quasar | 5155ec55e5e3c3bba6ce9982f1dd8491a87ce819820b358d6f7388310116d84c

General

Target

5155ec55e5e3c3bba6ce9982f1dd8491a87ce819820b358d6f7388310116d84c.exe
Size

5.5MB
MD5

d5d0ab15509bcf177cb90288d995c308
SHA1

a5403d62a5d76fdb50c4d9f76b9dccb97336c4c4
SHA256

5155ec55e5e3c3bba6ce9982f1dd8491a87ce819820b358d6f7388310116d84c
SHA512

e6104bae9160eae1e11f0b737d6eb451fd9a65552ebc09e9a65f8a1646623b3ca2b2e53279413b14444876bc58960e714a29a45633dc43bd48d020c500a31293
SSDEEP

98304:HxwocXthR+h2+TeME4kHggCnRBUEVkcSfNV:wdGfeMej2yjcC

Score

10^/10

quasar pin discovery spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

C2

twart.myfirewall.org:9792

Mutex

02351e291-5d041-4fa37-932c7-869aeec514992

Attributes

encryption_key
3145298725BA5E0DD56E87FFE3F8898EA81E6EDA
install_name
workbook.exe
log_directory
Logs
reconnect_delay
6000
startup_key
workbook
subdirectory
SubDir

Signatures

Quasar RAT
Quasar is an open source Remote Access Tool.
trojan spyware quasar

Quasar payload 5 IoCs

resource	yara_rule
behavioral1/memory/2864-12-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar
behavioral1/memory/2864-11-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar
behavioral1/memory/2864-16-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar
behavioral1/memory/2864-17-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar
behavioral1/memory/2864-20-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2800	workbook.exe

Loads dropped DLL 2 IoCs

pid	Process
2864	5155ec55e5e3c3bba6ce9982f1dd8491a87ce819820b358d6f7388310116d84c.exe
2864	5155ec55e5e3c3bba6ce9982f1dd8491a87ce819820b358d6f7388310116d84c.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2460 set thread context of 2864	2460	5155ec55e5e3c3bba6ce9982f1dd8491a87ce819820b358d6f7388310116d84c.exe	31

System Location Discovery: System Language Discovery 1 TTPs 4 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	5155ec55e5e3c3bba6ce9982f1dd8491a87ce819820b358d6f7388310116d84c.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	5155ec55e5e3c3bba6ce9982f1dd8491a87ce819820b358d6f7388310116d84c.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	workbook.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
1964	schtasks.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2460	5155ec55e5e3c3bba6ce9982f1dd8491a87ce819820b358d6f7388310116d84c.exe
2460	5155ec55e5e3c3bba6ce9982f1dd8491a87ce819820b358d6f7388310116d84c.exe
2460	5155ec55e5e3c3bba6ce9982f1dd8491a87ce819820b358d6f7388310116d84c.exe
2800	workbook.exe
2800	workbook.exe
2800	workbook.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2460	5155ec55e5e3c3bba6ce9982f1dd8491a87ce819820b358d6f7388310116d84c.exe
Token: SeDebugPrivilege	2864	5155ec55e5e3c3bba6ce9982f1dd8491a87ce819820b358d6f7388310116d84c.exe
Token: SeDebugPrivilege	2800	workbook.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 2460 wrote to memory of 2864	2460	5155ec55e5e3c3bba6ce9982f1dd8491a87ce819820b358d6f7388310116d84c.exe	31
PID 2460 wrote to memory of 2864	2460	5155ec55e5e3c3bba6ce9982f1dd8491a87ce819820b358d6f7388310116d84c.exe	31
PID 2460 wrote to memory of 2864	2460	5155ec55e5e3c3bba6ce9982f1dd8491a87ce819820b358d6f7388310116d84c.exe	31
PID 2460 wrote to memory of 2864	2460	5155ec55e5e3c3bba6ce9982f1dd8491a87ce819820b358d6f7388310116d84c.exe	31
PID 2460 wrote to memory of 2864	2460	5155ec55e5e3c3bba6ce9982f1dd8491a87ce819820b358d6f7388310116d84c.exe	31
PID 2460 wrote to memory of 2864	2460	5155ec55e5e3c3bba6ce9982f1dd8491a87ce819820b358d6f7388310116d84c.exe	31
PID 2460 wrote to memory of 2864	2460	5155ec55e5e3c3bba6ce9982f1dd8491a87ce819820b358d6f7388310116d84c.exe	31
PID 2460 wrote to memory of 2864	2460	5155ec55e5e3c3bba6ce9982f1dd8491a87ce819820b358d6f7388310116d84c.exe	31
PID 2460 wrote to memory of 2864	2460	5155ec55e5e3c3bba6ce9982f1dd8491a87ce819820b358d6f7388310116d84c.exe	31
PID 2864 wrote to memory of 1964	2864	5155ec55e5e3c3bba6ce9982f1dd8491a87ce819820b358d6f7388310116d84c.exe	33
PID 2864 wrote to memory of 1964	2864	5155ec55e5e3c3bba6ce9982f1dd8491a87ce819820b358d6f7388310116d84c.exe	33
PID 2864 wrote to memory of 1964	2864	5155ec55e5e3c3bba6ce9982f1dd8491a87ce819820b358d6f7388310116d84c.exe	33
PID 2864 wrote to memory of 1964	2864	5155ec55e5e3c3bba6ce9982f1dd8491a87ce819820b358d6f7388310116d84c.exe	33
PID 2864 wrote to memory of 2800	2864	5155ec55e5e3c3bba6ce9982f1dd8491a87ce819820b358d6f7388310116d84c.exe	35
PID 2864 wrote to memory of 2800	2864	5155ec55e5e3c3bba6ce9982f1dd8491a87ce819820b358d6f7388310116d84c.exe	35
PID 2864 wrote to memory of 2800	2864	5155ec55e5e3c3bba6ce9982f1dd8491a87ce819820b358d6f7388310116d84c.exe	35
PID 2864 wrote to memory of 2800	2864	5155ec55e5e3c3bba6ce9982f1dd8491a87ce819820b358d6f7388310116d84c.exe	35
PID 2800 wrote to memory of 2348	2800	workbook.exe	36
PID 2800 wrote to memory of 2348	2800	workbook.exe	36
PID 2800 wrote to memory of 2348	2800	workbook.exe	36
PID 2800 wrote to memory of 2348	2800	workbook.exe	36
PID 2800 wrote to memory of 2348	2800	workbook.exe	36
PID 2800 wrote to memory of 2348	2800	workbook.exe	36
PID 2800 wrote to memory of 2348	2800	workbook.exe	36
PID 2800 wrote to memory of 2348	2800	workbook.exe	36
PID 2800 wrote to memory of 2348	2800	workbook.exe	36

C:\Users\Admin\AppData\Local\Temp\5155ec55e5e3c3bba6ce9982f1dd8491a87ce819820b358d6f7388310116d84c.exe
"C:\Users\Admin\AppData\Local\Temp\5155ec55e5e3c3bba6ce9982f1dd8491a87ce819820b358d6f7388310116d84c.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2460
- C:\Users\Admin\AppData\Local\Temp\5155ec55e5e3c3bba6ce9982f1dd8491a87ce819820b358d6f7388310116d84c.exe
  "C:\Users\Admin\AppData\Local\Temp\5155ec55e5e3c3bba6ce9982f1dd8491a87ce819820b358d6f7388310116d84c.exe"
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2864
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks" /create /tn "workbook" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\workbook.exe" /rl HIGHEST /f
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:1964
- - C:\Users\Admin\AppData\Roaming\SubDir\workbook.exe
    "C:\Users\Admin\AppData\Roaming\SubDir\workbook.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:2800
  - - C:\Users\Admin\AppData\Roaming\SubDir\workbook.exe
      "C:\Users\Admin\AppData\Roaming\SubDir\workbook.exe"
      4⤵
      PID:2348

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

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

\Users\Admin\AppData\Roaming\SubDir\workbook.exe

Filesize
5.5MB

MD5
d5d0ab15509bcf177cb90288d995c308

SHA1
a5403d62a5d76fdb50c4d9f76b9dccb97336c4c4

SHA256
5155ec55e5e3c3bba6ce9982f1dd8491a87ce819820b358d6f7388310116d84c

SHA512
e6104bae9160eae1e11f0b737d6eb451fd9a65552ebc09e9a65f8a1646623b3ca2b2e53279413b14444876bc58960e714a29a45633dc43bd48d020c500a31293

Download Submit
memory/2348-43-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2460-3-0x0000000004DF0000-0x0000000004E8E000-memory.dmp

Filesize
632KB

Download
memory/2460-15-0x0000000074680000-0x0000000074D6E000-memory.dmp

Filesize
6.9MB

Download
memory/2460-4-0x000000007468E000-0x000000007468F000-memory.dmp

Filesize
4KB

Download
memory/2460-5-0x0000000074680000-0x0000000074D6E000-memory.dmp

Filesize
6.9MB

Download
memory/2460-6-0x0000000074680000-0x0000000074D6E000-memory.dmp

Filesize
6.9MB

Download
memory/2460-7-0x0000000000520000-0x000000000053A000-memory.dmp

Filesize
104KB

Download
memory/2460-8-0x0000000000580000-0x0000000000586000-memory.dmp

Filesize
24KB

Download
memory/2460-2-0x0000000074680000-0x0000000074D6E000-memory.dmp

Filesize
6.9MB

Download
memory/2460-1-0x0000000001190000-0x000000000171C000-memory.dmp

Filesize
5.5MB

Download
memory/2460-0-0x000000007468E000-0x000000007468F000-memory.dmp

Filesize
4KB

Download
memory/2460-22-0x0000000074680000-0x0000000074D6E000-memory.dmp

Filesize
6.9MB

Download
memory/2800-33-0x0000000000340000-0x00000000008CC000-memory.dmp

Filesize
5.5MB

Download
memory/2864-11-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/2864-16-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/2864-17-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/2864-20-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/2864-19-0x0000000074680000-0x0000000074D6E000-memory.dmp

Filesize
6.9MB

Download
memory/2864-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2864-21-0x0000000074680000-0x0000000074D6E000-memory.dmp

Filesize
6.9MB

Download
memory/2864-12-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/2864-34-0x0000000074680000-0x0000000074D6E000-memory.dmp

Filesize
6.9MB

Download
memory/2864-10-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/2864-9-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads