quasar | 124eb5a9a5cc2692be7765cac6afdb191ec0eb8e860f5cd12c311299df10fe17

Analysis

max time kernel
136s
max time network
138s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
15-01-2025 02:10

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General

Target

RFQ.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/988-23-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar
behavioral1/memory/988-28-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar
behavioral1/memory/988-25-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar
behavioral1/memory/988-29-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar
behavioral1/memory/988-31-0x0000000000400000-0x0000000000724000-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
2096	powershell.exe
2364	powershell.exe
1236	powershell.exe
2632	powershell.exe

Executes dropped EXE 2 IoCs

pid	Process
2008	Client.exe
2108	Client.exe

Loads dropped DLL 2 IoCs

pid	Process
988	RFQ.exe
2008	Client.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 944 set thread context of 988	944	RFQ.exe	38
PID 2008 set thread context of 2108	2008	Client.exe	48

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	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	Client.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RFQ.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	Client.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RFQ.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.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
2796	schtasks.exe
3008	schtasks.exe
2772	schtasks.exe
444	schtasks.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
944	RFQ.exe
944	RFQ.exe
2364	powershell.exe
2096	powershell.exe
2632	powershell.exe
1236	powershell.exe

Suspicious use of AdjustPrivilegeToken 7 IoCs

description	pid	Process
Token: SeDebugPrivilege	944	RFQ.exe
Token: SeDebugPrivilege	2364	powershell.exe
Token: SeDebugPrivilege	2096	powershell.exe
Token: SeDebugPrivilege	988	RFQ.exe
Token: SeDebugPrivilege	2632	powershell.exe
Token: SeDebugPrivilege	1236	powershell.exe
Token: SeDebugPrivilege	2108	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2108	Client.exe

Suspicious use of WriteProcessMemory 58 IoCs

description	pid	Process	procid_target
PID 944 wrote to memory of 2096	944	RFQ.exe	31
PID 944 wrote to memory of 2096	944	RFQ.exe	31
PID 944 wrote to memory of 2096	944	RFQ.exe	31
PID 944 wrote to memory of 2096	944	RFQ.exe	31
PID 944 wrote to memory of 2364	944	RFQ.exe	33
PID 944 wrote to memory of 2364	944	RFQ.exe	33
PID 944 wrote to memory of 2364	944	RFQ.exe	33
PID 944 wrote to memory of 2364	944	RFQ.exe	33
PID 944 wrote to memory of 2796	944	RFQ.exe	35
PID 944 wrote to memory of 2796	944	RFQ.exe	35
PID 944 wrote to memory of 2796	944	RFQ.exe	35
PID 944 wrote to memory of 2796	944	RFQ.exe	35
PID 944 wrote to memory of 2568	944	RFQ.exe	37
PID 944 wrote to memory of 2568	944	RFQ.exe	37
PID 944 wrote to memory of 2568	944	RFQ.exe	37
PID 944 wrote to memory of 2568	944	RFQ.exe	37
PID 944 wrote to memory of 988	944	RFQ.exe	38
PID 944 wrote to memory of 988	944	RFQ.exe	38
PID 944 wrote to memory of 988	944	RFQ.exe	38
PID 944 wrote to memory of 988	944	RFQ.exe	38
PID 944 wrote to memory of 988	944	RFQ.exe	38
PID 944 wrote to memory of 988	944	RFQ.exe	38
PID 944 wrote to memory of 988	944	RFQ.exe	38
PID 944 wrote to memory of 988	944	RFQ.exe	38
PID 944 wrote to memory of 988	944	RFQ.exe	38
PID 988 wrote to memory of 3008	988	RFQ.exe	39
PID 988 wrote to memory of 3008	988	RFQ.exe	39
PID 988 wrote to memory of 3008	988	RFQ.exe	39
PID 988 wrote to memory of 3008	988	RFQ.exe	39
PID 988 wrote to memory of 2008	988	RFQ.exe	41
PID 988 wrote to memory of 2008	988	RFQ.exe	41
PID 988 wrote to memory of 2008	988	RFQ.exe	41
PID 988 wrote to memory of 2008	988	RFQ.exe	41
PID 2008 wrote to memory of 1236	2008	Client.exe	42
PID 2008 wrote to memory of 1236	2008	Client.exe	42
PID 2008 wrote to memory of 1236	2008	Client.exe	42
PID 2008 wrote to memory of 1236	2008	Client.exe	42
PID 2008 wrote to memory of 2632	2008	Client.exe	43
PID 2008 wrote to memory of 2632	2008	Client.exe	43
PID 2008 wrote to memory of 2632	2008	Client.exe	43
PID 2008 wrote to memory of 2632	2008	Client.exe	43
PID 2008 wrote to memory of 2772	2008	Client.exe	44
PID 2008 wrote to memory of 2772	2008	Client.exe	44
PID 2008 wrote to memory of 2772	2008	Client.exe	44
PID 2008 wrote to memory of 2772	2008	Client.exe	44
PID 2008 wrote to memory of 2108	2008	Client.exe	48
PID 2008 wrote to memory of 2108	2008	Client.exe	48
PID 2008 wrote to memory of 2108	2008	Client.exe	48
PID 2008 wrote to memory of 2108	2008	Client.exe	48
PID 2008 wrote to memory of 2108	2008	Client.exe	48
PID 2008 wrote to memory of 2108	2008	Client.exe	48
PID 2008 wrote to memory of 2108	2008	Client.exe	48
PID 2008 wrote to memory of 2108	2008	Client.exe	48
PID 2008 wrote to memory of 2108	2008	Client.exe	48
PID 2108 wrote to memory of 444	2108	Client.exe	49
PID 2108 wrote to memory of 444	2108	Client.exe	49
PID 2108 wrote to memory of 444	2108	Client.exe	49
PID 2108 wrote to memory of 444	2108	Client.exe	49

C:\Users\Admin\AppData\Local\Temp\RFQ.exe
"C:\Users\Admin\AppData\Local\Temp\RFQ.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:944
- 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\RFQ.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2096
- 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:2364
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\OLHTuSLw" /XML "C:\Users\Admin\AppData\Local\Temp\tmp2674.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:2796
- C:\Users\Admin\AppData\Local\Temp\RFQ.exe
  "C:\Users\Admin\AppData\Local\Temp\RFQ.exe"
  2⤵
  PID:2568
- C:\Users\Admin\AppData\Local\Temp\RFQ.exe
  "C:\Users\Admin\AppData\Local\Temp\RFQ.exe"
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:988
- - 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:3008
- - 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:2008
  - - 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:1236
  - - 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:2632
  - - C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\OLHTuSLw" /XML "C:\Users\Admin\AppData\Local\Temp\tmp6AC4.tmp"
      4⤵
      System Location Discovery: System Language Discovery
      Scheduled Task/Job: Scheduled Task
      PID:2772
  - - 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:2108
    - - 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:444

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

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp2674.tmp

Filesize
1KB

MD5
d25604e483873e89b7ba47a6be161da0

SHA1
143b088a9a67a88d5291301b544267569a860327

SHA256
b62b12f28e0c5faad697fe76010ecd1038f3317e34044536006cc1b8e858a5f5

SHA512
84cb39fe4b6266073a6004068e5e7c3f24d15c01051b8c5711eba93cf9d20d1221992e2b6b272152045fa30391ea2f989f949fd7b6a453e0a375aae45a2a9945

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\GD869D8W8UU5XZQ55FEC.temp

Filesize
7KB

MD5
3e439c5f61590fd697aee2275cb0bc9a

SHA1
e2bbd77922f1640d2e9577cb87e93c442d3421c2

SHA256
d3e5f0c966c9a8122484389f13eadfbde7f06bb48c298070e5043ae7c5e990b3

SHA512
97893f68d6a3626b1cb379dd6f32d9cf762c29d8faad57d75e24e8b05e71bf1aaf46a272fe044c4e05cda61ff2760c62d00a5c4c676757e306de7534eca3c0b1

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

Filesize
3.8MB

MD5
df29ee043d88f265cd76747f62ab3ea7

SHA1
0594a814e05c80618a72a865fa53d24fd351db5b

SHA256
1528a6080656c5a8cf440d976047d7fa31e93e483c10142f416108f211145ff0

SHA512
7826bc0582819fb165b25c21fd5a9385b47332201a464b8ae4a035d65f0b3c7ece75507ba0acfa92a6e8b55f2a18ba83344dbf3db264be7d43d3beb5796384a1

Download Submit
memory/944-32-0x0000000074240000-0x000000007492E000-memory.dmp

Filesize
6.9MB

Download
memory/944-1-0x0000000000F30000-0x0000000001300000-memory.dmp

Filesize
3.8MB

Download
memory/944-2-0x0000000074240000-0x000000007492E000-memory.dmp

Filesize
6.9MB

Download
memory/944-3-0x0000000000520000-0x000000000053A000-memory.dmp

Filesize
104KB

Download
memory/944-4-0x000000007424E000-0x000000007424F000-memory.dmp

Filesize
4KB

Download
memory/944-5-0x0000000074240000-0x000000007492E000-memory.dmp

Filesize
6.9MB

Download
memory/944-6-0x0000000008FB0000-0x0000000009318000-memory.dmp

Filesize
3.4MB

Download
memory/944-0-0x000000007424E000-0x000000007424F000-memory.dmp

Filesize
4KB

Download
memory/988-19-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/988-28-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/988-27-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/988-25-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/988-29-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/988-31-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/988-21-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/988-23-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/2008-40-0x0000000000A00000-0x0000000000DD0000-memory.dmp

Filesize
3.8MB

Download
memory/2108-62-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download