quasar | e3ceb8681f33e2b9f491550e166dc72c1325581861927272895ba017941a7034

General

Target

Client-built.exe
Size

3.1MB
MD5

3010b26c30afcedafd065d7ed0f367fb
SHA1

8a0a354949de514c29839f597fec207384b8addb
SHA256

e3ceb8681f33e2b9f491550e166dc72c1325581861927272895ba017941a7034
SHA512

db95784c69baefc73d08715bd3efa4ebcffecab906c2a94c681bdef627f8d47a73a4d1616b3156fbb0484be758c73989bcd9efe94aa96a8c5b69ed2fb060300f
SSDEEP

49152:rvnI22SsaNYfdPBldt698dBcjHeCRJ6obR3LoGd4fHTHHB72eh2NT:rvI22SsaNYfdPBldt6+dBcjHeCRJ6CI

Score

10^/10

quasar office04 discovery spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

table-hon.gl.at.ply.gg:44654

Mutex

303304a0-34b4-436d-ad5b-84bd789784c4

Attributes

encryption_key
1E172C9B0BC2084D3120C199CF3C28EC683D69A1
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
System 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

resource	yara_rule
behavioral2/memory/4916-1-0x0000000000060000-0x0000000000384000-memory.dmp	family_quasar
behavioral2/files/0x000d000000023d05-6.dat	family_quasar

Downloads MZ/PE file 1 IoCs

flow	pid	Process
46	4412	Process not Found

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2573923862-3221519550-2669654151-1000\Control Panel\International\Geo\Nation	Client.exe

Executes dropped EXE 1 IoCs

pid	Process
3068	Client.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

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 2 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
2428	MicrosoftEdgeUpdate.exe
4304	PING.EXE

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4304	PING.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
2808	schtasks.exe
2188	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4916	Client-built.exe
Token: SeDebugPrivilege	3068	Client.exe

Suspicious use of FindShellTrayWindow 3 IoCs

pid	Process
3068	Client.exe
3068	Client.exe
3068	Client.exe

Suspicious use of SendNotifyMessage 3 IoCs

pid	Process
3068	Client.exe
3068	Client.exe
3068	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3068	Client.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 4916 wrote to memory of 2808	4916	Client-built.exe	89
PID 4916 wrote to memory of 2808	4916	Client-built.exe	89
PID 4916 wrote to memory of 3068	4916	Client-built.exe	91
PID 4916 wrote to memory of 3068	4916	Client-built.exe	91
PID 3068 wrote to memory of 2188	3068	Client.exe	92
PID 3068 wrote to memory of 2188	3068	Client.exe	92
PID 3068 wrote to memory of 4840	3068	Client.exe	95
PID 3068 wrote to memory of 4840	3068	Client.exe	95
PID 3068 wrote to memory of 768	3068	Client.exe	97
PID 3068 wrote to memory of 768	3068	Client.exe	97
PID 768 wrote to memory of 5104	768	cmd.exe	99
PID 768 wrote to memory of 5104	768	cmd.exe	99
PID 768 wrote to memory of 4304	768	cmd.exe	100
PID 768 wrote to memory of 4304	768	cmd.exe	100

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\Client-built.exe
"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4916
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "System Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2808
- C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
  "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3068
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "System Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2188
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /delete /tn "System Client Startup" /f
    3⤵
    PID:4840
- - C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\2LQIyHVM1xip.bat" "
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:768
  - - C:\Windows\system32\chcp.com
      chcp 65001
      4⤵
      PID:5104
  - - C:\Windows\system32\PING.EXE
      ping -n 10 localhost
      4⤵
      System Network Configuration Discovery: Internet Connection Discovery
      Runs ping.exe
      PID:4304

C:\Program Files (x86)\Microsoft\EdgeUpdate\MicrosoftEdgeUpdate.exe
"C:\Program Files (x86)\Microsoft\EdgeUpdate\MicrosoftEdgeUpdate.exe" /ping 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-PGFwcCBhcHBpZD0iezhBNjlEMzQ1LUQ1NjQtNDYzYy1BRkYxLUE2OUQ5RTUzMEY5Nn0iIHZlcnNpb249IjEyMy4wLjYzMTIuMTIzIiBuZXh0dmVyc2lvbj0iIiBsYW5nPSJlbiIgYnJhbmQ9IkdHTFMiIGNsaWVudD0iIiBpbnN0YWxsYWdlPSIyIiBpbnN0YWxsZGF0ZXRpbWU9IjE3Mzg5NDU4MTUiIG9vYmVfaW5zdGFsbF90aW1lPSIxMzM4MzQxODE1MzQzMTAwMDAiPjxldmVudCBldmVudHR5cGU9IjMxIiBldmVudHJlc3VsdD0iMSIgZXJyb3Jjb2RlPSIwIiBleHRyYWNvZGUxPSIyMTc5ODYyIiBzeXN0ZW1fdXB0aW1lX3RpY2tzPSI1MjY1NjgzMjg5Ii8-PC9hcHA-PC9yZXF1ZXN0Pg
1⤵
- System Location Discovery: System Language Discovery
- System Network Configuration Discovery: Internet Connection Discovery
PID:2428

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

2

T1012

Remote System Discovery

1

T1018

System Information Discovery

2

T1082

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

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\2LQIyHVM1xip.bat

Filesize
211B

MD5
c738964c7f1f4871248bfb2ebc4e49c2

SHA1
57a6489f3d7a948d7bb6789afc9f1db35bec1f96

SHA256
2a84e4dbced8ec09bbaa7dea3b216232c84869f7349227508ccdde8fb61b1cc4

SHA512
1757e71524c62157988e4799ef3608ca5d560f234036ccdc3455f2d95fa5735502df9bf15338ff0589381f6aaf41fbca4a86414bdff01a5f154f80a43f60b0f3

Download Submit
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe

Filesize
3.1MB

MD5
3010b26c30afcedafd065d7ed0f367fb

SHA1
8a0a354949de514c29839f597fec207384b8addb

SHA256
e3ceb8681f33e2b9f491550e166dc72c1325581861927272895ba017941a7034

SHA512
db95784c69baefc73d08715bd3efa4ebcffecab906c2a94c681bdef627f8d47a73a4d1616b3156fbb0484be758c73989bcd9efe94aa96a8c5b69ed2fb060300f

Download Submit
memory/3068-11-0x00007FF9BA560000-0x00007FF9BB021000-memory.dmp

Filesize
10.8MB

Download
memory/3068-10-0x00007FF9BA560000-0x00007FF9BB021000-memory.dmp

Filesize
10.8MB

Download
memory/3068-12-0x000000001BE60000-0x000000001BEB0000-memory.dmp

Filesize
320KB

Download
memory/3068-13-0x000000001BF70000-0x000000001C022000-memory.dmp

Filesize
712KB

Download
memory/3068-14-0x000000001BED0000-0x000000001BEE2000-memory.dmp

Filesize
72KB

Download
memory/3068-15-0x000000001BF30000-0x000000001BF6C000-memory.dmp

Filesize
240KB

Download
memory/3068-16-0x00007FF9BA560000-0x00007FF9BB021000-memory.dmp

Filesize
10.8MB

Download
memory/3068-17-0x00007FF9BA560000-0x00007FF9BB021000-memory.dmp

Filesize
10.8MB

Download
memory/3068-22-0x00007FF9BA560000-0x00007FF9BB021000-memory.dmp

Filesize
10.8MB

Download
memory/4916-2-0x00007FF9BA560000-0x00007FF9BB021000-memory.dmp

Filesize
10.8MB

Download
memory/4916-9-0x00007FF9BA560000-0x00007FF9BB021000-memory.dmp

Filesize
10.8MB

Download
memory/4916-0-0x00007FF9BA563000-0x00007FF9BA565000-memory.dmp

Filesize
8KB

Download
memory/4916-1-0x0000000000060000-0x0000000000384000-memory.dmp

Filesize
3.1MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads