quasar | cef6ff61237797f8e596d28bfe0ae5ad62824b25ba52ae8dce67f3a4e3f59387

General

Target

cef6ff61237797f8e596d28bfe0ae5ad62824b25ba52ae8dce67f3a4e3f59387.exe
Size

4.2MB
MD5

fded29ae5dcb60a312880b86f918ea1f
SHA1

dfa4acc16804ef47ed513c0b77ab75dd3576a8d2
SHA256

cef6ff61237797f8e596d28bfe0ae5ad62824b25ba52ae8dce67f3a4e3f59387
SHA512

f690eb8164eedee159f9f3d39188f0564521155e0850dcaae139da33c514aaf9ea1313264eb991f4472d9c5d2c706d33841d567d0a534e5fda4ca27f9c1b9b11
SSDEEP

24576:DJwau91PHKWGydL38EqXKzr2gduRXFzP5AtTQpFX+m5fi69fffZctAv7vIjOvtXb:9mdj09Mg9wcWRVpuIRM/

Score

10^/10

quasar office04 discovery spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

10.0.2.10:4782

Mutex

5e88c20b-b195-4047-9b1c-7f8d48b72752

Attributes

encryption_key
54E2D6E30589DDFD447DFA1043FAA166C85E85DA
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Quasar Client Startup
subdirectory
SubDir

Signatures

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

Quasar payload 1 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4300-5-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar

Suspicious use of SetThreadContext 1 IoCs

Processes:

cef6ff61237797f8e596d28bfe0ae5ad62824b25ba52ae8dce67f3a4e3f59387.exe

description	pid	Process	procid_target
PID 4032 set thread context of 4300	4032	cef6ff61237797f8e596d28bfe0ae5ad62824b25ba52ae8dce67f3a4e3f59387.exe	83

System Location Discovery: System Language Discovery 1 TTPs 2 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

Processes:

cef6ff61237797f8e596d28bfe0ae5ad62824b25ba52ae8dce67f3a4e3f59387.exeInstallUtil.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cef6ff61237797f8e596d28bfe0ae5ad62824b25ba52ae8dce67f3a4e3f59387.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	InstallUtil.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

InstallUtil.exe

description	pid	Process
Token: SeDebugPrivilege	4300	InstallUtil.exe

Suspicious use of FindShellTrayWindow 1 IoCs

Processes:

InstallUtil.exe

pid	Process
4300	InstallUtil.exe

Suspicious use of SendNotifyMessage 1 IoCs

Processes:

InstallUtil.exe

pid	Process
4300	InstallUtil.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

cef6ff61237797f8e596d28bfe0ae5ad62824b25ba52ae8dce67f3a4e3f59387.exe

description	pid	Process	procid_target
PID 4032 wrote to memory of 4300	4032	cef6ff61237797f8e596d28bfe0ae5ad62824b25ba52ae8dce67f3a4e3f59387.exe	83
PID 4032 wrote to memory of 4300	4032	cef6ff61237797f8e596d28bfe0ae5ad62824b25ba52ae8dce67f3a4e3f59387.exe	83
PID 4032 wrote to memory of 4300	4032	cef6ff61237797f8e596d28bfe0ae5ad62824b25ba52ae8dce67f3a4e3f59387.exe	83
PID 4032 wrote to memory of 4300	4032	cef6ff61237797f8e596d28bfe0ae5ad62824b25ba52ae8dce67f3a4e3f59387.exe	83
PID 4032 wrote to memory of 4300	4032	cef6ff61237797f8e596d28bfe0ae5ad62824b25ba52ae8dce67f3a4e3f59387.exe	83
PID 4032 wrote to memory of 4300	4032	cef6ff61237797f8e596d28bfe0ae5ad62824b25ba52ae8dce67f3a4e3f59387.exe	83
PID 4032 wrote to memory of 4300	4032	cef6ff61237797f8e596d28bfe0ae5ad62824b25ba52ae8dce67f3a4e3f59387.exe	83
PID 4032 wrote to memory of 4300	4032	cef6ff61237797f8e596d28bfe0ae5ad62824b25ba52ae8dce67f3a4e3f59387.exe	83

C:\Users\Admin\AppData\Local\Temp\cef6ff61237797f8e596d28bfe0ae5ad62824b25ba52ae8dce67f3a4e3f59387.exe
"C:\Users\Admin\AppData\Local\Temp\cef6ff61237797f8e596d28bfe0ae5ad62824b25ba52ae8dce67f3a4e3f59387.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4032
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  PID:4300

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

memory/4032-0-0x0000000074EEE000-0x0000000074EEF000-memory.dmp

Filesize
4KB

Download
memory/4032-1-0x0000000000D30000-0x0000000000D3C000-memory.dmp

Filesize
48KB

Download
memory/4032-2-0x0000000005BE0000-0x0000000006184000-memory.dmp

Filesize
5.6MB

Download
memory/4032-3-0x0000000005730000-0x00000000057CC000-memory.dmp

Filesize
624KB

Download
memory/4032-4-0x00000000030D0000-0x00000000030DA000-memory.dmp

Filesize
40KB

Download
memory/4300-5-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/4300-7-0x0000000005310000-0x00000000053A2000-memory.dmp

Filesize
584KB

Download
memory/4300-8-0x0000000074EE0000-0x0000000075690000-memory.dmp

Filesize
7.7MB

Download
memory/4300-9-0x0000000074EE0000-0x0000000075690000-memory.dmp

Filesize
7.7MB

Download
memory/4300-10-0x00000000053C0000-0x00000000053CA000-memory.dmp

Filesize
40KB

Download
memory/4300-11-0x0000000006A70000-0x0000000007088000-memory.dmp

Filesize
6.1MB

Download
memory/4300-12-0x0000000006600000-0x0000000006650000-memory.dmp

Filesize
320KB

Download
memory/4300-13-0x0000000006860000-0x0000000006912000-memory.dmp

Filesize
712KB

Download
memory/4300-14-0x0000000074EE0000-0x0000000075690000-memory.dmp

Filesize
7.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads