quasar | dd338ea97fec386923cdfecf3ff4aecac8ac51e494ba8c7e208a1ba51f8f0242

General

Target

NEAS.665e38a9c0c37947cfe9d92290da2380.exe
Size

344KB
MD5

665e38a9c0c37947cfe9d92290da2380
SHA1

98088121719427b7e911c899f639ae007e624368
SHA256

dd338ea97fec386923cdfecf3ff4aecac8ac51e494ba8c7e208a1ba51f8f0242
SHA512

8e476e58f15f53807f7223b8d418177f3c4a6449713dadf9c20ed779c22f5d27ec47263dae698be3a2cfeb65c9db49d120d38301d47c2715ba9a440bb709190d
SSDEEP

6144:fDezYKB9auYv4+B475uBvn1M41NaIFJBdRGLYW3/8ruxIQuGgs8s6Bqyq0Au7pXg:fSzvQv4+BNv1MEaIFJ1WYQ/VIQv8ASlw

Score

10^/10

quasar persistence spyware trojan

Malware Config

Signatures

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

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-177160434-2093019976-369403398-1000\Control Panel\International\Geo\Nation	Client.exe

Executes dropped EXE 3 IoCs

pid	Process
1408	Client.exe
2836	Client.exe
1700	Client.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-1-5-21-177160434-2093019976-369403398-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Windows.Troubleshooter = "\"C:\\Windows\\SysWOW64\\SubDir\\Client.exe\""	Client.exe

Looks up external IP address via web service 1 IoCs

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

flow	ioc
17	ip-api.com

Drops file in System32 directory 4 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\SubDir\Client.exe	NEAS.665e38a9c0c37947cfe9d92290da2380.exe
File opened for modification	C:\Windows\SysWOW64\SubDir\Client.exe	NEAS.665e38a9c0c37947cfe9d92290da2380.exe
File opened for modification	C:\Windows\SysWOW64\SubDir\Client.exe	Client.exe
File opened for modification	C:\Windows\SysWOW64\SubDir	Client.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 3 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task/Job

T1053

pid	Process
3988	schtasks.exe
1848	schtasks.exe
2812	schtasks.exe

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
4856	NEAS.665e38a9c0c37947cfe9d92290da2380.exe
4856	NEAS.665e38a9c0c37947cfe9d92290da2380.exe
4856	NEAS.665e38a9c0c37947cfe9d92290da2380.exe
4856	NEAS.665e38a9c0c37947cfe9d92290da2380.exe
4856	NEAS.665e38a9c0c37947cfe9d92290da2380.exe
1408	Client.exe
1408	Client.exe
1408	Client.exe
1408	Client.exe
1408	Client.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4856	NEAS.665e38a9c0c37947cfe9d92290da2380.exe
Token: SeDebugPrivilege	1408	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1408	Client.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4856 wrote to memory of 3988	4856	NEAS.665e38a9c0c37947cfe9d92290da2380.exe	88
PID 4856 wrote to memory of 3988	4856	NEAS.665e38a9c0c37947cfe9d92290da2380.exe	88
PID 4856 wrote to memory of 1408	4856	NEAS.665e38a9c0c37947cfe9d92290da2380.exe	91
PID 4856 wrote to memory of 1408	4856	NEAS.665e38a9c0c37947cfe9d92290da2380.exe	91
PID 1408 wrote to memory of 1848	1408	Client.exe	94
PID 1408 wrote to memory of 1848	1408	Client.exe	94
PID 1408 wrote to memory of 2812	1408	Client.exe	97
PID 1408 wrote to memory of 2812	1408	Client.exe	97

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\NEAS.665e38a9c0c37947cfe9d92290da2380.exe
"C:\Users\Admin\AppData\Local\Temp\NEAS.665e38a9c0c37947cfe9d92290da2380.exe"
1⤵
- Drops file in System32 directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4856
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "Windows.Troubleshooter" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\NEAS.665e38a9c0c37947cfe9d92290da2380.exe" /rl HIGHEST /f
  2⤵
  - Creates scheduled task(s)
  PID:3988
- C:\Windows\SysWOW64\SubDir\Client.exe
  "C:\Windows\SysWOW64\SubDir\Client.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Adds Run key to start application
  - Drops file in System32 directory
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1408
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "Windows.Troubleshooter" /sc ONLOGON /tr "C:\Windows\SysWOW64\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Creates scheduled task(s)
    PID:1848
- - C:\Windows\System32\schtasks.exe
    "C:\Windows\System32\schtasks.exe" /create /tn "WINDOWSSYSTEMHOST" /tr "C:\Windows\SysWOW64\SubDir\Client.exe" /sc MINUTE /MO 1
    3⤵
    - Creates scheduled task(s)
    PID:2812

C:\Windows\SysWOW64\SubDir\Client.exe
C:\Windows\SysWOW64\SubDir\Client.exe
1⤵
- Executes dropped EXE
PID:2836

C:\Windows\SysWOW64\SubDir\Client.exe
C:\Windows\SysWOW64\SubDir\Client.exe
1⤵
- Executes dropped EXE
PID:1700

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

Scheduled Task/Job

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

Scheduled Task/Job

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\Client.exe.log

Filesize
1KB

MD5
2362dcc9d262d0969898b143fb7fc91a

SHA1
2240860a675c86425f5702b501eac121bfb744eb

SHA256
4f7cff601d97caf1e0040bc2d63ccadd27294b2e551ff4167e0b080c69a915b0

SHA512
59cb7e53dc9cc02f25216cc87115403ed67fb5d24947ef2e803cd54e9f118d5d65a71817b05642c238ca48eb7bfd228d008d92e42023f2c15755c64c88f5b0d6

Download Submit
C:\Windows\SysWOW64\SubDir\Client.exe

Filesize
344KB

MD5
665e38a9c0c37947cfe9d92290da2380

SHA1
98088121719427b7e911c899f639ae007e624368

SHA256
dd338ea97fec386923cdfecf3ff4aecac8ac51e494ba8c7e208a1ba51f8f0242

SHA512
8e476e58f15f53807f7223b8d418177f3c4a6449713dadf9c20ed779c22f5d27ec47263dae698be3a2cfeb65c9db49d120d38301d47c2715ba9a440bb709190d

Download Submit
C:\Windows\SysWOW64\SubDir\Client.exe

Filesize
344KB

MD5
665e38a9c0c37947cfe9d92290da2380

SHA1
98088121719427b7e911c899f639ae007e624368

SHA256
dd338ea97fec386923cdfecf3ff4aecac8ac51e494ba8c7e208a1ba51f8f0242

SHA512
8e476e58f15f53807f7223b8d418177f3c4a6449713dadf9c20ed779c22f5d27ec47263dae698be3a2cfeb65c9db49d120d38301d47c2715ba9a440bb709190d

Download Submit
C:\Windows\SysWOW64\SubDir\Client.exe

Filesize
344KB

MD5
665e38a9c0c37947cfe9d92290da2380

SHA1
98088121719427b7e911c899f639ae007e624368

SHA256
dd338ea97fec386923cdfecf3ff4aecac8ac51e494ba8c7e208a1ba51f8f0242

SHA512
8e476e58f15f53807f7223b8d418177f3c4a6449713dadf9c20ed779c22f5d27ec47263dae698be3a2cfeb65c9db49d120d38301d47c2715ba9a440bb709190d

Download Submit
C:\Windows\SysWOW64\SubDir\Client.exe

Filesize
344KB

MD5
665e38a9c0c37947cfe9d92290da2380

SHA1
98088121719427b7e911c899f639ae007e624368

SHA256
dd338ea97fec386923cdfecf3ff4aecac8ac51e494ba8c7e208a1ba51f8f0242

SHA512
8e476e58f15f53807f7223b8d418177f3c4a6449713dadf9c20ed779c22f5d27ec47263dae698be3a2cfeb65c9db49d120d38301d47c2715ba9a440bb709190d

Download Submit
memory/1408-12-0x000000001B480000-0x000000001B490000-memory.dmp

Filesize
64KB

Download
memory/1408-11-0x00007FF827180000-0x00007FF827C41000-memory.dmp

Filesize
10.8MB

Download
memory/1408-16-0x00007FF827180000-0x00007FF827C41000-memory.dmp

Filesize
10.8MB

Download
memory/1408-17-0x000000001B480000-0x000000001B490000-memory.dmp

Filesize
64KB

Download
memory/1700-25-0x00007FF827180000-0x00007FF827C41000-memory.dmp

Filesize
10.8MB

Download
memory/1700-26-0x000000001AF60000-0x000000001AF70000-memory.dmp

Filesize
64KB

Download
memory/1700-27-0x00007FF827180000-0x00007FF827C41000-memory.dmp

Filesize
10.8MB

Download
memory/2836-20-0x00000000024D0000-0x00000000024E0000-memory.dmp

Filesize
64KB

Download
memory/2836-22-0x00007FF827180000-0x00007FF827C41000-memory.dmp

Filesize
10.8MB

Download
memory/2836-19-0x00007FF827180000-0x00007FF827C41000-memory.dmp

Filesize
10.8MB

Download
memory/4856-5-0x000000001AC50000-0x000000001AC8C000-memory.dmp

Filesize
240KB

Download
memory/4856-14-0x00007FF827180000-0x00007FF827C41000-memory.dmp

Filesize
10.8MB

Download
memory/4856-0-0x0000000000050000-0x0000000000058000-memory.dmp

Filesize
32KB

Download
memory/4856-4-0x000000001ABB0000-0x000000001ABC2000-memory.dmp

Filesize
72KB

Download
memory/4856-3-0x000000001AC40000-0x000000001AC50000-memory.dmp

Filesize
64KB

Download
memory/4856-2-0x00007FF827180000-0x00007FF827C41000-memory.dmp

Filesize
10.8MB

Download
memory/4856-1-0x0000000000800000-0x000000000089E000-memory.dmp

Filesize
632KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads