quasar | 68fe78c0a8961da3a1121f95ebe63003c9a7c359edf68542d971d92632357422

Analysis

max time kernel
148s
max time network
149s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
14-01-2025 08:42

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General

Target

68fe78c0a8961da3a1121f95ebe63003c9a7c359edf68542d971d92632357422.exe
Size

3.6MB
MD5

948d8d109d5498949cb6df8ddf011187
SHA1

a34388517b5d91508739469cfcb99415a0aaeeb3
SHA256

68fe78c0a8961da3a1121f95ebe63003c9a7c359edf68542d971d92632357422
SHA512

91c910b08a0e7a759211d915ccb3d14b8c5318c3ac7fb0b8d558d4804e569c1ae7317925539e30bf5325f06c2bdc5c3bddeeb425ae37c2800709cbccaa1e4a6a
SSDEEP

49152:7REIID3HchpnsFxF091txtO9fIkT/SvVp241xdbsvhIK7Nj7ktaJA40WQv6JNnqu:7+TIxtO9fIt7xUxkt+A4Nnqy1aaW4

Score

10^/10

quasar code discovery spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

CODE

twart.myfirewall.org:9792

rency.ydns.eu:5287

wqo9.firewall-gateway.de:8841

code1.ydns.eu:5287

wqo9.firewall-gateway.de:9792

Mutex

025351e291-5d1041-4fa37-932c7-869aeiQec514992

Attributes

encryption_key
3145298725BA5E0DD56E87FFE3F8898EA81E6EDA
install_name
Exccelworkbook.exe
log_directory
Logs
reconnect_delay
6000
startup_key
pdfdocument
subdirectory
SubDir

Signatures

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

Quasar payload 5 IoCs

resource	yara_rule
behavioral1/memory/2072-11-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar
behavioral1/memory/2072-14-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar
behavioral1/memory/2072-18-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar
behavioral1/memory/2072-16-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar
behavioral1/memory/2072-10-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar

Executes dropped EXE 3 IoCs

pid	Process
2948	Exccelworkbook.exe
2248	Exccelworkbook.exe
1952	Exccelworkbook.exe

Loads dropped DLL 2 IoCs

pid	Process
2072	68fe78c0a8961da3a1121f95ebe63003c9a7c359edf68542d971d92632357422.exe
2072	68fe78c0a8961da3a1121f95ebe63003c9a7c359edf68542d971d92632357422.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2184 set thread context of 2072	2184	68fe78c0a8961da3a1121f95ebe63003c9a7c359edf68542d971d92632357422.exe	30
PID 2948 set thread context of 1952	2948	Exccelworkbook.exe	36

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	Exccelworkbook.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Exccelworkbook.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	68fe78c0a8961da3a1121f95ebe63003c9a7c359edf68542d971d92632357422.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	68fe78c0a8961da3a1121f95ebe63003c9a7c359edf68542d971d92632357422.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
2772	schtasks.exe
2952	schtasks.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2948	Exccelworkbook.exe
2948	Exccelworkbook.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2072	68fe78c0a8961da3a1121f95ebe63003c9a7c359edf68542d971d92632357422.exe
Token: SeDebugPrivilege	2948	Exccelworkbook.exe
Token: SeDebugPrivilege	1952	Exccelworkbook.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1952	Exccelworkbook.exe

Suspicious use of WriteProcessMemory 34 IoCs

description	pid	Process	procid_target
PID 2184 wrote to memory of 2072	2184	68fe78c0a8961da3a1121f95ebe63003c9a7c359edf68542d971d92632357422.exe	30
PID 2184 wrote to memory of 2072	2184	68fe78c0a8961da3a1121f95ebe63003c9a7c359edf68542d971d92632357422.exe	30
PID 2184 wrote to memory of 2072	2184	68fe78c0a8961da3a1121f95ebe63003c9a7c359edf68542d971d92632357422.exe	30
PID 2184 wrote to memory of 2072	2184	68fe78c0a8961da3a1121f95ebe63003c9a7c359edf68542d971d92632357422.exe	30
PID 2184 wrote to memory of 2072	2184	68fe78c0a8961da3a1121f95ebe63003c9a7c359edf68542d971d92632357422.exe	30
PID 2184 wrote to memory of 2072	2184	68fe78c0a8961da3a1121f95ebe63003c9a7c359edf68542d971d92632357422.exe	30
PID 2184 wrote to memory of 2072	2184	68fe78c0a8961da3a1121f95ebe63003c9a7c359edf68542d971d92632357422.exe	30
PID 2184 wrote to memory of 2072	2184	68fe78c0a8961da3a1121f95ebe63003c9a7c359edf68542d971d92632357422.exe	30
PID 2184 wrote to memory of 2072	2184	68fe78c0a8961da3a1121f95ebe63003c9a7c359edf68542d971d92632357422.exe	30
PID 2072 wrote to memory of 2772	2072	68fe78c0a8961da3a1121f95ebe63003c9a7c359edf68542d971d92632357422.exe	32
PID 2072 wrote to memory of 2772	2072	68fe78c0a8961da3a1121f95ebe63003c9a7c359edf68542d971d92632357422.exe	32
PID 2072 wrote to memory of 2772	2072	68fe78c0a8961da3a1121f95ebe63003c9a7c359edf68542d971d92632357422.exe	32
PID 2072 wrote to memory of 2772	2072	68fe78c0a8961da3a1121f95ebe63003c9a7c359edf68542d971d92632357422.exe	32
PID 2072 wrote to memory of 2948	2072	68fe78c0a8961da3a1121f95ebe63003c9a7c359edf68542d971d92632357422.exe	34
PID 2072 wrote to memory of 2948	2072	68fe78c0a8961da3a1121f95ebe63003c9a7c359edf68542d971d92632357422.exe	34
PID 2072 wrote to memory of 2948	2072	68fe78c0a8961da3a1121f95ebe63003c9a7c359edf68542d971d92632357422.exe	34
PID 2072 wrote to memory of 2948	2072	68fe78c0a8961da3a1121f95ebe63003c9a7c359edf68542d971d92632357422.exe	34
PID 2948 wrote to memory of 2248	2948	Exccelworkbook.exe	35
PID 2948 wrote to memory of 2248	2948	Exccelworkbook.exe	35
PID 2948 wrote to memory of 2248	2948	Exccelworkbook.exe	35
PID 2948 wrote to memory of 2248	2948	Exccelworkbook.exe	35
PID 2948 wrote to memory of 1952	2948	Exccelworkbook.exe	36
PID 2948 wrote to memory of 1952	2948	Exccelworkbook.exe	36
PID 2948 wrote to memory of 1952	2948	Exccelworkbook.exe	36
PID 2948 wrote to memory of 1952	2948	Exccelworkbook.exe	36
PID 2948 wrote to memory of 1952	2948	Exccelworkbook.exe	36
PID 2948 wrote to memory of 1952	2948	Exccelworkbook.exe	36
PID 2948 wrote to memory of 1952	2948	Exccelworkbook.exe	36
PID 2948 wrote to memory of 1952	2948	Exccelworkbook.exe	36
PID 2948 wrote to memory of 1952	2948	Exccelworkbook.exe	36
PID 1952 wrote to memory of 2952	1952	Exccelworkbook.exe	37
PID 1952 wrote to memory of 2952	1952	Exccelworkbook.exe	37
PID 1952 wrote to memory of 2952	1952	Exccelworkbook.exe	37
PID 1952 wrote to memory of 2952	1952	Exccelworkbook.exe	37

C:\Users\Admin\AppData\Local\Temp\68fe78c0a8961da3a1121f95ebe63003c9a7c359edf68542d971d92632357422.exe
"C:\Users\Admin\AppData\Local\Temp\68fe78c0a8961da3a1121f95ebe63003c9a7c359edf68542d971d92632357422.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2184
- C:\Users\Admin\AppData\Local\Temp\68fe78c0a8961da3a1121f95ebe63003c9a7c359edf68542d971d92632357422.exe
  "C:\Users\Admin\AppData\Local\Temp\68fe78c0a8961da3a1121f95ebe63003c9a7c359edf68542d971d92632357422.exe"
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2072
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks" /create /tn "pdfdocument" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Exccelworkbook.exe" /rl HIGHEST /f
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2772
- - C:\Users\Admin\AppData\Roaming\SubDir\Exccelworkbook.exe
    "C:\Users\Admin\AppData\Roaming\SubDir\Exccelworkbook.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:2948
  - - C:\Users\Admin\AppData\Roaming\SubDir\Exccelworkbook.exe
      "C:\Users\Admin\AppData\Roaming\SubDir\Exccelworkbook.exe"
      4⤵
      Executes dropped EXE
      PID:2248
  - - C:\Users\Admin\AppData\Roaming\SubDir\Exccelworkbook.exe
      "C:\Users\Admin\AppData\Roaming\SubDir\Exccelworkbook.exe"
      4⤵
      Executes dropped EXE
      System Location Discovery: System Language Discovery
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of SetWindowsHookEx
      Suspicious use of WriteProcessMemory
      PID:1952
    - - C:\Windows\SysWOW64\schtasks.exe
        
        "schtasks" /create /tn "pdfdocument" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Exccelworkbook.exe" /rl HIGHEST /f
        5⤵
        System Location Discovery: System Language Discovery
        Scheduled Task/Job: Scheduled Task
        
        PID:2952

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\SubDir\Exccelworkbook.exe

Filesize
3.6MB

MD5
948d8d109d5498949cb6df8ddf011187

SHA1
a34388517b5d91508739469cfcb99415a0aaeeb3

SHA256
68fe78c0a8961da3a1121f95ebe63003c9a7c359edf68542d971d92632357422

SHA512
91c910b08a0e7a759211d915ccb3d14b8c5318c3ac7fb0b8d558d4804e569c1ae7317925539e30bf5325f06c2bdc5c3bddeeb425ae37c2800709cbccaa1e4a6a

Download Submit
memory/1952-43-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2072-7-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/2072-16-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/2072-32-0x0000000074500000-0x0000000074BEE000-memory.dmp

Filesize
6.9MB

Download
memory/2072-20-0x0000000074500000-0x0000000074BEE000-memory.dmp

Filesize
6.9MB

Download
memory/2072-9-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/2072-11-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/2072-14-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/2072-18-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/2072-19-0x0000000074500000-0x0000000074BEE000-memory.dmp

Filesize
6.9MB

Download
memory/2072-10-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/2072-12-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2184-3-0x00000000009A0000-0x00000000009BA000-memory.dmp

Filesize
104KB

Download
memory/2184-6-0x0000000008860000-0x0000000008BC8000-memory.dmp

Filesize
3.4MB

Download
memory/2184-0-0x000000007450E000-0x000000007450F000-memory.dmp

Filesize
4KB

Download
memory/2184-5-0x0000000074500000-0x0000000074BEE000-memory.dmp

Filesize
6.9MB

Download
memory/2184-21-0x0000000074500000-0x0000000074BEE000-memory.dmp

Filesize
6.9MB

Download
memory/2184-2-0x0000000074500000-0x0000000074BEE000-memory.dmp

Filesize
6.9MB

Download
memory/2184-4-0x000000007450E000-0x000000007450F000-memory.dmp

Filesize
4KB

Download
memory/2184-1-0x0000000001320000-0x00000000016C4000-memory.dmp

Filesize
3.6MB

Download
memory/2948-33-0x00000000013D0000-0x0000000001774000-memory.dmp

Filesize
3.6MB

Download