quasar | 9bb743bcf31905ef1c6f43d45c38c1f28ad352bd9a26509bbfbedc915eb41a9c

Analysis

max time kernel
1797s
max time network
1799s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
22-05-2024 21:52

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General

Target

Z877Hdn.exe
Size

3.1MB
MD5

7ed897b505b072b2bf8e9defacd37cf3
SHA1

afd9f5c336d142ac8ba98d4a4a8a65de7f902051
SHA256

9bb743bcf31905ef1c6f43d45c38c1f28ad352bd9a26509bbfbedc915eb41a9c
SHA512

a7027f2d6cb4995a6df16da9933544425b7577085a9da1b8150aa4b4a33fc388bb5814dd52a013dea4e22f68b73dde62798615feefc40b369c00c82be4fce188
SSDEEP

49152:bvSI22SsaNYfdPBldt698dBcjHWCO1JGLoGdqRYUTHHB72eh2NT:bv/22SsaNYfdPBldt6+dBcjHWCha

Score

10^/10

quasar negro spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

negro

192.168.254.138:4782

Mutex

27d614ba-ea44-400a-9548-ce68ca6d90a9

Attributes

encryption_key
26B037B4C62A63CF09010E0757669A9491063FC4
install_name
java.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Quasar Client Startup
subdirectory
SubDir

Signatures

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

Quasar payload 2 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1752-1-0x00000000007D0000-0x0000000000AF4000-memory.dmp	family_quasar
C:\Users\Admin\AppData\Roaming\SubDir\java.exe	family_quasar

Executes dropped EXE 1 IoCs

Processes:

java.exe

pid process

3400 java.exe
Creates scheduled task(s) 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task/Job
T1053

Processes:

schtasks.exeschtasks.exe

pid process

5048 schtasks.exe
1708 schtasks.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

Z877Hdn.exejava.exe

description pid process

Token: SeDebugPrivilege 1752 Z877Hdn.exe
Token: SeDebugPrivilege 3400 java.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

java.exe

pid process

3400 java.exe

pid	process
3400	java.exe

pid	process
5048	schtasks.exe
1708	schtasks.exe

description	pid	process
Token: SeDebugPrivilege	1752	Z877Hdn.exe
Token: SeDebugPrivilege	3400	java.exe

pid	process
3400	java.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

Z877Hdn.exejava.exe

description	pid	process	target process
PID 1752 wrote to memory of 5048	1752	Z877Hdn.exe	schtasks.exe
PID 1752 wrote to memory of 5048	1752	Z877Hdn.exe	schtasks.exe
PID 1752 wrote to memory of 3400	1752	Z877Hdn.exe	java.exe
PID 1752 wrote to memory of 3400	1752	Z877Hdn.exe	java.exe
PID 3400 wrote to memory of 1708	3400	java.exe	schtasks.exe
PID 3400 wrote to memory of 1708	3400	java.exe	schtasks.exe

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\Z877Hdn.exe
"C:\Users\Admin\AppData\Local\Temp\Z877Hdn.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1752

C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\java.exe" /rl HIGHEST /f
2⤵
- Creates scheduled task(s)
PID:5048

C:\Users\Admin\AppData\Roaming\SubDir\java.exe
"C:\Users\Admin\AppData\Roaming\SubDir\java.exe"
2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3400

C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\java.exe" /rl HIGHEST /f
3⤵
- Creates scheduled task(s)
PID:1708

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Scheduled Task/Job

T1053

Privilege Escalation

Scheduled Task/Job

T1053

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\SubDir\java.exe
Filesize
3.1MB

MD5
7ed897b505b072b2bf8e9defacd37cf3

SHA1
afd9f5c336d142ac8ba98d4a4a8a65de7f902051

SHA256
9bb743bcf31905ef1c6f43d45c38c1f28ad352bd9a26509bbfbedc915eb41a9c

SHA512
a7027f2d6cb4995a6df16da9933544425b7577085a9da1b8150aa4b4a33fc388bb5814dd52a013dea4e22f68b73dde62798615feefc40b369c00c82be4fce188

Download Submit
memory/1752-0-0x00007FF9A8013000-0x00007FF9A8015000-memory.dmp

Filesize
8KB

Download
memory/1752-1-0x00000000007D0000-0x0000000000AF4000-memory.dmp

Filesize
3.1MB

Download
memory/1752-2-0x00007FF9A8010000-0x00007FF9A8AD1000-memory.dmp

Filesize
10.8MB

Download
memory/1752-9-0x00007FF9A8010000-0x00007FF9A8AD1000-memory.dmp

Filesize
10.8MB

Download
memory/3400-8-0x00007FF9A8010000-0x00007FF9A8AD1000-memory.dmp

Filesize
10.8MB

Download
memory/3400-10-0x00007FF9A8010000-0x00007FF9A8AD1000-memory.dmp

Filesize
10.8MB

Download
memory/3400-11-0x00000000033C0000-0x0000000003410000-memory.dmp

Filesize
320KB

Download
memory/3400-12-0x000000001CA40000-0x000000001CAF2000-memory.dmp

Filesize
712KB

Download
memory/3400-13-0x00007FF9A8010000-0x00007FF9A8AD1000-memory.dmp

Filesize
10.8MB

Download