quasar | cce6d7fc922f75d8a904e74b48dfbac2ecf4e332792522985422902d34100bd1

Analysis

max time kernel
43s
max time network
18s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-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 5 IoCs

resource	yara_rule
behavioral1/memory/2508-13-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar
behavioral1/memory/2508-15-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar
behavioral1/memory/2508-10-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar
behavioral1/memory/2508-9-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar
behavioral1/memory/2508-18-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar

Executes dropped EXE 6 IoCs

pid	Process
2916	Excelworkbook.exe
2752	Excelworkbook.exe
1044	Excelworkbook.exe
1676	Excelworkbook.exe
1376	Excelworkbook.exe
2600	Excelworkbook.exe

Loads dropped DLL 1 IoCs

pid	Process
2508	cce6d7fc922f75d8a904e74b48dfbac2ecf4e332792522985422902d34100bd1.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2384 set thread context of 2508	2384	cce6d7fc922f75d8a904e74b48dfbac2ecf4e332792522985422902d34100bd1.exe	29

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

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Excelworkbook.exe
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

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

pid	Process
2764	schtasks.exe

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
2916	Excelworkbook.exe
2916	Excelworkbook.exe
2916	Excelworkbook.exe
2916	Excelworkbook.exe
2916	Excelworkbook.exe
2916	Excelworkbook.exe
2916	Excelworkbook.exe
2916	Excelworkbook.exe
2916	Excelworkbook.exe
2916	Excelworkbook.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2508	cce6d7fc922f75d8a904e74b48dfbac2ecf4e332792522985422902d34100bd1.exe
Token: SeDebugPrivilege	2916	Excelworkbook.exe

Suspicious use of WriteProcessMemory 37 IoCs

description	pid	Process	procid_target
PID 2384 wrote to memory of 2508	2384	cce6d7fc922f75d8a904e74b48dfbac2ecf4e332792522985422902d34100bd1.exe	29
PID 2384 wrote to memory of 2508	2384	cce6d7fc922f75d8a904e74b48dfbac2ecf4e332792522985422902d34100bd1.exe	29
PID 2384 wrote to memory of 2508	2384	cce6d7fc922f75d8a904e74b48dfbac2ecf4e332792522985422902d34100bd1.exe	29
PID 2384 wrote to memory of 2508	2384	cce6d7fc922f75d8a904e74b48dfbac2ecf4e332792522985422902d34100bd1.exe	29
PID 2384 wrote to memory of 2508	2384	cce6d7fc922f75d8a904e74b48dfbac2ecf4e332792522985422902d34100bd1.exe	29
PID 2384 wrote to memory of 2508	2384	cce6d7fc922f75d8a904e74b48dfbac2ecf4e332792522985422902d34100bd1.exe	29
PID 2384 wrote to memory of 2508	2384	cce6d7fc922f75d8a904e74b48dfbac2ecf4e332792522985422902d34100bd1.exe	29
PID 2384 wrote to memory of 2508	2384	cce6d7fc922f75d8a904e74b48dfbac2ecf4e332792522985422902d34100bd1.exe	29
PID 2384 wrote to memory of 2508	2384	cce6d7fc922f75d8a904e74b48dfbac2ecf4e332792522985422902d34100bd1.exe	29
PID 2508 wrote to memory of 2764	2508	cce6d7fc922f75d8a904e74b48dfbac2ecf4e332792522985422902d34100bd1.exe	30
PID 2508 wrote to memory of 2764	2508	cce6d7fc922f75d8a904e74b48dfbac2ecf4e332792522985422902d34100bd1.exe	30
PID 2508 wrote to memory of 2764	2508	cce6d7fc922f75d8a904e74b48dfbac2ecf4e332792522985422902d34100bd1.exe	30
PID 2508 wrote to memory of 2764	2508	cce6d7fc922f75d8a904e74b48dfbac2ecf4e332792522985422902d34100bd1.exe	30
PID 2508 wrote to memory of 2916	2508	cce6d7fc922f75d8a904e74b48dfbac2ecf4e332792522985422902d34100bd1.exe	32
PID 2508 wrote to memory of 2916	2508	cce6d7fc922f75d8a904e74b48dfbac2ecf4e332792522985422902d34100bd1.exe	32
PID 2508 wrote to memory of 2916	2508	cce6d7fc922f75d8a904e74b48dfbac2ecf4e332792522985422902d34100bd1.exe	32
PID 2508 wrote to memory of 2916	2508	cce6d7fc922f75d8a904e74b48dfbac2ecf4e332792522985422902d34100bd1.exe	32
PID 2916 wrote to memory of 2752	2916	Excelworkbook.exe	33
PID 2916 wrote to memory of 2752	2916	Excelworkbook.exe	33
PID 2916 wrote to memory of 2752	2916	Excelworkbook.exe	33
PID 2916 wrote to memory of 2752	2916	Excelworkbook.exe	33
PID 2916 wrote to memory of 1044	2916	Excelworkbook.exe	34
PID 2916 wrote to memory of 1044	2916	Excelworkbook.exe	34
PID 2916 wrote to memory of 1044	2916	Excelworkbook.exe	34
PID 2916 wrote to memory of 1044	2916	Excelworkbook.exe	34
PID 2916 wrote to memory of 1676	2916	Excelworkbook.exe	35
PID 2916 wrote to memory of 1676	2916	Excelworkbook.exe	35
PID 2916 wrote to memory of 1676	2916	Excelworkbook.exe	35
PID 2916 wrote to memory of 1676	2916	Excelworkbook.exe	35
PID 2916 wrote to memory of 1376	2916	Excelworkbook.exe	36
PID 2916 wrote to memory of 1376	2916	Excelworkbook.exe	36
PID 2916 wrote to memory of 1376	2916	Excelworkbook.exe	36
PID 2916 wrote to memory of 1376	2916	Excelworkbook.exe	36
PID 2916 wrote to memory of 2600	2916	Excelworkbook.exe	37
PID 2916 wrote to memory of 2600	2916	Excelworkbook.exe	37
PID 2916 wrote to memory of 2600	2916	Excelworkbook.exe	37
PID 2916 wrote to memory of 2600	2916	Excelworkbook.exe	37

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:2384
- C:\Users\Admin\AppData\Local\Temp\cce6d7fc922f75d8a904e74b48dfbac2ecf4e332792522985422902d34100bd1.exe
  "C:\Users\Admin\AppData\Local\Temp\cce6d7fc922f75d8a904e74b48dfbac2ecf4e332792522985422902d34100bd1.exe"
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2508
- - 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:2764
- - C:\Users\Admin\AppData\Roaming\SubDir\Excelworkbook.exe
    "C:\Users\Admin\AppData\Roaming\SubDir\Excelworkbook.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:2916
  - - C:\Users\Admin\AppData\Roaming\SubDir\Excelworkbook.exe
      "C:\Users\Admin\AppData\Roaming\SubDir\Excelworkbook.exe"
      4⤵
      Executes dropped EXE
      PID:2752
  - - C:\Users\Admin\AppData\Roaming\SubDir\Excelworkbook.exe
      "C:\Users\Admin\AppData\Roaming\SubDir\Excelworkbook.exe"
      4⤵
      Executes dropped EXE
      PID:1044
  - - C:\Users\Admin\AppData\Roaming\SubDir\Excelworkbook.exe
      "C:\Users\Admin\AppData\Roaming\SubDir\Excelworkbook.exe"
      4⤵
      Executes dropped EXE
      PID:1676
  - - C:\Users\Admin\AppData\Roaming\SubDir\Excelworkbook.exe
      "C:\Users\Admin\AppData\Roaming\SubDir\Excelworkbook.exe"
      4⤵
      Executes dropped EXE
      PID:1376
  - - C:\Users\Admin\AppData\Roaming\SubDir\Excelworkbook.exe
      "C:\Users\Admin\AppData\Roaming\SubDir\Excelworkbook.exe"
      4⤵
      Executes dropped EXE
      PID:2600

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\Excelworkbook.exe

Filesize
3.7MB

MD5
747406f007375859ebc4dc757c9bb90e

SHA1
696cb382d1dee2d26cf3618457e802f3e8279d59

SHA256
cce6d7fc922f75d8a904e74b48dfbac2ecf4e332792522985422902d34100bd1

SHA512
ce230f3db3649312484b64a3516a5d7795b654e098f2eefe4cc3c6c87649fd7a6fc1f790c858707453efc6b3481b321ec985f4fae5ed3194dfe6251713c84f09

Download Submit
memory/2384-0-0x0000000074EBE000-0x0000000074EBF000-memory.dmp

Filesize
4KB

Download
memory/2384-1-0x0000000000DD0000-0x0000000001190000-memory.dmp

Filesize
3.8MB

Download
memory/2384-2-0x0000000074EB0000-0x000000007559E000-memory.dmp

Filesize
6.9MB

Download
memory/2384-3-0x00000000004C0000-0x00000000004DE000-memory.dmp

Filesize
120KB

Download
memory/2384-4-0x0000000074EBE000-0x0000000074EBF000-memory.dmp

Filesize
4KB

Download
memory/2384-5-0x0000000074EB0000-0x000000007559E000-memory.dmp

Filesize
6.9MB

Download
memory/2384-6-0x000000000B1F0000-0x000000000B558000-memory.dmp

Filesize
3.4MB

Download
memory/2384-20-0x0000000074EB0000-0x000000007559E000-memory.dmp

Filesize
6.9MB

Download
memory/2508-15-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/2508-13-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/2508-10-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/2508-19-0x0000000074EB0000-0x000000007559E000-memory.dmp

Filesize
6.9MB

Download
memory/2508-9-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/2508-18-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/2508-11-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2508-7-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/2508-21-0x0000000074EB0000-0x000000007559E000-memory.dmp

Filesize
6.9MB

Download
memory/2508-8-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/2508-30-0x0000000074EB0000-0x000000007559E000-memory.dmp

Filesize
6.9MB

Download
memory/2916-29-0x0000000000280000-0x0000000000640000-memory.dmp

Filesize
3.8MB

Download