quasar | b3c3b561ccbf7495fad802c6fd079b90a26964d01a7340ebd4d9c1e4bc1a6a52

General

Target

b3c3b561ccbf7495fad802c6fd079b90a26964d01a7340ebd4d9c1e4bc1a6a52N.exe
Size

3.1MB
MD5

94da5dd6f7a50b3d660f3471d19ccdc0
SHA1

52693e5d3106eaf45a139dc460795ef1ae1173a5
SHA256

b3c3b561ccbf7495fad802c6fd079b90a26964d01a7340ebd4d9c1e4bc1a6a52
SHA512

959e569dac00260e5774a89018abb579731f67e22f8da001bfdf74cfa9252a0e9998c436b2d720121c5474de13a896647579bf7ced91ad84aa9b7ac5e58de07f
SSDEEP

49152:av/lL26AaNeWgPhlmVqvMQ7XSKPHgMtDw48coGdMTHHB72eh2NT:avNL26AaNeWgPhlmVqkQ7XSKPAMJ

Score

10^/10

quasar database spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

database

C2

91.160.181.237:4782

91.160.181.237:4783

Mutex

bcda0faa-47b1-4e7d-be7c-8ff6fbc69a61

Attributes

encryption_key
65940F11374651C87E8131C4328E542AEFE6F05D
install_name
Runtlme Broker.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Runtlme Broker
subdirectory
Runtlme Broker

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/4480-1-0x00000000001E0000-0x0000000000504000-memory.dmp	family_quasar
behavioral2/files/0x000c000000023b96-6.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
468	Runtlme Broker.exe

Drops file in System32 directory 5 IoCs

description	ioc	Process
File opened for modification	C:\Windows\system32\Runtlme Broker	b3c3b561ccbf7495fad802c6fd079b90a26964d01a7340ebd4d9c1e4bc1a6a52N.exe
File opened for modification	C:\Windows\system32\Runtlme Broker\Runtlme Broker.exe	Runtlme Broker.exe
File opened for modification	C:\Windows\system32\Runtlme Broker	Runtlme Broker.exe
File created	C:\Windows\system32\Runtlme Broker\Runtlme Broker.exe	b3c3b561ccbf7495fad802c6fd079b90a26964d01a7340ebd4d9c1e4bc1a6a52N.exe
File opened for modification	C:\Windows\system32\Runtlme Broker\Runtlme Broker.exe	b3c3b561ccbf7495fad802c6fd079b90a26964d01a7340ebd4d9c1e4bc1a6a52N.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
824	schtasks.exe
3340	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4480	b3c3b561ccbf7495fad802c6fd079b90a26964d01a7340ebd4d9c1e4bc1a6a52N.exe
Token: SeDebugPrivilege	468	Runtlme Broker.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
468	Runtlme Broker.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4480 wrote to memory of 824	4480	b3c3b561ccbf7495fad802c6fd079b90a26964d01a7340ebd4d9c1e4bc1a6a52N.exe	83
PID 4480 wrote to memory of 824	4480	b3c3b561ccbf7495fad802c6fd079b90a26964d01a7340ebd4d9c1e4bc1a6a52N.exe	83
PID 4480 wrote to memory of 468	4480	b3c3b561ccbf7495fad802c6fd079b90a26964d01a7340ebd4d9c1e4bc1a6a52N.exe	85
PID 4480 wrote to memory of 468	4480	b3c3b561ccbf7495fad802c6fd079b90a26964d01a7340ebd4d9c1e4bc1a6a52N.exe	85
PID 468 wrote to memory of 3340	468	Runtlme Broker.exe	86
PID 468 wrote to memory of 3340	468	Runtlme Broker.exe	86

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\b3c3b561ccbf7495fad802c6fd079b90a26964d01a7340ebd4d9c1e4bc1a6a52N.exe
"C:\Users\Admin\AppData\Local\Temp\b3c3b561ccbf7495fad802c6fd079b90a26964d01a7340ebd4d9c1e4bc1a6a52N.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4480
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "Runtlme Broker" /sc ONLOGON /tr "C:\Windows\system32\Runtlme Broker\Runtlme Broker.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:824
- C:\Windows\system32\Runtlme Broker\Runtlme Broker.exe
  "C:\Windows\system32\Runtlme Broker\Runtlme Broker.exe"
  2⤵
  - Executes dropped EXE
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:468
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "Runtlme Broker" /sc ONLOGON /tr "C:\Windows\system32\Runtlme Broker\Runtlme Broker.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:3340

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\System32\Runtlme Broker\Runtlme Broker.exe

Filesize
3.1MB

MD5
94da5dd6f7a50b3d660f3471d19ccdc0

SHA1
52693e5d3106eaf45a139dc460795ef1ae1173a5

SHA256
b3c3b561ccbf7495fad802c6fd079b90a26964d01a7340ebd4d9c1e4bc1a6a52

SHA512
959e569dac00260e5774a89018abb579731f67e22f8da001bfdf74cfa9252a0e9998c436b2d720121c5474de13a896647579bf7ced91ad84aa9b7ac5e58de07f

Download Submit
memory/468-10-0x00007FF998060000-0x00007FF998B21000-memory.dmp

Filesize
10.8MB

Download
memory/468-11-0x00007FF998060000-0x00007FF998B21000-memory.dmp

Filesize
10.8MB

Download
memory/468-12-0x0000000002CF0000-0x0000000002D40000-memory.dmp

Filesize
320KB

Download
memory/468-13-0x000000001BE90000-0x000000001BF42000-memory.dmp

Filesize
712KB

Download
memory/468-14-0x00007FF998060000-0x00007FF998B21000-memory.dmp

Filesize
10.8MB

Download
memory/4480-0-0x00007FF998063000-0x00007FF998065000-memory.dmp

Filesize
8KB

Download
memory/4480-1-0x00000000001E0000-0x0000000000504000-memory.dmp

Filesize
3.1MB

Download
memory/4480-2-0x00007FF998060000-0x00007FF998B21000-memory.dmp

Filesize
10.8MB

Download
memory/4480-9-0x00007FF998060000-0x00007FF998B21000-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