quasar | 616bbced150df4c538374a032a176e88165f5e95f3fffaeae28ffa68cda552a1

Analysis

max time kernel
142s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
29-01-2025 14:39

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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/4504-82-0x000000001BA30000-0x000000001BD54000-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	random.tmp

Executes dropped EXE 2 IoCs

pid	Process
3764	random.tmp
400	random.tmp

Loads dropped DLL 8 IoCs

pid	Process
3764	random.tmp
3764	random.tmp
400	random.tmp
400	random.tmp
3696	regsvr32.exe
4504	regsvr32.exe
4696	regsvr32.EXE
3912	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
2144	powershell.exe
3152	powershell.exe
1220	powershell.exe
3544	powershell.exe
3152	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.tmp
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	regsvr32.exe
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

Suspicious behavior: EnumeratesProcesses 22 IoCs

pid	Process
400	random.tmp
400	random.tmp
4504	regsvr32.exe
4504	regsvr32.exe
2144	powershell.exe
2144	powershell.exe
3152	powershell.exe
3152	powershell.exe
4504	regsvr32.exe
4504	regsvr32.exe
4696	regsvr32.EXE
4696	regsvr32.EXE
1220	powershell.exe
1220	powershell.exe
4696	regsvr32.EXE
4696	regsvr32.EXE
3912	regsvr32.EXE
3912	regsvr32.EXE
3544	powershell.exe
3544	powershell.exe
3912	regsvr32.EXE
3912	regsvr32.EXE

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2144	powershell.exe
Token: SeIncreaseQuotaPrivilege	2144	powershell.exe
Token: SeSecurityPrivilege	2144	powershell.exe
Token: SeTakeOwnershipPrivilege	2144	powershell.exe
Token: SeLoadDriverPrivilege	2144	powershell.exe
Token: SeSystemProfilePrivilege	2144	powershell.exe
Token: SeSystemtimePrivilege	2144	powershell.exe
Token: SeProfSingleProcessPrivilege	2144	powershell.exe
Token: SeIncBasePriorityPrivilege	2144	powershell.exe
Token: SeCreatePagefilePrivilege	2144	powershell.exe
Token: SeBackupPrivilege	2144	powershell.exe
Token: SeRestorePrivilege	2144	powershell.exe
Token: SeShutdownPrivilege	2144	powershell.exe
Token: SeDebugPrivilege	2144	powershell.exe
Token: SeSystemEnvironmentPrivilege	2144	powershell.exe
Token: SeRemoteShutdownPrivilege	2144	powershell.exe
Token: SeUndockPrivilege	2144	powershell.exe
Token: SeManageVolumePrivilege	2144	powershell.exe
Token: 33	2144	powershell.exe
Token: 34	2144	powershell.exe
Token: 35	2144	powershell.exe
Token: 36	2144	powershell.exe
Token: SeDebugPrivilege	3152	powershell.exe
Token: SeIncreaseQuotaPrivilege	3152	powershell.exe
Token: SeSecurityPrivilege	3152	powershell.exe
Token: SeTakeOwnershipPrivilege	3152	powershell.exe
Token: SeLoadDriverPrivilege	3152	powershell.exe
Token: SeSystemProfilePrivilege	3152	powershell.exe
Token: SeSystemtimePrivilege	3152	powershell.exe
Token: SeProfSingleProcessPrivilege	3152	powershell.exe
Token: SeIncBasePriorityPrivilege	3152	powershell.exe
Token: SeCreatePagefilePrivilege	3152	powershell.exe
Token: SeBackupPrivilege	3152	powershell.exe
Token: SeRestorePrivilege	3152	powershell.exe
Token: SeShutdownPrivilege	3152	powershell.exe
Token: SeDebugPrivilege	3152	powershell.exe
Token: SeSystemEnvironmentPrivilege	3152	powershell.exe
Token: SeRemoteShutdownPrivilege	3152	powershell.exe
Token: SeUndockPrivilege	3152	powershell.exe
Token: SeManageVolumePrivilege	3152	powershell.exe
Token: 33	3152	powershell.exe
Token: 34	3152	powershell.exe
Token: 35	3152	powershell.exe
Token: 36	3152	powershell.exe
Token: SeIncreaseQuotaPrivilege	3152	powershell.exe
Token: SeSecurityPrivilege	3152	powershell.exe
Token: SeTakeOwnershipPrivilege	3152	powershell.exe
Token: SeLoadDriverPrivilege	3152	powershell.exe
Token: SeSystemProfilePrivilege	3152	powershell.exe
Token: SeSystemtimePrivilege	3152	powershell.exe
Token: SeProfSingleProcessPrivilege	3152	powershell.exe
Token: SeIncBasePriorityPrivilege	3152	powershell.exe
Token: SeCreatePagefilePrivilege	3152	powershell.exe
Token: SeBackupPrivilege	3152	powershell.exe
Token: SeRestorePrivilege	3152	powershell.exe
Token: SeShutdownPrivilege	3152	powershell.exe
Token: SeDebugPrivilege	3152	powershell.exe
Token: SeSystemEnvironmentPrivilege	3152	powershell.exe
Token: SeRemoteShutdownPrivilege	3152	powershell.exe
Token: SeUndockPrivilege	3152	powershell.exe
Token: SeManageVolumePrivilege	3152	powershell.exe
Token: 33	3152	powershell.exe
Token: 34	3152	powershell.exe
Token: 35	3152	powershell.exe

Suspicious use of FindShellTrayWindow 2 IoCs

pid	Process
400	random.tmp
4504	regsvr32.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
4504	regsvr32.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4504	regsvr32.exe

Suspicious use of WriteProcessMemory 22 IoCs

description	pid	Process	procid_target
PID 3224 wrote to memory of 3764	3224	random.exe	82
PID 3224 wrote to memory of 3764	3224	random.exe	82
PID 3224 wrote to memory of 3764	3224	random.exe	82
PID 3764 wrote to memory of 2996	3764	random.tmp	83
PID 3764 wrote to memory of 2996	3764	random.tmp	83
PID 3764 wrote to memory of 2996	3764	random.tmp	83
PID 2996 wrote to memory of 400	2996	random.exe	84
PID 2996 wrote to memory of 400	2996	random.exe	84
PID 2996 wrote to memory of 400	2996	random.exe	84
PID 400 wrote to memory of 3696	400	random.tmp	85
PID 400 wrote to memory of 3696	400	random.tmp	85
PID 400 wrote to memory of 3696	400	random.tmp	85
PID 3696 wrote to memory of 4504	3696	regsvr32.exe	86
PID 3696 wrote to memory of 4504	3696	regsvr32.exe	86
PID 4504 wrote to memory of 2144	4504	regsvr32.exe	87
PID 4504 wrote to memory of 2144	4504	regsvr32.exe	87
PID 4504 wrote to memory of 3152	4504	regsvr32.exe	90
PID 4504 wrote to memory of 3152	4504	regsvr32.exe	90
PID 4696 wrote to memory of 1220	4696	regsvr32.EXE	101
PID 4696 wrote to memory of 1220	4696	regsvr32.EXE	101
PID 3912 wrote to memory of 3544	3912	regsvr32.EXE	104
PID 3912 wrote to memory of 3544	3912	regsvr32.EXE	104

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:3224
- C:\Users\Admin\AppData\Local\Temp\is-9EB7S.tmp\random.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-9EB7S.tmp\random.tmp" /SL5="$80070,2299112,208384,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:3764
- - 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:2996
  - - C:\Users\Admin\AppData\Local\Temp\is-6SIHL.tmp\random.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-6SIHL.tmp\random.tmp" /SL5="$9004E,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:400
    - - 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:3696
      - 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:4504
        
        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:2144
        
        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{3A3172EA-6DCE-439D-EB99-0CFB598DC85A}' -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:3152

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:4696
- 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:1220

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:3912
- 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:3544

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
661739d384d9dfd807a089721202900b

SHA1
5b2c5d6a7122b4ce849dc98e79a7713038feac55

SHA256
70c3ecbaa6df88e88df4efc70968502955e890a2248269641c4e2d4668ef61bf

SHA512
81b48ae5c4064c4d9597303d913e32d3954954ba1c8123731d503d1653a0d848856812d2ee6951efe06b1db2b91a50e5d54098f60c26f36bc8390203f4c8a2d8

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
6b3f025e0fe16f90a195d5a845ea92c4

SHA1
2039ca9aedf7bde38d5f538991ac4c3684651a07

SHA256
cc1288db96dcc16fd4bef4fa2dd6d85e313af2e4c23fdf7f23b7f654cd61575a

SHA512
ac8c18b21ed5d090808d99c3d657691f9d47894e77d18a35d8906cbbcc2e6e5c3f5b6926241a492068b01c74263161967a7ecd4f1b1972e65ae509bf5df5a20e

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

Filesize
1KB

MD5
9331400580376899f1c17da98b87e707

SHA1
b4e4a3e92db87cc8659e389bcbb7de9fdb306e00

SHA256
2fbdf49ae199e56f2e8e9140c375b954ebc8fee4ece3090baeb3f17b4c268c11

SHA512
59781d1409a4e9aad0b84f46096f329329fab78b5ab61d02035904399c0b43eb0cae98871d90950c5a3d045f92dfe8a112ff64c9d61087b61f5c077fc706aa3a

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_4afxtxxf.mrg.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-9EB7S.tmp\random.tmp

Filesize
1.2MB

MD5
1db83d1bc949e72509f0e752316ec5d0

SHA1
154d7bd59581ea106d8a02586feaf5c38f806d39

SHA256
57c68e06bd351b2fde4f25f04c89fc265c0c3ce3184fb0caca3410b6eac04a49

SHA512
ff0eba3e3a9407107d2e5875d4369be68c1f1f43144aea8c9b530824f3b9c837705ecd0c7d94bbaadfa59bb273b7e59392bef3d9aaf643353e4b935f8745d4b2

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

Filesize
13KB

MD5
a813d18268affd4763dde940246dc7e5

SHA1
c7366e1fd925c17cc6068001bd38eaef5b42852f

SHA256
e19781aabe466dd8779cb9c8fa41bbb73375447066bb34e876cf388a6ed63c64

SHA512
b310ed4cd2e94381c00a6a370fcb7cc867ebe425d705b69caaaaffdafbab91f72d357966916053e72e68ecf712f2af7585500c58bb53ec3e1d539179fcb45fb4

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-P64O3.tmp\_isetup\_shfoldr.dll

Filesize
22KB

MD5
92dc6ef532fbb4a5c3201469a5b5eb63

SHA1
3e89ff837147c16b4e41c30d6c796374e0b8e62c

SHA256
9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

SHA512
9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

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

Filesize
4.1MB

MD5
6fb91b9f96c8a0f6e20e75377152363a

SHA1
be3ed35dee6b517b9e846bc431197c2d6239f8e1

SHA256
be67966b82dcb5e838095d0ebcccbc854b6eae9d6ac30329457019f2d7d119ae

SHA512
da994e4ee32aee52d98d21ab69887d94efe186d9e0a34b2cc09e0da949fb25a10de464136c305a66c332457d876e5e6ce2acaf6c4f1ba00f7e6345cdda030996

Download Submit
memory/400-32-0x0000000000400000-0x0000000000538000-memory.dmp

Filesize
1.2MB

Download
memory/400-50-0x0000000000400000-0x0000000000538000-memory.dmp

Filesize
1.2MB

Download
memory/2144-61-0x000002672C4D0000-0x000002672C4F2000-memory.dmp

Filesize
136KB

Download
memory/2996-53-0x0000000000400000-0x000000000043D000-memory.dmp

Filesize
244KB

Download
memory/2996-23-0x0000000000400000-0x000000000043D000-memory.dmp

Filesize
244KB

Download
memory/2996-21-0x0000000000400000-0x000000000043D000-memory.dmp

Filesize
244KB

Download
memory/3224-2-0x0000000000401000-0x0000000000417000-memory.dmp

Filesize
88KB

Download
memory/3224-25-0x0000000000400000-0x000000000043D000-memory.dmp

Filesize
244KB

Download
memory/3224-0-0x0000000000400000-0x000000000043D000-memory.dmp

Filesize
244KB

Download
memory/3764-7-0x0000000000400000-0x0000000000538000-memory.dmp

Filesize
1.2MB

Download
memory/3764-24-0x0000000000400000-0x0000000000538000-memory.dmp

Filesize
1.2MB

Download
memory/3912-122-0x00007FFB0A540000-0x00007FFB0A941000-memory.dmp

Filesize
4.0MB

Download
memory/4504-83-0x000000001B8F0000-0x000000001B940000-memory.dmp

Filesize
320KB

Download
memory/4504-84-0x000000001C9D0000-0x000000001CA82000-memory.dmp

Filesize
712KB

Download
memory/4504-85-0x00007FFB0A540000-0x00007FFB0A941000-memory.dmp

Filesize
4.0MB

Download
memory/4504-82-0x000000001BA30000-0x000000001BD54000-memory.dmp

Filesize
3.1MB

Download
memory/4696-102-0x00007FFB0A540000-0x00007FFB0A941000-memory.dmp

Filesize
4.0MB

Download