quasar | 5057c9d2aef506507ce6446a1880bf4412d66509dfc8ddf2a10aaaf3d24b71c8

General

Target

Client-built.exe
Size

1.6MB
MD5

fb20750c6897828894a8898ec4981247
SHA1

6c69199fea80c61a33c661424c5b32f5616f98a8
SHA256

5057c9d2aef506507ce6446a1880bf4412d66509dfc8ddf2a10aaaf3d24b71c8
SHA512

9167a40048dd341a4c1f78849ab974f1ffd4bd95e840fcb9dd30d5d0bd1d92384c2cd5a213cc845f579d2273b9ecd78f06ba78a7ba8b6920b583061fad0b5cf5
SSDEEP

24576:HJodbAroAS2HIPbcNE0KKzaOwIRxl2Sk43mw5CLZzc4tMx1:pOyEwKKzwipTIZc4U

Score

10^/10

quasar spyware trojan

Malware Config

Signatures

Quasar RAT
Quasar is an open source Remote Access Tool.
trojan spyware quasar
Quasar family
quasar

Quasar payload 3 IoCs

resource	yara_rule
behavioral1/memory/3292-1-0x00000185999A0000-0x0000018599B34000-memory.dmp	family_quasar
behavioral1/memory/3292-2-0x0000018599F70000-0x0000018599F8A000-memory.dmp	family_quasar
behavioral1/files/0x001a00000002b1af-7.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
1100	svchost.exe

Drops file in System32 directory 5 IoCs

description	ioc	Process
File opened for modification	C:\Windows\system32\SubDir	svchost.exe
File created	C:\Windows\system32\SubDir\svchost.exe	Client-built.exe
File opened for modification	C:\Windows\system32\SubDir\svchost.exe	Client-built.exe
File opened for modification	C:\Windows\system32\SubDir	Client-built.exe
File opened for modification	C:\Windows\system32\SubDir\svchost.exe	svchost.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
5900	schtasks.exe
1844	schtasks.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
1100	svchost.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3292	Client-built.exe
Token: SeDebugPrivilege	1100	svchost.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1100	svchost.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3292 wrote to memory of 5900	3292	Client-built.exe	79
PID 3292 wrote to memory of 5900	3292	Client-built.exe	79
PID 3292 wrote to memory of 1100	3292	Client-built.exe	81
PID 3292 wrote to memory of 1100	3292	Client-built.exe	81
PID 1100 wrote to memory of 1844	1100	svchost.exe	82
PID 1100 wrote to memory of 1844	1100	svchost.exe	82

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\Client-built.exe
"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3292
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "Windows Repair Tool" /sc ONLOGON /tr "C:\Windows\system32\SubDir\svchost.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:5900
- C:\Windows\system32\SubDir\svchost.exe
  "C:\Windows\system32\SubDir\svchost.exe"
  2⤵
  - Executes dropped EXE
  - Drops file in System32 directory
  - Suspicious behavior: AddClipboardFormatListener
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1100
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "Windows Repair Tool" /sc ONLOGON /tr "C:\Windows\system32\SubDir\svchost.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:1844

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

Query Registry

1

T1012

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
1.6MB

MD5
fb20750c6897828894a8898ec4981247

SHA1
6c69199fea80c61a33c661424c5b32f5616f98a8

SHA256
5057c9d2aef506507ce6446a1880bf4412d66509dfc8ddf2a10aaaf3d24b71c8

SHA512
9167a40048dd341a4c1f78849ab974f1ffd4bd95e840fcb9dd30d5d0bd1d92384c2cd5a213cc845f579d2273b9ecd78f06ba78a7ba8b6920b583061fad0b5cf5

Download Submit
memory/1100-14-0x000001487A6C0000-0x000001487A772000-memory.dmp

Filesize
712KB

Download
memory/1100-16-0x00007FFEE5E40000-0x00007FFEE6902000-memory.dmp

Filesize
10.8MB

Download
memory/1100-22-0x00007FFEE5E40000-0x00007FFEE6902000-memory.dmp

Filesize
10.8MB

Download
memory/1100-20-0x000001487A660000-0x000001487A69C000-memory.dmp

Filesize
240KB

Download
memory/1100-19-0x000001487A600000-0x000001487A612000-memory.dmp

Filesize
72KB

Download
memory/1100-11-0x00007FFEE5E40000-0x00007FFEE6902000-memory.dmp

Filesize
10.8MB

Download
memory/1100-12-0x000001487A2C0000-0x000001487A2D2000-memory.dmp

Filesize
72KB

Download
memory/1100-13-0x000001487A320000-0x000001487A370000-memory.dmp

Filesize
320KB

Download
memory/1100-15-0x000001487A2D0000-0x000001487A31E000-memory.dmp

Filesize
312KB

Download
memory/3292-0-0x00007FFEE5E43000-0x00007FFEE5E45000-memory.dmp

Filesize
8KB

Download
memory/3292-2-0x0000018599F70000-0x0000018599F8A000-memory.dmp

Filesize
104KB

Download
memory/3292-10-0x00007FFEE5E40000-0x00007FFEE6902000-memory.dmp

Filesize
10.8MB

Download
memory/3292-1-0x00000185999A0000-0x0000018599B34000-memory.dmp

Filesize
1.6MB

Download
memory/3292-3-0x00007FFEE5E40000-0x00007FFEE6902000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads