quasar | 35d51e82e11a00d9bad3dab068867af8ea3b9859aee47ffd0d1e92a06afd6859

Analysis

max time kernel
92s
max time network
95s
platform
windows11-21h2_x64
resource
win11-20241007-en
resource tags

arch:x64arch:x86image:win11-20241007-enlocale:en-usos:windows11-21h2-x64system
submitted
28-12-2024 09:46

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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 1 IoCs

resource	yara_rule
behavioral2/memory/2288-7-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2432	f8mk7ZGwVUpulm.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
3528	powershell.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3916 set thread context of 2288	3916	SeronTest.exe	82

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	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
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

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
5052	schtasks.exe
928	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
3916	SeronTest.exe
3528	powershell.exe
3528	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	3916	SeronTest.exe
Token: SeDebugPrivilege	3528	powershell.exe
Token: SeDebugPrivilege	2288	RegAsm.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 3916 wrote to memory of 3528	3916	SeronTest.exe	77
PID 3916 wrote to memory of 3528	3916	SeronTest.exe	77
PID 3916 wrote to memory of 3528	3916	SeronTest.exe	77
PID 3916 wrote to memory of 4796	3916	SeronTest.exe	79
PID 3916 wrote to memory of 4796	3916	SeronTest.exe	79
PID 3916 wrote to memory of 4796	3916	SeronTest.exe	79
PID 4796 wrote to memory of 928	4796	cmd.exe	81
PID 4796 wrote to memory of 928	4796	cmd.exe	81
PID 4796 wrote to memory of 928	4796	cmd.exe	81
PID 3916 wrote to memory of 2288	3916	SeronTest.exe	82
PID 3916 wrote to memory of 2288	3916	SeronTest.exe	82
PID 3916 wrote to memory of 2288	3916	SeronTest.exe	82
PID 3916 wrote to memory of 2288	3916	SeronTest.exe	82
PID 3916 wrote to memory of 2288	3916	SeronTest.exe	82
PID 3916 wrote to memory of 2288	3916	SeronTest.exe	82
PID 3916 wrote to memory of 2288	3916	SeronTest.exe	82
PID 3916 wrote to memory of 2288	3916	SeronTest.exe	82
PID 2288 wrote to memory of 5052	2288	RegAsm.exe	83
PID 2288 wrote to memory of 5052	2288	RegAsm.exe	83
PID 2288 wrote to memory of 5052	2288	RegAsm.exe	83
PID 2288 wrote to memory of 2432	2288	RegAsm.exe	85
PID 2288 wrote to memory of 2432	2288	RegAsm.exe	85
PID 2288 wrote to memory of 2432	2288	RegAsm.exe	85

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:3916
- 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:3528
- 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:4796
- - 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:928
- 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:2288
- - 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:5052
- - 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:2432

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_fxraszp0.csk.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

Filesize
63KB

MD5
42ab6e035df99a43dbb879c86b620b91

SHA1
c6e116569d17d8142dbb217b1f8bfa95bc148c38

SHA256
53195987d396986ebcb20425ac130e78ad308fdbd918f33f3fd92b99abda314b

SHA512
2e79de2d394ad33023d71611bb728b254aa4680b5a3a1ef5282b1155ddfaa2f3585c840a6700dfe0d1a276dac801298431f0187086d2e8f96b22f6c808fb97e5

Download Submit
memory/2288-11-0x0000000005610000-0x00000000056A2000-memory.dmp

Filesize
584KB

Download
memory/2288-36-0x00000000746A0000-0x0000000074E51000-memory.dmp

Filesize
7.7MB

Download
memory/2288-26-0x00000000746A0000-0x0000000074E51000-memory.dmp

Filesize
7.7MB

Download
memory/2288-25-0x00000000746A0000-0x0000000074E51000-memory.dmp

Filesize
7.7MB

Download
memory/2288-7-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/2288-15-0x00000000057B0000-0x00000000057BA000-memory.dmp

Filesize
40KB

Download
memory/2432-35-0x00000000001C0000-0x00000000001D2000-memory.dmp

Filesize
72KB

Download
memory/3528-27-0x0000000005D10000-0x0000000005D2E000-memory.dmp

Filesize
120KB

Download
memory/3528-39-0x0000000071E20000-0x0000000071E6C000-memory.dmp

Filesize
304KB

Download
memory/3528-14-0x0000000005050000-0x00000000050B6000-memory.dmp

Filesize
408KB

Download
memory/3528-13-0x0000000004FE0000-0x0000000005046000-memory.dmp

Filesize
408KB

Download
memory/3528-10-0x00000000746A0000-0x0000000074E51000-memory.dmp

Filesize
7.7MB

Download
memory/3528-16-0x0000000005800000-0x0000000005B57000-memory.dmp

Filesize
3.3MB

Download
memory/3528-62-0x00000000746A0000-0x0000000074E51000-memory.dmp

Filesize
7.7MB

Download
memory/3528-5-0x00000000050D0000-0x00000000056FA000-memory.dmp

Filesize
6.2MB

Download
memory/3528-6-0x00000000746A0000-0x0000000074E51000-memory.dmp

Filesize
7.7MB

Download
memory/3528-59-0x0000000007450000-0x0000000007472000-memory.dmp

Filesize
136KB

Download
memory/3528-28-0x0000000005EE0000-0x0000000005F2C000-memory.dmp

Filesize
304KB

Download
memory/3528-4-0x0000000002500000-0x0000000002536000-memory.dmp

Filesize
216KB

Download
memory/3528-58-0x0000000007400000-0x0000000007408000-memory.dmp

Filesize
32KB

Download
memory/3528-57-0x0000000007410000-0x000000000742A000-memory.dmp

Filesize
104KB

Download
memory/3528-38-0x0000000006CA0000-0x0000000006CD4000-memory.dmp

Filesize
208KB

Download
memory/3528-12-0x0000000004E40000-0x0000000004E62000-memory.dmp

Filesize
136KB

Download
memory/3528-48-0x0000000006C80000-0x0000000006C9E000-memory.dmp

Filesize
120KB

Download
memory/3528-49-0x0000000006D60000-0x0000000006E04000-memory.dmp

Filesize
656KB

Download
memory/3528-50-0x0000000007700000-0x0000000007D7A000-memory.dmp

Filesize
6.5MB

Download
memory/3528-51-0x00000000070C0000-0x00000000070DA000-memory.dmp

Filesize
104KB

Download
memory/3528-52-0x0000000007140000-0x000000000714A000-memory.dmp

Filesize
40KB

Download
memory/3528-53-0x0000000007350000-0x00000000073E6000-memory.dmp

Filesize
600KB

Download
memory/3528-54-0x00000000072D0000-0x00000000072E1000-memory.dmp

Filesize
68KB

Download
memory/3528-55-0x0000000007300000-0x000000000730E000-memory.dmp

Filesize
56KB

Download
memory/3528-56-0x0000000007310000-0x0000000007325000-memory.dmp

Filesize
84KB

Download
memory/3916-1-0x0000000000BB0000-0x0000000000ED8000-memory.dmp

Filesize
3.2MB

Download
memory/3916-2-0x0000000005E00000-0x00000000063A6000-memory.dmp

Filesize
5.6MB

Download
memory/3916-0-0x00000000746AE000-0x00000000746AF000-memory.dmp

Filesize
4KB

Download
memory/3916-9-0x00000000746A0000-0x0000000074E51000-memory.dmp

Filesize
7.7MB

Download
memory/3916-63-0x00000000746A0000-0x0000000074E51000-memory.dmp

Filesize
7.7MB

Download