quasar | 9f4e2c1064a40a336930a7dca6c9c153c5f0c587f4e18055eabdb5537350afdf

Analysis

max time kernel
121s
max time network
123s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
18-01-2025 18:40

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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

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 3 IoCs

resource	yara_rule
behavioral1/memory/3068-1-0x0000000000210000-0x000000000026E000-memory.dmp	family_quasar
behavioral1/files/0x0036000000015f81-4.dat	family_quasar
behavioral1/memory/2796-10-0x00000000011A0000-0x00000000011FE000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2796	Client.exe

Loads dropped DLL 1 IoCs

pid	Process
3068	MultiTool.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
2	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	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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	MultiTool.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.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
352	PING.EXE

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
352	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
2840	schtasks.exe
2616	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3068	MultiTool.exe
Token: SeDebugPrivilege	2796	Client.exe

Suspicious use of WriteProcessMemory 28 IoCs

description	pid	Process	procid_target
PID 3068 wrote to memory of 2840	3068	MultiTool.exe	31
PID 3068 wrote to memory of 2840	3068	MultiTool.exe	31
PID 3068 wrote to memory of 2840	3068	MultiTool.exe	31
PID 3068 wrote to memory of 2840	3068	MultiTool.exe	31
PID 3068 wrote to memory of 2796	3068	MultiTool.exe	33
PID 3068 wrote to memory of 2796	3068	MultiTool.exe	33
PID 3068 wrote to memory of 2796	3068	MultiTool.exe	33
PID 3068 wrote to memory of 2796	3068	MultiTool.exe	33
PID 2796 wrote to memory of 2616	2796	Client.exe	34
PID 2796 wrote to memory of 2616	2796	Client.exe	34
PID 2796 wrote to memory of 2616	2796	Client.exe	34
PID 2796 wrote to memory of 2616	2796	Client.exe	34
PID 2796 wrote to memory of 2900	2796	Client.exe	37
PID 2796 wrote to memory of 2900	2796	Client.exe	37
PID 2796 wrote to memory of 2900	2796	Client.exe	37
PID 2796 wrote to memory of 2900	2796	Client.exe	37
PID 2796 wrote to memory of 288	2796	Client.exe	39
PID 2796 wrote to memory of 288	2796	Client.exe	39
PID 2796 wrote to memory of 288	2796	Client.exe	39
PID 2796 wrote to memory of 288	2796	Client.exe	39
PID 288 wrote to memory of 1504	288	cmd.exe	41
PID 288 wrote to memory of 1504	288	cmd.exe	41
PID 288 wrote to memory of 1504	288	cmd.exe	41
PID 288 wrote to memory of 1504	288	cmd.exe	41
PID 288 wrote to memory of 352	288	cmd.exe	42
PID 288 wrote to memory of 352	288	cmd.exe	42
PID 288 wrote to memory of 352	288	cmd.exe	42
PID 288 wrote to memory of 352	288	cmd.exe	42

C:\Users\Admin\AppData\Local\Temp\MultiTool.exe
"C:\Users\Admin\AppData\Local\Temp\MultiTool.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3068
- 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:2840
- 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 use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2796
- - 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:2616
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks" /delete /tn "winrar" /f
    3⤵
    - System Location Discovery: System Language Discovery
    PID:2900
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c ""C:\Users\Admin\AppData\Local\Temp\iHh0lB6NKWoK.bat" "
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:288
  - - C:\Windows\SysWOW64\chcp.com
      chcp 65001
      4⤵
      System Location Discovery: System Language Discovery
      PID:1504
  - - 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:352

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Credential Access

Discovery

Remote System Discovery

T1018

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

System Network Configuration Discovery

T1016

Internet Connection Discovery

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\iHh0lB6NKWoK.bat

Filesize
262B

MD5
1144e851e574eafccf1c54751f598d94

SHA1
83c66523ab68bea6c20dbe6834ee40e4ee39643e

SHA256
3df08a229b4d2e4cc4e4dde154eb0ac4e7ca867825b14d9a839cd8bcfc02f39b

SHA512
19c6f3195e88c70b2d53eec9f7fa7777d9d3fd9d2a03b112f6af014a42e84732b608a72ef7d3824c29e660955a6e3896d4238fd35feef0cff8ceb1b38a53c8b2

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

Filesize
349KB

MD5
d0102723a4f0bd219d334c33e6f2bd7d

SHA1
d5b64ca96a7bb98be2f2d5c30b0fa6c2a0f02c80

SHA256
9f4e2c1064a40a336930a7dca6c9c153c5f0c587f4e18055eabdb5537350afdf

SHA512
27d776337fa6e2f800bf8de95a54419cbbbb9f8b2bc0fd0754150715bca47048dae9a8b7a2e830d89ff5d9b89e19b1ccfaacbaac850bf9d1a7f6896480cc1ef8

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memory/2796-9-0x0000000074910000-0x0000000074FFE000-memory.dmp

Filesize
6.9MB

Download
memory/2796-12-0x0000000074910000-0x0000000074FFE000-memory.dmp

Filesize
6.9MB

Download
memory/2796-10-0x00000000011A0000-0x00000000011FE000-memory.dmp

Filesize
376KB

Download
memory/2796-13-0x0000000074910000-0x0000000074FFE000-memory.dmp

Filesize
6.9MB

Download
memory/2796-14-0x0000000074910000-0x0000000074FFE000-memory.dmp

Filesize
6.9MB

Download
memory/2796-24-0x0000000074910000-0x0000000074FFE000-memory.dmp

Filesize
6.9MB

Download
memory/3068-0-0x000000007491E000-0x000000007491F000-memory.dmp

Filesize
4KB

Download
memory/3068-1-0x0000000000210000-0x000000000026E000-memory.dmp

Filesize
376KB

Download
memory/3068-2-0x0000000074910000-0x0000000074FFE000-memory.dmp

Filesize
6.9MB

Download
memory/3068-11-0x0000000074910000-0x0000000074FFE000-memory.dmp

Filesize
6.9MB

Download

Analysis

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General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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