quasar | 742b7f6f9540d326cc531b10eee061dbe0bcb385ff1e0d6c854f6b1944be7a4c

Analysis

max time kernel
29s
max time network
27s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
01-01-2025 01:27

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General

Target

apc.exe
Size

10.0MB
MD5

1f207fcc72414a370519449b12e39a44
SHA1

0c3b895a73bbd8af2a759c8fa91a34a50a706e68
SHA256

d65b0f0fe9f34ed76a2a00737fba3b9b9613337cf3ba5c4d933844f67cdcd94f
SHA512

188f081a964e94e68247a5375c99398ad232188462a33df655c87cad48fbd1763e0f7378e5381040a3d04da2477a0492c31875a5819c57315de16e2865d5aa78
SSDEEP

196608:NlB9RAwnh0Lwl2srNygSRkpmY8jYIn2dEAI1RbQRVIbFN6UqeBmc1RL:TnRAGHHrekplInGdI1FQzxbeBNDL

Score

10^/10

quasar settings discovery execution spyware trojan

Malware Config

Extracted

Family

quasar

Version

2.1.0.0

Botnet

settings

xetica.ddns.net:4782

127.0.0.1:4782

samlit.ddns.net:4782

costic.bounceme.net:4782

Mutex

Cyber_Wire_hAivDNiQ0KExWgVVWh

Attributes

encryption_key
YK2lGttIrVUe0cTViKFu
install_name
settings.exe
log_directory
counterstrikego
reconnect_delay
3000
startup_key
counterstrikeload
subdirectory
counterstrikego

Signatures

Quasar RAT
Quasar is an open source Remote Access Tool.
trojan spyware quasar
Quasar family
quasar

Quasar payload 1 IoCs

resource	yara_rule
behavioral8/memory/1096-16-0x0000000000400000-0x000000000045E000-memory.dmp	family_quasar

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
1796	powershell.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 5012 set thread context of 1096	5012	apc.exe	101

System Location Discovery: System Language Discovery 1 TTPs 3 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	apc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegAsm.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
5012	apc.exe
5012	apc.exe
5012	apc.exe
5012	apc.exe
1796	powershell.exe
1796	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	5012	apc.exe
Token: SeDebugPrivilege	1796	powershell.exe
Token: SeDebugPrivilege	1096	RegAsm.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 5012 wrote to memory of 1796	5012	apc.exe	97
PID 5012 wrote to memory of 1796	5012	apc.exe	97
PID 5012 wrote to memory of 1796	5012	apc.exe	97
PID 5012 wrote to memory of 2848	5012	apc.exe	99
PID 5012 wrote to memory of 2848	5012	apc.exe	99
PID 5012 wrote to memory of 2848	5012	apc.exe	99
PID 5012 wrote to memory of 972	5012	apc.exe	100
PID 5012 wrote to memory of 972	5012	apc.exe	100
PID 5012 wrote to memory of 972	5012	apc.exe	100
PID 5012 wrote to memory of 1096	5012	apc.exe	101
PID 5012 wrote to memory of 1096	5012	apc.exe	101
PID 5012 wrote to memory of 1096	5012	apc.exe	101
PID 5012 wrote to memory of 1096	5012	apc.exe	101
PID 5012 wrote to memory of 1096	5012	apc.exe	101
PID 5012 wrote to memory of 1096	5012	apc.exe	101
PID 5012 wrote to memory of 1096	5012	apc.exe	101
PID 5012 wrote to memory of 1096	5012	apc.exe	101

C:\Users\Admin\AppData\Local\Temp\apc.exe
"C:\Users\Admin\AppData\Local\Temp\apc.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5012
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Remove-ItemProperty -Path 'HKCU:\SOFTWARE\Microsoft\Windows\CurrentVersion\Run' -Name 'steamAPC';New-ItemProperty -Path 'HKCU:\SOFTWARE\Microsoft\Windows\CurrentVersion\Run' -Name 'steamAPC' -Value '"C:\ProgramData\Microsoft\Windows\Templates\steamAPC\steamAPC.exe"' -PropertyType 'String'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1796
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
  2⤵
  PID:2848
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
  2⤵
  PID:972
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  PID:1096

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

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_3unpbcla.waj.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1096-16-0x0000000000400000-0x000000000045E000-memory.dmp

Filesize
376KB

Download
memory/1096-42-0x0000000006BC0000-0x0000000006BFC000-memory.dmp

Filesize
240KB

Download
memory/1096-36-0x0000000006780000-0x0000000006792000-memory.dmp

Filesize
72KB

Download
memory/1096-30-0x0000000075360000-0x0000000075B10000-memory.dmp

Filesize
7.7MB

Download
memory/1096-28-0x0000000075360000-0x0000000075B10000-memory.dmp

Filesize
7.7MB

Download
memory/1796-34-0x0000000006280000-0x000000000629E000-memory.dmp

Filesize
120KB

Download
memory/1796-35-0x0000000006310000-0x000000000635C000-memory.dmp

Filesize
304KB

Download
memory/1796-43-0x0000000075360000-0x0000000075B10000-memory.dmp

Filesize
7.7MB

Download
memory/1796-39-0x00000000067B0000-0x00000000067D2000-memory.dmp

Filesize
136KB

Download
memory/1796-38-0x0000000006760000-0x000000000677A000-memory.dmp

Filesize
104KB

Download
memory/1796-14-0x0000000075360000-0x0000000075B10000-memory.dmp

Filesize
7.7MB

Download
memory/1796-13-0x0000000005470000-0x0000000005A98000-memory.dmp

Filesize
6.2MB

Download
memory/1796-15-0x0000000075360000-0x0000000075B10000-memory.dmp

Filesize
7.7MB

Download
memory/1796-12-0x0000000002960000-0x0000000002996000-memory.dmp

Filesize
216KB

Download
memory/1796-37-0x00000000067E0000-0x0000000006876000-memory.dmp

Filesize
600KB

Download
memory/1796-18-0x00000000052B0000-0x00000000052D2000-memory.dmp

Filesize
136KB

Download
memory/1796-20-0x00000000053C0000-0x0000000005426000-memory.dmp

Filesize
408KB

Download
memory/1796-27-0x0000000005C60000-0x0000000005FB4000-memory.dmp

Filesize
3.3MB

Download
memory/1796-19-0x0000000005350000-0x00000000053B6000-memory.dmp

Filesize
408KB

Download
memory/5012-29-0x0000000075360000-0x0000000075B10000-memory.dmp

Filesize
7.7MB

Download
memory/5012-4-0x0000000006010000-0x000000000601A000-memory.dmp

Filesize
40KB

Download
memory/5012-3-0x0000000006080000-0x0000000006112000-memory.dmp

Filesize
584KB

Download
memory/5012-5-0x0000000006350000-0x00000000063C6000-memory.dmp

Filesize
472KB

Download
memory/5012-0-0x000000007536E000-0x000000007536F000-memory.dmp

Filesize
4KB

Download
memory/5012-7-0x000000007536E000-0x000000007536F000-memory.dmp

Filesize
4KB

Download
memory/5012-2-0x0000000006630000-0x0000000006BD4000-memory.dmp

Filesize
5.6MB

Download
memory/5012-6-0x0000000075360000-0x0000000075B10000-memory.dmp

Filesize
7.7MB

Download
memory/5012-10-0x00000000062D0000-0x00000000062EE000-memory.dmp

Filesize
120KB

Download
memory/5012-9-0x0000000009E40000-0x000000000A84A000-memory.dmp

Filesize
10.0MB

Download
memory/5012-8-0x0000000075360000-0x0000000075B10000-memory.dmp

Filesize
7.7MB

Download
memory/5012-1-0x0000000000C10000-0x000000000161C000-memory.dmp

Filesize
10.0MB

Download