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 3 IoCs

resource	yara_rule
behavioral1/memory/1728-1-0x00000000003C0000-0x00000000006E4000-memory.dmp	family_quasar
behavioral1/files/0x0009000000016df8-6.dat	family_quasar
behavioral1/memory/2476-9-0x00000000013A0000-0x00000000016C4000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2476	Runtlme Broker.exe

Drops file in System32 directory 5 IoCs

description	ioc	Process
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
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

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
2716	schtasks.exe
2316	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1728	b3c3b561ccbf7495fad802c6fd079b90a26964d01a7340ebd4d9c1e4bc1a6a52N.exe
Token: SeDebugPrivilege	2476	Runtlme Broker.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2476	Runtlme Broker.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 1728 wrote to memory of 2316	1728	b3c3b561ccbf7495fad802c6fd079b90a26964d01a7340ebd4d9c1e4bc1a6a52N.exe	30
PID 1728 wrote to memory of 2316	1728	b3c3b561ccbf7495fad802c6fd079b90a26964d01a7340ebd4d9c1e4bc1a6a52N.exe	30
PID 1728 wrote to memory of 2316	1728	b3c3b561ccbf7495fad802c6fd079b90a26964d01a7340ebd4d9c1e4bc1a6a52N.exe	30
PID 1728 wrote to memory of 2476	1728	b3c3b561ccbf7495fad802c6fd079b90a26964d01a7340ebd4d9c1e4bc1a6a52N.exe	32
PID 1728 wrote to memory of 2476	1728	b3c3b561ccbf7495fad802c6fd079b90a26964d01a7340ebd4d9c1e4bc1a6a52N.exe	32
PID 1728 wrote to memory of 2476	1728	b3c3b561ccbf7495fad802c6fd079b90a26964d01a7340ebd4d9c1e4bc1a6a52N.exe	32
PID 2476 wrote to memory of 2716	2476	Runtlme Broker.exe	33
PID 2476 wrote to memory of 2716	2476	Runtlme Broker.exe	33
PID 2476 wrote to memory of 2716	2476	Runtlme Broker.exe	33

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:1728
- 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:2316
- 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:2476
- - 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:2716

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/1728-0-0x000007FEF5E73000-0x000007FEF5E74000-memory.dmp

Filesize
4KB

Download
memory/1728-1-0x00000000003C0000-0x00000000006E4000-memory.dmp

Filesize
3.1MB

Download
memory/1728-2-0x000007FEF5E70000-0x000007FEF685C000-memory.dmp

Filesize
9.9MB

Download
memory/1728-8-0x000007FEF5E70000-0x000007FEF685C000-memory.dmp

Filesize
9.9MB

Download
memory/2476-11-0x000007FEF5E70000-0x000007FEF685C000-memory.dmp

Filesize
9.9MB

Download
memory/2476-10-0x000007FEF5E70000-0x000007FEF685C000-memory.dmp

Filesize
9.9MB

Download
memory/2476-9-0x00000000013A0000-0x00000000016C4000-memory.dmp

Filesize
3.1MB

Download
memory/2476-12-0x000007FEF5E70000-0x000007FEF685C000-memory.dmp

Filesize
9.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads