quasar | 7ed40bf99a35a45a00db1ad472ffbcce1758f5b92491378b89f0559170d8f178

General

Target

7ed40bf99a35a45a00db1ad472ffbcce1758f5b92491378b89f0559170d8f178.exe
Size

3.1MB
MD5

878be87c49bd5b989fbf5464d225430a
SHA1

40149c47a14f317807fa3926318c6c975bba92d8
SHA256

7ed40bf99a35a45a00db1ad472ffbcce1758f5b92491378b89f0559170d8f178
SHA512

9756cb149de4fbc267b82dc0a6dc0fa1724091ce04676568c1874896d4876c79533f234b74566b676edd0a3fd1a609c9e8b9530ce60bb04ce1766befadf365fe
SSDEEP

49152:iv/t62XlaSFNWPjljiFa2RoUYIg5vZEfoEkCqMZo8d1THHB72eh2NT:ivV62XlaSFNWPjljiFXRoUYIg5v30

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

havucmarul.duckdns.org:1604

Mutex

5caac049-af48-4152-a892-2f06b763f213

Attributes

encryption_key
B161C821508495BDAF45580C87E8251AF93A155C
install_name
svchost.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Services
subdirectory
Windows

Signatures

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

Quasar payload 2 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1976-1-0x0000000000F80000-0x00000000012A4000-memory.dmp	family_quasar
behavioral2/files/0x000b000000023b8f-6.dat	family_quasar

Executes dropped EXE 1 IoCs

Processes:

svchost.exe

pid	Process
1756	svchost.exe

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

System Information Discovery
T1082

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

Processes:

schtasks.exeschtasks.exe

pid	Process
3984	schtasks.exe
4548	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

7ed40bf99a35a45a00db1ad472ffbcce1758f5b92491378b89f0559170d8f178.exesvchost.exe

description	pid	Process
Token: SeDebugPrivilege	1976	7ed40bf99a35a45a00db1ad472ffbcce1758f5b92491378b89f0559170d8f178.exe
Token: SeDebugPrivilege	1756	svchost.exe

Suspicious use of FindShellTrayWindow 1 IoCs

Processes:

svchost.exe

pid	Process
1756	svchost.exe

Suspicious use of SendNotifyMessage 1 IoCs

Processes:

svchost.exe

pid	Process
1756	svchost.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

7ed40bf99a35a45a00db1ad472ffbcce1758f5b92491378b89f0559170d8f178.exesvchost.exe

description	pid	Process	procid_target
PID 1976 wrote to memory of 3984	1976	7ed40bf99a35a45a00db1ad472ffbcce1758f5b92491378b89f0559170d8f178.exe	85
PID 1976 wrote to memory of 3984	1976	7ed40bf99a35a45a00db1ad472ffbcce1758f5b92491378b89f0559170d8f178.exe	85
PID 1976 wrote to memory of 1756	1976	7ed40bf99a35a45a00db1ad472ffbcce1758f5b92491378b89f0559170d8f178.exe	87
PID 1976 wrote to memory of 1756	1976	7ed40bf99a35a45a00db1ad472ffbcce1758f5b92491378b89f0559170d8f178.exe	87
PID 1756 wrote to memory of 4548	1756	svchost.exe	90
PID 1756 wrote to memory of 4548	1756	svchost.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\7ed40bf99a35a45a00db1ad472ffbcce1758f5b92491378b89f0559170d8f178.exe
"C:\Users\Admin\AppData\Local\Temp\7ed40bf99a35a45a00db1ad472ffbcce1758f5b92491378b89f0559170d8f178.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1976
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "Services" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Windows\svchost.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:3984
- C:\Users\Admin\AppData\Roaming\Windows\svchost.exe
  "C:\Users\Admin\AppData\Roaming\Windows\svchost.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of WriteProcessMemory
  PID:1756
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "Services" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Windows\svchost.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:4548

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

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\Windows\svchost.exe

Filesize
3.1MB

MD5
878be87c49bd5b989fbf5464d225430a

SHA1
40149c47a14f317807fa3926318c6c975bba92d8

SHA256
7ed40bf99a35a45a00db1ad472ffbcce1758f5b92491378b89f0559170d8f178

SHA512
9756cb149de4fbc267b82dc0a6dc0fa1724091ce04676568c1874896d4876c79533f234b74566b676edd0a3fd1a609c9e8b9530ce60bb04ce1766befadf365fe

Download Submit
memory/1756-9-0x00007FFA21440000-0x00007FFA21F01000-memory.dmp

Filesize
10.8MB

Download
memory/1756-11-0x000000001D250000-0x000000001D2A0000-memory.dmp

Filesize
320KB

Download
memory/1756-12-0x000000001D360000-0x000000001D412000-memory.dmp

Filesize
712KB

Download
memory/1756-13-0x00007FFA21440000-0x00007FFA21F01000-memory.dmp

Filesize
10.8MB

Download
memory/1976-0-0x00007FFA21443000-0x00007FFA21445000-memory.dmp

Filesize
8KB

Download
memory/1976-1-0x0000000000F80000-0x00000000012A4000-memory.dmp

Filesize
3.1MB

Download
memory/1976-2-0x00007FFA21440000-0x00007FFA21F01000-memory.dmp

Filesize
10.8MB

Download
memory/1976-10-0x00007FFA21440000-0x00007FFA21F01000-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