quasar | 84ccda8f5546361630314c5d7be711813e47a8c9f228f8be898691af5cdb9c6d

General

Target

Windows-Activation.zip
Size

1.1MB
MD5

a95f11ca5a79851b841d4067575157b5
SHA1

38e9c2468ca0dff7d8a29326e8b3f088d53cd8c1
SHA256

84ccda8f5546361630314c5d7be711813e47a8c9f228f8be898691af5cdb9c6d
SHA512

b0361fe666150041221f87bf350e7b7302ecc948e20ef04930c689e60213c992ac0f739705aa9648a3a04b092385fadee4ac4aa4c708f41678bf25be7e7a11a3
SSDEEP

24576:HUY21azKI3AQUwlibre9F7x17QtC+UqRurDQwIjbkq/DiC43JgHCD362:tZXb0C+Uiur0LaPgO62

Score

10^/10

quasar svchost.exe spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Svchost.exe

C2

192.168.1.190:4782

Mutex

75ec4d04-9201-465b-9d52-07fbf8901610

Attributes

encryption_key
BC9F0EB6E1FA6B8559DDF8DE0AEF08110EBCF8E5
install_name
Svchostt.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Svchostt.exe

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/files/0x001d00000002abe8-3.dat	family_quasar
behavioral1/memory/4736-5-0x0000000000510000-0x0000000000834000-memory.dmp	family_quasar

Executes dropped EXE 2 IoCs

pid	Process
4736	Windows-Activation.exe
2804	Svchostt.exe

Drops file in System32 directory 3 IoCs

description	ioc	Process
File created	C:\Windows\system32\Svchostt.exe	Windows-Activation.exe
File opened for modification	C:\Windows\system32\Svchostt.exe	Windows-Activation.exe
File opened for modification	C:\Windows\system32\Svchostt.exe	Svchostt.exe

Checks SCSI registry key(s) 3 TTPs 3 IoCs

SCSI information is often read in order to detect sandboxing environments.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_WDC&Prod_WDS100T2B0A\4&215468a5&0&000000	taskmgr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_WDC&Prod_WDS100T2B0A\4&215468a5&0&000000\Properties\{b725f130-47ef-101a-a5f1-02608c9eebac}\000A	taskmgr.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_WDC&Prod_WDS100T2B0A\4&215468a5&0&000000\FriendlyName	taskmgr.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
2072	schtasks.exe
1880	schtasks.exe

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
4540	taskmgr.exe
4540	taskmgr.exe
4540	taskmgr.exe
4540	taskmgr.exe
4540	taskmgr.exe
4540	taskmgr.exe
4540	taskmgr.exe
4540	taskmgr.exe
4540	taskmgr.exe
4540	taskmgr.exe
4540	taskmgr.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeRestorePrivilege	4144	7zFM.exe
Token: 35	4144	7zFM.exe
Token: SeSecurityPrivilege	4144	7zFM.exe
Token: SeDebugPrivilege	4736	Windows-Activation.exe
Token: SeDebugPrivilege	2804	Svchostt.exe
Token: SeDebugPrivilege	4540	taskmgr.exe
Token: SeSystemProfilePrivilege	4540	taskmgr.exe
Token: SeCreateGlobalPrivilege	4540	taskmgr.exe

Suspicious use of FindShellTrayWindow 25 IoCs

pid	Process
4144	7zFM.exe
4144	7zFM.exe
4540	taskmgr.exe
4540	taskmgr.exe
4540	taskmgr.exe
4540	taskmgr.exe
4540	taskmgr.exe
4540	taskmgr.exe
4540	taskmgr.exe
4540	taskmgr.exe
4540	taskmgr.exe
4540	taskmgr.exe
4540	taskmgr.exe
4540	taskmgr.exe
4540	taskmgr.exe
4540	taskmgr.exe
4540	taskmgr.exe
4540	taskmgr.exe
4540	taskmgr.exe
4540	taskmgr.exe
4540	taskmgr.exe
4540	taskmgr.exe
4540	taskmgr.exe
4540	taskmgr.exe
4540	taskmgr.exe

Suspicious use of SendNotifyMessage 23 IoCs

pid	Process
4540	taskmgr.exe
4540	taskmgr.exe
4540	taskmgr.exe
4540	taskmgr.exe
4540	taskmgr.exe
4540	taskmgr.exe
4540	taskmgr.exe
4540	taskmgr.exe
4540	taskmgr.exe
4540	taskmgr.exe
4540	taskmgr.exe
4540	taskmgr.exe
4540	taskmgr.exe
4540	taskmgr.exe
4540	taskmgr.exe
4540	taskmgr.exe
4540	taskmgr.exe
4540	taskmgr.exe
4540	taskmgr.exe
4540	taskmgr.exe
4540	taskmgr.exe
4540	taskmgr.exe
4540	taskmgr.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2804	Svchostt.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4736 wrote to memory of 2072	4736	Windows-Activation.exe	82
PID 4736 wrote to memory of 2072	4736	Windows-Activation.exe	82
PID 4736 wrote to memory of 2804	4736	Windows-Activation.exe	84
PID 4736 wrote to memory of 2804	4736	Windows-Activation.exe	84
PID 2804 wrote to memory of 1880	2804	Svchostt.exe	85
PID 2804 wrote to memory of 1880	2804	Svchostt.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:\Program Files\7-Zip\7zFM.exe
"C:\Program Files\7-Zip\7zFM.exe" "C:\Users\Admin\AppData\Local\Temp\Windows-Activation.zip"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
PID:4144

C:\Users\Admin\Desktop\Windows-Activation.exe
"C:\Users\Admin\Desktop\Windows-Activation.exe"
1⤵
- Executes dropped EXE
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4736
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "Svchostt.exe" /sc ONLOGON /tr "C:\Windows\system32\Svchostt.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2072
- C:\Windows\system32\Svchostt.exe
  "C:\Windows\system32\Svchostt.exe"
  2⤵
  - Executes dropped EXE
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2804
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn "Svchostt.exe" /sc ONLOGON /tr "C:\Windows\system32\Svchostt.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:1880

C:\Windows\system32\taskmgr.exe
"C:\Windows\system32\taskmgr.exe" /0
1⤵
- Checks SCSI registry key(s)
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
PID:4540

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Credential Access

Discovery

Peripheral Device Discovery

Query Registry

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\Windows\Explorer\iconcache_idx.db

Filesize
14KB

MD5
d72fe1fd9a3b804f637f69d9729e513e

SHA1
a3af8c93c8c4f9c06279379b080d3edbdc300355

SHA256
353d1374c3f454effbabc1dfe13ce3a9bfeac31494a992df8e9e43fc1c36b3d9

SHA512
04e3397e77dfb5c72206248cc218dc908afdf03af9e4e2617f20e7a44429bfa63b22a6a49b7391d4da0e950daf62aceb241222a3c57f713208858cc2b5141d86

Download Submit
C:\Users\Admin\Desktop\Windows-Activation.exe

Filesize
3.1MB

MD5
ae747de0584eeab55957aa8ec12ba488

SHA1
41483b8e1ff488a546e08de74ac09300fe63c80b

SHA256
300bad38953dd87cda952bb60f1999a5ea1f9c0f64a3f0f842633b982b15194b

SHA512
f744156f05ebe0adbbe0e3973783e60e0d2b98ea8c33a147f0e1afe1cdd749b994453b7da4f8c45c73af0569453f85dacddde57820aa1f9a94e3f7350445b68c

Download Submit
memory/2804-16-0x000000001B170000-0x000000001B1C0000-memory.dmp

Filesize
320KB

Download
memory/2804-17-0x000000001BA10000-0x000000001BAC2000-memory.dmp

Filesize
712KB

Download
memory/4540-31-0x00000262068D0000-0x00000262068D1000-memory.dmp

Filesize
4KB

Download
memory/4540-30-0x00000262068D0000-0x00000262068D1000-memory.dmp

Filesize
4KB

Download
memory/4540-25-0x00000262068D0000-0x00000262068D1000-memory.dmp

Filesize
4KB

Download
memory/4540-26-0x00000262068D0000-0x00000262068D1000-memory.dmp

Filesize
4KB

Download
memory/4540-19-0x00000262068D0000-0x00000262068D1000-memory.dmp

Filesize
4KB

Download
memory/4540-21-0x00000262068D0000-0x00000262068D1000-memory.dmp

Filesize
4KB

Download
memory/4540-20-0x00000262068D0000-0x00000262068D1000-memory.dmp

Filesize
4KB

Download
memory/4540-27-0x00000262068D0000-0x00000262068D1000-memory.dmp

Filesize
4KB

Download
memory/4540-28-0x00000262068D0000-0x00000262068D1000-memory.dmp

Filesize
4KB

Download
memory/4540-29-0x00000262068D0000-0x00000262068D1000-memory.dmp

Filesize
4KB

Download
memory/4736-4-0x00007FFC74D63000-0x00007FFC74D65000-memory.dmp

Filesize
8KB

Download
memory/4736-15-0x00007FFC74D60000-0x00007FFC75822000-memory.dmp

Filesize
10.8MB

Download
memory/4736-5-0x0000000000510000-0x0000000000834000-memory.dmp

Filesize
3.1MB

Download
memory/4736-6-0x00007FFC74D60000-0x00007FFC75822000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads