quasar | 5f8cd02b16b38230d9bef9d35052838ab3fd8e67bf2cfc82c89cd62d8eb9fca6

Analysis

max time kernel
133s
max time network
143s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
16-01-2025 00:35

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General

Target

222.exe
Size

3.1MB
MD5

12f79c4859c66ba550b2b0a23421209c
SHA1

c9105f035bde2e0ff30df75b2be4b82f2c891a07
SHA256

5f8cd02b16b38230d9bef9d35052838ab3fd8e67bf2cfc82c89cd62d8eb9fca6
SHA512

810274c5bebdb31dcde9189b4d2874623ae1c82c457b7c3aa0f11d6718fb70568dba6ef0de4cac3e670596fb75179f822f4865113570710368880e221f84472c
SSDEEP

49152:Dvhuf2NUaNmwzPWlvdaKM7ZxTwLp+zYBxw/oGdyqTHHB72eh2NT:Dv8f2NUaNmwzPWlvdaB7ZxTwQzT

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

10.0.0.85:4782

172.16.0.2:4782

192.168.56.1:4782

Mutex

70b15695-83fa-49d5-9ab7-d6837c0bfe04

Attributes

encryption_key
CE951E8DBE6E2FB19D206CC546AB1C2DB4750281
install_name
Client.exe
log_directory
Logs
reconnect_delay
1
startup_key
Solara
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/944-1-0x0000000000990000-0x0000000000CB4000-memory.dmp	family_quasar
behavioral1/files/0x0009000000016c95-6.dat	family_quasar
behavioral1/memory/2336-10-0x0000000000800000-0x0000000000B24000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2336	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
2056	schtasks.exe
2192	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	944	222.exe
Token: SeDebugPrivilege	2336	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2336	Client.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 944 wrote to memory of 2056	944	222.exe	31
PID 944 wrote to memory of 2056	944	222.exe	31
PID 944 wrote to memory of 2056	944	222.exe	31
PID 944 wrote to memory of 2336	944	222.exe	33
PID 944 wrote to memory of 2336	944	222.exe	33
PID 944 wrote to memory of 2336	944	222.exe	33
PID 2336 wrote to memory of 2192	2336	Client.exe	34
PID 2336 wrote to memory of 2192	2336	Client.exe	34
PID 2336 wrote to memory of 2192	2336	Client.exe	34

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\222.exe
"C:\Users\Admin\AppData\Local\Temp\222.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:944
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "Solara" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2056
- 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:2336
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn "Solara" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2192

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
12f79c4859c66ba550b2b0a23421209c

SHA1
c9105f035bde2e0ff30df75b2be4b82f2c891a07

SHA256
5f8cd02b16b38230d9bef9d35052838ab3fd8e67bf2cfc82c89cd62d8eb9fca6

SHA512
810274c5bebdb31dcde9189b4d2874623ae1c82c457b7c3aa0f11d6718fb70568dba6ef0de4cac3e670596fb75179f822f4865113570710368880e221f84472c

Download Submit
memory/944-0-0x000007FEF53C3000-0x000007FEF53C4000-memory.dmp

Filesize
4KB

Download
memory/944-1-0x0000000000990000-0x0000000000CB4000-memory.dmp

Filesize
3.1MB

Download
memory/944-2-0x000007FEF53C0000-0x000007FEF5DAC000-memory.dmp

Filesize
9.9MB

Download
memory/944-9-0x000007FEF53C0000-0x000007FEF5DAC000-memory.dmp

Filesize
9.9MB

Download
memory/2336-8-0x000007FEF53C0000-0x000007FEF5DAC000-memory.dmp

Filesize
9.9MB

Download
memory/2336-10-0x0000000000800000-0x0000000000B24000-memory.dmp

Filesize
3.1MB

Download
memory/2336-11-0x000007FEF53C0000-0x000007FEF5DAC000-memory.dmp

Filesize
9.9MB

Download
memory/2336-12-0x000007FEF53C0000-0x000007FEF5DAC000-memory.dmp

Filesize
9.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads