quasar | 36581f3e196c43eadec9987659e53639bb90f28f4ddac5640bce04de093ccfeb

General

Target

GENERATE_SEASON.exe
Size

3.2MB
MD5

e7d072887645cbf0597dc6c8f682a4ce
SHA1

f44c400e706f8d201a5e393a441cf29f08247326
SHA256

36581f3e196c43eadec9987659e53639bb90f28f4ddac5640bce04de093ccfeb
SHA512

da11629a4546d33944c25991127c5db0acd6673fee92ff918c1e71317a6ec9eb85fefea2f50f10a7960aacc7533a38d42e6c2d0b330911c54dc4790d33f21468
SSDEEP

49152:avelL26AaNeWgPhlmVqvMQ7XSKWzc2WobvJ/9oGdN1zTHHB72eh2NTZ6u:avOL26AaNeWgPhlmVqkQ7XSKPo3/

Score

10^/10

quasar orbx downloader defense_evasion spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Orbx Downloader

C2

xeidaniyeu-37344.portmap.host:37344

Mutex

61861806-59ce-4798-82be-a1b654aa1c9e

Attributes

encryption_key
B87A6DBC29140772F82018FBEECE64D863C053A2
install_name
Orbx Downloader.exe
log_directory
Logs
reconnect_delay
3000
startup_key
update
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/1608-1-0x0000000000F00000-0x000000000122E000-memory.dmp	family_quasar
behavioral2/files/0x0008000000023c85-5.dat	family_quasar

Disables Task Manager via registry modification
defense_evasion

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-1-5-21-2045521122-590294423-3465680274-1000\Control Panel\International\Geo\Nation	Orbx Downloader.exe

Executes dropped EXE 2 IoCs

pid	Process
2052	Orbx Downloader.exe
2952	501Uw0BmymaV.exe

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

System Information Discovery
T1082

Kills process with taskkill 2 IoCs

defense_evasion

pid	Process
3432	taskkill.exe
4268	taskkill.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
4376	schtasks.exe
2356	schtasks.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	1608	GENERATE_SEASON.exe
Token: SeDebugPrivilege	2052	Orbx Downloader.exe
Token: SeDebugPrivilege	3432	taskkill.exe
Token: SeDebugPrivilege	4268	taskkill.exe
Token: 33	1636	AUDIODG.EXE
Token: SeIncBasePriorityPrivilege	1636	AUDIODG.EXE

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2052	Orbx Downloader.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 1608 wrote to memory of 4376	1608	GENERATE_SEASON.exe	85
PID 1608 wrote to memory of 4376	1608	GENERATE_SEASON.exe	85
PID 1608 wrote to memory of 2052	1608	GENERATE_SEASON.exe	87
PID 1608 wrote to memory of 2052	1608	GENERATE_SEASON.exe	87
PID 2052 wrote to memory of 2356	2052	Orbx Downloader.exe	88
PID 2052 wrote to memory of 2356	2052	Orbx Downloader.exe	88
PID 2052 wrote to memory of 2952	2052	Orbx Downloader.exe	107
PID 2052 wrote to memory of 2952	2052	Orbx Downloader.exe	107
PID 2952 wrote to memory of 3432	2952	501Uw0BmymaV.exe	108
PID 2952 wrote to memory of 3432	2952	501Uw0BmymaV.exe	108
PID 2952 wrote to memory of 4268	2952	501Uw0BmymaV.exe	110
PID 2952 wrote to memory of 4268	2952	501Uw0BmymaV.exe	110

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\GENERATE_SEASON.exe
"C:\Users\Admin\AppData\Local\Temp\GENERATE_SEASON.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1608
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "update" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Orbx Downloader.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:4376
- C:\Users\Admin\AppData\Roaming\SubDir\Orbx Downloader.exe
  "C:\Users\Admin\AppData\Roaming\SubDir\Orbx Downloader.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2052
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "update" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Orbx Downloader.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2356
- - C:\Users\Admin\AppData\Local\Temp\501Uw0BmymaV.exe
    "C:\Users\Admin\AppData\Local\Temp\501Uw0BmymaV.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of WriteProcessMemory
    PID:2952
  - - C:\Windows\SYSTEM32\taskkill.exe
      taskkill.exe /f /im explorer.exe
      4⤵
      Kills process with taskkill
      Suspicious use of AdjustPrivilegeToken
      PID:3432
  - - C:\Windows\SYSTEM32\taskkill.exe
      taskkill.exe /f /im taskmgr.exe
      4⤵
      Kills process with taskkill
      Suspicious use of AdjustPrivilegeToken
      PID:4268

C:\Windows\system32\AUDIODG.EXE
C:\Windows\system32\AUDIODG.EXE 0x490 0x150
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1636

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

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\501Uw0BmymaV.exe

Filesize
3.0MB

MD5
b6d61b516d41e209b207b41d91e3b90d

SHA1
e50d4b7bf005075cb63d6bd9ad48c92a00ee9444

SHA256
3d0efd55bde5fb7a73817940bac2a901d934b496738b7c5cab7ea0f6228e28fe

SHA512
3217fc904e4c71b399dd273786634a6a6c19064a9bf96960df9b3357001c12b9547813412173149f6185eb5d300492d290342ec955a8347c6f9dcac338c136da

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

Filesize
3.2MB

MD5
e7d072887645cbf0597dc6c8f682a4ce

SHA1
f44c400e706f8d201a5e393a441cf29f08247326

SHA256
36581f3e196c43eadec9987659e53639bb90f28f4ddac5640bce04de093ccfeb

SHA512
da11629a4546d33944c25991127c5db0acd6673fee92ff918c1e71317a6ec9eb85fefea2f50f10a7960aacc7533a38d42e6c2d0b330911c54dc4790d33f21468

Download Submit
memory/1608-10-0x00007FFAF29E0000-0x00007FFAF34A1000-memory.dmp

Filesize
10.8MB

Download
memory/1608-2-0x00007FFAF29E0000-0x00007FFAF34A1000-memory.dmp

Filesize
10.8MB

Download
memory/1608-0-0x00007FFAF29E3000-0x00007FFAF29E5000-memory.dmp

Filesize
8KB

Download
memory/1608-1-0x0000000000F00000-0x000000000122E000-memory.dmp

Filesize
3.2MB

Download
memory/2052-11-0x00007FFAF29E0000-0x00007FFAF34A1000-memory.dmp

Filesize
10.8MB

Download
memory/2052-12-0x000000001C350000-0x000000001C3A0000-memory.dmp

Filesize
320KB

Download
memory/2052-13-0x000000001C460000-0x000000001C512000-memory.dmp

Filesize
712KB

Download
memory/2052-14-0x000000001C3A0000-0x000000001C3B2000-memory.dmp

Filesize
72KB

Download
memory/2052-15-0x000000001C400000-0x000000001C43C000-memory.dmp

Filesize
240KB

Download
memory/2052-16-0x00007FFAF29E0000-0x00007FFAF34A1000-memory.dmp

Filesize
10.8MB

Download
memory/2052-9-0x00007FFAF29E0000-0x00007FFAF34A1000-memory.dmp

Filesize
10.8MB

Download
memory/2952-28-0x000000001B630000-0x000000001B6D6000-memory.dmp

Filesize
664KB

Download
memory/2952-29-0x000000001BBB0000-0x000000001C07E000-memory.dmp

Filesize
4.8MB

Download
memory/2952-30-0x000000001C180000-0x000000001C21C000-memory.dmp

Filesize
624KB

Download
memory/2952-31-0x0000000001240000-0x0000000001248000-memory.dmp

Filesize
32KB

Download
memory/2952-32-0x000000001C2E0000-0x000000001C32C000-memory.dmp

Filesize
304KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads