quasar | c75b5b56db4572b061ba8a096e58e43a9cd4d47203ceb2152ae03646a7cb8694

Analysis

max time kernel
122s
max time network
123s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
28-12-2024 10:37

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General

Target

SeronTest.exe
Size

3.1MB
MD5

48acd4292ff6945cfc14c1c9fd9a764e
SHA1

5e4c15dfd00432fcb731ac0fa4190cda1d314e0e
SHA256

c75b5b56db4572b061ba8a096e58e43a9cd4d47203ceb2152ae03646a7cb8694
SHA512

e3a6b1c58dcf80d40f25dc434b9260ef1e35e904b1592e8b21dcad34cb8ffe8362b6243c89b78721f2d8c17e0e69cebd2272d47e2fcb05ffaa0aa5b00516f845
SSDEEP

98304:J7NGe5a2R/OYslkwkzycLcAI6jfdZhETdC:JNTg2RtsllkecYANjffhETg

Score

10^/10

quasar seron discovery execution spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Seron

nigeboc465-58875.portmap.host:58875

Mutex

eb8602ec-8a0d-4322-b9a0-544571be5a2d

Attributes

encryption_key
8BD9150EEC3DA71ED82080D7AEB7C165A58C889F
install_name
f8mk7ZGwVUpulm.exe
log_directory
Logs
reconnect_delay
3000
startup_key
f8mk7ZGwVUpulm
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/2712-12-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar
behavioral1/memory/2712-10-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar
behavioral1/memory/2712-18-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar
behavioral1/memory/2712-16-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar
behavioral1/memory/2712-15-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2676	f8mk7ZGwVUpulm.exe

Loads dropped DLL 1 IoCs

pid	Process
2712	RegAsm.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
2168	powershell.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1812 set thread context of 2712	1812	SeronTest.exe	35

System Location Discovery: System Language Discovery 1 TTPs 7 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	SeronTest.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegAsm.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	f8mk7ZGwVUpulm.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
2812	schtasks.exe
2548	schtasks.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1812	SeronTest.exe
2168	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1812	SeronTest.exe
Token: SeDebugPrivilege	2168	powershell.exe
Token: SeDebugPrivilege	2712	RegAsm.exe

Suspicious use of WriteProcessMemory 32 IoCs

description	pid	Process	procid_target
PID 1812 wrote to memory of 2168	1812	SeronTest.exe	30
PID 1812 wrote to memory of 2168	1812	SeronTest.exe	30
PID 1812 wrote to memory of 2168	1812	SeronTest.exe	30
PID 1812 wrote to memory of 2168	1812	SeronTest.exe	30
PID 1812 wrote to memory of 2800	1812	SeronTest.exe	32
PID 1812 wrote to memory of 2800	1812	SeronTest.exe	32
PID 1812 wrote to memory of 2800	1812	SeronTest.exe	32
PID 1812 wrote to memory of 2800	1812	SeronTest.exe	32
PID 2800 wrote to memory of 2812	2800	cmd.exe	34
PID 2800 wrote to memory of 2812	2800	cmd.exe	34
PID 2800 wrote to memory of 2812	2800	cmd.exe	34
PID 2800 wrote to memory of 2812	2800	cmd.exe	34
PID 1812 wrote to memory of 2712	1812	SeronTest.exe	35
PID 1812 wrote to memory of 2712	1812	SeronTest.exe	35
PID 1812 wrote to memory of 2712	1812	SeronTest.exe	35
PID 1812 wrote to memory of 2712	1812	SeronTest.exe	35
PID 1812 wrote to memory of 2712	1812	SeronTest.exe	35
PID 1812 wrote to memory of 2712	1812	SeronTest.exe	35
PID 1812 wrote to memory of 2712	1812	SeronTest.exe	35
PID 1812 wrote to memory of 2712	1812	SeronTest.exe	35
PID 1812 wrote to memory of 2712	1812	SeronTest.exe	35
PID 1812 wrote to memory of 2712	1812	SeronTest.exe	35
PID 1812 wrote to memory of 2712	1812	SeronTest.exe	35
PID 1812 wrote to memory of 2712	1812	SeronTest.exe	35
PID 2712 wrote to memory of 2548	2712	RegAsm.exe	36
PID 2712 wrote to memory of 2548	2712	RegAsm.exe	36
PID 2712 wrote to memory of 2548	2712	RegAsm.exe	36
PID 2712 wrote to memory of 2548	2712	RegAsm.exe	36
PID 2712 wrote to memory of 2676	2712	RegAsm.exe	38
PID 2712 wrote to memory of 2676	2712	RegAsm.exe	38
PID 2712 wrote to memory of 2676	2712	RegAsm.exe	38
PID 2712 wrote to memory of 2676	2712	RegAsm.exe	38

C:\Users\Admin\AppData\Local\Temp\SeronTest.exe
"C:\Users\Admin\AppData\Local\Temp\SeronTest.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1812
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Remove -ItemProperty -Path 'HKCU:\SOFTWARE\Microsoft\Windows\CurrentVersion\Run' -Name '';New-ItemProperty -Path 'HKCU:\SOFTWARE\Microsoft\Windows\CurrentVersion\Run' -Name '' -Value '"C:\Users\Admin\AppData\Roaming\.exe"' -PropertyType 'String'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2168
- C:\Windows\SysWOW64\cmd.exe
  "cmd" /C schtasks /create /tn \ /tr "C:\Users\Admin\AppData\Roaming\.exe" /st 00:00 /du 9999:59 /sc once /ri 60 /rl HIGHEST /f
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2800
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /tn \ /tr "C:\Users\Admin\AppData\Roaming\.exe" /st 00:00 /du 9999:59 /sc once /ri 60 /rl HIGHEST /f
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2812
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  #cmd
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2712
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks" /create /tn "f8mk7ZGwVUpulm" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\f8mk7ZGwVUpulm.exe" /rl HIGHEST /f
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2548
- - C:\Users\Admin\AppData\Roaming\SubDir\f8mk7ZGwVUpulm.exe
    "C:\Users\Admin\AppData\Roaming\SubDir\f8mk7ZGwVUpulm.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:2676

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 Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

\Users\Admin\AppData\Roaming\SubDir\f8mk7ZGwVUpulm.exe

Filesize
63KB

MD5
b58b926c3574d28d5b7fdd2ca3ec30d5

SHA1
d260c4ffd603a9cfc057fcb83d678b1cecdf86f9

SHA256
6e70b56d748c4ccab13cc8a055d3795ea0dd95fe3b70568d7d3ac0c6621140a3

SHA512
b13cb998822b716b695013bcd6dec62a2290567d0d1743b2d982ca084235cf69c6ea1fc91c9d4e62657c6f9e102c7c60e81296ab055ffe43b887c5f8ec8958ab

Download Submit
memory/1812-0-0x0000000074BEE000-0x0000000074BEF000-memory.dmp

Filesize
4KB

Download
memory/1812-1-0x00000000002A0000-0x00000000005C8000-memory.dmp

Filesize
3.2MB

Download
memory/1812-5-0x0000000074BE0000-0x00000000752CE000-memory.dmp

Filesize
6.9MB

Download
memory/1812-19-0x0000000074BE0000-0x00000000752CE000-memory.dmp

Filesize
6.9MB

Download
memory/2676-27-0x00000000003A0000-0x00000000003B2000-memory.dmp

Filesize
72KB

Download
memory/2712-6-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/2712-14-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2712-8-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/2712-18-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/2712-16-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/2712-15-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/2712-10-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/2712-12-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download