quasar | 2a700406a42a06541dfee93faa1079b51c7a899e3cffcbc31390473852d7e5cc

Analysis

max time kernel
149s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
30-11-2024 21:35

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General

Target

nbothjkd.exe
Size

288KB
MD5

42f1ecb6f9e2f73bb66e84e5f8ca4fb4
SHA1

51aa8b14ec657171aab0dd13fb87c8e915073d08
SHA256

2a700406a42a06541dfee93faa1079b51c7a899e3cffcbc31390473852d7e5cc
SHA512

207162c793e58d702f9474cdfbc4738eaec2e23ad66636a706ad7f8de4f82ae136dc884d5c6f9acb35f3370c8402bd9e3d5572063def33d469b2398e0ac4c398
SSDEEP

6144:l7zO0LSclT6FOwEP5Kq+SMv0VGb7bDcllbkFn:9lJtTF9zVGkllbkZ

Score

10^/10

quasar office discovery spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.0.0

Botnet

Office

45.136.51.217:5173

Mutex

fJtDNXkZg2XmnSxFi9

Attributes

encryption_key
7Ds8HmxRNTT7TqM6R6Sm
install_name
csrss.exe
log_directory
Logs
reconnect_delay
3000
startup_key
NET framework
subdirectory
SubDir

Signatures

Quasar RAT
Quasar is an open source Remote Access Tool.
trojan spyware quasar
Quasar family
quasar

Quasar payload 1 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3576-1-0x0000000000110000-0x000000000015E000-memory.dmp	family_quasar

Looks up external IP address via web service 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

Processes:

flow	ioc
12	ip-api.com

System Location Discovery: System Language Discovery 1 TTPs 2 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

Processes:

nbothjkd.exeschtasks.exe

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

Processes:

schtasks.exe

pid	Process
4052	schtasks.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

nbothjkd.exe

description	pid	Process
Token: SeDebugPrivilege	3576	nbothjkd.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

nbothjkd.exe

pid	Process
3576	nbothjkd.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

nbothjkd.exe

description	pid	Process	procid_target
PID 3576 wrote to memory of 4052	3576	nbothjkd.exe	83
PID 3576 wrote to memory of 4052	3576	nbothjkd.exe	83
PID 3576 wrote to memory of 4052	3576	nbothjkd.exe	83

C:\Users\Admin\AppData\Local\Temp\nbothjkd.exe
"C:\Users\Admin\AppData\Local\Temp\nbothjkd.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3576
- C:\Windows\SysWOW64\schtasks.exe
  "schtasks" /create /tn "NET framework" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\nbothjkd.exe" /rl HIGHEST /f
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:4052

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

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Downloads

memory/3576-0-0x000000007522E000-0x000000007522F000-memory.dmp

Filesize
4KB

Download
memory/3576-1-0x0000000000110000-0x000000000015E000-memory.dmp

Filesize
312KB

Download
memory/3576-2-0x00000000051C0000-0x0000000005764000-memory.dmp

Filesize
5.6MB

Download
memory/3576-3-0x0000000004C10000-0x0000000004CA2000-memory.dmp

Filesize
584KB

Download
memory/3576-4-0x0000000075220000-0x00000000759D0000-memory.dmp

Filesize
7.7MB

Download
memory/3576-5-0x0000000004CB0000-0x0000000004D16000-memory.dmp

Filesize
408KB

Download
memory/3576-6-0x0000000005870000-0x0000000005882000-memory.dmp

Filesize
72KB

Download
memory/3576-7-0x0000000005DB0000-0x0000000005DEC000-memory.dmp

Filesize
240KB

Download
memory/3576-9-0x0000000006120000-0x000000000612A000-memory.dmp

Filesize
40KB

Download
memory/3576-10-0x000000007522E000-0x000000007522F000-memory.dmp

Filesize
4KB

Download
memory/3576-11-0x0000000075220000-0x00000000759D0000-memory.dmp

Filesize
7.7MB

Download