quasar | 538962a772724887e06411bdca86db10e9d4ab08147e330b2e7ebc17d796ffeb

General

Target

wmm.exe
Size

3.1MB
MD5

16cd26bec647159bbecaa3eeed061bf0
SHA1

276c745df06dca1dafb9dc6f82717a59b816c99c
SHA256

538962a772724887e06411bdca86db10e9d4ab08147e330b2e7ebc17d796ffeb
SHA512

5f905a129ffe433687fe64732160e9e2064f8a20f0ebeb819e2b536c5de9309805f7d7a0bbbc922b4809ee68480d618c87d34aac2414f8638b431772b860e6c0
SSDEEP

49152:KvzI22SsaNYfdPBldt698dBcjH9JRJ6YbR3LoGdUTHHB72eh2NT:KvM22SsaNYfdPBldt6+dBcjH9JRJ6y

Score

10^/10

quasar indexer spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

indexer

C2

jt8iyre.localto.net:55644

Mutex

7861b74d-57c7-453f-9218-a4a2335c1a0d

Attributes

encryption_key
54717FCDBD30C7781F669403FBC8E35733C37E34
install_name
searchindexer.exe
log_directory
Logs
reconnect_delay
3000
startup_key
searchindexer
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/3032-1-0x00000000013C0000-0x00000000016E4000-memory.dmp	family_quasar
behavioral1/files/0x0009000000015cd1-6.dat	family_quasar
behavioral1/memory/1112-9-0x0000000001250000-0x0000000001574000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
1112	searchindexer.exe

Drops file in Program Files directory 5 IoCs

description	ioc	Process
File opened for modification	C:\Program Files\SubDir\searchindexer.exe	wmm.exe
File opened for modification	C:\Program Files\SubDir	wmm.exe
File opened for modification	C:\Program Files\SubDir\searchindexer.exe	searchindexer.exe
File opened for modification	C:\Program Files\SubDir	searchindexer.exe
File created	C:\Program Files\SubDir\searchindexer.exe	wmm.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
1728	schtasks.exe
2560	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3032	wmm.exe
Token: SeDebugPrivilege	1112	searchindexer.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
1112	searchindexer.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
1112	searchindexer.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1112	searchindexer.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 3032 wrote to memory of 1728	3032	wmm.exe	30
PID 3032 wrote to memory of 1728	3032	wmm.exe	30
PID 3032 wrote to memory of 1728	3032	wmm.exe	30
PID 3032 wrote to memory of 1112	3032	wmm.exe	32
PID 3032 wrote to memory of 1112	3032	wmm.exe	32
PID 3032 wrote to memory of 1112	3032	wmm.exe	32
PID 1112 wrote to memory of 2560	1112	searchindexer.exe	33
PID 1112 wrote to memory of 2560	1112	searchindexer.exe	33
PID 1112 wrote to memory of 2560	1112	searchindexer.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\wmm.exe
"C:\Users\Admin\AppData\Local\Temp\wmm.exe"
1⤵
- Drops file in Program Files directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3032
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "searchindexer" /sc ONLOGON /tr "C:\Program Files\SubDir\searchindexer.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:1728
- C:\Program Files\SubDir\searchindexer.exe
  "C:\Program Files\SubDir\searchindexer.exe"
  2⤵
  - Executes dropped EXE
  - Drops file in Program Files directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1112
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn "searchindexer" /sc ONLOGON /tr "C:\Program Files\SubDir\searchindexer.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2560

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

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Program Files\SubDir\searchindexer.exe

Filesize
3.1MB

MD5
16cd26bec647159bbecaa3eeed061bf0

SHA1
276c745df06dca1dafb9dc6f82717a59b816c99c

SHA256
538962a772724887e06411bdca86db10e9d4ab08147e330b2e7ebc17d796ffeb

SHA512
5f905a129ffe433687fe64732160e9e2064f8a20f0ebeb819e2b536c5de9309805f7d7a0bbbc922b4809ee68480d618c87d34aac2414f8638b431772b860e6c0

Download Submit
memory/1112-10-0x000007FEF55E0000-0x000007FEF5FCC000-memory.dmp

Filesize
9.9MB

Download
memory/1112-9-0x0000000001250000-0x0000000001574000-memory.dmp

Filesize
3.1MB

Download
memory/1112-11-0x000007FEF55E0000-0x000007FEF5FCC000-memory.dmp

Filesize
9.9MB

Download
memory/1112-12-0x000007FEF55E0000-0x000007FEF5FCC000-memory.dmp

Filesize
9.9MB

Download
memory/3032-0-0x000007FEF55E3000-0x000007FEF55E4000-memory.dmp

Filesize
4KB

Download
memory/3032-1-0x00000000013C0000-0x00000000016E4000-memory.dmp

Filesize
3.1MB

Download
memory/3032-2-0x000007FEF55E0000-0x000007FEF5FCC000-memory.dmp

Filesize
9.9MB

Download
memory/3032-8-0x000007FEF55E0000-0x000007FEF5FCC000-memory.dmp

Filesize
9.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads