quasar | 5b76a4dbfc0d08d90ce4b0ad4ab6374d0590cb89d369d1cc885bd9be7efb5a6d

General

Target

SMSS.exe
Size

3.1MB
MD5

e13a0155794d4a05bc89613791380236
SHA1

d99af2c2846e0c8f4b557903df9b4c1a87585bf6
SHA256

5b76a4dbfc0d08d90ce4b0ad4ab6374d0590cb89d369d1cc885bd9be7efb5a6d
SHA512

54657d4d3959c33ec8ce6d3e983c05b27aae4081aec9f78c79d9ab16c86c9f052354784e9a8cc8c31482c37eeea402b28d4dfabce68e9ee5d57e534cbeb1929e
SSDEEP

49152:HvnI22SsaNYfdPBldt698dBcjH4WRJ6cbR3LoGd/THHB72eh2NT:HvI22SsaNYfdPBldt6+dBcjH4WRJ6m

Score

10^/10

quasar pon spyware stealer trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Pon

C2

7.tcp.eu.ngrok.io:12225

Mutex

5e9a9d41-187d-4dbc-b58d-2d437b9805a5

Attributes

encryption_key
000B0FC52B6272482F163898894B0BB6D8795F55
install_name
smss.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Quasar Client Startup
subdirectory
RealSMSS

Signatures

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

Quasar payload 3 IoCs

resource	yara_rule
behavioral1/memory/1440-0-0x0000000000FA0000-0x00000000012C4000-memory.dmp	family_quasar
behavioral1/files/0x000700000001abde-5.dat	family_quasar
behavioral1/files/0x000700000001abde-7.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
4644	smss.exe

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001
Legitimate hosting services abused for malware hosting/C2 1 TTPs

Web Service
T1102
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1440	SMSS.exe
Token: SeDebugPrivilege	4644	smss.exe

Suspicious use of FindShellTrayWindow 4 IoCs

pid	Process
4644	smss.exe
4644	smss.exe
4644	smss.exe
4644	smss.exe

Suspicious use of SendNotifyMessage 4 IoCs

pid	Process
4644	smss.exe
4644	smss.exe
4644	smss.exe
4644	smss.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4644	smss.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 1440 wrote to memory of 4644	1440	SMSS.exe	71
PID 1440 wrote to memory of 4644	1440	SMSS.exe	71

C:\Users\Admin\AppData\Local\Temp\SMSS.exe
"C:\Users\Admin\AppData\Local\Temp\SMSS.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1440
- C:\Users\Admin\AppData\Roaming\RealSMSS\smss.exe
  "C:\Users\Admin\AppData\Roaming\RealSMSS\smss.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of SetWindowsHookEx
  PID:4644

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Web Service

1

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

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

Filesize
1KB

MD5
d63ff49d7c92016feb39812e4db10419

SHA1
2307d5e35ca9864ffefc93acf8573ea995ba189b

SHA256
375076241775962f3edc08a8c72832a00920b427a4f3332528d91d21e909fa12

SHA512
00f8c8d0336d6575b956876183199624d6f4d2056f2c0aa633a6f17c516f22ee648062d9bc419254d84c459323e9424f0da8aed9dd4e16c2926e5ba30e797d8a

Download Submit
C:\Users\Admin\AppData\Roaming\RealSMSS\smss.exe

Filesize
3.1MB

MD5
e13a0155794d4a05bc89613791380236

SHA1
d99af2c2846e0c8f4b557903df9b4c1a87585bf6

SHA256
5b76a4dbfc0d08d90ce4b0ad4ab6374d0590cb89d369d1cc885bd9be7efb5a6d

SHA512
54657d4d3959c33ec8ce6d3e983c05b27aae4081aec9f78c79d9ab16c86c9f052354784e9a8cc8c31482c37eeea402b28d4dfabce68e9ee5d57e534cbeb1929e

Download Submit
C:\Users\Admin\AppData\Roaming\RealSMSS\smss.exe

Filesize
3.1MB

MD5
e13a0155794d4a05bc89613791380236

SHA1
d99af2c2846e0c8f4b557903df9b4c1a87585bf6

SHA256
5b76a4dbfc0d08d90ce4b0ad4ab6374d0590cb89d369d1cc885bd9be7efb5a6d

SHA512
54657d4d3959c33ec8ce6d3e983c05b27aae4081aec9f78c79d9ab16c86c9f052354784e9a8cc8c31482c37eeea402b28d4dfabce68e9ee5d57e534cbeb1929e

Download Submit
memory/1440-9-0x00007FF8C77B0000-0x00007FF8C819C000-memory.dmp

Filesize
9.9MB

Download
memory/1440-2-0x000000001C900000-0x000000001CA00000-memory.dmp

Filesize
1024KB

Download
memory/1440-1-0x00007FF8C77B0000-0x00007FF8C819C000-memory.dmp

Filesize
9.9MB

Download
memory/1440-0-0x0000000000FA0000-0x00000000012C4000-memory.dmp

Filesize
3.1MB

Download
memory/4644-10-0x00007FF8C77B0000-0x00007FF8C819C000-memory.dmp

Filesize
9.9MB

Download
memory/4644-11-0x000000001C300000-0x000000001C400000-memory.dmp

Filesize
1024KB

Download
memory/4644-12-0x000000001C900000-0x000000001C950000-memory.dmp

Filesize
320KB

Download
memory/4644-13-0x000000001CA10000-0x000000001CAC2000-memory.dmp

Filesize
712KB

Download
memory/4644-16-0x000000001C2E0000-0x000000001C2F2000-memory.dmp

Filesize
72KB

Download
memory/4644-17-0x000000001C990000-0x000000001C9CE000-memory.dmp

Filesize
248KB

Download
memory/4644-18-0x00007FF8C77B0000-0x00007FF8C819C000-memory.dmp

Filesize
9.9MB

Download
memory/4644-19-0x000000001C300000-0x000000001C400000-memory.dmp

Filesize
1024KB

Download

Analysis

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