quasar | 1a5f35980c44bc927abe47bef7435177f44f0d8a4c7632a6de4024e2716e85e0

General

Target

1a5f35980c44bc927abe47bef7435177f44f0d8a4c7632a6de4024e2716e85e0.exe
Size

3.1MB
MD5

fe9288f31b98a1d42d805ceba700fb39
SHA1

208a5912e6086a4a3266b9f11346ae77ad8a35ff
SHA256

1a5f35980c44bc927abe47bef7435177f44f0d8a4c7632a6de4024e2716e85e0
SHA512

b9adfd4e75be72198ff06447cd67d8f852625c3ef61eff9247dfd1e4941fae58866debdc4b8aa8921f5c448eec18e3106436896f79b70b47af6e2bdf64ccb2a9
SSDEEP

49152:Vvht62XlaSFNWPjljiFa2RoUYIdqWhybRjPLoGddJfTHHB72eh2NTd:VvL62XlaSFNWPjljiFXRoUYIdqWhWT6

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

192.168.0.17:5555

Mutex

3b1732e2-6a81-44bb-8d99-4472451b1cf3

Attributes

encryption_key
871AD53C1EE1C8F197D53D3E1DCA45CC62B82B8D
install_name
javaconfig.exe
log_directory
Logs
reconnect_delay
3000
startup_key
JavaUpdater
subdirectory
SubDir

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/2756-1-0x0000000000010000-0x0000000000336000-memory.dmp	family_quasar
behavioral1/files/0x0008000000015d7e-6.dat	family_quasar
behavioral1/memory/2820-9-0x0000000000B80000-0x0000000000EA6000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2820	javaconfig.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
2680	schtasks.exe
2256	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2756	1a5f35980c44bc927abe47bef7435177f44f0d8a4c7632a6de4024e2716e85e0.exe
Token: SeDebugPrivilege	2820	javaconfig.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2820	javaconfig.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
2820	javaconfig.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2820	javaconfig.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2756 wrote to memory of 2680	2756	1a5f35980c44bc927abe47bef7435177f44f0d8a4c7632a6de4024e2716e85e0.exe	30
PID 2756 wrote to memory of 2680	2756	1a5f35980c44bc927abe47bef7435177f44f0d8a4c7632a6de4024e2716e85e0.exe	30
PID 2756 wrote to memory of 2680	2756	1a5f35980c44bc927abe47bef7435177f44f0d8a4c7632a6de4024e2716e85e0.exe	30
PID 2756 wrote to memory of 2820	2756	1a5f35980c44bc927abe47bef7435177f44f0d8a4c7632a6de4024e2716e85e0.exe	32
PID 2756 wrote to memory of 2820	2756	1a5f35980c44bc927abe47bef7435177f44f0d8a4c7632a6de4024e2716e85e0.exe	32
PID 2756 wrote to memory of 2820	2756	1a5f35980c44bc927abe47bef7435177f44f0d8a4c7632a6de4024e2716e85e0.exe	32
PID 2820 wrote to memory of 2256	2820	javaconfig.exe	33
PID 2820 wrote to memory of 2256	2820	javaconfig.exe	33
PID 2820 wrote to memory of 2256	2820	javaconfig.exe	33

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\1a5f35980c44bc927abe47bef7435177f44f0d8a4c7632a6de4024e2716e85e0.exe
"C:\Users\Admin\AppData\Local\Temp\1a5f35980c44bc927abe47bef7435177f44f0d8a4c7632a6de4024e2716e85e0.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2756
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "JavaUpdater" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\javaconfig.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2680
- C:\Users\Admin\AppData\Roaming\SubDir\javaconfig.exe
  "C:\Users\Admin\AppData\Roaming\SubDir\javaconfig.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:2820
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn "JavaUpdater" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\javaconfig.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2256

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\SubDir\javaconfig.exe

Filesize
3.1MB

MD5
fe9288f31b98a1d42d805ceba700fb39

SHA1
208a5912e6086a4a3266b9f11346ae77ad8a35ff

SHA256
1a5f35980c44bc927abe47bef7435177f44f0d8a4c7632a6de4024e2716e85e0

SHA512
b9adfd4e75be72198ff06447cd67d8f852625c3ef61eff9247dfd1e4941fae58866debdc4b8aa8921f5c448eec18e3106436896f79b70b47af6e2bdf64ccb2a9

Download Submit
memory/2756-0-0x000007FEF6033000-0x000007FEF6034000-memory.dmp

Filesize
4KB

Download
memory/2756-1-0x0000000000010000-0x0000000000336000-memory.dmp

Filesize
3.1MB

Download
memory/2756-2-0x000007FEF6030000-0x000007FEF6A1C000-memory.dmp

Filesize
9.9MB

Download
memory/2756-8-0x000007FEF6030000-0x000007FEF6A1C000-memory.dmp

Filesize
9.9MB

Download
memory/2820-10-0x000007FEF6030000-0x000007FEF6A1C000-memory.dmp

Filesize
9.9MB

Download
memory/2820-11-0x000007FEF6030000-0x000007FEF6A1C000-memory.dmp

Filesize
9.9MB

Download
memory/2820-9-0x0000000000B80000-0x0000000000EA6000-memory.dmp

Filesize
3.1MB

Download
memory/2820-12-0x000007FEF6030000-0x000007FEF6A1C000-memory.dmp

Filesize
9.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads