quasar | 25f2d280e685bf93f437553620a4b4e89d362205af34c22263bcd6bb33386fe3

General

Target

test.exe
Size

348KB
MD5

2f671e7ebc050b4f024988ef32316937
SHA1

73a69d7d9ed1c8a63d626edf59702b470d2d6650
SHA256

25f2d280e685bf93f437553620a4b4e89d362205af34c22263bcd6bb33386fe3
SHA512

86f0a286e39040a86504c306f9587e840d8ea74bfaaaee5105f0689434b4e433ab5c30032077a8e3e7eae697a65ebae3a09001434a31f9ac5863c323d2d7d7be
SSDEEP

3072:hjrN+Jhi1vwWdCqLlpyDcsvPBsPJ+bgCr8a8JLEThlbVBD5JVWt8nwU69r4rUYT1:hHUhIvTCqLyR0LtUbPdv69r4rUYTMm

Score

10^/10

quasar office04 discovery spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.3.0.0

Botnet

Office04

C2

127.0.0.1:4782

Mutex

QSR_MUTEX_n0f6at7YDD5llBKKrq

Attributes

encryption_key
WTfCCpEEZrrjQU0Hwnaj
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
csrss.exe
subdirectory
SubDir

Signatures

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

Quasar payload 1 IoCs

resource	yara_rule
behavioral1/memory/5864-1-0x0000000000040000-0x000000000009E000-memory.dmp	family_quasar

Downloads MZ/PE file 1 IoCs

flow	pid	Process
21	6044	Process not Found

Looks up external IP address via web service 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
4	ip-api.com

System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	test.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	MicrosoftEdgeUpdate.exe

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 1 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
2872	MicrosoftEdgeUpdate.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
4824	schtasks.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	5864	test.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 5864 wrote to memory of 4824	5864	test.exe	86
PID 5864 wrote to memory of 4824	5864	test.exe	86
PID 5864 wrote to memory of 4824	5864	test.exe	86

C:\Users\Admin\AppData\Local\Temp\test.exe
"C:\Users\Admin\AppData\Local\Temp\test.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5864
- C:\Windows\SysWOW64\schtasks.exe
  "schtasks" /create /tn "csrss.exe" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\test.exe" /rl HIGHEST /f
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:4824

C:\Program Files (x86)\Microsoft\EdgeUpdate\MicrosoftEdgeUpdate.exe
"C:\Program Files (x86)\Microsoft\EdgeUpdate\MicrosoftEdgeUpdate.exe" /ping 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-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
1⤵
- System Location Discovery: System Language Discovery
- System Network Configuration Discovery: Internet Connection Discovery
PID:2872

C:\Windows\System32\rundll32.exe
C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
1⤵
PID:2120

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

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

System Network Configuration Discovery

1

T1016

Internet Connection Discovery

1

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/5864-0-0x0000000073A4E000-0x0000000073A4F000-memory.dmp

Filesize
4KB

Download
memory/5864-1-0x0000000000040000-0x000000000009E000-memory.dmp

Filesize
376KB

Download
memory/5864-2-0x0000000004F30000-0x00000000054D6000-memory.dmp

Filesize
5.6MB

Download
memory/5864-3-0x0000000004B10000-0x0000000004BA2000-memory.dmp

Filesize
584KB

Download
memory/5864-4-0x0000000073A40000-0x00000000741F1000-memory.dmp

Filesize
7.7MB

Download
memory/5864-5-0x0000000004BB0000-0x0000000004C16000-memory.dmp

Filesize
408KB

Download
memory/5864-6-0x0000000004F00000-0x0000000004F12000-memory.dmp

Filesize
72KB

Download
memory/5864-7-0x0000000005D00000-0x0000000005D3C000-memory.dmp

Filesize
240KB

Download
memory/5864-8-0x0000000005EA0000-0x0000000005EAA000-memory.dmp

Filesize
40KB

Download
memory/5864-9-0x0000000073A4E000-0x0000000073A4F000-memory.dmp

Filesize
4KB

Download
memory/5864-10-0x0000000073A40000-0x00000000741F1000-memory.dmp

Filesize
7.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads