quasar | e70d3052f010b4dd1d942232fa24e52a8ac42dfa3d32ac8019c473e91d75748a

General

Target

rye.exe
Size

3.1MB
MD5

39249134ee254528793864dac9b3415b
SHA1

4ea6648cc6d44968901d290ea73945b7e7cd9ab1
SHA256

e70d3052f010b4dd1d942232fa24e52a8ac42dfa3d32ac8019c473e91d75748a
SHA512

516bad12c22b8f1b19f56112dc82da99d9af9478dfbda3e2933ccb244964ff0d9331f3bec4c62483313ff2e3f795ce1e318eeaf81b94a8ec19844f632f941a4b
SSDEEP

49152:HvHG42pda6D+/PjlLOlg6yQipV64m7mzjLoGd50THHB72eh2NT:Hvm42pda6D+/PjlLOlZyQipV64mAJ

Score

10^/10

quasar thecoolfile spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

thecoolfile

C2

dfsgmnhsrf23456623423456-20848.portmap.host:20848

Mutex

83c15bb2-6249-4f2e-a6a8-94b180bf1a42

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
behavioral1/memory/4368-1-0x00000000007A0000-0x0000000000AC4000-memory.dmp	family_quasar
behavioral1/files/0x00500000000450b5-3.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
3772	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
1540	schtasks.exe
3844	schtasks.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4436	taskmgr.exe
4436	taskmgr.exe
4436	taskmgr.exe
4436	taskmgr.exe
4436	taskmgr.exe
4436	taskmgr.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	4368	rye.exe
Token: SeDebugPrivilege	3772	windows defender.exe
Token: SeDebugPrivilege	4436	taskmgr.exe
Token: SeSystemProfilePrivilege	4436	taskmgr.exe
Token: SeCreateGlobalPrivilege	4436	taskmgr.exe

Suspicious use of FindShellTrayWindow 18 IoCs

pid	Process
4436	taskmgr.exe
4436	taskmgr.exe
4436	taskmgr.exe
4436	taskmgr.exe
4436	taskmgr.exe
4436	taskmgr.exe
4436	taskmgr.exe
4436	taskmgr.exe
4436	taskmgr.exe
4436	taskmgr.exe
4436	taskmgr.exe
4436	taskmgr.exe
4436	taskmgr.exe
4436	taskmgr.exe
4436	taskmgr.exe
4436	taskmgr.exe
4436	taskmgr.exe
4436	taskmgr.exe

Suspicious use of SendNotifyMessage 18 IoCs

pid	Process
4436	taskmgr.exe
4436	taskmgr.exe
4436	taskmgr.exe
4436	taskmgr.exe
4436	taskmgr.exe
4436	taskmgr.exe
4436	taskmgr.exe
4436	taskmgr.exe
4436	taskmgr.exe
4436	taskmgr.exe
4436	taskmgr.exe
4436	taskmgr.exe
4436	taskmgr.exe
4436	taskmgr.exe
4436	taskmgr.exe
4436	taskmgr.exe
4436	taskmgr.exe
4436	taskmgr.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3772	windows defender.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4368 wrote to memory of 1540	4368	rye.exe	82
PID 4368 wrote to memory of 1540	4368	rye.exe	82
PID 4368 wrote to memory of 3772	4368	rye.exe	84
PID 4368 wrote to memory of 3772	4368	rye.exe	84
PID 3772 wrote to memory of 3844	3772	windows defender.exe	85
PID 3772 wrote to memory of 3844	3772	windows defender.exe	85

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\rye.exe
"C:\Users\Admin\AppData\Local\Temp\rye.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4368
- 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:1540
- 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:3772
- - 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:3844

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:4436

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
39249134ee254528793864dac9b3415b

SHA1
4ea6648cc6d44968901d290ea73945b7e7cd9ab1

SHA256
e70d3052f010b4dd1d942232fa24e52a8ac42dfa3d32ac8019c473e91d75748a

SHA512
516bad12c22b8f1b19f56112dc82da99d9af9478dfbda3e2933ccb244964ff0d9331f3bec4c62483313ff2e3f795ce1e318eeaf81b94a8ec19844f632f941a4b

Download Submit
memory/3772-5-0x00007FFC9AAE0000-0x00007FFC9B5A2000-memory.dmp

Filesize
10.8MB

Download
memory/3772-7-0x00007FFC9AAE0000-0x00007FFC9B5A2000-memory.dmp

Filesize
10.8MB

Download
memory/3772-8-0x000000001B9D0000-0x000000001BA20000-memory.dmp

Filesize
320KB

Download
memory/3772-9-0x000000001D0A0000-0x000000001D152000-memory.dmp

Filesize
712KB

Download
memory/3772-10-0x00007FFC9AAE0000-0x00007FFC9B5A2000-memory.dmp

Filesize
10.8MB

Download
memory/4368-0-0x00007FFC9AAE3000-0x00007FFC9AAE5000-memory.dmp

Filesize
8KB

Download
memory/4368-1-0x00000000007A0000-0x0000000000AC4000-memory.dmp

Filesize
3.1MB

Download
memory/4368-2-0x00007FFC9AAE0000-0x00007FFC9B5A2000-memory.dmp

Filesize
10.8MB

Download
memory/4368-6-0x00007FFC9AAE0000-0x00007FFC9B5A2000-memory.dmp

Filesize
10.8MB

Download
memory/4436-11-0x0000026183440000-0x0000026183441000-memory.dmp

Filesize
4KB

Download
memory/4436-12-0x0000026183440000-0x0000026183441000-memory.dmp

Filesize
4KB

Download
memory/4436-13-0x0000026183440000-0x0000026183441000-memory.dmp

Filesize
4KB

Download
memory/4436-23-0x0000026183440000-0x0000026183441000-memory.dmp

Filesize
4KB

Download
memory/4436-22-0x0000026183440000-0x0000026183441000-memory.dmp

Filesize
4KB

Download
memory/4436-21-0x0000026183440000-0x0000026183441000-memory.dmp

Filesize
4KB

Download
memory/4436-20-0x0000026183440000-0x0000026183441000-memory.dmp

Filesize
4KB

Download
memory/4436-19-0x0000026183440000-0x0000026183441000-memory.dmp

Filesize
4KB

Download
memory/4436-18-0x0000026183440000-0x0000026183441000-memory.dmp

Filesize
4KB

Download
memory/4436-17-0x0000026183440000-0x0000026183441000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads