quasar | 6c53c6883113580b6118856a433c5b2fb49a208e33d2faedb77d1e8609919af9

General

Target

39234b4b1387d417161e87d99f46f5d4.exe
Size

3.2MB
MD5

39234b4b1387d417161e87d99f46f5d4
SHA1

1b9239eea2e7cbf721cc4b71a7397ea49d3d0348
SHA256

6c53c6883113580b6118856a433c5b2fb49a208e33d2faedb77d1e8609919af9
SHA512

0afaf23be317dafb306365e21134a00aeb650b5bb1749d8e65f9361a67200c417c042233704f01628609ca3f2c2ed9295cdcb0b945a74b99ef9e1dee541a3817
SSDEEP

49152:lnvnI22SsaNYfdPBldt698dBcjHGcHZmzO8oGdG6THHB72eh2NT:lnvI22SsaNYfdPBldt6+dBcjHGcHQ

Score

10^/10

quasar ddns discovery spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

DDNS

C2

193.161.193.99:32471

Mutex

807f3187-d087-4fff-beff-e73293a32af8

Attributes

encryption_key
81A0C14D4C705B3C678E573C849DE7F6A3671A8B
install_name
jusched.exe
log_directory
CachedLogs
reconnect_delay
3000
startup_key
Java Update Scheduler
subdirectory
Java

Signatures

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

Quasar payload 3 IoCs

Processes:

resource	yara_rule
\Users\Admin\AppData\Local\Temp\JUSCHED.EXE	family_quasar
behavioral1/memory/2320-8-0x0000000000890000-0x0000000000BB4000-memory.dmp	family_quasar
behavioral1/memory/2148-16-0x0000000000350000-0x0000000000674000-memory.dmp	family_quasar

Executes dropped EXE 2 IoCs

Processes:

JUSCHED.EXEjusched.exe

pid process

2320 JUSCHED.EXE
2148 jusched.exe
Loads dropped DLL 1 IoCs

Processes:

39234b4b1387d417161e87d99f46f5d4.exe

pid process

2460 39234b4b1387d417161e87d99f46f5d4.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 1 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

Processes:

39234b4b1387d417161e87d99f46f5d4.exe

description ioc process

Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language 39234b4b1387d417161e87d99f46f5d4.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

Processes:

schtasks.exeschtasks.exe

pid process

936 schtasks.exe
2724 schtasks.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

JUSCHED.EXEjusched.exe

description pid process

Token: SeDebugPrivilege 2320 JUSCHED.EXE
Token: SeDebugPrivilege 2148 jusched.exe
Suspicious use of FindShellTrayWindow 1 IoCs

Processes:

jusched.exe

pid process

2148 jusched.exe
Suspicious use of SendNotifyMessage 1 IoCs

Processes:

jusched.exe

pid process

2148 jusched.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

jusched.exe

pid process

2148 jusched.exe

pid	process
2320	JUSCHED.EXE
2148	jusched.exe

pid	process
2460	39234b4b1387d417161e87d99f46f5d4.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	39234b4b1387d417161e87d99f46f5d4.exe

pid	process
936	schtasks.exe
2724	schtasks.exe

description	pid	process
Token: SeDebugPrivilege	2320	JUSCHED.EXE
Token: SeDebugPrivilege	2148	jusched.exe

pid	process
2148	jusched.exe

pid	process
2148	jusched.exe

pid	process
2148	jusched.exe

Suspicious use of WriteProcessMemory 13 IoCs

Processes:

39234b4b1387d417161e87d99f46f5d4.exeJUSCHED.EXEjusched.exe

description	pid	process	target process
PID 2460 wrote to memory of 2320	2460	39234b4b1387d417161e87d99f46f5d4.exe	JUSCHED.EXE
PID 2460 wrote to memory of 2320	2460	39234b4b1387d417161e87d99f46f5d4.exe	JUSCHED.EXE
PID 2460 wrote to memory of 2320	2460	39234b4b1387d417161e87d99f46f5d4.exe	JUSCHED.EXE
PID 2460 wrote to memory of 2320	2460	39234b4b1387d417161e87d99f46f5d4.exe	JUSCHED.EXE
PID 2320 wrote to memory of 936	2320	JUSCHED.EXE	schtasks.exe
PID 2320 wrote to memory of 936	2320	JUSCHED.EXE	schtasks.exe
PID 2320 wrote to memory of 936	2320	JUSCHED.EXE	schtasks.exe
PID 2320 wrote to memory of 2148	2320	JUSCHED.EXE	jusched.exe
PID 2320 wrote to memory of 2148	2320	JUSCHED.EXE	jusched.exe
PID 2320 wrote to memory of 2148	2320	JUSCHED.EXE	jusched.exe
PID 2148 wrote to memory of 2724	2148	jusched.exe	schtasks.exe
PID 2148 wrote to memory of 2724	2148	jusched.exe	schtasks.exe
PID 2148 wrote to memory of 2724	2148	jusched.exe	schtasks.exe

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\39234b4b1387d417161e87d99f46f5d4.exe
"C:\Users\Admin\AppData\Local\Temp\39234b4b1387d417161e87d99f46f5d4.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2460
- C:\Users\Admin\AppData\Local\Temp\JUSCHED.EXE
  "C:\Users\Admin\AppData\Local\Temp\JUSCHED.EXE"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2320
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn "Java Update Scheduler" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Java\jusched.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:936
- - C:\Users\Admin\AppData\Roaming\Java\jusched.exe
    "C:\Users\Admin\AppData\Roaming\Java\jusched.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of FindShellTrayWindow
    - Suspicious use of SendNotifyMessage
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:2148
  - - C:\Windows\system32\schtasks.exe
      "schtasks" /create /tn "Java Update Scheduler" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Java\jusched.exe" /rl HIGHEST /f
      4⤵
      Scheduled Task/Job: Scheduled Task
      PID:2724

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

\Users\Admin\AppData\Local\Temp\JUSCHED.EXE

Filesize
3.1MB

MD5
de7dbb5ed397ff41da4b1de1af4fbac5

SHA1
fcf8b29628d4cae9109b642c3a65a20178cca98a

SHA256
acfffb20520bcc954ecf5cc107521efa96c76b0a43e61a83628f580dae87c996

SHA512
182afaabf28848d5ea2f2a55dc6e7ac5d1903f97e0f0640710e1ff8470c31f01ba68c0d8c548f16261a13a29488c34c91b61a2f8b958736eae126b766a42c5d8

Download Submit
memory/2148-16-0x0000000000350000-0x0000000000674000-memory.dmp

Filesize
3.1MB

Download
memory/2320-7-0x000007FEF5803000-0x000007FEF5804000-memory.dmp

Filesize
4KB

Download
memory/2320-8-0x0000000000890000-0x0000000000BB4000-memory.dmp

Filesize
3.1MB

Download
memory/2320-9-0x000007FEF5800000-0x000007FEF61EC000-memory.dmp

Filesize
9.9MB

Download
memory/2320-15-0x000007FEF5800000-0x000007FEF61EC000-memory.dmp

Filesize
9.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads