quasar | 68cbdca0e0174a509f79c50d35c832b20578e0ff63a14e8dd26073b974a8909f

Analysis

max time kernel
121s
max time network
122s
platform
windows7_x64
resource
win7-20241023-en
resource tags

arch:x64arch:x86image:win7-20241023-enlocale:en-usos:windows7-x64system
submitted
07-11-2024 01:26

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General

Target

90df3fa2c8b6470115f4f8a4ac955bfa35b07ac6d4d796da6f99c89dbb1820a0.exe
Size

3.7MB
MD5

67eea4de4c8b5f49ee6feb688c0060c7
SHA1

fd390e9e0ef5c59ff4750f74a1770da2c3ef993d
SHA256

90df3fa2c8b6470115f4f8a4ac955bfa35b07ac6d4d796da6f99c89dbb1820a0
SHA512

df9ff675ea6fae9b26a1e0aa6085d674012d44f057c8669ac469b55c5f3a3565c9c4abec7f8b87ea653751db51e6ee219b17b5d45a5a52c1d33ff4c0df86fc4f
SSDEEP

98304:bVQ4wA0cWyRF1FBOOvfjukPW5hrDksmz6Nlk:YyZFBNfjzYhrDY6

Score

10^/10

quasar dave discovery spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

DAVE

hoffmann3.ydns.eu:5829

bich23.ydns.eu:5829

Mutex

309db0e8-63c5-4e08-a2f3-92745d11177da5

Attributes

encryption_key
C5B555A83D127A9553D4FB1FCECB35CE8E91A447
install_name
outlook.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Outlook
subdirectory
WindowsUpdate

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/2784-15-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar
behavioral1/memory/2784-17-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar
behavioral1/memory/2784-19-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar
behavioral1/memory/2784-11-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar
behavioral1/memory/2784-12-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar

Executes dropped EXE 6 IoCs

Processes:

outlook.exeoutlook.exeoutlook.exeoutlook.exeoutlook.exeoutlook.exe

pid	Process
2788	outlook.exe
1784	outlook.exe
2864	outlook.exe
2896	outlook.exe
2708	outlook.exe
1676	outlook.exe

Loads dropped DLL 6 IoCs

Processes:

90df3fa2c8b6470115f4f8a4ac955bfa35b07ac6d4d796da6f99c89dbb1820a0.exeoutlook.exe

pid	Process
2784	90df3fa2c8b6470115f4f8a4ac955bfa35b07ac6d4d796da6f99c89dbb1820a0.exe
2788	outlook.exe
2788	outlook.exe
2788	outlook.exe
2788	outlook.exe
2788	outlook.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

90df3fa2c8b6470115f4f8a4ac955bfa35b07ac6d4d796da6f99c89dbb1820a0.exe

description	pid	Process	procid_target
PID 2816 set thread context of 2784	2816	90df3fa2c8b6470115f4f8a4ac955bfa35b07ac6d4d796da6f99c89dbb1820a0.exe	30

System Location Discovery: System Language Discovery 1 TTPs 4 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:

90df3fa2c8b6470115f4f8a4ac955bfa35b07ac6d4d796da6f99c89dbb1820a0.exe90df3fa2c8b6470115f4f8a4ac955bfa35b07ac6d4d796da6f99c89dbb1820a0.exeschtasks.exeoutlook.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	90df3fa2c8b6470115f4f8a4ac955bfa35b07ac6d4d796da6f99c89dbb1820a0.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	90df3fa2c8b6470115f4f8a4ac955bfa35b07ac6d4d796da6f99c89dbb1820a0.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	outlook.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

Processes:

schtasks.exe

pid	Process
2672	schtasks.exe

Suspicious behavior: EnumeratesProcesses 10 IoCs

Processes:

outlook.exe

pid	Process
2788	outlook.exe
2788	outlook.exe
2788	outlook.exe
2788	outlook.exe
2788	outlook.exe
2788	outlook.exe
2788	outlook.exe
2788	outlook.exe
2788	outlook.exe
2788	outlook.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

90df3fa2c8b6470115f4f8a4ac955bfa35b07ac6d4d796da6f99c89dbb1820a0.exeoutlook.exe

description	pid	Process
Token: SeDebugPrivilege	2784	90df3fa2c8b6470115f4f8a4ac955bfa35b07ac6d4d796da6f99c89dbb1820a0.exe
Token: SeDebugPrivilege	2788	outlook.exe

Suspicious use of WriteProcessMemory 55 IoCs

Processes:

90df3fa2c8b6470115f4f8a4ac955bfa35b07ac6d4d796da6f99c89dbb1820a0.exe90df3fa2c8b6470115f4f8a4ac955bfa35b07ac6d4d796da6f99c89dbb1820a0.exeoutlook.exe

description	pid	Process	procid_target
PID 2816 wrote to memory of 2784	2816	90df3fa2c8b6470115f4f8a4ac955bfa35b07ac6d4d796da6f99c89dbb1820a0.exe	30
PID 2816 wrote to memory of 2784	2816	90df3fa2c8b6470115f4f8a4ac955bfa35b07ac6d4d796da6f99c89dbb1820a0.exe	30
PID 2816 wrote to memory of 2784	2816	90df3fa2c8b6470115f4f8a4ac955bfa35b07ac6d4d796da6f99c89dbb1820a0.exe	30
PID 2816 wrote to memory of 2784	2816	90df3fa2c8b6470115f4f8a4ac955bfa35b07ac6d4d796da6f99c89dbb1820a0.exe	30
PID 2816 wrote to memory of 2784	2816	90df3fa2c8b6470115f4f8a4ac955bfa35b07ac6d4d796da6f99c89dbb1820a0.exe	30
PID 2816 wrote to memory of 2784	2816	90df3fa2c8b6470115f4f8a4ac955bfa35b07ac6d4d796da6f99c89dbb1820a0.exe	30
PID 2816 wrote to memory of 2784	2816	90df3fa2c8b6470115f4f8a4ac955bfa35b07ac6d4d796da6f99c89dbb1820a0.exe	30
PID 2816 wrote to memory of 2784	2816	90df3fa2c8b6470115f4f8a4ac955bfa35b07ac6d4d796da6f99c89dbb1820a0.exe	30
PID 2816 wrote to memory of 2784	2816	90df3fa2c8b6470115f4f8a4ac955bfa35b07ac6d4d796da6f99c89dbb1820a0.exe	30
PID 2784 wrote to memory of 2672	2784	90df3fa2c8b6470115f4f8a4ac955bfa35b07ac6d4d796da6f99c89dbb1820a0.exe	31
PID 2784 wrote to memory of 2672	2784	90df3fa2c8b6470115f4f8a4ac955bfa35b07ac6d4d796da6f99c89dbb1820a0.exe	31
PID 2784 wrote to memory of 2672	2784	90df3fa2c8b6470115f4f8a4ac955bfa35b07ac6d4d796da6f99c89dbb1820a0.exe	31
PID 2784 wrote to memory of 2672	2784	90df3fa2c8b6470115f4f8a4ac955bfa35b07ac6d4d796da6f99c89dbb1820a0.exe	31
PID 2784 wrote to memory of 2788	2784	90df3fa2c8b6470115f4f8a4ac955bfa35b07ac6d4d796da6f99c89dbb1820a0.exe	33
PID 2784 wrote to memory of 2788	2784	90df3fa2c8b6470115f4f8a4ac955bfa35b07ac6d4d796da6f99c89dbb1820a0.exe	33
PID 2784 wrote to memory of 2788	2784	90df3fa2c8b6470115f4f8a4ac955bfa35b07ac6d4d796da6f99c89dbb1820a0.exe	33
PID 2784 wrote to memory of 2788	2784	90df3fa2c8b6470115f4f8a4ac955bfa35b07ac6d4d796da6f99c89dbb1820a0.exe	33
PID 2784 wrote to memory of 2788	2784	90df3fa2c8b6470115f4f8a4ac955bfa35b07ac6d4d796da6f99c89dbb1820a0.exe	33
PID 2784 wrote to memory of 2788	2784	90df3fa2c8b6470115f4f8a4ac955bfa35b07ac6d4d796da6f99c89dbb1820a0.exe	33
PID 2784 wrote to memory of 2788	2784	90df3fa2c8b6470115f4f8a4ac955bfa35b07ac6d4d796da6f99c89dbb1820a0.exe	33
PID 2788 wrote to memory of 1784	2788	outlook.exe	35
PID 2788 wrote to memory of 1784	2788	outlook.exe	35
PID 2788 wrote to memory of 1784	2788	outlook.exe	35
PID 2788 wrote to memory of 1784	2788	outlook.exe	35
PID 2788 wrote to memory of 1784	2788	outlook.exe	35
PID 2788 wrote to memory of 1784	2788	outlook.exe	35
PID 2788 wrote to memory of 1784	2788	outlook.exe	35
PID 2788 wrote to memory of 2864	2788	outlook.exe	36
PID 2788 wrote to memory of 2864	2788	outlook.exe	36
PID 2788 wrote to memory of 2864	2788	outlook.exe	36
PID 2788 wrote to memory of 2864	2788	outlook.exe	36
PID 2788 wrote to memory of 2864	2788	outlook.exe	36
PID 2788 wrote to memory of 2864	2788	outlook.exe	36
PID 2788 wrote to memory of 2864	2788	outlook.exe	36
PID 2788 wrote to memory of 2896	2788	outlook.exe	37
PID 2788 wrote to memory of 2896	2788	outlook.exe	37
PID 2788 wrote to memory of 2896	2788	outlook.exe	37
PID 2788 wrote to memory of 2896	2788	outlook.exe	37
PID 2788 wrote to memory of 2896	2788	outlook.exe	37
PID 2788 wrote to memory of 2896	2788	outlook.exe	37
PID 2788 wrote to memory of 2896	2788	outlook.exe	37
PID 2788 wrote to memory of 2708	2788	outlook.exe	38
PID 2788 wrote to memory of 2708	2788	outlook.exe	38
PID 2788 wrote to memory of 2708	2788	outlook.exe	38
PID 2788 wrote to memory of 2708	2788	outlook.exe	38
PID 2788 wrote to memory of 2708	2788	outlook.exe	38
PID 2788 wrote to memory of 2708	2788	outlook.exe	38
PID 2788 wrote to memory of 2708	2788	outlook.exe	38
PID 2788 wrote to memory of 1676	2788	outlook.exe	39
PID 2788 wrote to memory of 1676	2788	outlook.exe	39
PID 2788 wrote to memory of 1676	2788	outlook.exe	39
PID 2788 wrote to memory of 1676	2788	outlook.exe	39
PID 2788 wrote to memory of 1676	2788	outlook.exe	39
PID 2788 wrote to memory of 1676	2788	outlook.exe	39
PID 2788 wrote to memory of 1676	2788	outlook.exe	39

C:\Users\Admin\AppData\Local\Temp\90df3fa2c8b6470115f4f8a4ac955bfa35b07ac6d4d796da6f99c89dbb1820a0.exe
"C:\Users\Admin\AppData\Local\Temp\90df3fa2c8b6470115f4f8a4ac955bfa35b07ac6d4d796da6f99c89dbb1820a0.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2816
- C:\Users\Admin\AppData\Local\Temp\90df3fa2c8b6470115f4f8a4ac955bfa35b07ac6d4d796da6f99c89dbb1820a0.exe
  "C:\Users\Admin\AppData\Local\Temp\90df3fa2c8b6470115f4f8a4ac955bfa35b07ac6d4d796da6f99c89dbb1820a0.exe"
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2784
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks" /create /tn "Outlook" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\WindowsUpdate\outlook.exe" /rl HIGHEST /f
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2672
- - C:\Users\Admin\AppData\Roaming\WindowsUpdate\outlook.exe
    "C:\Users\Admin\AppData\Roaming\WindowsUpdate\outlook.exe"
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:2788
  - - C:\Users\Admin\AppData\Roaming\WindowsUpdate\outlook.exe
      "C:\Users\Admin\AppData\Roaming\WindowsUpdate\outlook.exe"
      4⤵
      Executes dropped EXE
      PID:1784
  - - C:\Users\Admin\AppData\Roaming\WindowsUpdate\outlook.exe
      "C:\Users\Admin\AppData\Roaming\WindowsUpdate\outlook.exe"
      4⤵
      Executes dropped EXE
      PID:2864
  - - C:\Users\Admin\AppData\Roaming\WindowsUpdate\outlook.exe
      "C:\Users\Admin\AppData\Roaming\WindowsUpdate\outlook.exe"
      4⤵
      Executes dropped EXE
      PID:2896
  - - C:\Users\Admin\AppData\Roaming\WindowsUpdate\outlook.exe
      "C:\Users\Admin\AppData\Roaming\WindowsUpdate\outlook.exe"
      4⤵
      Executes dropped EXE
      PID:2708
  - - C:\Users\Admin\AppData\Roaming\WindowsUpdate\outlook.exe
      "C:\Users\Admin\AppData\Roaming\WindowsUpdate\outlook.exe"
      4⤵
      Executes dropped EXE
      PID:1676

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

\Users\Admin\AppData\Roaming\WindowsUpdate\outlook.exe

Filesize
3.7MB

MD5
67eea4de4c8b5f49ee6feb688c0060c7

SHA1
fd390e9e0ef5c59ff4750f74a1770da2c3ef993d

SHA256
90df3fa2c8b6470115f4f8a4ac955bfa35b07ac6d4d796da6f99c89dbb1820a0

SHA512
df9ff675ea6fae9b26a1e0aa6085d674012d44f057c8669ac469b55c5f3a3565c9c4abec7f8b87ea653751db51e6ee219b17b5d45a5a52c1d33ff4c0df86fc4f

Download Submit
memory/2784-12-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/2784-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2784-15-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/2784-17-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/2784-21-0x0000000073C30000-0x000000007431E000-memory.dmp

Filesize
6.9MB

Download
memory/2784-7-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/2784-20-0x0000000073C30000-0x000000007431E000-memory.dmp

Filesize
6.9MB

Download
memory/2784-30-0x0000000073C30000-0x000000007431E000-memory.dmp

Filesize
6.9MB

Download
memory/2784-11-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/2784-9-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/2784-19-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/2788-31-0x00000000003C0000-0x0000000000776000-memory.dmp

Filesize
3.7MB

Download
memory/2816-6-0x000000000B210000-0x000000000B576000-memory.dmp

Filesize
3.4MB

Download
memory/2816-1-0x0000000000DB0000-0x0000000001166000-memory.dmp

Filesize
3.7MB

Download
memory/2816-0-0x0000000073C3E000-0x0000000073C3F000-memory.dmp

Filesize
4KB

Download
memory/2816-2-0x0000000073C30000-0x000000007431E000-memory.dmp

Filesize
6.9MB

Download
memory/2816-22-0x0000000073C30000-0x000000007431E000-memory.dmp

Filesize
6.9MB

Download
memory/2816-5-0x0000000073C30000-0x000000007431E000-memory.dmp

Filesize
6.9MB

Download
memory/2816-4-0x0000000073C3E000-0x0000000073C3F000-memory.dmp

Filesize
4KB

Download
memory/2816-3-0x00000000005D0000-0x00000000005EC000-memory.dmp

Filesize
112KB

Download