quasar | af6a17197ef3da87971496daf39475598053e250d58c82c610d55ce4267102e2

General

Target

ripplewoofer.exe
Size

3.1MB
MD5

aefac3053fe23e06c3cd4c123a69ca37
SHA1

3971e70e42e0148deb5b879da32bdcf6e3702197
SHA256

af6a17197ef3da87971496daf39475598053e250d58c82c610d55ce4267102e2
SHA512

2d611803fabd368214d61ef345eea20e41090a4db196e300782fb06d6fada2c548f909e3362a7c40852b3aab239b60e1acd613e523508be18f5e370375f40242
SSDEEP

49152:GvUt62XlaSFNWPjljiFa2RoUYItaRJ61bR3LoGdf4pTHHB72eh2NT:GvI62XlaSFNWPjljiFXRoUYItaRJ6HP

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

192.168.0.28:4782

Mutex

21dc5e45-8c42-4e7e-a882-b318788e9ca8

Attributes

encryption_key
C77A16FAC6C225B2DB880A8156F0D384EB290A9E
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Boostrapper
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/1288-1-0x0000000000BD0000-0x0000000000EF4000-memory.dmp	family_quasar
behavioral1/files/0x0008000000018be7-6.dat	family_quasar
behavioral1/memory/3052-8-0x0000000000B00000-0x0000000000E24000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
3052	Client.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
2580	schtasks.exe
2708	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1288	ripplewoofer.exe
Token: SeDebugPrivilege	3052	Client.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
3052	Client.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
3052	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3052	Client.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 1288 wrote to memory of 2580	1288	ripplewoofer.exe	30
PID 1288 wrote to memory of 2580	1288	ripplewoofer.exe	30
PID 1288 wrote to memory of 2580	1288	ripplewoofer.exe	30
PID 1288 wrote to memory of 3052	1288	ripplewoofer.exe	32
PID 1288 wrote to memory of 3052	1288	ripplewoofer.exe	32
PID 1288 wrote to memory of 3052	1288	ripplewoofer.exe	32
PID 3052 wrote to memory of 2708	3052	Client.exe	33
PID 3052 wrote to memory of 2708	3052	Client.exe	33
PID 3052 wrote to memory of 2708	3052	Client.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\ripplewoofer.exe
"C:\Users\Admin\AppData\Local\Temp\ripplewoofer.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1288
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "Boostrapper" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2580
- C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
  "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3052
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn "Boostrapper" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2708

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\SubDir\Client.exe

Filesize
3.1MB

MD5
aefac3053fe23e06c3cd4c123a69ca37

SHA1
3971e70e42e0148deb5b879da32bdcf6e3702197

SHA256
af6a17197ef3da87971496daf39475598053e250d58c82c610d55ce4267102e2

SHA512
2d611803fabd368214d61ef345eea20e41090a4db196e300782fb06d6fada2c548f909e3362a7c40852b3aab239b60e1acd613e523508be18f5e370375f40242

Download Submit
memory/1288-0-0x000007FEF5D13000-0x000007FEF5D14000-memory.dmp

Filesize
4KB

Download
memory/1288-1-0x0000000000BD0000-0x0000000000EF4000-memory.dmp

Filesize
3.1MB

Download
memory/1288-2-0x000007FEF5D10000-0x000007FEF66FC000-memory.dmp

Filesize
9.9MB

Download
memory/1288-9-0x000007FEF5D10000-0x000007FEF66FC000-memory.dmp

Filesize
9.9MB

Download
memory/3052-8-0x0000000000B00000-0x0000000000E24000-memory.dmp

Filesize
3.1MB

Download
memory/3052-11-0x000007FEF5D10000-0x000007FEF66FC000-memory.dmp

Filesize
9.9MB

Download
memory/3052-10-0x000007FEF5D10000-0x000007FEF66FC000-memory.dmp

Filesize
9.9MB

Download
memory/3052-12-0x000007FEF5D10000-0x000007FEF66FC000-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