quasar | e14c8cd3613b5d94cd5ca407fd329b61954add690c779edbd41b362d035f7879

Analysis

max time kernel
133s
max time network
144s
platform
windows7_x64
resource
win7-20241023-en
resource tags

arch:x64arch:x86image:win7-20241023-enlocale:en-usos:windows7-x64system
submitted
03-12-2024 13:06

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General

Target

Nowezamwienie-0072291855.pdf243KB.com.exe
Size

3.7MB
MD5

96493f8a0252e4e492de924d83db5a8a
SHA1

09dad264469e86a858f0183ed6e5bfe2d53781f4
SHA256

e14c8cd3613b5d94cd5ca407fd329b61954add690c779edbd41b362d035f7879
SHA512

29d6192b4aae0af83fe15d015be5cf3e1b8832e154c6e847d71de1834c30421f435192490fc9f5b868c99e71f2bbdb92685582985ece2e7694d02799cd315b78
SSDEEP

49152:wBeT66BYzsKDeAo4hJFXMOqlI9XGhvPEpCaZKfpObuLkEnmnK0QnFRhe5+ET8QVY:TTF7GbIlDvPEpz4ptnHhK87nhUnIJb

Score

10^/10

quasar jekwu discovery execution spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

JEKWU

Zyg.ydns.eu:5829

Opy.ydns.eu:5829

Mutex

9c58b2ba-07eb-415a-b48b-21bbb68d32285e

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/3044-29-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar
behavioral1/memory/3044-23-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar
behavioral1/memory/3044-31-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar
behavioral1/memory/3044-28-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar
behavioral1/memory/3044-25-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar

Command and Scripting Interpreter: PowerShell 1 TTPs 4 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

Processes:

powershell.exepowershell.exepowershell.exepowershell.exe

pid	Process
2232	powershell.exe
2880	powershell.exe
2936	powershell.exe
2144	powershell.exe

Executes dropped EXE 2 IoCs

Processes:

outlooks.exeoutlooks.exe

pid	Process
1696	outlooks.exe
2276	outlooks.exe

Loads dropped DLL 1 IoCs

Processes:

Nowezamwienie-0072291855.pdf243KB.com.exe

pid	Process
3044	Nowezamwienie-0072291855.pdf243KB.com.exe

Suspicious use of SetThreadContext 2 IoCs

Processes:

Nowezamwienie-0072291855.pdf243KB.com.exeoutlooks.exe

description	pid	Process	procid_target
PID 2084 set thread context of 3044	2084	Nowezamwienie-0072291855.pdf243KB.com.exe	37
PID 1696 set thread context of 2276	1696	outlooks.exe	47

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 12 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.exeschtasks.exeschtasks.exeNowezamwienie-0072291855.pdf243KB.com.exepowershell.exeNowezamwienie-0072291855.pdf243KB.com.exeschtasks.exeoutlooks.exepowershell.exepowershell.exeoutlooks.exepowershell.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Nowezamwienie-0072291855.pdf243KB.com.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Nowezamwienie-0072291855.pdf243KB.com.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	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	outlooks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 4 IoCs

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

persistence execution

Scheduled Task

T1053.005

Processes:

schtasks.exeschtasks.exeschtasks.exeschtasks.exe

pid	Process
2992	schtasks.exe
1924	schtasks.exe
1804	schtasks.exe
860	schtasks.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

powershell.exepowershell.exepowershell.exepowershell.exe

pid	Process
2232	powershell.exe
2880	powershell.exe
2936	powershell.exe
2144	powershell.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

Processes:

powershell.exepowershell.exeNowezamwienie-0072291855.pdf243KB.com.exepowershell.exepowershell.exeoutlooks.exe

description	pid	Process
Token: SeDebugPrivilege	2232	powershell.exe
Token: SeDebugPrivilege	2880	powershell.exe
Token: SeDebugPrivilege	3044	Nowezamwienie-0072291855.pdf243KB.com.exe
Token: SeDebugPrivilege	2936	powershell.exe
Token: SeDebugPrivilege	2144	powershell.exe
Token: SeDebugPrivilege	2276	outlooks.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

outlooks.exe

pid	Process
2276	outlooks.exe

Suspicious use of WriteProcessMemory 54 IoCs

Processes:

Nowezamwienie-0072291855.pdf243KB.com.exeNowezamwienie-0072291855.pdf243KB.com.exeoutlooks.exeoutlooks.exe

description	pid	Process	procid_target
PID 2084 wrote to memory of 2232	2084	Nowezamwienie-0072291855.pdf243KB.com.exe	31
PID 2084 wrote to memory of 2232	2084	Nowezamwienie-0072291855.pdf243KB.com.exe	31
PID 2084 wrote to memory of 2232	2084	Nowezamwienie-0072291855.pdf243KB.com.exe	31
PID 2084 wrote to memory of 2232	2084	Nowezamwienie-0072291855.pdf243KB.com.exe	31
PID 2084 wrote to memory of 2880	2084	Nowezamwienie-0072291855.pdf243KB.com.exe	33
PID 2084 wrote to memory of 2880	2084	Nowezamwienie-0072291855.pdf243KB.com.exe	33
PID 2084 wrote to memory of 2880	2084	Nowezamwienie-0072291855.pdf243KB.com.exe	33
PID 2084 wrote to memory of 2880	2084	Nowezamwienie-0072291855.pdf243KB.com.exe	33
PID 2084 wrote to memory of 2992	2084	Nowezamwienie-0072291855.pdf243KB.com.exe	35
PID 2084 wrote to memory of 2992	2084	Nowezamwienie-0072291855.pdf243KB.com.exe	35
PID 2084 wrote to memory of 2992	2084	Nowezamwienie-0072291855.pdf243KB.com.exe	35
PID 2084 wrote to memory of 2992	2084	Nowezamwienie-0072291855.pdf243KB.com.exe	35
PID 2084 wrote to memory of 3044	2084	Nowezamwienie-0072291855.pdf243KB.com.exe	37
PID 2084 wrote to memory of 3044	2084	Nowezamwienie-0072291855.pdf243KB.com.exe	37
PID 2084 wrote to memory of 3044	2084	Nowezamwienie-0072291855.pdf243KB.com.exe	37
PID 2084 wrote to memory of 3044	2084	Nowezamwienie-0072291855.pdf243KB.com.exe	37
PID 2084 wrote to memory of 3044	2084	Nowezamwienie-0072291855.pdf243KB.com.exe	37
PID 2084 wrote to memory of 3044	2084	Nowezamwienie-0072291855.pdf243KB.com.exe	37
PID 2084 wrote to memory of 3044	2084	Nowezamwienie-0072291855.pdf243KB.com.exe	37
PID 2084 wrote to memory of 3044	2084	Nowezamwienie-0072291855.pdf243KB.com.exe	37
PID 2084 wrote to memory of 3044	2084	Nowezamwienie-0072291855.pdf243KB.com.exe	37
PID 3044 wrote to memory of 1924	3044	Nowezamwienie-0072291855.pdf243KB.com.exe	38
PID 3044 wrote to memory of 1924	3044	Nowezamwienie-0072291855.pdf243KB.com.exe	38
PID 3044 wrote to memory of 1924	3044	Nowezamwienie-0072291855.pdf243KB.com.exe	38
PID 3044 wrote to memory of 1924	3044	Nowezamwienie-0072291855.pdf243KB.com.exe	38
PID 3044 wrote to memory of 1696	3044	Nowezamwienie-0072291855.pdf243KB.com.exe	40
PID 3044 wrote to memory of 1696	3044	Nowezamwienie-0072291855.pdf243KB.com.exe	40
PID 3044 wrote to memory of 1696	3044	Nowezamwienie-0072291855.pdf243KB.com.exe	40
PID 3044 wrote to memory of 1696	3044	Nowezamwienie-0072291855.pdf243KB.com.exe	40
PID 1696 wrote to memory of 2936	1696	outlooks.exe	41
PID 1696 wrote to memory of 2936	1696	outlooks.exe	41
PID 1696 wrote to memory of 2936	1696	outlooks.exe	41
PID 1696 wrote to memory of 2936	1696	outlooks.exe	41
PID 1696 wrote to memory of 2144	1696	outlooks.exe	43
PID 1696 wrote to memory of 2144	1696	outlooks.exe	43
PID 1696 wrote to memory of 2144	1696	outlooks.exe	43
PID 1696 wrote to memory of 2144	1696	outlooks.exe	43
PID 1696 wrote to memory of 1804	1696	outlooks.exe	44
PID 1696 wrote to memory of 1804	1696	outlooks.exe	44
PID 1696 wrote to memory of 1804	1696	outlooks.exe	44
PID 1696 wrote to memory of 1804	1696	outlooks.exe	44
PID 1696 wrote to memory of 2276	1696	outlooks.exe	47
PID 1696 wrote to memory of 2276	1696	outlooks.exe	47
PID 1696 wrote to memory of 2276	1696	outlooks.exe	47
PID 1696 wrote to memory of 2276	1696	outlooks.exe	47
PID 1696 wrote to memory of 2276	1696	outlooks.exe	47
PID 1696 wrote to memory of 2276	1696	outlooks.exe	47
PID 1696 wrote to memory of 2276	1696	outlooks.exe	47
PID 1696 wrote to memory of 2276	1696	outlooks.exe	47
PID 1696 wrote to memory of 2276	1696	outlooks.exe	47
PID 2276 wrote to memory of 860	2276	outlooks.exe	48
PID 2276 wrote to memory of 860	2276	outlooks.exe	48
PID 2276 wrote to memory of 860	2276	outlooks.exe	48
PID 2276 wrote to memory of 860	2276	outlooks.exe	48

C:\Users\Admin\AppData\Local\Temp\Nowezamwienie-0072291855.pdf243KB.com.exe
"C:\Users\Admin\AppData\Local\Temp\Nowezamwienie-0072291855.pdf243KB.com.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2084
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\Nowezamwienie-0072291855.pdf243KB.com.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2232
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\EPhabVgXw.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2880
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\EPhabVgXw" /XML "C:\Users\Admin\AppData\Local\Temp\tmpEC71.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:2992
- C:\Users\Admin\AppData\Local\Temp\Nowezamwienie-0072291855.pdf243KB.com.exe
  "C:\Users\Admin\AppData\Local\Temp\Nowezamwienie-0072291855.pdf243KB.com.exe"
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3044
- - 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:1924
- - 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:1696
  - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\WindowsUpdates\outlooks.exe"
      4⤵
      Command and Scripting Interpreter: PowerShell
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:2936
  - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\EPhabVgXw.exe"
      4⤵
      Command and Scripting Interpreter: PowerShell
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:2144
  - - C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\EPhabVgXw" /XML "C:\Users\Admin\AppData\Local\Temp\tmp319B.tmp"
      4⤵
      System Location Discovery: System Language Discovery
      Scheduled Task/Job: Scheduled Task
      PID:1804
  - - 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:2276
    - - 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:860

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

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 Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmpEC71.tmp

Filesize
1KB

MD5
f7355454e324429f6b763e191bf6f3fd

SHA1
5bd66febd6c621634591088b558c3ff38bebe3ce

SHA256
0c6850bc221a9b15e60d52c21c39ecdb3640e2c0d0dba7459f24e510fd26f451

SHA512
d8d98986ba02b6d49e70cc4d4a7fac7619fc4b5c31f9933c00c914ad8410b5819791511ab57b6acd95539f863e845295b1f473186c3a7c013ee575d7d8f66c56

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\d93f411851d7c929.customDestinations-ms

Filesize
7KB

MD5
4baa3791876720599987f2c57b0827d3

SHA1
77e5ac2910ec282383e288da0a2adb4a280de63d

SHA256
02d4331a972cf2b1fb363c19a81d74dbde22cba93c20aa9adb1296d66b439e62

SHA512
70386f4653ba8e3d2e45f1bca1b10670cc2d203860e0e8318ed4dca17d20a412446913c6a936d67522165cf2915eae347070e71dc11eb1e57a00e28ca9c84115

Download Submit
\??\PIPE\srvsvc

MD5
d41d8cd98f00b204e9800998ecf8427e

SHA1
da39a3ee5e6b4b0d3255bfef95601890afd80709

SHA256
e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

SHA512
cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

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

Filesize
3.7MB

MD5
96493f8a0252e4e492de924d83db5a8a

SHA1
09dad264469e86a858f0183ed6e5bfe2d53781f4

SHA256
e14c8cd3613b5d94cd5ca407fd329b61954add690c779edbd41b362d035f7879

SHA512
29d6192b4aae0af83fe15d015be5cf3e1b8832e154c6e847d71de1834c30421f435192490fc9f5b868c99e71f2bbdb92685582985ece2e7694d02799cd315b78

Download Submit
memory/1696-40-0x0000000001180000-0x000000000152C000-memory.dmp

Filesize
3.7MB

Download
memory/2084-6-0x0000000007C60000-0x0000000007FC8000-memory.dmp

Filesize
3.4MB

Download
memory/2084-5-0x0000000074B80000-0x000000007526E000-memory.dmp

Filesize
6.9MB

Download
memory/2084-4-0x0000000074B8E000-0x0000000074B8F000-memory.dmp

Filesize
4KB

Download
memory/2084-3-0x00000000006D0000-0x00000000006E8000-memory.dmp

Filesize
96KB

Download
memory/2084-0-0x0000000074B8E000-0x0000000074B8F000-memory.dmp

Filesize
4KB

Download
memory/2084-2-0x0000000074B80000-0x000000007526E000-memory.dmp

Filesize
6.9MB

Download
memory/2084-32-0x0000000074B80000-0x000000007526E000-memory.dmp

Filesize
6.9MB

Download
memory/2084-1-0x0000000000CA0000-0x000000000104C000-memory.dmp

Filesize
3.7MB

Download
memory/2276-62-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/3044-29-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/3044-27-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/3044-25-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/3044-21-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/3044-28-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/3044-31-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/3044-23-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/3044-20-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download