quasar | 0ccd3733183706222509eb6d435010dbe60044b3f7c57bf70e2f78fa09ef8c24

General

Target

BoostrapperNew (1).exe
Size

3.1MB
MD5

5fa769f4592c691e1032917470a56012
SHA1

bc38e42f098176062b7ccd2bf92d3bf8b1893a78
SHA256

0ccd3733183706222509eb6d435010dbe60044b3f7c57bf70e2f78fa09ef8c24
SHA512

cd71cfb5a14070e1721a6557e7860affc6ae6d7c3067042e3d12e7b49bcdf0e630855362bb988180b8d781574205388fdc185158ed12ea9b4369100a628564ae
SSDEEP

49152:mv2I22SsaNYfdPBldt698dBcjHVrRJ6cbR3LoGdxjTHHB72eh2NT:mvb22SsaNYfdPBldt6+dBcjHVrRJ6m

Score

10^/10

quasar office04 discovery spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

192.168.1.236:4782

Mutex

b796139d-9ac7-4dd6-b216-9d23cb27a8cf

Attributes

encryption_key
A32C977AF70FAC39329AA4FE677FAA9E5BEB3D7E
install_name
BoostrapperNew.exe
log_directory
Logs
reconnect_delay
3000
startup_key
WIN32
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/1976-1-0x00000000000F0000-0x0000000000414000-memory.dmp	family_quasar
behavioral2/files/0x000d000000023cb6-5.dat	family_quasar

Downloads MZ/PE file 1 IoCs

flow	pid	Process
36	4384	Process not Found

Executes dropped EXE 1 IoCs

pid	Process
3680	BoostrapperNew.exe

System Location Discovery: System Language Discovery 1 TTPs 1 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	MicrosoftEdgeUpdate.exe

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
440	MicrosoftEdgeUpdate.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
2288	schtasks.exe
1512	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1976	BoostrapperNew (1).exe
Token: SeDebugPrivilege	3680	BoostrapperNew.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3680	BoostrapperNew.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1976 wrote to memory of 2288	1976	BoostrapperNew (1).exe	89
PID 1976 wrote to memory of 2288	1976	BoostrapperNew (1).exe	89
PID 1976 wrote to memory of 3680	1976	BoostrapperNew (1).exe	91
PID 1976 wrote to memory of 3680	1976	BoostrapperNew (1).exe	91
PID 3680 wrote to memory of 1512	3680	BoostrapperNew.exe	92
PID 3680 wrote to memory of 1512	3680	BoostrapperNew.exe	92

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\BoostrapperNew (1).exe
"C:\Users\Admin\AppData\Local\Temp\BoostrapperNew (1).exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1976
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "WIN32" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\BoostrapperNew.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2288
- C:\Users\Admin\AppData\Roaming\SubDir\BoostrapperNew.exe
  "C:\Users\Admin\AppData\Roaming\SubDir\BoostrapperNew.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3680
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "WIN32" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\BoostrapperNew.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:1512

C:\Program Files (x86)\Microsoft\EdgeUpdate\MicrosoftEdgeUpdate.exe
"C:\Program Files (x86)\Microsoft\EdgeUpdate\MicrosoftEdgeUpdate.exe" /ping PD94bWwgdmVyc2lvbj0iMS4wIiBlbmNvZGluZz0iVVRGLTgiPz48cmVxdWVzdCBwcm90b2NvbD0iMy4wIiB1cGRhdGVyPSJPbWFoYSIgdXBkYXRlcnZlcnNpb249IjEuMy4xOTUuNDMiIHNoZWxsX3ZlcnNpb249IjEuMy4xOTUuNDMiIGlzbWFjaGluZT0iMSIgc2Vzc2lvbmlkPSJ7MzU0Njk3NzEtRDczRS00MEVELTgyN0ItNzczRUNGRUYyQjU1fSIgdXNlcmlkPSJ7RDI1N0FENzUtNkYwOS00NURBLTg3MjktODQwMzAyM0VGNEZEfSIgaW5zdGFsbHNvdXJjZT0ibGltaXRlZCIgcmVxdWVzdGlkPSJ7OUI4QUVENDQtNEJCNi00MEMzLUFERUQtRjI2RjE0MkNBMUYzfSIgZGVkdXA9ImNyIiBkb21haW5qb2luZWQ9IjAiPjxodyBsb2dpY2FsX2NwdXM9IjIiIHBoeXNtZW1vcnk9IjQiIGRpc2tfdHlwZT0iMiIgc3NlPSIxIiBzc2UyPSIxIiBzc2UzPSIxIiBzc3NlMz0iMSIgc3NlNDE9IjEiIHNzZTQyPSIxIiBhdng9IjEiLz48b3MgcGxhdGZvcm09IndpbiIgdmVyc2lvbj0iMTAuMC4xOTA0MS4xMjg4IiBzcD0iIiBhcmNoPSJ4NjQiIHByb2R1Y3RfdHlwZT0iNDgiIGlzX3dpcD0iMCIgaXNfaW5fbG9ja2Rvd25fbW9kZT0iMCIvPjxvZW0gcHJvZHVjdF9tYW51ZmFjdHVyZXI9IiIgcHJvZHVjdF9uYW1lPSIiLz48ZXhwIGV0YWc9IiZxdW90O0UreGJBejZZNnNVMTI4OWJTNnFsNFZSTGJramZCVUdUTUpzanJIcjQ0aUk9JnF1b3Q7Ii8-PGFwcCBhcHBpZD0iezhBNjlEMzQ1LUQ1NjQtNDYzYy1BRkYxLUE2OUQ5RTUzMEY5Nn0iIHZlcnNpb249IjEyMy4wLjYzMTIuMTIzIiBuZXh0dmVyc2lvbj0iIiBsYW5nPSJlbiIgYnJhbmQ9IkdHTFMiIGNsaWVudD0iIiBpbnN0YWxsYWdlPSIyIiBpbnN0YWxsZGF0ZXRpbWU9IjE3Mzg5NDU4MTUiIG9vYmVfaW5zdGFsbF90aW1lPSIxMzM4MzQxODE1MzQzMTAwMDAiPjxldmVudCBldmVudHR5cGU9IjMxIiBldmVudHJlc3VsdD0iMSIgZXJyb3Jjb2RlPSIwIiBleHRyYWNvZGUxPSIyMTc5ODYyIiBzeXN0ZW1fdXB0aW1lX3RpY2tzPSI1MjA3NzI4MjU5Ii8-PC9hcHA-PC9yZXF1ZXN0Pg
1⤵
- System Location Discovery: System Language Discovery
- System Network Configuration Discovery: Internet Connection Discovery
PID:440

C:\Windows\System32\rundll32.exe
C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
1⤵
PID:1848

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

1

T1012

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

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\Roaming\SubDir\BoostrapperNew.exe

Filesize
3.1MB

MD5
5fa769f4592c691e1032917470a56012

SHA1
bc38e42f098176062b7ccd2bf92d3bf8b1893a78

SHA256
0ccd3733183706222509eb6d435010dbe60044b3f7c57bf70e2f78fa09ef8c24

SHA512
cd71cfb5a14070e1721a6557e7860affc6ae6d7c3067042e3d12e7b49bcdf0e630855362bb988180b8d781574205388fdc185158ed12ea9b4369100a628564ae

Download Submit
memory/1976-0-0x00007FFB98883000-0x00007FFB98885000-memory.dmp

Filesize
8KB

Download
memory/1976-1-0x00000000000F0000-0x0000000000414000-memory.dmp

Filesize
3.1MB

Download
memory/1976-2-0x00007FFB98880000-0x00007FFB99341000-memory.dmp

Filesize
10.8MB

Download
memory/1976-8-0x00007FFB98880000-0x00007FFB99341000-memory.dmp

Filesize
10.8MB

Download
memory/3680-9-0x00007FFB98880000-0x00007FFB99341000-memory.dmp

Filesize
10.8MB

Download
memory/3680-10-0x00007FFB98880000-0x00007FFB99341000-memory.dmp

Filesize
10.8MB

Download
memory/3680-11-0x0000000002CD0000-0x0000000002D20000-memory.dmp

Filesize
320KB

Download
memory/3680-12-0x000000001BF70000-0x000000001C022000-memory.dmp

Filesize
712KB

Download
memory/3680-13-0x00007FFB98880000-0x00007FFB99341000-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