quasar | 03b2932cc0f1fff6bf01c1e561ad3b02b0e3db0c9cacd02f4f3198902b1ad7df

General

Target

churrois.exe
Size

3.1MB
MD5

59f414f74a8a0bae1a8ff0ea4b045020
SHA1

23500e649843bf0e3075da18b3c5789dc4fa6505
SHA256

03b2932cc0f1fff6bf01c1e561ad3b02b0e3db0c9cacd02f4f3198902b1ad7df
SHA512

a471c66f59311fc97dada64846a9c10109c3d455f8673b2c09f09f4513370d5384cb6509b63f549a212efefef33c37d0dda9225c49dd44b45f50fc3d42ff0d62
SSDEEP

49152:zvelL26AaNeWgPhlmVqvMQ7XSKjizD+YMfrDoGdfTHHB72eh2NT:zvOL26AaNeWgPhlmVqkQ7XSKjizD+L

Score

10^/10

quasar roar spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

roar

C2

fojeweb571-59106.portmap.host:59106

Mutex

0c203952-83f0-40e8-a93c-b701163cc930

Attributes

encryption_key
B42CE86AEBA4D8818352F4D811EA7BBB472E229A
install_name
windows defender.exe
log_directory
Logs
reconnect_delay
3000
startup_key
discord
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/memory/3700-1-0x0000000000210000-0x0000000000534000-memory.dmp	family_quasar
behavioral2/files/0x001c00000002aa81-8.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
4204	windows defender.exe

Checks SCSI registry key(s) 3 TTPs 3 IoCs

SCSI information is often read in order to detect sandboxing environments.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_WDC&Prod_WDS100T2B0A\4&215468a5&0&000000	taskmgr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_WDC&Prod_WDS100T2B0A\4&215468a5&0&000000\Properties\{b725f130-47ef-101a-a5f1-02608c9eebac}\000A	taskmgr.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_WDC&Prod_WDS100T2B0A\4&215468a5&0&000000\FriendlyName	taskmgr.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
2764	schtasks.exe
2620	schtasks.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
4672	taskmgr.exe
4672	taskmgr.exe
4672	taskmgr.exe
4672	taskmgr.exe
4672	taskmgr.exe
4672	taskmgr.exe
4672	taskmgr.exe
4672	taskmgr.exe
4672	taskmgr.exe

Suspicious use of AdjustPrivilegeToken 7 IoCs

description	pid	Process
Token: SeDebugPrivilege	3700	churrois.exe
Token: SeDebugPrivilege	4204	windows defender.exe
Token: SeDebugPrivilege	4672	taskmgr.exe
Token: SeSystemProfilePrivilege	4672	taskmgr.exe
Token: SeCreateGlobalPrivilege	4672	taskmgr.exe
Token: 33	4672	taskmgr.exe
Token: SeIncBasePriorityPrivilege	4672	taskmgr.exe

Suspicious use of FindShellTrayWindow 34 IoCs

pid	Process
4672	taskmgr.exe
4672	taskmgr.exe
4672	taskmgr.exe
4672	taskmgr.exe
4672	taskmgr.exe
4672	taskmgr.exe
4672	taskmgr.exe
4672	taskmgr.exe
4672	taskmgr.exe
4672	taskmgr.exe
4672	taskmgr.exe
4672	taskmgr.exe
4672	taskmgr.exe
4672	taskmgr.exe
4672	taskmgr.exe
4672	taskmgr.exe
4672	taskmgr.exe
4672	taskmgr.exe
4672	taskmgr.exe
4672	taskmgr.exe
4672	taskmgr.exe
4672	taskmgr.exe
4672	taskmgr.exe
4672	taskmgr.exe
4672	taskmgr.exe
4672	taskmgr.exe
4672	taskmgr.exe
4672	taskmgr.exe
4672	taskmgr.exe
4672	taskmgr.exe
4672	taskmgr.exe
4672	taskmgr.exe
4672	taskmgr.exe
4672	taskmgr.exe

Suspicious use of SendNotifyMessage 34 IoCs

pid	Process
4672	taskmgr.exe
4672	taskmgr.exe
4672	taskmgr.exe
4672	taskmgr.exe
4672	taskmgr.exe
4672	taskmgr.exe
4672	taskmgr.exe
4672	taskmgr.exe
4672	taskmgr.exe
4672	taskmgr.exe
4672	taskmgr.exe
4672	taskmgr.exe
4672	taskmgr.exe
4672	taskmgr.exe
4672	taskmgr.exe
4672	taskmgr.exe
4672	taskmgr.exe
4672	taskmgr.exe
4672	taskmgr.exe
4672	taskmgr.exe
4672	taskmgr.exe
4672	taskmgr.exe
4672	taskmgr.exe
4672	taskmgr.exe
4672	taskmgr.exe
4672	taskmgr.exe
4672	taskmgr.exe
4672	taskmgr.exe
4672	taskmgr.exe
4672	taskmgr.exe
4672	taskmgr.exe
4672	taskmgr.exe
4672	taskmgr.exe
4672	taskmgr.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4204	windows defender.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3700 wrote to memory of 2764	3700	churrois.exe	77
PID 3700 wrote to memory of 2764	3700	churrois.exe	77
PID 3700 wrote to memory of 4204	3700	churrois.exe	79
PID 3700 wrote to memory of 4204	3700	churrois.exe	79
PID 4204 wrote to memory of 2620	4204	windows defender.exe	80
PID 4204 wrote to memory of 2620	4204	windows defender.exe	80

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\churrois.exe
"C:\Users\Admin\AppData\Local\Temp\churrois.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3700
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "discord" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\windows defender.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2764
- C:\Users\Admin\AppData\Roaming\SubDir\windows defender.exe
  "C:\Users\Admin\AppData\Roaming\SubDir\windows defender.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4204
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "discord" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\windows defender.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2620

C:\Windows\system32\taskmgr.exe
"C:\Windows\system32\taskmgr.exe" /0
1⤵
- Checks SCSI registry key(s)
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
PID:4672

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

Peripheral Device Discovery

Query Registry

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\SubDir\windows defender.exe

Filesize
3.1MB

MD5
59f414f74a8a0bae1a8ff0ea4b045020

SHA1
23500e649843bf0e3075da18b3c5789dc4fa6505

SHA256
03b2932cc0f1fff6bf01c1e561ad3b02b0e3db0c9cacd02f4f3198902b1ad7df

SHA512
a471c66f59311fc97dada64846a9c10109c3d455f8673b2c09f09f4513370d5384cb6509b63f549a212efefef33c37d0dda9225c49dd44b45f50fc3d42ff0d62

Download Submit
memory/3700-0-0x00007FFEC3A73000-0x00007FFEC3A75000-memory.dmp

Filesize
8KB

Download
memory/3700-1-0x0000000000210000-0x0000000000534000-memory.dmp

Filesize
3.1MB

Download
memory/3700-2-0x00007FFEC3A70000-0x00007FFEC4532000-memory.dmp

Filesize
10.8MB

Download
memory/3700-9-0x00007FFEC3A70000-0x00007FFEC4532000-memory.dmp

Filesize
10.8MB

Download
memory/4204-10-0x00007FFEC3A70000-0x00007FFEC4532000-memory.dmp

Filesize
10.8MB

Download
memory/4204-11-0x00007FFEC3A70000-0x00007FFEC4532000-memory.dmp

Filesize
10.8MB

Download
memory/4204-13-0x000000001B910000-0x000000001B9C2000-memory.dmp

Filesize
712KB

Download
memory/4204-12-0x000000001AE40000-0x000000001AE90000-memory.dmp

Filesize
320KB

Download
memory/4204-14-0x00007FFEC3A70000-0x00007FFEC4532000-memory.dmp

Filesize
10.8MB

Download
memory/4672-15-0x0000024AED340000-0x0000024AED341000-memory.dmp

Filesize
4KB

Download
memory/4672-16-0x0000024AED340000-0x0000024AED341000-memory.dmp

Filesize
4KB

Download
memory/4672-17-0x0000024AED340000-0x0000024AED341000-memory.dmp

Filesize
4KB

Download
memory/4672-21-0x0000024AED340000-0x0000024AED341000-memory.dmp

Filesize
4KB

Download
memory/4672-22-0x0000024AED340000-0x0000024AED341000-memory.dmp

Filesize
4KB

Download
memory/4672-23-0x0000024AED340000-0x0000024AED341000-memory.dmp

Filesize
4KB

Download
memory/4672-26-0x0000024AED340000-0x0000024AED341000-memory.dmp

Filesize
4KB

Download
memory/4672-25-0x0000024AED340000-0x0000024AED341000-memory.dmp

Filesize
4KB

Download
memory/4672-27-0x0000024AED340000-0x0000024AED341000-memory.dmp

Filesize
4KB

Download
memory/4672-24-0x0000024AED340000-0x0000024AED341000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads