quasar | 5bda0fc048c68899988ae1d18bffe618d76edc0e02abcf3289018ac1038ff420

Analysis

max time kernel
94s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
03-02-2025 15:02

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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 1 IoCs

resource	yara_rule
behavioral2/memory/1468-11-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar

Executes dropped EXE 2 IoCs

pid	Process
4424	workbook.exe
3516	workbook.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 3352 set thread context of 1468	3352	5bda0fc048c68899988ae1d18bffe618d76edc0e02abcf3289018ac1038ff420.exe	90
PID 4424 set thread context of 3516	4424	workbook.exe	96

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	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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	workbook.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
5068	schtasks.exe
4332	schtasks.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3352	5bda0fc048c68899988ae1d18bffe618d76edc0e02abcf3289018ac1038ff420.exe
3352	5bda0fc048c68899988ae1d18bffe618d76edc0e02abcf3289018ac1038ff420.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	3352	5bda0fc048c68899988ae1d18bffe618d76edc0e02abcf3289018ac1038ff420.exe
Token: SeDebugPrivilege	1468	5bda0fc048c68899988ae1d18bffe618d76edc0e02abcf3289018ac1038ff420.exe
Token: SeDebugPrivilege	3516	workbook.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3516	workbook.exe

Suspicious use of WriteProcessMemory 28 IoCs

description	pid	Process	procid_target
PID 3352 wrote to memory of 2512	3352	5bda0fc048c68899988ae1d18bffe618d76edc0e02abcf3289018ac1038ff420.exe	89
PID 3352 wrote to memory of 2512	3352	5bda0fc048c68899988ae1d18bffe618d76edc0e02abcf3289018ac1038ff420.exe	89
PID 3352 wrote to memory of 2512	3352	5bda0fc048c68899988ae1d18bffe618d76edc0e02abcf3289018ac1038ff420.exe	89
PID 3352 wrote to memory of 1468	3352	5bda0fc048c68899988ae1d18bffe618d76edc0e02abcf3289018ac1038ff420.exe	90
PID 3352 wrote to memory of 1468	3352	5bda0fc048c68899988ae1d18bffe618d76edc0e02abcf3289018ac1038ff420.exe	90
PID 3352 wrote to memory of 1468	3352	5bda0fc048c68899988ae1d18bffe618d76edc0e02abcf3289018ac1038ff420.exe	90
PID 3352 wrote to memory of 1468	3352	5bda0fc048c68899988ae1d18bffe618d76edc0e02abcf3289018ac1038ff420.exe	90
PID 3352 wrote to memory of 1468	3352	5bda0fc048c68899988ae1d18bffe618d76edc0e02abcf3289018ac1038ff420.exe	90
PID 3352 wrote to memory of 1468	3352	5bda0fc048c68899988ae1d18bffe618d76edc0e02abcf3289018ac1038ff420.exe	90
PID 3352 wrote to memory of 1468	3352	5bda0fc048c68899988ae1d18bffe618d76edc0e02abcf3289018ac1038ff420.exe	90
PID 3352 wrote to memory of 1468	3352	5bda0fc048c68899988ae1d18bffe618d76edc0e02abcf3289018ac1038ff420.exe	90
PID 1468 wrote to memory of 5068	1468	5bda0fc048c68899988ae1d18bffe618d76edc0e02abcf3289018ac1038ff420.exe	91
PID 1468 wrote to memory of 5068	1468	5bda0fc048c68899988ae1d18bffe618d76edc0e02abcf3289018ac1038ff420.exe	91
PID 1468 wrote to memory of 5068	1468	5bda0fc048c68899988ae1d18bffe618d76edc0e02abcf3289018ac1038ff420.exe	91
PID 1468 wrote to memory of 4424	1468	5bda0fc048c68899988ae1d18bffe618d76edc0e02abcf3289018ac1038ff420.exe	93
PID 1468 wrote to memory of 4424	1468	5bda0fc048c68899988ae1d18bffe618d76edc0e02abcf3289018ac1038ff420.exe	93
PID 1468 wrote to memory of 4424	1468	5bda0fc048c68899988ae1d18bffe618d76edc0e02abcf3289018ac1038ff420.exe	93
PID 4424 wrote to memory of 3516	4424	workbook.exe	96
PID 4424 wrote to memory of 3516	4424	workbook.exe	96
PID 4424 wrote to memory of 3516	4424	workbook.exe	96
PID 4424 wrote to memory of 3516	4424	workbook.exe	96
PID 4424 wrote to memory of 3516	4424	workbook.exe	96
PID 4424 wrote to memory of 3516	4424	workbook.exe	96
PID 4424 wrote to memory of 3516	4424	workbook.exe	96
PID 4424 wrote to memory of 3516	4424	workbook.exe	96
PID 3516 wrote to memory of 4332	3516	workbook.exe	97
PID 3516 wrote to memory of 4332	3516	workbook.exe	97
PID 3516 wrote to memory of 4332	3516	workbook.exe	97

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 behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3352
- C:\Users\Admin\AppData\Local\Temp\5bda0fc048c68899988ae1d18bffe618d76edc0e02abcf3289018ac1038ff420.exe
  "C:\Users\Admin\AppData\Local\Temp\5bda0fc048c68899988ae1d18bffe618d76edc0e02abcf3289018ac1038ff420.exe"
  2⤵
  PID:2512
- C:\Users\Admin\AppData\Local\Temp\5bda0fc048c68899988ae1d18bffe618d76edc0e02abcf3289018ac1038ff420.exe
  "C:\Users\Admin\AppData\Local\Temp\5bda0fc048c68899988ae1d18bffe618d76edc0e02abcf3289018ac1038ff420.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1468
- - 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:5068
- - C:\Users\Admin\AppData\Roaming\SubDir\workbook.exe
    "C:\Users\Admin\AppData\Roaming\SubDir\workbook.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:4424
  - - C:\Users\Admin\AppData\Roaming\SubDir\workbook.exe
      "C:\Users\Admin\AppData\Roaming\SubDir\workbook.exe"
      4⤵
      Executes dropped EXE
      System Location Discovery: System Language Discovery
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of SetWindowsHookEx
      Suspicious use of WriteProcessMemory
      PID:3516
    - - C:\Windows\SysWOW64\schtasks.exe
        
        "schtasks" /create /tn "workbook" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\workbook.exe" /rl HIGHEST /f
        5⤵
        System Location Discovery: System Language Discovery
        Scheduled Task/Job: Scheduled Task
        
        PID:4332

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\5bda0fc048c68899988ae1d18bffe618d76edc0e02abcf3289018ac1038ff420.exe.log

Filesize
1KB

MD5
8ec831f3e3a3f77e4a7b9cd32b48384c

SHA1
d83f09fd87c5bd86e045873c231c14836e76a05c

SHA256
7667e538030e3f8ce2886e47a01af24cb0ea70528b1e821c5d8832c5076cb982

SHA512
26bffa2406b66368bd412bf25869a792631455645992cdcade2dbc13a2e56fb546414a6a9223b94c96c38d89187add6678d4779a88b38b0c9e36be8527b213c3

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

Filesize
3.5MB

MD5
e2fda9b25175bcb451e03a0b9f7fa553

SHA1
930c980264efdaa1b02a319adc983a7ae3b5e8be

SHA256
5bda0fc048c68899988ae1d18bffe618d76edc0e02abcf3289018ac1038ff420

SHA512
80d386f384833764ada0cfba3adc97a164d97c28276fab93330647735b6fa6e6234436ad75d6e0533efdcaf3087c4f08f67c300c534194224203f6fb1a51e384

Download Submit
memory/1468-11-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/1468-22-0x0000000075140000-0x00000000758F0000-memory.dmp

Filesize
7.7MB

Download
memory/1468-16-0x0000000075140000-0x00000000758F0000-memory.dmp

Filesize
7.7MB

Download
memory/1468-14-0x0000000075140000-0x00000000758F0000-memory.dmp

Filesize
7.7MB

Download
memory/3352-15-0x0000000075140000-0x00000000758F0000-memory.dmp

Filesize
7.7MB

Download
memory/3352-1-0x0000000000F10000-0x00000000012A2000-memory.dmp

Filesize
3.6MB

Download
memory/3352-8-0x0000000005EC0000-0x0000000005ED2000-memory.dmp

Filesize
72KB

Download
memory/3352-9-0x0000000075140000-0x00000000758F0000-memory.dmp

Filesize
7.7MB

Download
memory/3352-10-0x0000000008780000-0x0000000008AE8000-memory.dmp

Filesize
3.4MB

Download
memory/3352-6-0x0000000005FA0000-0x000000000603C000-memory.dmp

Filesize
624KB

Download
memory/3352-5-0x0000000005CA0000-0x0000000005CAA000-memory.dmp

Filesize
40KB

Download
memory/3352-4-0x0000000075140000-0x00000000758F0000-memory.dmp

Filesize
7.7MB

Download
memory/3352-0-0x000000007514E000-0x000000007514F000-memory.dmp

Filesize
4KB

Download
memory/3352-3-0x0000000005CF0000-0x0000000005D82000-memory.dmp

Filesize
584KB

Download
memory/3352-2-0x00000000062A0000-0x0000000006844000-memory.dmp

Filesize
5.6MB

Download
memory/3352-7-0x000000007514E000-0x000000007514F000-memory.dmp

Filesize
4KB

Download
memory/3516-31-0x0000000006AE0000-0x00000000070F8000-memory.dmp

Filesize
6.1MB

Download
memory/3516-32-0x0000000006600000-0x0000000006650000-memory.dmp

Filesize
320KB

Download
memory/3516-33-0x0000000006870000-0x0000000006922000-memory.dmp

Filesize
712KB

Download
memory/3516-36-0x0000000007C00000-0x0000000007C12000-memory.dmp

Filesize
72KB

Download
memory/3516-37-0x0000000007C60000-0x0000000007C9C000-memory.dmp

Filesize
240KB

Download
memory/3516-38-0x0000000007D10000-0x0000000007D76000-memory.dmp

Filesize
408KB

Download
memory/4424-23-0x0000000075140000-0x00000000758F0000-memory.dmp

Filesize
7.7MB

Download
memory/4424-24-0x0000000075140000-0x00000000758F0000-memory.dmp

Filesize
7.7MB

Download
memory/4424-25-0x0000000075140000-0x00000000758F0000-memory.dmp

Filesize
7.7MB

Download
memory/4424-26-0x0000000005D60000-0x0000000005D72000-memory.dmp

Filesize
72KB

Download
memory/4424-30-0x0000000075140000-0x00000000758F0000-memory.dmp

Filesize
7.7MB

Download