quasar | 2dac612eb9e1901ccc9dba9b03680a3a330b4084f0aeb8d543f3c7a595644829

General

Target

rat.exe
Size

3.1MB
MD5

0ef2261e6587f8b552ec3da98331ff26
SHA1

7c8a1b9fd589576d1979c5576219e734ce7a0699
SHA256

2dac612eb9e1901ccc9dba9b03680a3a330b4084f0aeb8d543f3c7a595644829
SHA512

ab6363753345ede1b29d8ef3a9592e9febbbb25348d77a2f214a0d7e08301f6596c99fbeb1ee6b62edb426454562dc74657f295a876021bba8610b6f9a9c2e34
SSDEEP

49152:evHI22SsaNYfdPBldt698dBcjHpxDEDw1k/JxQoGdtTHHB72eh2NT:evo22SsaNYfdPBldt6+dBcjHpxW+

Score

10^/10

quasar office01 discovery spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office01

C2

sabaf-38910.portmap.host:38910

Mutex

f7356d60-951e-494a-a901-2e12bb084129

Attributes

encryption_key
5C7AC20AEB149D8BC06141FCF79866AD6E3847AD
install_name
RuntimeBroker.exe
log_directory
Logs
reconnect_delay
3000
startup_key
RunTimeBroker
subdirectory
System32

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/1152-1-0x00000000009A0000-0x0000000000CC4000-memory.dmp	family_quasar
behavioral2/files/0x0008000000023e25-6.dat	family_quasar

Downloads MZ/PE file 1 IoCs

flow	pid	Process
29	4400	Process not Found

Executes dropped EXE 1 IoCs

pid	Process
4788	RuntimeBroker.exe

Drops file in System32 directory 5 IoCs

description	ioc	Process
File created	C:\Windows\system32\System32\RuntimeBroker.exe	rat.exe
File opened for modification	C:\Windows\system32\System32\RuntimeBroker.exe	rat.exe
File opened for modification	C:\Windows\system32\System32	rat.exe
File opened for modification	C:\Windows\system32\System32\RuntimeBroker.exe	RuntimeBroker.exe
File opened for modification	C:\Windows\system32\System32	RuntimeBroker.exe

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	MicrosoftEdgeUpdate.exe

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 1 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
5104	MicrosoftEdgeUpdate.exe

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
4688	schtasks.exe
3332	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1152	rat.exe
Token: SeDebugPrivilege	4788	RuntimeBroker.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4788	RuntimeBroker.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1152 wrote to memory of 4688	1152	rat.exe	90
PID 1152 wrote to memory of 4688	1152	rat.exe	90
PID 1152 wrote to memory of 4788	1152	rat.exe	92
PID 1152 wrote to memory of 4788	1152	rat.exe	92
PID 4788 wrote to memory of 3332	4788	RuntimeBroker.exe	93
PID 4788 wrote to memory of 3332	4788	RuntimeBroker.exe	93

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\rat.exe
"C:\Users\Admin\AppData\Local\Temp\rat.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1152
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "RunTimeBroker" /sc ONLOGON /tr "C:\Windows\system32\System32\RuntimeBroker.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:4688
- C:\Windows\system32\System32\RuntimeBroker.exe
  "C:\Windows\system32\System32\RuntimeBroker.exe"
  2⤵
  - Executes dropped EXE
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4788
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "RunTimeBroker" /sc ONLOGON /tr "C:\Windows\system32\System32\RuntimeBroker.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:3332

C:\Program Files (x86)\Microsoft\EdgeUpdate\MicrosoftEdgeUpdate.exe
"C:\Program Files (x86)\Microsoft\EdgeUpdate\MicrosoftEdgeUpdate.exe" /ping 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-PGFwcCBhcHBpZD0iezhBNjlEMzQ1LUQ1NjQtNDYzYy1BRkYxLUE2OUQ5RTUzMEY5Nn0iIHZlcnNpb249IjEyMy4wLjYzMTIuMTIzIiBuZXh0dmVyc2lvbj0iIiBsYW5nPSJlbiIgYnJhbmQ9IkdHTFMiIGNsaWVudD0iIiBpbnN0YWxsYWdlPSIyIiBpbnN0YWxsZGF0ZXRpbWU9IjE3Mzg5NDU4NjAiIG9vYmVfaW5zdGFsbF90aW1lPSIxMzM4MzQxODIxNjMwOTAwMDAiPjxldmVudCBldmVudHR5cGU9IjMxIiBldmVudHJlc3VsdD0iMSIgZXJyb3Jjb2RlPSIwIiBleHRyYWNvZGUxPSIyMTc5ODYyIiBzeXN0ZW1fdXB0aW1lX3RpY2tzPSI0OTQzOTU4MDYxIi8-PC9hcHA-PC9yZXF1ZXN0Pg
1⤵
- System Location Discovery: System Language Discovery
- System Network Configuration Discovery: Internet Connection Discovery
PID:5104

C:\Windows\System32\rundll32.exe
C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
1⤵
PID:5032

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 Location Discovery

1

T1614

System Language Discovery

1

T1614.001

System Network Configuration Discovery

1

T1016

Internet Connection Discovery

1

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\System32\System32\RuntimeBroker.exe

Filesize
3.1MB

MD5
0ef2261e6587f8b552ec3da98331ff26

SHA1
7c8a1b9fd589576d1979c5576219e734ce7a0699

SHA256
2dac612eb9e1901ccc9dba9b03680a3a330b4084f0aeb8d543f3c7a595644829

SHA512
ab6363753345ede1b29d8ef3a9592e9febbbb25348d77a2f214a0d7e08301f6596c99fbeb1ee6b62edb426454562dc74657f295a876021bba8610b6f9a9c2e34

Download Submit
memory/1152-0-0x00007FFF3F003000-0x00007FFF3F005000-memory.dmp

Filesize
8KB

Download
memory/1152-1-0x00000000009A0000-0x0000000000CC4000-memory.dmp

Filesize
3.1MB

Download
memory/1152-2-0x00007FFF3F000000-0x00007FFF3FAC1000-memory.dmp

Filesize
10.8MB

Download
memory/1152-9-0x00007FFF3F000000-0x00007FFF3FAC1000-memory.dmp

Filesize
10.8MB

Download
memory/4788-10-0x00007FFF3F000000-0x00007FFF3FAC1000-memory.dmp

Filesize
10.8MB

Download
memory/4788-11-0x000000001CD00000-0x000000001CD50000-memory.dmp

Filesize
320KB

Download
memory/4788-12-0x000000001CE10000-0x000000001CEC2000-memory.dmp

Filesize
712KB

Download
memory/4788-13-0x00007FFF3F000000-0x00007FFF3FAC1000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads