quasar | c6d8cde7cd9d0731356ae426c5b6d3d7a8ab05143fa78d257af9b9d037be7b49

Analysis

max time kernel
141s
max time network
143s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
submitted
06-02-2025 07:16

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General

Target

c6d8cde7cd9d0731356ae426c5b6d3d7a8ab05143fa78d257af9b9d037be7b49.exe
Size

3.2MB
MD5

a2f9781e42a8da5eb3cbe8a4dba009e6
SHA1

61baaae3da49b0985fa32e6ef9c6ca7a422e0eb4
SHA256

c6d8cde7cd9d0731356ae426c5b6d3d7a8ab05143fa78d257af9b9d037be7b49
SHA512

fc5b0416333ba59d7af489255f258db879bf1b7639000a54ff233b100cb50ff57f0026512d58fb540d87cdac0a398c1b796ef4156cd8293e4a1978b2f4c0aa15
SSDEEP

98304:1OXPiu6YrHfZ1diRq+/gr56mQr+dFiJzqGT4q:Qiu6MfZ1dt+AVq6mei4q

Score

10^/10

quasar svchost32 discovery execution spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

svchost32

185.147.124.146:4782

Mutex

70595b2f-92ed-4cab-b358-5e9c155366b4

Attributes

encryption_key
B207941BD17A6DAD99D4F816F934730315BCD00D
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
behavioral1/memory/764-72-0x000000001BE30000-0x000000001C154000-memory.dmp	family_quasar

Executes dropped EXE 2 IoCs

pid	Process
2700	c6d8cde7cd9d0731356ae426c5b6d3d7a8ab05143fa78d257af9b9d037be7b49.tmp
2696	c6d8cde7cd9d0731356ae426c5b6d3d7a8ab05143fa78d257af9b9d037be7b49.tmp

Loads dropped DLL 10 IoCs

pid	Process
2848	c6d8cde7cd9d0731356ae426c5b6d3d7a8ab05143fa78d257af9b9d037be7b49.exe
2700	c6d8cde7cd9d0731356ae426c5b6d3d7a8ab05143fa78d257af9b9d037be7b49.tmp
2700	c6d8cde7cd9d0731356ae426c5b6d3d7a8ab05143fa78d257af9b9d037be7b49.tmp
2700	c6d8cde7cd9d0731356ae426c5b6d3d7a8ab05143fa78d257af9b9d037be7b49.tmp
2720	c6d8cde7cd9d0731356ae426c5b6d3d7a8ab05143fa78d257af9b9d037be7b49.exe
2696	c6d8cde7cd9d0731356ae426c5b6d3d7a8ab05143fa78d257af9b9d037be7b49.tmp
2696	c6d8cde7cd9d0731356ae426c5b6d3d7a8ab05143fa78d257af9b9d037be7b49.tmp
2696	c6d8cde7cd9d0731356ae426c5b6d3d7a8ab05143fa78d257af9b9d037be7b49.tmp
2564	regsvr32.exe
764	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 3 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
2600	powershell.exe
1652	powershell.exe
2600	powershell.exe

Drops file in System32 directory 2 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
File opened for modification	C:\Windows\System32\%ProgramData%\Microsoft\Windows\Start Menu\Programs\Accessories\Windows PowerShell\Windows PowerShell.lnk	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	c6d8cde7cd9d0731356ae426c5b6d3d7a8ab05143fa78d257af9b9d037be7b49.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	c6d8cde7cd9d0731356ae426c5b6d3d7a8ab05143fa78d257af9b9d037be7b49.tmp
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	c6d8cde7cd9d0731356ae426c5b6d3d7a8ab05143fa78d257af9b9d037be7b49.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	c6d8cde7cd9d0731356ae426c5b6d3d7a8ab05143fa78d257af9b9d037be7b49.tmp
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	regsvr32.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2696	c6d8cde7cd9d0731356ae426c5b6d3d7a8ab05143fa78d257af9b9d037be7b49.tmp
2696	c6d8cde7cd9d0731356ae426c5b6d3d7a8ab05143fa78d257af9b9d037be7b49.tmp
764	regsvr32.exe
1652	powershell.exe
2600	powershell.exe
764	regsvr32.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1652	powershell.exe
Token: SeDebugPrivilege	2600	powershell.exe
Token: SeDebugPrivilege	764	regsvr32.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2696	c6d8cde7cd9d0731356ae426c5b6d3d7a8ab05143fa78d257af9b9d037be7b49.tmp

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
764	regsvr32.exe

Suspicious use of WriteProcessMemory 41 IoCs

description	pid	Process	procid_target
PID 2848 wrote to memory of 2700	2848	c6d8cde7cd9d0731356ae426c5b6d3d7a8ab05143fa78d257af9b9d037be7b49.exe	30
PID 2848 wrote to memory of 2700	2848	c6d8cde7cd9d0731356ae426c5b6d3d7a8ab05143fa78d257af9b9d037be7b49.exe	30
PID 2848 wrote to memory of 2700	2848	c6d8cde7cd9d0731356ae426c5b6d3d7a8ab05143fa78d257af9b9d037be7b49.exe	30
PID 2848 wrote to memory of 2700	2848	c6d8cde7cd9d0731356ae426c5b6d3d7a8ab05143fa78d257af9b9d037be7b49.exe	30
PID 2848 wrote to memory of 2700	2848	c6d8cde7cd9d0731356ae426c5b6d3d7a8ab05143fa78d257af9b9d037be7b49.exe	30
PID 2848 wrote to memory of 2700	2848	c6d8cde7cd9d0731356ae426c5b6d3d7a8ab05143fa78d257af9b9d037be7b49.exe	30
PID 2848 wrote to memory of 2700	2848	c6d8cde7cd9d0731356ae426c5b6d3d7a8ab05143fa78d257af9b9d037be7b49.exe	30
PID 2700 wrote to memory of 2720	2700	c6d8cde7cd9d0731356ae426c5b6d3d7a8ab05143fa78d257af9b9d037be7b49.tmp	31
PID 2700 wrote to memory of 2720	2700	c6d8cde7cd9d0731356ae426c5b6d3d7a8ab05143fa78d257af9b9d037be7b49.tmp	31
PID 2700 wrote to memory of 2720	2700	c6d8cde7cd9d0731356ae426c5b6d3d7a8ab05143fa78d257af9b9d037be7b49.tmp	31
PID 2700 wrote to memory of 2720	2700	c6d8cde7cd9d0731356ae426c5b6d3d7a8ab05143fa78d257af9b9d037be7b49.tmp	31
PID 2700 wrote to memory of 2720	2700	c6d8cde7cd9d0731356ae426c5b6d3d7a8ab05143fa78d257af9b9d037be7b49.tmp	31
PID 2700 wrote to memory of 2720	2700	c6d8cde7cd9d0731356ae426c5b6d3d7a8ab05143fa78d257af9b9d037be7b49.tmp	31
PID 2700 wrote to memory of 2720	2700	c6d8cde7cd9d0731356ae426c5b6d3d7a8ab05143fa78d257af9b9d037be7b49.tmp	31
PID 2720 wrote to memory of 2696	2720	c6d8cde7cd9d0731356ae426c5b6d3d7a8ab05143fa78d257af9b9d037be7b49.exe	32
PID 2720 wrote to memory of 2696	2720	c6d8cde7cd9d0731356ae426c5b6d3d7a8ab05143fa78d257af9b9d037be7b49.exe	32
PID 2720 wrote to memory of 2696	2720	c6d8cde7cd9d0731356ae426c5b6d3d7a8ab05143fa78d257af9b9d037be7b49.exe	32
PID 2720 wrote to memory of 2696	2720	c6d8cde7cd9d0731356ae426c5b6d3d7a8ab05143fa78d257af9b9d037be7b49.exe	32
PID 2720 wrote to memory of 2696	2720	c6d8cde7cd9d0731356ae426c5b6d3d7a8ab05143fa78d257af9b9d037be7b49.exe	32
PID 2720 wrote to memory of 2696	2720	c6d8cde7cd9d0731356ae426c5b6d3d7a8ab05143fa78d257af9b9d037be7b49.exe	32
PID 2720 wrote to memory of 2696	2720	c6d8cde7cd9d0731356ae426c5b6d3d7a8ab05143fa78d257af9b9d037be7b49.exe	32
PID 2696 wrote to memory of 2564	2696	c6d8cde7cd9d0731356ae426c5b6d3d7a8ab05143fa78d257af9b9d037be7b49.tmp	33
PID 2696 wrote to memory of 2564	2696	c6d8cde7cd9d0731356ae426c5b6d3d7a8ab05143fa78d257af9b9d037be7b49.tmp	33
PID 2696 wrote to memory of 2564	2696	c6d8cde7cd9d0731356ae426c5b6d3d7a8ab05143fa78d257af9b9d037be7b49.tmp	33
PID 2696 wrote to memory of 2564	2696	c6d8cde7cd9d0731356ae426c5b6d3d7a8ab05143fa78d257af9b9d037be7b49.tmp	33
PID 2696 wrote to memory of 2564	2696	c6d8cde7cd9d0731356ae426c5b6d3d7a8ab05143fa78d257af9b9d037be7b49.tmp	33
PID 2696 wrote to memory of 2564	2696	c6d8cde7cd9d0731356ae426c5b6d3d7a8ab05143fa78d257af9b9d037be7b49.tmp	33
PID 2696 wrote to memory of 2564	2696	c6d8cde7cd9d0731356ae426c5b6d3d7a8ab05143fa78d257af9b9d037be7b49.tmp	33
PID 2564 wrote to memory of 764	2564	regsvr32.exe	34
PID 2564 wrote to memory of 764	2564	regsvr32.exe	34
PID 2564 wrote to memory of 764	2564	regsvr32.exe	34
PID 2564 wrote to memory of 764	2564	regsvr32.exe	34
PID 2564 wrote to memory of 764	2564	regsvr32.exe	34
PID 2564 wrote to memory of 764	2564	regsvr32.exe	34
PID 2564 wrote to memory of 764	2564	regsvr32.exe	34
PID 764 wrote to memory of 1652	764	regsvr32.exe	35
PID 764 wrote to memory of 1652	764	regsvr32.exe	35
PID 764 wrote to memory of 1652	764	regsvr32.exe	35
PID 764 wrote to memory of 2600	764	regsvr32.exe	37
PID 764 wrote to memory of 2600	764	regsvr32.exe	37
PID 764 wrote to memory of 2600	764	regsvr32.exe	37

C:\Users\Admin\AppData\Local\Temp\c6d8cde7cd9d0731356ae426c5b6d3d7a8ab05143fa78d257af9b9d037be7b49.exe
"C:\Users\Admin\AppData\Local\Temp\c6d8cde7cd9d0731356ae426c5b6d3d7a8ab05143fa78d257af9b9d037be7b49.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2848
- C:\Users\Admin\AppData\Local\Temp\is-G87AR.tmp\c6d8cde7cd9d0731356ae426c5b6d3d7a8ab05143fa78d257af9b9d037be7b49.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-G87AR.tmp\c6d8cde7cd9d0731356ae426c5b6d3d7a8ab05143fa78d257af9b9d037be7b49.tmp" /SL5="$9014E,2956477,245248,C:\Users\Admin\AppData\Local\Temp\c6d8cde7cd9d0731356ae426c5b6d3d7a8ab05143fa78d257af9b9d037be7b49.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2700
- - C:\Users\Admin\AppData\Local\Temp\c6d8cde7cd9d0731356ae426c5b6d3d7a8ab05143fa78d257af9b9d037be7b49.exe
    "C:\Users\Admin\AppData\Local\Temp\c6d8cde7cd9d0731356ae426c5b6d3d7a8ab05143fa78d257af9b9d037be7b49.exe" /VERYSILENT
    3⤵
    - Loads dropped DLL
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2720
  - - C:\Users\Admin\AppData\Local\Temp\is-RH1EA.tmp\c6d8cde7cd9d0731356ae426c5b6d3d7a8ab05143fa78d257af9b9d037be7b49.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-RH1EA.tmp\c6d8cde7cd9d0731356ae426c5b6d3d7a8ab05143fa78d257af9b9d037be7b49.tmp" /SL5="$A014E,2956477,245248,C:\Users\Admin\AppData\Local\Temp\c6d8cde7cd9d0731356ae426c5b6d3d7a8ab05143fa78d257af9b9d037be7b49.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:2696
    - - C:\Windows\SysWOW64\regsvr32.exe
        
        "regsvr32.exe" /s /i:SYNC "C:\Users\Admin\AppData\Roaming\\d3d9_4.drv"
        5⤵
        Loads dropped DLL
        System Location Discovery: System Language Discovery
        Suspicious use of WriteProcessMemory
        
        PID:2564
      - C:\Windows\system32\regsvr32.exe
        
        /s /i:SYNC "C:\Users\Admin\AppData\Roaming\\d3d9_4.drv"
        6⤵
        Loads dropped DLL
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        Suspicious use of SetWindowsHookEx
        Suspicious use of WriteProcessMemory
        
        PID:764
        
        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\d3d9_4.drv' }) { exit 0 } else { exit 1 }"
        7⤵
        Command and Scripting Interpreter: PowerShell
        Drops file in System32 directory
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:1652
        
        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\d3d9_4.drv\") -Trigger (New-ScheduledTaskTrigger -Once -At (Get-Date).AddMinutes(1) -RepetitionInterval (New-TimeSpan -Minutes 1)) -TaskName 'MicrosoftEdgeUpdateTaskMachineUA{1FF9824C-B909-4816-E8DE-4CD31363D960}' -Description 'MicrosoftEdgeUpdateTaskMachineUA' -Settings (New-ScheduledTaskSettingsSet -AllowStartIfOnBatteries -DontStopIfGoingOnBatteries -ExecutionTimeLimit 0) -RunLevel Highest"
        7⤵
        Command and Scripting Interpreter: PowerShell
        Drops file in System32 directory
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:2600

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

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Downloads

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms

Filesize
7KB

MD5
4c1d90717ebb168b5ad91413063f4438

SHA1
73fd50f3ee33914fa17a97267d7fa2d24f7eff82

SHA256
eb9d0f6c381ab3de8aa28b75901c607c096c2a6907c5cebce5c01b6c0c233459

SHA512
1a189f3f4af7b2e537364e48dde3d684b1de6eb283988774657facc66b2fb2f544edde0f01859dd2197992dee4f0908632ab3055b60c6f69c40962b3e6f2c635

Download Submit
C:\Users\Admin\AppData\Roaming\d3d9_4.drv

Filesize
4.2MB

MD5
707e9a2445ea22ce1bfafbad0583c1d4

SHA1
73918fb8eb7b21c2d6bb27f9ce48c23c92bef006

SHA256
3455e2e96cd0a23323da81a2bcf9566200de523f1d1d85efe27f55ed2add9e8b

SHA512
77485310a94451eb2246caf0cb03743facde00a7531eaea32725782f39b5b84739b71f203668b96f3e9e5ebee088fc0283406e9129ed27694cf9b8e67bbbbe66

Download Submit
\Users\Admin\AppData\Local\Temp\is-143JI.tmp\_isetup\_isdecmp.dll

Filesize
13KB

MD5
a813d18268affd4763dde940246dc7e5

SHA1
c7366e1fd925c17cc6068001bd38eaef5b42852f

SHA256
e19781aabe466dd8779cb9c8fa41bbb73375447066bb34e876cf388a6ed63c64

SHA512
b310ed4cd2e94381c00a6a370fcb7cc867ebe425d705b69caaaaffdafbab91f72d357966916053e72e68ecf712f2af7585500c58bb53ec3e1d539179fcb45fb4

Download Submit
\Users\Admin\AppData\Local\Temp\is-143JI.tmp\_isetup\_shfoldr.dll

Filesize
22KB

MD5
92dc6ef532fbb4a5c3201469a5b5eb63

SHA1
3e89ff837147c16b4e41c30d6c796374e0b8e62c

SHA256
9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

SHA512
9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

Download Submit
\Users\Admin\AppData\Local\Temp\is-G87AR.tmp\c6d8cde7cd9d0731356ae426c5b6d3d7a8ab05143fa78d257af9b9d037be7b49.tmp

Filesize
1.2MB

MD5
70fcedd0d46d1c97af8e3eb4868c5bf1

SHA1
42ae1e3080be4720fc1bb97ef63d59f2f26e1558

SHA256
fcae74ccb09740303d86a88dd07db209721458e8eb48697f1c7d666a67dd5a07

SHA512
2cc42882fbdcd3d8bc4c3caa2116b76bd65fccff35e6058cfe67a80a307251b77bcbf17ddbd51e9d566f6810ac95ea33848da2a733cab6135d399dfaaf0c1020

Download Submit
memory/764-73-0x000007FEF51B0000-0x000007FEF55FC000-memory.dmp

Filesize
4.3MB

Download
memory/764-72-0x000000001BE30000-0x000000001C154000-memory.dmp

Filesize
3.1MB

Download
memory/1652-61-0x000000001B5D0000-0x000000001B8B2000-memory.dmp

Filesize
2.9MB

Download
memory/1652-62-0x0000000001BE0000-0x0000000001BE8000-memory.dmp

Filesize
32KB

Download
memory/2600-69-0x000000001B5D0000-0x000000001B8B2000-memory.dmp

Filesize
2.9MB

Download
memory/2600-70-0x0000000001D90000-0x0000000001D98000-memory.dmp

Filesize
32KB

Download
memory/2696-51-0x0000000000400000-0x0000000000541000-memory.dmp

Filesize
1.3MB

Download
memory/2700-25-0x0000000000400000-0x0000000000541000-memory.dmp

Filesize
1.3MB

Download
memory/2700-15-0x0000000000400000-0x0000000000541000-memory.dmp

Filesize
1.3MB

Download
memory/2720-53-0x0000000000400000-0x0000000000446000-memory.dmp

Filesize
280KB

Download
memory/2720-21-0x0000000000400000-0x0000000000446000-memory.dmp

Filesize
280KB

Download
memory/2848-27-0x0000000000400000-0x0000000000446000-memory.dmp

Filesize
280KB

Download
memory/2848-2-0x0000000000401000-0x0000000000417000-memory.dmp

Filesize
88KB

Download
memory/2848-0-0x0000000000400000-0x0000000000446000-memory.dmp

Filesize
280KB

Download