quasar | 6af042955207ac4aa13b739d44ab6292af8892ac013444326d15ead0fefdfabe

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20250129-en
resource tags

arch:x64arch:x86image:win10v2004-20250129-enlocale:en-usos:windows10-2004-x64system
submitted
05-02-2025 03:49

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General

Target

6af042955207ac4aa13b739d44ab6292af8892ac013444326d15ead0fefdfabe.exe
Size

3.7MB
MD5

7c5ba84841c124268a70f0a668d851cb
SHA1

b427e9c43f0a1a361f7bf38d5ea829e09a986f54
SHA256

6af042955207ac4aa13b739d44ab6292af8892ac013444326d15ead0fefdfabe
SHA512

523a026f20a80a120e107fbe32bcf8f8434910f9d20ae12c0cf4469b5a61fe120553f952c1724451ec40d3d043a874b57612278d9ed5834f9e85b4aaf928e64a
SSDEEP

98304:2XxBLBJqj8ysrESFeA4xEa375aqJeZhd9ijkMCIhNVT+lLb:2X7LjgFs5FUEfX3gqANG

Score

10^/10

quasar sim discovery spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

SIM

yuba.ydns.eu:6921

Mutex

c1407Qq42e-4199-420b-b7e3-f2181EdZ44b38970

Attributes

encryption_key
9AE9A56EA56429B2803AB077CB5D2AE3FDEA1BD6
install_name
Edge.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Microsoft Edge
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/5004-11-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar

Executes dropped EXE 3 IoCs

pid	Process
4376	Edge.exe
1484	Edge.exe
4144	Edge.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 760 set thread context of 5004	760	6af042955207ac4aa13b739d44ab6292af8892ac013444326d15ead0fefdfabe.exe	89
PID 4376 set thread context of 4144	4376	Edge.exe	96

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	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	6af042955207ac4aa13b739d44ab6292af8892ac013444326d15ead0fefdfabe.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	6af042955207ac4aa13b739d44ab6292af8892ac013444326d15ead0fefdfabe.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Edge.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Edge.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
1992	schtasks.exe
4032	schtasks.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4376	Edge.exe
4376	Edge.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	5004	6af042955207ac4aa13b739d44ab6292af8892ac013444326d15ead0fefdfabe.exe
Token: SeDebugPrivilege	4376	Edge.exe
Token: SeDebugPrivilege	4144	Edge.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4144	Edge.exe

Suspicious use of WriteProcessMemory 28 IoCs

description	pid	Process	procid_target
PID 760 wrote to memory of 5004	760	6af042955207ac4aa13b739d44ab6292af8892ac013444326d15ead0fefdfabe.exe	89
PID 760 wrote to memory of 5004	760	6af042955207ac4aa13b739d44ab6292af8892ac013444326d15ead0fefdfabe.exe	89
PID 760 wrote to memory of 5004	760	6af042955207ac4aa13b739d44ab6292af8892ac013444326d15ead0fefdfabe.exe	89
PID 760 wrote to memory of 5004	760	6af042955207ac4aa13b739d44ab6292af8892ac013444326d15ead0fefdfabe.exe	89
PID 760 wrote to memory of 5004	760	6af042955207ac4aa13b739d44ab6292af8892ac013444326d15ead0fefdfabe.exe	89
PID 760 wrote to memory of 5004	760	6af042955207ac4aa13b739d44ab6292af8892ac013444326d15ead0fefdfabe.exe	89
PID 760 wrote to memory of 5004	760	6af042955207ac4aa13b739d44ab6292af8892ac013444326d15ead0fefdfabe.exe	89
PID 760 wrote to memory of 5004	760	6af042955207ac4aa13b739d44ab6292af8892ac013444326d15ead0fefdfabe.exe	89
PID 5004 wrote to memory of 1992	5004	6af042955207ac4aa13b739d44ab6292af8892ac013444326d15ead0fefdfabe.exe	90
PID 5004 wrote to memory of 1992	5004	6af042955207ac4aa13b739d44ab6292af8892ac013444326d15ead0fefdfabe.exe	90
PID 5004 wrote to memory of 1992	5004	6af042955207ac4aa13b739d44ab6292af8892ac013444326d15ead0fefdfabe.exe	90
PID 5004 wrote to memory of 4376	5004	6af042955207ac4aa13b739d44ab6292af8892ac013444326d15ead0fefdfabe.exe	92
PID 5004 wrote to memory of 4376	5004	6af042955207ac4aa13b739d44ab6292af8892ac013444326d15ead0fefdfabe.exe	92
PID 5004 wrote to memory of 4376	5004	6af042955207ac4aa13b739d44ab6292af8892ac013444326d15ead0fefdfabe.exe	92
PID 4376 wrote to memory of 1484	4376	Edge.exe	95
PID 4376 wrote to memory of 1484	4376	Edge.exe	95
PID 4376 wrote to memory of 1484	4376	Edge.exe	95
PID 4376 wrote to memory of 4144	4376	Edge.exe	96
PID 4376 wrote to memory of 4144	4376	Edge.exe	96
PID 4376 wrote to memory of 4144	4376	Edge.exe	96
PID 4376 wrote to memory of 4144	4376	Edge.exe	96
PID 4376 wrote to memory of 4144	4376	Edge.exe	96
PID 4376 wrote to memory of 4144	4376	Edge.exe	96
PID 4376 wrote to memory of 4144	4376	Edge.exe	96
PID 4376 wrote to memory of 4144	4376	Edge.exe	96
PID 4144 wrote to memory of 4032	4144	Edge.exe	97
PID 4144 wrote to memory of 4032	4144	Edge.exe	97
PID 4144 wrote to memory of 4032	4144	Edge.exe	97

C:\Users\Admin\AppData\Local\Temp\6af042955207ac4aa13b739d44ab6292af8892ac013444326d15ead0fefdfabe.exe
"C:\Users\Admin\AppData\Local\Temp\6af042955207ac4aa13b739d44ab6292af8892ac013444326d15ead0fefdfabe.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:760
- C:\Users\Admin\AppData\Local\Temp\6af042955207ac4aa13b739d44ab6292af8892ac013444326d15ead0fefdfabe.exe
  "C:\Users\Admin\AppData\Local\Temp\6af042955207ac4aa13b739d44ab6292af8892ac013444326d15ead0fefdfabe.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:5004
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks" /create /tn "Microsoft Edge" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Edge.exe" /rl HIGHEST /f
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:1992
- - C:\Users\Admin\AppData\Roaming\SubDir\Edge.exe
    "C:\Users\Admin\AppData\Roaming\SubDir\Edge.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:4376
  - - C:\Users\Admin\AppData\Roaming\SubDir\Edge.exe
      "C:\Users\Admin\AppData\Roaming\SubDir\Edge.exe"
      4⤵
      Executes dropped EXE
      PID:1484
  - - C:\Users\Admin\AppData\Roaming\SubDir\Edge.exe
      "C:\Users\Admin\AppData\Roaming\SubDir\Edge.exe"
      4⤵
      Executes dropped EXE
      System Location Discovery: System Language Discovery
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of SetWindowsHookEx
      Suspicious use of WriteProcessMemory
      PID:4144
    - - C:\Windows\SysWOW64\schtasks.exe
        
        "schtasks" /create /tn "Microsoft Edge" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Edge.exe" /rl HIGHEST /f
        5⤵
        System Location Discovery: System Language Discovery
        Scheduled Task/Job: Scheduled Task
        
        PID:4032

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\Local\Microsoft\CLR_v4.0_32\UsageLogs\6af042955207ac4aa13b739d44ab6292af8892ac013444326d15ead0fefdfabe.exe.log

Filesize
1KB

MD5
8ec831f3e3a3f77e4a7b9cd32b48384c

SHA1
d83f09fd87c5bd86e045873c231c14836e76a05c

SHA256
7667e538030e3f8ce2886e47a01af24cb0ea70528b1e821c5d8832c5076cb982

SHA512
26bffa2406b66368bd412bf25869a792631455645992cdcade2dbc13a2e56fb546414a6a9223b94c96c38d89187add6678d4779a88b38b0c9e36be8527b213c3

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

Filesize
3.7MB

MD5
7c5ba84841c124268a70f0a668d851cb

SHA1
b427e9c43f0a1a361f7bf38d5ea829e09a986f54

SHA256
6af042955207ac4aa13b739d44ab6292af8892ac013444326d15ead0fefdfabe

SHA512
523a026f20a80a120e107fbe32bcf8f8434910f9d20ae12c0cf4469b5a61fe120553f952c1724451ec40d3d043a874b57612278d9ed5834f9e85b4aaf928e64a

Download Submit
memory/760-5-0x0000000074FF0000-0x00000000757A0000-memory.dmp

Filesize
7.7MB

Download
memory/760-2-0x0000000005DA0000-0x0000000006344000-memory.dmp

Filesize
5.6MB

Download
memory/760-4-0x0000000005900000-0x000000000590A000-memory.dmp

Filesize
40KB

Download
memory/760-0-0x0000000074FFE000-0x0000000074FFF000-memory.dmp

Filesize
4KB

Download
memory/760-6-0x0000000006970000-0x000000000698E000-memory.dmp

Filesize
120KB

Download
memory/760-7-0x0000000074FFE000-0x0000000074FFF000-memory.dmp

Filesize
4KB

Download
memory/760-8-0x0000000074FF0000-0x00000000757A0000-memory.dmp

Filesize
7.7MB

Download
memory/760-9-0x00000000093B0000-0x0000000009718000-memory.dmp

Filesize
3.4MB

Download
memory/760-10-0x00000000097C0000-0x000000000985C000-memory.dmp

Filesize
624KB

Download
memory/760-1-0x00000000009C0000-0x0000000000D80000-memory.dmp

Filesize
3.8MB

Download
memory/760-3-0x0000000005740000-0x00000000057D2000-memory.dmp

Filesize
584KB

Download
memory/760-14-0x0000000074FF0000-0x00000000757A0000-memory.dmp

Filesize
7.7MB

Download
memory/4144-34-0x0000000006D80000-0x0000000006D92000-memory.dmp

Filesize
72KB

Download
memory/4144-35-0x0000000008020000-0x000000000805C000-memory.dmp

Filesize
240KB

Download
memory/4144-36-0x00000000080D0000-0x0000000008136000-memory.dmp

Filesize
408KB

Download
memory/4144-33-0x0000000006DB0000-0x0000000006E62000-memory.dmp

Filesize
712KB

Download
memory/4144-32-0x0000000006B40000-0x0000000006B90000-memory.dmp

Filesize
320KB

Download
memory/4144-31-0x0000000006FC0000-0x00000000075D8000-memory.dmp

Filesize
6.1MB

Download
memory/4376-30-0x0000000074FF0000-0x00000000757A0000-memory.dmp

Filesize
7.7MB

Download
memory/4376-25-0x0000000074FF0000-0x00000000757A0000-memory.dmp

Filesize
7.7MB

Download
memory/4376-24-0x0000000074FF0000-0x00000000757A0000-memory.dmp

Filesize
7.7MB

Download
memory/4376-23-0x0000000074FF0000-0x00000000757A0000-memory.dmp

Filesize
7.7MB

Download
memory/5004-22-0x0000000074FF0000-0x00000000757A0000-memory.dmp

Filesize
7.7MB

Download
memory/5004-15-0x0000000074FF0000-0x00000000757A0000-memory.dmp

Filesize
7.7MB

Download
memory/5004-13-0x0000000074FF0000-0x00000000757A0000-memory.dmp

Filesize
7.7MB

Download
memory/5004-11-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download