quasar | 54bc877bd313adcbb4f686033605fe37c632b013892f6ab107396c4982f6b740

General

Target

54bc877bd313adcbb4f686033605fe37c632b013892f6ab107396c4982f6b740.exe
Size

3.0MB
MD5

76d3c22ade070633a2ada8c98e7b52a6
SHA1

9f2525fa0b45d6f9e9c39afbc23faa82f7ec1091
SHA256

54bc877bd313adcbb4f686033605fe37c632b013892f6ab107396c4982f6b740
SHA512

3f4b65fc285f20b6aed367d76460bfa5be168a8013e76eeb6ae41da0f718b3b1dba4a852b8089dae804b0ad1e875a52b61db95f11829edbb681de2c66c298e5b
SSDEEP

49152:uJZLe2gk2zjxgEHjykoN0zmQY1QyOrdMFv2ZmffawwEfg:uwhjoN0zmxdWqv2Zmff

Score

10^/10

quasar office365 discovery spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office365

C2

0.0.0.0:4444

Mutex

d7e31ae5-01c9-4ae9-9492-b3417015c4f3

Attributes

encryption_key
C0022A95F8CF0711A4CC81872E320305BE1DA33B
install_name
svchost.exe
log_directory
Logs
reconnect_delay
5000
startup_key
Quasar Client Startup
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/files/0x000a000000023d4d-2.dat	family_quasar
behavioral2/memory/3744-5-0x0000000000D80000-0x00000000010A4000-memory.dmp	family_quasar

Downloads MZ/PE file 1 IoCs

flow	pid	Process
41	3700	Process not Found

Executes dropped EXE 2 IoCs

pid	Process
3744	206466333.scr
2504	svchost.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

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
2140	MicrosoftEdgeUpdate.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3744	206466333.scr
Token: SeDebugPrivilege	2504	svchost.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2504	svchost.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
2504	svchost.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2504	svchost.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2448 wrote to memory of 3744	2448	54bc877bd313adcbb4f686033605fe37c632b013892f6ab107396c4982f6b740.exe	86
PID 2448 wrote to memory of 3744	2448	54bc877bd313adcbb4f686033605fe37c632b013892f6ab107396c4982f6b740.exe	86
PID 3744 wrote to memory of 2504	3744	206466333.scr	90
PID 3744 wrote to memory of 2504	3744	206466333.scr	90

C:\Users\Admin\AppData\Local\Temp\54bc877bd313adcbb4f686033605fe37c632b013892f6ab107396c4982f6b740.exe
"C:\Users\Admin\AppData\Local\Temp\54bc877bd313adcbb4f686033605fe37c632b013892f6ab107396c4982f6b740.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2448
- C:\Users\Admin\AppData\Local\Temp\206466333.scr
  C:\Users\Admin\AppData\Local\Temp\206466333.scr
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3744
- - C:\Users\Admin\AppData\Roaming\SubDir\svchost.exe
    "C:\Users\Admin\AppData\Roaming\SubDir\svchost.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of FindShellTrayWindow
    - Suspicious use of SendNotifyMessage
    - Suspicious use of SetWindowsHookEx
    PID:2504

C:\Program Files (x86)\Microsoft\EdgeUpdate\MicrosoftEdgeUpdate.exe
"C:\Program Files (x86)\Microsoft\EdgeUpdate\MicrosoftEdgeUpdate.exe" /ping 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-PGFwcCBhcHBpZD0iezhBNjlEMzQ1LUQ1NjQtNDYzYy1BRkYxLUE2OUQ5RTUzMEY5Nn0iIHZlcnNpb249IjEyMy4wLjYzMTIuMTIzIiBuZXh0dmVyc2lvbj0iIiBsYW5nPSJlbiIgYnJhbmQ9IkdHTFMiIGNsaWVudD0iIiBpbnN0YWxsYWdlPSIxIiBpbnN0YWxsZGF0ZXRpbWU9IjE3Mzg5NDY4MzAiIG9vYmVfaW5zdGFsbF90aW1lPSIxMzM4MzQxOTE0Njg3NjAwMDAiPjxldmVudCBldmVudHR5cGU9IjMxIiBldmVudHJlc3VsdD0iMSIgZXJyb3Jjb2RlPSIwIiBleHRyYWNvZGUxPSIyMTc5ODYyIiBzeXN0ZW1fdXB0aW1lX3RpY2tzPSI1MTQ4ODA0Nzk3Ii8-PC9hcHA-PC9yZXF1ZXN0Pg
1⤵
- System Location Discovery: System Language Discovery
- System Network Configuration Discovery: Internet Connection Discovery
PID:2140

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

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

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\206466333.scr

Filesize
3.1MB

MD5
f323cd62710e25b97bbd1d8eb459cac0

SHA1
9730d627946475138592de348c9346331070c161

SHA256
1769def10083a6e541dc7eb7f49e0fa0f0d76bb1734bb33734bf209de752743d

SHA512
fd3c9b85f00d35d3fafeeef160f67af25332039e273532f053d7130d2968fb3bd3b787724439ba06ba5501e42d8bd943a574f3102713cb6651da6288e18633ce

Download Submit
memory/2504-12-0x00007FFAAA1D0000-0x00007FFAAAC91000-memory.dmp

Filesize
10.8MB

Download
memory/2504-14-0x000000001D690000-0x000000001D6E0000-memory.dmp

Filesize
320KB

Download
memory/2504-15-0x000000001D7A0000-0x000000001D852000-memory.dmp

Filesize
712KB

Download
memory/2504-16-0x00007FFAAA1D0000-0x00007FFAAAC91000-memory.dmp

Filesize
10.8MB

Download
memory/3744-4-0x00007FFAAA1D3000-0x00007FFAAA1D5000-memory.dmp

Filesize
8KB

Download
memory/3744-5-0x0000000000D80000-0x00000000010A4000-memory.dmp

Filesize
3.1MB

Download
memory/3744-6-0x00007FFAAA1D0000-0x00007FFAAAC91000-memory.dmp

Filesize
10.8MB

Download
memory/3744-13-0x00007FFAAA1D0000-0x00007FFAAAC91000-memory.dmp

Filesize
10.8MB

Download

Analysis

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