quasar | 91317ced2f4f13e3a9e32d85481811ac7ec8a497057f5b103a9d13915df9bd04

Analysis

max time kernel
126s
max time network
142s
platform
windows11-21h2_x64
resource
win11-20241007-en
resource tags

arch:x64arch:x86image:win11-20241007-enlocale:en-usos:windows11-21h2-x64system
submitted
22-01-2025 20:33

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General

Target

PERM.exe
Size

3.1MB
MD5

b0dd954ceb8a6f5f328c999877c8aae8
SHA1

1a312b40a820e819f25ade7cbe633aad104855f3
SHA256

91317ced2f4f13e3a9e32d85481811ac7ec8a497057f5b103a9d13915df9bd04
SHA512

3b2c519990213dbff799849e244650024eb449d37f7124eb0d645cac6619bd3875e27b6446c6016a75fed3bf24e0f3aa252dbddc5a3652e0a3f376097c519fa7
SSDEEP

49152:3vyI22SsaNYfdPBldt698dBcjH4oDkE2Hqk/+FpoGdOTHHB72eh2NT:3vf22SsaNYfdPBldt6+dBcjH4oDXr

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

192.168.1.115:4782

Mutex

0d2a5ea8-389a-4ca3-80ef-f0a24450d17f

Attributes

encryption_key
CEBBCD296E028BCC0E5B98A92D532CD6055F1E6C
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/1352-1-0x00000000007C0000-0x0000000000AE4000-memory.dmp	family_quasar
behavioral1/files/0x001d00000002ab30-6.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2148	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
3548	schtasks.exe
1260	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1352	PERM.exe
Token: SeDebugPrivilege	2148	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2148	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1352 wrote to memory of 3548	1352	PERM.exe	77
PID 1352 wrote to memory of 3548	1352	PERM.exe	77
PID 1352 wrote to memory of 2148	1352	PERM.exe	79
PID 1352 wrote to memory of 2148	1352	PERM.exe	79
PID 2148 wrote to memory of 1260	2148	Client.exe	80
PID 2148 wrote to memory of 1260	2148	Client.exe	80

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\PERM.exe
"C:\Users\Admin\AppData\Local\Temp\PERM.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1352
- 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:3548
- 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:2148
- - 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:1260

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

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Downloads

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

Filesize
3.1MB

MD5
b0dd954ceb8a6f5f328c999877c8aae8

SHA1
1a312b40a820e819f25ade7cbe633aad104855f3

SHA256
91317ced2f4f13e3a9e32d85481811ac7ec8a497057f5b103a9d13915df9bd04

SHA512
3b2c519990213dbff799849e244650024eb449d37f7124eb0d645cac6619bd3875e27b6446c6016a75fed3bf24e0f3aa252dbddc5a3652e0a3f376097c519fa7

Download Submit
memory/1352-0-0x00007FFD38193000-0x00007FFD38195000-memory.dmp

Filesize
8KB

Download
memory/1352-1-0x00000000007C0000-0x0000000000AE4000-memory.dmp

Filesize
3.1MB

Download
memory/1352-2-0x00007FFD38190000-0x00007FFD38C52000-memory.dmp

Filesize
10.8MB

Download
memory/1352-10-0x00007FFD38190000-0x00007FFD38C52000-memory.dmp

Filesize
10.8MB

Download
memory/2148-9-0x00007FFD38190000-0x00007FFD38C52000-memory.dmp

Filesize
10.8MB

Download
memory/2148-11-0x00007FFD38190000-0x00007FFD38C52000-memory.dmp

Filesize
10.8MB

Download
memory/2148-12-0x000000001BFD0000-0x000000001C020000-memory.dmp

Filesize
320KB

Download
memory/2148-13-0x000000001CC70000-0x000000001CD22000-memory.dmp

Filesize
712KB

Download
memory/2148-14-0x00007FFD38190000-0x00007FFD38C52000-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