quasar | 6c53c6883113580b6118856a433c5b2fb49a208e33d2faedb77d1e8609919af9

General

Target

6c53c6883113580b6118856a433c5b2fb49a208e33d2faedb77d1e8609919af9.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 2 IoCs

resource	yara_rule
behavioral2/files/0x000c000000023b42-4.dat	family_quasar
behavioral2/memory/2960-14-0x00000000003F0000-0x0000000000714000-memory.dmp	family_quasar

Checks computer location settings 2 TTPs 2 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-1-5-21-3756129449-3121373848-4276368241-1000\Control Panel\International\Geo\Nation	6c53c6883113580b6118856a433c5b2fb49a208e33d2faedb77d1e8609919af9.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\Control Panel\International\Geo\Nation	jusched.exe

Executes dropped EXE 2 IoCs

pid	Process
2960	JUSCHED.EXE
3384	jusched.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

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	6c53c6883113580b6118856a433c5b2fb49a208e33d2faedb77d1e8609919af9.exe

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 1 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
1032	PING.EXE

Modifies registry class 2 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000_Classes\Local Settings	6c53c6883113580b6118856a433c5b2fb49a208e33d2faedb77d1e8609919af9.exe
Key created	\REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000_Classes\Local Settings	OpenWith.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1032	PING.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
4444	schtasks.exe
628	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2960	JUSCHED.EXE
Token: SeDebugPrivilege	3384	jusched.exe

Suspicious use of FindShellTrayWindow 3 IoCs

pid	Process
3384	jusched.exe
3384	jusched.exe
3384	jusched.exe

Suspicious use of SendNotifyMessage 3 IoCs

pid	Process
3384	jusched.exe
3384	jusched.exe
3384	jusched.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4796	OpenWith.exe
3384	jusched.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 552 wrote to memory of 2960	552	6c53c6883113580b6118856a433c5b2fb49a208e33d2faedb77d1e8609919af9.exe	82
PID 552 wrote to memory of 2960	552	6c53c6883113580b6118856a433c5b2fb49a208e33d2faedb77d1e8609919af9.exe	82
PID 2960 wrote to memory of 4444	2960	JUSCHED.EXE	84
PID 2960 wrote to memory of 4444	2960	JUSCHED.EXE	84
PID 2960 wrote to memory of 3384	2960	JUSCHED.EXE	86
PID 2960 wrote to memory of 3384	2960	JUSCHED.EXE	86
PID 3384 wrote to memory of 628	3384	jusched.exe	87
PID 3384 wrote to memory of 628	3384	jusched.exe	87
PID 3384 wrote to memory of 4408	3384	jusched.exe	97
PID 3384 wrote to memory of 4408	3384	jusched.exe	97
PID 3384 wrote to memory of 4832	3384	jusched.exe	99
PID 3384 wrote to memory of 4832	3384	jusched.exe	99
PID 4832 wrote to memory of 3676	4832	cmd.exe	101
PID 4832 wrote to memory of 3676	4832	cmd.exe	101
PID 4832 wrote to memory of 1032	4832	cmd.exe	102
PID 4832 wrote to memory of 1032	4832	cmd.exe	102

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\6c53c6883113580b6118856a433c5b2fb49a208e33d2faedb77d1e8609919af9.exe
"C:\Users\Admin\AppData\Local\Temp\6c53c6883113580b6118856a433c5b2fb49a208e33d2faedb77d1e8609919af9.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:552
- 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:2960
- - 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:4444
- - C:\Users\Admin\AppData\Roaming\Java\jusched.exe
    "C:\Users\Admin\AppData\Roaming\Java\jusched.exe"
    3⤵
    - Checks computer location settings
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of FindShellTrayWindow
    - Suspicious use of SendNotifyMessage
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:3384
  - - 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:628
  - - C:\Windows\SYSTEM32\schtasks.exe
      "schtasks" /delete /tn "Java Update Scheduler" /f
      4⤵
      PID:4408
  - - C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\5AVbzwhEg6HB.bat" "
      4⤵
      Suspicious use of WriteProcessMemory
      PID:4832
    - - C:\Windows\system32\chcp.com
        
        chcp 65001
        5⤵
        
        PID:3676
    - - C:\Windows\system32\PING.EXE
        
        ping -n 10 localhost
        5⤵
        System Network Configuration Discovery: Internet Connection Discovery
        Runs ping.exe
        
        PID:1032

C:\Windows\system32\OpenWith.exe
C:\Windows\system32\OpenWith.exe -Embedding
1⤵
- Modifies registry class
- Suspicious use of SetWindowsHookEx
PID:4796

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

2

T1012

Remote System Discovery

1

T1018

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

System Network Configuration Discovery

1

T1016

Internet Connection Discovery

1

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
1KB

MD5
baf55b95da4a601229647f25dad12878

SHA1
abc16954ebfd213733c4493fc1910164d825cac8

SHA256
ee954c5d8156fd8890e582c716e5758ed9b33721258f10e758bdc31ccbcb1924

SHA512
24f502fedb1a305d0d7b08857ffc1db9b2359ff34e06d5748ecc84e35c985f29a20d9f0a533bea32d234ab37097ec0481620c63b14ac89b280e75e14d19fd545

Download Submit
C:\Users\Admin\AppData\Local\Temp\5AVbzwhEg6HB.bat

Filesize
210B

MD5
a17eb39696625e57114629f29f0ceb6a

SHA1
cb09fcc16f3a3a8ad29b7b13fea33deb3e218e62

SHA256
a0d480707538774f5d3776de59e74e2a65b6f4fbecab6ccd0ee1fa061438a0b5

SHA512
1491642bd78bbc9e58bf2f53560013d4b7cfcffd0b1ebec8d76b119fbdba9f2915c081aacf61c4c787856ea7876578d794060b3434fcc80b22033951a31691f8

Download Submit
C:\Users\Admin\AppData\Local\Temp\JUSCHED.EXE

Filesize
3.1MB

MD5
de7dbb5ed397ff41da4b1de1af4fbac5

SHA1
fcf8b29628d4cae9109b642c3a65a20178cca98a

SHA256
acfffb20520bcc954ecf5cc107521efa96c76b0a43e61a83628f580dae87c996

SHA512
182afaabf28848d5ea2f2a55dc6e7ac5d1903f97e0f0640710e1ff8470c31f01ba68c0d8c548f16261a13a29488c34c91b61a2f8b958736eae126b766a42c5d8

Download Submit
memory/2960-13-0x00007FFAEEA33000-0x00007FFAEEA35000-memory.dmp

Filesize
8KB

Download
memory/2960-14-0x00000000003F0000-0x0000000000714000-memory.dmp

Filesize
3.1MB

Download
memory/2960-15-0x00007FFAEEA30000-0x00007FFAEF4F1000-memory.dmp

Filesize
10.8MB

Download
memory/2960-23-0x00007FFAEEA30000-0x00007FFAEF4F1000-memory.dmp

Filesize
10.8MB

Download
memory/3384-24-0x000000001C2C0000-0x000000001C310000-memory.dmp

Filesize
320KB

Download
memory/3384-25-0x000000001C3D0000-0x000000001C482000-memory.dmp

Filesize
712KB

Download
memory/3384-28-0x000000001C340000-0x000000001C352000-memory.dmp

Filesize
72KB

Download
memory/3384-29-0x000000001CBD0000-0x000000001CC0C000-memory.dmp

Filesize
240KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads