quasar | 1d0128fd3184a765076397dd308e51bbc578a3639cb9c08ab6b5c36704d772b4

Resubmissions

14-11-2023 17:31

231114-v3qg7acf42 10

14-11-2023 17:21

28-10-2023 19:29

24-10-2023 13:29

18-10-2023 12:04

07-09-2023 12:10

Analysis

max time kernel
438s
max time network
443s
platform
windows10-2004_x64
resource
win10v2004-20231023-en
resource tags

arch:x64arch:x86image:win10v2004-20231023-enlocale:en-usos:windows10-2004-x64system
submitted
24-10-2023 13:29

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General

Target

962bbb1929620dc69e35d52ce7e9684412e16e8ad2727222dbe3e47e9220f8e2.exe
Size

756KB
MD5

24badcb6d982b8851e6b6d8bbf07cd80
SHA1

9532a957539e1f6a460028662bfbb1272c13c4c9
SHA256

962bbb1929620dc69e35d52ce7e9684412e16e8ad2727222dbe3e47e9220f8e2
SHA512

937de43c7c30b197e2b20cee535d5b326030f9f4ba9a69ff4e1ab59d47aa9eb9f0dcc56c06501f13cfc6d468759ddcd0e0c274885d855464946cee0e04a72a5d
SSDEEP

12288:xpYbOsMEDla4b+o6rZa97avKECLgCZMaxq:/6MERa4ibZa9t8GMa

Score

10^/10

quasar osu persistence spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.0.0

Botnet

osu

maniac.http80.info:4545

Mutex

zBta8WeDOfnNzuyXon

Attributes

encryption_key
8Egbvbf22NkYGBnTSrbh
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 3 IoCs

resource	yara_rule
behavioral20/memory/2840-14-0x0000000000400000-0x0000000000466000-memory.dmp	family_quasar
behavioral20/memory/2840-17-0x0000000000600000-0x000000000064E000-memory.dmp	family_quasar
behavioral20/memory/2840-30-0x0000000000400000-0x000000000044E000-memory.dmp	family_quasar

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-984744499-3605095035-265325720-1000\Control Panel\International\Geo\Nation	962bbb1929620dc69e35d52ce7e9684412e16e8ad2727222dbe3e47e9220f8e2.exe
Key value queried	\REGISTRY\USER\S-1-5-21-984744499-3605095035-265325720-1000\Control Panel\International\Geo\Nation	WScript.exe

Executes dropped EXE 2 IoCs

pid	Process
1796	chrome.exe
2840	chrome.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-984744499-3605095035-265325720-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\Google Chrome = "C:\\Users\\Admin\\AppData\\Local\\Temp\\subfolder\\chrome.vbs"	WScript.exe

Looks up external IP address via web service 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
21	ip-api.com

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-984744499-3605095035-265325720-1000_Classes\Local Settings	962bbb1929620dc69e35d52ce7e9684412e16e8ad2727222dbe3e47e9220f8e2.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2840	chrome.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
5032	962bbb1929620dc69e35d52ce7e9684412e16e8ad2727222dbe3e47e9220f8e2.exe
1796	chrome.exe
2840	chrome.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 5032 wrote to memory of 5108	5032	962bbb1929620dc69e35d52ce7e9684412e16e8ad2727222dbe3e47e9220f8e2.exe	89
PID 5032 wrote to memory of 5108	5032	962bbb1929620dc69e35d52ce7e9684412e16e8ad2727222dbe3e47e9220f8e2.exe	89
PID 5032 wrote to memory of 5108	5032	962bbb1929620dc69e35d52ce7e9684412e16e8ad2727222dbe3e47e9220f8e2.exe	89
PID 5108 wrote to memory of 1796	5108	WScript.exe	90
PID 5108 wrote to memory of 1796	5108	WScript.exe	90
PID 5108 wrote to memory of 1796	5108	WScript.exe	90
PID 1796 wrote to memory of 2840	1796	chrome.exe	91
PID 1796 wrote to memory of 2840	1796	chrome.exe	91
PID 1796 wrote to memory of 2840	1796	chrome.exe	91
PID 1796 wrote to memory of 2840	1796	chrome.exe	91
PID 1796 wrote to memory of 2840	1796	chrome.exe	91
PID 1796 wrote to memory of 2840	1796	chrome.exe	91
PID 1796 wrote to memory of 2840	1796	chrome.exe	91
PID 1796 wrote to memory of 2840	1796	chrome.exe	91
PID 1796 wrote to memory of 2840	1796	chrome.exe	91
PID 1796 wrote to memory of 2840	1796	chrome.exe	91
PID 1796 wrote to memory of 2840	1796	chrome.exe	91
PID 1796 wrote to memory of 2840	1796	chrome.exe	91
PID 1796 wrote to memory of 2840	1796	chrome.exe	91
PID 1796 wrote to memory of 2840	1796	chrome.exe	91
PID 1796 wrote to memory of 2840	1796	chrome.exe	91

C:\Users\Admin\AppData\Local\Temp\962bbb1929620dc69e35d52ce7e9684412e16e8ad2727222dbe3e47e9220f8e2.exe
"C:\Users\Admin\AppData\Local\Temp\962bbb1929620dc69e35d52ce7e9684412e16e8ad2727222dbe3e47e9220f8e2.exe"
1⤵
- Checks computer location settings
- Modifies registry class
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:5032
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\subfolder\chrome.vbs"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - Suspicious use of WriteProcessMemory
  PID:5108
- - C:\Users\Admin\AppData\Local\Temp\subfolder\chrome.exe
    "C:\Users\Admin\AppData\Local\Temp\subfolder\chrome.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:1796
  - - C:\Users\Admin\AppData\Local\Temp\subfolder\chrome.exe
      "C:\Users\Admin\AppData\Local\Temp\subfolder\chrome.exe"
      4⤵
      Executes dropped EXE
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of SetWindowsHookEx
      PID:2840

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\subfolder\chrome.exe

Filesize
756KB

MD5
299d1c44c38873d5cda63e7dc80166f9

SHA1
e4574294f0c6732127ee1eb190912d44974ebc15

SHA256
dc62195472a52f6a6ea66872b3020bdd2fb3cbf9b17c5c8e530522c8851a7f75

SHA512
c1a9cf8c14821c692d767f76474de40c93bff59efd7419171bf9f0d387b7ed62ac1a8db83c12a1217cad9b116b0fb3be6b66a9e971caa8d468299a3d50e7ea3b

Download Submit
C:\Users\Admin\AppData\Local\Temp\subfolder\chrome.exe

Filesize
756KB

MD5
299d1c44c38873d5cda63e7dc80166f9

SHA1
e4574294f0c6732127ee1eb190912d44974ebc15

SHA256
dc62195472a52f6a6ea66872b3020bdd2fb3cbf9b17c5c8e530522c8851a7f75

SHA512
c1a9cf8c14821c692d767f76474de40c93bff59efd7419171bf9f0d387b7ed62ac1a8db83c12a1217cad9b116b0fb3be6b66a9e971caa8d468299a3d50e7ea3b

Download Submit
C:\Users\Admin\AppData\Local\Temp\subfolder\chrome.exe

Filesize
756KB

MD5
299d1c44c38873d5cda63e7dc80166f9

SHA1
e4574294f0c6732127ee1eb190912d44974ebc15

SHA256
dc62195472a52f6a6ea66872b3020bdd2fb3cbf9b17c5c8e530522c8851a7f75

SHA512
c1a9cf8c14821c692d767f76474de40c93bff59efd7419171bf9f0d387b7ed62ac1a8db83c12a1217cad9b116b0fb3be6b66a9e971caa8d468299a3d50e7ea3b

Download Submit
C:\Users\Admin\AppData\Local\Temp\subfolder\chrome.vbs

Filesize
1024B

MD5
95fd611c303dfd75b4a3694194f9c1b4

SHA1
22d2fb834cc4822253900e836e979c3cfb44c7cc

SHA256
53f2d73a047e09e977f49391db8992785e72a81573f6ea868fec4f2d48974370

SHA512
2036efe6a0165864ff0d719da548f64fe604957cd2eee397f904f92fc8d384b5cb50b3b48c274094671877e15aeb438ac74a2ff49bc9d4eb8d0e5d09eb736d96

Download Submit
memory/1796-13-0x00000000006D0000-0x00000000006D6000-memory.dmp

Filesize
24KB

Download
memory/2840-17-0x0000000000600000-0x000000000064E000-memory.dmp

Filesize
312KB

Download
memory/2840-26-0x0000000005BF0000-0x0000000005C2C000-memory.dmp

Filesize
240KB

Download
memory/2840-15-0x00000000001C0000-0x00000000001C1000-memory.dmp

Filesize
4KB

Download
memory/2840-16-0x0000000074530000-0x0000000074CE0000-memory.dmp

Filesize
7.7MB

Download
memory/2840-18-0x0000000004960000-0x0000000004970000-memory.dmp

Filesize
64KB

Download
memory/2840-32-0x0000000074530000-0x0000000074CE0000-memory.dmp

Filesize
7.7MB

Download
memory/2840-19-0x0000000004960000-0x0000000004970000-memory.dmp

Filesize
64KB

Download
memory/2840-20-0x0000000004960000-0x0000000004970000-memory.dmp

Filesize
64KB

Download
memory/2840-21-0x0000000004970000-0x0000000004F14000-memory.dmp

Filesize
5.6MB

Download
memory/2840-22-0x00000000048B0000-0x0000000004942000-memory.dmp

Filesize
584KB

Download
memory/2840-23-0x0000000004960000-0x0000000004970000-memory.dmp

Filesize
64KB

Download
memory/2840-24-0x0000000005220000-0x0000000005286000-memory.dmp

Filesize
408KB

Download
memory/2840-25-0x0000000005690000-0x00000000056A2000-memory.dmp

Filesize
72KB

Download
memory/2840-14-0x0000000000400000-0x0000000000466000-memory.dmp

Filesize
408KB

Download
memory/2840-28-0x0000000005F80000-0x0000000005F8A000-memory.dmp

Filesize
40KB

Download
memory/2840-30-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/5032-2-0x0000000002290000-0x0000000002296000-memory.dmp

Filesize
24KB

Download

Resubmissions

Analysis

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General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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