quasar | d8c9255982a5932dbaf224d475d2161d814de36784b797d576e41c263587e20a

Analysis

max time kernel
145s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20230703-en
resource tags

arch:x64arch:x86image:win10v2004-20230703-enlocale:en-usos:windows10-2004-x64system
submitted
04/07/2023, 13:16

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
d8c9255982a5932dbaf224d475d2161d814de36784b797d576e41c263587e20a.exe
Size 4.4MB
Sample230704-qhs1csdc94
SHA256 d8c9255982a5932dbaf224d475d2161d814de36784b797d576e41c263587e20a
MD5 81d087f91c68842c740681f29d0ce55a
SHA1 86d06df7951abf1ec1919ed2ec0fa844588a9ef0
SHA512 aae59963a9b63e5320429abe84319f3277195ad403c3db1a11daf89e84c1acc7d72da9f06c7ae74e4ffd850ee636a6b6c7fd7427158b3e600c83010c015e4955
SSDEEP 98304:8d/SzqloJFCuzwRr8sGf5m/HKjrl2JpINpvfTS:muqlgCuzwOsGfA/Kjx2JpINh
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

1.tcp.eu.ngrok.io:29052

Mutex

16a0343a-339a-47b6-ae3c-9b9a37b0c064

Attributes

encryption_key
78845AEC980AAC2173E990F0E695BFC7CF6CD632
install_name
systemlogfiles.exe
log_directory
Logs
reconnect_delay
3000
startup_key
systemlogfiles.exe
subdirectory
systemlogfiles

Signatures

Quasar RAT
Quasar is an open source Remote Access Tool.
trojan spyware quasar

Quasar payload 1 IoCs

resource	yara_rule
behavioral2/memory/1484-136-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar

Executes dropped EXE 2 IoCs

pid	Process
4692	systemlogfiles.exe
3736	systemlogfiles.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs

Web Service
T1102

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4280 set thread context of 1484	4280	d8c9255982a5932dbaf224d475d2161d814de36784b797d576e41c263587e20a.exe	79
PID 4692 set thread context of 3736	4692	systemlogfiles.exe	83

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

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 2 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task

T1053

pid	Process
532	schtasks.exe
2592	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1484	d8c9255982a5932dbaf224d475d2161d814de36784b797d576e41c263587e20a.exe
Token: SeDebugPrivilege	3736	systemlogfiles.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
3736	systemlogfiles.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
3736	systemlogfiles.exe

Suspicious use of WriteProcessMemory 25 IoCs

description	pid	Process	procid_target
PID 4280 wrote to memory of 1484	4280	d8c9255982a5932dbaf224d475d2161d814de36784b797d576e41c263587e20a.exe	79
PID 4280 wrote to memory of 1484	4280	d8c9255982a5932dbaf224d475d2161d814de36784b797d576e41c263587e20a.exe	79
PID 4280 wrote to memory of 1484	4280	d8c9255982a5932dbaf224d475d2161d814de36784b797d576e41c263587e20a.exe	79
PID 4280 wrote to memory of 1484	4280	d8c9255982a5932dbaf224d475d2161d814de36784b797d576e41c263587e20a.exe	79
PID 4280 wrote to memory of 1484	4280	d8c9255982a5932dbaf224d475d2161d814de36784b797d576e41c263587e20a.exe	79
PID 4280 wrote to memory of 1484	4280	d8c9255982a5932dbaf224d475d2161d814de36784b797d576e41c263587e20a.exe	79
PID 4280 wrote to memory of 1484	4280	d8c9255982a5932dbaf224d475d2161d814de36784b797d576e41c263587e20a.exe	79
PID 4280 wrote to memory of 1484	4280	d8c9255982a5932dbaf224d475d2161d814de36784b797d576e41c263587e20a.exe	79
PID 1484 wrote to memory of 532	1484	d8c9255982a5932dbaf224d475d2161d814de36784b797d576e41c263587e20a.exe	80
PID 1484 wrote to memory of 532	1484	d8c9255982a5932dbaf224d475d2161d814de36784b797d576e41c263587e20a.exe	80
PID 1484 wrote to memory of 532	1484	d8c9255982a5932dbaf224d475d2161d814de36784b797d576e41c263587e20a.exe	80
PID 1484 wrote to memory of 4692	1484	d8c9255982a5932dbaf224d475d2161d814de36784b797d576e41c263587e20a.exe	82
PID 1484 wrote to memory of 4692	1484	d8c9255982a5932dbaf224d475d2161d814de36784b797d576e41c263587e20a.exe	82
PID 1484 wrote to memory of 4692	1484	d8c9255982a5932dbaf224d475d2161d814de36784b797d576e41c263587e20a.exe	82
PID 4692 wrote to memory of 3736	4692	systemlogfiles.exe	83
PID 4692 wrote to memory of 3736	4692	systemlogfiles.exe	83
PID 4692 wrote to memory of 3736	4692	systemlogfiles.exe	83
PID 4692 wrote to memory of 3736	4692	systemlogfiles.exe	83
PID 4692 wrote to memory of 3736	4692	systemlogfiles.exe	83
PID 4692 wrote to memory of 3736	4692	systemlogfiles.exe	83
PID 4692 wrote to memory of 3736	4692	systemlogfiles.exe	83
PID 4692 wrote to memory of 3736	4692	systemlogfiles.exe	83
PID 3736 wrote to memory of 2592	3736	systemlogfiles.exe	84
PID 3736 wrote to memory of 2592	3736	systemlogfiles.exe	84
PID 3736 wrote to memory of 2592	3736	systemlogfiles.exe	84

C:\Users\Admin\AppData\Local\Temp\d8c9255982a5932dbaf224d475d2161d814de36784b797d576e41c263587e20a.exe
"C:\Users\Admin\AppData\Local\Temp\d8c9255982a5932dbaf224d475d2161d814de36784b797d576e41c263587e20a.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4280
- C:\Users\Admin\AppData\Local\Temp\d8c9255982a5932dbaf224d475d2161d814de36784b797d576e41c263587e20a.exe
  "C:\Users\Admin\AppData\Local\Temp\d8c9255982a5932dbaf224d475d2161d814de36784b797d576e41c263587e20a.exe"
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1484
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks" /create /tn "systemlogfiles.exe" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\systemlogfiles\systemlogfiles.exe" /rl HIGHEST /f
    3⤵
    - Creates scheduled task(s)
    PID:532
- - C:\Users\Admin\AppData\Roaming\systemlogfiles\systemlogfiles.exe
    "C:\Users\Admin\AppData\Roaming\systemlogfiles\systemlogfiles.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:4692
  - - C:\Users\Admin\AppData\Roaming\systemlogfiles\systemlogfiles.exe
      "C:\Users\Admin\AppData\Roaming\systemlogfiles\systemlogfiles.exe"
      4⤵
      Executes dropped EXE
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of FindShellTrayWindow
      Suspicious use of SendNotifyMessage
      Suspicious use of WriteProcessMemory
      PID:3736
    - - C:\Windows\SysWOW64\schtasks.exe
        
        "schtasks" /create /tn "systemlogfiles.exe" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\systemlogfiles\systemlogfiles.exe" /rl HIGHEST /f
        5⤵
        Creates scheduled task(s)
        
        PID:2592

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Web Service

T1102

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Web Service

T1102

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

d8c9255982a5932dbaf224d475d2161d814de36784b797d576e41c263587e20a.exe.log

Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\d8c9255982a5932dbaf224d475d2161d814de36784b797d576e41c263587e20a.exe.log
Size 321B
SHA256 10c8c7b5fa58f8c6b69f44e92a4e2af111b59fcf4f21a07e04b19e14876ccdf8
MD5 baf5d1398fdb79e947b60fe51e45397f
SHA1 49e7b8389f47b93509d621b8030b75e96bb577af
SHA512 b2c9ef5581d5eae7c17ae260fe9f52344ed737fa851cb44d1cea58a32359d0ac5d0ca3099c970209bd30a0d4af6e504101f21b7054cf5eca91c0831cf12fb413
MD5 SHA1 SHA512

Submit Download

systemlogfiles.exe.log

Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\systemlogfiles.exe.log
Size 321B
SHA256 10c8c7b5fa58f8c6b69f44e92a4e2af111b59fcf4f21a07e04b19e14876ccdf8
MD5 baf5d1398fdb79e947b60fe51e45397f
SHA1 49e7b8389f47b93509d621b8030b75e96bb577af
SHA512 b2c9ef5581d5eae7c17ae260fe9f52344ed737fa851cb44d1cea58a32359d0ac5d0ca3099c970209bd30a0d4af6e504101f21b7054cf5eca91c0831cf12fb413
MD5 SHA1 SHA512

Submit Download

systemlogfiles.exe

Path C:\Users\Admin\AppData\Roaming\systemlogfiles\systemlogfiles.exe
Size 4.4MB
SHA256 d8c9255982a5932dbaf224d475d2161d814de36784b797d576e41c263587e20a
MD5 81d087f91c68842c740681f29d0ce55a
SHA1 86d06df7951abf1ec1919ed2ec0fa844588a9ef0
SHA512 aae59963a9b63e5320429abe84319f3277195ad403c3db1a11daf89e84c1acc7d72da9f06c7ae74e4ffd850ee636a6b6c7fd7427158b3e600c83010c015e4955
SSDEEP 98304:8d/SzqloJFCuzwRr8sGf5m/HKjrl2JpINpvfTS:muqlgCuzwOsGfA/Kjx2JpINh
MD5 SHA1 SHA512 SSDEEP

Submit Download

systemlogfiles.exe

Path C:\Users\Admin\AppData\Roaming\systemlogfiles\systemlogfiles.exe
Size 4.4MB
SHA256 d8c9255982a5932dbaf224d475d2161d814de36784b797d576e41c263587e20a
MD5 81d087f91c68842c740681f29d0ce55a
SHA1 86d06df7951abf1ec1919ed2ec0fa844588a9ef0
SHA512 aae59963a9b63e5320429abe84319f3277195ad403c3db1a11daf89e84c1acc7d72da9f06c7ae74e4ffd850ee636a6b6c7fd7427158b3e600c83010c015e4955
SSDEEP 98304:8d/SzqloJFCuzwRr8sGf5m/HKjrl2JpINpvfTS:muqlgCuzwOsGfA/Kjx2JpINh
MD5 SHA1 SHA512 SSDEEP

Submit Download

systemlogfiles.exe

Path C:\Users\Admin\AppData\Roaming\systemlogfiles\systemlogfiles.exe
Size 4.4MB
SHA256 d8c9255982a5932dbaf224d475d2161d814de36784b797d576e41c263587e20a
MD5 81d087f91c68842c740681f29d0ce55a
SHA1 86d06df7951abf1ec1919ed2ec0fa844588a9ef0
SHA512 aae59963a9b63e5320429abe84319f3277195ad403c3db1a11daf89e84c1acc7d72da9f06c7ae74e4ffd850ee636a6b6c7fd7427158b3e600c83010c015e4955
SSDEEP 98304:8d/SzqloJFCuzwRr8sGf5m/HKjrl2JpINpvfTS:muqlgCuzwOsGfA/Kjx2JpINh
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/1484-136-0x0000000000400000-0x0000000000724000-memory.dmp

Download

memory/1484-139-0x0000000005DC0000-0x0000000005E52000-memory.dmp

Download

memory/1484-140-0x0000000005D30000-0x0000000005D3A000-memory.dmp

Download

memory/1484-141-0x0000000005D10000-0x0000000005D20000-memory.dmp

Download

memory/3736-152-0x0000000007160000-0x0000000007778000-memory.dmp

Download

memory/3736-151-0x00000000057C0000-0x00000000057D0000-memory.dmp

Download

memory/3736-153-0x0000000006CF0000-0x0000000006D40000-memory.dmp

Download

memory/3736-154-0x0000000007780000-0x0000000007832000-memory.dmp

Download

memory/3736-155-0x00000000057C0000-0x00000000057D0000-memory.dmp

Download

memory/4280-135-0x0000000005B00000-0x00000000060A4000-memory.dmp

Download

memory/4280-133-0x00000000006F0000-0x0000000000B66000-memory.dmp

Download

memory/4280-134-0x0000000005380000-0x0000000005390000-memory.dmp

Download

memory/4692-146-0x0000000005D20000-0x0000000005D30000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads