quasar | 68cbdca0e0174a509f79c50d35c832b20578e0ff63a14e8dd26073b974a8909f

Analysis

max time kernel
94s
max time network
143s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-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 1 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3268-11-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar

Executes dropped EXE 2 IoCs

Processes:

outlook.exeoutlook.exe

pid	Process
748	outlook.exe
4760	outlook.exe

Suspicious use of SetThreadContext 2 IoCs

Processes:

90df3fa2c8b6470115f4f8a4ac955bfa35b07ac6d4d796da6f99c89dbb1820a0.exeoutlook.exe

description	pid	Process	procid_target
PID 4296 set thread context of 3268	4296	90df3fa2c8b6470115f4f8a4ac955bfa35b07ac6d4d796da6f99c89dbb1820a0.exe	96
PID 748 set thread context of 4760	748	outlook.exe	101

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:

90df3fa2c8b6470115f4f8a4ac955bfa35b07ac6d4d796da6f99c89dbb1820a0.exeschtasks.exeoutlook.exeoutlook.exeschtasks.exe90df3fa2c8b6470115f4f8a4ac955bfa35b07ac6d4d796da6f99c89dbb1820a0.exe

description	ioc	Process
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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	outlook.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	90df3fa2c8b6470115f4f8a4ac955bfa35b07ac6d4d796da6f99c89dbb1820a0.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
4492	schtasks.exe
3452	schtasks.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

Processes:

90df3fa2c8b6470115f4f8a4ac955bfa35b07ac6d4d796da6f99c89dbb1820a0.exe

pid	Process
4296	90df3fa2c8b6470115f4f8a4ac955bfa35b07ac6d4d796da6f99c89dbb1820a0.exe
4296	90df3fa2c8b6470115f4f8a4ac955bfa35b07ac6d4d796da6f99c89dbb1820a0.exe
4296	90df3fa2c8b6470115f4f8a4ac955bfa35b07ac6d4d796da6f99c89dbb1820a0.exe
4296	90df3fa2c8b6470115f4f8a4ac955bfa35b07ac6d4d796da6f99c89dbb1820a0.exe
4296	90df3fa2c8b6470115f4f8a4ac955bfa35b07ac6d4d796da6f99c89dbb1820a0.exe
4296	90df3fa2c8b6470115f4f8a4ac955bfa35b07ac6d4d796da6f99c89dbb1820a0.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

90df3fa2c8b6470115f4f8a4ac955bfa35b07ac6d4d796da6f99c89dbb1820a0.exe90df3fa2c8b6470115f4f8a4ac955bfa35b07ac6d4d796da6f99c89dbb1820a0.exeoutlook.exe

description	pid	Process
Token: SeDebugPrivilege	4296	90df3fa2c8b6470115f4f8a4ac955bfa35b07ac6d4d796da6f99c89dbb1820a0.exe
Token: SeDebugPrivilege	3268	90df3fa2c8b6470115f4f8a4ac955bfa35b07ac6d4d796da6f99c89dbb1820a0.exe
Token: SeDebugPrivilege	4760	outlook.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

outlook.exe

pid	Process
4760	outlook.exe

Suspicious use of WriteProcessMemory 34 IoCs

Processes:

90df3fa2c8b6470115f4f8a4ac955bfa35b07ac6d4d796da6f99c89dbb1820a0.exe90df3fa2c8b6470115f4f8a4ac955bfa35b07ac6d4d796da6f99c89dbb1820a0.exeoutlook.exeoutlook.exe

description	pid	Process	procid_target
PID 4296 wrote to memory of 4336	4296	90df3fa2c8b6470115f4f8a4ac955bfa35b07ac6d4d796da6f99c89dbb1820a0.exe	93
PID 4296 wrote to memory of 4336	4296	90df3fa2c8b6470115f4f8a4ac955bfa35b07ac6d4d796da6f99c89dbb1820a0.exe	93
PID 4296 wrote to memory of 4336	4296	90df3fa2c8b6470115f4f8a4ac955bfa35b07ac6d4d796da6f99c89dbb1820a0.exe	93
PID 4296 wrote to memory of 3340	4296	90df3fa2c8b6470115f4f8a4ac955bfa35b07ac6d4d796da6f99c89dbb1820a0.exe	94
PID 4296 wrote to memory of 3340	4296	90df3fa2c8b6470115f4f8a4ac955bfa35b07ac6d4d796da6f99c89dbb1820a0.exe	94
PID 4296 wrote to memory of 3340	4296	90df3fa2c8b6470115f4f8a4ac955bfa35b07ac6d4d796da6f99c89dbb1820a0.exe	94
PID 4296 wrote to memory of 2836	4296	90df3fa2c8b6470115f4f8a4ac955bfa35b07ac6d4d796da6f99c89dbb1820a0.exe	95
PID 4296 wrote to memory of 2836	4296	90df3fa2c8b6470115f4f8a4ac955bfa35b07ac6d4d796da6f99c89dbb1820a0.exe	95
PID 4296 wrote to memory of 2836	4296	90df3fa2c8b6470115f4f8a4ac955bfa35b07ac6d4d796da6f99c89dbb1820a0.exe	95
PID 4296 wrote to memory of 3268	4296	90df3fa2c8b6470115f4f8a4ac955bfa35b07ac6d4d796da6f99c89dbb1820a0.exe	96
PID 4296 wrote to memory of 3268	4296	90df3fa2c8b6470115f4f8a4ac955bfa35b07ac6d4d796da6f99c89dbb1820a0.exe	96
PID 4296 wrote to memory of 3268	4296	90df3fa2c8b6470115f4f8a4ac955bfa35b07ac6d4d796da6f99c89dbb1820a0.exe	96
PID 4296 wrote to memory of 3268	4296	90df3fa2c8b6470115f4f8a4ac955bfa35b07ac6d4d796da6f99c89dbb1820a0.exe	96
PID 4296 wrote to memory of 3268	4296	90df3fa2c8b6470115f4f8a4ac955bfa35b07ac6d4d796da6f99c89dbb1820a0.exe	96
PID 4296 wrote to memory of 3268	4296	90df3fa2c8b6470115f4f8a4ac955bfa35b07ac6d4d796da6f99c89dbb1820a0.exe	96
PID 4296 wrote to memory of 3268	4296	90df3fa2c8b6470115f4f8a4ac955bfa35b07ac6d4d796da6f99c89dbb1820a0.exe	96
PID 4296 wrote to memory of 3268	4296	90df3fa2c8b6470115f4f8a4ac955bfa35b07ac6d4d796da6f99c89dbb1820a0.exe	96
PID 3268 wrote to memory of 4492	3268	90df3fa2c8b6470115f4f8a4ac955bfa35b07ac6d4d796da6f99c89dbb1820a0.exe	97
PID 3268 wrote to memory of 4492	3268	90df3fa2c8b6470115f4f8a4ac955bfa35b07ac6d4d796da6f99c89dbb1820a0.exe	97
PID 3268 wrote to memory of 4492	3268	90df3fa2c8b6470115f4f8a4ac955bfa35b07ac6d4d796da6f99c89dbb1820a0.exe	97
PID 3268 wrote to memory of 748	3268	90df3fa2c8b6470115f4f8a4ac955bfa35b07ac6d4d796da6f99c89dbb1820a0.exe	99
PID 3268 wrote to memory of 748	3268	90df3fa2c8b6470115f4f8a4ac955bfa35b07ac6d4d796da6f99c89dbb1820a0.exe	99
PID 3268 wrote to memory of 748	3268	90df3fa2c8b6470115f4f8a4ac955bfa35b07ac6d4d796da6f99c89dbb1820a0.exe	99
PID 748 wrote to memory of 4760	748	outlook.exe	101
PID 748 wrote to memory of 4760	748	outlook.exe	101
PID 748 wrote to memory of 4760	748	outlook.exe	101
PID 748 wrote to memory of 4760	748	outlook.exe	101
PID 748 wrote to memory of 4760	748	outlook.exe	101
PID 748 wrote to memory of 4760	748	outlook.exe	101
PID 748 wrote to memory of 4760	748	outlook.exe	101
PID 748 wrote to memory of 4760	748	outlook.exe	101
PID 4760 wrote to memory of 3452	4760	outlook.exe	102
PID 4760 wrote to memory of 3452	4760	outlook.exe	102
PID 4760 wrote to memory of 3452	4760	outlook.exe	102

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 behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4296
- C:\Users\Admin\AppData\Local\Temp\90df3fa2c8b6470115f4f8a4ac955bfa35b07ac6d4d796da6f99c89dbb1820a0.exe
  "C:\Users\Admin\AppData\Local\Temp\90df3fa2c8b6470115f4f8a4ac955bfa35b07ac6d4d796da6f99c89dbb1820a0.exe"
  2⤵
  PID:4336
- C:\Users\Admin\AppData\Local\Temp\90df3fa2c8b6470115f4f8a4ac955bfa35b07ac6d4d796da6f99c89dbb1820a0.exe
  "C:\Users\Admin\AppData\Local\Temp\90df3fa2c8b6470115f4f8a4ac955bfa35b07ac6d4d796da6f99c89dbb1820a0.exe"
  2⤵
  PID:3340
- C:\Users\Admin\AppData\Local\Temp\90df3fa2c8b6470115f4f8a4ac955bfa35b07ac6d4d796da6f99c89dbb1820a0.exe
  "C:\Users\Admin\AppData\Local\Temp\90df3fa2c8b6470115f4f8a4ac955bfa35b07ac6d4d796da6f99c89dbb1820a0.exe"
  2⤵
  PID:2836
- C:\Users\Admin\AppData\Local\Temp\90df3fa2c8b6470115f4f8a4ac955bfa35b07ac6d4d796da6f99c89dbb1820a0.exe
  "C:\Users\Admin\AppData\Local\Temp\90df3fa2c8b6470115f4f8a4ac955bfa35b07ac6d4d796da6f99c89dbb1820a0.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3268
- - 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:4492
- - C:\Users\Admin\AppData\Roaming\WindowsUpdate\outlook.exe
    "C:\Users\Admin\AppData\Roaming\WindowsUpdate\outlook.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:748
  - - C:\Users\Admin\AppData\Roaming\WindowsUpdate\outlook.exe
      "C:\Users\Admin\AppData\Roaming\WindowsUpdate\outlook.exe"
      4⤵
      Executes dropped EXE
      System Location Discovery: System Language Discovery
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of SetWindowsHookEx
      Suspicious use of WriteProcessMemory
      PID:4760
    - - C:\Windows\SysWOW64\schtasks.exe
        
        "schtasks" /create /tn "Outlook" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\WindowsUpdate\outlook.exe" /rl HIGHEST /f
        5⤵
        System Location Discovery: System Language Discovery
        Scheduled Task/Job: Scheduled Task
        
        PID:3452

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\90df3fa2c8b6470115f4f8a4ac955bfa35b07ac6d4d796da6f99c89dbb1820a0.exe.log

Filesize
1KB

MD5
8ec831f3e3a3f77e4a7b9cd32b48384c

SHA1
d83f09fd87c5bd86e045873c231c14836e76a05c

SHA256
7667e538030e3f8ce2886e47a01af24cb0ea70528b1e821c5d8832c5076cb982

SHA512
26bffa2406b66368bd412bf25869a792631455645992cdcade2dbc13a2e56fb546414a6a9223b94c96c38d89187add6678d4779a88b38b0c9e36be8527b213c3

Download Submit
C:\Users\Admin\AppData\Roaming\WindowsUpdate\outlook.exe

Filesize
3.7MB

MD5
67eea4de4c8b5f49ee6feb688c0060c7

SHA1
fd390e9e0ef5c59ff4750f74a1770da2c3ef993d

SHA256
90df3fa2c8b6470115f4f8a4ac955bfa35b07ac6d4d796da6f99c89dbb1820a0

SHA512
df9ff675ea6fae9b26a1e0aa6085d674012d44f057c8669ac469b55c5f3a3565c9c4abec7f8b87ea653751db51e6ee219b17b5d45a5a52c1d33ff4c0df86fc4f

Download Submit
memory/748-28-0x00000000746D0000-0x0000000074E80000-memory.dmp

Filesize
7.7MB

Download
memory/748-24-0x00000000746D0000-0x0000000074E80000-memory.dmp

Filesize
7.7MB

Download
memory/748-22-0x00000000746D0000-0x0000000074E80000-memory.dmp

Filesize
7.7MB

Download
memory/3268-23-0x00000000746D0000-0x0000000074E80000-memory.dmp

Filesize
7.7MB

Download
memory/3268-11-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/3268-16-0x00000000746D0000-0x0000000074E80000-memory.dmp

Filesize
7.7MB

Download
memory/3268-14-0x00000000746D0000-0x0000000074E80000-memory.dmp

Filesize
7.7MB

Download
memory/4296-4-0x00000000746D0000-0x0000000074E80000-memory.dmp

Filesize
7.7MB

Download
memory/4296-0-0x00000000746DE000-0x00000000746DF000-memory.dmp

Filesize
4KB

Download
memory/4296-9-0x00000000746D0000-0x0000000074E80000-memory.dmp

Filesize
7.7MB

Download
memory/4296-5-0x00000000057F0000-0x00000000057FA000-memory.dmp

Filesize
40KB

Download
memory/4296-8-0x00000000746DE000-0x00000000746DF000-memory.dmp

Filesize
4KB

Download
memory/4296-15-0x00000000746D0000-0x0000000074E80000-memory.dmp

Filesize
7.7MB

Download
memory/4296-7-0x0000000006860000-0x000000000687C000-memory.dmp

Filesize
112KB

Download
memory/4296-6-0x00000000058B0000-0x000000000594C000-memory.dmp

Filesize
624KB

Download
memory/4296-3-0x0000000005620000-0x00000000056B2000-memory.dmp

Filesize
584KB

Download
memory/4296-10-0x00000000095C0000-0x0000000009926000-memory.dmp

Filesize
3.4MB

Download
memory/4296-2-0x0000000005C90000-0x0000000006234000-memory.dmp

Filesize
5.6MB

Download
memory/4296-1-0x00000000008A0000-0x0000000000C56000-memory.dmp

Filesize
3.7MB

Download
memory/4760-29-0x0000000006B10000-0x0000000007128000-memory.dmp

Filesize
6.1MB

Download
memory/4760-30-0x0000000006660000-0x00000000066B0000-memory.dmp

Filesize
320KB

Download
memory/4760-31-0x00000000068D0000-0x0000000006982000-memory.dmp

Filesize
712KB

Download
memory/4760-34-0x0000000008030000-0x0000000008042000-memory.dmp

Filesize
72KB

Download
memory/4760-35-0x0000000008090000-0x00000000080CC000-memory.dmp

Filesize
240KB

Download
memory/4760-36-0x0000000008140000-0x00000000081A6000-memory.dmp

Filesize
408KB

Download