quasar | 5bda0fc048c68899988ae1d18bffe618d76edc0e02abcf3289018ac1038ff420

Analysis

max time kernel
119s
max time network
120s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
03-02-2025 15:02

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

5bda0fc048c68899988ae1d18bffe618d76edc0e02abcf3289018ac1038ff420.exe
Size

3.5MB
MD5

e2fda9b25175bcb451e03a0b9f7fa553
SHA1

930c980264efdaa1b02a319adc983a7ae3b5e8be
SHA256

5bda0fc048c68899988ae1d18bffe618d76edc0e02abcf3289018ac1038ff420
SHA512

80d386f384833764ada0cfba3adc97a164d97c28276fab93330647735b6fa6e6234436ad75d6e0533efdcaf3087c4f08f67c300c534194224203f6fb1a51e384
SSDEEP

98304:tPFxE2HrpKZpq4yeZHLYmJ5baIYOXo+/mWkigOuJa3DZ:BnrNOpmeZHL15baHQoY9TD

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

Mutex

02351e291-5d041-4fa37-932c7-869aeiQec514992

Attributes

encryption_key
3145298725BA5E0DD56E87FFE3F8898EA81E6EDA
install_name
workbook.exe
log_directory
Logs
reconnect_delay
6000
startup_key
workbook
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/3020-12-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar
behavioral1/memory/3020-15-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar
behavioral1/memory/3020-17-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar
behavioral1/memory/3020-20-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar
behavioral1/memory/3020-11-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar

Executes dropped EXE 6 IoCs

pid	Process
1640	workbook.exe
836	workbook.exe
1332	workbook.exe
616	workbook.exe
1824	workbook.exe
1484	workbook.exe

Loads dropped DLL 1 IoCs

pid	Process
3020	5bda0fc048c68899988ae1d18bffe618d76edc0e02abcf3289018ac1038ff420.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2804 set thread context of 3020	2804	5bda0fc048c68899988ae1d18bffe618d76edc0e02abcf3289018ac1038ff420.exe	31

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	5bda0fc048c68899988ae1d18bffe618d76edc0e02abcf3289018ac1038ff420.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	5bda0fc048c68899988ae1d18bffe618d76edc0e02abcf3289018ac1038ff420.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	workbook.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
3000	schtasks.exe

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
1640	workbook.exe
1640	workbook.exe
1640	workbook.exe
1640	workbook.exe
1640	workbook.exe
1640	workbook.exe
1640	workbook.exe
1640	workbook.exe
1640	workbook.exe
1640	workbook.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3020	5bda0fc048c68899988ae1d18bffe618d76edc0e02abcf3289018ac1038ff420.exe
Token: SeDebugPrivilege	1640	workbook.exe

Suspicious use of WriteProcessMemory 37 IoCs

description	pid	Process	procid_target
PID 2804 wrote to memory of 3020	2804	5bda0fc048c68899988ae1d18bffe618d76edc0e02abcf3289018ac1038ff420.exe	31
PID 2804 wrote to memory of 3020	2804	5bda0fc048c68899988ae1d18bffe618d76edc0e02abcf3289018ac1038ff420.exe	31
PID 2804 wrote to memory of 3020	2804	5bda0fc048c68899988ae1d18bffe618d76edc0e02abcf3289018ac1038ff420.exe	31
PID 2804 wrote to memory of 3020	2804	5bda0fc048c68899988ae1d18bffe618d76edc0e02abcf3289018ac1038ff420.exe	31
PID 2804 wrote to memory of 3020	2804	5bda0fc048c68899988ae1d18bffe618d76edc0e02abcf3289018ac1038ff420.exe	31
PID 2804 wrote to memory of 3020	2804	5bda0fc048c68899988ae1d18bffe618d76edc0e02abcf3289018ac1038ff420.exe	31
PID 2804 wrote to memory of 3020	2804	5bda0fc048c68899988ae1d18bffe618d76edc0e02abcf3289018ac1038ff420.exe	31
PID 2804 wrote to memory of 3020	2804	5bda0fc048c68899988ae1d18bffe618d76edc0e02abcf3289018ac1038ff420.exe	31
PID 2804 wrote to memory of 3020	2804	5bda0fc048c68899988ae1d18bffe618d76edc0e02abcf3289018ac1038ff420.exe	31
PID 3020 wrote to memory of 3000	3020	5bda0fc048c68899988ae1d18bffe618d76edc0e02abcf3289018ac1038ff420.exe	32
PID 3020 wrote to memory of 3000	3020	5bda0fc048c68899988ae1d18bffe618d76edc0e02abcf3289018ac1038ff420.exe	32
PID 3020 wrote to memory of 3000	3020	5bda0fc048c68899988ae1d18bffe618d76edc0e02abcf3289018ac1038ff420.exe	32
PID 3020 wrote to memory of 3000	3020	5bda0fc048c68899988ae1d18bffe618d76edc0e02abcf3289018ac1038ff420.exe	32
PID 3020 wrote to memory of 1640	3020	5bda0fc048c68899988ae1d18bffe618d76edc0e02abcf3289018ac1038ff420.exe	34
PID 3020 wrote to memory of 1640	3020	5bda0fc048c68899988ae1d18bffe618d76edc0e02abcf3289018ac1038ff420.exe	34
PID 3020 wrote to memory of 1640	3020	5bda0fc048c68899988ae1d18bffe618d76edc0e02abcf3289018ac1038ff420.exe	34
PID 3020 wrote to memory of 1640	3020	5bda0fc048c68899988ae1d18bffe618d76edc0e02abcf3289018ac1038ff420.exe	34
PID 1640 wrote to memory of 836	1640	workbook.exe	35
PID 1640 wrote to memory of 836	1640	workbook.exe	35
PID 1640 wrote to memory of 836	1640	workbook.exe	35
PID 1640 wrote to memory of 836	1640	workbook.exe	35
PID 1640 wrote to memory of 1332	1640	workbook.exe	36
PID 1640 wrote to memory of 1332	1640	workbook.exe	36
PID 1640 wrote to memory of 1332	1640	workbook.exe	36
PID 1640 wrote to memory of 1332	1640	workbook.exe	36
PID 1640 wrote to memory of 616	1640	workbook.exe	37
PID 1640 wrote to memory of 616	1640	workbook.exe	37
PID 1640 wrote to memory of 616	1640	workbook.exe	37
PID 1640 wrote to memory of 616	1640	workbook.exe	37
PID 1640 wrote to memory of 1824	1640	workbook.exe	38
PID 1640 wrote to memory of 1824	1640	workbook.exe	38
PID 1640 wrote to memory of 1824	1640	workbook.exe	38
PID 1640 wrote to memory of 1824	1640	workbook.exe	38
PID 1640 wrote to memory of 1484	1640	workbook.exe	39
PID 1640 wrote to memory of 1484	1640	workbook.exe	39
PID 1640 wrote to memory of 1484	1640	workbook.exe	39
PID 1640 wrote to memory of 1484	1640	workbook.exe	39

C:\Users\Admin\AppData\Local\Temp\5bda0fc048c68899988ae1d18bffe618d76edc0e02abcf3289018ac1038ff420.exe
"C:\Users\Admin\AppData\Local\Temp\5bda0fc048c68899988ae1d18bffe618d76edc0e02abcf3289018ac1038ff420.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2804
- C:\Users\Admin\AppData\Local\Temp\5bda0fc048c68899988ae1d18bffe618d76edc0e02abcf3289018ac1038ff420.exe
  "C:\Users\Admin\AppData\Local\Temp\5bda0fc048c68899988ae1d18bffe618d76edc0e02abcf3289018ac1038ff420.exe"
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3020
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks" /create /tn "workbook" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\workbook.exe" /rl HIGHEST /f
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:3000
- - C:\Users\Admin\AppData\Roaming\SubDir\workbook.exe
    "C:\Users\Admin\AppData\Roaming\SubDir\workbook.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:1640
  - - C:\Users\Admin\AppData\Roaming\SubDir\workbook.exe
      "C:\Users\Admin\AppData\Roaming\SubDir\workbook.exe"
      4⤵
      Executes dropped EXE
      PID:836
  - - C:\Users\Admin\AppData\Roaming\SubDir\workbook.exe
      "C:\Users\Admin\AppData\Roaming\SubDir\workbook.exe"
      4⤵
      Executes dropped EXE
      PID:1332
  - - C:\Users\Admin\AppData\Roaming\SubDir\workbook.exe
      "C:\Users\Admin\AppData\Roaming\SubDir\workbook.exe"
      4⤵
      Executes dropped EXE
      PID:616
  - - C:\Users\Admin\AppData\Roaming\SubDir\workbook.exe
      "C:\Users\Admin\AppData\Roaming\SubDir\workbook.exe"
      4⤵
      Executes dropped EXE
      PID:1824
  - - C:\Users\Admin\AppData\Roaming\SubDir\workbook.exe
      "C:\Users\Admin\AppData\Roaming\SubDir\workbook.exe"
      4⤵
      Executes dropped EXE
      PID:1484

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

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Roaming\SubDir\workbook.exe

Filesize
3.5MB

MD5
e2fda9b25175bcb451e03a0b9f7fa553

SHA1
930c980264efdaa1b02a319adc983a7ae3b5e8be

SHA256
5bda0fc048c68899988ae1d18bffe618d76edc0e02abcf3289018ac1038ff420

SHA512
80d386f384833764ada0cfba3adc97a164d97c28276fab93330647735b6fa6e6234436ad75d6e0533efdcaf3087c4f08f67c300c534194224203f6fb1a51e384

Download Submit
memory/1640-31-0x00000000003C0000-0x0000000000752000-memory.dmp

Filesize
3.6MB

Download
memory/2804-0-0x000000007446E000-0x000000007446F000-memory.dmp

Filesize
4KB

Download
memory/2804-1-0x0000000001030000-0x00000000013C2000-memory.dmp

Filesize
3.6MB

Download
memory/2804-2-0x0000000074460000-0x0000000074B4E000-memory.dmp

Filesize
6.9MB

Download
memory/2804-3-0x000000007446E000-0x000000007446F000-memory.dmp

Filesize
4KB

Download
memory/2804-4-0x00000000004A0000-0x00000000004B2000-memory.dmp

Filesize
72KB

Download
memory/2804-5-0x0000000074460000-0x0000000074B4E000-memory.dmp

Filesize
6.9MB

Download
memory/2804-6-0x00000000084A0000-0x0000000008808000-memory.dmp

Filesize
3.4MB

Download
memory/2804-22-0x0000000074460000-0x0000000074B4E000-memory.dmp

Filesize
6.9MB

Download
memory/3020-17-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/3020-21-0x0000000074460000-0x0000000074B4E000-memory.dmp

Filesize
6.9MB

Download
memory/3020-20-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/3020-15-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/3020-23-0x0000000074460000-0x0000000074B4E000-memory.dmp

Filesize
6.9MB

Download
memory/3020-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/3020-11-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/3020-9-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/3020-12-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/3020-32-0x0000000074460000-0x0000000074B4E000-memory.dmp

Filesize
6.9MB

Download
memory/3020-7-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download