quasar | 1528a6080656c5a8cf440d976047d7fa31e93e483c10142f416108f211145ff0

Analysis

max time kernel
150s
max time network
155s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
submitted
15-01-2025 02:11

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General

Target

1528a6080656c5a8cf440d976047d7fa31e93e483c10142f416108f211145ff0.exe
Size

3.8MB
MD5

df29ee043d88f265cd76747f62ab3ea7
SHA1

0594a814e05c80618a72a865fa53d24fd351db5b
SHA256

1528a6080656c5a8cf440d976047d7fa31e93e483c10142f416108f211145ff0
SHA512

7826bc0582819fb165b25c21fd5a9385b47332201a464b8ae4a035d65f0b3c7ece75507ba0acfa92a6e8b55f2a18ba83344dbf3db264be7d43d3beb5796384a1
SSDEEP

98304:WhZ14lAzlFFzMsYLtZvQ1pVjLvAMQkWS27MtXE:WhZ1AAvFzMBNQTBIMQkXtX

Score

10^/10

quasar gasplant discovery execution spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

gasplant

toolsbox.ydns.eu:20901

Mutex

33714128-68e4-4509-bd32-b7e414783d3eDtWike

Attributes

encryption_key
43CBFE44C367A91A79A79C9E1778A82D0B498870
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 5 IoCs

resource	yara_rule
behavioral1/memory/576-28-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar
behavioral1/memory/576-29-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar
behavioral1/memory/576-32-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar
behavioral1/memory/576-25-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar
behavioral1/memory/576-23-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar

Command and Scripting Interpreter: PowerShell 1 TTPs 4 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
2744	powershell.exe
1820	powershell.exe
772	powershell.exe
952	powershell.exe

Executes dropped EXE 2 IoCs

pid	Process
1624	Client.exe
1116	Client.exe

Loads dropped DLL 2 IoCs

pid	Process
576	1528a6080656c5a8cf440d976047d7fa31e93e483c10142f416108f211145ff0.exe
1624	Client.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1952 set thread context of 576	1952	1528a6080656c5a8cf440d976047d7fa31e93e483c10142f416108f211145ff0.exe	37
PID 1624 set thread context of 1116	1624	Client.exe	47

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 12 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	Client.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	1528a6080656c5a8cf440d976047d7fa31e93e483c10142f416108f211145ff0.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	1528a6080656c5a8cf440d976047d7fa31e93e483c10142f416108f211145ff0.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Client.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 4 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
2952	schtasks.exe
804	schtasks.exe
936	schtasks.exe
2736	schtasks.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2744	powershell.exe
1820	powershell.exe
952	powershell.exe
772	powershell.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	576	1528a6080656c5a8cf440d976047d7fa31e93e483c10142f416108f211145ff0.exe
Token: SeDebugPrivilege	2744	powershell.exe
Token: SeDebugPrivilege	1820	powershell.exe
Token: SeDebugPrivilege	952	powershell.exe
Token: SeDebugPrivilege	772	powershell.exe
Token: SeDebugPrivilege	1116	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1116	Client.exe

Suspicious use of WriteProcessMemory 54 IoCs

description	pid	Process	procid_target
PID 1952 wrote to memory of 2744	1952	1528a6080656c5a8cf440d976047d7fa31e93e483c10142f416108f211145ff0.exe	31
PID 1952 wrote to memory of 2744	1952	1528a6080656c5a8cf440d976047d7fa31e93e483c10142f416108f211145ff0.exe	31
PID 1952 wrote to memory of 2744	1952	1528a6080656c5a8cf440d976047d7fa31e93e483c10142f416108f211145ff0.exe	31
PID 1952 wrote to memory of 2744	1952	1528a6080656c5a8cf440d976047d7fa31e93e483c10142f416108f211145ff0.exe	31
PID 1952 wrote to memory of 1820	1952	1528a6080656c5a8cf440d976047d7fa31e93e483c10142f416108f211145ff0.exe	33
PID 1952 wrote to memory of 1820	1952	1528a6080656c5a8cf440d976047d7fa31e93e483c10142f416108f211145ff0.exe	33
PID 1952 wrote to memory of 1820	1952	1528a6080656c5a8cf440d976047d7fa31e93e483c10142f416108f211145ff0.exe	33
PID 1952 wrote to memory of 1820	1952	1528a6080656c5a8cf440d976047d7fa31e93e483c10142f416108f211145ff0.exe	33
PID 1952 wrote to memory of 2736	1952	1528a6080656c5a8cf440d976047d7fa31e93e483c10142f416108f211145ff0.exe	35
PID 1952 wrote to memory of 2736	1952	1528a6080656c5a8cf440d976047d7fa31e93e483c10142f416108f211145ff0.exe	35
PID 1952 wrote to memory of 2736	1952	1528a6080656c5a8cf440d976047d7fa31e93e483c10142f416108f211145ff0.exe	35
PID 1952 wrote to memory of 2736	1952	1528a6080656c5a8cf440d976047d7fa31e93e483c10142f416108f211145ff0.exe	35
PID 1952 wrote to memory of 576	1952	1528a6080656c5a8cf440d976047d7fa31e93e483c10142f416108f211145ff0.exe	37
PID 1952 wrote to memory of 576	1952	1528a6080656c5a8cf440d976047d7fa31e93e483c10142f416108f211145ff0.exe	37
PID 1952 wrote to memory of 576	1952	1528a6080656c5a8cf440d976047d7fa31e93e483c10142f416108f211145ff0.exe	37
PID 1952 wrote to memory of 576	1952	1528a6080656c5a8cf440d976047d7fa31e93e483c10142f416108f211145ff0.exe	37
PID 1952 wrote to memory of 576	1952	1528a6080656c5a8cf440d976047d7fa31e93e483c10142f416108f211145ff0.exe	37
PID 1952 wrote to memory of 576	1952	1528a6080656c5a8cf440d976047d7fa31e93e483c10142f416108f211145ff0.exe	37
PID 1952 wrote to memory of 576	1952	1528a6080656c5a8cf440d976047d7fa31e93e483c10142f416108f211145ff0.exe	37
PID 1952 wrote to memory of 576	1952	1528a6080656c5a8cf440d976047d7fa31e93e483c10142f416108f211145ff0.exe	37
PID 1952 wrote to memory of 576	1952	1528a6080656c5a8cf440d976047d7fa31e93e483c10142f416108f211145ff0.exe	37
PID 576 wrote to memory of 2952	576	1528a6080656c5a8cf440d976047d7fa31e93e483c10142f416108f211145ff0.exe	38
PID 576 wrote to memory of 2952	576	1528a6080656c5a8cf440d976047d7fa31e93e483c10142f416108f211145ff0.exe	38
PID 576 wrote to memory of 2952	576	1528a6080656c5a8cf440d976047d7fa31e93e483c10142f416108f211145ff0.exe	38
PID 576 wrote to memory of 2952	576	1528a6080656c5a8cf440d976047d7fa31e93e483c10142f416108f211145ff0.exe	38
PID 576 wrote to memory of 1624	576	1528a6080656c5a8cf440d976047d7fa31e93e483c10142f416108f211145ff0.exe	40
PID 576 wrote to memory of 1624	576	1528a6080656c5a8cf440d976047d7fa31e93e483c10142f416108f211145ff0.exe	40
PID 576 wrote to memory of 1624	576	1528a6080656c5a8cf440d976047d7fa31e93e483c10142f416108f211145ff0.exe	40
PID 576 wrote to memory of 1624	576	1528a6080656c5a8cf440d976047d7fa31e93e483c10142f416108f211145ff0.exe	40
PID 1624 wrote to memory of 772	1624	Client.exe	41
PID 1624 wrote to memory of 772	1624	Client.exe	41
PID 1624 wrote to memory of 772	1624	Client.exe	41
PID 1624 wrote to memory of 772	1624	Client.exe	41
PID 1624 wrote to memory of 952	1624	Client.exe	42
PID 1624 wrote to memory of 952	1624	Client.exe	42
PID 1624 wrote to memory of 952	1624	Client.exe	42
PID 1624 wrote to memory of 952	1624	Client.exe	42
PID 1624 wrote to memory of 804	1624	Client.exe	43
PID 1624 wrote to memory of 804	1624	Client.exe	43
PID 1624 wrote to memory of 804	1624	Client.exe	43
PID 1624 wrote to memory of 804	1624	Client.exe	43
PID 1624 wrote to memory of 1116	1624	Client.exe	47
PID 1624 wrote to memory of 1116	1624	Client.exe	47
PID 1624 wrote to memory of 1116	1624	Client.exe	47
PID 1624 wrote to memory of 1116	1624	Client.exe	47
PID 1624 wrote to memory of 1116	1624	Client.exe	47
PID 1624 wrote to memory of 1116	1624	Client.exe	47
PID 1624 wrote to memory of 1116	1624	Client.exe	47
PID 1624 wrote to memory of 1116	1624	Client.exe	47
PID 1624 wrote to memory of 1116	1624	Client.exe	47
PID 1116 wrote to memory of 936	1116	Client.exe	48
PID 1116 wrote to memory of 936	1116	Client.exe	48
PID 1116 wrote to memory of 936	1116	Client.exe	48
PID 1116 wrote to memory of 936	1116	Client.exe	48

C:\Users\Admin\AppData\Local\Temp\1528a6080656c5a8cf440d976047d7fa31e93e483c10142f416108f211145ff0.exe
"C:\Users\Admin\AppData\Local\Temp\1528a6080656c5a8cf440d976047d7fa31e93e483c10142f416108f211145ff0.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1952
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\1528a6080656c5a8cf440d976047d7fa31e93e483c10142f416108f211145ff0.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2744
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\OLHTuSLw.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1820
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\OLHTuSLw" /XML "C:\Users\Admin\AppData\Local\Temp\tmp4E3F.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:2736
- C:\Users\Admin\AppData\Local\Temp\1528a6080656c5a8cf440d976047d7fa31e93e483c10142f416108f211145ff0.exe
  "C:\Users\Admin\AppData\Local\Temp\1528a6080656c5a8cf440d976047d7fa31e93e483c10142f416108f211145ff0.exe"
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:576
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2952
- - C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
    "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:1624
  - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
      4⤵
      Command and Scripting Interpreter: PowerShell
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:772
  - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\OLHTuSLw.exe"
      4⤵
      Command and Scripting Interpreter: PowerShell
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:952
  - - C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\OLHTuSLw" /XML "C:\Users\Admin\AppData\Local\Temp\tmpA3AF.tmp"
      4⤵
      System Location Discovery: System Language Discovery
      Scheduled Task/Job: Scheduled Task
      PID:804
  - - C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
      "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
      4⤵
      Executes dropped EXE
      System Location Discovery: System Language Discovery
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of SetWindowsHookEx
      Suspicious use of WriteProcessMemory
      PID:1116
    - - C:\Windows\SysWOW64\schtasks.exe
        
        "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
        5⤵
        System Location Discovery: System Language Discovery
        Scheduled Task/Job: Scheduled Task
        
        PID:936

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Credential Access

Discovery

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\Temp\tmp4E3F.tmp

Filesize
1KB

MD5
4fdf540866031e78a8244f96993eae3d

SHA1
19def57a4bb22c1365a6b547838346c35a6abd21

SHA256
e4b34a8bb3df2c7a851c6072052bc99158e38137907576c1c35c26a3a1f69b2e

SHA512
e82c24e4bae3c7d24e69ba9b1381fdefeac72f79f3d1b4f34c43949488b44bbff20d92881bdbf7e9dda40b293791b10eefc9215230dc79725495d1796839d4f1

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\d93f411851d7c929.customDestinations-ms

Filesize
7KB

MD5
6b10b394e839a25b58f34e0b57aaf2f2

SHA1
785a9fa5e4469114b625e57df3da45d14695f2ef

SHA256
ccbdb29be05ef4507bb0ad1830d584e5e81a9c7b02f7d6e340bb9d44a665db31

SHA512
01496997dfc5167b75a6d2bfc2b782d94290235d8457603ec12d9b5c346d4aee4c0c9521054d0ae1e94761f1fdafbd056af0da99ddf8d91f2a1135236fcda091

Download Submit
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe

Filesize
3.8MB

MD5
df29ee043d88f265cd76747f62ab3ea7

SHA1
0594a814e05c80618a72a865fa53d24fd351db5b

SHA256
1528a6080656c5a8cf440d976047d7fa31e93e483c10142f416108f211145ff0

SHA512
7826bc0582819fb165b25c21fd5a9385b47332201a464b8ae4a035d65f0b3c7ece75507ba0acfa92a6e8b55f2a18ba83344dbf3db264be7d43d3beb5796384a1

Download Submit
memory/576-23-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/576-25-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/576-19-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/576-21-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/576-28-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/576-29-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/576-32-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/576-27-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/1116-62-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/1624-40-0x0000000001200000-0x00000000015D0000-memory.dmp

Filesize
3.8MB

Download
memory/1952-2-0x0000000074450000-0x0000000074B3E000-memory.dmp

Filesize
6.9MB

Download
memory/1952-31-0x0000000074450000-0x0000000074B3E000-memory.dmp

Filesize
6.9MB

Download
memory/1952-0-0x000000007445E000-0x000000007445F000-memory.dmp

Filesize
4KB

Download
memory/1952-4-0x000000007445E000-0x000000007445F000-memory.dmp

Filesize
4KB

Download
memory/1952-3-0x0000000000440000-0x000000000045A000-memory.dmp

Filesize
104KB

Download
memory/1952-1-0x0000000000D30000-0x0000000001100000-memory.dmp

Filesize
3.8MB

Download
memory/1952-6-0x0000000008EF0000-0x0000000009258000-memory.dmp

Filesize
3.4MB

Download
memory/1952-5-0x0000000074450000-0x0000000074B3E000-memory.dmp

Filesize
6.9MB

Download