quasar | 22d6bb99b130d4ca4ffd7fdb8e1f2660e4bd70a0713ba7cebd0913be4fcd0056

Analysis

max time kernel
125s
max time network
142s
platform
windows10-2004_x64
resource
win10v2004-20250129-en
resource tags

arch:x64arch:x86image:win10v2004-20250129-enlocale:en-usos:windows10-2004-x64system
submitted
04-02-2025 11:24

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General

Target

updater.exe
Size

3.3MB
MD5

247782c8f55790643a8f71e87915f85d
SHA1

610f1c71c85d5a47fa9e7495dbe7131f194670a3
SHA256

22d6bb99b130d4ca4ffd7fdb8e1f2660e4bd70a0713ba7cebd0913be4fcd0056
SHA512

a3b930ed7fb32e7868aee766d2f4e8dad48714df4aed98ac9fa460265f000f4607bb157f196dd85bd907346b342b6f96fa0969e321b88131dc797a25632cc9bd
SSDEEP

98304:6v462XlaSFNWPjljiFXRoUYIr/RJ60Wrv:MwZYSBW

Score

10^/10

quasar updater spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

updater

84.234.19.36:4782

Mutex

bba70724-e63f-429e-a6db-7272aa6f32e1

Attributes

encryption_key
ECC9828BB5C1CB8A0FE0D993AC8183DEA61ACBBC
install_name
updater.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Updater
subdirectory
Update_29012025

Signatures

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

Quasar payload 2 IoCs

resource	yara_rule
behavioral2/memory/2800-1-0x0000000000F50000-0x00000000012A0000-memory.dmp	family_quasar
behavioral2/files/0x000b000000023b77-5.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2084	updater.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
1076	schtasks.exe
4840	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2800	updater.exe
Token: SeDebugPrivilege	2084	updater.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2800 wrote to memory of 1076	2800	updater.exe	86
PID 2800 wrote to memory of 1076	2800	updater.exe	86
PID 2800 wrote to memory of 2084	2800	updater.exe	88
PID 2800 wrote to memory of 2084	2800	updater.exe	88
PID 2084 wrote to memory of 4840	2084	updater.exe	90
PID 2084 wrote to memory of 4840	2084	updater.exe	90

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\updater.exe
"C:\Users\Admin\AppData\Local\Temp\updater.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2800
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "Updater" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Update_29012025\updater.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:1076
- C:\Users\Admin\AppData\Roaming\Update_29012025\updater.exe
  "C:\Users\Admin\AppData\Roaming\Update_29012025\updater.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2084
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "Updater" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Update_29012025\updater.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:4840

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

Query Registry

T1012

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\updater.exe.log

Filesize
1KB

MD5
baf55b95da4a601229647f25dad12878

SHA1
abc16954ebfd213733c4493fc1910164d825cac8

SHA256
ee954c5d8156fd8890e582c716e5758ed9b33721258f10e758bdc31ccbcb1924

SHA512
24f502fedb1a305d0d7b08857ffc1db9b2359ff34e06d5748ecc84e35c985f29a20d9f0a533bea32d234ab37097ec0481620c63b14ac89b280e75e14d19fd545

Download Submit
C:\Users\Admin\AppData\Roaming\Update_29012025\updater.exe

Filesize
3.3MB

MD5
247782c8f55790643a8f71e87915f85d

SHA1
610f1c71c85d5a47fa9e7495dbe7131f194670a3

SHA256
22d6bb99b130d4ca4ffd7fdb8e1f2660e4bd70a0713ba7cebd0913be4fcd0056

SHA512
a3b930ed7fb32e7868aee766d2f4e8dad48714df4aed98ac9fa460265f000f4607bb157f196dd85bd907346b342b6f96fa0969e321b88131dc797a25632cc9bd

Download Submit
memory/2084-10-0x00007FFBE5370000-0x00007FFBE5E31000-memory.dmp

Filesize
10.8MB

Download
memory/2084-11-0x00007FFBE5370000-0x00007FFBE5E31000-memory.dmp

Filesize
10.8MB

Download
memory/2084-12-0x000000001B7E0000-0x000000001B830000-memory.dmp

Filesize
320KB

Download
memory/2084-13-0x000000001BF60000-0x000000001C012000-memory.dmp

Filesize
712KB

Download
memory/2084-14-0x00007FFBE5370000-0x00007FFBE5E31000-memory.dmp

Filesize
10.8MB

Download
memory/2800-0-0x00007FFBE5373000-0x00007FFBE5375000-memory.dmp

Filesize
8KB

Download
memory/2800-1-0x0000000000F50000-0x00000000012A0000-memory.dmp

Filesize
3.3MB

Download
memory/2800-2-0x00007FFBE5370000-0x00007FFBE5E31000-memory.dmp

Filesize
10.8MB

Download
memory/2800-9-0x00007FFBE5370000-0x00007FFBE5E31000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads