quasar | c1be767404a3d71717a54b01ebfa91ebff578dad8dd518a1a49012bcf012738e

Resubmissions

27/07/2024, 17:08

240727-vnrrpszapr 10

24/07/2024, 13:55

240724-q8e67aygrr 10

Analysis

max time kernel
129s
max time network
149s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
27/07/2024, 17:08

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General

Target

6700ee6916de2b466bfba8efd9d0aaa71cf99252d3f95c570c366819a45ab2ce.exe
Size

3.1MB
MD5

e0bd71734fc197f5d445a0220c946718
SHA1

0bf01f37003f8474f7e038a5846a8f3d1231ab4f
SHA256

6700ee6916de2b466bfba8efd9d0aaa71cf99252d3f95c570c366819a45ab2ce
SHA512

f637d2e0a69f6d0228f67c62c1391e2be8c2e8bde13bcfd676f5eba9960464d9f87494fd4aa146b86bfb38c1870e16e8b48dcf0b937805b60e27df14905e1a4f
SSDEEP

49152:P3ye82ipaSmopPZlGPBbLbrJSrMayVgjokdtNTHHB72eh2NT:P3982ipaSmopPZlGPBnbrJSrMayVK

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

45.66.231.154:4782

Mutex

4304b988-116c-4522-ab83-7f9ad875f60f

Attributes

encryption_key
A6B8B9B9B02FC86103A59CE003D7B3B45DAF8550
install_name
svchost.exe
log_directory
svchost
reconnect_delay
3000
startup_key
svchost
subdirectory
svchost

Signatures

Quasar RAT
Quasar is an open source Remote Access Tool.
trojan spyware quasar

Quasar payload 3 IoCs

resource	yara_rule
behavioral31/memory/1916-1-0x0000000000C00000-0x0000000000F24000-memory.dmp	family_quasar
behavioral31/files/0x0009000000016bf7-6.dat	family_quasar
behavioral31/memory/2068-8-0x0000000000160000-0x0000000000484000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2068	svchost.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
1028	schtasks.exe
2916	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1916	6700ee6916de2b466bfba8efd9d0aaa71cf99252d3f95c570c366819a45ab2ce.exe
Token: SeDebugPrivilege	2068	svchost.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2068	svchost.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 1916 wrote to memory of 1028	1916	6700ee6916de2b466bfba8efd9d0aaa71cf99252d3f95c570c366819a45ab2ce.exe	30
PID 1916 wrote to memory of 1028	1916	6700ee6916de2b466bfba8efd9d0aaa71cf99252d3f95c570c366819a45ab2ce.exe	30
PID 1916 wrote to memory of 1028	1916	6700ee6916de2b466bfba8efd9d0aaa71cf99252d3f95c570c366819a45ab2ce.exe	30
PID 1916 wrote to memory of 2068	1916	6700ee6916de2b466bfba8efd9d0aaa71cf99252d3f95c570c366819a45ab2ce.exe	32
PID 1916 wrote to memory of 2068	1916	6700ee6916de2b466bfba8efd9d0aaa71cf99252d3f95c570c366819a45ab2ce.exe	32
PID 1916 wrote to memory of 2068	1916	6700ee6916de2b466bfba8efd9d0aaa71cf99252d3f95c570c366819a45ab2ce.exe	32
PID 2068 wrote to memory of 2916	2068	svchost.exe	33
PID 2068 wrote to memory of 2916	2068	svchost.exe	33
PID 2068 wrote to memory of 2916	2068	svchost.exe	33

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\6700ee6916de2b466bfba8efd9d0aaa71cf99252d3f95c570c366819a45ab2ce.exe
"C:\Users\Admin\AppData\Local\Temp\6700ee6916de2b466bfba8efd9d0aaa71cf99252d3f95c570c366819a45ab2ce.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1916
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "svchost" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\svchost\svchost.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:1028
- C:\Users\Admin\AppData\Roaming\svchost\svchost.exe
  "C:\Users\Admin\AppData\Roaming\svchost\svchost.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2068
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn "svchost" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\svchost\svchost.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2916

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\svchost\svchost.exe

Filesize
3.1MB

MD5
e0bd71734fc197f5d445a0220c946718

SHA1
0bf01f37003f8474f7e038a5846a8f3d1231ab4f

SHA256
6700ee6916de2b466bfba8efd9d0aaa71cf99252d3f95c570c366819a45ab2ce

SHA512
f637d2e0a69f6d0228f67c62c1391e2be8c2e8bde13bcfd676f5eba9960464d9f87494fd4aa146b86bfb38c1870e16e8b48dcf0b937805b60e27df14905e1a4f

Download Submit
memory/1916-0-0x000007FEF5803000-0x000007FEF5804000-memory.dmp

Filesize
4KB

Download
memory/1916-1-0x0000000000C00000-0x0000000000F24000-memory.dmp

Filesize
3.1MB

Download
memory/1916-2-0x000007FEF5800000-0x000007FEF61EC000-memory.dmp

Filesize
9.9MB

Download
memory/1916-11-0x000007FEF5800000-0x000007FEF61EC000-memory.dmp

Filesize
9.9MB

Download
memory/2068-8-0x0000000000160000-0x0000000000484000-memory.dmp

Filesize
3.1MB

Download
memory/2068-9-0x000007FEF5800000-0x000007FEF61EC000-memory.dmp

Filesize
9.9MB

Download
memory/2068-10-0x000007FEF5800000-0x000007FEF61EC000-memory.dmp

Filesize
9.9MB

Download
memory/2068-12-0x000007FEF5800000-0x000007FEF61EC000-memory.dmp

Filesize
9.9MB

Download
memory/2068-13-0x000007FEF5800000-0x000007FEF61EC000-memory.dmp

Filesize
9.9MB

Download

Resubmissions

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads