quasar | 35d51e82e11a00d9bad3dab068867af8ea3b9859aee47ffd0d1e92a06afd6859

Analysis

max time kernel
119s
max time network
120s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
28-12-2024 09:49

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General

Target

SeronTest.exe
Size

3.1MB
MD5

40d84af5b3499ad8d4485b8839db2f1e
SHA1

beba1013f026a44d45e15aaefb947cc40132d38d
SHA256

35d51e82e11a00d9bad3dab068867af8ea3b9859aee47ffd0d1e92a06afd6859
SHA512

4b7af63b4bbfd65584990bf14b7cf7088c7359dd5ff3d5d14c92d70c024e7c9ff8ecc9752cf830a2740fd2d30b88581083d81be6734492a29fcc6e211d1af07c
SSDEEP

49152:oee9cfJdeuEJD4iVUdzb7BGpNG+26vllqJ44hTorj+XyJ2pFnRcEHyaNkfc/hS4m:JgcRIjJDDVozb7BPCbGyrvJenyLyMmV

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/588-18-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar
behavioral1/memory/588-16-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar
behavioral1/memory/588-15-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar
behavioral1/memory/588-12-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar
behavioral1/memory/588-10-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2624	f8mk7ZGwVUpulm.exe

Loads dropped DLL 1 IoCs

pid	Process
588	RegAsm.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
2220	powershell.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1724 set thread context of 588	1724	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	f8mk7ZGwVUpulm.exe
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

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
2248	schtasks.exe
2880	schtasks.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1724	SeronTest.exe
2220	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1724	SeronTest.exe
Token: SeDebugPrivilege	588	RegAsm.exe
Token: SeDebugPrivilege	2220	powershell.exe

Suspicious use of WriteProcessMemory 32 IoCs

description	pid	Process	procid_target
PID 1724 wrote to memory of 2220	1724	SeronTest.exe	30
PID 1724 wrote to memory of 2220	1724	SeronTest.exe	30
PID 1724 wrote to memory of 2220	1724	SeronTest.exe	30
PID 1724 wrote to memory of 2220	1724	SeronTest.exe	30
PID 1724 wrote to memory of 1320	1724	SeronTest.exe	32
PID 1724 wrote to memory of 1320	1724	SeronTest.exe	32
PID 1724 wrote to memory of 1320	1724	SeronTest.exe	32
PID 1724 wrote to memory of 1320	1724	SeronTest.exe	32
PID 1320 wrote to memory of 2248	1320	cmd.exe	34
PID 1320 wrote to memory of 2248	1320	cmd.exe	34
PID 1320 wrote to memory of 2248	1320	cmd.exe	34
PID 1320 wrote to memory of 2248	1320	cmd.exe	34
PID 1724 wrote to memory of 588	1724	SeronTest.exe	35
PID 1724 wrote to memory of 588	1724	SeronTest.exe	35
PID 1724 wrote to memory of 588	1724	SeronTest.exe	35
PID 1724 wrote to memory of 588	1724	SeronTest.exe	35
PID 1724 wrote to memory of 588	1724	SeronTest.exe	35
PID 1724 wrote to memory of 588	1724	SeronTest.exe	35
PID 1724 wrote to memory of 588	1724	SeronTest.exe	35
PID 1724 wrote to memory of 588	1724	SeronTest.exe	35
PID 1724 wrote to memory of 588	1724	SeronTest.exe	35
PID 1724 wrote to memory of 588	1724	SeronTest.exe	35
PID 1724 wrote to memory of 588	1724	SeronTest.exe	35
PID 1724 wrote to memory of 588	1724	SeronTest.exe	35
PID 588 wrote to memory of 2880	588	RegAsm.exe	36
PID 588 wrote to memory of 2880	588	RegAsm.exe	36
PID 588 wrote to memory of 2880	588	RegAsm.exe	36
PID 588 wrote to memory of 2880	588	RegAsm.exe	36
PID 588 wrote to memory of 2624	588	RegAsm.exe	38
PID 588 wrote to memory of 2624	588	RegAsm.exe	38
PID 588 wrote to memory of 2624	588	RegAsm.exe	38
PID 588 wrote to memory of 2624	588	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:1724
- 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:2220
- 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:1320
- - 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:2248
- 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:588
- - 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:2880
- - 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:2624

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/588-16-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/588-6-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/588-18-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/588-15-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/588-14-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/588-12-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/588-10-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/588-8-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/1724-3-0x0000000074630000-0x0000000074D1E000-memory.dmp

Filesize
6.9MB

Download
memory/1724-19-0x0000000074630000-0x0000000074D1E000-memory.dmp

Filesize
6.9MB

Download
memory/1724-0-0x000000007463E000-0x000000007463F000-memory.dmp

Filesize
4KB

Download
memory/1724-1-0x0000000000C40000-0x0000000000F68000-memory.dmp

Filesize
3.2MB

Download
memory/2624-27-0x0000000000850000-0x0000000000862000-memory.dmp

Filesize
72KB

Download