quasar | 71512048060021143b305fa78ef6a52aa65dc621d84d676adc793f65515200a2

Analysis

max time kernel
147s
max time network
148s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
14-01-2025 15:08

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General

Target

pdf_2025 QUOTATION - #202401146778.pdf (83kb).exe
Size

3.6MB
MD5

7ced1e3728202bb14170fdbcde4f69b2
SHA1

bf67ce43accf497ffa74caa94a5c09209b974f07
SHA256

3bee4d2ab33ac3f0605136f09cba556140d62ce9a0c1bdb1639159b43ae58943
SHA512

e71a9b4ec8ab4cb18c990e77ecb2fea86dd28cb769274bc34b31095b8124985edf4a5b3426c4cad59429ccae85726fcb476cf6e4053af0d902c4bb05ca703b3c
SSDEEP

98304:K4QM2Ie6bMOMcv6NVhbK3H055W5XHx85mSQVaT+50WkdEZM:lsILGjbKkfWhHW5mnVapWcg

Score

10^/10

quasar code discovery spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

CODE

twart.myfirewall.org:9792

rency.ydns.eu:5287

wqo9.firewall-gateway.de:8841

code1.ydns.eu:5287

wqo9.firewall-gateway.de:9792

Mutex

025351e291-5d1041-4fa37-932c7-869aeiQec514992

Attributes

encryption_key
3145298725BA5E0DD56E87FFE3F8898EA81E6EDA
install_name
Exccelworkbook.exe
log_directory
Logs
reconnect_delay
6000
startup_key
pdfdocument
subdirectory
SubDir

Signatures

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

Quasar payload 5 IoCs

resource	yara_rule
behavioral1/memory/2260-11-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar
behavioral1/memory/2260-20-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar
behavioral1/memory/2260-17-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar
behavioral1/memory/2260-15-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar
behavioral1/memory/2260-9-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar

Executes dropped EXE 2 IoCs

pid	Process
2892	Exccelworkbook.exe
2464	Exccelworkbook.exe

Loads dropped DLL 1 IoCs

pid	Process
2260	pdf_2025 QUOTATION - #202401146778.pdf (83kb).exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2204 set thread context of 2260	2204	pdf_2025 QUOTATION - #202401146778.pdf (83kb).exe	30
PID 2892 set thread context of 2464	2892	Exccelworkbook.exe	35

System Location Discovery: System Language Discovery 1 TTPs 6 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	pdf_2025 QUOTATION - #202401146778.pdf (83kb).exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	pdf_2025 QUOTATION - #202401146778.pdf (83kb).exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Exccelworkbook.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Exccelworkbook.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.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
2616	schtasks.exe
1736	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2260	pdf_2025 QUOTATION - #202401146778.pdf (83kb).exe
Token: SeDebugPrivilege	2464	Exccelworkbook.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2464	Exccelworkbook.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2204 wrote to memory of 2260	2204	pdf_2025 QUOTATION - #202401146778.pdf (83kb).exe	30
PID 2204 wrote to memory of 2260	2204	pdf_2025 QUOTATION - #202401146778.pdf (83kb).exe	30
PID 2204 wrote to memory of 2260	2204	pdf_2025 QUOTATION - #202401146778.pdf (83kb).exe	30
PID 2204 wrote to memory of 2260	2204	pdf_2025 QUOTATION - #202401146778.pdf (83kb).exe	30
PID 2204 wrote to memory of 2260	2204	pdf_2025 QUOTATION - #202401146778.pdf (83kb).exe	30
PID 2204 wrote to memory of 2260	2204	pdf_2025 QUOTATION - #202401146778.pdf (83kb).exe	30
PID 2204 wrote to memory of 2260	2204	pdf_2025 QUOTATION - #202401146778.pdf (83kb).exe	30
PID 2204 wrote to memory of 2260	2204	pdf_2025 QUOTATION - #202401146778.pdf (83kb).exe	30
PID 2204 wrote to memory of 2260	2204	pdf_2025 QUOTATION - #202401146778.pdf (83kb).exe	30
PID 2260 wrote to memory of 2616	2260	pdf_2025 QUOTATION - #202401146778.pdf (83kb).exe	31
PID 2260 wrote to memory of 2616	2260	pdf_2025 QUOTATION - #202401146778.pdf (83kb).exe	31
PID 2260 wrote to memory of 2616	2260	pdf_2025 QUOTATION - #202401146778.pdf (83kb).exe	31
PID 2260 wrote to memory of 2616	2260	pdf_2025 QUOTATION - #202401146778.pdf (83kb).exe	31
PID 2260 wrote to memory of 2892	2260	pdf_2025 QUOTATION - #202401146778.pdf (83kb).exe	33
PID 2260 wrote to memory of 2892	2260	pdf_2025 QUOTATION - #202401146778.pdf (83kb).exe	33
PID 2260 wrote to memory of 2892	2260	pdf_2025 QUOTATION - #202401146778.pdf (83kb).exe	33
PID 2260 wrote to memory of 2892	2260	pdf_2025 QUOTATION - #202401146778.pdf (83kb).exe	33
PID 2892 wrote to memory of 2464	2892	Exccelworkbook.exe	35
PID 2892 wrote to memory of 2464	2892	Exccelworkbook.exe	35
PID 2892 wrote to memory of 2464	2892	Exccelworkbook.exe	35
PID 2892 wrote to memory of 2464	2892	Exccelworkbook.exe	35
PID 2892 wrote to memory of 2464	2892	Exccelworkbook.exe	35
PID 2892 wrote to memory of 2464	2892	Exccelworkbook.exe	35
PID 2892 wrote to memory of 2464	2892	Exccelworkbook.exe	35
PID 2892 wrote to memory of 2464	2892	Exccelworkbook.exe	35
PID 2892 wrote to memory of 2464	2892	Exccelworkbook.exe	35
PID 2464 wrote to memory of 1736	2464	Exccelworkbook.exe	36
PID 2464 wrote to memory of 1736	2464	Exccelworkbook.exe	36
PID 2464 wrote to memory of 1736	2464	Exccelworkbook.exe	36
PID 2464 wrote to memory of 1736	2464	Exccelworkbook.exe	36

C:\Users\Admin\AppData\Local\Temp\pdf_2025 QUOTATION - #202401146778.pdf (83kb).exe
"C:\Users\Admin\AppData\Local\Temp\pdf_2025 QUOTATION - #202401146778.pdf (83kb).exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2204
- C:\Users\Admin\AppData\Local\Temp\pdf_2025 QUOTATION - #202401146778.pdf (83kb).exe
  "C:\Users\Admin\AppData\Local\Temp\pdf_2025 QUOTATION - #202401146778.pdf (83kb).exe"
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2260
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks" /create /tn "pdfdocument" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Exccelworkbook.exe" /rl HIGHEST /f
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2616
- - C:\Users\Admin\AppData\Roaming\SubDir\Exccelworkbook.exe
    "C:\Users\Admin\AppData\Roaming\SubDir\Exccelworkbook.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2892
  - - C:\Users\Admin\AppData\Roaming\SubDir\Exccelworkbook.exe
      "C:\Users\Admin\AppData\Roaming\SubDir\Exccelworkbook.exe"
      4⤵
      Executes dropped EXE
      System Location Discovery: System Language Discovery
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of SetWindowsHookEx
      Suspicious use of WriteProcessMemory
      PID:2464
    - - C:\Windows\SysWOW64\schtasks.exe
        
        "schtasks" /create /tn "pdfdocument" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Exccelworkbook.exe" /rl HIGHEST /f
        5⤵
        System Location Discovery: System Language Discovery
        Scheduled Task/Job: Scheduled Task
        
        PID:1736

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

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

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Downloads

C:\Users\Admin\AppData\Roaming\SubDir\Exccelworkbook.exe

Filesize
3.6MB

MD5
7ced1e3728202bb14170fdbcde4f69b2

SHA1
bf67ce43accf497ffa74caa94a5c09209b974f07

SHA256
3bee4d2ab33ac3f0605136f09cba556140d62ce9a0c1bdb1639159b43ae58943

SHA512
e71a9b4ec8ab4cb18c990e77ecb2fea86dd28cb769274bc34b31095b8124985edf4a5b3426c4cad59429ccae85726fcb476cf6e4053af0d902c4bb05ca703b3c

Download Submit
memory/2204-21-0x0000000073F90000-0x000000007467E000-memory.dmp

Filesize
6.9MB

Download
memory/2204-3-0x0000000000410000-0x000000000042A000-memory.dmp

Filesize
104KB

Download
memory/2204-1-0x00000000010E0000-0x0000000001482000-memory.dmp

Filesize
3.6MB

Download
memory/2204-0-0x0000000073F9E000-0x0000000073F9F000-memory.dmp

Filesize
4KB

Download
memory/2204-4-0x0000000073F9E000-0x0000000073F9F000-memory.dmp

Filesize
4KB

Download
memory/2204-6-0x00000000085F0000-0x0000000008958000-memory.dmp

Filesize
3.4MB

Download
memory/2204-2-0x0000000073F90000-0x000000007467E000-memory.dmp

Filesize
6.9MB

Download
memory/2204-5-0x0000000073F90000-0x000000007467E000-memory.dmp

Filesize
6.9MB

Download
memory/2260-11-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/2260-17-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/2260-20-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/2260-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2260-9-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/2260-7-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/2260-8-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/2260-22-0x0000000073F90000-0x000000007467E000-memory.dmp

Filesize
6.9MB

Download
memory/2260-23-0x0000000073F90000-0x000000007467E000-memory.dmp

Filesize
6.9MB

Download
memory/2260-15-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/2260-32-0x0000000073F90000-0x000000007467E000-memory.dmp

Filesize
6.9MB

Download
memory/2464-41-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2892-31-0x0000000001020000-0x00000000013C2000-memory.dmp

Filesize
3.6MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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