quasar | f65322422149c55e52509d96d6050a36618fd48379b65e340882c5b770370412

General

Target

Crunchyroll GEN_.exe
Size

3.1MB
MD5

697aba2b3c2bc4028ad287b364101483
SHA1

4024c8f79c0e99f520ee4bbba87fef93e688ab97
SHA256

f65322422149c55e52509d96d6050a36618fd48379b65e340882c5b770370412
SHA512

b231d37d4df57cfe36275f8f1ed2e106dbf6619b295eabcc73518cf016c50860142c28697ac6a4d61973685fd28e37460493da27f153c130df440d1c2a28b5f0
SSDEEP

49152:65tesQb25VTAQ3wv9qspqyyDuVQFKCAdkuwiIak0LfNshLq:6PesQbUVcQAv9IzGKAdkoIhL

Score

10^/10

quasar testtsr defense_evasion discovery spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

testTSR

C2

testTSR-35311.portmap.host:35311

Mutex

b1c1e27b-0ae6-47f6-b162-8a3ca61fd7d0

Attributes

encryption_key
3E520C89AF59AB576F107D67332A341C23090C0B
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Quasar Client Startup
subdirectory
SubDir

Signatures

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

Quasar payload 3 IoCs

resource	yara_rule
behavioral1/files/0x0007000000012119-2.dat	family_quasar
behavioral1/memory/1936-8-0x0000000000D00000-0x0000000001024000-memory.dmp	family_quasar
behavioral1/memory/2744-14-0x0000000000BA0000-0x0000000000EC4000-memory.dmp	family_quasar

Executes dropped EXE 2 IoCs

pid	Process
1936	client.exe
2744	Client.exe

Loads dropped DLL 1 IoCs

pid	Process
1928	Crunchyroll GEN_.exe

Obfuscated Files or Information: Command Obfuscation 1 TTPs
Adversaries may obfuscate content during command execution to impede detection.
defense_evasion

Command Obfuscation
T1027.010
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 2 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	Crunchyroll GEN_.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.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
2688	schtasks.exe
2848	schtasks.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2300	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2300	powershell.exe
Token: SeDebugPrivilege	1936	client.exe
Token: SeDebugPrivilege	2744	Client.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2744	Client.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
2744	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2744	Client.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 1928 wrote to memory of 2300	1928	Crunchyroll GEN_.exe	30
PID 1928 wrote to memory of 2300	1928	Crunchyroll GEN_.exe	30
PID 1928 wrote to memory of 2300	1928	Crunchyroll GEN_.exe	30
PID 1928 wrote to memory of 2300	1928	Crunchyroll GEN_.exe	30
PID 1928 wrote to memory of 1936	1928	Crunchyroll GEN_.exe	32
PID 1928 wrote to memory of 1936	1928	Crunchyroll GEN_.exe	32
PID 1928 wrote to memory of 1936	1928	Crunchyroll GEN_.exe	32
PID 1928 wrote to memory of 1936	1928	Crunchyroll GEN_.exe	32
PID 1936 wrote to memory of 2688	1936	client.exe	33
PID 1936 wrote to memory of 2688	1936	client.exe	33
PID 1936 wrote to memory of 2688	1936	client.exe	33
PID 1936 wrote to memory of 2744	1936	client.exe	35
PID 1936 wrote to memory of 2744	1936	client.exe	35
PID 1936 wrote to memory of 2744	1936	client.exe	35
PID 2744 wrote to memory of 2848	2744	Client.exe	36
PID 2744 wrote to memory of 2848	2744	Client.exe	36
PID 2744 wrote to memory of 2848	2744	Client.exe	36

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\Crunchyroll GEN_.exe
"C:\Users\Admin\AppData\Local\Temp\Crunchyroll GEN_.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1928
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -EncodedCommand "PAAjAGMAeQB1ACMAPgBBAGQAZAAtAFQAeQBwAGUAIAAtAEEAcwBzAGUAbQBiAGwAeQBOAGEAbQBlACAAUwB5AHMAdABlAG0ALgBXAGkAbgBkAG8AdwBzAC4ARgBvAHIAbQBzADsAPAAjAHMAZwBhACMAPgBbAFMAeQBzAHQAZQBtAC4AVwBpAG4AZABvAHcAcwAuAEYAbwByAG0AcwAuAE0AZQBzAHMAYQBnAGUAQgBvAHgAXQA6ADoAUwBoAG8AdwAoACcAZwBlAG4AZQByAGEAdABpAG8AbgAgAG4AbwB0ACAAYQBsAGwAbwB3AGUAZAAnACwAJwAnACwAJwBPAEsAJwAsACcARQByAHIAbwByACcAKQA8ACMAaQBhAGMAIwA+AA=="
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2300
- C:\Users\Admin\AppData\Local\Temp\client.exe
  "C:\Users\Admin\AppData\Local\Temp\client.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1936
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2688
- - C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
    "C:\Users\Admin\AppData\Roaming\SubDir\Client.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:2744
  - - C:\Windows\system32\schtasks.exe
      "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
      4⤵
      Scheduled Task/Job: Scheduled Task
      PID:2848

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

Obfuscated Files or Information

1

T1027

Command Obfuscation

1

T1027.010

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

Replay Monitor

Loading Replay Monitor...

Downloads

\Users\Admin\AppData\Local\Temp\client.exe

Filesize
3.1MB

MD5
3eaf3273123af861e0b9c625524bd3df

SHA1
c502e34fe5a1be4c62b9a06ee10e61a3859e0d52

SHA256
c28efda8c4be5e1022e3a4a6165f5ceb8a7a73de3f0b5be52e820561bc0db0fc

SHA512
f2901c71613fa99b49196fc0bb5937fb0d361e56cd789d9929904682bc11a280f0ef46f0dc3910f593fe2dcc494fa6e3712313236105a994b88b36749d053543

Download Submit
memory/1936-8-0x0000000000D00000-0x0000000001024000-memory.dmp

Filesize
3.1MB

Download
memory/2744-14-0x0000000000BA0000-0x0000000000EC4000-memory.dmp

Filesize
3.1MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads