quasar | 0d6a9673eb3db83be393b8e85fceb372b5fbad79ce1c56bd92ea4b6b3166f657

Analysis

max time kernel
95s
max time network
143s
platform
windows10-2004_x64
resource
win10v2004-20250129-en
resource tags

arch:x64arch:x86image:win10v2004-20250129-enlocale:en-usos:windows10-2004-x64system
submitted
30-01-2025 13:44

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

Especificacin_img-06645478721.pdf76KB.exe
Size

3.7MB
MD5

c7e6c951ca20c04d0d11b0a7d429f6d4
SHA1

e8ec50949c6f6a4e8727a5091f3307381be82839
SHA256

0d6a9673eb3db83be393b8e85fceb372b5fbad79ce1c56bd92ea4b6b3166f657
SHA512

da37fb5599f0a7f405871aff2899c8ece589ff64df1081b2aa3bb563b7f505e4da25ab892094edf7c856fed34f77e0fcec9f5c285af0713d2c57e3d843a0fe67
SSDEEP

98304:01bQRm7L4+pqEYlPqQ5QvWvrfZt7qA7XZ7eFq8u:0mRm7LjpqzkUQvWvrr7qmeRu

Score

10^/10

quasar es code discovery spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

ES CODE

twart.myfirewall.org:9792

rency.ydns.eu:5287

wqo9.firewall-gateway.de:8841

code1.ydns.eu:5287

wqo9.firewall-gateway.de:9792

Mutex

025351e291-5d1041-4fa37-932c7-8L69aeiQec514992

Attributes

encryption_key
3145298725BA5E0DD56E87FFE3F8898EA81E6EDA
install_name
Excelworkbook.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 1 IoCs

resource	yara_rule
behavioral2/memory/232-11-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar

Executes dropped EXE 5 IoCs

pid	Process
1000	Excelworkbook.exe
3392	Excelworkbook.exe
3264	Excelworkbook.exe
1572	Excelworkbook.exe
4784	Excelworkbook.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2744 set thread context of 232	2744	Especificacin_img-06645478721.pdf76KB.exe	85
PID 1000 set thread context of 4784	1000	Excelworkbook.exe	95

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	Especificacin_img-06645478721.pdf76KB.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Especificacin_img-06645478721.pdf76KB.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Excelworkbook.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Excelworkbook.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
1396	schtasks.exe
640	schtasks.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
1000	Excelworkbook.exe
1000	Excelworkbook.exe
1000	Excelworkbook.exe
1000	Excelworkbook.exe
1000	Excelworkbook.exe
1000	Excelworkbook.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	232	Especificacin_img-06645478721.pdf76KB.exe
Token: SeDebugPrivilege	1000	Excelworkbook.exe
Token: SeDebugPrivilege	4784	Excelworkbook.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4784	Excelworkbook.exe

Suspicious use of WriteProcessMemory 34 IoCs

description	pid	Process	procid_target
PID 2744 wrote to memory of 232	2744	Especificacin_img-06645478721.pdf76KB.exe	85
PID 2744 wrote to memory of 232	2744	Especificacin_img-06645478721.pdf76KB.exe	85
PID 2744 wrote to memory of 232	2744	Especificacin_img-06645478721.pdf76KB.exe	85
PID 2744 wrote to memory of 232	2744	Especificacin_img-06645478721.pdf76KB.exe	85
PID 2744 wrote to memory of 232	2744	Especificacin_img-06645478721.pdf76KB.exe	85
PID 2744 wrote to memory of 232	2744	Especificacin_img-06645478721.pdf76KB.exe	85
PID 2744 wrote to memory of 232	2744	Especificacin_img-06645478721.pdf76KB.exe	85
PID 2744 wrote to memory of 232	2744	Especificacin_img-06645478721.pdf76KB.exe	85
PID 232 wrote to memory of 1396	232	Especificacin_img-06645478721.pdf76KB.exe	86
PID 232 wrote to memory of 1396	232	Especificacin_img-06645478721.pdf76KB.exe	86
PID 232 wrote to memory of 1396	232	Especificacin_img-06645478721.pdf76KB.exe	86
PID 232 wrote to memory of 1000	232	Especificacin_img-06645478721.pdf76KB.exe	88
PID 232 wrote to memory of 1000	232	Especificacin_img-06645478721.pdf76KB.exe	88
PID 232 wrote to memory of 1000	232	Especificacin_img-06645478721.pdf76KB.exe	88
PID 1000 wrote to memory of 3392	1000	Excelworkbook.exe	92
PID 1000 wrote to memory of 3392	1000	Excelworkbook.exe	92
PID 1000 wrote to memory of 3392	1000	Excelworkbook.exe	92
PID 1000 wrote to memory of 3264	1000	Excelworkbook.exe	93
PID 1000 wrote to memory of 3264	1000	Excelworkbook.exe	93
PID 1000 wrote to memory of 3264	1000	Excelworkbook.exe	93
PID 1000 wrote to memory of 1572	1000	Excelworkbook.exe	94
PID 1000 wrote to memory of 1572	1000	Excelworkbook.exe	94
PID 1000 wrote to memory of 1572	1000	Excelworkbook.exe	94
PID 1000 wrote to memory of 4784	1000	Excelworkbook.exe	95
PID 1000 wrote to memory of 4784	1000	Excelworkbook.exe	95
PID 1000 wrote to memory of 4784	1000	Excelworkbook.exe	95
PID 1000 wrote to memory of 4784	1000	Excelworkbook.exe	95
PID 1000 wrote to memory of 4784	1000	Excelworkbook.exe	95
PID 1000 wrote to memory of 4784	1000	Excelworkbook.exe	95
PID 1000 wrote to memory of 4784	1000	Excelworkbook.exe	95
PID 1000 wrote to memory of 4784	1000	Excelworkbook.exe	95
PID 4784 wrote to memory of 640	4784	Excelworkbook.exe	96
PID 4784 wrote to memory of 640	4784	Excelworkbook.exe	96
PID 4784 wrote to memory of 640	4784	Excelworkbook.exe	96

C:\Users\Admin\AppData\Local\Temp\Especificacin_img-06645478721.pdf76KB.exe
"C:\Users\Admin\AppData\Local\Temp\Especificacin_img-06645478721.pdf76KB.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2744
- C:\Users\Admin\AppData\Local\Temp\Especificacin_img-06645478721.pdf76KB.exe
  "C:\Users\Admin\AppData\Local\Temp\Especificacin_img-06645478721.pdf76KB.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:232
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks" /create /tn "pdfdocument" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Excelworkbook.exe" /rl HIGHEST /f
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:1396
- - C:\Users\Admin\AppData\Roaming\SubDir\Excelworkbook.exe
    "C:\Users\Admin\AppData\Roaming\SubDir\Excelworkbook.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:1000
  - - C:\Users\Admin\AppData\Roaming\SubDir\Excelworkbook.exe
      "C:\Users\Admin\AppData\Roaming\SubDir\Excelworkbook.exe"
      4⤵
      Executes dropped EXE
      PID:3392
  - - C:\Users\Admin\AppData\Roaming\SubDir\Excelworkbook.exe
      "C:\Users\Admin\AppData\Roaming\SubDir\Excelworkbook.exe"
      4⤵
      Executes dropped EXE
      PID:3264
  - - C:\Users\Admin\AppData\Roaming\SubDir\Excelworkbook.exe
      "C:\Users\Admin\AppData\Roaming\SubDir\Excelworkbook.exe"
      4⤵
      Executes dropped EXE
      PID:1572
  - - C:\Users\Admin\AppData\Roaming\SubDir\Excelworkbook.exe
      "C:\Users\Admin\AppData\Roaming\SubDir\Excelworkbook.exe"
      4⤵
      Executes dropped EXE
      System Location Discovery: System Language Discovery
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of SetWindowsHookEx
      Suspicious use of WriteProcessMemory
      PID:4784
    - - C:\Windows\SysWOW64\schtasks.exe
        
        "schtasks" /create /tn "pdfdocument" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Excelworkbook.exe" /rl HIGHEST /f
        5⤵
        System Location Discovery: System Language Discovery
        Scheduled Task/Job: Scheduled Task
        
        PID:640

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

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\Especificacin_img-06645478721.pdf76KB.exe.log

Filesize
1KB

MD5
8ec831f3e3a3f77e4a7b9cd32b48384c

SHA1
d83f09fd87c5bd86e045873c231c14836e76a05c

SHA256
7667e538030e3f8ce2886e47a01af24cb0ea70528b1e821c5d8832c5076cb982

SHA512
26bffa2406b66368bd412bf25869a792631455645992cdcade2dbc13a2e56fb546414a6a9223b94c96c38d89187add6678d4779a88b38b0c9e36be8527b213c3

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

Filesize
3.7MB

MD5
c7e6c951ca20c04d0d11b0a7d429f6d4

SHA1
e8ec50949c6f6a4e8727a5091f3307381be82839

SHA256
0d6a9673eb3db83be393b8e85fceb372b5fbad79ce1c56bd92ea4b6b3166f657

SHA512
da37fb5599f0a7f405871aff2899c8ece589ff64df1081b2aa3bb563b7f505e4da25ab892094edf7c856fed34f77e0fcec9f5c285af0713d2c57e3d843a0fe67

Download Submit
memory/232-11-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/232-22-0x00000000747A0000-0x0000000074F50000-memory.dmp

Filesize
7.7MB

Download
memory/232-15-0x00000000747A0000-0x0000000074F50000-memory.dmp

Filesize
7.7MB

Download
memory/232-13-0x00000000747A0000-0x0000000074F50000-memory.dmp

Filesize
7.7MB

Download
memory/1000-32-0x00000000747A0000-0x0000000074F50000-memory.dmp

Filesize
7.7MB

Download
memory/1000-23-0x00000000747A0000-0x0000000074F50000-memory.dmp

Filesize
7.7MB

Download
memory/1000-25-0x00000000747A0000-0x0000000074F50000-memory.dmp

Filesize
7.7MB

Download
memory/1000-24-0x00000000747A0000-0x0000000074F50000-memory.dmp

Filesize
7.7MB

Download
memory/2744-4-0x0000000005480000-0x000000000548A000-memory.dmp

Filesize
40KB

Download
memory/2744-9-0x000000000B460000-0x000000000B7C8000-memory.dmp

Filesize
3.4MB

Download
memory/2744-7-0x00000000747AE000-0x00000000747AF000-memory.dmp

Filesize
4KB

Download
memory/2744-14-0x00000000747A0000-0x0000000074F50000-memory.dmp

Filesize
7.7MB

Download
memory/2744-5-0x00000000747A0000-0x0000000074F50000-memory.dmp

Filesize
7.7MB

Download
memory/2744-3-0x0000000005520000-0x00000000055B2000-memory.dmp

Filesize
584KB

Download
memory/2744-2-0x0000000005A30000-0x0000000005FD4000-memory.dmp

Filesize
5.6MB

Download
memory/2744-10-0x000000000E870000-0x000000000E90C000-memory.dmp

Filesize
624KB

Download
memory/2744-1-0x00000000006D0000-0x0000000000A88000-memory.dmp

Filesize
3.7MB

Download
memory/2744-6-0x0000000005770000-0x000000000578E000-memory.dmp

Filesize
120KB

Download
memory/2744-8-0x00000000747A0000-0x0000000074F50000-memory.dmp

Filesize
7.7MB

Download
memory/2744-0-0x00000000747AE000-0x00000000747AF000-memory.dmp

Filesize
4KB

Download
memory/4784-33-0x0000000007020000-0x0000000007638000-memory.dmp

Filesize
6.1MB

Download
memory/4784-34-0x0000000006B10000-0x0000000006B60000-memory.dmp

Filesize
320KB

Download
memory/4784-35-0x0000000006D80000-0x0000000006E32000-memory.dmp

Filesize
712KB

Download
memory/4784-36-0x0000000007000000-0x0000000007012000-memory.dmp

Filesize
72KB

Download
memory/4784-37-0x0000000008000000-0x000000000803C000-memory.dmp

Filesize
240KB

Download
memory/4784-38-0x00000000080B0000-0x0000000008116000-memory.dmp

Filesize
408KB

Download