quasar | 2c13c16331719db777e6d391eb027e47a12c8e6a0cc36e15d7c4003e841997d1

General

Target

svchost.exe
Size

3.1MB
MD5

27fbdbdac166ee53df824d4e2a1807a0
SHA1

2df4cdbb8cc5861277fbaf1db7790fbd5112137b
SHA256

2c13c16331719db777e6d391eb027e47a12c8e6a0cc36e15d7c4003e841997d1
SHA512

50d5e8309e4a8f00838026b5917c3aed5c7191d9b464e798859251ac55bd5c6b7219811e9be3766a2166dee97cc845e16bfe9a2a7253c0466956b6e656551f14
SSDEEP

49152:vvHI22SsaNYfdPBldt698dBcjHQ2xE1v4LoG/kTHHB72eh2NT:vvo22SsaNYfdPBldt6+dBcjHQ2xH

Score

10^/10

quasar user01 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

User01

C2

hello383-37009.portmap.host:37009

Mutex

108151be-6bee-4922-a809-562bf18e7d5c

Attributes

encryption_key
2CF5E13B7455B67B54A919C41B45066DC7333545
install_name
svchost.exe
log_directory
Logs
reconnect_delay
3000
startup_key
svchost
subdirectory
systemapps

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/1996-1-0x00000000000E0000-0x0000000000404000-memory.dmp	family_quasar
behavioral2/files/0x0007000000023cc2-5.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2708	svchost.exe

Drops file in System32 directory 5 IoCs

description	ioc	Process
File created	C:\Windows\system32\systemapps\svchost.exe	svchost.exe
File opened for modification	C:\Windows\system32\systemapps\svchost.exe	svchost.exe
File opened for modification	C:\Windows\system32\systemapps	svchost.exe
File opened for modification	C:\Windows\system32\systemapps\svchost.exe	svchost.exe
File opened for modification	C:\Windows\system32\systemapps	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

pid	Process
752	schtasks.exe
1272	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1996	svchost.exe
Token: SeDebugPrivilege	2708	svchost.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2708	svchost.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
2708	svchost.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1996 wrote to memory of 752	1996	svchost.exe	85
PID 1996 wrote to memory of 752	1996	svchost.exe	85
PID 1996 wrote to memory of 2708	1996	svchost.exe	87
PID 1996 wrote to memory of 2708	1996	svchost.exe	87
PID 2708 wrote to memory of 1272	2708	svchost.exe	88
PID 2708 wrote to memory of 1272	2708	svchost.exe	88

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\svchost.exe
"C:\Users\Admin\AppData\Local\Temp\svchost.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1996
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "svchost" /sc ONLOGON /tr "C:\Windows\system32\systemapps\svchost.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:752
- C:\Windows\system32\systemapps\svchost.exe
  "C:\Windows\system32\systemapps\svchost.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 WriteProcessMemory
  PID:2708
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "svchost" /sc ONLOGON /tr "C:\Windows\system32\systemapps\svchost.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:1272

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\Local\Microsoft\CLR_v4.0\UsageLogs\svchost.exe.log

Filesize
1KB

MD5
baf55b95da4a601229647f25dad12878

SHA1
abc16954ebfd213733c4493fc1910164d825cac8

SHA256
ee954c5d8156fd8890e582c716e5758ed9b33721258f10e758bdc31ccbcb1924

SHA512
24f502fedb1a305d0d7b08857ffc1db9b2359ff34e06d5748ecc84e35c985f29a20d9f0a533bea32d234ab37097ec0481620c63b14ac89b280e75e14d19fd545

Download Submit
C:\Windows\System32\systemapps\svchost.exe

Filesize
3.1MB

MD5
27fbdbdac166ee53df824d4e2a1807a0

SHA1
2df4cdbb8cc5861277fbaf1db7790fbd5112137b

SHA256
2c13c16331719db777e6d391eb027e47a12c8e6a0cc36e15d7c4003e841997d1

SHA512
50d5e8309e4a8f00838026b5917c3aed5c7191d9b464e798859251ac55bd5c6b7219811e9be3766a2166dee97cc845e16bfe9a2a7253c0466956b6e656551f14

Download Submit
memory/1996-0-0x00007FFC2B240000-0x00007FFC2B340000-memory.dmp

Filesize
1024KB

Download
memory/1996-1-0x00000000000E0000-0x0000000000404000-memory.dmp

Filesize
3.1MB

Download
memory/1996-10-0x00007FFC2B240000-0x00007FFC2B340000-memory.dmp

Filesize
1024KB

Download
memory/2708-9-0x00007FFC2B240000-0x00007FFC2B340000-memory.dmp

Filesize
1024KB

Download
memory/2708-11-0x000000001D620000-0x000000001D670000-memory.dmp

Filesize
320KB

Download
memory/2708-12-0x000000001D730000-0x000000001D7E2000-memory.dmp

Filesize
712KB

Download
memory/2708-13-0x00007FFC2B240000-0x00007FFC2B340000-memory.dmp

Filesize
1024KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads