quasar | cc92d78ae16a55b1f74cf051ae5098e5cee90949202ebf2272573c1cd9e915bf

Analysis

max time kernel
888s
max time network
896s
platform
windows10-ltsc 2021_x64
resource
win10ltsc2021-20250113-de
resource tags

arch:x64arch:x86image:win10ltsc2021-20250113-delocale:de-deos:windows10-ltsc 2021-x64systemwindows
submitted
25-01-2025 17:11

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General

Target

Client-built.exe
Size

3.1MB
MD5

71237ace600401ba52dfea1b658e9edf
SHA1

b437fd48edf8700d0d873f8670c93ec787562d1c
SHA256

cc92d78ae16a55b1f74cf051ae5098e5cee90949202ebf2272573c1cd9e915bf
SHA512

7b560206139607b7f901c5b2126ca0d0e232e32a22b995c79a1df8a645a8ebf3f33e83136a563073b4606b76a80f4e2ba7b4edd41d3353e694120385d72d0efe
SSDEEP

49152:DvnI22SsaNYfdPBldt698dBcjH0WrWqbartOoGdYTHHB72eh2NT:DvI22SsaNYfdPBldt6+dBcjHdiqb

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

192.168.178.56:4782

Mutex

0552115c-2459-453f-980d-c60aebb9957e

Attributes

encryption_key
1DEED326568BA39A5A6D6473414A146E2A7F5724
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
behavioral1/memory/3296-1-0x0000000000BF0000-0x0000000000F14000-memory.dmp	family_quasar
behavioral1/files/0x002800000004612d-3.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2448	Client.exe

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

System Information Discovery
T1082

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3296	Client-built.exe
Token: SeDebugPrivilege	2448	Client.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2448	Client.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
2448	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2448	Client.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 3296 wrote to memory of 2448	3296	Client-built.exe	82
PID 3296 wrote to memory of 2448	3296	Client-built.exe	82

C:\Users\Admin\AppData\Local\Temp\Client-built.exe
"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3296
- 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 FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of SetWindowsHookEx
  PID:2448

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

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
71237ace600401ba52dfea1b658e9edf

SHA1
b437fd48edf8700d0d873f8670c93ec787562d1c

SHA256
cc92d78ae16a55b1f74cf051ae5098e5cee90949202ebf2272573c1cd9e915bf

SHA512
7b560206139607b7f901c5b2126ca0d0e232e32a22b995c79a1df8a645a8ebf3f33e83136a563073b4606b76a80f4e2ba7b4edd41d3353e694120385d72d0efe

Download Submit
memory/2448-6-0x00007FFDFAB70000-0x00007FFDFB632000-memory.dmp

Filesize
10.8MB

Download
memory/2448-7-0x00007FFDFAB70000-0x00007FFDFB632000-memory.dmp

Filesize
10.8MB

Download
memory/2448-8-0x000000001D2A0000-0x000000001D2F0000-memory.dmp

Filesize
320KB

Download
memory/2448-9-0x000000001D3B0000-0x000000001D462000-memory.dmp

Filesize
712KB

Download
memory/2448-10-0x00007FFDFAB70000-0x00007FFDFB632000-memory.dmp

Filesize
10.8MB

Download
memory/3296-0-0x00007FFDFAB73000-0x00007FFDFAB75000-memory.dmp

Filesize
8KB

Download
memory/3296-1-0x0000000000BF0000-0x0000000000F14000-memory.dmp

Filesize
3.1MB

Download
memory/3296-2-0x00007FFDFAB70000-0x00007FFDFB632000-memory.dmp

Filesize
10.8MB

Download
memory/3296-5-0x00007FFDFAB70000-0x00007FFDFB632000-memory.dmp

Filesize
10.8MB

Download