quasar | ce17ceabb0271fc086f17eeda13a42934aeb9122bf89dcdc50ee9490f515c0e5

Analysis

max time kernel
94s
max time network
140s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
20-11-2024 15:54

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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

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 1 IoCs

resource	yara_rule
behavioral2/memory/1504-11-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar

Executes dropped EXE 3 IoCs

pid	Process
3748	outlooks.exe
2944	outlooks.exe
1784	outlooks.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4100 set thread context of 1504	4100	KRcLFIz5PCQunB7.exe	96
PID 3748 set thread context of 1784	3748	outlooks.exe	104

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

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

pid	Process
1596	schtasks.exe
4360	schtasks.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4100	KRcLFIz5PCQunB7.exe
4100	KRcLFIz5PCQunB7.exe
3748	outlooks.exe
3748	outlooks.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	4100	KRcLFIz5PCQunB7.exe
Token: SeDebugPrivilege	1504	KRcLFIz5PCQunB7.exe
Token: SeDebugPrivilege	3748	outlooks.exe
Token: SeDebugPrivilege	1784	outlooks.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1784	outlooks.exe

Suspicious use of WriteProcessMemory 31 IoCs

description	pid	Process	procid_target
PID 4100 wrote to memory of 780	4100	KRcLFIz5PCQunB7.exe	95
PID 4100 wrote to memory of 780	4100	KRcLFIz5PCQunB7.exe	95
PID 4100 wrote to memory of 780	4100	KRcLFIz5PCQunB7.exe	95
PID 4100 wrote to memory of 1504	4100	KRcLFIz5PCQunB7.exe	96
PID 4100 wrote to memory of 1504	4100	KRcLFIz5PCQunB7.exe	96
PID 4100 wrote to memory of 1504	4100	KRcLFIz5PCQunB7.exe	96
PID 4100 wrote to memory of 1504	4100	KRcLFIz5PCQunB7.exe	96
PID 4100 wrote to memory of 1504	4100	KRcLFIz5PCQunB7.exe	96
PID 4100 wrote to memory of 1504	4100	KRcLFIz5PCQunB7.exe	96
PID 4100 wrote to memory of 1504	4100	KRcLFIz5PCQunB7.exe	96
PID 4100 wrote to memory of 1504	4100	KRcLFIz5PCQunB7.exe	96
PID 1504 wrote to memory of 1596	1504	KRcLFIz5PCQunB7.exe	97
PID 1504 wrote to memory of 1596	1504	KRcLFIz5PCQunB7.exe	97
PID 1504 wrote to memory of 1596	1504	KRcLFIz5PCQunB7.exe	97
PID 1504 wrote to memory of 3748	1504	KRcLFIz5PCQunB7.exe	99
PID 1504 wrote to memory of 3748	1504	KRcLFIz5PCQunB7.exe	99
PID 1504 wrote to memory of 3748	1504	KRcLFIz5PCQunB7.exe	99
PID 3748 wrote to memory of 2944	3748	outlooks.exe	103
PID 3748 wrote to memory of 2944	3748	outlooks.exe	103
PID 3748 wrote to memory of 2944	3748	outlooks.exe	103
PID 3748 wrote to memory of 1784	3748	outlooks.exe	104
PID 3748 wrote to memory of 1784	3748	outlooks.exe	104
PID 3748 wrote to memory of 1784	3748	outlooks.exe	104
PID 3748 wrote to memory of 1784	3748	outlooks.exe	104
PID 3748 wrote to memory of 1784	3748	outlooks.exe	104
PID 3748 wrote to memory of 1784	3748	outlooks.exe	104
PID 3748 wrote to memory of 1784	3748	outlooks.exe	104
PID 3748 wrote to memory of 1784	3748	outlooks.exe	104
PID 1784 wrote to memory of 4360	1784	outlooks.exe	105
PID 1784 wrote to memory of 4360	1784	outlooks.exe	105
PID 1784 wrote to memory of 4360	1784	outlooks.exe	105

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 behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4100
- C:\Users\Admin\AppData\Local\Temp\KRcLFIz5PCQunB7.exe
  "C:\Users\Admin\AppData\Local\Temp\KRcLFIz5PCQunB7.exe"
  2⤵
  PID:780
- C:\Users\Admin\AppData\Local\Temp\KRcLFIz5PCQunB7.exe
  "C:\Users\Admin\AppData\Local\Temp\KRcLFIz5PCQunB7.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1504
- - 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:1596
- - 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 behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:3748
  - - C:\Users\Admin\AppData\Roaming\WindowsUpdates\outlooks.exe
      "C:\Users\Admin\AppData\Roaming\WindowsUpdates\outlooks.exe"
      4⤵
      Executes dropped EXE
      PID:2944
  - - 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:1784
    - - 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:4360

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\KRcLFIz5PCQunB7.exe.log

Filesize
1KB

MD5
8ec831f3e3a3f77e4a7b9cd32b48384c

SHA1
d83f09fd87c5bd86e045873c231c14836e76a05c

SHA256
7667e538030e3f8ce2886e47a01af24cb0ea70528b1e821c5d8832c5076cb982

SHA512
26bffa2406b66368bd412bf25869a792631455645992cdcade2dbc13a2e56fb546414a6a9223b94c96c38d89187add6678d4779a88b38b0c9e36be8527b213c3

Download Submit
C:\Users\Admin\AppData\Roaming\WindowsUpdates\outlooks.exe

Filesize
3.5MB

MD5
a08b35662044abf9528c24c3f663eaed

SHA1
aee7831f263e6b83198a790d8a8948a841a600e2

SHA256
3f233256d32f8c33884510be0e50b614a35642f6ed7cb76b1f480373b548b295

SHA512
0866868cbf52999b233546348cde08c3cfcf2deef86830a319d8430e6d815a02b8438f46c944fbd9f2010d7e9fcb6f4f77db490280894b899de0afc71278b5dd

Download Submit
memory/1504-13-0x00000000749F0000-0x00000000751A0000-memory.dmp

Filesize
7.7MB

Download
memory/1504-22-0x00000000749F0000-0x00000000751A0000-memory.dmp

Filesize
7.7MB

Download
memory/1504-15-0x00000000749F0000-0x00000000751A0000-memory.dmp

Filesize
7.7MB

Download
memory/1504-11-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/1784-40-0x0000000008050000-0x00000000080B6000-memory.dmp

Filesize
408KB

Download
memory/1784-39-0x0000000007FA0000-0x0000000007FDC000-memory.dmp

Filesize
240KB

Download
memory/1784-38-0x0000000007F40000-0x0000000007F52000-memory.dmp

Filesize
72KB

Download
memory/1784-35-0x0000000006AA0000-0x0000000006B52000-memory.dmp

Filesize
712KB

Download
memory/1784-34-0x0000000006830000-0x0000000006880000-memory.dmp

Filesize
320KB

Download
memory/1784-33-0x0000000006CE0000-0x00000000072F8000-memory.dmp

Filesize
6.1MB

Download
memory/3748-26-0x0000000005960000-0x0000000005972000-memory.dmp

Filesize
72KB

Download
memory/3748-23-0x00000000749F0000-0x00000000751A0000-memory.dmp

Filesize
7.7MB

Download
memory/3748-32-0x00000000749F0000-0x00000000751A0000-memory.dmp

Filesize
7.7MB

Download
memory/3748-25-0x00000000749F0000-0x00000000751A0000-memory.dmp

Filesize
7.7MB

Download
memory/3748-24-0x00000000749F0000-0x00000000751A0000-memory.dmp

Filesize
7.7MB

Download
memory/4100-0-0x00000000749FE000-0x00000000749FF000-memory.dmp

Filesize
4KB

Download
memory/4100-7-0x00000000749FE000-0x00000000749FF000-memory.dmp

Filesize
4KB

Download
memory/4100-8-0x00000000056D0000-0x00000000056E2000-memory.dmp

Filesize
72KB

Download
memory/4100-9-0x00000000749F0000-0x00000000751A0000-memory.dmp

Filesize
7.7MB

Download
memory/4100-14-0x00000000749F0000-0x00000000751A0000-memory.dmp

Filesize
7.7MB

Download
memory/4100-10-0x0000000007790000-0x0000000007AF8000-memory.dmp

Filesize
3.4MB

Download
memory/4100-5-0x00000000054B0000-0x00000000054BA000-memory.dmp

Filesize
40KB

Download
memory/4100-6-0x0000000005770000-0x000000000580C000-memory.dmp

Filesize
624KB

Download
memory/4100-4-0x00000000749F0000-0x00000000751A0000-memory.dmp

Filesize
7.7MB

Download
memory/4100-3-0x00000000054E0000-0x0000000005572000-memory.dmp

Filesize
584KB

Download
memory/4100-2-0x00000000059F0000-0x0000000005F94000-memory.dmp

Filesize
5.6MB

Download
memory/4100-1-0x0000000000860000-0x0000000000BF0000-memory.dmp

Filesize
3.6MB

Download