quasar | ce17ceabb0271fc086f17eeda13a42934aeb9122bf89dcdc50ee9490f515c0e5

General

Target

KRcLFIz5PCQunB7.exe
Size

3.5MB
MD5

a08b35662044abf9528c24c3f663eaed
SHA1

aee7831f263e6b83198a790d8a8948a841a600e2
SHA256

3f233256d32f8c33884510be0e50b614a35642f6ed7cb76b1f480373b548b295
SHA512

0866868cbf52999b233546348cde08c3cfcf2deef86830a319d8430e6d815a02b8438f46c944fbd9f2010d7e9fcb6f4f77db490280894b899de0afc71278b5dd
SSDEEP

49152:Uf+eHq329+bhPCNJZxh2H4s0E04nfxhFZ9kIODfdWutT825SkDh83TQ237w4fGi:U+MrJZqYsTfnFZ9ktfgtSSTQ23s4p

Score

10^/10

quasar flo discovery spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

FLO

C2

qtd.ydns.eu:5829

Mutex

ac3de377-7a66-4586-b523-567adbbba988

Attributes

encryption_key
C5B555A83D127A9553D4FB1FCECB35CE8E91A447
install_name
outlooks.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Outlooks
subdirectory
WindowsUpdates

Signatures

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

Quasar payload 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2880-17-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar
behavioral1/memory/2880-20-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar
behavioral1/memory/2880-15-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar
behavioral1/memory/2880-11-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar
behavioral1/memory/2880-9-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar

Executes dropped EXE 2 IoCs

Processes:

outlooks.exeoutlooks.exe

pid process

2896 outlooks.exe
2844 outlooks.exe
Loads dropped DLL 1 IoCs

Processes:

KRcLFIz5PCQunB7.exe

pid process

2880 KRcLFIz5PCQunB7.exe

pid	process
2896	outlooks.exe
2844	outlooks.exe

pid	process
2880	KRcLFIz5PCQunB7.exe

Suspicious use of SetThreadContext 2 IoCs

Processes:

KRcLFIz5PCQunB7.exeoutlooks.exe

description	pid	process	target process
PID 2304 set thread context of 2880	2304	KRcLFIz5PCQunB7.exe	KRcLFIz5PCQunB7.exe
PID 2896 set thread context of 2844	2896	outlooks.exe	outlooks.exe

System Location Discovery: System Language Discovery 1 TTPs 6 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

Processes:

schtasks.exeKRcLFIz5PCQunB7.exeKRcLFIz5PCQunB7.exeschtasks.exeoutlooks.exeoutlooks.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	KRcLFIz5PCQunB7.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	KRcLFIz5PCQunB7.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	outlooks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	outlooks.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

Processes:

schtasks.exeschtasks.exe

pid process

2824 schtasks.exe
2860 schtasks.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

KRcLFIz5PCQunB7.exeoutlooks.exe

description pid process

Token: SeDebugPrivilege 2880 KRcLFIz5PCQunB7.exe
Token: SeDebugPrivilege 2844 outlooks.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

outlooks.exe

pid process

2844 outlooks.exe

pid	process
2824	schtasks.exe
2860	schtasks.exe

description	pid	process
Token: SeDebugPrivilege	2880	KRcLFIz5PCQunB7.exe
Token: SeDebugPrivilege	2844	outlooks.exe

pid	process
2844	outlooks.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

KRcLFIz5PCQunB7.exeKRcLFIz5PCQunB7.exeoutlooks.exeoutlooks.exe

description	pid	process	target process
PID 2304 wrote to memory of 2880	2304	KRcLFIz5PCQunB7.exe	KRcLFIz5PCQunB7.exe
PID 2304 wrote to memory of 2880	2304	KRcLFIz5PCQunB7.exe	KRcLFIz5PCQunB7.exe
PID 2304 wrote to memory of 2880	2304	KRcLFIz5PCQunB7.exe	KRcLFIz5PCQunB7.exe
PID 2304 wrote to memory of 2880	2304	KRcLFIz5PCQunB7.exe	KRcLFIz5PCQunB7.exe
PID 2304 wrote to memory of 2880	2304	KRcLFIz5PCQunB7.exe	KRcLFIz5PCQunB7.exe
PID 2304 wrote to memory of 2880	2304	KRcLFIz5PCQunB7.exe	KRcLFIz5PCQunB7.exe
PID 2304 wrote to memory of 2880	2304	KRcLFIz5PCQunB7.exe	KRcLFIz5PCQunB7.exe
PID 2304 wrote to memory of 2880	2304	KRcLFIz5PCQunB7.exe	KRcLFIz5PCQunB7.exe
PID 2304 wrote to memory of 2880	2304	KRcLFIz5PCQunB7.exe	KRcLFIz5PCQunB7.exe
PID 2880 wrote to memory of 2824	2880	KRcLFIz5PCQunB7.exe	schtasks.exe
PID 2880 wrote to memory of 2824	2880	KRcLFIz5PCQunB7.exe	schtasks.exe
PID 2880 wrote to memory of 2824	2880	KRcLFIz5PCQunB7.exe	schtasks.exe
PID 2880 wrote to memory of 2824	2880	KRcLFIz5PCQunB7.exe	schtasks.exe
PID 2880 wrote to memory of 2896	2880	KRcLFIz5PCQunB7.exe	outlooks.exe
PID 2880 wrote to memory of 2896	2880	KRcLFIz5PCQunB7.exe	outlooks.exe
PID 2880 wrote to memory of 2896	2880	KRcLFIz5PCQunB7.exe	outlooks.exe
PID 2880 wrote to memory of 2896	2880	KRcLFIz5PCQunB7.exe	outlooks.exe
PID 2896 wrote to memory of 2844	2896	outlooks.exe	outlooks.exe
PID 2896 wrote to memory of 2844	2896	outlooks.exe	outlooks.exe
PID 2896 wrote to memory of 2844	2896	outlooks.exe	outlooks.exe
PID 2896 wrote to memory of 2844	2896	outlooks.exe	outlooks.exe
PID 2896 wrote to memory of 2844	2896	outlooks.exe	outlooks.exe
PID 2896 wrote to memory of 2844	2896	outlooks.exe	outlooks.exe
PID 2896 wrote to memory of 2844	2896	outlooks.exe	outlooks.exe
PID 2896 wrote to memory of 2844	2896	outlooks.exe	outlooks.exe
PID 2896 wrote to memory of 2844	2896	outlooks.exe	outlooks.exe
PID 2844 wrote to memory of 2860	2844	outlooks.exe	schtasks.exe
PID 2844 wrote to memory of 2860	2844	outlooks.exe	schtasks.exe
PID 2844 wrote to memory of 2860	2844	outlooks.exe	schtasks.exe
PID 2844 wrote to memory of 2860	2844	outlooks.exe	schtasks.exe

C:\Users\Admin\AppData\Local\Temp\KRcLFIz5PCQunB7.exe
"C:\Users\Admin\AppData\Local\Temp\KRcLFIz5PCQunB7.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2304
- C:\Users\Admin\AppData\Local\Temp\KRcLFIz5PCQunB7.exe
  "C:\Users\Admin\AppData\Local\Temp\KRcLFIz5PCQunB7.exe"
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2880
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks" /create /tn "Outlooks" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\WindowsUpdates\outlooks.exe" /rl HIGHEST /f
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2824
- - C:\Users\Admin\AppData\Roaming\WindowsUpdates\outlooks.exe
    "C:\Users\Admin\AppData\Roaming\WindowsUpdates\outlooks.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2896
  - - C:\Users\Admin\AppData\Roaming\WindowsUpdates\outlooks.exe
      "C:\Users\Admin\AppData\Roaming\WindowsUpdates\outlooks.exe"
      4⤵
      Executes dropped EXE
      System Location Discovery: System Language Discovery
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of SetWindowsHookEx
      Suspicious use of WriteProcessMemory
      PID:2844
    - - C:\Windows\SysWOW64\schtasks.exe
        
        "schtasks" /create /tn "Outlooks" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\WindowsUpdates\outlooks.exe" /rl HIGHEST /f
        5⤵
        System Location Discovery: System Language Discovery
        Scheduled Task/Job: Scheduled Task
        
        PID:2860

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

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

\Users\Admin\AppData\Roaming\WindowsUpdates\outlooks.exe

Filesize
3.5MB

MD5
a08b35662044abf9528c24c3f663eaed

SHA1
aee7831f263e6b83198a790d8a8948a841a600e2

SHA256
3f233256d32f8c33884510be0e50b614a35642f6ed7cb76b1f480373b548b295

SHA512
0866868cbf52999b233546348cde08c3cfcf2deef86830a319d8430e6d815a02b8438f46c944fbd9f2010d7e9fcb6f4f77db490280894b899de0afc71278b5dd

Download Submit
memory/2304-22-0x0000000074080000-0x000000007476E000-memory.dmp

Filesize
6.9MB

Download
memory/2304-0-0x000000007408E000-0x000000007408F000-memory.dmp

Filesize
4KB

Download
memory/2304-1-0x0000000000C30000-0x0000000000FC0000-memory.dmp

Filesize
3.6MB

Download
memory/2304-4-0x00000000002A0000-0x00000000002B2000-memory.dmp

Filesize
72KB

Download
memory/2304-5-0x0000000074080000-0x000000007476E000-memory.dmp

Filesize
6.9MB

Download
memory/2304-6-0x0000000005C60000-0x0000000005FC8000-memory.dmp

Filesize
3.4MB

Download
memory/2304-2-0x0000000074080000-0x000000007476E000-memory.dmp

Filesize
6.9MB

Download
memory/2304-3-0x000000007408E000-0x000000007408F000-memory.dmp

Filesize
4KB

Download
memory/2844-42-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2880-8-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/2880-11-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/2880-17-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/2880-21-0x0000000074080000-0x000000007476E000-memory.dmp

Filesize
6.9MB

Download
memory/2880-9-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/2880-23-0x0000000074080000-0x000000007476E000-memory.dmp

Filesize
6.9MB

Download
memory/2880-7-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/2880-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2880-15-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/2880-31-0x0000000074080000-0x000000007476E000-memory.dmp

Filesize
6.9MB

Download
memory/2880-20-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/2896-32-0x0000000000C60000-0x0000000000FF0000-memory.dmp

Filesize
3.6MB

Download
memory/2896-33-0x00000000003E0000-0x00000000003F2000-memory.dmp

Filesize
72KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads