quasar | 9f4e2c1064a40a336930a7dca6c9c153c5f0c587f4e18055eabdb5537350afdf

General

Target

MultiTool.exe
Size

349KB
MD5

d0102723a4f0bd219d334c33e6f2bd7d
SHA1

d5b64ca96a7bb98be2f2d5c30b0fa6c2a0f02c80
SHA256

9f4e2c1064a40a336930a7dca6c9c153c5f0c587f4e18055eabdb5537350afdf
SHA512

27d776337fa6e2f800bf8de95a54419cbbbb9f8b2bc0fd0754150715bca47048dae9a8b7a2e830d89ff5d9b89e19b1ccfaacbaac850bf9d1a7f6896480cc1ef8
SSDEEP

6144:KK2J10qdSlEc39HGPj4cgdgcKKwVbrukSrzMinzG0Q:KKFE4cWFKKwBukQz00Q

Score

10^/10

quasar office04 discovery spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.3.0.0

Botnet

Office04

C2

84.247.189.255:4782

Mutex

QSR_MUTEX_FmGPPoFy6YzWX6Vhge

Attributes

encryption_key
GLiOAliiIofkcUlFmJMj
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
winrar
subdirectory
SubDir

Signatures

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

Quasar payload 2 IoCs

resource	yara_rule
behavioral2/memory/2808-1-0x0000000000570000-0x00000000005CE000-memory.dmp	family_quasar
behavioral2/files/0x000a000000023b7b-10.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2312	Client.exe

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
7	ip-api.com

System Location Discovery: System Language Discovery 1 TTPs 4 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	MultiTool.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Client.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.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
4236	schtasks.exe
4328	schtasks.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2312	Client.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2808	MultiTool.exe
Token: SeDebugPrivilege	2312	Client.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2808 wrote to memory of 4236	2808	MultiTool.exe	86
PID 2808 wrote to memory of 4236	2808	MultiTool.exe	86
PID 2808 wrote to memory of 4236	2808	MultiTool.exe	86
PID 2808 wrote to memory of 2312	2808	MultiTool.exe	88
PID 2808 wrote to memory of 2312	2808	MultiTool.exe	88
PID 2808 wrote to memory of 2312	2808	MultiTool.exe	88
PID 2312 wrote to memory of 4328	2312	Client.exe	91
PID 2312 wrote to memory of 4328	2312	Client.exe	91
PID 2312 wrote to memory of 4328	2312	Client.exe	91

C:\Users\Admin\AppData\Local\Temp\MultiTool.exe
"C:\Users\Admin\AppData\Local\Temp\MultiTool.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2808
- C:\Windows\SysWOW64\schtasks.exe
  "schtasks" /create /tn "winrar" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\MultiTool.exe" /rl HIGHEST /f
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:4236
- C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
  "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2312
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks" /create /tn "winrar" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:4328

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
349KB

MD5
d0102723a4f0bd219d334c33e6f2bd7d

SHA1
d5b64ca96a7bb98be2f2d5c30b0fa6c2a0f02c80

SHA256
9f4e2c1064a40a336930a7dca6c9c153c5f0c587f4e18055eabdb5537350afdf

SHA512
27d776337fa6e2f800bf8de95a54419cbbbb9f8b2bc0fd0754150715bca47048dae9a8b7a2e830d89ff5d9b89e19b1ccfaacbaac850bf9d1a7f6896480cc1ef8

Download Submit
memory/2312-16-0x0000000006EF0000-0x0000000006EFA000-memory.dmp

Filesize
40KB

Download
memory/2312-18-0x0000000074810000-0x0000000074FC0000-memory.dmp

Filesize
7.7MB

Download
memory/2312-23-0x0000000074810000-0x0000000074FC0000-memory.dmp

Filesize
7.7MB

Download
memory/2312-21-0x0000000074810000-0x0000000074FC0000-memory.dmp

Filesize
7.7MB

Download
memory/2312-20-0x0000000074810000-0x0000000074FC0000-memory.dmp

Filesize
7.7MB

Download
memory/2312-19-0x0000000074810000-0x0000000074FC0000-memory.dmp

Filesize
7.7MB

Download
memory/2312-13-0x0000000074810000-0x0000000074FC0000-memory.dmp

Filesize
7.7MB

Download
memory/2312-17-0x0000000074810000-0x0000000074FC0000-memory.dmp

Filesize
7.7MB

Download
memory/2312-15-0x0000000074810000-0x0000000074FC0000-memory.dmp

Filesize
7.7MB

Download
memory/2808-2-0x0000000005620000-0x0000000005BC4000-memory.dmp

Filesize
5.6MB

Download
memory/2808-14-0x0000000074810000-0x0000000074FC0000-memory.dmp

Filesize
7.7MB

Download
memory/2808-0-0x000000007481E000-0x000000007481F000-memory.dmp

Filesize
4KB

Download
memory/2808-1-0x0000000000570000-0x00000000005CE000-memory.dmp

Filesize
376KB

Download
memory/2808-7-0x0000000006250000-0x000000000628C000-memory.dmp

Filesize
240KB

Download
memory/2808-6-0x0000000005D10000-0x0000000005D22000-memory.dmp

Filesize
72KB

Download
memory/2808-5-0x0000000004FC0000-0x0000000005026000-memory.dmp

Filesize
408KB

Download
memory/2808-4-0x0000000074810000-0x0000000074FC0000-memory.dmp

Filesize
7.7MB

Download
memory/2808-3-0x0000000005070000-0x0000000005102000-memory.dmp

Filesize
584KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads