quasar | 516e463e2ea077d24cf12f4e3d8a886b99948497cb2eb1fe9a73ca0d61eea32e

General

Target

516e463e2ea077d24cf12f4e3d8a886b99948497cb2eb1fe9a73ca0d61eea32e.exe
Size

3.4MB
MD5

9a1361570008e75a9a8c6c93b8ea9a68
SHA1

66852a8ff188d2003cb0a5c5b3b6d7659719c18c
SHA256

516e463e2ea077d24cf12f4e3d8a886b99948497cb2eb1fe9a73ca0d61eea32e
SHA512

88c39ba29172e236eaa32c1ac531975dc952d36556b7f3d3eb2faa3c9ffe0a39f7f3e4b2a1ae22664f86df41fddef5046d9ded2b522bd9848e5aaa58170889d5
SSDEEP

49152:GvblL26AaNeWgPhlmVqvMQ7XSKidzYAfqoGd7THHB72eh2NT:GvBL26AaNeWgPhlmVqkQ7XSK4zYAy

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

70.34.210.80:4782

192.168.1.203:4782

Mutex

0d965223-b478-41be-af32-ad5a13d78eba

Attributes

encryption_key
EBD92C218F947CFB9F2E27885F8DFFEAE9079F05
install_name
MSWinpreference.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Skype
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/2684-1-0x00000000012E0000-0x0000000001646000-memory.dmp	family_quasar
behavioral1/files/0x0008000000015d07-6.dat	family_quasar
behavioral1/memory/2344-10-0x00000000010E0000-0x0000000001446000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2344	MSWinpreference.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
2832	schtasks.exe
2868	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2684	516e463e2ea077d24cf12f4e3d8a886b99948497cb2eb1fe9a73ca0d61eea32e.exe
Token: SeDebugPrivilege	2344	MSWinpreference.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2344	MSWinpreference.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2684 wrote to memory of 2832	2684	516e463e2ea077d24cf12f4e3d8a886b99948497cb2eb1fe9a73ca0d61eea32e.exe	31
PID 2684 wrote to memory of 2832	2684	516e463e2ea077d24cf12f4e3d8a886b99948497cb2eb1fe9a73ca0d61eea32e.exe	31
PID 2684 wrote to memory of 2832	2684	516e463e2ea077d24cf12f4e3d8a886b99948497cb2eb1fe9a73ca0d61eea32e.exe	31
PID 2684 wrote to memory of 2344	2684	516e463e2ea077d24cf12f4e3d8a886b99948497cb2eb1fe9a73ca0d61eea32e.exe	33
PID 2684 wrote to memory of 2344	2684	516e463e2ea077d24cf12f4e3d8a886b99948497cb2eb1fe9a73ca0d61eea32e.exe	33
PID 2684 wrote to memory of 2344	2684	516e463e2ea077d24cf12f4e3d8a886b99948497cb2eb1fe9a73ca0d61eea32e.exe	33
PID 2344 wrote to memory of 2868	2344	MSWinpreference.exe	34
PID 2344 wrote to memory of 2868	2344	MSWinpreference.exe	34
PID 2344 wrote to memory of 2868	2344	MSWinpreference.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\516e463e2ea077d24cf12f4e3d8a886b99948497cb2eb1fe9a73ca0d61eea32e.exe
"C:\Users\Admin\AppData\Local\Temp\516e463e2ea077d24cf12f4e3d8a886b99948497cb2eb1fe9a73ca0d61eea32e.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2684
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "Skype" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\MSWinpreference.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2832
- C:\Users\Admin\AppData\Roaming\SubDir\MSWinpreference.exe
  "C:\Users\Admin\AppData\Roaming\SubDir\MSWinpreference.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2344
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn "Skype" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\MSWinpreference.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2868

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\MSWinpreference.exe

Filesize
3.4MB

MD5
9a1361570008e75a9a8c6c93b8ea9a68

SHA1
66852a8ff188d2003cb0a5c5b3b6d7659719c18c

SHA256
516e463e2ea077d24cf12f4e3d8a886b99948497cb2eb1fe9a73ca0d61eea32e

SHA512
88c39ba29172e236eaa32c1ac531975dc952d36556b7f3d3eb2faa3c9ffe0a39f7f3e4b2a1ae22664f86df41fddef5046d9ded2b522bd9848e5aaa58170889d5

Download Submit
memory/2344-10-0x00000000010E0000-0x0000000001446000-memory.dmp

Filesize
3.4MB

Download
memory/2344-9-0x000007FEF6620000-0x000007FEF700C000-memory.dmp

Filesize
9.9MB

Download
memory/2344-11-0x000007FEF6620000-0x000007FEF700C000-memory.dmp

Filesize
9.9MB

Download
memory/2344-12-0x000007FEF6620000-0x000007FEF700C000-memory.dmp

Filesize
9.9MB

Download
memory/2684-0-0x000007FEF6623000-0x000007FEF6624000-memory.dmp

Filesize
4KB

Download
memory/2684-1-0x00000000012E0000-0x0000000001646000-memory.dmp

Filesize
3.4MB

Download
memory/2684-2-0x000007FEF6620000-0x000007FEF700C000-memory.dmp

Filesize
9.9MB

Download
memory/2684-8-0x000007FEF6620000-0x000007FEF700C000-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