quasar | 3a3a281e6488b98895402f29a3756463f018ca96b4ebfcfee43e6e7d71e1515b

General

Target

3a3a281e6488b98895402f29a3756463f018ca96b4ebfcfee43e6e7d71e1515bN.exe
Size

3.1MB
MD5

ab02937fb8fc8ccce7853d22fe9ff280
SHA1

cf180eba95b42bcf3ff80ed3e2922d7805ec1f72
SHA256

3a3a281e6488b98895402f29a3756463f018ca96b4ebfcfee43e6e7d71e1515b
SHA512

7fd897a2f658181fd68cc036069c20f7a25afb92d07684005085b68d1f7e96dcb84688f0b8132ca0c200c2d0ac698e6a52014a0b8c8ea2bfe4b314c4756ee1b5
SSDEEP

49152:Vvht62XlaSFNWPjljiFa2RoUYIdqWhybRjPLoGddJfTHHB72eh2NT:VvL62XlaSFNWPjljiFXRoUYIdqWhWT

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

192.168.0.17:5555

Mutex

3b1732e2-6a81-44bb-8d99-4472451b1cf3

Attributes

encryption_key
871AD53C1EE1C8F197D53D3E1DCA45CC62B82B8D
install_name
javaconfig.exe
log_directory
Logs
reconnect_delay
3000
startup_key
JavaUpdater
subdirectory
SubDir

Signatures

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

Quasar payload 3 IoCs

resource	yara_rule
behavioral1/memory/2360-1-0x0000000000870000-0x0000000000B96000-memory.dmp	family_quasar
behavioral1/files/0x000900000001678f-6.dat	family_quasar
behavioral1/memory/3008-10-0x0000000000E30000-0x0000000001156000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
3008	javaconfig.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
1904	schtasks.exe
2748	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2360	3a3a281e6488b98895402f29a3756463f018ca96b4ebfcfee43e6e7d71e1515bN.exe
Token: SeDebugPrivilege	3008	javaconfig.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
3008	javaconfig.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
3008	javaconfig.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3008	javaconfig.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2360 wrote to memory of 1904	2360	3a3a281e6488b98895402f29a3756463f018ca96b4ebfcfee43e6e7d71e1515bN.exe	31
PID 2360 wrote to memory of 1904	2360	3a3a281e6488b98895402f29a3756463f018ca96b4ebfcfee43e6e7d71e1515bN.exe	31
PID 2360 wrote to memory of 1904	2360	3a3a281e6488b98895402f29a3756463f018ca96b4ebfcfee43e6e7d71e1515bN.exe	31
PID 2360 wrote to memory of 3008	2360	3a3a281e6488b98895402f29a3756463f018ca96b4ebfcfee43e6e7d71e1515bN.exe	33
PID 2360 wrote to memory of 3008	2360	3a3a281e6488b98895402f29a3756463f018ca96b4ebfcfee43e6e7d71e1515bN.exe	33
PID 2360 wrote to memory of 3008	2360	3a3a281e6488b98895402f29a3756463f018ca96b4ebfcfee43e6e7d71e1515bN.exe	33
PID 3008 wrote to memory of 2748	3008	javaconfig.exe	34
PID 3008 wrote to memory of 2748	3008	javaconfig.exe	34
PID 3008 wrote to memory of 2748	3008	javaconfig.exe	34

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\3a3a281e6488b98895402f29a3756463f018ca96b4ebfcfee43e6e7d71e1515bN.exe
"C:\Users\Admin\AppData\Local\Temp\3a3a281e6488b98895402f29a3756463f018ca96b4ebfcfee43e6e7d71e1515bN.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2360
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "JavaUpdater" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\javaconfig.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:1904
- C:\Users\Admin\AppData\Roaming\SubDir\javaconfig.exe
  "C:\Users\Admin\AppData\Roaming\SubDir\javaconfig.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3008
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn "JavaUpdater" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\javaconfig.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2748

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

Query Registry

1

T1012

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\SubDir\javaconfig.exe

Filesize
3.1MB

MD5
ab02937fb8fc8ccce7853d22fe9ff280

SHA1
cf180eba95b42bcf3ff80ed3e2922d7805ec1f72

SHA256
3a3a281e6488b98895402f29a3756463f018ca96b4ebfcfee43e6e7d71e1515b

SHA512
7fd897a2f658181fd68cc036069c20f7a25afb92d07684005085b68d1f7e96dcb84688f0b8132ca0c200c2d0ac698e6a52014a0b8c8ea2bfe4b314c4756ee1b5

Download Submit
memory/2360-0-0x000007FEF5D03000-0x000007FEF5D04000-memory.dmp

Filesize
4KB

Download
memory/2360-1-0x0000000000870000-0x0000000000B96000-memory.dmp

Filesize
3.1MB

Download
memory/2360-2-0x000007FEF5D00000-0x000007FEF66EC000-memory.dmp

Filesize
9.9MB

Download
memory/2360-8-0x000007FEF5D00000-0x000007FEF66EC000-memory.dmp

Filesize
9.9MB

Download
memory/3008-9-0x000007FEF5D00000-0x000007FEF66EC000-memory.dmp

Filesize
9.9MB

Download
memory/3008-10-0x0000000000E30000-0x0000000001156000-memory.dmp

Filesize
3.1MB

Download
memory/3008-11-0x000007FEF5D00000-0x000007FEF66EC000-memory.dmp

Filesize
9.9MB

Download
memory/3008-12-0x000007FEF5D00000-0x000007FEF66EC000-memory.dmp

Filesize
9.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads