quasar | 34724d55cdb275b2ddebae16b7b493468a0a3662f6d4fc3ddb071e9d4fcc520b

General

Target

34724d55cdb275b2ddebae16b7b493468a0a3662f6d4fc3ddb071e9d4fcc520b.exe
Size

3.8MB
MD5

e16816239c10837fdaf0d3d5febc4525
SHA1

b662a2201f17dc73c80034bb02a31cfe2d954dcd
SHA256

34724d55cdb275b2ddebae16b7b493468a0a3662f6d4fc3ddb071e9d4fcc520b
SHA512

faccb111fa03181cc9d1dab0f312821facb549465bb3adba8e0772c09b67758f31ff9ac5be786abc5881f3edfc5c9492448fddbf89a82256c3207072f966d9c2
SSDEEP

98304:O723YzTXNjOel1CI7f1qxBefg4+gVXCQCbSZUJ5Kg:O72ozzcel1CI7fNI4trCb7Kg

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/1720-11-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar

Executes dropped EXE 2 IoCs

Processes:

workbook.exeworkbook.exe

pid process

2784 workbook.exe
872 workbook.exe

pid	process
2784	workbook.exe
872	workbook.exe

Suspicious use of SetThreadContext 2 IoCs

Processes:

34724d55cdb275b2ddebae16b7b493468a0a3662f6d4fc3ddb071e9d4fcc520b.exeworkbook.exe

description	pid	process	target process
PID 1124 set thread context of 1720	1124	34724d55cdb275b2ddebae16b7b493468a0a3662f6d4fc3ddb071e9d4fcc520b.exe	34724d55cdb275b2ddebae16b7b493468a0a3662f6d4fc3ddb071e9d4fcc520b.exe
PID 2784 set thread context of 872	2784	workbook.exe	workbook.exe

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:

schtasks.exeworkbook.exeworkbook.exeschtasks.exe34724d55cdb275b2ddebae16b7b493468a0a3662f6d4fc3ddb071e9d4fcc520b.exe34724d55cdb275b2ddebae16b7b493468a0a3662f6d4fc3ddb071e9d4fcc520b.exe

description	ioc	process
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	workbook.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	34724d55cdb275b2ddebae16b7b493468a0a3662f6d4fc3ddb071e9d4fcc520b.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	34724d55cdb275b2ddebae16b7b493468a0a3662f6d4fc3ddb071e9d4fcc520b.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

1748 schtasks.exe
3024 schtasks.exe

pid	process
1748	schtasks.exe
3024	schtasks.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

34724d55cdb275b2ddebae16b7b493468a0a3662f6d4fc3ddb071e9d4fcc520b.exe

pid	process
1124	34724d55cdb275b2ddebae16b7b493468a0a3662f6d4fc3ddb071e9d4fcc520b.exe
1124	34724d55cdb275b2ddebae16b7b493468a0a3662f6d4fc3ddb071e9d4fcc520b.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

34724d55cdb275b2ddebae16b7b493468a0a3662f6d4fc3ddb071e9d4fcc520b.exe34724d55cdb275b2ddebae16b7b493468a0a3662f6d4fc3ddb071e9d4fcc520b.exeworkbook.exe

description	pid	process
Token: SeDebugPrivilege	1124	34724d55cdb275b2ddebae16b7b493468a0a3662f6d4fc3ddb071e9d4fcc520b.exe
Token: SeDebugPrivilege	1720	34724d55cdb275b2ddebae16b7b493468a0a3662f6d4fc3ddb071e9d4fcc520b.exe
Token: SeDebugPrivilege	872	workbook.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

workbook.exe

pid process

872 workbook.exe

pid	process
872	workbook.exe

Suspicious use of WriteProcessMemory 28 IoCs

Processes:

34724d55cdb275b2ddebae16b7b493468a0a3662f6d4fc3ddb071e9d4fcc520b.exe34724d55cdb275b2ddebae16b7b493468a0a3662f6d4fc3ddb071e9d4fcc520b.exeworkbook.exeworkbook.exe

description	pid	process	target process
PID 1124 wrote to memory of 1304	1124	34724d55cdb275b2ddebae16b7b493468a0a3662f6d4fc3ddb071e9d4fcc520b.exe	34724d55cdb275b2ddebae16b7b493468a0a3662f6d4fc3ddb071e9d4fcc520b.exe
PID 1124 wrote to memory of 1304	1124	34724d55cdb275b2ddebae16b7b493468a0a3662f6d4fc3ddb071e9d4fcc520b.exe	34724d55cdb275b2ddebae16b7b493468a0a3662f6d4fc3ddb071e9d4fcc520b.exe
PID 1124 wrote to memory of 1304	1124	34724d55cdb275b2ddebae16b7b493468a0a3662f6d4fc3ddb071e9d4fcc520b.exe	34724d55cdb275b2ddebae16b7b493468a0a3662f6d4fc3ddb071e9d4fcc520b.exe
PID 1124 wrote to memory of 1720	1124	34724d55cdb275b2ddebae16b7b493468a0a3662f6d4fc3ddb071e9d4fcc520b.exe	34724d55cdb275b2ddebae16b7b493468a0a3662f6d4fc3ddb071e9d4fcc520b.exe
PID 1124 wrote to memory of 1720	1124	34724d55cdb275b2ddebae16b7b493468a0a3662f6d4fc3ddb071e9d4fcc520b.exe	34724d55cdb275b2ddebae16b7b493468a0a3662f6d4fc3ddb071e9d4fcc520b.exe
PID 1124 wrote to memory of 1720	1124	34724d55cdb275b2ddebae16b7b493468a0a3662f6d4fc3ddb071e9d4fcc520b.exe	34724d55cdb275b2ddebae16b7b493468a0a3662f6d4fc3ddb071e9d4fcc520b.exe
PID 1124 wrote to memory of 1720	1124	34724d55cdb275b2ddebae16b7b493468a0a3662f6d4fc3ddb071e9d4fcc520b.exe	34724d55cdb275b2ddebae16b7b493468a0a3662f6d4fc3ddb071e9d4fcc520b.exe
PID 1124 wrote to memory of 1720	1124	34724d55cdb275b2ddebae16b7b493468a0a3662f6d4fc3ddb071e9d4fcc520b.exe	34724d55cdb275b2ddebae16b7b493468a0a3662f6d4fc3ddb071e9d4fcc520b.exe
PID 1124 wrote to memory of 1720	1124	34724d55cdb275b2ddebae16b7b493468a0a3662f6d4fc3ddb071e9d4fcc520b.exe	34724d55cdb275b2ddebae16b7b493468a0a3662f6d4fc3ddb071e9d4fcc520b.exe
PID 1124 wrote to memory of 1720	1124	34724d55cdb275b2ddebae16b7b493468a0a3662f6d4fc3ddb071e9d4fcc520b.exe	34724d55cdb275b2ddebae16b7b493468a0a3662f6d4fc3ddb071e9d4fcc520b.exe
PID 1124 wrote to memory of 1720	1124	34724d55cdb275b2ddebae16b7b493468a0a3662f6d4fc3ddb071e9d4fcc520b.exe	34724d55cdb275b2ddebae16b7b493468a0a3662f6d4fc3ddb071e9d4fcc520b.exe
PID 1720 wrote to memory of 3024	1720	34724d55cdb275b2ddebae16b7b493468a0a3662f6d4fc3ddb071e9d4fcc520b.exe	schtasks.exe
PID 1720 wrote to memory of 3024	1720	34724d55cdb275b2ddebae16b7b493468a0a3662f6d4fc3ddb071e9d4fcc520b.exe	schtasks.exe
PID 1720 wrote to memory of 3024	1720	34724d55cdb275b2ddebae16b7b493468a0a3662f6d4fc3ddb071e9d4fcc520b.exe	schtasks.exe
PID 1720 wrote to memory of 2784	1720	34724d55cdb275b2ddebae16b7b493468a0a3662f6d4fc3ddb071e9d4fcc520b.exe	workbook.exe
PID 1720 wrote to memory of 2784	1720	34724d55cdb275b2ddebae16b7b493468a0a3662f6d4fc3ddb071e9d4fcc520b.exe	workbook.exe
PID 1720 wrote to memory of 2784	1720	34724d55cdb275b2ddebae16b7b493468a0a3662f6d4fc3ddb071e9d4fcc520b.exe	workbook.exe
PID 2784 wrote to memory of 872	2784	workbook.exe	workbook.exe
PID 2784 wrote to memory of 872	2784	workbook.exe	workbook.exe
PID 2784 wrote to memory of 872	2784	workbook.exe	workbook.exe
PID 2784 wrote to memory of 872	2784	workbook.exe	workbook.exe
PID 2784 wrote to memory of 872	2784	workbook.exe	workbook.exe
PID 2784 wrote to memory of 872	2784	workbook.exe	workbook.exe
PID 2784 wrote to memory of 872	2784	workbook.exe	workbook.exe
PID 2784 wrote to memory of 872	2784	workbook.exe	workbook.exe
PID 872 wrote to memory of 1748	872	workbook.exe	schtasks.exe
PID 872 wrote to memory of 1748	872	workbook.exe	schtasks.exe
PID 872 wrote to memory of 1748	872	workbook.exe	schtasks.exe

C:\Users\Admin\AppData\Local\Temp\34724d55cdb275b2ddebae16b7b493468a0a3662f6d4fc3ddb071e9d4fcc520b.exe
"C:\Users\Admin\AppData\Local\Temp\34724d55cdb275b2ddebae16b7b493468a0a3662f6d4fc3ddb071e9d4fcc520b.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1124
- C:\Users\Admin\AppData\Local\Temp\34724d55cdb275b2ddebae16b7b493468a0a3662f6d4fc3ddb071e9d4fcc520b.exe
  "C:\Users\Admin\AppData\Local\Temp\34724d55cdb275b2ddebae16b7b493468a0a3662f6d4fc3ddb071e9d4fcc520b.exe"
  2⤵
  PID:1304
- C:\Users\Admin\AppData\Local\Temp\34724d55cdb275b2ddebae16b7b493468a0a3662f6d4fc3ddb071e9d4fcc520b.exe
  "C:\Users\Admin\AppData\Local\Temp\34724d55cdb275b2ddebae16b7b493468a0a3662f6d4fc3ddb071e9d4fcc520b.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1720
- - 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:3024
- - 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:2784
  - - 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:872
    - - 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:1748

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

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\34724d55cdb275b2ddebae16b7b493468a0a3662f6d4fc3ddb071e9d4fcc520b.exe.log

Filesize
1KB

MD5
8ec831f3e3a3f77e4a7b9cd32b48384c

SHA1
d83f09fd87c5bd86e045873c231c14836e76a05c

SHA256
7667e538030e3f8ce2886e47a01af24cb0ea70528b1e821c5d8832c5076cb982

SHA512
26bffa2406b66368bd412bf25869a792631455645992cdcade2dbc13a2e56fb546414a6a9223b94c96c38d89187add6678d4779a88b38b0c9e36be8527b213c3

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

Filesize
3.8MB

MD5
e16816239c10837fdaf0d3d5febc4525

SHA1
b662a2201f17dc73c80034bb02a31cfe2d954dcd

SHA256
34724d55cdb275b2ddebae16b7b493468a0a3662f6d4fc3ddb071e9d4fcc520b

SHA512
faccb111fa03181cc9d1dab0f312821facb549465bb3adba8e0772c09b67758f31ff9ac5be786abc5881f3edfc5c9492448fddbf89a82256c3207072f966d9c2

Download Submit
memory/872-32-0x0000000006E30000-0x0000000006EE2000-memory.dmp

Filesize
712KB

Download
memory/872-31-0x0000000006BC0000-0x0000000006C10000-memory.dmp

Filesize
320KB

Download
memory/872-30-0x0000000007080000-0x0000000007698000-memory.dmp

Filesize
6.1MB

Download
memory/1124-6-0x0000000005810000-0x00000000058AC000-memory.dmp

Filesize
624KB

Download
memory/1124-15-0x0000000074D60000-0x0000000075510000-memory.dmp

Filesize
7.7MB

Download
memory/1124-7-0x0000000074D6E000-0x0000000074D6F000-memory.dmp

Filesize
4KB

Download
memory/1124-8-0x0000000074D60000-0x0000000075510000-memory.dmp

Filesize
7.7MB

Download
memory/1124-9-0x00000000059B0000-0x00000000059CC000-memory.dmp

Filesize
112KB

Download
memory/1124-10-0x000000000A300000-0x000000000A666000-memory.dmp

Filesize
3.4MB

Download
memory/1124-1-0x0000000000750000-0x0000000000B24000-memory.dmp

Filesize
3.8MB

Download
memory/1124-5-0x0000000005520000-0x000000000552A000-memory.dmp

Filesize
40KB

Download
memory/1124-2-0x0000000005B10000-0x00000000060B4000-memory.dmp

Filesize
5.6MB

Download
memory/1124-0-0x0000000074D6E000-0x0000000074D6F000-memory.dmp

Filesize
4KB

Download
memory/1124-3-0x0000000005560000-0x00000000055F2000-memory.dmp

Filesize
584KB

Download
memory/1124-4-0x0000000074D60000-0x0000000075510000-memory.dmp

Filesize
7.7MB

Download
memory/1720-22-0x0000000074D60000-0x0000000075510000-memory.dmp

Filesize
7.7MB

Download
memory/1720-16-0x0000000074D60000-0x0000000075510000-memory.dmp

Filesize
7.7MB

Download
memory/1720-14-0x0000000074D60000-0x0000000075510000-memory.dmp

Filesize
7.7MB

Download
memory/1720-11-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/2784-23-0x0000000074D60000-0x0000000075510000-memory.dmp

Filesize
7.7MB

Download
memory/2784-24-0x0000000074D60000-0x0000000075510000-memory.dmp

Filesize
7.7MB

Download
memory/2784-25-0x0000000074D60000-0x0000000075510000-memory.dmp

Filesize
7.7MB

Download
memory/2784-29-0x0000000074D60000-0x0000000075510000-memory.dmp

Filesize
7.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads