quasar | ec5fa919b523ea3effb48a867b496d30a3bbf2208bc5652f812ebd0d87889ad0

General

Target

loader.exe
Size

4.8MB
MD5

a7162b6eabcdb753b8ec85bda90af43c
SHA1

e837aa3e994604f84c3adb4f6a10dc602e326a3e
SHA256

ec5fa919b523ea3effb48a867b496d30a3bbf2208bc5652f812ebd0d87889ad0
SHA512

3aeb0173d2169d9607a9e9e12c6ded9a2e0ab68b3c522ef287d3d5245b8c9eceec903685e30698711678664c6e002f09c224b61eaadd0cd54e1646104da8a4e4
SSDEEP

98304:seblXFo9C2j9+slcz8nUN6aaVFS0yi8hjOkWHCDwfIH7gDEgpzx:jZXFiCzsqz8JVFw/mHUwIMoCz

Score

10^/10

quasar dilly evasion spyware themida trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

dilly

C2

lvke-45989.portmap.host:45989

Mutex

0cb49dc2-fd0d-4581-ae1e-04154c41f310

Attributes

encryption_key
E5250226804167CB0B1B4B0E9667D0C056694DCA
install_name
defenderx64.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Windows Defender Helper
subdirectory
en

Signatures

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

Quasar payload 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4696-10-0x0000000000400000-0x000000000109A000-memory.dmp	family_quasar
behavioral2/memory/4696-11-0x0000000000400000-0x000000000109A000-memory.dmp	family_quasar
behavioral2/memory/4696-22-0x0000000000400000-0x000000000109A000-memory.dmp	family_quasar
behavioral2/memory/2636-24-0x0000000000400000-0x000000000109A000-memory.dmp	family_quasar
behavioral2/memory/2636-25-0x0000000000400000-0x000000000109A000-memory.dmp	family_quasar

Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 2 IoCs

evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

Processes:

loader.exedefenderx64.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	loader.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	defenderx64.exe

Checks BIOS information in registry 2 TTPs 4 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

Processes:

defenderx64.exeloader.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	defenderx64.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	loader.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	loader.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	defenderx64.exe

Executes dropped EXE 1 IoCs

Processes:

defenderx64.exe

pid process

2636 defenderx64.exe

pid	process
2636	defenderx64.exe

Themida packer 6 IoCs

Detects Themida, an advanced Windows software protection system.

themida

Processes:

resource	yara_rule
behavioral2/memory/4696-10-0x0000000000400000-0x000000000109A000-memory.dmp	themida
behavioral2/memory/4696-11-0x0000000000400000-0x000000000109A000-memory.dmp	themida
C:\Users\Admin\AppData\Roaming\en\defenderx64.exe	themida
behavioral2/memory/4696-22-0x0000000000400000-0x000000000109A000-memory.dmp	themida
behavioral2/memory/2636-24-0x0000000000400000-0x000000000109A000-memory.dmp	themida
behavioral2/memory/2636-25-0x0000000000400000-0x000000000109A000-memory.dmp	themida

Checks whether UAC is enabled 1 TTPs 2 IoCs

evasion trojan

System Information Discovery

T1082

Processes:

loader.exedefenderx64.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	loader.exe
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	defenderx64.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

Processes:

loader.exedefenderx64.exe

pid process

4696 loader.exe
2636 defenderx64.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
Creates scheduled task(s) 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task/Job
T1053

Processes:

schtasks.exeschtasks.exe

pid process

1248 schtasks.exe
3732 schtasks.exe

pid	process
1248	schtasks.exe
3732	schtasks.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

Processes:

loader.exedefenderx64.exe

pid	process
4696	loader.exe
4696	loader.exe
2636	defenderx64.exe
2636	defenderx64.exe
2636	defenderx64.exe
2636	defenderx64.exe
2636	defenderx64.exe
2636	defenderx64.exe
2636	defenderx64.exe
2636	defenderx64.exe
2636	defenderx64.exe
2636	defenderx64.exe
2636	defenderx64.exe
2636	defenderx64.exe
2636	defenderx64.exe
2636	defenderx64.exe
2636	defenderx64.exe
2636	defenderx64.exe
2636	defenderx64.exe
2636	defenderx64.exe
2636	defenderx64.exe
2636	defenderx64.exe
2636	defenderx64.exe
2636	defenderx64.exe
2636	defenderx64.exe
2636	defenderx64.exe
2636	defenderx64.exe
2636	defenderx64.exe
2636	defenderx64.exe
2636	defenderx64.exe
2636	defenderx64.exe
2636	defenderx64.exe
2636	defenderx64.exe
2636	defenderx64.exe
2636	defenderx64.exe
2636	defenderx64.exe
2636	defenderx64.exe
2636	defenderx64.exe
2636	defenderx64.exe
2636	defenderx64.exe
2636	defenderx64.exe
2636	defenderx64.exe
2636	defenderx64.exe
2636	defenderx64.exe
2636	defenderx64.exe
2636	defenderx64.exe
2636	defenderx64.exe
2636	defenderx64.exe
2636	defenderx64.exe
2636	defenderx64.exe
2636	defenderx64.exe
2636	defenderx64.exe
2636	defenderx64.exe
2636	defenderx64.exe
2636	defenderx64.exe
2636	defenderx64.exe
2636	defenderx64.exe
2636	defenderx64.exe
2636	defenderx64.exe
2636	defenderx64.exe
2636	defenderx64.exe
2636	defenderx64.exe
2636	defenderx64.exe
2636	defenderx64.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

loader.exedefenderx64.exe

description pid process

Token: SeDebugPrivilege 4696 loader.exe
Token: SeDebugPrivilege 2636 defenderx64.exe
Suspicious use of FindShellTrayWindow 3 IoCs

Processes:

defenderx64.exe

pid process

2636 defenderx64.exe
2636 defenderx64.exe
2636 defenderx64.exe
Suspicious use of SendNotifyMessage 3 IoCs

Processes:

defenderx64.exe

pid process

2636 defenderx64.exe
2636 defenderx64.exe
2636 defenderx64.exe

description	pid	process
Token: SeDebugPrivilege	4696	loader.exe
Token: SeDebugPrivilege	2636	defenderx64.exe

pid	process
2636	defenderx64.exe
2636	defenderx64.exe
2636	defenderx64.exe

pid	process
2636	defenderx64.exe
2636	defenderx64.exe
2636	defenderx64.exe

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

loader.exedefenderx64.execmd.exe

description	pid	process	target process
PID 4696 wrote to memory of 1248	4696	loader.exe	schtasks.exe
PID 4696 wrote to memory of 1248	4696	loader.exe	schtasks.exe
PID 4696 wrote to memory of 1248	4696	loader.exe	schtasks.exe
PID 4696 wrote to memory of 2636	4696	loader.exe	defenderx64.exe
PID 4696 wrote to memory of 2636	4696	loader.exe	defenderx64.exe
PID 4696 wrote to memory of 2636	4696	loader.exe	defenderx64.exe
PID 2636 wrote to memory of 3732	2636	defenderx64.exe	schtasks.exe
PID 2636 wrote to memory of 3732	2636	defenderx64.exe	schtasks.exe
PID 2636 wrote to memory of 3732	2636	defenderx64.exe	schtasks.exe
PID 2636 wrote to memory of 4188	2636	defenderx64.exe	cmd.exe
PID 2636 wrote to memory of 4188	2636	defenderx64.exe	cmd.exe
PID 2636 wrote to memory of 4188	2636	defenderx64.exe	cmd.exe
PID 4188 wrote to memory of 1884	4188	cmd.exe	chcp.com
PID 4188 wrote to memory of 1884	4188	cmd.exe	chcp.com
PID 4188 wrote to memory of 1884	4188	cmd.exe	chcp.com

C:\Users\Admin\AppData\Local\Temp\loader.exe
"C:\Users\Admin\AppData\Local\Temp\loader.exe"
1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4696

C:\Windows\SysWOW64\schtasks.exe
"schtasks" /create /tn "Windows Defender Helper" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\en\defenderx64.exe" /rl HIGHEST /f
2⤵
- Creates scheduled task(s)
PID:1248

C:\Users\Admin\AppData\Roaming\en\defenderx64.exe
"C:\Users\Admin\AppData\Roaming\en\defenderx64.exe"
2⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Executes dropped EXE
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:2636

C:\Windows\SysWOW64\schtasks.exe
"schtasks" /create /tn "Windows Defender Helper" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\en\defenderx64.exe" /rl HIGHEST /f
3⤵
- Creates scheduled task(s)
PID:3732

C:\Windows\SysWOW64\cmd.exe
"cmd" /K CHCP 437
3⤵
- Suspicious use of WriteProcessMemory
PID:4188

C:\Windows\SysWOW64\chcp.com
CHCP 437
4⤵
PID:1884

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Scheduled Task/Job

1

T1053

Persistence

Scheduled Task/Job

1

T1053

Privilege Escalation

Scheduled Task/Job

1

T1053

Defense Evasion

Virtualization/Sandbox Evasion

1

T1497

Credential Access

Discovery

Query Registry

2

T1012

Virtualization/Sandbox Evasion

1

T1497

System Information Discovery

3

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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Downloads

C:\Users\Admin\AppData\Roaming\en\defenderx64.exe
Filesize
4.8MB

MD5
a7162b6eabcdb753b8ec85bda90af43c

SHA1
e837aa3e994604f84c3adb4f6a10dc602e326a3e

SHA256
ec5fa919b523ea3effb48a867b496d30a3bbf2208bc5652f812ebd0d87889ad0

SHA512
3aeb0173d2169d9607a9e9e12c6ded9a2e0ab68b3c522ef287d3d5245b8c9eceec903685e30698711678664c6e002f09c224b61eaadd0cd54e1646104da8a4e4

Download Submit
memory/2636-36-0x0000000000400000-0x000000000109A000-memory.dmp

Filesize
12.6MB

Download
memory/2636-33-0x0000000007E00000-0x0000000007E66000-memory.dmp

Filesize
408KB

Download
memory/2636-32-0x0000000007DB0000-0x0000000007DEC000-memory.dmp

Filesize
240KB

Download
memory/2636-31-0x0000000007D90000-0x0000000007DA2000-memory.dmp

Filesize
72KB

Download
memory/2636-28-0x0000000007150000-0x0000000007202000-memory.dmp

Filesize
712KB

Download
memory/2636-27-0x0000000006F60000-0x0000000006FB0000-memory.dmp

Filesize
320KB

Download
memory/2636-26-0x00000000067E0000-0x0000000006DF8000-memory.dmp

Filesize
6.1MB

Download
memory/2636-25-0x0000000000400000-0x000000000109A000-memory.dmp

Filesize
12.6MB

Download
memory/2636-24-0x0000000000400000-0x000000000109A000-memory.dmp

Filesize
12.6MB

Download
memory/2636-21-0x0000000000400000-0x000000000109A000-memory.dmp

Filesize
12.6MB

Download
memory/4696-6-0x0000000074F00000-0x0000000074FF0000-memory.dmp

Filesize
960KB

Download
memory/4696-10-0x0000000000400000-0x000000000109A000-memory.dmp

Filesize
12.6MB

Download
memory/4696-14-0x0000000005700000-0x000000000570A000-memory.dmp

Filesize
40KB

Download
memory/4696-12-0x0000000005750000-0x0000000005CF4000-memory.dmp

Filesize
5.6MB

Download
memory/4696-20-0x0000000074F00000-0x0000000074FF0000-memory.dmp

Filesize
960KB

Download
memory/4696-11-0x0000000000400000-0x000000000109A000-memory.dmp

Filesize
12.6MB

Download
memory/4696-22-0x0000000000400000-0x000000000109A000-memory.dmp

Filesize
12.6MB

Download
memory/4696-13-0x0000000005610000-0x00000000056A2000-memory.dmp

Filesize
584KB

Download
memory/4696-8-0x0000000074F00000-0x0000000074FF0000-memory.dmp

Filesize
960KB

Download
memory/4696-7-0x0000000074F00000-0x0000000074FF0000-memory.dmp

Filesize
960KB

Download
memory/4696-1-0x0000000074F20000-0x0000000074F21000-memory.dmp

Filesize
4KB

Download
memory/4696-5-0x0000000074F00000-0x0000000074FF0000-memory.dmp

Filesize
960KB

Download
memory/4696-4-0x0000000074F00000-0x0000000074FF0000-memory.dmp

Filesize
960KB

Download
memory/4696-2-0x0000000074F00000-0x0000000074FF0000-memory.dmp

Filesize
960KB

Download
memory/4696-3-0x0000000074F00000-0x0000000074FF0000-memory.dmp

Filesize
960KB

Download
memory/4696-0-0x0000000000400000-0x000000000109A000-memory.dmp

Filesize
12.6MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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