quasar | e4bdfc5dee2559aba73e88fa3c0185821d328a1ead618e578352623687fa9ae7

Analysis

max time kernel
129s
max time network
140s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
07-12-2024 22:49

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General

Target

Dox Tool V3 Cracked/data/doxsys.exe
Size

1.0MB
MD5

8f36caf603f3f2b192c5fd06a8e3c699
SHA1

44f387152ee1fb02a83ed0be5e942fd4a733e235
SHA256

0ca828c630091173cafd2663393888849459fbc9581d1fd062567d0afdf79a38
SHA512

9df012c7420a4f6224907a8ac1e3293985b30c9ff829ecc9cdeea56fdcaa1c46d8e131fdd9b525e6af092065a29401c11f24390ba30969e9f3ab7e60e094dcba
SSDEEP

12288:GNTWV+v54B9H+hyf2SF6L6D5hKMzPg9e0oEPABi:GWVa4bHwkSYa4gk0omA

Score

10^/10

quasar office04 discovery persistence spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.3.0.0

Botnet

Office04

192.168.1.11:4782

Mutex

QSR_MUTEX_f39lWqYnYtP5YngtM5

Attributes

encryption_key
c5q7P5jsfrwN6nB5c3mG
install_name
SystemUpdate.exe
log_directory
Logs
reconnect_delay
3000
startup_key
WindowsUpdate
subdirectory
SubDir

Signatures

Quasar RAT 3 IoCs

Quasar is an open source Remote Access Tool.

trojan spyware quasar

description	flow	ioc	Process
Key opened		\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	doxsys.exe
	4	ip-api.com	Process not Found
	13	icanhazip.com	Process not Found

Quasar family
quasar

Quasar payload 3 IoCs

resource	yara_rule
behavioral17/files/0x0006000000016de8-22.dat	family_quasar
behavioral17/memory/2556-37-0x00000000013D0000-0x000000000142E000-memory.dmp	family_quasar
behavioral17/memory/712-47-0x0000000000FA0000-0x0000000000FFE000-memory.dmp	family_quasar

Executes dropped EXE 8 IoCs

pid	Process
2728	svchost.exe
2788	Dox Tool V3 Cracked.exe
2556	WindowsUpdate.exe
2784	DOX.exe
712	SystemUpdate.exe
2724	HQUHlwGxWA.exe
2512	svchost.exe
444	HQUHlwGxWA.exe

Loads dropped DLL 7 IoCs

pid	Process
3004	doxsys.exe
3004	doxsys.exe
3004	doxsys.exe
2788	Dox Tool V3 Cracked.exe
2788	Dox Tool V3 Cracked.exe
2788	Dox Tool V3 Cracked.exe
2556	WindowsUpdate.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1488793075-819845221-1497111674-1000\Software\Microsoft\Windows\CurrentVersion\Run\Windows 10 Update = "C:\\Users\\Admin\\AppData\\Roaming\\svchost.exe"	svchost.exe

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Looks up external IP address via web service 2 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
4	ip-api.com
13	icanhazip.com

Drops file in System32 directory 4 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\SubDir\SystemUpdate.exe	WindowsUpdate.exe
File opened for modification	C:\Windows\SysWOW64\SubDir\SystemUpdate.exe	WindowsUpdate.exe
File opened for modification	C:\Windows\SysWOW64\SubDir\SystemUpdate.exe	SystemUpdate.exe
File opened for modification	C:\Windows\SysWOW64\SubDir	SystemUpdate.exe

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 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	doxsys.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Dox Tool V3 Cracked.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	DOX.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WindowsUpdate.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	SystemUpdate.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
2520	schtasks.exe
1240	schtasks.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	2728	svchost.exe
Token: SeDebugPrivilege	2556	WindowsUpdate.exe
Token: SeDebugPrivilege	712	SystemUpdate.exe
Token: SeDebugPrivilege	2784	DOX.exe
Token: SeDebugPrivilege	2512	svchost.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
712	SystemUpdate.exe
2512	svchost.exe

Suspicious use of WriteProcessMemory 43 IoCs

description	pid	Process	procid_target
PID 3004 wrote to memory of 2728	3004	doxsys.exe	31
PID 3004 wrote to memory of 2728	3004	doxsys.exe	31
PID 3004 wrote to memory of 2728	3004	doxsys.exe	31
PID 3004 wrote to memory of 2728	3004	doxsys.exe	31
PID 3004 wrote to memory of 2788	3004	doxsys.exe	32
PID 3004 wrote to memory of 2788	3004	doxsys.exe	32
PID 3004 wrote to memory of 2788	3004	doxsys.exe	32
PID 3004 wrote to memory of 2788	3004	doxsys.exe	32
PID 2788 wrote to memory of 2556	2788	Dox Tool V3 Cracked.exe	33
PID 2788 wrote to memory of 2556	2788	Dox Tool V3 Cracked.exe	33
PID 2788 wrote to memory of 2556	2788	Dox Tool V3 Cracked.exe	33
PID 2788 wrote to memory of 2556	2788	Dox Tool V3 Cracked.exe	33
PID 2788 wrote to memory of 2556	2788	Dox Tool V3 Cracked.exe	33
PID 2788 wrote to memory of 2556	2788	Dox Tool V3 Cracked.exe	33
PID 2788 wrote to memory of 2556	2788	Dox Tool V3 Cracked.exe	33
PID 2788 wrote to memory of 2784	2788	Dox Tool V3 Cracked.exe	34
PID 2788 wrote to memory of 2784	2788	Dox Tool V3 Cracked.exe	34
PID 2788 wrote to memory of 2784	2788	Dox Tool V3 Cracked.exe	34
PID 2788 wrote to memory of 2784	2788	Dox Tool V3 Cracked.exe	34
PID 2556 wrote to memory of 2520	2556	WindowsUpdate.exe	36
PID 2556 wrote to memory of 2520	2556	WindowsUpdate.exe	36
PID 2556 wrote to memory of 2520	2556	WindowsUpdate.exe	36
PID 2556 wrote to memory of 2520	2556	WindowsUpdate.exe	36
PID 2556 wrote to memory of 712	2556	WindowsUpdate.exe	38
PID 2556 wrote to memory of 712	2556	WindowsUpdate.exe	38
PID 2556 wrote to memory of 712	2556	WindowsUpdate.exe	38
PID 2556 wrote to memory of 712	2556	WindowsUpdate.exe	38
PID 2556 wrote to memory of 712	2556	WindowsUpdate.exe	38
PID 2556 wrote to memory of 712	2556	WindowsUpdate.exe	38
PID 2556 wrote to memory of 712	2556	WindowsUpdate.exe	38
PID 712 wrote to memory of 1240	712	SystemUpdate.exe	39
PID 712 wrote to memory of 1240	712	SystemUpdate.exe	39
PID 712 wrote to memory of 1240	712	SystemUpdate.exe	39
PID 712 wrote to memory of 1240	712	SystemUpdate.exe	39
PID 2728 wrote to memory of 2724	2728	svchost.exe	41
PID 2728 wrote to memory of 2724	2728	svchost.exe	41
PID 2728 wrote to memory of 2724	2728	svchost.exe	41
PID 2728 wrote to memory of 2512	2728	svchost.exe	42
PID 2728 wrote to memory of 2512	2728	svchost.exe	42
PID 2728 wrote to memory of 2512	2728	svchost.exe	42
PID 2512 wrote to memory of 444	2512	svchost.exe	43
PID 2512 wrote to memory of 444	2512	svchost.exe	43
PID 2512 wrote to memory of 444	2512	svchost.exe	43

C:\Users\Admin\AppData\Local\Temp\Dox Tool V3 Cracked\data\doxsys.exe
"C:\Users\Admin\AppData\Local\Temp\Dox Tool V3 Cracked\data\doxsys.exe"
1⤵
- Quasar RAT
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3004
- C:\Users\Admin\AppData\Local\Temp\svchost.exe
  "C:\Users\Admin\AppData\Local\Temp\svchost.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2728
- - C:\Users\Admin\AppData\Local\Temp\HQUHlwGxWA.exe
    "C:\Users\Admin\AppData\Local\Temp\HQUHlwGxWA.exe"
    3⤵
    - Executes dropped EXE
    PID:2724
- - C:\Users\Admin\AppData\Roaming\svchost.exe
    "C:\Users\Admin\AppData\Roaming\svchost.exe" C:\Users\Admin\AppData\Local\Temp\svchost.exe
    3⤵
    - Executes dropped EXE
    - Adds Run key to start application
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:2512
  - - C:\Users\Admin\AppData\Local\Temp\HQUHlwGxWA.exe
      "C:\Users\Admin\AppData\Local\Temp\HQUHlwGxWA.exe"
      4⤵
      Executes dropped EXE
      PID:444
- C:\Users\Admin\AppData\Local\Temp\Dox Tool V3 Cracked.exe
  "C:\Users\Admin\AppData\Local\Temp\Dox Tool V3 Cracked.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2788
- - C:\Users\Admin\AppData\Local\Temp\WindowsUpdate.exe
    "C:\Users\Admin\AppData\Local\Temp\WindowsUpdate.exe"
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Drops file in System32 directory
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:2556
  - - C:\Windows\SysWOW64\schtasks.exe
      "schtasks" /create /tn "WindowsUpdate" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\WindowsUpdate.exe" /rl HIGHEST /f
      4⤵
      System Location Discovery: System Language Discovery
      Scheduled Task/Job: Scheduled Task
      PID:2520
  - - C:\Windows\SysWOW64\SubDir\SystemUpdate.exe
      "C:\Windows\SysWOW64\SubDir\SystemUpdate.exe"
      4⤵
      Executes dropped EXE
      Drops file in System32 directory
      System Location Discovery: System Language Discovery
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of SetWindowsHookEx
      Suspicious use of WriteProcessMemory
      PID:712
    - - C:\Windows\SysWOW64\schtasks.exe
        
        "schtasks" /create /tn "WindowsUpdate" /sc ONLOGON /tr "C:\Windows\SysWOW64\SubDir\SystemUpdate.exe" /rl HIGHEST /f
        5⤵
        System Location Discovery: System Language Discovery
        Scheduled Task/Job: Scheduled Task
        
        PID:1240
- - C:\Users\Admin\AppData\Local\Temp\DOX.exe
    "C:\Users\Admin\AppData\Local\Temp\DOX.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:2784

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\DOX.exe

Filesize
154KB

MD5
670f75850165e3c3ef0df41e1565ff58

SHA1
784ae13c951ac390d7dea0071c97aded6800b708

SHA256
fb128eba50fac8bc22faac39de602c306809cb37167b950bd194eb0bd9832812

SHA512
c0355235fbce7829dbcd3fac26ec5663b09c880826a014599127f330ddd3c16a95a0ab973fa75ddbb4ce0f8756ab2494739b04d1fda0bb799d577e493c9ca9b9

Download Submit
C:\Users\Admin\AppData\Local\Temp\HQUHlwGxWA.exe

Filesize
20KB

MD5
0d282d4eb8db6d5152b4e5fd3e2064b5

SHA1
72cec747647d5d0f6ef2e5ddb34f1db68fc183e5

SHA256
8663bef0304a937fe47af465c03b8930a5db2dad39bf4dd1cc6baa64cc272061

SHA512
16b2551711afa27baf9aa95d37c2d1b0689c32930ca5a4c7fabe66ea05513f460c58b36fdb96efb26963f10cdc518934dd3f5b623d424a2f299cc47d150f1e72

Download Submit
C:\Users\Admin\AppData\Local\Temp\WebCam_Capture.dll

Filesize
20KB

MD5
94306f6cf69f7e7c0b4f10ea499f73dd

SHA1
3228b4c2ca9109aa86f2810afc3d528947501c92

SHA256
ed937977d846c19ea5a721c8f720dafc4c697c2b136c17d66d7b6a4200090a7e

SHA512
d6c19775a96dedbd40be96d5b3aa3fb0db3d52749e0d54667b38a2f677c94b630ab543457708a1c123776ec473e9f40f18eb4080703ee9adf08110c417dea136

Download Submit
\Users\Admin\AppData\Local\Temp\Dox Tool V3 Cracked.exe

Filesize
688KB

MD5
19d55f26a6237985cb72c59c08d4828f

SHA1
8bc51ad39e35f9be7d46e9e90e754e07d9c88b80

SHA256
317f9d304aea7c5a4b3516f5379a63e2a4fec91578f3c3f69507c8167798062e

SHA512
7a9de012783f9323264fb59739b76195acedd846ea15382d67e5ab19325269a37647865aaa44da9a97fb8eacdf365c1b6c55c0920c46a6cdca6a7c73b09e19d1

Download Submit
\Users\Admin\AppData\Local\Temp\WindowsUpdate.exe

Filesize
348KB

MD5
a59f7fb8ac2dc166432a86eb8e2179ff

SHA1
9c8b24bda935e397e1c0cb33752331fe1f773b45

SHA256
82d315a2102a1bbd8c1533ea70f93982d2ad0fbbad3d48e9a4265c45353ceacc

SHA512
ff05149ca95d982ee44c820d8bc03e48d6230a7085291f0653398a410a16610038fbc336ec843db7020458fbe982762439990b348de050248758450b3ea263be

Download Submit
\Users\Admin\AppData\Local\Temp\svchost.exe

Filesize
76KB

MD5
a57d275fcac1be0b9aad189223a313df

SHA1
0762b222741fa30751dce16e7dae2bcd191adaea

SHA256
1c6d4e2a60849385c9b4cfbb1fc92032cb503497099208f62d7908e52b9b487b

SHA512
41d90ec2548654b86bba21d178bae55b538bc7acf7811b9615095e4719e52075096053427ff85428a51047f405e8d1e6a633b999655e296c9ac396fb2bba36a8

Download Submit
memory/444-69-0x0000000000540000-0x0000000000548000-memory.dmp

Filesize
32KB

Download
memory/712-47-0x0000000000FA0000-0x0000000000FFE000-memory.dmp

Filesize
376KB

Download
memory/2556-37-0x00000000013D0000-0x000000000142E000-memory.dmp

Filesize
376KB

Download
memory/2724-58-0x0000000000340000-0x0000000000348000-memory.dmp

Filesize
32KB

Download
memory/2728-39-0x0000000000020000-0x000000000003A000-memory.dmp

Filesize
104KB

Download
memory/2784-38-0x0000000001220000-0x000000000124C000-memory.dmp

Filesize
176KB

Download
memory/3004-0-0x0000000074A21000-0x0000000074A22000-memory.dmp

Filesize
4KB

Download
memory/3004-19-0x0000000074A20000-0x0000000074FCB000-memory.dmp

Filesize
5.7MB

Download
memory/3004-4-0x0000000074A20000-0x0000000074FCB000-memory.dmp

Filesize
5.7MB

Download
memory/3004-2-0x0000000074A20000-0x0000000074FCB000-memory.dmp

Filesize
5.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads