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 discovery 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 3 IoCs

resource	yara_rule
behavioral1/memory/1728-1-0x0000000000ED0000-0x00000000011F4000-memory.dmp	family_quasar
behavioral1/files/0x0009000000016d0e-7.dat	family_quasar
behavioral1/memory/1156-8-0x0000000000380000-0x00000000006A4000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
1156	svchost.exe

Drops file in System32 directory 5 IoCs

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

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\Debug\WIA\wiatrace.log	WINWORD.EXE

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WINWORD.EXE

Office loads VBA resources, possible macro or embedded object present

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
624	schtasks.exe
2372	schtasks.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2760	WINWORD.EXE

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1728	svchost.exe
Token: SeDebugPrivilege	1156	svchost.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
1156	svchost.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
1156	svchost.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2760	WINWORD.EXE
2760	WINWORD.EXE

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 1728 wrote to memory of 624	1728	svchost.exe	31
PID 1728 wrote to memory of 624	1728	svchost.exe	31
PID 1728 wrote to memory of 624	1728	svchost.exe	31
PID 1728 wrote to memory of 1156	1728	svchost.exe	33
PID 1728 wrote to memory of 1156	1728	svchost.exe	33
PID 1728 wrote to memory of 1156	1728	svchost.exe	33
PID 1156 wrote to memory of 2372	1156	svchost.exe	34
PID 1156 wrote to memory of 2372	1156	svchost.exe	34
PID 1156 wrote to memory of 2372	1156	svchost.exe	34

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:1728
- 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:624
- 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:1156
- - 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:2372

C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE
"C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE" /n "C:\Users\Admin\Desktop\SubmitEnter.docx"
1⤵
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
PID:2760

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

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\Microsoft\Templates\Normal.dotm

Filesize
19KB

MD5
45e3d5713b547775d457eb7048533b00

SHA1
78aacf40a1eb8c712d17efede91f4017eb1137cb

SHA256
46f5858c051171d43f8daf86d613077adfb90f80819a42f151cc74992572eaa9

SHA512
4f4c2b369014085df0b8f81044150a80de6e5ed6228b6a6eafb0ecd8c6f41311ecc303c297e9e3fbbe0d43792518e509cefa8d79a233212b73fcd345707d297d

Download Submit
C:\Windows\system32\systemapps\svchost.exe

Filesize
3.1MB

MD5
27fbdbdac166ee53df824d4e2a1807a0

SHA1
2df4cdbb8cc5861277fbaf1db7790fbd5112137b

SHA256
2c13c16331719db777e6d391eb027e47a12c8e6a0cc36e15d7c4003e841997d1

SHA512
50d5e8309e4a8f00838026b5917c3aed5c7191d9b464e798859251ac55bd5c6b7219811e9be3766a2166dee97cc845e16bfe9a2a7253c0466956b6e656551f14

Download Submit
memory/1156-8-0x0000000000380000-0x00000000006A4000-memory.dmp

Filesize
3.1MB

Download
memory/1156-11-0x000007FEF5E10000-0x000007FEF67FC000-memory.dmp

Filesize
9.9MB

Download
memory/1156-10-0x000007FEF5E10000-0x000007FEF67FC000-memory.dmp

Filesize
9.9MB

Download
memory/1156-12-0x000007FEF5E10000-0x000007FEF67FC000-memory.dmp

Filesize
9.9MB

Download
memory/1728-0-0x000007FEF5E13000-0x000007FEF5E14000-memory.dmp

Filesize
4KB

Download
memory/1728-1-0x0000000000ED0000-0x00000000011F4000-memory.dmp

Filesize
3.1MB

Download
memory/1728-2-0x000007FEF5E10000-0x000007FEF67FC000-memory.dmp

Filesize
9.9MB

Download
memory/1728-9-0x000007FEF5E10000-0x000007FEF67FC000-memory.dmp

Filesize
9.9MB

Download
memory/2760-15-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/2760-48-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads