quasar | 4b35788594f482786143f276de0942d2f73c416c8e0b1d104e848187cb604749

General

Target

4b35788594f482786143f276de0942d2f73c416c8e0b1d104e848187cb604749.exe
Size

3.7MB
MD5

10543f9aaa9c0bf4085301bc7614ac20
SHA1

1561a634d02baaa557032b40f95b191deedb67d0
SHA256

4b35788594f482786143f276de0942d2f73c416c8e0b1d104e848187cb604749
SHA512

320dae470f3b5ad983b55fbaeb437daed163cea4a5166dd7c606012d9f21cb516b15d91e171469a594cf2522a71b0af367fe0b3c94cd9e2432570858280ec55e
SSDEEP

98304:FOH+wWNUsUX/WWxvy0GzbNPFZACmedrm:cewYUXX/TxvSzj5/

Score

10^/10

quasar code discovery spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

CODE

C2

twart.myfirewall.org:9792

rency.ydns.eu:5287

wqo9.firewall-gateway.de:8841

Mutex

02351e291-5d041-4fa37-932c7-869aeiQec514992

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 family
quasar

Quasar payload 1 IoCs

Processes:

resource	yara_rule
behavioral2/memory/5052-11-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar

Executes dropped EXE 2 IoCs

Processes:

workbook.exeworkbook.exe

pid	Process
3116	workbook.exe
3084	workbook.exe

Suspicious use of SetThreadContext 2 IoCs

Processes:

4b35788594f482786143f276de0942d2f73c416c8e0b1d104e848187cb604749.exeworkbook.exe

description	pid	Process	procid_target
PID 3012 set thread context of 5052	3012	4b35788594f482786143f276de0942d2f73c416c8e0b1d104e848187cb604749.exe	94
PID 3116 set thread context of 3084	3116	workbook.exe	100

System Location Discovery: System Language Discovery 1 TTPs 6 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

Processes:

workbook.exeworkbook.exeschtasks.exe4b35788594f482786143f276de0942d2f73c416c8e0b1d104e848187cb604749.exe4b35788594f482786143f276de0942d2f73c416c8e0b1d104e848187cb604749.exeschtasks.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	workbook.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	workbook.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	4b35788594f482786143f276de0942d2f73c416c8e0b1d104e848187cb604749.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	4b35788594f482786143f276de0942d2f73c416c8e0b1d104e848187cb604749.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.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

Processes:

schtasks.exeschtasks.exe

pid	Process
4264	schtasks.exe
3972	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

4b35788594f482786143f276de0942d2f73c416c8e0b1d104e848187cb604749.exeworkbook.exe

description	pid	Process
Token: SeDebugPrivilege	5052	4b35788594f482786143f276de0942d2f73c416c8e0b1d104e848187cb604749.exe
Token: SeDebugPrivilege	3084	workbook.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

workbook.exe

pid	Process
3084	workbook.exe

Suspicious use of WriteProcessMemory 25 IoCs

Processes:

4b35788594f482786143f276de0942d2f73c416c8e0b1d104e848187cb604749.exe4b35788594f482786143f276de0942d2f73c416c8e0b1d104e848187cb604749.exeworkbook.exeworkbook.exe

description	pid	Process	procid_target
PID 3012 wrote to memory of 5052	3012	4b35788594f482786143f276de0942d2f73c416c8e0b1d104e848187cb604749.exe	94
PID 3012 wrote to memory of 5052	3012	4b35788594f482786143f276de0942d2f73c416c8e0b1d104e848187cb604749.exe	94
PID 3012 wrote to memory of 5052	3012	4b35788594f482786143f276de0942d2f73c416c8e0b1d104e848187cb604749.exe	94
PID 3012 wrote to memory of 5052	3012	4b35788594f482786143f276de0942d2f73c416c8e0b1d104e848187cb604749.exe	94
PID 3012 wrote to memory of 5052	3012	4b35788594f482786143f276de0942d2f73c416c8e0b1d104e848187cb604749.exe	94
PID 3012 wrote to memory of 5052	3012	4b35788594f482786143f276de0942d2f73c416c8e0b1d104e848187cb604749.exe	94
PID 3012 wrote to memory of 5052	3012	4b35788594f482786143f276de0942d2f73c416c8e0b1d104e848187cb604749.exe	94
PID 3012 wrote to memory of 5052	3012	4b35788594f482786143f276de0942d2f73c416c8e0b1d104e848187cb604749.exe	94
PID 5052 wrote to memory of 4264	5052	4b35788594f482786143f276de0942d2f73c416c8e0b1d104e848187cb604749.exe	95
PID 5052 wrote to memory of 4264	5052	4b35788594f482786143f276de0942d2f73c416c8e0b1d104e848187cb604749.exe	95
PID 5052 wrote to memory of 4264	5052	4b35788594f482786143f276de0942d2f73c416c8e0b1d104e848187cb604749.exe	95
PID 5052 wrote to memory of 3116	5052	4b35788594f482786143f276de0942d2f73c416c8e0b1d104e848187cb604749.exe	97
PID 5052 wrote to memory of 3116	5052	4b35788594f482786143f276de0942d2f73c416c8e0b1d104e848187cb604749.exe	97
PID 5052 wrote to memory of 3116	5052	4b35788594f482786143f276de0942d2f73c416c8e0b1d104e848187cb604749.exe	97
PID 3116 wrote to memory of 3084	3116	workbook.exe	100
PID 3116 wrote to memory of 3084	3116	workbook.exe	100
PID 3116 wrote to memory of 3084	3116	workbook.exe	100
PID 3116 wrote to memory of 3084	3116	workbook.exe	100
PID 3116 wrote to memory of 3084	3116	workbook.exe	100
PID 3116 wrote to memory of 3084	3116	workbook.exe	100
PID 3116 wrote to memory of 3084	3116	workbook.exe	100
PID 3116 wrote to memory of 3084	3116	workbook.exe	100
PID 3084 wrote to memory of 3972	3084	workbook.exe	101
PID 3084 wrote to memory of 3972	3084	workbook.exe	101
PID 3084 wrote to memory of 3972	3084	workbook.exe	101

C:\Users\Admin\AppData\Local\Temp\4b35788594f482786143f276de0942d2f73c416c8e0b1d104e848187cb604749.exe
"C:\Users\Admin\AppData\Local\Temp\4b35788594f482786143f276de0942d2f73c416c8e0b1d104e848187cb604749.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3012
- C:\Users\Admin\AppData\Local\Temp\4b35788594f482786143f276de0942d2f73c416c8e0b1d104e848187cb604749.exe
  "C:\Users\Admin\AppData\Local\Temp\4b35788594f482786143f276de0942d2f73c416c8e0b1d104e848187cb604749.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:5052
- - 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:4264
- - C:\Users\Admin\AppData\Roaming\SubDir\workbook.exe
    "C:\Users\Admin\AppData\Roaming\SubDir\workbook.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:3116
  - - C:\Users\Admin\AppData\Roaming\SubDir\workbook.exe
      "C:\Users\Admin\AppData\Roaming\SubDir\workbook.exe"
      4⤵
      Executes dropped EXE
      System Location Discovery: System Language Discovery
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of SetWindowsHookEx
      Suspicious use of WriteProcessMemory
      PID:3084
    - - C:\Windows\SysWOW64\schtasks.exe
        
        "schtasks" /create /tn "workbook" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\workbook.exe" /rl HIGHEST /f
        5⤵
        System Location Discovery: System Language Discovery
        Scheduled Task/Job: Scheduled Task
        
        PID:3972

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\4b35788594f482786143f276de0942d2f73c416c8e0b1d104e848187cb604749.exe.log

Filesize
1KB

MD5
8ec831f3e3a3f77e4a7b9cd32b48384c

SHA1
d83f09fd87c5bd86e045873c231c14836e76a05c

SHA256
7667e538030e3f8ce2886e47a01af24cb0ea70528b1e821c5d8832c5076cb982

SHA512
26bffa2406b66368bd412bf25869a792631455645992cdcade2dbc13a2e56fb546414a6a9223b94c96c38d89187add6678d4779a88b38b0c9e36be8527b213c3

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

Filesize
3.7MB

MD5
10543f9aaa9c0bf4085301bc7614ac20

SHA1
1561a634d02baaa557032b40f95b191deedb67d0

SHA256
4b35788594f482786143f276de0942d2f73c416c8e0b1d104e848187cb604749

SHA512
320dae470f3b5ad983b55fbaeb437daed163cea4a5166dd7c606012d9f21cb516b15d91e171469a594cf2522a71b0af367fe0b3c94cd9e2432570858280ec55e

Download Submit
memory/3012-8-0x0000000006F60000-0x0000000006F7C000-memory.dmp

Filesize
112KB

Download
memory/3012-9-0x000000000AD40000-0x000000000B0A6000-memory.dmp

Filesize
3.4MB

Download
memory/3012-4-0x0000000075190000-0x0000000075940000-memory.dmp

Filesize
7.7MB

Download
memory/3012-5-0x0000000005E60000-0x0000000005E6A000-memory.dmp

Filesize
40KB

Download
memory/3012-6-0x000000007519E000-0x000000007519F000-memory.dmp

Filesize
4KB

Download
memory/3012-7-0x0000000075190000-0x0000000075940000-memory.dmp

Filesize
7.7MB

Download
memory/3012-0-0x000000007519E000-0x000000007519F000-memory.dmp

Filesize
4KB

Download
memory/3012-3-0x0000000005CA0000-0x0000000005D32000-memory.dmp

Filesize
584KB

Download
memory/3012-10-0x000000000F030000-0x000000000F0CC000-memory.dmp

Filesize
624KB

Download
memory/3012-1-0x0000000000F10000-0x00000000012CA000-memory.dmp

Filesize
3.7MB

Download
memory/3012-2-0x0000000006160000-0x0000000006704000-memory.dmp

Filesize
5.6MB

Download
memory/3012-14-0x0000000075190000-0x0000000075940000-memory.dmp

Filesize
7.7MB

Download
memory/3084-32-0x0000000006980000-0x0000000006F98000-memory.dmp

Filesize
6.1MB

Download
memory/3084-33-0x0000000006520000-0x0000000006570000-memory.dmp

Filesize
320KB

Download
memory/3084-34-0x0000000006790000-0x0000000006842000-memory.dmp

Filesize
712KB

Download
memory/3116-23-0x0000000075190000-0x0000000075940000-memory.dmp

Filesize
7.7MB

Download
memory/3116-24-0x0000000075190000-0x0000000075940000-memory.dmp

Filesize
7.7MB

Download
memory/3116-25-0x0000000075190000-0x0000000075940000-memory.dmp

Filesize
7.7MB

Download
memory/3116-26-0x000000000AF50000-0x000000000B2B6000-memory.dmp

Filesize
3.4MB

Download
memory/3116-31-0x0000000075190000-0x0000000075940000-memory.dmp

Filesize
7.7MB

Download
memory/5052-22-0x0000000075190000-0x0000000075940000-memory.dmp

Filesize
7.7MB

Download
memory/5052-15-0x0000000075190000-0x0000000075940000-memory.dmp

Filesize
7.7MB

Download
memory/5052-13-0x0000000075190000-0x0000000075940000-memory.dmp

Filesize
7.7MB

Download
memory/5052-11-0x0000000000400000-0x0000000000724000-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