quasar | e637549ded084cd9e61d64c46ef644362ccd60df698be34e3ebbec60a8a7d609

General

Target

0x000c000000012262-5.exe
Size

3.1MB
MD5

548a6f6748f28b10a5e2f69f9c52fa43
SHA1

7466319907b51baca2b604144c0b7d021806da80
SHA256

e637549ded084cd9e61d64c46ef644362ccd60df698be34e3ebbec60a8a7d609
SHA512

25f26bba572e91f118dafc20248a77a891fc318b5aeb3b17971a6b06415de2b55a6f046eb012f0fa9501bf50957a91b53a70398586b533dc8d98dfcbed36fab4
SSDEEP

49152:HvSI22SsaNYfdPBldt698dBcjHoGrMoGHTTHHB72eh2NT:Hv/22SsaNYfdPBldt6+dBcjHoGY

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

84.67.89.127:4782

Mutex

40b84850-9991-4b2c-a985-76db9b77d6fe

Attributes

encryption_key
24D2D4587F63E088D81748782350D3C2EF08E8BC
install_name
SystemRuntimes.exe
log_directory
Logs
reconnect_delay
3000
startup_key
DisplayRuntimes
subdirectory
SubDir

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/2800-1-0x0000000001140000-0x0000000001464000-memory.dmp	family_quasar
behavioral1/files/0x002d000000015f25-6.dat	family_quasar
behavioral1/memory/2668-9-0x00000000008E0000-0x0000000000C04000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2668	SystemRuntimes.exe

Drops file in System32 directory 5 IoCs

description	ioc	Process
File opened for modification	C:\Windows\system32\SubDir	SystemRuntimes.exe
File created	C:\Windows\system32\SubDir\SystemRuntimes.exe	0x000c000000012262-5.exe
File opened for modification	C:\Windows\system32\SubDir\SystemRuntimes.exe	0x000c000000012262-5.exe
File opened for modification	C:\Windows\system32\SubDir	0x000c000000012262-5.exe
File opened for modification	C:\Windows\system32\SubDir\SystemRuntimes.exe	SystemRuntimes.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

pid	Process
2916	schtasks.exe
1752	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2800	0x000c000000012262-5.exe
Token: SeDebugPrivilege	2668	SystemRuntimes.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2668	SystemRuntimes.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
2668	SystemRuntimes.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2668	SystemRuntimes.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2800 wrote to memory of 2916	2800	0x000c000000012262-5.exe	30
PID 2800 wrote to memory of 2916	2800	0x000c000000012262-5.exe	30
PID 2800 wrote to memory of 2916	2800	0x000c000000012262-5.exe	30
PID 2800 wrote to memory of 2668	2800	0x000c000000012262-5.exe	32
PID 2800 wrote to memory of 2668	2800	0x000c000000012262-5.exe	32
PID 2800 wrote to memory of 2668	2800	0x000c000000012262-5.exe	32
PID 2668 wrote to memory of 1752	2668	SystemRuntimes.exe	33
PID 2668 wrote to memory of 1752	2668	SystemRuntimes.exe	33
PID 2668 wrote to memory of 1752	2668	SystemRuntimes.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\0x000c000000012262-5.exe
"C:\Users\Admin\AppData\Local\Temp\0x000c000000012262-5.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2800
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "DisplayRuntimes" /sc ONLOGON /tr "C:\Windows\system32\SubDir\SystemRuntimes.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2916
- C:\Windows\system32\SubDir\SystemRuntimes.exe
  "C:\Windows\system32\SubDir\SystemRuntimes.exe"
  2⤵
  - Executes dropped EXE
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2668
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn "DisplayRuntimes" /sc ONLOGON /tr "C:\Windows\system32\SubDir\SystemRuntimes.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:1752

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:\Windows\System32\SubDir\SystemRuntimes.exe

Filesize
3.1MB

MD5
548a6f6748f28b10a5e2f69f9c52fa43

SHA1
7466319907b51baca2b604144c0b7d021806da80

SHA256
e637549ded084cd9e61d64c46ef644362ccd60df698be34e3ebbec60a8a7d609

SHA512
25f26bba572e91f118dafc20248a77a891fc318b5aeb3b17971a6b06415de2b55a6f046eb012f0fa9501bf50957a91b53a70398586b533dc8d98dfcbed36fab4

Download Submit
memory/2668-8-0x000007FEF6440000-0x000007FEF6E2C000-memory.dmp

Filesize
9.9MB

Download
memory/2668-9-0x00000000008E0000-0x0000000000C04000-memory.dmp

Filesize
3.1MB

Download
memory/2668-11-0x000007FEF6440000-0x000007FEF6E2C000-memory.dmp

Filesize
9.9MB

Download
memory/2668-12-0x000007FEF6440000-0x000007FEF6E2C000-memory.dmp

Filesize
9.9MB

Download
memory/2800-0-0x000007FEF6443000-0x000007FEF6444000-memory.dmp

Filesize
4KB

Download
memory/2800-1-0x0000000001140000-0x0000000001464000-memory.dmp

Filesize
3.1MB

Download
memory/2800-2-0x000007FEF6440000-0x000007FEF6E2C000-memory.dmp

Filesize
9.9MB

Download
memory/2800-10-0x000007FEF6440000-0x000007FEF6E2C000-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