quasar | ca182b6ce56a01a69122b24469fe5ad78e0cda78caeb49e5a814e2ac5774a10a

Analysis

max time kernel
9s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
30-06-2024 13:18

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General

Target

Client-built.exe
Size

3.1MB
MD5

1e48869d1ce254c1aba0e61aedcdba8e
SHA1

cf79b1e78d9e1616208e653c4df4eef3b9f7360b
SHA256

ca182b6ce56a01a69122b24469fe5ad78e0cda78caeb49e5a814e2ac5774a10a
SHA512

fc6469a2297258cd9723f2d6c795e78c5b065ed709384bb18fe0fb8255cb2760e0633ec2683652ef88abd87ac21ef1d31eee3fd35e64f464d4da0c205fdcb343
SSDEEP

49152:7vilL26AaNeWgPhlmVqvMQ7XSKeQ03far7ToGddTHHB72eh2NT:7vaL26AaNeWgPhlmVqkQ7XSKu3Y

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

192.168.1.150:4782

Mutex

4fa54cdc-4bee-4759-b0fd-21bb6d6f9eed

Attributes

encryption_key
99A3D9CE1DE6501187FC4C0E50EBB3FE8AD7B9A8
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Microsoft Task Manager Worker Service
subdirectory
SubDir

Signatures

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

Quasar payload 3 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2384-1-0x0000000000640000-0x0000000000964000-memory.dmp	family_quasar
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe	family_quasar
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe	family_quasar

Executes dropped EXE 1 IoCs

Processes:

Client.exe

pid process

1956 Client.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
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

3580 schtasks.exe
1116 schtasks.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

Client-built.exeClient.exe

description pid process

Token: SeDebugPrivilege 2384 Client-built.exe
Token: SeDebugPrivilege 1956 Client.exe

pid	process
1956	Client.exe

pid	process
3580	schtasks.exe
1116	schtasks.exe

description	pid	process
Token: SeDebugPrivilege	2384	Client-built.exe
Token: SeDebugPrivilege	1956	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

Client-built.exeClient.exe

description	pid	process	target process
PID 2384 wrote to memory of 3580	2384	Client-built.exe	schtasks.exe
PID 2384 wrote to memory of 3580	2384	Client-built.exe	schtasks.exe
PID 2384 wrote to memory of 1956	2384	Client-built.exe	Client.exe
PID 2384 wrote to memory of 1956	2384	Client-built.exe	Client.exe
PID 1956 wrote to memory of 1116	1956	Client.exe	schtasks.exe
PID 1956 wrote to memory of 1116	1956	Client.exe	schtasks.exe

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\Client-built.exe
"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2384

C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "Microsoft Task Manager Worker Service" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
2⤵
- Scheduled Task/Job: Scheduled Task
PID:3580

C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
"C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1956

C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "Microsoft Task Manager Worker Service" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
3⤵
- Scheduled Task/Job: Scheduled Task
PID:1116

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=2824 --field-trial-handle=2236,i,5367110156796017614,12594004256180761011,262144 --variations-seed-version /prefetch:8
1⤵
PID:4496

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads

C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
Filesize
3.1MB

MD5
1e48869d1ce254c1aba0e61aedcdba8e

SHA1
cf79b1e78d9e1616208e653c4df4eef3b9f7360b

SHA256
ca182b6ce56a01a69122b24469fe5ad78e0cda78caeb49e5a814e2ac5774a10a

SHA512
fc6469a2297258cd9723f2d6c795e78c5b065ed709384bb18fe0fb8255cb2760e0633ec2683652ef88abd87ac21ef1d31eee3fd35e64f464d4da0c205fdcb343

Download Submit
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
Filesize
2.8MB

MD5
d0c84cff3a18e6344412ae61e8b847f4

SHA1
952e7a6ff8822fd17a64bec728ca44bb93a6873b

SHA256
830eaac278755ec1cf721387ebc397a70f1a56c2faf96b2bb502a898d89bcfc5

SHA512
eeb44b0fa278455875d2cee046890f66fe67277c34b5dcf5115970c39040dc4515d743621b5c64bebb1b5bdb9b6c033c949fb005eb0844f3218d520b71ea0c96

Download Submit
memory/1956-9-0x00007FFBEE9A0000-0x00007FFBEF461000-memory.dmp

Filesize
10.8MB

Download
memory/1956-10-0x00007FFBEE9A0000-0x00007FFBEF461000-memory.dmp

Filesize
10.8MB

Download
memory/1956-12-0x000000001C810000-0x000000001C860000-memory.dmp

Filesize
320KB

Download
memory/1956-13-0x000000001C920000-0x000000001C9D2000-memory.dmp

Filesize
712KB

Download
memory/1956-14-0x00007FFBEE9A0000-0x00007FFBEF461000-memory.dmp

Filesize
10.8MB

Download
memory/1956-15-0x00007FFBEE9A0000-0x00007FFBEF461000-memory.dmp

Filesize
10.8MB

Download
memory/2384-0-0x00007FFBEE9A3000-0x00007FFBEE9A5000-memory.dmp

Filesize
8KB

Download
memory/2384-1-0x0000000000640000-0x0000000000964000-memory.dmp

Filesize
3.1MB

Download
memory/2384-2-0x00007FFBEE9A0000-0x00007FFBEF461000-memory.dmp

Filesize
10.8MB

Download
memory/2384-11-0x00007FFBEE9A0000-0x00007FFBEF461000-memory.dmp

Filesize
10.8MB

Download