quasar | 7ce80a4a4932516cf8163f73c85537e621b0a1e1a0c0fda41da1f71b1867dfc6

General

Target

0x0007000000012117-5.exe
Size

3.1MB
MD5

e456f2449b504e6af29acb9c1e0ebd25
SHA1

4680b936eca2d5a88cbeed164b54a0b12f138892
SHA256

7ce80a4a4932516cf8163f73c85537e621b0a1e1a0c0fda41da1f71b1867dfc6
SHA512

ffe8788bae2143eb5b68f57edb3ded569bc1e75390bc48a7eb92e65a95688d34229039001d80f717f1c14e650fe94c01ec6e9438dac045af17569dc6811ab281
SSDEEP

49152:6vht62XlaSFNWPjljiFa2RoUYI71JO7hbvJ+ToGdATHHB72eh2NT:6vL62XlaSFNWPjljiFXRoUYIch2

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

83.168.110.87:4782

Mutex

e7550a93-a385-490f-a2f8-5d9e1b5fd98b

Attributes

encryption_key
19FB99CC4D38C38330C88E623B7FD5B15277B769
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
puttystart
subdirectory
SubDir

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/4020-1-0x0000000000ED0000-0x00000000011F4000-memory.dmp	family_quasar
behavioral2/files/0x000e000000023bb7-6.dat	family_quasar

Executes dropped EXE 1 IoCs

Processes:

Client.exe

pid	Process
1612	Client.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

Processes:

schtasks.exeschtasks.exe

pid	Process
2192	schtasks.exe
4576	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

0x0007000000012117-5.exeClient.exe

description	pid	Process
Token: SeDebugPrivilege	4020	0x0007000000012117-5.exe
Token: SeDebugPrivilege	1612	Client.exe

Suspicious use of FindShellTrayWindow 2 IoCs

Processes:

Client.exe

pid	Process
1612	Client.exe
1612	Client.exe

Suspicious use of SendNotifyMessage 2 IoCs

Processes:

Client.exe

pid	Process
1612	Client.exe
1612	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

Client.exe

pid	Process
1612	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

0x0007000000012117-5.exeClient.exe

description	pid	Process	procid_target
PID 4020 wrote to memory of 2192	4020	0x0007000000012117-5.exe	84
PID 4020 wrote to memory of 2192	4020	0x0007000000012117-5.exe	84
PID 4020 wrote to memory of 1612	4020	0x0007000000012117-5.exe	87
PID 4020 wrote to memory of 1612	4020	0x0007000000012117-5.exe	87
PID 1612 wrote to memory of 4576	1612	Client.exe	90
PID 1612 wrote to memory of 4576	1612	Client.exe	90

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\0x0007000000012117-5.exe
"C:\Users\Admin\AppData\Local\Temp\0x0007000000012117-5.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4020
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "puttystart" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2192
- C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
  "C:\Users\Admin\AppData\Roaming\SubDir\Client.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:1612
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "puttystart" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:4576

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\Roaming\SubDir\Client.exe

Filesize
3.1MB

MD5
e456f2449b504e6af29acb9c1e0ebd25

SHA1
4680b936eca2d5a88cbeed164b54a0b12f138892

SHA256
7ce80a4a4932516cf8163f73c85537e621b0a1e1a0c0fda41da1f71b1867dfc6

SHA512
ffe8788bae2143eb5b68f57edb3ded569bc1e75390bc48a7eb92e65a95688d34229039001d80f717f1c14e650fe94c01ec6e9438dac045af17569dc6811ab281

Download Submit
memory/1612-10-0x00007FF8DBAB0000-0x00007FF8DC571000-memory.dmp

Filesize
10.8MB

Download
memory/1612-11-0x00007FF8DBAB0000-0x00007FF8DC571000-memory.dmp

Filesize
10.8MB

Download
memory/1612-12-0x000000001C8D0000-0x000000001C920000-memory.dmp

Filesize
320KB

Download
memory/1612-13-0x000000001C9E0000-0x000000001CA92000-memory.dmp

Filesize
712KB

Download
memory/1612-16-0x000000001C960000-0x000000001C972000-memory.dmp

Filesize
72KB

Download
memory/1612-17-0x000000001D0E0000-0x000000001D11C000-memory.dmp

Filesize
240KB

Download
memory/1612-18-0x00007FF8DBAB0000-0x00007FF8DC571000-memory.dmp

Filesize
10.8MB

Download
memory/4020-0-0x00007FF8DBAB3000-0x00007FF8DBAB5000-memory.dmp

Filesize
8KB

Download
memory/4020-1-0x0000000000ED0000-0x00000000011F4000-memory.dmp

Filesize
3.1MB

Download
memory/4020-2-0x00007FF8DBAB0000-0x00007FF8DC571000-memory.dmp

Filesize
10.8MB

Download
memory/4020-9-0x00007FF8DBAB0000-0x00007FF8DC571000-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