quasar | 616bbced150df4c538374a032a176e88165f5e95f3fffaeae28ffa68cda552a1

Analysis

max time kernel
142s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20250129-en
resource tags

arch:x64arch:x86image:win10v2004-20250129-enlocale:en-usos:windows10-2004-x64system
submitted
30-01-2025 04:23

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

random.exe
Size

2.6MB
MD5

6416961fe33e1461e8f5c455c2cf0ec9
SHA1

190754691dffb4d873bd32f48722d150d338f51d
SHA256

616bbced150df4c538374a032a176e88165f5e95f3fffaeae28ffa68cda552a1
SHA512

8fe2fa84a62cf92d1136110e0b39bfb7f07646816ff9d9944a0d8523d26d2f2d46653ec2a9f1153fac6b3c585e0f742753959d496cab1f5a62c761dd0db1fc18
SSDEEP

49152:Ux8Gt7KDrJd8spKaFxZWVAItl6dXg84Hk6BOUjbqmQnN/DAP8khk2d4zV:C974P57k6dQ8bIO2uN/DAP8khkj

Score

10^/10

quasar 1 discovery execution spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

87.228.57.81:4782

Mutex

f832b3aa-9229-4dd0-81ec-c101146b1831

Attributes

encryption_key
19A0FAF8459F69650B5965C225752D425C429EEC
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/3796-81-0x000000001B490000-0x000000001B7B4000-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-1-5-21-2211717155-842865201-3404093980-1000\Control Panel\International\Geo\Nation	random.tmp

Executes dropped EXE 2 IoCs

pid	Process
4496	random.tmp
2868	random.tmp

Loads dropped DLL 8 IoCs

pid	Process
4496	random.tmp
4496	random.tmp
2868	random.tmp
2868	random.tmp
4936	regsvr32.exe
3796	regsvr32.exe
1092	regsvr32.EXE
2100	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
2496	powershell.exe
2364	powershell.exe
1560	powershell.exe
4140	powershell.exe
2364	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	random.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	random.tmp
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	random.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	random.tmp
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	regsvr32.exe

Suspicious behavior: EnumeratesProcesses 22 IoCs

pid	Process
2868	random.tmp
2868	random.tmp
3796	regsvr32.exe
3796	regsvr32.exe
2496	powershell.exe
2496	powershell.exe
2364	powershell.exe
2364	powershell.exe
3796	regsvr32.exe
3796	regsvr32.exe
1092	regsvr32.EXE
1092	regsvr32.EXE
1560	powershell.exe
1560	powershell.exe
1092	regsvr32.EXE
1092	regsvr32.EXE
2100	regsvr32.EXE
2100	regsvr32.EXE
4140	powershell.exe
4140	powershell.exe
2100	regsvr32.EXE
2100	regsvr32.EXE

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2496	powershell.exe
Token: SeIncreaseQuotaPrivilege	2496	powershell.exe
Token: SeSecurityPrivilege	2496	powershell.exe
Token: SeTakeOwnershipPrivilege	2496	powershell.exe
Token: SeLoadDriverPrivilege	2496	powershell.exe
Token: SeSystemProfilePrivilege	2496	powershell.exe
Token: SeSystemtimePrivilege	2496	powershell.exe
Token: SeProfSingleProcessPrivilege	2496	powershell.exe
Token: SeIncBasePriorityPrivilege	2496	powershell.exe
Token: SeCreatePagefilePrivilege	2496	powershell.exe
Token: SeBackupPrivilege	2496	powershell.exe
Token: SeRestorePrivilege	2496	powershell.exe
Token: SeShutdownPrivilege	2496	powershell.exe
Token: SeDebugPrivilege	2496	powershell.exe
Token: SeSystemEnvironmentPrivilege	2496	powershell.exe
Token: SeRemoteShutdownPrivilege	2496	powershell.exe
Token: SeUndockPrivilege	2496	powershell.exe
Token: SeManageVolumePrivilege	2496	powershell.exe
Token: 33	2496	powershell.exe
Token: 34	2496	powershell.exe
Token: 35	2496	powershell.exe
Token: 36	2496	powershell.exe
Token: SeDebugPrivilege	2364	powershell.exe
Token: SeIncreaseQuotaPrivilege	2364	powershell.exe
Token: SeSecurityPrivilege	2364	powershell.exe
Token: SeTakeOwnershipPrivilege	2364	powershell.exe
Token: SeLoadDriverPrivilege	2364	powershell.exe
Token: SeSystemProfilePrivilege	2364	powershell.exe
Token: SeSystemtimePrivilege	2364	powershell.exe
Token: SeProfSingleProcessPrivilege	2364	powershell.exe
Token: SeIncBasePriorityPrivilege	2364	powershell.exe
Token: SeCreatePagefilePrivilege	2364	powershell.exe
Token: SeBackupPrivilege	2364	powershell.exe
Token: SeRestorePrivilege	2364	powershell.exe
Token: SeShutdownPrivilege	2364	powershell.exe
Token: SeDebugPrivilege	2364	powershell.exe
Token: SeSystemEnvironmentPrivilege	2364	powershell.exe
Token: SeRemoteShutdownPrivilege	2364	powershell.exe
Token: SeUndockPrivilege	2364	powershell.exe
Token: SeManageVolumePrivilege	2364	powershell.exe
Token: 33	2364	powershell.exe
Token: 34	2364	powershell.exe
Token: 35	2364	powershell.exe
Token: 36	2364	powershell.exe
Token: SeIncreaseQuotaPrivilege	2364	powershell.exe
Token: SeSecurityPrivilege	2364	powershell.exe
Token: SeTakeOwnershipPrivilege	2364	powershell.exe
Token: SeLoadDriverPrivilege	2364	powershell.exe
Token: SeSystemProfilePrivilege	2364	powershell.exe
Token: SeSystemtimePrivilege	2364	powershell.exe
Token: SeProfSingleProcessPrivilege	2364	powershell.exe
Token: SeIncBasePriorityPrivilege	2364	powershell.exe
Token: SeCreatePagefilePrivilege	2364	powershell.exe
Token: SeBackupPrivilege	2364	powershell.exe
Token: SeRestorePrivilege	2364	powershell.exe
Token: SeShutdownPrivilege	2364	powershell.exe
Token: SeDebugPrivilege	2364	powershell.exe
Token: SeSystemEnvironmentPrivilege	2364	powershell.exe
Token: SeRemoteShutdownPrivilege	2364	powershell.exe
Token: SeUndockPrivilege	2364	powershell.exe
Token: SeManageVolumePrivilege	2364	powershell.exe
Token: 33	2364	powershell.exe
Token: 34	2364	powershell.exe
Token: 35	2364	powershell.exe

Suspicious use of FindShellTrayWindow 2 IoCs

pid	Process
2868	random.tmp
3796	regsvr32.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
3796	regsvr32.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3796	regsvr32.exe

Suspicious use of WriteProcessMemory 22 IoCs

description	pid	Process	procid_target
PID 4292 wrote to memory of 4496	4292	random.exe	84
PID 4292 wrote to memory of 4496	4292	random.exe	84
PID 4292 wrote to memory of 4496	4292	random.exe	84
PID 4496 wrote to memory of 1244	4496	random.tmp	86
PID 4496 wrote to memory of 1244	4496	random.tmp	86
PID 4496 wrote to memory of 1244	4496	random.tmp	86
PID 1244 wrote to memory of 2868	1244	random.exe	87
PID 1244 wrote to memory of 2868	1244	random.exe	87
PID 1244 wrote to memory of 2868	1244	random.exe	87
PID 2868 wrote to memory of 4936	2868	random.tmp	88
PID 2868 wrote to memory of 4936	2868	random.tmp	88
PID 2868 wrote to memory of 4936	2868	random.tmp	88
PID 4936 wrote to memory of 3796	4936	regsvr32.exe	89
PID 4936 wrote to memory of 3796	4936	regsvr32.exe	89
PID 3796 wrote to memory of 2496	3796	regsvr32.exe	90
PID 3796 wrote to memory of 2496	3796	regsvr32.exe	90
PID 3796 wrote to memory of 2364	3796	regsvr32.exe	94
PID 3796 wrote to memory of 2364	3796	regsvr32.exe	94
PID 1092 wrote to memory of 1560	1092	regsvr32.EXE	101
PID 1092 wrote to memory of 1560	1092	regsvr32.EXE	101
PID 2100 wrote to memory of 4140	2100	regsvr32.EXE	105
PID 2100 wrote to memory of 4140	2100	regsvr32.EXE	105

C:\Users\Admin\AppData\Local\Temp\random.exe
"C:\Users\Admin\AppData\Local\Temp\random.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4292
- C:\Users\Admin\AppData\Local\Temp\is-94GM6.tmp\random.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-94GM6.tmp\random.tmp" /SL5="$7004A,2299112,208384,C:\Users\Admin\AppData\Local\Temp\random.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4496
- - C:\Users\Admin\AppData\Local\Temp\random.exe
    "C:\Users\Admin\AppData\Local\Temp\random.exe" /VERYSILENT
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:1244
  - - C:\Users\Admin\AppData\Local\Temp\is-N22IM.tmp\random.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-N22IM.tmp\random.tmp" /SL5="$A003A,2299112,208384,C:\Users\Admin\AppData\Local\Temp\random.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:2868
    - - C:\Windows\SysWOW64\regsvr32.exe
        
        "regsvr32.exe" /s /i:SYNC "C:\Users\Admin\AppData\Roaming\\8dnsapi_5.drv"
        5⤵
        Loads dropped DLL
        System Location Discovery: System Language Discovery
        Suspicious use of WriteProcessMemory
        
        PID:4936
      - C:\Windows\system32\regsvr32.exe
        
        /s /i:SYNC "C:\Users\Admin\AppData\Roaming\\8dnsapi_5.drv"
        6⤵
        Loads dropped DLL
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of FindShellTrayWindow
        Suspicious use of SendNotifyMessage
        Suspicious use of SetWindowsHookEx
        Suspicious use of WriteProcessMemory
        
        PID:3796
        
        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\8dnsapi_5.drv' }) { exit 0 } else { exit 1 }"
        7⤵
        Command and Scripting Interpreter: PowerShell
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:2496
        
        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\8dnsapi_5.drv\") -Trigger (New-ScheduledTaskTrigger -Once -At (Get-Date).AddMinutes(1) -RepetitionInterval (New-TimeSpan -Minutes 1)) -TaskName 'MicrosoftEdgeUpdateTaskMachineUA{14C23651-EF0A-4FA6-9582-78F3082A9861}' -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:2364

C:\Windows\system32\regsvr32.EXE
C:\Windows\system32\regsvr32.EXE /S /i:SYNC C:\Users\Admin\AppData\Roaming\8dnsapi_5.drv
1⤵
- Loads dropped DLL
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1092
- 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\8dnsapi_5.drv' }) { exit 0 } else { exit 1 }"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  PID:1560

C:\Windows\system32\regsvr32.EXE
C:\Windows\system32\regsvr32.EXE /S /i:SYNC C:\Users\Admin\AppData\Roaming\8dnsapi_5.drv
1⤵
- Loads dropped DLL
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2100
- 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\8dnsapi_5.drv' }) { exit 0 } else { exit 1 }"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  PID:4140

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

Replay Monitor

Loading Replay Monitor...

Downloads

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

Filesize
1KB

MD5
fc35bf2367ee5c6feb084ab39f5c26eb

SHA1
cd9742c05391a92780a81fe836797a5909c7f9c1

SHA256
7ad08f1c2e7df4102eb3a6d213f4a0c245300c275fd53e463655a8ab9fa3ec64

SHA512
0b6662ea93907902c9f5db98bed4e9d322a69e7b8df921f6b8bd8026fdbfa556b0afe29013e3ecc8982a6339c48b4fe371ba587f02c39de72cb3840ed0e6747b

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

Filesize
1KB

MD5
d876732bbd3f6c9cf9e2be236480e367

SHA1
8f2dd87515f7bcf62cc89a8a27cc4fa7817e0823

SHA256
a4cea038e351c82952d795d84b29fc3e92680560d881bb86fe9dfbc4658dd9d0

SHA512
375217306f3de9bf02548db09efba9065b84314a1ddecba022613f9502a3302c3e7a800561253c8a2b6bfade0f5f8dd5c5a1ad4e58e45c613965c4564bfb14ab

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

Filesize
1KB

MD5
12c844ed8342738dacc6eb0072c43257

SHA1
b7f2f9e3ec4aaf5e2996720f129cd64887ac91d7

SHA256
2afeb7db4e46d3c1524512a73448e9cd0121deec761d8aa54fa9fe8b56df7519

SHA512
e3de9103533a69cccc36cd377297ba3ec9bd7a1159e1349d2cc01ab66a88a5a82b4ee3af61fab586a0cdfab915c7408735439fd0462c5c2cc2c787cb0765766a

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_v0bwnxpl.4zt.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-03V76.tmp\_isetup\_shfoldr.dll

Filesize
22KB

MD5
92dc6ef532fbb4a5c3201469a5b5eb63

SHA1
3e89ff837147c16b4e41c30d6c796374e0b8e62c

SHA256
9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

SHA512
9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-94GM6.tmp\random.tmp

Filesize
1.2MB

MD5
1db83d1bc949e72509f0e752316ec5d0

SHA1
154d7bd59581ea106d8a02586feaf5c38f806d39

SHA256
57c68e06bd351b2fde4f25f04c89fc265c0c3ce3184fb0caca3410b6eac04a49

SHA512
ff0eba3e3a9407107d2e5875d4369be68c1f1f43144aea8c9b530824f3b9c837705ecd0c7d94bbaadfa59bb273b7e59392bef3d9aaf643353e4b935f8745d4b2

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-LD39H.tmp\_isetup\_isdecmp.dll

Filesize
13KB

MD5
a813d18268affd4763dde940246dc7e5

SHA1
c7366e1fd925c17cc6068001bd38eaef5b42852f

SHA256
e19781aabe466dd8779cb9c8fa41bbb73375447066bb34e876cf388a6ed63c64

SHA512
b310ed4cd2e94381c00a6a370fcb7cc867ebe425d705b69caaaaffdafbab91f72d357966916053e72e68ecf712f2af7585500c58bb53ec3e1d539179fcb45fb4

Download Submit
C:\Users\Admin\AppData\Roaming\8dnsapi_5.drv

Filesize
4.1MB

MD5
6fb91b9f96c8a0f6e20e75377152363a

SHA1
be3ed35dee6b517b9e846bc431197c2d6239f8e1

SHA256
be67966b82dcb5e838095d0ebcccbc854b6eae9d6ac30329457019f2d7d119ae

SHA512
da994e4ee32aee52d98d21ab69887d94efe186d9e0a34b2cc09e0da949fb25a10de464136c305a66c332457d876e5e6ce2acaf6c4f1ba00f7e6345cdda030996

Download Submit
memory/1092-102-0x00007FFA9F890000-0x00007FFA9FC91000-memory.dmp

Filesize
4.0MB

Download
memory/1244-23-0x0000000000400000-0x000000000043D000-memory.dmp

Filesize
244KB

Download
memory/1244-54-0x0000000000400000-0x000000000043D000-memory.dmp

Filesize
244KB

Download
memory/1244-21-0x0000000000400000-0x000000000043D000-memory.dmp

Filesize
244KB

Download
memory/2100-121-0x00007FFA9F890000-0x00007FFA9FC91000-memory.dmp

Filesize
4.0MB

Download
memory/2496-62-0x000001767D610000-0x000001767D632000-memory.dmp

Filesize
136KB

Download
memory/2868-31-0x0000000000400000-0x0000000000538000-memory.dmp

Filesize
1.2MB

Download
memory/2868-51-0x0000000000400000-0x0000000000538000-memory.dmp

Filesize
1.2MB

Download
memory/3796-83-0x000000001C540000-0x000000001C5F2000-memory.dmp

Filesize
712KB

Download
memory/3796-81-0x000000001B490000-0x000000001B7B4000-memory.dmp

Filesize
3.1MB

Download
memory/3796-82-0x000000001C430000-0x000000001C480000-memory.dmp

Filesize
320KB

Download
memory/3796-84-0x00007FFA9F890000-0x00007FFA9FC91000-memory.dmp

Filesize
4.0MB

Download
memory/4292-0-0x0000000000400000-0x000000000043D000-memory.dmp

Filesize
244KB

Download
memory/4292-2-0x0000000000401000-0x0000000000417000-memory.dmp

Filesize
88KB

Download
memory/4292-27-0x0000000000400000-0x000000000043D000-memory.dmp

Filesize
244KB

Download
memory/4496-25-0x0000000000400000-0x0000000000538000-memory.dmp

Filesize
1.2MB

Download
memory/4496-7-0x0000000000400000-0x0000000000538000-memory.dmp

Filesize
1.2MB

Download