quasar | 9057d608444db943deadf4f2b4da0b6c9e8bbfcb1efcf451679fa2cf1e7f3a18 | Triage

Analysis

max time kernel
40s
max time network
43s
platform
windows10-ltsc 2021_x64
resource
win10ltsc2021-20241023-en
resource tags

arch:x64arch:x86image:win10ltsc2021-20241023-enlocale:en-usos:windows10-ltsc 2021-x64system
submitted
29/11/2024, 06:12 UTC

Sharing

Report Analysis Logs

General

Target

Installer.exe
Size

3.1MB
MD5

19570d471b4f795bf854b8f8951d28f0
SHA1

9d43a2c713ca6d8d7ecf2b9546b24add96612994
SHA256

9057d608444db943deadf4f2b4da0b6c9e8bbfcb1efcf451679fa2cf1e7f3a18
SHA512

f3f059d81f29f3e3607f9837be54226a5a82f83d64c812b01b6a3200abc3e3a41360a931dfe143c07359df5bb07bcb5dc695882a715ccf635c3ab5a54bb59298
SSDEEP

49152:3vyI22SsaNYfdPBldt698dBcjHAD6eCLogoGdGfTHHB72eh2NT:3vf22SsaNYfdPBldt6+dBcjHAD63W

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

azxq0ap.localto.net:3425

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
behavioral1/memory/3668-1-0x0000000000C70000-0x0000000000F94000-memory.dmp	family_quasar
behavioral1/files/0x0029000000045056-3.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2724	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

pid	Process
3132	schtasks.exe
2332	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3668	Installer.exe
Token: SeDebugPrivilege	2724	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2724	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3668 wrote to memory of 3132	3668	Installer.exe	82
PID 3668 wrote to memory of 3132	3668	Installer.exe	82
PID 3668 wrote to memory of 2724	3668	Installer.exe	84
PID 3668 wrote to memory of 2724	3668	Installer.exe	84
PID 2724 wrote to memory of 2332	2724	Client.exe	85
PID 2724 wrote to memory of 2332	2724	Client.exe	85

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\Installer.exe
"C:\Users\Admin\AppData\Local\Temp\Installer.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3668
- 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:3132
- 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:2724
- - 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:2332

Network

DNS

232.168.11.51.in-addr.arpa

Remote address:

8.8.8.8:53

Request

232.168.11.51.in-addr.arpa

IN PTR

Response
DNS

232.168.11.51.in-addr.arpa

Remote address:

8.8.8.8:53

Request

232.168.11.51.in-addr.arpa

IN PTR
DNS

88.210.23.2.in-addr.arpa

Remote address:

8.8.8.8:53

Request

88.210.23.2.in-addr.arpa

IN PTR

Response

88.210.23.2.in-addr.arpa

IN PTR

a2-23-210-88deploystaticakamaitechnologiescom
DNS

88.210.23.2.in-addr.arpa

Remote address:

8.8.8.8:53

Request

88.210.23.2.in-addr.arpa

IN PTR
DNS

71.159.190.20.in-addr.arpa

Remote address:

8.8.8.8:53

Request

71.159.190.20.in-addr.arpa

IN PTR

Response
DNS

95.221.229.192.in-addr.arpa

Remote address:

8.8.8.8:53

Request

95.221.229.192.in-addr.arpa

IN PTR

Response
DNS

azxq0ap.localto.net

Client.exe

Remote address:

8.8.8.8:53

Request

azxq0ap.localto.net

IN A

Response

azxq0ap.localto.net

IN A

23.158.232.33
DNS

ipwho.is

Client.exe

Remote address:

8.8.8.8:53

Request

ipwho.is

IN A

Response

ipwho.is

IN A

195.201.57.90
GET

https://ipwho.is/

Client.exe

Remote address:

195.201.57.90:443

Request

GET / HTTP/1.1
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:76.0) Gecko/20100101 Firefox/76.0
Host: ipwho.is
Connection: Keep-Alive

Response

HTTP/1.1 200 OK

Date: Fri, 29 Nov 2024 06:12:40 GMT
Content-Type: application/json; charset=utf-8
Transfer-Encoding: chunked
Connection: keep-alive
Server: ipwhois
Access-Control-Allow-Headers: *
X-Robots-Tag: noindex
DNS

33.232.158.23.in-addr.arpa

Remote address:

8.8.8.8:53

Request

33.232.158.23.in-addr.arpa

IN PTR

Response
DNS

90.57.201.195.in-addr.arpa

Remote address:

8.8.8.8:53

Request

90.57.201.195.in-addr.arpa

IN PTR

Response

90.57.201.195.in-addr.arpa

IN PTR

static9057201195clientsyour-serverde
DNS

149.220.183.52.in-addr.arpa

Remote address:

8.8.8.8:53

Request

149.220.183.52.in-addr.arpa

IN PTR

Response
DNS

56.163.245.4.in-addr.arpa

Remote address:

8.8.8.8:53

Request

56.163.245.4.in-addr.arpa

IN PTR

Response
DNS

198.187.3.20.in-addr.arpa

Remote address:

8.8.8.8:53

Request

198.187.3.20.in-addr.arpa

IN PTR

Response

23.158.232.33:3425

azxq0ap.localto.net

tls

Client.exe

91.0kB
5.7kB
94
80
195.201.57.90:443

https://ipwho.is/

tls, http

Client.exe

877 B
6.3kB
9
10

HTTP Request

GET https://ipwho.is/

HTTP Response

200

8.8.8.8:53

232.168.11.51.in-addr.arpa

dns

144 B
158 B
2
1

DNS Request

232.168.11.51.in-addr.arpa

DNS Request

232.168.11.51.in-addr.arpa
8.8.8.8:53

88.210.23.2.in-addr.arpa

dns

140 B
133 B
2
1

DNS Request

88.210.23.2.in-addr.arpa

DNS Request

88.210.23.2.in-addr.arpa
8.8.8.8:53

71.159.190.20.in-addr.arpa

dns

72 B
158 B
1
1

DNS Request

71.159.190.20.in-addr.arpa
8.8.8.8:53

95.221.229.192.in-addr.arpa

dns

73 B
144 B
1
1

DNS Request

95.221.229.192.in-addr.arpa
8.8.8.8:53

azxq0ap.localto.net

dns

Client.exe

65 B
81 B
1
1

DNS Request

azxq0ap.localto.net

DNS Response

23.158.232.33
8.8.8.8:53

ipwho.is

dns

Client.exe

54 B
70 B
1
1

DNS Request

ipwho.is

DNS Response

195.201.57.90
8.8.8.8:53

33.232.158.23.in-addr.arpa

dns

72 B
152 B
1
1

DNS Request

33.232.158.23.in-addr.arpa
8.8.8.8:53

90.57.201.195.in-addr.arpa

dns

72 B
129 B
1
1

DNS Request

90.57.201.195.in-addr.arpa
8.8.8.8:53

149.220.183.52.in-addr.arpa

dns

73 B
147 B
1
1

DNS Request

149.220.183.52.in-addr.arpa
8.8.8.8:53

56.163.245.4.in-addr.arpa

dns

71 B
157 B
1
1

DNS Request

56.163.245.4.in-addr.arpa
8.8.8.8:53

198.187.3.20.in-addr.arpa

dns

71 B
157 B
1
1

DNS Request

198.187.3.20.in-addr.arpa

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

Scheduled Task

Persistence

Scheduled Task/Job

Scheduled Task

Privilege Escalation

Scheduled Task/Job

Scheduled Task

Defense Evasion

Credential Access

Discovery

Query Registry

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
19570d471b4f795bf854b8f8951d28f0

SHA1
9d43a2c713ca6d8d7ecf2b9546b24add96612994

SHA256
9057d608444db943deadf4f2b4da0b6c9e8bbfcb1efcf451679fa2cf1e7f3a18

SHA512
f3f059d81f29f3e3607f9837be54226a5a82f83d64c812b01b6a3200abc3e3a41360a931dfe143c07359df5bb07bcb5dc695882a715ccf635c3ab5a54bb59298

Download Submit
memory/2724-6-0x00007FFA4E070000-0x00007FFA4EB32000-memory.dmp

Filesize
10.8MB

Download
memory/2724-7-0x00007FFA4E070000-0x00007FFA4EB32000-memory.dmp

Filesize
10.8MB

Download
memory/2724-8-0x0000000002E00000-0x0000000002E50000-memory.dmp

Filesize
320KB

Download
memory/2724-9-0x000000001CB30000-0x000000001CBE2000-memory.dmp

Filesize
712KB

Download
memory/2724-12-0x0000000002FF0000-0x0000000003002000-memory.dmp

Filesize
72KB

Download
memory/2724-13-0x000000001BB80000-0x000000001BBBC000-memory.dmp

Filesize
240KB

Download
memory/2724-14-0x00007FFA4E070000-0x00007FFA4EB32000-memory.dmp

Filesize
10.8MB

Download
memory/3668-0-0x00007FFA4E073000-0x00007FFA4E075000-memory.dmp

Filesize
8KB

Download
memory/3668-1-0x0000000000C70000-0x0000000000F94000-memory.dmp

Filesize
3.1MB

Download
memory/3668-2-0x00007FFA4E070000-0x00007FFA4EB32000-memory.dmp

Filesize
10.8MB

Download
memory/3668-5-0x00007FFA4E070000-0x00007FFA4EB32000-memory.dmp

Filesize
10.8MB

Download