quasar | 4c9fda48a95f89b5a9cd070e9fd77a4c60205e221b682eb6b8d80e7527cafeda

General

Target

4c9fda48a95f89b5a9cd070e9fd77a4c60205e221b682eb6b8d80e7527cafeda.exe
Size

3.1MB
MD5

0e544c7dccc5ac91a382ba67577d7cd6
SHA1

44b0868b7a9b0bf5c20ebeae736ddaeb2385fd92
SHA256

4c9fda48a95f89b5a9cd070e9fd77a4c60205e221b682eb6b8d80e7527cafeda
SHA512

c8544b538f74cfe5b397e958859b6145630db440c6b3700bb3751aa29ed7ac88ab34b9e9896ef70d25275deed05a937b4112932b879db7e93fdd0e2a5929e309
SSDEEP

49152:bv4uf2NUaNmwzPWlvdaKM7ZxTw678gbR4LoGdgaTHHB72eh2NT:bv3f2NUaNmwzPWlvdaB7ZxTw678n

Score

10^/10

quasar stinky spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Stinky

C2

ef3243fsert34.ddns.net:47820

anthonyngati.ddns.net:3872

Mutex

60cba0a9-0a63-450c-9567-57ef0e3c2e24

Attributes

encryption_key
7A23123B6E1E0CCDB27477C6C7654C7BE2FEDE54
install_name
sru.exe
log_directory
Logs
reconnect_delay
3000
startup_key
xml
subdirectory
sru

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/464-1-0x0000000000570000-0x0000000000894000-memory.dmp	family_quasar
behavioral2/files/0x000b000000023b83-5.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
3428	sru.exe

Drops file in System32 directory 5 IoCs

description	ioc	Process
File created	C:\Windows\system32\sru\sru.exe	4c9fda48a95f89b5a9cd070e9fd77a4c60205e221b682eb6b8d80e7527cafeda.exe
File opened for modification	C:\Windows\system32\sru\sru.exe	4c9fda48a95f89b5a9cd070e9fd77a4c60205e221b682eb6b8d80e7527cafeda.exe
File opened for modification	C:\Windows\system32\sru	4c9fda48a95f89b5a9cd070e9fd77a4c60205e221b682eb6b8d80e7527cafeda.exe
File opened for modification	C:\Windows\system32\sru\sru.exe	sru.exe
File opened for modification	C:\Windows\system32\sru	sru.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
1196	schtasks.exe
3376	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	464	4c9fda48a95f89b5a9cd070e9fd77a4c60205e221b682eb6b8d80e7527cafeda.exe
Token: SeDebugPrivilege	3428	sru.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 464 wrote to memory of 1196	464	4c9fda48a95f89b5a9cd070e9fd77a4c60205e221b682eb6b8d80e7527cafeda.exe	83
PID 464 wrote to memory of 1196	464	4c9fda48a95f89b5a9cd070e9fd77a4c60205e221b682eb6b8d80e7527cafeda.exe	83
PID 464 wrote to memory of 3428	464	4c9fda48a95f89b5a9cd070e9fd77a4c60205e221b682eb6b8d80e7527cafeda.exe	85
PID 464 wrote to memory of 3428	464	4c9fda48a95f89b5a9cd070e9fd77a4c60205e221b682eb6b8d80e7527cafeda.exe	85
PID 3428 wrote to memory of 3376	3428	sru.exe	86
PID 3428 wrote to memory of 3376	3428	sru.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\4c9fda48a95f89b5a9cd070e9fd77a4c60205e221b682eb6b8d80e7527cafeda.exe
"C:\Users\Admin\AppData\Local\Temp\4c9fda48a95f89b5a9cd070e9fd77a4c60205e221b682eb6b8d80e7527cafeda.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:464
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "xml" /sc ONLOGON /tr "C:\Windows\system32\sru\sru.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:1196
- C:\Windows\system32\sru\sru.exe
  "C:\Windows\system32\sru\sru.exe"
  2⤵
  - Executes dropped EXE
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3428
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "xml" /sc ONLOGON /tr "C:\Windows\system32\sru\sru.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:3376

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\sru\sru.exe

Filesize
3.1MB

MD5
0e544c7dccc5ac91a382ba67577d7cd6

SHA1
44b0868b7a9b0bf5c20ebeae736ddaeb2385fd92

SHA256
4c9fda48a95f89b5a9cd070e9fd77a4c60205e221b682eb6b8d80e7527cafeda

SHA512
c8544b538f74cfe5b397e958859b6145630db440c6b3700bb3751aa29ed7ac88ab34b9e9896ef70d25275deed05a937b4112932b879db7e93fdd0e2a5929e309

Download Submit
memory/464-0-0x00007FFD82373000-0x00007FFD82375000-memory.dmp

Filesize
8KB

Download
memory/464-1-0x0000000000570000-0x0000000000894000-memory.dmp

Filesize
3.1MB

Download
memory/464-2-0x00007FFD82370000-0x00007FFD82E31000-memory.dmp

Filesize
10.8MB

Download
memory/464-10-0x00007FFD82370000-0x00007FFD82E31000-memory.dmp

Filesize
10.8MB

Download
memory/3428-9-0x00007FFD82370000-0x00007FFD82E31000-memory.dmp

Filesize
10.8MB

Download
memory/3428-11-0x00007FFD82370000-0x00007FFD82E31000-memory.dmp

Filesize
10.8MB

Download
memory/3428-12-0x0000000002DA0000-0x0000000002DF0000-memory.dmp

Filesize
320KB

Download
memory/3428-13-0x000000001D9B0000-0x000000001DA62000-memory.dmp

Filesize
712KB

Download
memory/3428-14-0x00007FFD82370000-0x00007FFD82E31000-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