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 1 IoCs

resource	yara_rule
behavioral2/memory/4232-15-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
1920	workbook.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 5032 set thread context of 4232	5032	5155ec55e5e3c3bba6ce9982f1dd8491a87ce819820b358d6f7388310116d84c.exe	91

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	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	workbook.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	5155ec55e5e3c3bba6ce9982f1dd8491a87ce819820b358d6f7388310116d84c.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
2640	schtasks.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
5032	5155ec55e5e3c3bba6ce9982f1dd8491a87ce819820b358d6f7388310116d84c.exe
5032	5155ec55e5e3c3bba6ce9982f1dd8491a87ce819820b358d6f7388310116d84c.exe
5032	5155ec55e5e3c3bba6ce9982f1dd8491a87ce819820b358d6f7388310116d84c.exe
1920	workbook.exe
1920	workbook.exe
1920	workbook.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	5032	5155ec55e5e3c3bba6ce9982f1dd8491a87ce819820b358d6f7388310116d84c.exe
Token: SeDebugPrivilege	4232	5155ec55e5e3c3bba6ce9982f1dd8491a87ce819820b358d6f7388310116d84c.exe
Token: SeDebugPrivilege	1920	workbook.exe

Suspicious use of WriteProcessMemory 22 IoCs

description	pid	Process	procid_target
PID 5032 wrote to memory of 4232	5032	5155ec55e5e3c3bba6ce9982f1dd8491a87ce819820b358d6f7388310116d84c.exe	91
PID 5032 wrote to memory of 4232	5032	5155ec55e5e3c3bba6ce9982f1dd8491a87ce819820b358d6f7388310116d84c.exe	91
PID 5032 wrote to memory of 4232	5032	5155ec55e5e3c3bba6ce9982f1dd8491a87ce819820b358d6f7388310116d84c.exe	91
PID 5032 wrote to memory of 4232	5032	5155ec55e5e3c3bba6ce9982f1dd8491a87ce819820b358d6f7388310116d84c.exe	91
PID 5032 wrote to memory of 4232	5032	5155ec55e5e3c3bba6ce9982f1dd8491a87ce819820b358d6f7388310116d84c.exe	91
PID 5032 wrote to memory of 4232	5032	5155ec55e5e3c3bba6ce9982f1dd8491a87ce819820b358d6f7388310116d84c.exe	91
PID 5032 wrote to memory of 4232	5032	5155ec55e5e3c3bba6ce9982f1dd8491a87ce819820b358d6f7388310116d84c.exe	91
PID 5032 wrote to memory of 4232	5032	5155ec55e5e3c3bba6ce9982f1dd8491a87ce819820b358d6f7388310116d84c.exe	91
PID 4232 wrote to memory of 2640	4232	5155ec55e5e3c3bba6ce9982f1dd8491a87ce819820b358d6f7388310116d84c.exe	92
PID 4232 wrote to memory of 2640	4232	5155ec55e5e3c3bba6ce9982f1dd8491a87ce819820b358d6f7388310116d84c.exe	92
PID 4232 wrote to memory of 2640	4232	5155ec55e5e3c3bba6ce9982f1dd8491a87ce819820b358d6f7388310116d84c.exe	92
PID 4232 wrote to memory of 1920	4232	5155ec55e5e3c3bba6ce9982f1dd8491a87ce819820b358d6f7388310116d84c.exe	94
PID 4232 wrote to memory of 1920	4232	5155ec55e5e3c3bba6ce9982f1dd8491a87ce819820b358d6f7388310116d84c.exe	94
PID 4232 wrote to memory of 1920	4232	5155ec55e5e3c3bba6ce9982f1dd8491a87ce819820b358d6f7388310116d84c.exe	94
PID 1920 wrote to memory of 4372	1920	workbook.exe	95
PID 1920 wrote to memory of 4372	1920	workbook.exe	95
PID 1920 wrote to memory of 4372	1920	workbook.exe	95
PID 1920 wrote to memory of 4372	1920	workbook.exe	95
PID 1920 wrote to memory of 4372	1920	workbook.exe	95
PID 1920 wrote to memory of 4372	1920	workbook.exe	95
PID 1920 wrote to memory of 4372	1920	workbook.exe	95
PID 1920 wrote to memory of 4372	1920	workbook.exe	95

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:5032
- C:\Users\Admin\AppData\Local\Temp\5155ec55e5e3c3bba6ce9982f1dd8491a87ce819820b358d6f7388310116d84c.exe
  "C:\Users\Admin\AppData\Local\Temp\5155ec55e5e3c3bba6ce9982f1dd8491a87ce819820b358d6f7388310116d84c.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4232
- - 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:2640
- - 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:1920
  - - C:\Users\Admin\AppData\Roaming\SubDir\workbook.exe
      "C:\Users\Admin\AppData\Roaming\SubDir\workbook.exe"
      4⤵
      PID:4372

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

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\5155ec55e5e3c3bba6ce9982f1dd8491a87ce819820b358d6f7388310116d84c.exe.log

Filesize
1KB

MD5
7c595450dcf2a984d2deb9792f73ba69

SHA1
68aec7aa9e58281ff873437d76b1fd936901dedc

SHA256
10544a899e35901801fd5bc5582941d0edbb48c0b5dd596d2039a54f11a2c73b

SHA512
4bd032e6f4794d85f5c695263c03a875225754b5f13c51401be95abfbc061a5010a1c40f1acc03d05d6a83b82c636f13cf8cdf2443eb964260373f7204ec359f

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

Filesize
5.5MB

MD5
d5d0ab15509bcf177cb90288d995c308

SHA1
a5403d62a5d76fdb50c4d9f76b9dccb97336c4c4

SHA256
5155ec55e5e3c3bba6ce9982f1dd8491a87ce819820b358d6f7388310116d84c

SHA512
e6104bae9160eae1e11f0b737d6eb451fd9a65552ebc09e9a65f8a1646623b3ca2b2e53279413b14444876bc58960e714a29a45633dc43bd48d020c500a31293

Download Submit
memory/1920-30-0x00000000749B0000-0x0000000075160000-memory.dmp

Filesize
7.7MB

Download
memory/1920-29-0x0000000007320000-0x0000000007674000-memory.dmp

Filesize
3.3MB

Download
memory/1920-28-0x0000000000DC0000-0x000000000134C000-memory.dmp

Filesize
5.5MB

Download
memory/1920-27-0x00000000749B0000-0x0000000075160000-memory.dmp

Filesize
7.7MB

Download
memory/4232-15-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/4232-26-0x00000000749B0000-0x0000000075160000-memory.dmp

Filesize
7.7MB

Download
memory/4232-19-0x00000000749B0000-0x0000000075160000-memory.dmp

Filesize
7.7MB

Download
memory/4232-18-0x00000000749B0000-0x0000000075160000-memory.dmp

Filesize
7.7MB

Download
memory/5032-6-0x00000000749B0000-0x0000000075160000-memory.dmp

Filesize
7.7MB

Download
memory/5032-9-0x00000000749BE000-0x00000000749BF000-memory.dmp

Filesize
4KB

Download
memory/5032-12-0x00000000749B0000-0x0000000075160000-memory.dmp

Filesize
7.7MB

Download
memory/5032-13-0x00000000058C0000-0x00000000058DA000-memory.dmp

Filesize
104KB

Download
memory/5032-14-0x0000000004CF0000-0x0000000004CF6000-memory.dmp

Filesize
24KB

Download
memory/5032-10-0x00000000749B0000-0x0000000075160000-memory.dmp

Filesize
7.7MB

Download
memory/5032-17-0x00000000749B0000-0x0000000075160000-memory.dmp

Filesize
7.7MB

Download
memory/5032-11-0x00000000749B0000-0x0000000075160000-memory.dmp

Filesize
7.7MB

Download
memory/5032-8-0x00000000056D0000-0x000000000576E000-memory.dmp

Filesize
632KB

Download
memory/5032-7-0x0000000006A70000-0x0000000006DC4000-memory.dmp

Filesize
3.3MB

Download
memory/5032-0-0x00000000749BE000-0x00000000749BF000-memory.dmp

Filesize
4KB

Download
memory/5032-5-0x0000000005280000-0x000000000528A000-memory.dmp

Filesize
40KB

Download
memory/5032-4-0x00000000053A0000-0x0000000005432000-memory.dmp

Filesize
584KB

Download
memory/5032-3-0x0000000005950000-0x0000000005EF4000-memory.dmp

Filesize
5.6MB

Download
memory/5032-2-0x0000000005300000-0x000000000539C000-memory.dmp

Filesize
624KB

Download
memory/5032-1-0x0000000000D00000-0x000000000128C000-memory.dmp

Filesize
5.5MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads