quasar | 85af420868f937e1d70898ef30664bb62cf3da9eea467191d407eb1f418a67b7

General

Target

celex.exe
Size

3.1MB
MD5

e97bf71664c901e2dd3b02c158d14cc7
SHA1

75827ff9fefcd7bab397d6a7af15f3093e38d1c6
SHA256

85af420868f937e1d70898ef30664bb62cf3da9eea467191d407eb1f418a67b7
SHA512

532b0dcb2027cafb2a568c692360589d855b8c36bcd22b7dfb92c7b71b437e03dc26a55da0c3d0163b3286b9b63980e30d5ebb4d7e5fa6dd2ed3f1aba5f09476
SSDEEP

49152:PvmI22SsaNYfdPBldt698dBcjHpuxNESENk/iJLoGd51THHB72eh2NT:Pvr22SsaNYfdPBldt6+dBcjHMxgZ

Score

10^/10

quasar skid spyware stealer trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

skid

C2

xxvvsn-26169.portmap.host:26169

Mutex

8226deb0-3b7d-44c1-a400-b0a3ce09f515

Attributes

encryption_key
4D464C4B380567B78AB5A85F3161F2F36BAFBE7A
install_name
clnt.exe
log_directory
Logs
reconnect_delay
3000
startup_key
clnt
subdirectory
clnt

Signatures

Quasar RAT
Quasar is an open source Remote Access Tool.
trojan spyware quasar
Quasar family
quasar

Quasar payload 2 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4332-1-0x0000000000F50000-0x0000000001274000-memory.dmp	family_quasar
behavioral2/files/0x000a000000023b85-6.dat	family_quasar

Executes dropped EXE 1 IoCs

Processes:

clnt.exe

pid	Process
4360	clnt.exe

Reads WinSCP keys stored on the system 2 TTPs
Tries to access WinSCP stored sessions.
spyware stealer

Data from Local System
T1005

Credentials in Registry
T1552.002
Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Credentials from Web Browsers
T1555.003
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

Processes:

schtasks.exeschtasks.exe

pid	Process
1816	schtasks.exe
1792	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

celex.execlnt.exe

description	pid	Process
Token: SeDebugPrivilege	4332	celex.exe
Token: SeDebugPrivilege	4360	clnt.exe

Suspicious use of FindShellTrayWindow 4 IoCs

Processes:

clnt.exe

pid	Process
4360	clnt.exe
4360	clnt.exe
4360	clnt.exe
4360	clnt.exe

Suspicious use of SendNotifyMessage 4 IoCs

Processes:

clnt.exe

pid	Process
4360	clnt.exe
4360	clnt.exe
4360	clnt.exe
4360	clnt.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

clnt.exe

pid	Process
4360	clnt.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

celex.execlnt.exe

description	pid	Process	procid_target
PID 4332 wrote to memory of 1816	4332	celex.exe	85
PID 4332 wrote to memory of 1816	4332	celex.exe	85
PID 4332 wrote to memory of 4360	4332	celex.exe	88
PID 4332 wrote to memory of 4360	4332	celex.exe	88
PID 4360 wrote to memory of 1792	4360	clnt.exe	89
PID 4360 wrote to memory of 1792	4360	clnt.exe	89

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\celex.exe
"C:\Users\Admin\AppData\Local\Temp\celex.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4332
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "clnt" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\clnt\clnt.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:1816
- C:\Users\Admin\AppData\Roaming\clnt\clnt.exe
  "C:\Users\Admin\AppData\Roaming\clnt\clnt.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:4360
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "clnt" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\clnt\clnt.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:1792

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

Credentials from Password Stores

1

T1555

Credentials from Web Browsers

1

T1555.003

Unsecured Credentials

2

T1552

Credentials In Files

1

T1552.001

Credentials in Registry

1

T1552.002

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Data from Local System

2

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\clnt\clnt.exe

Filesize
3.1MB

MD5
e97bf71664c901e2dd3b02c158d14cc7

SHA1
75827ff9fefcd7bab397d6a7af15f3093e38d1c6

SHA256
85af420868f937e1d70898ef30664bb62cf3da9eea467191d407eb1f418a67b7

SHA512
532b0dcb2027cafb2a568c692360589d855b8c36bcd22b7dfb92c7b71b437e03dc26a55da0c3d0163b3286b9b63980e30d5ebb4d7e5fa6dd2ed3f1aba5f09476

Download Submit
memory/4332-0-0x00007FFC27F23000-0x00007FFC27F25000-memory.dmp

Filesize
8KB

Download
memory/4332-1-0x0000000000F50000-0x0000000001274000-memory.dmp

Filesize
3.1MB

Download
memory/4332-2-0x00007FFC27F20000-0x00007FFC289E1000-memory.dmp

Filesize
10.8MB

Download
memory/4332-9-0x00007FFC27F20000-0x00007FFC289E1000-memory.dmp

Filesize
10.8MB

Download
memory/4360-13-0x000000001C430000-0x000000001C4E2000-memory.dmp

Filesize
712KB

Download
memory/4360-11-0x00007FFC27F20000-0x00007FFC289E1000-memory.dmp

Filesize
10.8MB

Download
memory/4360-12-0x000000001C320000-0x000000001C370000-memory.dmp

Filesize
320KB

Download
memory/4360-10-0x00007FFC27F20000-0x00007FFC289E1000-memory.dmp

Filesize
10.8MB

Download
memory/4360-16-0x000000001C3B0000-0x000000001C3C2000-memory.dmp

Filesize
72KB

Download
memory/4360-17-0x000000001D030000-0x000000001D06C000-memory.dmp

Filesize
240KB

Download
memory/4360-18-0x00007FFC27F20000-0x00007FFC289E1000-memory.dmp

Filesize
10.8MB

Download
memory/4360-19-0x000000001D470000-0x000000001D619000-memory.dmp

Filesize
1.7MB

Download
memory/4360-20-0x000000001D470000-0x000000001D619000-memory.dmp

Filesize
1.7MB

Download
memory/4360-21-0x000000001D470000-0x000000001D619000-memory.dmp

Filesize
1.7MB

Download
memory/4360-22-0x000000001D470000-0x000000001D619000-memory.dmp

Filesize
1.7MB

Download
memory/4360-23-0x000000001D470000-0x000000001D619000-memory.dmp

Filesize
1.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads