quasar | b1b8ad9032b829e2ac3956ce8f302745802cd2d5ae686c700796e2f2ee81b0f7

Analysis

max time kernel
144s
max time network
148s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
07/11/2024, 05:41

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General

Target

mieldaloco12.exe
Size

3.1MB
MD5

4ae7ab9b981922837aae1c86c7f726a3
SHA1

1783e0788fb2a103d71bc9a05ae2fb85c0d70ee9
SHA256

b1b8ad9032b829e2ac3956ce8f302745802cd2d5ae686c700796e2f2ee81b0f7
SHA512

79c4bf39ae1761414b5f37186c2483a4b8755168824d6e783ea9cab26e7c0118f391b6417c622b65ea3ac3924ae745a6abe4838ca1d87671898ad90ae9a18e58
SSDEEP

49152:Cv+lL26AaNeWgPhlmVqvMQ7XSK6v9y/ZBxOPoGdexMTHHB72eh2NT:CvuL26AaNeWgPhlmVqkQ7XSK64/M2

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

Cristopher11sa-62565.portmap.host:62565

Mutex

e51e2b65-e963-4051-9736-67d57ed46798

Attributes

encryption_key
AEA258EF65BF1786F0F767C0BE2497ECC304C46F
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 2 IoCs

resource	yara_rule
behavioral2/memory/1296-1-0x0000000000560000-0x0000000000884000-memory.dmp	family_quasar
behavioral2/files/0x0007000000023cb4-6.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2264	Client.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
4828	schtasks.exe
4220	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1296	mieldaloco12.exe
Token: SeDebugPrivilege	2264	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2264	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1296 wrote to memory of 4828	1296	mieldaloco12.exe	85
PID 1296 wrote to memory of 4828	1296	mieldaloco12.exe	85
PID 1296 wrote to memory of 2264	1296	mieldaloco12.exe	87
PID 1296 wrote to memory of 2264	1296	mieldaloco12.exe	87
PID 2264 wrote to memory of 4220	2264	Client.exe	88
PID 2264 wrote to memory of 4220	2264	Client.exe	88

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\mieldaloco12.exe
"C:\Users\Admin\AppData\Local\Temp\mieldaloco12.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1296
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:4828
- C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
  "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2264
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:4220

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

Query Registry

T1012

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

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

Filesize
3.1MB

MD5
4ae7ab9b981922837aae1c86c7f726a3

SHA1
1783e0788fb2a103d71bc9a05ae2fb85c0d70ee9

SHA256
b1b8ad9032b829e2ac3956ce8f302745802cd2d5ae686c700796e2f2ee81b0f7

SHA512
79c4bf39ae1761414b5f37186c2483a4b8755168824d6e783ea9cab26e7c0118f391b6417c622b65ea3ac3924ae745a6abe4838ca1d87671898ad90ae9a18e58

Download Submit
memory/1296-0-0x00007FFE30A13000-0x00007FFE30A15000-memory.dmp

Filesize
8KB

Download
memory/1296-1-0x0000000000560000-0x0000000000884000-memory.dmp

Filesize
3.1MB

Download
memory/1296-2-0x00007FFE30A10000-0x00007FFE314D1000-memory.dmp

Filesize
10.8MB

Download
memory/1296-9-0x00007FFE30A10000-0x00007FFE314D1000-memory.dmp

Filesize
10.8MB

Download
memory/2264-10-0x00007FFE30A10000-0x00007FFE314D1000-memory.dmp

Filesize
10.8MB

Download
memory/2264-11-0x00007FFE30A10000-0x00007FFE314D1000-memory.dmp

Filesize
10.8MB

Download
memory/2264-12-0x000000001B450000-0x000000001B4A0000-memory.dmp

Filesize
320KB

Download
memory/2264-13-0x000000001BC80000-0x000000001BD32000-memory.dmp

Filesize
712KB

Download
memory/2264-16-0x000000001BC00000-0x000000001BC12000-memory.dmp

Filesize
72KB

Download
memory/2264-17-0x000000001C380000-0x000000001C3BC000-memory.dmp

Filesize
240KB

Download
memory/2264-18-0x00007FFE30A10000-0x00007FFE314D1000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads