quasar | fd12d28d6b8030ec8e3d28c13ce562dc0f42b085806401b02a1155a6f44eb19c

Analysis

max time kernel
124s
max time network
142s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
19-11-2024 08:21

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General

Target

fd12d28d6b8030ec8e3d28c13ce562dc0f42b085806401b02a1155a6f44eb19c.exe
Size

3.5MB
MD5

1834eaa9099724ef4fe227478fed783a
SHA1

61176db35c4cda5a118bd4f3505d5bda26ebced0
SHA256

fd12d28d6b8030ec8e3d28c13ce562dc0f42b085806401b02a1155a6f44eb19c
SHA512

04191f86b0f2d9c1eecf71b4ff26ad20dacda5e4840b073a4c2a40b0927e8d3ec58ed6c12b4934eeaaef0e8311fe9877886ae1d4ec0970377ac6f9c00e2eced1
SSDEEP

98304:DApiYNYRIkC6rLk+hXKUXPHCU+6VbgAs25XXQn5lE1kU7:DAtYPjxJHCogAs25XAn5lEt

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/1736-11-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar

Executes dropped EXE 5 IoCs

pid	Process
1888	workbook.exe
404	workbook.exe
4768	workbook.exe
4264	workbook.exe
3392	workbook.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1712 set thread context of 1736	1712	fd12d28d6b8030ec8e3d28c13ce562dc0f42b085806401b02a1155a6f44eb19c.exe	101
PID 1888 set thread context of 3392	1888	workbook.exe	111

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	fd12d28d6b8030ec8e3d28c13ce562dc0f42b085806401b02a1155a6f44eb19c.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	fd12d28d6b8030ec8e3d28c13ce562dc0f42b085806401b02a1155a6f44eb19c.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
1228	schtasks.exe
1048	schtasks.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
1888	workbook.exe
1888	workbook.exe
1888	workbook.exe
1888	workbook.exe
1888	workbook.exe
1888	workbook.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1736	fd12d28d6b8030ec8e3d28c13ce562dc0f42b085806401b02a1155a6f44eb19c.exe
Token: SeDebugPrivilege	1888	workbook.exe
Token: SeDebugPrivilege	3392	workbook.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3392	workbook.exe

Suspicious use of WriteProcessMemory 34 IoCs

description	pid	Process	procid_target
PID 1712 wrote to memory of 1736	1712	fd12d28d6b8030ec8e3d28c13ce562dc0f42b085806401b02a1155a6f44eb19c.exe	101
PID 1712 wrote to memory of 1736	1712	fd12d28d6b8030ec8e3d28c13ce562dc0f42b085806401b02a1155a6f44eb19c.exe	101
PID 1712 wrote to memory of 1736	1712	fd12d28d6b8030ec8e3d28c13ce562dc0f42b085806401b02a1155a6f44eb19c.exe	101
PID 1712 wrote to memory of 1736	1712	fd12d28d6b8030ec8e3d28c13ce562dc0f42b085806401b02a1155a6f44eb19c.exe	101
PID 1712 wrote to memory of 1736	1712	fd12d28d6b8030ec8e3d28c13ce562dc0f42b085806401b02a1155a6f44eb19c.exe	101
PID 1712 wrote to memory of 1736	1712	fd12d28d6b8030ec8e3d28c13ce562dc0f42b085806401b02a1155a6f44eb19c.exe	101
PID 1712 wrote to memory of 1736	1712	fd12d28d6b8030ec8e3d28c13ce562dc0f42b085806401b02a1155a6f44eb19c.exe	101
PID 1712 wrote to memory of 1736	1712	fd12d28d6b8030ec8e3d28c13ce562dc0f42b085806401b02a1155a6f44eb19c.exe	101
PID 1736 wrote to memory of 1228	1736	fd12d28d6b8030ec8e3d28c13ce562dc0f42b085806401b02a1155a6f44eb19c.exe	102
PID 1736 wrote to memory of 1228	1736	fd12d28d6b8030ec8e3d28c13ce562dc0f42b085806401b02a1155a6f44eb19c.exe	102
PID 1736 wrote to memory of 1228	1736	fd12d28d6b8030ec8e3d28c13ce562dc0f42b085806401b02a1155a6f44eb19c.exe	102
PID 1736 wrote to memory of 1888	1736	fd12d28d6b8030ec8e3d28c13ce562dc0f42b085806401b02a1155a6f44eb19c.exe	104
PID 1736 wrote to memory of 1888	1736	fd12d28d6b8030ec8e3d28c13ce562dc0f42b085806401b02a1155a6f44eb19c.exe	104
PID 1736 wrote to memory of 1888	1736	fd12d28d6b8030ec8e3d28c13ce562dc0f42b085806401b02a1155a6f44eb19c.exe	104
PID 1888 wrote to memory of 404	1888	workbook.exe	108
PID 1888 wrote to memory of 404	1888	workbook.exe	108
PID 1888 wrote to memory of 404	1888	workbook.exe	108
PID 1888 wrote to memory of 4768	1888	workbook.exe	109
PID 1888 wrote to memory of 4768	1888	workbook.exe	109
PID 1888 wrote to memory of 4768	1888	workbook.exe	109
PID 1888 wrote to memory of 4264	1888	workbook.exe	110
PID 1888 wrote to memory of 4264	1888	workbook.exe	110
PID 1888 wrote to memory of 4264	1888	workbook.exe	110
PID 1888 wrote to memory of 3392	1888	workbook.exe	111
PID 1888 wrote to memory of 3392	1888	workbook.exe	111
PID 1888 wrote to memory of 3392	1888	workbook.exe	111
PID 1888 wrote to memory of 3392	1888	workbook.exe	111
PID 1888 wrote to memory of 3392	1888	workbook.exe	111
PID 1888 wrote to memory of 3392	1888	workbook.exe	111
PID 1888 wrote to memory of 3392	1888	workbook.exe	111
PID 1888 wrote to memory of 3392	1888	workbook.exe	111
PID 3392 wrote to memory of 1048	3392	workbook.exe	112
PID 3392 wrote to memory of 1048	3392	workbook.exe	112
PID 3392 wrote to memory of 1048	3392	workbook.exe	112

C:\Users\Admin\AppData\Local\Temp\fd12d28d6b8030ec8e3d28c13ce562dc0f42b085806401b02a1155a6f44eb19c.exe
"C:\Users\Admin\AppData\Local\Temp\fd12d28d6b8030ec8e3d28c13ce562dc0f42b085806401b02a1155a6f44eb19c.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1712
- C:\Users\Admin\AppData\Local\Temp\fd12d28d6b8030ec8e3d28c13ce562dc0f42b085806401b02a1155a6f44eb19c.exe
  "C:\Users\Admin\AppData\Local\Temp\fd12d28d6b8030ec8e3d28c13ce562dc0f42b085806401b02a1155a6f44eb19c.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1736
- - 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:1228
- - 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 behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:1888
  - - C:\Users\Admin\AppData\Roaming\SubDir\workbook.exe
      "C:\Users\Admin\AppData\Roaming\SubDir\workbook.exe"
      4⤵
      Executes dropped EXE
      PID:404
  - - C:\Users\Admin\AppData\Roaming\SubDir\workbook.exe
      "C:\Users\Admin\AppData\Roaming\SubDir\workbook.exe"
      4⤵
      Executes dropped EXE
      PID:4768
  - - C:\Users\Admin\AppData\Roaming\SubDir\workbook.exe
      "C:\Users\Admin\AppData\Roaming\SubDir\workbook.exe"
      4⤵
      Executes dropped EXE
      PID:4264
  - - 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:3392
    - - 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:1048

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\fd12d28d6b8030ec8e3d28c13ce562dc0f42b085806401b02a1155a6f44eb19c.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
1834eaa9099724ef4fe227478fed783a

SHA1
61176db35c4cda5a118bd4f3505d5bda26ebced0

SHA256
fd12d28d6b8030ec8e3d28c13ce562dc0f42b085806401b02a1155a6f44eb19c

SHA512
04191f86b0f2d9c1eecf71b4ff26ad20dacda5e4840b073a4c2a40b0927e8d3ec58ed6c12b4934eeaaef0e8311fe9877886ae1d4ec0970377ac6f9c00e2eced1

Download Submit
memory/1712-5-0x00000000752C0000-0x0000000075A70000-memory.dmp

Filesize
7.7MB

Download
memory/1712-3-0x0000000005D00000-0x0000000005D92000-memory.dmp

Filesize
584KB

Download
memory/1712-4-0x0000000005CD0000-0x0000000005CDA000-memory.dmp

Filesize
40KB

Download
memory/1712-6-0x0000000005FD0000-0x000000000606C000-memory.dmp

Filesize
624KB

Download
memory/1712-2-0x00000000062B0000-0x0000000006854000-memory.dmp

Filesize
5.6MB

Download
memory/1712-7-0x0000000005E70000-0x0000000005E82000-memory.dmp

Filesize
72KB

Download
memory/1712-8-0x00000000752CE000-0x00000000752CF000-memory.dmp

Filesize
4KB

Download
memory/1712-9-0x00000000752C0000-0x0000000075A70000-memory.dmp

Filesize
7.7MB

Download
memory/1712-10-0x00000000096F0000-0x0000000009A58000-memory.dmp

Filesize
3.4MB

Download
memory/1712-1-0x0000000000F50000-0x00000000012E0000-memory.dmp

Filesize
3.6MB

Download
memory/1712-0-0x00000000752CE000-0x00000000752CF000-memory.dmp

Filesize
4KB

Download
memory/1712-14-0x00000000752C0000-0x0000000075A70000-memory.dmp

Filesize
7.7MB

Download
memory/1736-13-0x00000000752C0000-0x0000000075A70000-memory.dmp

Filesize
7.7MB

Download
memory/1736-15-0x00000000752C0000-0x0000000075A70000-memory.dmp

Filesize
7.7MB

Download
memory/1736-11-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/1736-22-0x00000000752C0000-0x0000000075A70000-memory.dmp

Filesize
7.7MB

Download
memory/1888-23-0x00000000752C0000-0x0000000075A70000-memory.dmp

Filesize
7.7MB

Download
memory/1888-24-0x00000000752C0000-0x0000000075A70000-memory.dmp

Filesize
7.7MB

Download
memory/1888-25-0x00000000056B0000-0x00000000056C2000-memory.dmp

Filesize
72KB

Download
memory/1888-26-0x00000000752C0000-0x0000000075A70000-memory.dmp

Filesize
7.7MB

Download
memory/1888-33-0x00000000752C0000-0x0000000075A70000-memory.dmp

Filesize
7.7MB

Download
memory/3392-34-0x0000000006A10000-0x0000000007028000-memory.dmp

Filesize
6.1MB

Download
memory/3392-35-0x0000000006560000-0x00000000065B0000-memory.dmp

Filesize
320KB

Download
memory/3392-36-0x00000000067D0000-0x0000000006882000-memory.dmp

Filesize
712KB

Download