quasar | c75b5b56db4572b061ba8a096e58e43a9cd4d47203ceb2152ae03646a7cb8694

Analysis

max time kernel
32s
max time network
33s
platform
windows10-ltsc 2021_x64
resource
win10ltsc2021-20241211-en
resource tags

arch:x64arch:x86image:win10ltsc2021-20241211-enlocale:en-usos:windows10-ltsc 2021-x64system
submitted
28-12-2024 10:34

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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 1 IoCs

resource	yara_rule
behavioral1/memory/3412-8-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
4168	f8mk7ZGwVUpulm.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
252	powershell.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 5080 set thread context of 3412	5080	SeronTest.exe	87

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	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.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	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	f8mk7ZGwVUpulm.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	SeronTest.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
2380	schtasks.exe
2368	schtasks.exe

Suspicious behavior: EnumeratesProcesses 7 IoCs

pid	Process
5080	SeronTest.exe
5080	SeronTest.exe
5080	SeronTest.exe
5080	SeronTest.exe
5080	SeronTest.exe
252	powershell.exe
252	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	5080	SeronTest.exe
Token: SeDebugPrivilege	252	powershell.exe
Token: SeDebugPrivilege	3412	RegAsm.exe

Suspicious use of WriteProcessMemory 29 IoCs

description	pid	Process	procid_target
PID 5080 wrote to memory of 252	5080	SeronTest.exe	81
PID 5080 wrote to memory of 252	5080	SeronTest.exe	81
PID 5080 wrote to memory of 252	5080	SeronTest.exe	81
PID 5080 wrote to memory of 224	5080	SeronTest.exe	82
PID 5080 wrote to memory of 224	5080	SeronTest.exe	82
PID 5080 wrote to memory of 224	5080	SeronTest.exe	82
PID 5080 wrote to memory of 3964	5080	SeronTest.exe	85
PID 5080 wrote to memory of 3964	5080	SeronTest.exe	85
PID 5080 wrote to memory of 3964	5080	SeronTest.exe	85
PID 5080 wrote to memory of 2984	5080	SeronTest.exe	86
PID 5080 wrote to memory of 2984	5080	SeronTest.exe	86
PID 5080 wrote to memory of 2984	5080	SeronTest.exe	86
PID 5080 wrote to memory of 3412	5080	SeronTest.exe	87
PID 5080 wrote to memory of 3412	5080	SeronTest.exe	87
PID 5080 wrote to memory of 3412	5080	SeronTest.exe	87
PID 5080 wrote to memory of 3412	5080	SeronTest.exe	87
PID 5080 wrote to memory of 3412	5080	SeronTest.exe	87
PID 5080 wrote to memory of 3412	5080	SeronTest.exe	87
PID 5080 wrote to memory of 3412	5080	SeronTest.exe	87
PID 5080 wrote to memory of 3412	5080	SeronTest.exe	87
PID 224 wrote to memory of 2380	224	cmd.exe	88
PID 224 wrote to memory of 2380	224	cmd.exe	88
PID 224 wrote to memory of 2380	224	cmd.exe	88
PID 3412 wrote to memory of 2368	3412	RegAsm.exe	89
PID 3412 wrote to memory of 2368	3412	RegAsm.exe	89
PID 3412 wrote to memory of 2368	3412	RegAsm.exe	89
PID 3412 wrote to memory of 4168	3412	RegAsm.exe	91
PID 3412 wrote to memory of 4168	3412	RegAsm.exe	91
PID 3412 wrote to memory of 4168	3412	RegAsm.exe	91

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:5080
- 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:252
- 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:224
- - 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:2380
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  #cmd
  2⤵
  PID:3964
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  #cmd
  2⤵
  PID:2984
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  #cmd
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3412
- - 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:2368
- - 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:4168

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

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_pizltul2.x5h.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Roaming\SubDir\f8mk7ZGwVUpulm.exe

Filesize
63KB

MD5
0d5df43af2916f47d00c1573797c1a13

SHA1
230ab5559e806574d26b4c20847c368ed55483b0

SHA256
c066aee7aa3aa83f763ebc5541daa266ed6c648fbffcde0d836a13b221bb2adc

SHA512
f96cf9e1890746b12daf839a6d0f16f062b72c1b8a40439f96583f242980f10f867720232a6fa0f7d4d7ac0a7a6143981a5a130d6417ea98b181447134c7cfe2

Download Submit
memory/252-48-0x00000000078B0000-0x0000000007953000-memory.dmp

Filesize
652KB

Download
memory/252-51-0x0000000007A30000-0x0000000007A3A000-memory.dmp

Filesize
40KB

Download
memory/252-6-0x00000000750C0000-0x0000000075871000-memory.dmp

Filesize
7.7MB

Download
memory/252-30-0x00000000069A0000-0x00000000069EC000-memory.dmp

Filesize
304KB

Download
memory/252-10-0x0000000005770000-0x0000000005E3A000-memory.dmp

Filesize
6.8MB

Download
memory/252-61-0x00000000750C0000-0x0000000075871000-memory.dmp

Filesize
7.7MB

Download
memory/252-57-0x0000000007C30000-0x0000000007C38000-memory.dmp

Filesize
32KB

Download
memory/252-56-0x0000000007C40000-0x0000000007C5A000-memory.dmp

Filesize
104KB

Download
memory/252-5-0x0000000004F80000-0x0000000004FB6000-memory.dmp

Filesize
216KB

Download
memory/252-55-0x0000000007C00000-0x0000000007C14000-memory.dmp

Filesize
80KB

Download
memory/252-54-0x0000000007BF0000-0x0000000007BFE000-memory.dmp

Filesize
56KB

Download
memory/252-53-0x0000000007BB0000-0x0000000007BC1000-memory.dmp

Filesize
68KB

Download
memory/252-27-0x00000000060C0000-0x0000000006126000-memory.dmp

Filesize
408KB

Download
memory/252-26-0x0000000006050000-0x00000000060B6000-memory.dmp

Filesize
408KB

Download
memory/252-52-0x0000000007C90000-0x0000000007D26000-memory.dmp

Filesize
600KB

Download
memory/252-28-0x0000000006130000-0x0000000006487000-memory.dmp

Filesize
3.3MB

Download
memory/252-20-0x0000000005FA0000-0x0000000005FC2000-memory.dmp

Filesize
136KB

Download
memory/252-29-0x00000000065E0000-0x00000000065FE000-memory.dmp

Filesize
120KB

Download
memory/252-7-0x00000000750C0000-0x0000000075871000-memory.dmp

Filesize
7.7MB

Download
memory/252-58-0x0000000007D30000-0x0000000007D52000-memory.dmp

Filesize
136KB

Download
memory/252-46-0x00000000077D0000-0x00000000077EE000-memory.dmp

Filesize
120KB

Download
memory/252-50-0x00000000079D0000-0x00000000079EA000-memory.dmp

Filesize
104KB

Download
memory/252-36-0x0000000072B70000-0x0000000072BBC000-memory.dmp

Filesize
304KB

Download
memory/252-49-0x0000000008010000-0x000000000868A000-memory.dmp

Filesize
6.5MB

Download
memory/252-34-0x00000000077F0000-0x0000000007822000-memory.dmp

Filesize
200KB

Download
memory/3412-33-0x00000000750C0000-0x0000000075871000-memory.dmp

Filesize
7.7MB

Download
memory/3412-21-0x00000000050E0000-0x00000000050EA000-memory.dmp

Filesize
40KB

Download
memory/3412-22-0x00000000750C0000-0x0000000075871000-memory.dmp

Filesize
7.7MB

Download
memory/3412-13-0x0000000005160000-0x00000000051F2000-memory.dmp

Filesize
584KB

Download
memory/3412-8-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/3412-12-0x00000000750C0000-0x0000000075871000-memory.dmp

Filesize
7.7MB

Download
memory/4168-35-0x00000000007A0000-0x00000000007B2000-memory.dmp

Filesize
72KB

Download
memory/5080-0-0x00000000750CE000-0x00000000750CF000-memory.dmp

Filesize
4KB

Download
memory/5080-4-0x00000000750C0000-0x0000000075871000-memory.dmp

Filesize
7.7MB

Download
memory/5080-2-0x0000000005E50000-0x00000000063F6000-memory.dmp

Filesize
5.6MB

Download
memory/5080-1-0x0000000000B00000-0x0000000000E28000-memory.dmp

Filesize
3.2MB

Download
memory/5080-11-0x00000000750C0000-0x0000000075871000-memory.dmp

Filesize
7.7MB

Download