quasar | 282d6f5ddc83351dab51e6decc1293b078638f0cfd0baca4673afc8246fd32bd

Analysis

max time kernel
69s
max time network
65s
platform
windows10-ltsc 2021_x64
resource
win10ltsc2021-20241023-en
resource tags

arch:x64arch:x86image:win10ltsc2021-20241023-enlocale:en-usos:windows10-ltsc 2021-x64system
submitted
06/11/2024, 07:01

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General

Target

kreo q zi.7z
Size

922KB
MD5

ec516db688f94e98d5141f4bade557e9
SHA1

198ffbae5eed415ac673f5e371774759f1a53de1
SHA256

282d6f5ddc83351dab51e6decc1293b078638f0cfd0baca4673afc8246fd32bd
SHA512

ecc34ad7d15fbedbbc4e62b469f5e6e5e71099e19831574da61dc9f751ed5b2faad1676b8b3dbf0911c4dac628c7a15e9d07d953692c5ab1b700ea07f6396985
SSDEEP

24576:yScP7qLl4iGQATiKL0aywxTodSrUF+nVZLLymvgDoSAWcNtMXqWOU:07qLl4KATiJUo0UEnLmmvqiWcNtMXDOU

Score

10^/10

quasar office04 discovery spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

hola435-24858.portmap.host:24858

Mutex

e51e2b65-e963-4051-9736-67d57ed46798

Attributes

encryption_key
AEA258EF65BF1786F0F767C0BE2497ECC304C46F
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
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
behavioral1/files/0x002800000004514d-2.dat	family_quasar
behavioral1/memory/2416-5-0x0000000000F90000-0x00000000012B4000-memory.dmp	family_quasar

Checks computer location settings 2 TTPs 6 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1361837696-2276465416-1936241636-1000\Control Panel\International\Geo\Nation	Client.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1361837696-2276465416-1936241636-1000\Control Panel\International\Geo\Nation	Client.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1361837696-2276465416-1936241636-1000\Control Panel\International\Geo\Nation	Client.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1361837696-2276465416-1936241636-1000\Control Panel\International\Geo\Nation	Client.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1361837696-2276465416-1936241636-1000\Control Panel\International\Geo\Nation	Client.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1361837696-2276465416-1936241636-1000\Control Panel\International\Geo\Nation	Client.exe

Executes dropped EXE 7 IoCs

pid	Process
2416	kreo q zi.exe
768	Client.exe
2816	Client.exe
2872	Client.exe
4568	Client.exe
984	Client.exe
660	Client.exe

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

System Information Discovery
T1082

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 6 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
1660	PING.EXE
1032	PING.EXE
4008	PING.EXE
4548	PING.EXE
644	PING.EXE
4520	PING.EXE

Runs ping.exe 1 TTPs 6 IoCs

Remote System Discovery

T1018

pid	Process
4548	PING.EXE
644	PING.EXE
4520	PING.EXE
1660	PING.EXE
1032	PING.EXE
4008	PING.EXE

Scheduled Task/Job: Scheduled Task 1 TTPs 7 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
4828	schtasks.exe
2972	schtasks.exe
4996	schtasks.exe
1272	schtasks.exe
4528	schtasks.exe
1284	schtasks.exe
1924	schtasks.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2396	7zFM.exe

Suspicious use of AdjustPrivilegeToken 10 IoCs

description	pid	Process
Token: SeRestorePrivilege	2396	7zFM.exe
Token: 35	2396	7zFM.exe
Token: SeSecurityPrivilege	2396	7zFM.exe
Token: SeDebugPrivilege	2416	kreo q zi.exe
Token: SeDebugPrivilege	768	Client.exe
Token: SeDebugPrivilege	2816	Client.exe
Token: SeDebugPrivilege	2872	Client.exe
Token: SeDebugPrivilege	4568	Client.exe
Token: SeDebugPrivilege	984	Client.exe
Token: SeDebugPrivilege	660	Client.exe

Suspicious use of FindShellTrayWindow 2 IoCs

pid	Process
2396	7zFM.exe
2396	7zFM.exe

Suspicious use of WriteProcessMemory 62 IoCs

description	pid	Process	procid_target
PID 2416 wrote to memory of 4996	2416	kreo q zi.exe	93
PID 2416 wrote to memory of 4996	2416	kreo q zi.exe	93
PID 2416 wrote to memory of 768	2416	kreo q zi.exe	96
PID 2416 wrote to memory of 768	2416	kreo q zi.exe	96
PID 768 wrote to memory of 1272	768	Client.exe	97
PID 768 wrote to memory of 1272	768	Client.exe	97
PID 768 wrote to memory of 748	768	Client.exe	99
PID 768 wrote to memory of 748	768	Client.exe	99
PID 748 wrote to memory of 2972	748	cmd.exe	101
PID 748 wrote to memory of 2972	748	cmd.exe	101
PID 748 wrote to memory of 4548	748	cmd.exe	102
PID 748 wrote to memory of 4548	748	cmd.exe	102
PID 748 wrote to memory of 2816	748	cmd.exe	104
PID 748 wrote to memory of 2816	748	cmd.exe	104
PID 2816 wrote to memory of 4528	2816	Client.exe	105
PID 2816 wrote to memory of 4528	2816	Client.exe	105
PID 2816 wrote to memory of 4068	2816	Client.exe	107
PID 2816 wrote to memory of 4068	2816	Client.exe	107
PID 4068 wrote to memory of 3380	4068	cmd.exe	109
PID 4068 wrote to memory of 3380	4068	cmd.exe	109
PID 4068 wrote to memory of 644	4068	cmd.exe	110
PID 4068 wrote to memory of 644	4068	cmd.exe	110
PID 4068 wrote to memory of 2872	4068	cmd.exe	112
PID 4068 wrote to memory of 2872	4068	cmd.exe	112
PID 2872 wrote to memory of 1284	2872	Client.exe	113
PID 2872 wrote to memory of 1284	2872	Client.exe	113
PID 2872 wrote to memory of 1304	2872	Client.exe	115
PID 2872 wrote to memory of 1304	2872	Client.exe	115
PID 1304 wrote to memory of 2580	1304	cmd.exe	117
PID 1304 wrote to memory of 2580	1304	cmd.exe	117
PID 1304 wrote to memory of 4520	1304	cmd.exe	118
PID 1304 wrote to memory of 4520	1304	cmd.exe	118
PID 1304 wrote to memory of 4568	1304	cmd.exe	119
PID 1304 wrote to memory of 4568	1304	cmd.exe	119
PID 4568 wrote to memory of 1924	4568	Client.exe	120
PID 4568 wrote to memory of 1924	4568	Client.exe	120
PID 4568 wrote to memory of 3556	4568	Client.exe	122
PID 4568 wrote to memory of 3556	4568	Client.exe	122
PID 3556 wrote to memory of 3372	3556	cmd.exe	124
PID 3556 wrote to memory of 3372	3556	cmd.exe	124
PID 3556 wrote to memory of 1660	3556	cmd.exe	125
PID 3556 wrote to memory of 1660	3556	cmd.exe	125
PID 3556 wrote to memory of 984	3556	cmd.exe	126
PID 3556 wrote to memory of 984	3556	cmd.exe	126
PID 984 wrote to memory of 4828	984	Client.exe	127
PID 984 wrote to memory of 4828	984	Client.exe	127
PID 984 wrote to memory of 4448	984	Client.exe	129
PID 984 wrote to memory of 4448	984	Client.exe	129
PID 4448 wrote to memory of 1436	4448	cmd.exe	131
PID 4448 wrote to memory of 1436	4448	cmd.exe	131
PID 4448 wrote to memory of 1032	4448	cmd.exe	132
PID 4448 wrote to memory of 1032	4448	cmd.exe	132
PID 4448 wrote to memory of 660	4448	cmd.exe	133
PID 4448 wrote to memory of 660	4448	cmd.exe	133
PID 660 wrote to memory of 2972	660	Client.exe	134
PID 660 wrote to memory of 2972	660	Client.exe	134
PID 660 wrote to memory of 2200	660	Client.exe	136
PID 660 wrote to memory of 2200	660	Client.exe	136
PID 2200 wrote to memory of 900	2200	cmd.exe	138
PID 2200 wrote to memory of 900	2200	cmd.exe	138
PID 2200 wrote to memory of 4008	2200	cmd.exe	139
PID 2200 wrote to memory of 4008	2200	cmd.exe	139

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:\Program Files\7-Zip\7zFM.exe
"C:\Program Files\7-Zip\7zFM.exe" "C:\Users\Admin\AppData\Local\Temp\kreo q zi.7z"
1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
PID:2396

C:\Users\Admin\Desktop\kreo q zi.exe
"C:\Users\Admin\Desktop\kreo q zi.exe"
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2416
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:4996
- C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
  "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:768
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:1272
- - C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\eEnjNUjgGWOd.bat" "
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:748
  - - C:\Windows\system32\chcp.com
      chcp 65001
      4⤵
      PID:2972
  - - C:\Windows\system32\PING.EXE
      ping -n 10 localhost
      4⤵
      System Network Configuration Discovery: Internet Connection Discovery
      Runs ping.exe
      PID:4548
  - - C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
      "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
      4⤵
      Checks computer location settings
      Executes dropped EXE
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:2816
    - - C:\Windows\SYSTEM32\schtasks.exe
        
        "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
        5⤵
        Scheduled Task/Job: Scheduled Task
        
        PID:4528
    - - C:\Windows\system32\cmd.exe
        
        C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\4v4corS3ZZ0V.bat" "
        5⤵
        Suspicious use of WriteProcessMemory
        
        PID:4068
      - C:\Windows\system32\chcp.com
        
        chcp 65001
        6⤵
        
        PID:3380
      - C:\Windows\system32\PING.EXE
        
        ping -n 10 localhost
        6⤵
        System Network Configuration Discovery: Internet Connection Discovery
        Runs ping.exe
        
        PID:644
      - C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
        
        "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
        6⤵
        Checks computer location settings
        Executes dropped EXE
        Suspicious use of AdjustPrivilegeToken
        Suspicious use of WriteProcessMemory
        
        PID:2872
        
        C:\Windows\SYSTEM32\schtasks.exe
        
        "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
        7⤵
        Scheduled Task/Job: Scheduled Task
        
        PID:1284
        
        C:\Windows\system32\cmd.exe
        
        C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\7tPANshK7DHi.bat" "
        7⤵
        Suspicious use of WriteProcessMemory
        
        PID:1304
        
        C:\Windows\system32\chcp.com
        
        chcp 65001
        8⤵
        
        PID:2580
        
        C:\Windows\system32\PING.EXE
        
        ping -n 10 localhost
        8⤵
        System Network Configuration Discovery: Internet Connection Discovery
        Runs ping.exe
        
        PID:4520
        
        C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
        
        "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
        8⤵
        Checks computer location settings
        Executes dropped EXE
        Suspicious use of AdjustPrivilegeToken
        Suspicious use of WriteProcessMemory
        
        PID:4568
        
        C:\Windows\SYSTEM32\schtasks.exe
        
        "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
        9⤵
        Scheduled Task/Job: Scheduled Task
        
        PID:1924
        
        C:\Windows\system32\cmd.exe
        
        C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\w5PGS5nk1Ugc.bat" "
        9⤵
        Suspicious use of WriteProcessMemory
        
        PID:3556
        
        C:\Windows\system32\chcp.com
        
        chcp 65001
        10⤵
        
        PID:3372
        
        C:\Windows\system32\PING.EXE
        
        ping -n 10 localhost
        10⤵
        System Network Configuration Discovery: Internet Connection Discovery
        Runs ping.exe
        
        PID:1660
        
        C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
        
        "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
        10⤵
        Checks computer location settings
        Executes dropped EXE
        Suspicious use of AdjustPrivilegeToken
        Suspicious use of WriteProcessMemory
        
        PID:984
        
        C:\Windows\SYSTEM32\schtasks.exe
        
        "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
        11⤵
        Scheduled Task/Job: Scheduled Task
        
        PID:4828
        
        C:\Windows\system32\cmd.exe
        
        C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\hk6Ko4y8l1Bg.bat" "
        11⤵
        Suspicious use of WriteProcessMemory
        
        PID:4448
        
        C:\Windows\system32\chcp.com
        
        chcp 65001
        12⤵
        
        PID:1436
        
        C:\Windows\system32\PING.EXE
        
        ping -n 10 localhost
        12⤵
        System Network Configuration Discovery: Internet Connection Discovery
        Runs ping.exe
        
        PID:1032
        
        C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
        
        "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
        12⤵
        Checks computer location settings
        Executes dropped EXE
        Suspicious use of AdjustPrivilegeToken
        Suspicious use of WriteProcessMemory
        
        PID:660
        
        C:\Windows\SYSTEM32\schtasks.exe
        
        "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
        13⤵
        Scheduled Task/Job: Scheduled Task
        
        PID:2972
        
        C:\Windows\system32\cmd.exe
        
        C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\lxK56ht0FpbH.bat" "
        13⤵
        Suspicious use of WriteProcessMemory
        
        PID:2200
        
        C:\Windows\system32\chcp.com
        
        chcp 65001
        14⤵
        
        PID:900
        
        C:\Windows\system32\PING.EXE
        
        ping -n 10 localhost
        14⤵
        System Network Configuration Discovery: Internet Connection Discovery
        Runs ping.exe
        
        PID:4008

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

Remote System Discovery

T1018

System Information Discovery

T1082

System Network Configuration Discovery

T1016

Internet Connection Discovery

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\Client.exe.log

Filesize
2KB

MD5
7787ce173dfface746f5a9cf5477883d

SHA1
4587d870e914785b3a8fb017fec0c0f1c7ec0004

SHA256
c339149818fa8f9e5af4627715c3afe4f42bc1267df17d77a278d4c811ed8df1

SHA512
3a630053ae99114292f8cf8d45600f8fe72125795252bf76677663476bd2275be084a1af2fcb4ce30409ba1b5829b2b3ffb6795de46d2a703c3314017a86f1ff

Download Submit
C:\Users\Admin\AppData\Local\Temp\4v4corS3ZZ0V.bat

Filesize
207B

MD5
f75eed355febcc6978b9ad5f8f124532

SHA1
66ba9f3017b7defbac19e17cfdcd8783c9987e57

SHA256
7384b070ab6bbfa309b86eb15c21da60eaf25ac896dca54d883e7bd28061bc1f

SHA512
e38893e9d75a6b4d3b9cde7b5779432d66a3e60e275b92529986a3401722f0da06e7443804550e86f9559bda5b283df453176cf53fced0cefcb919875e7e4530

Download Submit
C:\Users\Admin\AppData\Local\Temp\7tPANshK7DHi.bat

Filesize
207B

MD5
64eb49823736a5deefd4d00872895d03

SHA1
6493039c061d0b5a0d0a132d6981798c33753a87

SHA256
7cc7b837da3d8ebf2079d01e802cccc64623b9794e40f0750c6c44ab52c8dfe5

SHA512
af1dac06dd7b2c740bb68251723052bd1f3e8613e32fb55c3f3c0697cd0d4a15f1544c768dc3c93dac0e1cf3183a92a0d01b609e0d8478b6b8ad727523fa1f47

Download Submit
C:\Users\Admin\AppData\Local\Temp\eEnjNUjgGWOd.bat

Filesize
207B

MD5
66b0654eb66d236396754fb82ea8b850

SHA1
6015965f6b2ab0bace187645d3085d0d88a5bea5

SHA256
a1a1afbdb8f2ae040b5a9f6af57dab1de3d2ce9ffaf46ad921bb2ea2beabd485

SHA512
60e65f73bf48f94e39b32c5070567a9b495d46f70cf06feb1cd68ee59aad4dd2e8b895263aa97f237ca85713c3efce010fbdba37ee913f198b15c87e8208eff1

Download Submit
C:\Users\Admin\AppData\Local\Temp\hk6Ko4y8l1Bg.bat

Filesize
207B

MD5
c7934ed10c79075422897faaad26d004

SHA1
27d989ed971c6a0309697cf717fe9f3ca3d9f3b0

SHA256
9699f9e2c20d0efcb36e7f9e09504a677989ec457d9a70582f782dac9b36b1af

SHA512
1e34aace52fa024c56d08f87000eaaaf22b67237ef9af7380c402257f56d144fd1dd5dad4710042cda5d321a1295520d3ef8c679a30ae740cc8fd049b5e6af90

Download Submit
C:\Users\Admin\AppData\Local\Temp\lxK56ht0FpbH.bat

Filesize
207B

MD5
8142b16e4f8d97c6fbcd3a2299f9f838

SHA1
07dee0d73f4573a51b004a96ebd702a3a5f2b7e1

SHA256
ed295650ed0d0f9e1263484de84ea8741011f558632c9452084fea5ba309ddf2

SHA512
1762c0bc746910f9b4137edf6004808e33713e277adf5be228cfb70a3e5528ef7654c68ed6ad64f600c1c85c1b8943f61c31c733dc445081152da821f9230e3d

Download Submit
C:\Users\Admin\AppData\Local\Temp\w5PGS5nk1Ugc.bat

Filesize
207B

MD5
3f5f4caf4d3fe45704c6d3eb7314d7e3

SHA1
1801013de6050d1e6dcbedddfb1c7adb5f32e947

SHA256
35100b4ba4e4b40f886eb2168e1100c9deadcfe68936b9ceee636e9e4a767fc6

SHA512
047d07e2e8dbc78fb561421a01fc6af9e11c3f08599a68fe86392a93f29f61a61543ec4f17562eb2f64d1c2833e69123909af4ffc52fbd8bfe164b008b98c55e

Download Submit
C:\Users\Admin\Desktop\kreo q zi.exe

Filesize
3.1MB

MD5
28ac02fc40c8f1c2a8989ee3c09a1372

SHA1
b182758b62a1482142c0fce4be78c786e08b7025

SHA256
0fe81f9a51cf0068408de3c3605ce2033a00bd7ec90cc9516c38f6069e06433b

SHA512
2cbf2f6af46e5fae8e67144e1ac70bc748036c7adb7f7810d7d7d9f255ccf5d163cce07f11fb6526f9ab61c39f28bdf2356cc315b19a61cd2115612882eab767

Download Submit
memory/768-11-0x000000001CCD0000-0x000000001CD82000-memory.dmp

Filesize
712KB

Download
memory/768-10-0x0000000002F20000-0x0000000002F70000-memory.dmp

Filesize
320KB

Download
memory/2416-9-0x00007FFF47800000-0x00007FFF482C2000-memory.dmp

Filesize
10.8MB

Download
memory/2416-6-0x00007FFF47800000-0x00007FFF482C2000-memory.dmp

Filesize
10.8MB

Download
memory/2416-5-0x0000000000F90000-0x00000000012B4000-memory.dmp

Filesize
3.1MB

Download
memory/2416-4-0x00007FFF47803000-0x00007FFF47805000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads