quasar | cce6d7fc922f75d8a904e74b48dfbac2ecf4e332792522985422902d34100bd1

Analysis

max time kernel
92s
max time network
146s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
05-02-2025 04:18

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General

Target

cce6d7fc922f75d8a904e74b48dfbac2ecf4e332792522985422902d34100bd1.exe
Size

3.7MB
MD5

747406f007375859ebc4dc757c9bb90e
SHA1

696cb382d1dee2d26cf3618457e802f3e8279d59
SHA256

cce6d7fc922f75d8a904e74b48dfbac2ecf4e332792522985422902d34100bd1
SHA512

ce230f3db3649312484b64a3516a5d7795b654e098f2eefe4cc3c6c87649fd7a6fc1f790c858707453efc6b3481b321ec985f4fae5ed3194dfe6251713c84f09
SSDEEP

98304:SmwfsovT+Qcmk2boh1/st/k7FpdcsTL0WlECA3qb:SmwEor+QcmkHj/sC7dzA8ECA3

Score

10^/10

quasar es code discovery spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

ES CODE

twart.myfirewall.org:9792

rency.ydns.eu:5287

wqo9.firewall-gateway.de:8841

code1.ydns.eu:5287

wqo9.firewall-gateway.de:9792

Mutex

025351e291-5d1041-4fa37-932c7-8L69aeiQec514992

Attributes

encryption_key
3145298725BA5E0DD56E87FFE3F8898EA81E6EDA
install_name
Excelworkbook.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 1 IoCs

resource	yara_rule
behavioral2/memory/2928-11-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar

Executes dropped EXE 3 IoCs

pid	Process
4808	Excelworkbook.exe
3108	Excelworkbook.exe
3632	Excelworkbook.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4792 set thread context of 2928	4792	cce6d7fc922f75d8a904e74b48dfbac2ecf4e332792522985422902d34100bd1.exe	87
PID 4808 set thread context of 3632	4808	Excelworkbook.exe	95

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	cce6d7fc922f75d8a904e74b48dfbac2ecf4e332792522985422902d34100bd1.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cce6d7fc922f75d8a904e74b48dfbac2ecf4e332792522985422902d34100bd1.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Excelworkbook.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Excelworkbook.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.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
2748	schtasks.exe
4336	schtasks.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4808	Excelworkbook.exe
4808	Excelworkbook.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2928	cce6d7fc922f75d8a904e74b48dfbac2ecf4e332792522985422902d34100bd1.exe
Token: SeDebugPrivilege	4808	Excelworkbook.exe
Token: SeDebugPrivilege	3632	Excelworkbook.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3632	Excelworkbook.exe

Suspicious use of WriteProcessMemory 28 IoCs

description	pid	Process	procid_target
PID 4792 wrote to memory of 2928	4792	cce6d7fc922f75d8a904e74b48dfbac2ecf4e332792522985422902d34100bd1.exe	87
PID 4792 wrote to memory of 2928	4792	cce6d7fc922f75d8a904e74b48dfbac2ecf4e332792522985422902d34100bd1.exe	87
PID 4792 wrote to memory of 2928	4792	cce6d7fc922f75d8a904e74b48dfbac2ecf4e332792522985422902d34100bd1.exe	87
PID 4792 wrote to memory of 2928	4792	cce6d7fc922f75d8a904e74b48dfbac2ecf4e332792522985422902d34100bd1.exe	87
PID 4792 wrote to memory of 2928	4792	cce6d7fc922f75d8a904e74b48dfbac2ecf4e332792522985422902d34100bd1.exe	87
PID 4792 wrote to memory of 2928	4792	cce6d7fc922f75d8a904e74b48dfbac2ecf4e332792522985422902d34100bd1.exe	87
PID 4792 wrote to memory of 2928	4792	cce6d7fc922f75d8a904e74b48dfbac2ecf4e332792522985422902d34100bd1.exe	87
PID 4792 wrote to memory of 2928	4792	cce6d7fc922f75d8a904e74b48dfbac2ecf4e332792522985422902d34100bd1.exe	87
PID 2928 wrote to memory of 2748	2928	cce6d7fc922f75d8a904e74b48dfbac2ecf4e332792522985422902d34100bd1.exe	88
PID 2928 wrote to memory of 2748	2928	cce6d7fc922f75d8a904e74b48dfbac2ecf4e332792522985422902d34100bd1.exe	88
PID 2928 wrote to memory of 2748	2928	cce6d7fc922f75d8a904e74b48dfbac2ecf4e332792522985422902d34100bd1.exe	88
PID 2928 wrote to memory of 4808	2928	cce6d7fc922f75d8a904e74b48dfbac2ecf4e332792522985422902d34100bd1.exe	90
PID 2928 wrote to memory of 4808	2928	cce6d7fc922f75d8a904e74b48dfbac2ecf4e332792522985422902d34100bd1.exe	90
PID 2928 wrote to memory of 4808	2928	cce6d7fc922f75d8a904e74b48dfbac2ecf4e332792522985422902d34100bd1.exe	90
PID 4808 wrote to memory of 3108	4808	Excelworkbook.exe	94
PID 4808 wrote to memory of 3108	4808	Excelworkbook.exe	94
PID 4808 wrote to memory of 3108	4808	Excelworkbook.exe	94
PID 4808 wrote to memory of 3632	4808	Excelworkbook.exe	95
PID 4808 wrote to memory of 3632	4808	Excelworkbook.exe	95
PID 4808 wrote to memory of 3632	4808	Excelworkbook.exe	95
PID 4808 wrote to memory of 3632	4808	Excelworkbook.exe	95
PID 4808 wrote to memory of 3632	4808	Excelworkbook.exe	95
PID 4808 wrote to memory of 3632	4808	Excelworkbook.exe	95
PID 4808 wrote to memory of 3632	4808	Excelworkbook.exe	95
PID 4808 wrote to memory of 3632	4808	Excelworkbook.exe	95
PID 3632 wrote to memory of 4336	3632	Excelworkbook.exe	96
PID 3632 wrote to memory of 4336	3632	Excelworkbook.exe	96
PID 3632 wrote to memory of 4336	3632	Excelworkbook.exe	96

C:\Users\Admin\AppData\Local\Temp\cce6d7fc922f75d8a904e74b48dfbac2ecf4e332792522985422902d34100bd1.exe
"C:\Users\Admin\AppData\Local\Temp\cce6d7fc922f75d8a904e74b48dfbac2ecf4e332792522985422902d34100bd1.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4792
- C:\Users\Admin\AppData\Local\Temp\cce6d7fc922f75d8a904e74b48dfbac2ecf4e332792522985422902d34100bd1.exe
  "C:\Users\Admin\AppData\Local\Temp\cce6d7fc922f75d8a904e74b48dfbac2ecf4e332792522985422902d34100bd1.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2928
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks" /create /tn "pdfdocument" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Excelworkbook.exe" /rl HIGHEST /f
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2748
- - C:\Users\Admin\AppData\Roaming\SubDir\Excelworkbook.exe
    "C:\Users\Admin\AppData\Roaming\SubDir\Excelworkbook.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:4808
  - - C:\Users\Admin\AppData\Roaming\SubDir\Excelworkbook.exe
      "C:\Users\Admin\AppData\Roaming\SubDir\Excelworkbook.exe"
      4⤵
      Executes dropped EXE
      PID:3108
  - - C:\Users\Admin\AppData\Roaming\SubDir\Excelworkbook.exe
      "C:\Users\Admin\AppData\Roaming\SubDir\Excelworkbook.exe"
      4⤵
      Executes dropped EXE
      System Location Discovery: System Language Discovery
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of SetWindowsHookEx
      Suspicious use of WriteProcessMemory
      PID:3632
    - - C:\Windows\SysWOW64\schtasks.exe
        
        "schtasks" /create /tn "pdfdocument" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Excelworkbook.exe" /rl HIGHEST /f
        5⤵
        System Location Discovery: System Language Discovery
        Scheduled Task/Job: Scheduled Task
        
        PID:4336

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\cce6d7fc922f75d8a904e74b48dfbac2ecf4e332792522985422902d34100bd1.exe.log

Filesize
1KB

MD5
8ec831f3e3a3f77e4a7b9cd32b48384c

SHA1
d83f09fd87c5bd86e045873c231c14836e76a05c

SHA256
7667e538030e3f8ce2886e47a01af24cb0ea70528b1e821c5d8832c5076cb982

SHA512
26bffa2406b66368bd412bf25869a792631455645992cdcade2dbc13a2e56fb546414a6a9223b94c96c38d89187add6678d4779a88b38b0c9e36be8527b213c3

Download Submit
C:\Users\Admin\AppData\Roaming\SubDir\Excelworkbook.exe

Filesize
3.7MB

MD5
747406f007375859ebc4dc757c9bb90e

SHA1
696cb382d1dee2d26cf3618457e802f3e8279d59

SHA256
cce6d7fc922f75d8a904e74b48dfbac2ecf4e332792522985422902d34100bd1

SHA512
ce230f3db3649312484b64a3516a5d7795b654e098f2eefe4cc3c6c87649fd7a6fc1f790c858707453efc6b3481b321ec985f4fae5ed3194dfe6251713c84f09

Download Submit
memory/2928-22-0x00000000752E0000-0x0000000075A90000-memory.dmp

Filesize
7.7MB

Download
memory/2928-16-0x00000000752E0000-0x0000000075A90000-memory.dmp

Filesize
7.7MB

Download
memory/2928-14-0x00000000752E0000-0x0000000075A90000-memory.dmp

Filesize
7.7MB

Download
memory/2928-11-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/3632-38-0x0000000007DE0000-0x0000000007E46000-memory.dmp

Filesize
408KB

Download
memory/3632-37-0x0000000007D30000-0x0000000007D6C000-memory.dmp

Filesize
240KB

Download
memory/3632-36-0x0000000007CD0000-0x0000000007CE2000-memory.dmp

Filesize
72KB

Download
memory/3632-33-0x0000000006820000-0x00000000068D2000-memory.dmp

Filesize
712KB

Download
memory/3632-32-0x00000000065B0000-0x0000000006600000-memory.dmp

Filesize
320KB

Download
memory/3632-31-0x0000000006A30000-0x0000000007048000-memory.dmp

Filesize
6.1MB

Download
memory/4792-15-0x00000000752E0000-0x0000000075A90000-memory.dmp

Filesize
7.7MB

Download
memory/4792-6-0x00000000053B0000-0x00000000053CE000-memory.dmp

Filesize
120KB

Download
memory/4792-0-0x00000000752EE000-0x00000000752EF000-memory.dmp

Filesize
4KB

Download
memory/4792-9-0x000000000B410000-0x000000000B778000-memory.dmp

Filesize
3.4MB

Download
memory/4792-8-0x00000000752E0000-0x0000000075A90000-memory.dmp

Filesize
7.7MB

Download
memory/4792-1-0x0000000000460000-0x0000000000820000-memory.dmp

Filesize
3.8MB

Download
memory/4792-7-0x00000000752EE000-0x00000000752EF000-memory.dmp

Filesize
4KB

Download
memory/4792-2-0x00000000055C0000-0x0000000005B64000-memory.dmp

Filesize
5.6MB

Download
memory/4792-3-0x00000000050C0000-0x0000000005152000-memory.dmp

Filesize
584KB

Download
memory/4792-4-0x00000000752E0000-0x0000000075A90000-memory.dmp

Filesize
7.7MB

Download
memory/4792-10-0x000000000A250000-0x000000000A2EC000-memory.dmp

Filesize
624KB

Download
memory/4792-5-0x0000000005260000-0x000000000526A000-memory.dmp

Filesize
40KB

Download
memory/4808-30-0x00000000752E0000-0x0000000075A90000-memory.dmp

Filesize
7.7MB

Download
memory/4808-25-0x00000000752E0000-0x0000000075A90000-memory.dmp

Filesize
7.7MB

Download
memory/4808-24-0x00000000752E0000-0x0000000075A90000-memory.dmp

Filesize
7.7MB

Download
memory/4808-23-0x00000000752E0000-0x0000000075A90000-memory.dmp

Filesize
7.7MB

Download