quasar | 70da41b661dc8de4e8cd1bde0f17f434433115bffad2fb762205b734acd4ed35

General

Target

9860743c4ff83784de05aa8444594aed.exe
Size

14KB
MD5

9860743c4ff83784de05aa8444594aed
SHA1

517ab424f9f6ee8de223e396691f1cb3b2d01a09
SHA256

70da41b661dc8de4e8cd1bde0f17f434433115bffad2fb762205b734acd4ed35
SHA512

cae8c9f056f7556d30e170caca7b4146baf00eaa32b6d2fac8659d2547d97e1461ee8cce0b123db02d5497faf9e12057d5daa530b4b8e722d73c66e769064b88

Score

10^/10

quasar helper spyware suricata trojan

Malware Config

Extracted

Family

quasar

Version

1.4.0

Botnet

helper

C2

41.79.11.214:61032

Mutex

307d89ac-968f-48de-a3b3-0c81d2cf4d4a

Attributes

encryption_key
0D0F7891BD61AE0C503175723ADA783C9973F3B8
install_name
DllHelper.exe
log_directory
Logs
reconnect_delay
5000
startup_key
DllHelper
subdirectory
DllHelper

Signatures

Quasar Payload 5 IoCs

Processes:

resource	yara_rule
\Users\Admin\AppData\Local\Temp\tbdtasya.exe	family_quasar
C:\Users\Admin\AppData\Local\Temp\tbdtasya.exe	family_quasar
C:\Users\Admin\AppData\Local\Temp\tbdtasya.exe	family_quasar
C:\Users\Admin\AppData\Roaming\DllHelper\DllHelper.exe	family_quasar
C:\Users\Admin\AppData\Roaming\DllHelper\DllHelper.exe	family_quasar

Quasar RAT
Quasar is an open source Remote Access Tool.
trojan spyware quasar
suricata: ET MALWARE Observed Malicious SSL Cert (Quasar CnC)
suricata: ET MALWARE Observed Malicious SSL Cert (Quasar CnC)
suricata
Downloads MZ/PE file
Executes dropped EXE 2 IoCs

Processes:

tbdtasya.exeDllHelper.exe

pid process

1032 tbdtasya.exe
1692 DllHelper.exe

pid	process
1032	tbdtasya.exe
1692	DllHelper.exe

Drops startup file 2 IoCs

Processes:

9860743c4ff83784de05aa8444594aed.exe

description	ioc	process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\wmic.exe	9860743c4ff83784de05aa8444594aed.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\wmic.exe	9860743c4ff83784de05aa8444594aed.exe

Loads dropped DLL 1 IoCs

Processes:

9860743c4ff83784de05aa8444594aed.exe

pid process

240 9860743c4ff83784de05aa8444594aed.exe
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
T1053

Processes:

schtasks.exeschtasks.exe

pid process

1800 schtasks.exe
1892 schtasks.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

tbdtasya.exeDllHelper.exe

description pid process

Token: SeDebugPrivilege 1032 tbdtasya.exe
Token: SeDebugPrivilege 1692 DllHelper.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

DllHelper.exe

pid process

1692 DllHelper.exe

pid	process
240	9860743c4ff83784de05aa8444594aed.exe

pid	process
1800	schtasks.exe
1892	schtasks.exe

description	pid	process
Token: SeDebugPrivilege	1032	tbdtasya.exe
Token: SeDebugPrivilege	1692	DllHelper.exe

pid	process
1692	DllHelper.exe

Suspicious use of WriteProcessMemory 13 IoCs

Processes:

9860743c4ff83784de05aa8444594aed.exetbdtasya.exeDllHelper.exe

description	pid	process	target process
PID 240 wrote to memory of 1032	240	9860743c4ff83784de05aa8444594aed.exe	tbdtasya.exe
PID 240 wrote to memory of 1032	240	9860743c4ff83784de05aa8444594aed.exe	tbdtasya.exe
PID 240 wrote to memory of 1032	240	9860743c4ff83784de05aa8444594aed.exe	tbdtasya.exe
PID 240 wrote to memory of 1032	240	9860743c4ff83784de05aa8444594aed.exe	tbdtasya.exe
PID 1032 wrote to memory of 1800	1032	tbdtasya.exe	schtasks.exe
PID 1032 wrote to memory of 1800	1032	tbdtasya.exe	schtasks.exe
PID 1032 wrote to memory of 1800	1032	tbdtasya.exe	schtasks.exe
PID 1032 wrote to memory of 1692	1032	tbdtasya.exe	DllHelper.exe
PID 1032 wrote to memory of 1692	1032	tbdtasya.exe	DllHelper.exe
PID 1032 wrote to memory of 1692	1032	tbdtasya.exe	DllHelper.exe
PID 1692 wrote to memory of 1892	1692	DllHelper.exe	schtasks.exe
PID 1692 wrote to memory of 1892	1692	DllHelper.exe	schtasks.exe
PID 1692 wrote to memory of 1892	1692	DllHelper.exe	schtasks.exe

C:\Users\Admin\AppData\Local\Temp\9860743c4ff83784de05aa8444594aed.exe
"C:\Users\Admin\AppData\Local\Temp\9860743c4ff83784de05aa8444594aed.exe"
1⤵
- Drops startup file
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:240

C:\Users\Admin\AppData\Local\Temp\tbdtasya.exe
C:\Users\Admin\AppData\Local\Temp\tbdtasya.exe
2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1032

C:\Windows\system32\schtasks.exe
"schtasks" /create /tn "DllHelper" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\tbdtasya.exe" /rl HIGHEST /f
3⤵
- Creates scheduled task(s)
PID:1800

C:\Users\Admin\AppData\Roaming\DllHelper\DllHelper.exe
"C:\Users\Admin\AppData\Roaming\DllHelper\DllHelper.exe"
3⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1692

C:\Windows\system32\schtasks.exe
"schtasks" /create /tn "DllHelper" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\DllHelper\DllHelper.exe" /rl HIGHEST /f
4⤵
- Creates scheduled task(s)
PID:1892

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Credential Access

Discovery

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tbdtasya.exe
MD5
0b1906293450341a4fc2d4cd2d4f1b48

SHA1
0f9a4604fb09b2262c8a99653e856ed71dbdc054

SHA256
3c70bee98b3b7ec593a986787ad60f4ad8c1161e48986d3ed254886fbadc55d5

SHA512
cd21a212f6f2c31b4b0fb42a1c739376ccbe607e2af639635b1889f37e8a7e916c6e197aa33cc15a62ddc33bd2091462f98ea1c4e9a3af77a759b9cff1ac6aca

Download Submit
C:\Users\Admin\AppData\Local\Temp\tbdtasya.exe
MD5
0b1906293450341a4fc2d4cd2d4f1b48

SHA1
0f9a4604fb09b2262c8a99653e856ed71dbdc054

SHA256
3c70bee98b3b7ec593a986787ad60f4ad8c1161e48986d3ed254886fbadc55d5

SHA512
cd21a212f6f2c31b4b0fb42a1c739376ccbe607e2af639635b1889f37e8a7e916c6e197aa33cc15a62ddc33bd2091462f98ea1c4e9a3af77a759b9cff1ac6aca

Download Submit
C:\Users\Admin\AppData\Roaming\DllHelper\DllHelper.exe
MD5
0b1906293450341a4fc2d4cd2d4f1b48

SHA1
0f9a4604fb09b2262c8a99653e856ed71dbdc054

SHA256
3c70bee98b3b7ec593a986787ad60f4ad8c1161e48986d3ed254886fbadc55d5

SHA512
cd21a212f6f2c31b4b0fb42a1c739376ccbe607e2af639635b1889f37e8a7e916c6e197aa33cc15a62ddc33bd2091462f98ea1c4e9a3af77a759b9cff1ac6aca

Download Submit
C:\Users\Admin\AppData\Roaming\DllHelper\DllHelper.exe
MD5
0b1906293450341a4fc2d4cd2d4f1b48

SHA1
0f9a4604fb09b2262c8a99653e856ed71dbdc054

SHA256
3c70bee98b3b7ec593a986787ad60f4ad8c1161e48986d3ed254886fbadc55d5

SHA512
cd21a212f6f2c31b4b0fb42a1c739376ccbe607e2af639635b1889f37e8a7e916c6e197aa33cc15a62ddc33bd2091462f98ea1c4e9a3af77a759b9cff1ac6aca

Download Submit
\Users\Admin\AppData\Local\Temp\tbdtasya.exe
MD5
0b1906293450341a4fc2d4cd2d4f1b48

SHA1
0f9a4604fb09b2262c8a99653e856ed71dbdc054

SHA256
3c70bee98b3b7ec593a986787ad60f4ad8c1161e48986d3ed254886fbadc55d5

SHA512
cd21a212f6f2c31b4b0fb42a1c739376ccbe607e2af639635b1889f37e8a7e916c6e197aa33cc15a62ddc33bd2091462f98ea1c4e9a3af77a759b9cff1ac6aca

Download Submit
memory/240-54-0x00000000755A1000-0x00000000755A3000-memory.dmp

Filesize
8KB

Download
memory/1032-56-0x0000000000000000-mapping.dmp

Download
memory/1032-59-0x00000000003C0000-0x00000000003C1000-memory.dmp

Filesize
4KB

Download
memory/1032-61-0x000000001AE80000-0x000000001AE82000-memory.dmp

Filesize
8KB

Download
memory/1692-63-0x0000000000000000-mapping.dmp

Download
memory/1692-66-0x0000000001380000-0x0000000001381000-memory.dmp

Filesize
4KB

Download
memory/1692-68-0x000000001AEA0000-0x000000001AEA2000-memory.dmp

Filesize
8KB

Download
memory/1800-62-0x0000000000000000-mapping.dmp

Download
memory/1892-69-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads