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/428-1-0x0000000000FA0000-0x0000000000FFE000-memory.dmp	family_quasar
behavioral2/files/0x000a000000023b88-10.dat	family_quasar

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000\Control Panel\International\Geo\Nation	Client.exe

Executes dropped EXE 1 IoCs

pid	Process
4980	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
11	ip-api.com

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 8 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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	chcp.com
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.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
856	PING.EXE

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
856	PING.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
3044	schtasks.exe
4616	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	428	MultiTool.exe
Token: SeDebugPrivilege	4980	Client.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 428 wrote to memory of 3044	428	MultiTool.exe	84
PID 428 wrote to memory of 3044	428	MultiTool.exe	84
PID 428 wrote to memory of 3044	428	MultiTool.exe	84
PID 428 wrote to memory of 4980	428	MultiTool.exe	86
PID 428 wrote to memory of 4980	428	MultiTool.exe	86
PID 428 wrote to memory of 4980	428	MultiTool.exe	86
PID 4980 wrote to memory of 4616	4980	Client.exe	87
PID 4980 wrote to memory of 4616	4980	Client.exe	87
PID 4980 wrote to memory of 4616	4980	Client.exe	87
PID 4980 wrote to memory of 4088	4980	Client.exe	105
PID 4980 wrote to memory of 4088	4980	Client.exe	105
PID 4980 wrote to memory of 4088	4980	Client.exe	105
PID 4980 wrote to memory of 4504	4980	Client.exe	107
PID 4980 wrote to memory of 4504	4980	Client.exe	107
PID 4980 wrote to memory of 4504	4980	Client.exe	107
PID 4504 wrote to memory of 2296	4504	cmd.exe	109
PID 4504 wrote to memory of 2296	4504	cmd.exe	109
PID 4504 wrote to memory of 2296	4504	cmd.exe	109
PID 4504 wrote to memory of 856	4504	cmd.exe	110
PID 4504 wrote to memory of 856	4504	cmd.exe	110
PID 4504 wrote to memory of 856	4504	cmd.exe	110

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:428
- 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:3044
- C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
  "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4980
- - 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:4616
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks" /delete /tn "winrar" /f
    3⤵
    - System Location Discovery: System Language Discovery
    PID:4088
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\gU7vbLps2elQ.bat" "
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:4504
  - - C:\Windows\SysWOW64\chcp.com
      chcp 65001
      4⤵
      System Location Discovery: System Language Discovery
      PID:2296
  - - C:\Windows\SysWOW64\PING.EXE
      ping -n 10 localhost
      4⤵
      System Location Discovery: System Language Discovery
      System Network Configuration Discovery: Internet Connection Discovery
      Runs ping.exe
      PID:856

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

Remote System Discovery

1

T1018

System Information Discovery

2

T1082

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

C:\Users\Admin\AppData\Local\Temp\gU7vbLps2elQ.bat

Filesize
262B

MD5
5957003e70ee9b10ffd4226d0d3c3ce8

SHA1
c8f59b750226b6adb6e2134389c8086c5f316a77

SHA256
ff2aec6378cefc38bb5ed07bfc4b651eb09f767000d9a20b7a8ec9291f296b0c

SHA512
82eeccba814d7e210853ca3df798908f30ef10f82f1aab068df31b12048b055397a1da286b17b0003b7041a38df902a63ed53d4eed2d33d29056e68da345db4d

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

Filesize
349KB

MD5
d0102723a4f0bd219d334c33e6f2bd7d

SHA1
d5b64ca96a7bb98be2f2d5c30b0fa6c2a0f02c80

SHA256
9f4e2c1064a40a336930a7dca6c9c153c5f0c587f4e18055eabdb5537350afdf

SHA512
27d776337fa6e2f800bf8de95a54419cbbbb9f8b2bc0fd0754150715bca47048dae9a8b7a2e830d89ff5d9b89e19b1ccfaacbaac850bf9d1a7f6896480cc1ef8

Download Submit
memory/428-4-0x0000000074A90000-0x0000000075240000-memory.dmp

Filesize
7.7MB

Download
memory/428-1-0x0000000000FA0000-0x0000000000FFE000-memory.dmp

Filesize
376KB

Download
memory/428-0-0x0000000074A9E000-0x0000000074A9F000-memory.dmp

Filesize
4KB

Download
memory/428-5-0x0000000005A10000-0x0000000005A76000-memory.dmp

Filesize
408KB

Download
memory/428-6-0x0000000006720000-0x0000000006732000-memory.dmp

Filesize
72KB

Download
memory/428-7-0x0000000006C60000-0x0000000006C9C000-memory.dmp

Filesize
240KB

Download
memory/428-2-0x0000000005F50000-0x00000000064F4000-memory.dmp

Filesize
5.6MB

Download
memory/428-3-0x0000000005AB0000-0x0000000005B42000-memory.dmp

Filesize
584KB

Download
memory/428-14-0x0000000074A90000-0x0000000075240000-memory.dmp

Filesize
7.7MB

Download
memory/4980-13-0x0000000074A90000-0x0000000075240000-memory.dmp

Filesize
7.7MB

Download
memory/4980-16-0x0000000006440000-0x000000000644A000-memory.dmp

Filesize
40KB

Download
memory/4980-17-0x0000000074A90000-0x0000000075240000-memory.dmp

Filesize
7.7MB

Download
memory/4980-15-0x0000000074A90000-0x0000000075240000-memory.dmp

Filesize
7.7MB

Download
memory/4980-23-0x0000000074A90000-0x0000000075240000-memory.dmp

Filesize
7.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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