell.exe
Token: SeUndockPrivilege	2068	powershell.exe
Token: SeManageVolumePrivilege	2068	powershell.exe
Token: 33	2068	powershell.exe
Token: 34	2068	powershell.exe
Token: 35	2068	powershell.exe
Token: 36	2068	powershell.exe
Token: SeIncreaseQuotaPrivilege	2068	powershell.exe
Token: SeSecurityPrivilege	2068	powershell.exe
Token: SeTakeOwnershipPrivilege	2068	powershell.exe
Token: SeLoadDriverPrivilege	2068	powershell.exe
Token: SeSystemProfilePrivilege	2068	powershell.exe
Token: SeSystemtimePrivilege	2068	powershell.exe
Token: SeProfSingleProcessPrivilege	2068	powershell.exe
Token: SeIncBasePriorityPrivilege	2068	powershell.exe
Token: SeCreatePagefilePrivilege	2068	powershell.exe
Token: SeBackupPrivilege	2068	powershell.exe
Token: SeRestorePrivilege	2068	powershell.exe
Token: SeShutdownPrivilege	2068	powershell.exe
Token: SeDebugPrivilege	2068	powershell.exe
Token: SeSystemEnvironmentPrivilege	2068	powershell.exe
Token: SeRemoteShutdownPrivilege	2068	powershell.exe
Token: SeUndockPrivilege	2068	powershell.exe
Token: SeManageVolumePrivilege	2068	powershell.exe
Token: 33	2068	powershell.exe
Token: 34	2068	powershell.exe
Token: 35	2068	powershell.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2680	win64_svchost.tmp

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
924	regsvr32.exe

Suspicious use of WriteProcessMemory 22 IoCs

description	pid	Process	procid_target
PID 2868 wrote to memory of 4632	2868	win64_svchost.exe	82
PID 2868 wrote to memory of 4632	2868	win64_svchost.exe	82
PID 2868 wrote to memory of 4632	2868	win64_svchost.exe	82
PID 4632 wrote to memory of 1396	4632	win64_svchost.tmp	83
PID 4632 wrote to memory of 1396	4632	win64_svchost.tmp	83
PID 4632 wrote to memory of 1396	4632	win64_svchost.tmp	83
PID 1396 wrote to memory of 2680	1396	win64_svchost.exe	84
PID 1396 wrote to memory of 2680	1396	win64_svchost.exe	84
PID 1396 wrote to memory of 2680	1396	win64_svchost.exe	84
PID 2680 wrote to memory of 4732	2680	win64_svchost.tmp	85
PID 2680 wrote to memory of 4732	2680	win64_svchost.tmp	85
PID 2680 wrote to memory of 4732	2680	win64_svchost.tmp	85
PID 4732 wrote to memory of 924	4732	regsvr32.exe	86
PID 4732 wrote to memory of 924	4732	regsvr32.exe	86
PID 924 wrote to memory of 3624	924	regsvr32.exe	87
PID 924 wrote to memory of 3624	924	regsvr32.exe	87
PID 924 wrote to memory of 2068	924	regsvr32.exe	90
PID 924 wrote to memory of 2068	924	regsvr32.exe	90
PID 4584 wrote to memory of 4592	4584	regsvr32.EXE	101
PID 4584 wrote to memory of 4592	4584	regsvr32.EXE	101
PID 4880 wrote to memory of 3460	4880	regsvr32.EXE	104
PID 4880 wrote to memory of 3460	4880	regsvr32.EXE	104

C:\Users\Admin\AppData\Local\Temp\win64_svchost.exe
"C:\Users\Admin\AppData\Local\Temp\win64_svchost.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2868
- C:\Users\Admin\AppData\Local\Temp\is-88C49.tmp\win64_svchost.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-88C49.tmp\win64_svchost.tmp" /SL5="$60062,2958433,245248,C:\Users\Admin\AppData\Local\Temp\win64_svchost.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4632
- - C:\Users\Admin\AppData\Local\Temp\win64_svchost.exe
    "C:\Users\Admin\AppData\Local\Temp\win64_svchost.exe" /VERYSILENT
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:1396
  - - C:\Users\Admin\AppData\Local\Temp\is-PMQGP.tmp\win64_svchost.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-PMQGP.tmp\win64_svchost.tmp" /SL5="$90040,2958433,245248,C:\Users\Admin\AppData\Local\Temp\win64_svchost.exe" /VERYSILENT
      4⤵
      Executes dropped EXE
      Loads dropped DLL
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of FindShellTrayWindow
      Suspicious use of WriteProcessMemory
      PID:2680
    - - C:\Windows\SysWOW64\regsvr32.exe
        
        "regsvr32.exe" /s /i:SYNC "C:\Users\Admin\AppData\Roaming\\7ntdll.drv"
        5⤵
        Loads dropped DLL
        System Location Discovery: System Language Discovery
        Suspicious use of WriteProcessMemory
        
        PID:4732
      - C:\Windows\system32\regsvr32.exe
        
        /s /i:SYNC "C:\Users\Admin\AppData\Roaming\\7ntdll.drv"
        6⤵
        Loads dropped DLL
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of SetWindowsHookEx
        Suspicious use of WriteProcessMemory
        
        PID:924
        
        C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        
        "powershell" -Command "if (Get-ScheduledTask | Where-Object { $_.Actions.Execute -eq 'regsvr32' -and $_.Actions.Arguments -eq '/S /i:SYNC C:\Users\Admin\AppData\Roaming\7ntdll.drv' }) { exit 0 } else { exit 1 }"
        7⤵
        Command and Scripting Interpreter: PowerShell
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:3624
        
        C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        
        "powershell" "Register-ScheduledTask -Action (New-ScheduledTaskAction -Execute \"regsvr32\" -Argument \"/S /i:SYNC C:\Users\Admin\AppData\Roaming\7ntdll.drv\") -Trigger (New-ScheduledTaskTrigger -Once -At (Get-Date).AddMinutes(1) -RepetitionInterval (New-TimeSpan -Minutes 1)) -TaskName 'MicrosoftEdgeUpdateTaskMachineUA{8E83665E-3E85-4998-A803-B561218D5458}' -Description 'MicrosoftEdgeUpdateTaskMachineUA' -Settings (New-ScheduledTaskSettingsSet -AllowStartIfOnBatteries -DontStopIfGoingOnBatteries -ExecutionTimeLimit 0) -RunLevel Highest"
        7⤵
        Command and Scripting Interpreter: PowerShell
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:2068

C:\Windows\system32\regsvr32.EXE
C:\Windows\system32\regsvr32.EXE /S /i:SYNC C:\Users\Admin\AppData\Roaming\7ntdll.drv
1⤵
- Loads dropped DLL
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4584
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell" -Command "if (Get-ScheduledTask | Where-Object { $_.Actions.Execute -eq 'regsvr32' -and $_.Actions.Arguments -eq '/S /i:SYNC C:\Users\Admin\AppData\Roaming\7ntdll.drv' }) { exit 0 } else { exit 1 }"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  PID:4592

C:\Windows\system32\regsvr32.EXE
C:\Windows\system32\regsvr32.EXE /S /i:SYNC C:\Users\Admin\AppData\Roaming\7ntdll.drv
1⤵
- Loads dropped DLL
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4880
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell" -Command "if (Get-ScheduledTask | Where-Object { $_.Actions.Execute -eq 'regsvr32' -and $_.Actions.Arguments -eq '/S /i:SYNC C:\Users\Admin\AppData\Roaming\7ntdll.drv' }) { exit 0 } else { exit 1 }"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  PID:3460

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

Filesize
3KB

MD5
3ffce848af907464c20a20e1b430f78a

SHA1
fbcd91a5c226d474235be920cf49e3344893fc1f

SHA256
25213a6685a6fd21a2aa43c417891703333579ad784f3896976b44bcfcdb009e

SHA512
1adaf6d68441a32b459b6071dcfdae404ab1e37bb0c6511e08d49717f9043679bdd7ca3324be184ece522e6516eedc04203ffccb5f9ea790bd35a84db9b944bf

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
1KB

MD5
f25c85b2bb354d280391b5de0f2e74e6

SHA1
8255ba9443f52eaee33c1483e4b00217bcc0bed6

SHA256
59d0837a17ff3728035f1b7d7a6be1410cb76796ad4e9c261ec5334d751a8f3b

SHA512
927c91edc8ae45c3136ba2bf5cf640abaabd08472f390cebaf1f1edcf084217ed370bbcebf675010a207ebed1105ff6fd02c4865848f3180a6cc616d3b56b2e4

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
1KB

MD5
a4041ced69ac0cddcff4b3bd4f83b8d6

SHA1
096dd280578200957d143f8d7963acae3b8819d4

SHA256
a4bd8860c45b7fffa71e7a1aa43072b8c10f318f8cbc53e963602a3bfd777823

SHA512
43f57a4381713c9401bbbba554979c895cbc55825d5fb3fa7b2c3a7700b809444b8d9eb26db474855ae8037fb0be24d1de51e86c81e18268593d8610a6621c0a

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
1KB

MD5
00068d34580ca0b4e186c4a6f303b09e

SHA1
59fe7294b796d4848709b32042246f1bb73acfab

SHA256
68f5b87085e5d444e29c42f79d24740e03f6658edb8bd2230cce896aac871fa6

SHA512
96359172ef18684d8b81977a3d79246427ce0b328e160f2e8b548b338feb081817293b04593960f679915c42a5b86255b30f5b56d06318de8dcb4e77e9d277ea

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_vba3l00l.ppc.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-88C49.tmp\win64_svchost.tmp

Filesize
1.2MB

MD5
70fcedd0d46d1c97af8e3eb4868c5bf1

SHA1
42ae1e3080be4720fc1bb97ef63d59f2f26e1558

SHA256
fcae74ccb09740303d86a88dd07db209721458e8eb48697f1c7d666a67dd5a07

SHA512
2cc42882fbdcd3d8bc4c3caa2116b76bd65fccff35e6058cfe67a80a307251b77bcbf17ddbd51e9d566f6810ac95ea33848da2a733cab6135d399dfaaf0c1020

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-ACF2J.tmp\_isetup\_shfoldr.dll

Filesize
22KB

MD5
92dc6ef532fbb4a5c3201469a5b5eb63

SHA1
3e89ff837147c16b4e41c30d6c796374e0b8e62c

SHA256
9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

SHA512
9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-R325O.tmp\_isetup\_isdecmp.dll

Filesize
13KB

MD5
a813d18268affd4763dde940246dc7e5

SHA1
c7366e1fd925c17cc6068001bd38eaef5b42852f

SHA256
e19781aabe466dd8779cb9c8fa41bbb73375447066bb34e876cf388a6ed63c64

SHA512
b310ed4cd2e94381c00a6a370fcb7cc867ebe425d705b69caaaaffdafbab91f72d357966916053e72e68ecf712f2af7585500c58bb53ec3e1d539179fcb45fb4

Download Submit
C:\Users\Admin\AppData\Roaming\7ntdll.drv

Filesize
4.2MB

MD5
0964f6b8db5ffcd0f8817a752ab91fc0

SHA1
1c625ee61cff5f030d080e8124b134542e1ceae7

SHA256
5f69aad1615fa97e4204b25c0bdcab15bc009f4368d8e15981dfbd3b1bb5f8f0

SHA512
2428f2dca314526df68ac5c3e142fc114166f2301d15aa5da5e9c2cdca2071709e806bcc94790f665fdd77d454107a0786f5314bcdedf4ce01280af729e568b6

Download Submit
memory/924-83-0x000000001C830000-0x000000001CB54000-memory.dmp

Filesize
3.1MB

Download
memory/924-84-0x000000001D400000-0x000000001D450000-memory.dmp

Filesize
320KB

Download
memory/924-86-0x00007FFB85420000-0x00007FFB8586C000-memory.dmp

Filesize
4.3MB

Download
memory/924-85-0x000000001D510000-0x000000001D5C2000-memory.dmp

Filesize
712KB

Download
memory/1396-55-0x0000000000400000-0x0000000000446000-memory.dmp

Filesize
280KB

Download
memory/1396-23-0x0000000000400000-0x0000000000446000-memory.dmp

Filesize
280KB

Download
memory/1396-21-0x0000000000400000-0x0000000000446000-memory.dmp

Filesize
280KB

Download
memory/2680-32-0x0000000000400000-0x0000000000541000-memory.dmp

Filesize
1.3MB

Download
memory/2680-51-0x0000000000400000-0x0000000000541000-memory.dmp

Filesize
1.3MB

Download
memory/2868-0-0x0000000000400000-0x0000000000446000-memory.dmp

Filesize
280KB

Download
memory/2868-27-0x0000000000400000-0x0000000000446000-memory.dmp

Filesize
280KB

Download
memory/2868-2-0x0000000000401000-0x0000000000417000-memory.dmp

Filesize
88KB

Download
memory/3624-57-0x0000020DD19A0000-0x0000020DD19C2000-memory.dmp

Filesize
136KB

Download
memory/4584-104-0x00007FFB85420000-0x00007FFB8586C000-memory.dmp

Filesize
4.3MB

Download
memory/4632-26-0x0000000000400000-0x0000000000541000-memory.dmp

Filesize
1.3MB

Download
memory/4632-7-0x0000000000400000-0x0000000000541000-memory.dmp

Filesize
1.3MB

Download
memory/4880-123-0x00007FFB85420000-0x00007FFB8586C000-memory.dmp

Filesize
4.3MB

Download