quasar | 8168236516ecd464c7c004c1d824ace70932b9dd61c9e238256965c33f059583

Analysis

max time kernel
147s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
18/04/2024, 23:54 UTC

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General

Target

8168236516ecd464c7c004c1d824ace70932b9dd61c9e238256965c33f059583.exe
Size

3.1MB
MD5

c52e8cb313bd0e446cb9607636bbc6ec
SHA1

77d3ca1584e486528e39802449027cd9e8b08b83
SHA256

8168236516ecd464c7c004c1d824ace70932b9dd61c9e238256965c33f059583
SHA512

d8bdbad8a179c74f2479da58af5530782a1683e07ad656b91ee05b0b00daa8008d1e7143b34eae16ef6ef612e1f742832ae9b9167ac2286799075886d1a66a45
SSDEEP

49152:KvWI22SsaNYfdPBldt698dBcjHS5RJ6PbR3LoGdBTHHB72eh2NT:Kv722SsaNYfdPBldt6+dBcjHS5RJ6h

Score

10^/10

quasar victim spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

victim

192.168.56.1:4782

Mutex

f887c652-41ce-4f9e-8a72-52676eb54001

Attributes

encryption_key
194B648FB0D06C59B36705385FF44BFC616F014E
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 payload 2 IoCs

resource	yara_rule
behavioral2/memory/944-0-0x00000000003D0000-0x00000000006F4000-memory.dmp	family_quasar
behavioral2/files/0x00070000000233bc-5.dat	family_quasar

Detects Windows executables referencing non-Windows User-Agents 2 IoCs

resource	yara_rule
behavioral2/memory/944-0-0x00000000003D0000-0x00000000006F4000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral2/files/0x00070000000233bc-5.dat	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA

Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers. 2 IoCs

resource	yara_rule
behavioral2/memory/944-0-0x00000000003D0000-0x00000000006F4000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_References_Browsers
behavioral2/files/0x00070000000233bc-5.dat	INDICATOR_SUSPICIOUS_Binary_References_Browsers

Detects executables containing common artifacts observed in infostealers 2 IoCs

resource	yara_rule
behavioral2/memory/944-0-0x00000000003D0000-0x00000000006F4000-memory.dmp	INDICATOR_SUSPICIOUS_GENInfoStealer
behavioral2/files/0x00070000000233bc-5.dat	INDICATOR_SUSPICIOUS_GENInfoStealer

Executes dropped EXE 1 IoCs

pid	Process
436	Client.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\system32\SubDir\Client.exe	8168236516ecd464c7c004c1d824ace70932b9dd61c9e238256965c33f059583.exe
File opened for modification	C:\Windows\system32\SubDir\Client.exe	8168236516ecd464c7c004c1d824ace70932b9dd61c9e238256965c33f059583.exe

Creates scheduled task(s) 1 TTPs 2 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task/Job

T1053

pid	Process
2128	schtasks.exe
1868	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	944	8168236516ecd464c7c004c1d824ace70932b9dd61c9e238256965c33f059583.exe
Token: SeDebugPrivilege	436	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
436	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 944 wrote to memory of 2128	944	8168236516ecd464c7c004c1d824ace70932b9dd61c9e238256965c33f059583.exe	89
PID 944 wrote to memory of 2128	944	8168236516ecd464c7c004c1d824ace70932b9dd61c9e238256965c33f059583.exe	89
PID 944 wrote to memory of 436	944	8168236516ecd464c7c004c1d824ace70932b9dd61c9e238256965c33f059583.exe	91
PID 944 wrote to memory of 436	944	8168236516ecd464c7c004c1d824ace70932b9dd61c9e238256965c33f059583.exe	91
PID 436 wrote to memory of 1868	436	Client.exe	93
PID 436 wrote to memory of 1868	436	Client.exe	93

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\8168236516ecd464c7c004c1d824ace70932b9dd61c9e238256965c33f059583.exe
"C:\Users\Admin\AppData\Local\Temp\8168236516ecd464c7c004c1d824ace70932b9dd61c9e238256965c33f059583.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:944
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Client.exe" /rl HIGHEST /f
  2⤵
  - Creates scheduled task(s)
  PID:2128
- C:\Windows\system32\SubDir\Client.exe
  "C:\Windows\system32\SubDir\Client.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:436
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Creates scheduled task(s)
    PID:1868

Network

DNS

71.31.126.40.in-addr.arpa

Remote address:

8.8.8.8:53

Request

71.31.126.40.in-addr.arpa

IN PTR

Response
DNS

g.bing.com

Remote address:

8.8.8.8:53

Request

g.bing.com

IN A

Response

g.bing.com

IN CNAME

g-bing-com.dual-a-0034.a-msedge.net

g-bing-com.dual-a-0034.a-msedge.net

IN CNAME

dual-a-0034.a-msedge.net

dual-a-0034.a-msedge.net

IN A

204.79.197.237

dual-a-0034.a-msedge.net

IN A

13.107.21.237
DNS

g.bing.com

Remote address:

8.8.8.8:53

Request

g.bing.com

IN A
DNS

g.bing.com

Remote address:

8.8.8.8:53

Request

g.bing.com

IN A
DNS

241.154.82.20.in-addr.arpa

Remote address:

8.8.8.8:53

Request

241.154.82.20.in-addr.arpa

IN PTR

Response
DNS

241.154.82.20.in-addr.arpa

Remote address:

8.8.8.8:53

Request

241.154.82.20.in-addr.arpa

IN PTR
GET

https://g.bing.com/neg/0?action=emptycreativeimpression&adUnitId=11730597&publisherId=251978541&rid=b023975b404d495bafd5e20cc5743a9e&localId=w:8278E319-FE4C-D664-BDAB-F28E31699514&deviceId=6896199938771339&anid=

Remote address:

204.79.197.237:443

Request

GET /neg/0?action=emptycreativeimpression&adUnitId=11730597&publisherId=251978541&rid=b023975b404d495bafd5e20cc5743a9e&localId=w:8278E319-FE4C-D664-BDAB-F28E31699514&deviceId=6896199938771339&anid= HTTP/2.0
host: g.bing.com
accept-encoding: gzip, deflate
user-agent: WindowsShellClient/9.0.40929.0 (Windows)

Response

HTTP/2.0 204

cache-control: no-cache, must-revalidate
pragma: no-cache
expires: Fri, 01 Jan 1990 00:00:00 GMT
set-cookie: MUID=31DC04F3BA2E641D24BD1096BB956504; domain=.bing.com; expires=Tue, 13-May-2025 23:54:59 GMT; path=/; SameSite=None; Secure; Priority=High;
strict-transport-security: max-age=31536000; includeSubDomains; preload
access-control-allow-origin: *
x-cache: CONFIG_NOCACHE
accept-ch: Sec-CH-UA-Arch, Sec-CH-UA-Bitness, Sec-CH-UA-Full-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform, Sec-CH-UA-Platform-Version
x-msedge-ref: Ref A: 440B85437AA84B9391FDA2F6AD42DE99 Ref B: LON04EDGE0919 Ref C: 2024-04-18T23:54:59Z
date: Thu, 18 Apr 2024 23:54:58 GMT
GET

https://g.bing.com/neg/0?action=emptycreative&adUnitId=11730597&publisherId=251978541&rid=b023975b404d495bafd5e20cc5743a9e&localId=w:8278E319-FE4C-D664-BDAB-F28E31699514&deviceId=6896199938771339&anid=

Remote address:

204.79.197.237:443

Request

GET /neg/0?action=emptycreative&adUnitId=11730597&publisherId=251978541&rid=b023975b404d495bafd5e20cc5743a9e&localId=w:8278E319-FE4C-D664-BDAB-F28E31699514&deviceId=6896199938771339&anid= HTTP/2.0
host: g.bing.com
accept-encoding: gzip, deflate
user-agent: WindowsShellClient/9.0.40929.0 (Windows)
cookie: MUID=31DC04F3BA2E641D24BD1096BB956504

Response

HTTP/2.0 204

cache-control: no-cache, must-revalidate
pragma: no-cache
expires: Fri, 01 Jan 1990 00:00:00 GMT
set-cookie: MSPTC=k2WMNotN4xD-iofwBqGKZzu1e78Clo-BgZHIBPgvWrE; domain=.bing.com; expires=Tue, 13-May-2025 23:54:59 GMT; path=/; Partitioned; secure; SameSite=None
strict-transport-security: max-age=31536000; includeSubDomains; preload
access-control-allow-origin: *
x-cache: CONFIG_NOCACHE
accept-ch: Sec-CH-UA-Arch, Sec-CH-UA-Bitness, Sec-CH-UA-Full-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform, Sec-CH-UA-Platform-Version
x-msedge-ref: Ref A: D065DE8B314041F69C08ACC4C56E8B85 Ref B: LON04EDGE0919 Ref C: 2024-04-18T23:54:59Z
date: Thu, 18 Apr 2024 23:54:58 GMT
GET

https://g.bing.com/neg/0?action=emptycreativeimpression&adUnitId=11730597&publisherId=251978541&rid=b023975b404d495bafd5e20cc5743a9e&localId=w:8278E319-FE4C-D664-BDAB-F28E31699514&deviceId=6896199938771339&anid=

Remote address:

204.79.197.237:443

Request

GET /neg/0?action=emptycreativeimpression&adUnitId=11730597&publisherId=251978541&rid=b023975b404d495bafd5e20cc5743a9e&localId=w:8278E319-FE4C-D664-BDAB-F28E31699514&deviceId=6896199938771339&anid= HTTP/2.0
host: g.bing.com
accept-encoding: gzip, deflate
user-agent: WindowsShellClient/9.0.40929.0 (Windows)
cookie: MUID=31DC04F3BA2E641D24BD1096BB956504; MSPTC=k2WMNotN4xD-iofwBqGKZzu1e78Clo-BgZHIBPgvWrE

Response

HTTP/2.0 204

cache-control: no-cache, must-revalidate
pragma: no-cache
expires: Fri, 01 Jan 1990 00:00:00 GMT
strict-transport-security: max-age=31536000; includeSubDomains; preload
access-control-allow-origin: *
x-cache: CONFIG_NOCACHE
accept-ch: Sec-CH-UA-Arch, Sec-CH-UA-Bitness, Sec-CH-UA-Full-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform, Sec-CH-UA-Platform-Version
x-msedge-ref: Ref A: D653064B731549A5984D2934735B9CBD Ref B: LON04EDGE0919 Ref C: 2024-04-18T23:54:59Z
date: Thu, 18 Apr 2024 23:54:58 GMT
DNS

237.197.79.204.in-addr.arpa

Remote address:

8.8.8.8:53

Request

237.197.79.204.in-addr.arpa

IN PTR

Response
DNS

144.107.17.2.in-addr.arpa

Remote address:

8.8.8.8:53

Request

144.107.17.2.in-addr.arpa

IN PTR

Response

144.107.17.2.in-addr.arpa

IN PTR

a2-17-107-144deploystaticakamaitechnologiescom
DNS

21.114.53.23.in-addr.arpa

Remote address:

8.8.8.8:53

Request

21.114.53.23.in-addr.arpa

IN PTR

Response

21.114.53.23.in-addr.arpa

IN PTR

a23-53-114-21deploystaticakamaitechnologiescom
DNS

57.169.31.20.in-addr.arpa

Remote address:

8.8.8.8:53

Request

57.169.31.20.in-addr.arpa

IN PTR

Response
DNS

50.23.12.20.in-addr.arpa

Remote address:

8.8.8.8:53

Request

50.23.12.20.in-addr.arpa

IN PTR

Response
DNS

15.164.165.52.in-addr.arpa

Remote address:

8.8.8.8:53

Request

15.164.165.52.in-addr.arpa

IN PTR

Response
DNS

130.118.77.104.in-addr.arpa

Remote address:

8.8.8.8:53

Request

130.118.77.104.in-addr.arpa

IN PTR

Response

130.118.77.104.in-addr.arpa

IN PTR

a104-77-118-130deploystaticakamaitechnologiescom
DNS

172.210.232.199.in-addr.arpa

Remote address:

8.8.8.8:53

Request

172.210.232.199.in-addr.arpa

IN PTR

Response
DNS

13.227.111.52.in-addr.arpa

Remote address:

8.8.8.8:53

Request

13.227.111.52.in-addr.arpa

IN PTR

Response
DNS

41.134.221.88.in-addr.arpa

Remote address:

8.8.8.8:53

Request

41.134.221.88.in-addr.arpa

IN PTR

Response

41.134.221.88.in-addr.arpa

IN PTR

a88-221-134-41deploystaticakamaitechnologiescom
DNS

66.112.168.52.in-addr.arpa

Remote address:

8.8.8.8:53

Request

66.112.168.52.in-addr.arpa

IN PTR

Response

204.79.197.237:443

https://g.bing.com/neg/0?action=emptycreativeimpression&adUnitId=11730597&publisherId=251978541&rid=b023975b404d495bafd5e20cc5743a9e&localId=w:8278E319-FE4C-D664-BDAB-F28E31699514&deviceId=6896199938771339&anid=

tls, http2

2.0kB
9.2kB
22
19

HTTP Request

GET https://g.bing.com/neg/0?action=emptycreativeimpression&adUnitId=11730597&publisherId=251978541&rid=b023975b404d495bafd5e20cc5743a9e&localId=w:8278E319-FE4C-D664-BDAB-F28E31699514&deviceId=6896199938771339&anid=

HTTP Response

204

HTTP Request

GET https://g.bing.com/neg/0?action=emptycreative&adUnitId=11730597&publisherId=251978541&rid=b023975b404d495bafd5e20cc5743a9e&localId=w:8278E319-FE4C-D664-BDAB-F28E31699514&deviceId=6896199938771339&anid=

HTTP Response

204

HTTP Request

GET https://g.bing.com/neg/0?action=emptycreativeimpression&adUnitId=11730597&publisherId=251978541&rid=b023975b404d495bafd5e20cc5743a9e&localId=w:8278E319-FE4C-D664-BDAB-F28E31699514&deviceId=6896199938771339&anid=

HTTP Response

204
192.168.56.1:4782

Client.exe

260 B
5
192.168.56.1:4782

Client.exe

260 B
5
23.53.113.159:80

46 B
1
192.168.56.1:4782

Client.exe

260 B
5
192.168.56.1:4782

Client.exe

260 B
5
192.168.56.1:4782

Client.exe

260 B
5
192.168.56.1:4782

Client.exe

260 B
5

8.8.8.8:53

71.31.126.40.in-addr.arpa

dns

71 B
157 B
1
1

DNS Request

71.31.126.40.in-addr.arpa
8.8.8.8:53

g.bing.com

dns

168 B
151 B
3
1

DNS Request

g.bing.com

DNS Request

g.bing.com

DNS Request

g.bing.com

DNS Response

204.79.197.237

13.107.21.237
8.8.8.8:53

241.154.82.20.in-addr.arpa

dns

144 B
158 B
2
1

DNS Request

241.154.82.20.in-addr.arpa

DNS Request

241.154.82.20.in-addr.arpa
8.8.8.8:53

237.197.79.204.in-addr.arpa

dns

73 B
143 B
1
1

DNS Request

237.197.79.204.in-addr.arpa
8.8.8.8:53

144.107.17.2.in-addr.arpa

dns

71 B
135 B
1
1

DNS Request

144.107.17.2.in-addr.arpa
8.8.8.8:53

21.114.53.23.in-addr.arpa

dns

71 B
135 B
1
1

DNS Request

21.114.53.23.in-addr.arpa
8.8.8.8:53

57.169.31.20.in-addr.arpa

dns

71 B
157 B
1
1

DNS Request

57.169.31.20.in-addr.arpa
8.8.8.8:53

50.23.12.20.in-addr.arpa

dns

70 B
156 B
1
1

DNS Request

50.23.12.20.in-addr.arpa
8.8.8.8:53

15.164.165.52.in-addr.arpa

dns

72 B
146 B
1
1

DNS Request

15.164.165.52.in-addr.arpa
8.8.8.8:53

130.118.77.104.in-addr.arpa

dns

73 B
139 B
1
1

DNS Request

130.118.77.104.in-addr.arpa
8.8.8.8:53

172.210.232.199.in-addr.arpa

dns

74 B
128 B
1
1

DNS Request

172.210.232.199.in-addr.arpa
8.8.8.8:53

13.227.111.52.in-addr.arpa

dns

72 B
158 B
1
1

DNS Request

13.227.111.52.in-addr.arpa
8.8.8.8:53

41.134.221.88.in-addr.arpa

dns

72 B
137 B
1
1

DNS Request

41.134.221.88.in-addr.arpa
8.8.8.8:53

66.112.168.52.in-addr.arpa

dns

72 B
146 B
1
1

DNS Request

66.112.168.52.in-addr.arpa

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Scheduled Task/Job

T1053

Privilege Escalation

Scheduled Task/Job

T1053

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Windows\System32\SubDir\Client.exe

Filesize
3.1MB

MD5
c52e8cb313bd0e446cb9607636bbc6ec

SHA1
77d3ca1584e486528e39802449027cd9e8b08b83

SHA256
8168236516ecd464c7c004c1d824ace70932b9dd61c9e238256965c33f059583

SHA512
d8bdbad8a179c74f2479da58af5530782a1683e07ad656b91ee05b0b00daa8008d1e7143b34eae16ef6ef612e1f742832ae9b9167ac2286799075886d1a66a45

Download Submit
memory/436-9-0x00007FFC5BBE0000-0x00007FFC5C6A1000-memory.dmp

Filesize
10.8MB

Download
memory/436-10-0x0000000001360000-0x0000000001370000-memory.dmp

Filesize
64KB

Download
memory/436-11-0x0000000002D40000-0x0000000002D90000-memory.dmp

Filesize
320KB

Download
memory/436-12-0x000000001C440000-0x000000001C4F2000-memory.dmp

Filesize
712KB

Download
memory/436-13-0x00007FFC5BBE0000-0x00007FFC5C6A1000-memory.dmp

Filesize
10.8MB

Download
memory/944-0-0x00000000003D0000-0x00000000006F4000-memory.dmp

Filesize
3.1MB

Download
memory/944-1-0x00007FFC5BBE0000-0x00007FFC5C6A1000-memory.dmp

Filesize
10.8MB

Download
memory/944-2-0x000000001B4A0000-0x000000001B4B0000-memory.dmp

Filesize
64KB

Download
memory/944-8-0x00007FFC5BBE0000-0x00007FFC5C6A1000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

HTTP Request

HTTP Response

HTTP Request

HTTP Response

HTTP Request

HTTP Response

DNS Request

DNS Request

DNS Request

DNS Request

DNS Response

DNS Request

DNS Request

DNS Request

DNS Request

DNS Request

DNS Request

DNS Request

DNS Request

DNS Request

DNS Request

DNS Request

DNS Request

DNS Request

MITRE ATT&CK Enterprise v15

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