quasar | 38be048dda9dfebcea59c2cbf3cf2abb971b96636aefabc8cafa5359efb63bc2

General

Target

Solara V3/SolaraV3.exe
Size

3.1MB
MD5

3db0c6fb25d98ede3749c5c296227708
SHA1

5d7843d185e9d7f56490bd03094f49c1444fa92a
SHA256

604e26e36c395712913a141ef96bc461385eea54d2182d170196dfee458ea82f
SHA512

461df5b25d7d14d340729177a987f254425d0bf57ca6f00853278d7640c40b6e52966a6465c0add70193fce2fc7a66555f1338e6a3f9eb28e85f3f5bab64b452
SSDEEP

49152:xvrI22SsaNYfdPBldt698dBcjHE82wvBx5ZoGdD3THHB72eh2NT:xvU22SsaNYfdPBldt6+dBcjHiwr

Score

10^/10

quasar robot discovery spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

robot

C2

tcp://quasarrat12345-50279.portmap.host:50279

Mutex

5b3b6ef6-1f5c-4cf2-a902-f38fc18c6f74

Attributes

encryption_key
044C06AD5B6394C7D3CCD0919FA2C67D30EA87D4
install_name
SolaraV3.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Windows 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/3240-1-0x0000000000540000-0x0000000000868000-memory.dmp	family_quasar
behavioral2/files/0x0007000000023c7e-6.dat	family_quasar

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-1-5-21-4089630652-1596403869-279772308-1000\Control Panel\International\Geo\Nation	SolaraV3.exe

Executes dropped EXE 1 IoCs

pid	Process
1572	SolaraV3.exe

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

System Information Discovery
T1082

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 1 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
3212	PING.EXE

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
3212	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
3312	schtasks.exe
4620	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3240	SolaraV3.exe
Token: SeDebugPrivilege	1572	SolaraV3.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 3240 wrote to memory of 3312	3240	SolaraV3.exe	82
PID 3240 wrote to memory of 3312	3240	SolaraV3.exe	82
PID 3240 wrote to memory of 1572	3240	SolaraV3.exe	84
PID 3240 wrote to memory of 1572	3240	SolaraV3.exe	84
PID 1572 wrote to memory of 4620	1572	SolaraV3.exe	85
PID 1572 wrote to memory of 4620	1572	SolaraV3.exe	85
PID 1572 wrote to memory of 4344	1572	SolaraV3.exe	87
PID 1572 wrote to memory of 4344	1572	SolaraV3.exe	87
PID 4344 wrote to memory of 440	4344	cmd.exe	89
PID 4344 wrote to memory of 440	4344	cmd.exe	89
PID 4344 wrote to memory of 3212	4344	cmd.exe	90
PID 4344 wrote to memory of 3212	4344	cmd.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\Solara V3\SolaraV3.exe
"C:\Users\Admin\AppData\Local\Temp\Solara V3\SolaraV3.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3240
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "Windows Update" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\SolaraV3.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:3312
- C:\Users\Admin\AppData\Roaming\SubDir\SolaraV3.exe
  "C:\Users\Admin\AppData\Roaming\SubDir\SolaraV3.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1572
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "Windows Update" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\SolaraV3.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:4620
- - C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\vYRqtEfn4awJ.bat" "
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:4344
  - - C:\Windows\system32\chcp.com
      chcp 65001
      4⤵
      PID:440
  - - C:\Windows\system32\PING.EXE
      ping -n 10 localhost
      4⤵
      System Network Configuration Discovery: Internet Connection Discovery
      Runs ping.exe
      PID:3212

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 Network Configuration Discovery

1

T1016

Internet Connection Discovery

1

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\SolaraV3.exe.log

Filesize
1KB

MD5
baf55b95da4a601229647f25dad12878

SHA1
abc16954ebfd213733c4493fc1910164d825cac8

SHA256
ee954c5d8156fd8890e582c716e5758ed9b33721258f10e758bdc31ccbcb1924

SHA512
24f502fedb1a305d0d7b08857ffc1db9b2359ff34e06d5748ecc84e35c985f29a20d9f0a533bea32d234ab37097ec0481620c63b14ac89b280e75e14d19fd545

Download Submit
C:\Users\Admin\AppData\Local\Temp\vYRqtEfn4awJ.bat

Filesize
209B

MD5
17c9cd944a4e108e5fab870570c98af2

SHA1
e21356826b7818f9d669eef50ceb0f4919212feb

SHA256
163fc0ee442a59695d3aaf31d9ae736b80225b7e55dbafe90d466e1f87744ef7

SHA512
07168adcc03c63dc4b97d34fb210f7f55f42e066f652b77e799aba8572a07199068ad2eeaf217390fecee0219d60c1d08b35946ee8decc3ecbbf084d7244c35a

Download Submit
C:\Users\Admin\AppData\Roaming\SubDir\SolaraV3.exe

Filesize
3.1MB

MD5
3db0c6fb25d98ede3749c5c296227708

SHA1
5d7843d185e9d7f56490bd03094f49c1444fa92a

SHA256
604e26e36c395712913a141ef96bc461385eea54d2182d170196dfee458ea82f

SHA512
461df5b25d7d14d340729177a987f254425d0bf57ca6f00853278d7640c40b6e52966a6465c0add70193fce2fc7a66555f1338e6a3f9eb28e85f3f5bab64b452

Download Submit
memory/1572-10-0x00007FFB07750000-0x00007FFB08211000-memory.dmp

Filesize
10.8MB

Download
memory/1572-11-0x00007FFB07750000-0x00007FFB08211000-memory.dmp

Filesize
10.8MB

Download
memory/1572-12-0x000000001AF10000-0x000000001AF60000-memory.dmp

Filesize
320KB

Download
memory/1572-13-0x000000001D0D0000-0x000000001D182000-memory.dmp

Filesize
712KB

Download
memory/1572-18-0x00007FFB07750000-0x00007FFB08211000-memory.dmp

Filesize
10.8MB

Download
memory/3240-0-0x00007FFB07753000-0x00007FFB07755000-memory.dmp

Filesize
8KB

Download
memory/3240-1-0x0000000000540000-0x0000000000868000-memory.dmp

Filesize
3.2MB

Download
memory/3240-2-0x00007FFB07750000-0x00007FFB08211000-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