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 2 IoCs

resource	yara_rule
behavioral2/files/0x000b000000023bb1-4.dat	family_quasar
behavioral2/memory/4996-15-0x0000000000A90000-0x0000000000DB4000-memory.dmp	family_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-1-5-21-1045960512-3948844814-3059691613-1000\Control Panel\International\Geo\Nation	Crunchyroll GEN_.exe

Executes dropped EXE 2 IoCs

pid	Process
4996	client.exe
4512	Client.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	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Crunchyroll GEN_.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
3756	schtasks.exe
556	schtasks.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4192	powershell.exe
4192	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	4996	client.exe
Token: SeDebugPrivilege	4192	powershell.exe
Token: SeDebugPrivilege	4512	Client.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
4512	Client.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
4512	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4512	Client.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 4308 wrote to memory of 4192	4308	Crunchyroll GEN_.exe	83
PID 4308 wrote to memory of 4192	4308	Crunchyroll GEN_.exe	83
PID 4308 wrote to memory of 4192	4308	Crunchyroll GEN_.exe	83
PID 4308 wrote to memory of 4996	4308	Crunchyroll GEN_.exe	85
PID 4308 wrote to memory of 4996	4308	Crunchyroll GEN_.exe	85
PID 4996 wrote to memory of 3756	4996	client.exe	86
PID 4996 wrote to memory of 3756	4996	client.exe	86
PID 4996 wrote to memory of 4512	4996	client.exe	88
PID 4996 wrote to memory of 4512	4996	client.exe	88
PID 4512 wrote to memory of 556	4512	Client.exe	89
PID 4512 wrote to memory of 556	4512	Client.exe	89

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⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4308
- 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:4192
- 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:4996
- - 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:3756
- - 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:4512
  - - 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:556

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

2

T1012

System Information Discovery

2

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

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

Filesize
1KB

MD5
baf55b95da4a601229647f25dad12878

SHA1
abc16954ebfd213733c4493fc1910164d825cac8

SHA256
ee954c5d8156fd8890e582c716e5758ed9b33721258f10e758bdc31ccbcb1924

SHA512
24f502fedb1a305d0d7b08857ffc1db9b2359ff34e06d5748ecc84e35c985f29a20d9f0a533bea32d234ab37097ec0481620c63b14ac89b280e75e14d19fd545

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_kgpj1rcr.i43.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\client.exe

Filesize
3.1MB

MD5
3eaf3273123af861e0b9c625524bd3df

SHA1
c502e34fe5a1be4c62b9a06ee10e61a3859e0d52

SHA256
c28efda8c4be5e1022e3a4a6165f5ceb8a7a73de3f0b5be52e820561bc0db0fc

SHA512
f2901c71613fa99b49196fc0bb5937fb0d361e56cd789d9929904682bc11a280f0ef46f0dc3910f593fe2dcc494fa6e3712313236105a994b88b36749d053543

Download Submit
memory/4192-17-0x0000000073C00000-0x00000000743B0000-memory.dmp

Filesize
7.7MB

Download
memory/4192-32-0x00000000067A0000-0x00000000067BE000-memory.dmp

Filesize
120KB

Download
memory/4192-16-0x0000000073C00000-0x00000000743B0000-memory.dmp

Filesize
7.7MB

Download
memory/4192-13-0x00000000031E0000-0x0000000003216000-memory.dmp

Filesize
216KB

Download
memory/4192-14-0x00000000058E0000-0x0000000005F08000-memory.dmp

Filesize
6.2MB

Download
memory/4192-49-0x0000000073C00000-0x00000000743B0000-memory.dmp

Filesize
7.7MB

Download
memory/4192-19-0x00000000057E0000-0x0000000005802000-memory.dmp

Filesize
136KB

Download
memory/4192-20-0x00000000060C0000-0x0000000006126000-memory.dmp

Filesize
408KB

Download
memory/4192-21-0x0000000006130000-0x0000000006196000-memory.dmp

Filesize
408KB

Download
memory/4192-12-0x0000000073C0E000-0x0000000073C0F000-memory.dmp

Filesize
4KB

Download
memory/4192-31-0x00000000061A0000-0x00000000064F4000-memory.dmp

Filesize
3.3MB

Download
memory/4192-44-0x0000000007B70000-0x0000000007C02000-memory.dmp

Filesize
584KB

Download
memory/4192-33-0x00000000067C0000-0x000000000680C000-memory.dmp

Filesize
304KB

Download
memory/4192-43-0x0000000008A40000-0x0000000008FE4000-memory.dmp

Filesize
5.6MB

Download
memory/4192-41-0x0000000007E10000-0x000000000848A000-memory.dmp

Filesize
6.5MB

Download
memory/4192-42-0x0000000006CA0000-0x0000000006CBA000-memory.dmp

Filesize
104KB

Download
memory/4512-45-0x000000001C110000-0x000000001C160000-memory.dmp

Filesize
320KB

Download
memory/4512-46-0x000000001C220000-0x000000001C2D2000-memory.dmp

Filesize
712KB

Download
memory/4996-11-0x00007FFA102C3000-0x00007FFA102C5000-memory.dmp

Filesize
8KB

Download
memory/4996-15-0x0000000000A90000-0x0000000000DB4000-memory.dmp

Filesize
3.1MB

Download
memory/4996-18-0x0000000002E60000-0x0000000002E70000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads