quasar | 4531e23ad4f6443dd3e0807007afd811ea1fc6a2a35f423e9ac98bcfc21be996 | Triage

Analysis

max time kernel
125s
max time network
141s
platform
windows10-2004_x64
resource
win10v2004-20250129-en
resource tags

arch:x64arch:x86image:win10v2004-20250129-enlocale:en-usos:windows10-2004-x64system
submitted
03/02/2025, 03:35 UTC

Sharing

Report Analysis Logs

General

Target

0x0008000000015fc4-8.exe
Size

3.1MB
MD5

026407873fa1c229033246e574724e02
SHA1

888c874808635b0b03456da413b1941c61c33686
SHA256

4531e23ad4f6443dd3e0807007afd811ea1fc6a2a35f423e9ac98bcfc21be996
SHA512

660db81f331c9ff47440d41d2e5062d92ad1fe2b7cc5559ba120c4908b5cd9a253c4fb1da323a1f0f1e7a5ce50d04e9020aec286e3eb399cb3ebdf1b765acc7f
SSDEEP

49152:vvChBYjCO4Dt2d5aKCuVPzlEmVQL0wvwkaw2RJ6sbR3LoGdOiTHHB72eh2NT:vv8t2d5aKCuVPzlEmVQ0wvwfw2RJ62

Score

10^/10

quasar svchost 2 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

svchost 2

C2

41.216.183.179:3742

Mutex

d018acac-011d-4ca3-b0c3-4fdd7ec2d6d1

Attributes

encryption_key
0325CE0E85B5B8870BB69FE8C81088DBCBFAC6F7
install_name
Host Process for Windows Tasks.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Host Process for Windows Tasks
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
behavioral2/memory/404-1-0x0000000000FD0000-0x00000000012F4000-memory.dmp	family_quasar
behavioral2/files/0x000c000000023b0d-6.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
3928	Host Process for Windows Tasks.exe

Drops file in System32 directory 5 IoCs

description	ioc	Process
File opened for modification	C:\Windows\system32\SubDir\Host Process for Windows Tasks.exe	0x0008000000015fc4-8.exe
File opened for modification	C:\Windows\system32\SubDir	0x0008000000015fc4-8.exe
File opened for modification	C:\Windows\system32\SubDir\Host Process for Windows Tasks.exe	Host Process for Windows Tasks.exe
File opened for modification	C:\Windows\system32\SubDir	Host Process for Windows Tasks.exe
File created	C:\Windows\system32\SubDir\Host Process for Windows Tasks.exe	0x0008000000015fc4-8.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
2912	schtasks.exe
3408	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	404	0x0008000000015fc4-8.exe
Token: SeDebugPrivilege	3928	Host Process for Windows Tasks.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3928	Host Process for Windows Tasks.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 404 wrote to memory of 2912	404	0x0008000000015fc4-8.exe	86
PID 404 wrote to memory of 2912	404	0x0008000000015fc4-8.exe	86
PID 404 wrote to memory of 3928	404	0x0008000000015fc4-8.exe	88
PID 404 wrote to memory of 3928	404	0x0008000000015fc4-8.exe	88
PID 3928 wrote to memory of 3408	3928	Host Process for Windows Tasks.exe	90
PID 3928 wrote to memory of 3408	3928	Host Process for Windows Tasks.exe	90

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\0x0008000000015fc4-8.exe
"C:\Users\Admin\AppData\Local\Temp\0x0008000000015fc4-8.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:404
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "Host Process for Windows Tasks" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Host Process for Windows Tasks.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2912
- C:\Windows\system32\SubDir\Host Process for Windows Tasks.exe
  "C:\Windows\system32\SubDir\Host Process for Windows Tasks.exe"
  2⤵
  - Executes dropped EXE
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3928
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "Host Process for Windows Tasks" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Host Process for Windows Tasks.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:3408

Network

DNS

130.159.190.20.in-addr.arpa

Remote address:

8.8.8.8:53

Request

130.159.190.20.in-addr.arpa

IN PTR

Response
DNS

172.214.232.199.in-addr.arpa

Remote address:

8.8.8.8:53

Request

172.214.232.199.in-addr.arpa

IN PTR

Response
DNS

43.58.199.20.in-addr.arpa

Remote address:

8.8.8.8:53

Request

43.58.199.20.in-addr.arpa

IN PTR

Response
GET

https://www.bing.com/th?id=OADD2.10239359720591_10PHTLBML42K6TRZO&pid=21.2&c=16&roil=0&roit=0&roir=1&roib=1&w=24&h=24&dynsize=1&qlt=90

Remote address:

95.101.143.219:443

Request

GET /th?id=OADD2.10239359720591_10PHTLBML42K6TRZO&pid=21.2&c=16&roil=0&roit=0&roir=1&roib=1&w=24&h=24&dynsize=1&qlt=90 HTTP/2.0
host: www.bing.com
accept: */*
accept-encoding: gzip, deflate, br
user-agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.102 Safari/537.36 Edge/18.19041

Response

HTTP/2.0 200

cache-control: public, max-age=2592000
content-type: image/png
access-control-allow-origin: *
access-control-allow-headers: *
access-control-allow-methods: GET, POST, OPTIONS
timing-allow-origin: *
report-to: {"group":"network-errors","max_age":604800,"endpoints":[{"url":"https://aefd.nelreports.net/api/report?cat=bingth&ndcParam=QWthbWFp"}]}
nel: {"report_to":"network-errors","max_age":604800,"success_fraction":0.001,"failure_fraction":1.0}
content-length: 1107
date: Mon, 03 Feb 2025 03:35:12 GMT
alt-svc: h3=":443"; ma=93600
x-cdn-traceid: 0.d78f655f.1738553712.10a43d3
DNS

219.143.101.95.in-addr.arpa

Remote address:

8.8.8.8:53

Request

219.143.101.95.in-addr.arpa

IN PTR

Response

219.143.101.95.in-addr.arpa

IN PTR

a95-101-143-219deploystaticakamaitechnologiescom
DNS

197.87.175.4.in-addr.arpa

Remote address:

8.8.8.8:53

Request

197.87.175.4.in-addr.arpa

IN PTR

Response
DNS

241.42.69.40.in-addr.arpa

Remote address:

8.8.8.8:53

Request

241.42.69.40.in-addr.arpa

IN PTR

Response
DNS

13.153.16.2.in-addr.arpa

Remote address:

8.8.8.8:53

Request

13.153.16.2.in-addr.arpa

IN PTR

Response

13.153.16.2.in-addr.arpa

IN PTR

a2-16-153-13deploystaticakamaitechnologiescom

41.216.183.179:3742

Host Process for Windows Tasks.exe

260 B
5
95.101.143.219:443

https://www.bing.com/th?id=OADD2.10239359720591_10PHTLBML42K6TRZO&pid=21.2&c=16&roil=0&roit=0&roir=1&roib=1&w=24&h=24&dynsize=1&qlt=90

tls, http2

1.5kB
6.4kB
17
14

HTTP Request

GET https://www.bing.com/th?id=OADD2.10239359720591_10PHTLBML42K6TRZO&pid=21.2&c=16&roil=0&roit=0&roir=1&roib=1&w=24&h=24&dynsize=1&qlt=90

HTTP Response

200
41.216.183.179:3742

Host Process for Windows Tasks.exe

260 B
5
41.216.183.179:3742

Host Process for Windows Tasks.exe

260 B
5
41.216.183.179:3742

Host Process for Windows Tasks.exe

260 B
5
41.216.183.179:3742

Host Process for Windows Tasks.exe

260 B
5
41.216.183.179:3742

Host Process for Windows Tasks.exe

260 B
5

8.8.8.8:53

130.159.190.20.in-addr.arpa

dns

73 B
159 B
1
1

DNS Request

130.159.190.20.in-addr.arpa
8.8.8.8:53

172.214.232.199.in-addr.arpa

dns

74 B
128 B
1
1

DNS Request

172.214.232.199.in-addr.arpa
8.8.8.8:53

43.58.199.20.in-addr.arpa

dns

71 B
157 B
1
1

DNS Request

43.58.199.20.in-addr.arpa
8.8.8.8:53

219.143.101.95.in-addr.arpa

dns

73 B
139 B
1
1

DNS Request

219.143.101.95.in-addr.arpa
8.8.8.8:53

197.87.175.4.in-addr.arpa

dns

71 B
157 B
1
1

DNS Request

197.87.175.4.in-addr.arpa
8.8.8.8:53

241.42.69.40.in-addr.arpa

dns

71 B
145 B
1
1

DNS Request

241.42.69.40.in-addr.arpa
8.8.8.8:53

13.153.16.2.in-addr.arpa

dns

70 B
133 B
1
1

DNS Request

13.153.16.2.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:\Windows\System32\SubDir\Host Process for Windows Tasks.exe

Filesize
3.1MB

MD5
026407873fa1c229033246e574724e02

SHA1
888c874808635b0b03456da413b1941c61c33686

SHA256
4531e23ad4f6443dd3e0807007afd811ea1fc6a2a35f423e9ac98bcfc21be996

SHA512
660db81f331c9ff47440d41d2e5062d92ad1fe2b7cc5559ba120c4908b5cd9a253c4fb1da323a1f0f1e7a5ce50d04e9020aec286e3eb399cb3ebdf1b765acc7f

Download Submit
memory/404-0-0x00007FF8AE1D3000-0x00007FF8AE1D5000-memory.dmp

Filesize
8KB

Download
memory/404-1-0x0000000000FD0000-0x00000000012F4000-memory.dmp

Filesize
3.1MB

Download
memory/404-2-0x00007FF8AE1D0000-0x00007FF8AEC91000-memory.dmp

Filesize
10.8MB

Download
memory/404-9-0x00007FF8AE1D0000-0x00007FF8AEC91000-memory.dmp

Filesize
10.8MB

Download
memory/3928-10-0x00007FF8AE1D0000-0x00007FF8AEC91000-memory.dmp

Filesize
10.8MB

Download
memory/3928-11-0x00007FF8AE1D0000-0x00007FF8AEC91000-memory.dmp

Filesize
10.8MB

Download
memory/3928-12-0x000000001B4F0000-0x000000001B540000-memory.dmp

Filesize
320KB

Download
memory/3928-13-0x000000001BC30000-0x000000001BCE2000-memory.dmp

Filesize
712KB

Download
memory/3928-14-0x00007FF8AE1D0000-0x00007FF8AEC91000-memory.dmp

Filesize
10.8MB

Download