quasar | 96c634c1e1c36808ad958b40621d8c7a13c6547ab74a5c9ccb6244a116d78116

General

Target

96c634c1e1c36808ad958b40621d8c7a13c6547ab74a5c9ccb6244a116d78116N.exe
Size

4.8MB
MD5

ab3645924d8778ff67010227f5ca5e00
SHA1

1e51f15f3f0b6c44b12eb21e50cfb8886ffd7e8a
SHA256

96c634c1e1c36808ad958b40621d8c7a13c6547ab74a5c9ccb6244a116d78116
SHA512

a6df667e691213fae398a701f083c0011f2d98aff78795aa71ea4b3f94f0781c83d109c889f9ff14f8e729428cdfb07bb235c21d52b0a90cd51be763fea0192d
SSDEEP

98304:8vkNM5qKvr22SsaNYfdPBldt6+dBcjHtKRJ6BgIbzZ2IbzZY:lCM7jGIrXK

Score

10^/10

quasar office04 discovery spyware trojan upx

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

mx5.deitie.asia:4495

Mutex

ebbf737a-dddd-43dd-9b0a-74831302455d

Attributes

encryption_key
F8516D89A1DFD78BD8FF575BBC3AE828B47FF0E1
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Quasar Client Startup
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
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sign.exe	family_quasar
behavioral2/memory/3424-5-0x0000000000070000-0x0000000000394000-memory.dmp	family_quasar

Drops startup file 1 IoCs

Processes:

96c634c1e1c36808ad958b40621d8c7a13c6547ab74a5c9ccb6244a116d78116N.exe

description	ioc	process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sign.exe	96c634c1e1c36808ad958b40621d8c7a13c6547ab74a5c9ccb6244a116d78116N.exe

Executes dropped EXE 2 IoCs

Processes:

sign.exeClient.exe

pid process

3424 sign.exe
4712 Client.exe

pid	process
3424	sign.exe
4712	Client.exe

UPX packed file 27 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

Processes:

resource	yara_rule
behavioral2/memory/1840-17-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/1840-15-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/1840-8-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/1840-31-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/1840-54-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/1840-53-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/1840-52-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/1840-49-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/1840-47-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/1840-45-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/1840-43-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/1840-42-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/1840-39-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/1840-37-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/1840-35-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/1840-33-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/1840-29-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/1840-27-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/1840-26-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/1840-23-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/1840-21-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/1840-19-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/1840-13-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/1840-10-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/1840-11-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/1840-9-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/1840-63-0x0000000010000000-0x000000001003E000-memory.dmp	upx

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

Processes:

96c634c1e1c36808ad958b40621d8c7a13c6547ab74a5c9ccb6244a116d78116N.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	96c634c1e1c36808ad958b40621d8c7a13c6547ab74a5c9ccb6244a116d78116N.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

Processes:

schtasks.exeschtasks.exe

pid process

756 schtasks.exe
4980 schtasks.exe

pid	process
756	schtasks.exe
4980	schtasks.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

96c634c1e1c36808ad958b40621d8c7a13c6547ab74a5c9ccb6244a116d78116N.exe

pid	process
1840	96c634c1e1c36808ad958b40621d8c7a13c6547ab74a5c9ccb6244a116d78116N.exe
1840	96c634c1e1c36808ad958b40621d8c7a13c6547ab74a5c9ccb6244a116d78116N.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

sign.exeClient.exe

description pid process

Token: SeDebugPrivilege 3424 sign.exe
Token: SeDebugPrivilege 4712 Client.exe

description	pid	process
Token: SeDebugPrivilege	3424	sign.exe
Token: SeDebugPrivilege	4712	Client.exe

Suspicious use of SetWindowsHookEx 3 IoCs

Processes:

96c634c1e1c36808ad958b40621d8c7a13c6547ab74a5c9ccb6244a116d78116N.exe

pid	process
1840	96c634c1e1c36808ad958b40621d8c7a13c6547ab74a5c9ccb6244a116d78116N.exe
1840	96c634c1e1c36808ad958b40621d8c7a13c6547ab74a5c9ccb6244a116d78116N.exe
1840	96c634c1e1c36808ad958b40621d8c7a13c6547ab74a5c9ccb6244a116d78116N.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

96c634c1e1c36808ad958b40621d8c7a13c6547ab74a5c9ccb6244a116d78116N.exesign.exeClient.exe

description	pid	process	target process
PID 1840 wrote to memory of 3424	1840	96c634c1e1c36808ad958b40621d8c7a13c6547ab74a5c9ccb6244a116d78116N.exe	sign.exe
PID 1840 wrote to memory of 3424	1840	96c634c1e1c36808ad958b40621d8c7a13c6547ab74a5c9ccb6244a116d78116N.exe	sign.exe
PID 3424 wrote to memory of 756	3424	sign.exe	schtasks.exe
PID 3424 wrote to memory of 756	3424	sign.exe	schtasks.exe
PID 3424 wrote to memory of 4712	3424	sign.exe	Client.exe
PID 3424 wrote to memory of 4712	3424	sign.exe	Client.exe
PID 4712 wrote to memory of 4980	4712	Client.exe	schtasks.exe
PID 4712 wrote to memory of 4980	4712	Client.exe	schtasks.exe

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\96c634c1e1c36808ad958b40621d8c7a13c6547ab74a5c9ccb6244a116d78116N.exe
"C:\Users\Admin\AppData\Local\Temp\96c634c1e1c36808ad958b40621d8c7a13c6547ab74a5c9ccb6244a116d78116N.exe"
1⤵
- Drops startup file
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1840
- C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sign.exe
  "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\\sign.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3424
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:756
- - C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
    "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:4712
  - - C:\Windows\SYSTEM32\schtasks.exe
      "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
      4⤵
      Scheduled Task/Job: Scheduled Task
      PID:4980

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sign.exe

Filesize
3.1MB

MD5
7498d554976744dfbd271ba755c6c192

SHA1
ec733d01e776518e387d2f51d1a6559b81f03b1e

SHA256
44089202623b9671051aa5bba5e72f81f68ce818c3054dde57726aaa6dcb9ff7

SHA512
d4e987d0e6235001fac4ae3a634e8fe98c6830e26a6a6876fbc36262842688d3ec301cff75003d2af695cdfd357ac50919946695b7d5d3293ebcba97153e1030

Download Submit
memory/1840-42-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/1840-19-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/1840-63-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/1840-39-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/1840-15-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/1840-8-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/1840-31-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/1840-37-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/1840-53-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/1840-9-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/1840-52-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/1840-49-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/1840-47-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/1840-35-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/1840-43-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/1840-11-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/1840-17-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/1840-54-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/1840-45-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/1840-33-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/1840-29-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/1840-27-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/1840-26-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/1840-23-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/1840-21-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/1840-10-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/1840-13-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/3424-5-0x0000000000070000-0x0000000000394000-memory.dmp

Filesize
3.1MB

Download
memory/3424-4-0x00007FF9D50D3000-0x00007FF9D50D5000-memory.dmp

Filesize
8KB

Download
memory/3424-60-0x00007FF9D50D0000-0x00007FF9D5B91000-memory.dmp

Filesize
10.8MB

Download
memory/3424-6-0x00007FF9D50D0000-0x00007FF9D5B91000-memory.dmp

Filesize
10.8MB

Download
memory/4712-61-0x000000001B330000-0x000000001B380000-memory.dmp

Filesize
320KB

Download
memory/4712-62-0x000000001BCB0000-0x000000001BD62000-memory.dmp

Filesize
712KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads