quasar | b18d108dc2e0faf28287573f4a97e2ab2bc14d6ba6bf962b7a63e3e5c505278b

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
07/06/2024, 20:11

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

Client-built.exe
Size

3.1MB
MD5

5b85026d927d39d8c79f7d5a97c9f7bc
SHA1

7219e4de917827f6ae1f813eee9eb590ad9ee658
SHA256

b18d108dc2e0faf28287573f4a97e2ab2bc14d6ba6bf962b7a63e3e5c505278b
SHA512

b8ea125bc823794a4dec8b0651e2d1e376ec75c81333cf80d641a61f259559cba2b4988cb234b3d8121119854b116ea43b397abbae4daeadb102aa1cde4892c7
SSDEEP

49152:GvbI22SsaNYfdPBldt698dBcjH2gxNESEDk/iYLoGdlodTHHB72eh2NT:Gvk22SsaNYfdPBldt6+dBcjH1xi21o

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

147.185.221.19:1998

Mutex

7e12675d-1220-4eb4-be9d-8c8589d2e180

Attributes

encryption_key
1273BC96F067EC4AA34581E6528B50F1DE868338
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 payload 1 IoCs

resource	yara_rule
behavioral1/memory/3732-1-0x0000000000040000-0x0000000000364000-memory.dmp	family_quasar

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

System Information Discovery
T1082

Enumerates system info in registry 2 TTPs 3 IoCs

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS	msedge.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemManufacturer	msedge.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemProductName	msedge.exe

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
2952	msedge.exe
2952	msedge.exe
1404	msedge.exe
1404	msedge.exe
1408	identity_helper.exe
1408	identity_helper.exe
1112	msedge.exe
1112	msedge.exe
1112	msedge.exe
1112	msedge.exe

Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary 7 IoCs

pid	Process
1404	msedge.exe
1404	msedge.exe
1404	msedge.exe
1404	msedge.exe
1404	msedge.exe
1404	msedge.exe
1404	msedge.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3732	Client-built.exe

Suspicious use of FindShellTrayWindow 26 IoCs

pid	Process
3732	Client-built.exe
1404	msedge.exe
1404	msedge.exe
1404	msedge.exe
1404	msedge.exe
1404	msedge.exe
1404	msedge.exe
1404	msedge.exe
1404	msedge.exe
1404	msedge.exe
1404	msedge.exe
1404	msedge.exe
1404	msedge.exe
1404	msedge.exe
1404	msedge.exe
1404	msedge.exe
1404	msedge.exe
1404	msedge.exe
1404	msedge.exe
1404	msedge.exe
1404	msedge.exe
1404	msedge.exe
1404	msedge.exe
1404	msedge.exe
1404	msedge.exe
1404	msedge.exe

Suspicious use of SendNotifyMessage 25 IoCs

pid	Process
3732	Client-built.exe
1404	msedge.exe
1404	msedge.exe
1404	msedge.exe
1404	msedge.exe
1404	msedge.exe
1404	msedge.exe
1404	msedge.exe
1404	msedge.exe
1404	msedge.exe
1404	msedge.exe
1404	msedge.exe
1404	msedge.exe
1404	msedge.exe
1404	msedge.exe
1404	msedge.exe
1404	msedge.exe
1404	msedge.exe
1404	msedge.exe
1404	msedge.exe
1404	msedge.exe
1404	msedge.exe
1404	msedge.exe
1404	msedge.exe
1404	msedge.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 1404 wrote to memory of 4688	1404	msedge.exe	95
PID 1404 wrote to memory of 4688	1404	msedge.exe	95
PID 1404 wrote to memory of 3008	1404	msedge.exe	96
PID 1404 wrote to memory of 3008	1404	msedge.exe	96
PID 1404 wrote to memory of 3008	1404	msedge.exe	96
PID 1404 wrote to memory of 3008	1404	msedge.exe	96
PID 1404 wrote to memory of 3008	1404	msedge.exe	96
PID 1404 wrote to memory of 3008	1404	msedge.exe	96
PID 1404 wrote to memory of 3008	1404	msedge.exe	96
PID 1404 wrote to memory of 3008	1404	msedge.exe	96
PID 1404 wrote to memory of 3008	1404	msedge.exe	96
PID 1404 wrote to memory of 3008	1404	msedge.exe	96
PID 1404 wrote to memory of 3008	1404	msedge.exe	96
PID 1404 wrote to memory of 3008	1404	msedge.exe	96
PID 1404 wrote to memory of 3008	1404	msedge.exe	96
PID 1404 wrote to memory of 3008	1404	msedge.exe	96
PID 1404 wrote to memory of 3008	1404	msedge.exe	96
PID 1404 wrote to memory of 3008	1404	msedge.exe	96
PID 1404 wrote to memory of 3008	1404	msedge.exe	96
PID 1404 wrote to memory of 3008	1404	msedge.exe	96
PID 1404 wrote to memory of 3008	1404	msedge.exe	96
PID 1404 wrote to memory of 3008	1404	msedge.exe	96
PID 1404 wrote to memory of 3008	1404	msedge.exe	96
PID 1404 wrote to memory of 3008	1404	msedge.exe	96
PID 1404 wrote to memory of 3008	1404	msedge.exe	96
PID 1404 wrote to memory of 3008	1404	msedge.exe	96
PID 1404 wrote to memory of 3008	1404	msedge.exe	96
PID 1404 wrote to memory of 3008	1404	msedge.exe	96
PID 1404 wrote to memory of 3008	1404	msedge.exe	96
PID 1404 wrote to memory of 3008	1404	msedge.exe	96
PID 1404 wrote to memory of 3008	1404	msedge.exe	96
PID 1404 wrote to memory of 3008	1404	msedge.exe	96
PID 1404 wrote to memory of 3008	1404	msedge.exe	96
PID 1404 wrote to memory of 3008	1404	msedge.exe	96
PID 1404 wrote to memory of 3008	1404	msedge.exe	96
PID 1404 wrote to memory of 3008	1404	msedge.exe	96
PID 1404 wrote to memory of 3008	1404	msedge.exe	96
PID 1404 wrote to memory of 3008	1404	msedge.exe	96
PID 1404 wrote to memory of 3008	1404	msedge.exe	96
PID 1404 wrote to memory of 3008	1404	msedge.exe	96
PID 1404 wrote to memory of 3008	1404	msedge.exe	96
PID 1404 wrote to memory of 3008	1404	msedge.exe	96
PID 1404 wrote to memory of 2952	1404	msedge.exe	97
PID 1404 wrote to memory of 2952	1404	msedge.exe	97
PID 1404 wrote to memory of 3672	1404	msedge.exe	98
PID 1404 wrote to memory of 3672	1404	msedge.exe	98
PID 1404 wrote to memory of 3672	1404	msedge.exe	98
PID 1404 wrote to memory of 3672	1404	msedge.exe	98
PID 1404 wrote to memory of 3672	1404	msedge.exe	98
PID 1404 wrote to memory of 3672	1404	msedge.exe	98
PID 1404 wrote to memory of 3672	1404	msedge.exe	98
PID 1404 wrote to memory of 3672	1404	msedge.exe	98
PID 1404 wrote to memory of 3672	1404	msedge.exe	98
PID 1404 wrote to memory of 3672	1404	msedge.exe	98
PID 1404 wrote to memory of 3672	1404	msedge.exe	98
PID 1404 wrote to memory of 3672	1404	msedge.exe	98
PID 1404 wrote to memory of 3672	1404	msedge.exe	98
PID 1404 wrote to memory of 3672	1404	msedge.exe	98
PID 1404 wrote to memory of 3672	1404	msedge.exe	98
PID 1404 wrote to memory of 3672	1404	msedge.exe	98
PID 1404 wrote to memory of 3672	1404	msedge.exe	98
PID 1404 wrote to memory of 3672	1404	msedge.exe	98
PID 1404 wrote to memory of 3672	1404	msedge.exe	98
PID 1404 wrote to memory of 3672	1404	msedge.exe	98

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 FindShellTrayWindow
- Suspicious use of SendNotifyMessage
PID:3732

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --profile-directory=Default
1⤵
- Enumerates system info in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:1404
- C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=crashpad-handler "--user-data-dir=C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data" /prefetch:7 --monitor-self-annotation=ptype=crashpad-handler "--database=C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Crashpad" "--metrics-dir=C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data" --annotation=IsOfficialBuild=1 --annotation=channel= --annotation=chromium-version=92.0.4515.131 "--annotation=exe=C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --annotation=plat=Win64 "--annotation=prod=Microsoft Edge" --annotation=ver=92.0.902.67 --initial-client-data=0xfc,0x100,0x104,0xd8,0x108,0x7ff8d1af46f8,0x7ff8d1af4708,0x7ff8d1af4718
  2⤵
  PID:4688
- C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=gpu-process --field-trial-handle=2172,7666088708097706576,14238856347648206429,131072 --gpu-preferences=UAAAAAAAAADgAAAQAAAAAAAAAAAAAAAAAABgAAAAAAAwAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAHgAAAAAAAAAeAAAAAAAAAAoAAAABAAAACAAAAAAAAAAKAAAAAAAAAAwAAAAAAAAADgAAAAAAAAAEAAAAAAAAAAAAAAADQAAABAAAAAAAAAAAQAAAA0AAAAQAAAAAAAAAAQAAAANAAAAEAAAAAAAAAAHAAAADQAAAAgAAAAAAAAACAAAAAAAAAA= --mojo-platform-channel-handle=2188 /prefetch:2
  2⤵
  PID:3008
- C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=network.mojom.NetworkService --field-trial-handle=2172,7666088708097706576,14238856347648206429,131072 --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=2240 /prefetch:3
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  PID:2952
- C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=storage.mojom.StorageService --field-trial-handle=2172,7666088708097706576,14238856347648206429,131072 --lang=en-US --service-sandbox-type=utility --mojo-platform-channel-handle=2880 /prefetch:8
  2⤵
  PID:3672
- C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2172,7666088708097706576,14238856347648206429,131072 --lang=en-US --disable-client-side-phishing-detection --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=6 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=3336 /prefetch:1
  2⤵
  PID:4396
- C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2172,7666088708097706576,14238856347648206429,131072 --lang=en-US --disable-client-side-phishing-detection --instant-process --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=5 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=3332 /prefetch:1
  2⤵
  PID:4200
- C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2172,7666088708097706576,14238856347648206429,131072 --lang=en-US --disable-client-side-phishing-detection --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=7 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=4084 /prefetch:1
  2⤵
  PID:3148
- C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2172,7666088708097706576,14238856347648206429,131072 --lang=en-US --disable-client-side-phishing-detection --instant-process --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=8 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=3800 /prefetch:1
  2⤵
  PID:4924
- C:\Program Files (x86)\Microsoft\Edge\Application\92.0.902.67\identity_helper.exe
  "C:\Program Files (x86)\Microsoft\Edge\Application\92.0.902.67\identity_helper.exe" --type=utility --utility-sub-type=winrt_app_id.mojom.WinrtAppIdService --field-trial-handle=2172,7666088708097706576,14238856347648206429,131072 --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=5324 /prefetch:8
  2⤵
  PID:2232
- C:\Program Files (x86)\Microsoft\Edge\Application\92.0.902.67\identity_helper.exe
  "C:\Program Files (x86)\Microsoft\Edge\Application\92.0.902.67\identity_helper.exe" --type=utility --utility-sub-type=winrt_app_id.mojom.WinrtAppIdService --field-trial-handle=2172,7666088708097706576,14238856347648206429,131072 --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=5324 /prefetch:8
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  PID:1408
- C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2172,7666088708097706576,14238856347648206429,131072 --lang=en-US --disable-client-side-phishing-detection --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=10 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=5384 /prefetch:1
  2⤵
  PID:1836
- C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2172,7666088708097706576,14238856347648206429,131072 --lang=en-US --disable-client-side-phishing-detection --instant-process --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=11 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=5408 /prefetch:1
  2⤵
  PID:1932
- C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2172,7666088708097706576,14238856347648206429,131072 --lang=en-US --disable-client-side-phishing-detection --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=12 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=5044 /prefetch:1
  2⤵
  PID:4604
- C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=gpu-process --field-trial-handle=2172,7666088708097706576,14238856347648206429,131072 --disable-gpu-sandbox --use-gl=disabled --gpu-vendor-id=4318 --gpu-device-id=140 --gpu-sub-system-id=0 --gpu-revision=0 --gpu-driver-version=10.0.19041.546 --gpu-preferences=UAAAAAAAAADoAAAQAAAAAAAAAAAAAAAAAABgAAAEAAAwAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAHgAAAAAAAAAeAAAAAAAAAAoAAAABAAAACAAAAAAAAAAKAAAAAAAAAAwAAAAAAAAADgAAAAAAAAAEAAAAAAAAAAAAAAADQAAABAAAAAAAAAAAQAAAA0AAAAQAAAAAAAAAAQAAAANAAAAEAAAAAAAAAAHAAAADQAAAAgAAAAAAAAACAAAAAAAAAA= --mojo-platform-channel-handle=2644 /prefetch:2
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  PID:1112

C:\Windows\System32\CompPkgSrv.exe
C:\Windows\System32\CompPkgSrv.exe -Embedding
1⤵
PID:4148

C:\Windows\System32\CompPkgSrv.exe
C:\Windows\System32\CompPkgSrv.exe -Embedding
1⤵
PID:4656

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Crashpad\settings.dat

Filesize
152B

MD5
87f7abeb82600e1e640b843ad50fe0a1

SHA1
045bbada3f23fc59941bf7d0210fb160cb78ae87

SHA256
b35d6906050d90a81d23646f86c20a8f5d42f058ffc6436fb0a2b8bd71ee1262

SHA512
ea8e7f24ab823ad710ce079c86c40aa957353a00d2775732c23e31be88a10d212e974c4691279aa86016c4660f5795febf739a15207833df6ed964a9ed99d618

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Crashpad\settings.dat

Filesize
152B

MD5
f61fa5143fe872d1d8f1e9f8dc6544f9

SHA1
df44bab94d7388fb38c63085ec4db80cfc5eb009

SHA256
284a24b5b40860240db00ef3ae6a33c9fa8349ab5490a634e27b2c6e9a191c64

SHA512
971000784a6518bb39c5cf043292c7ab659162275470f5f6b632ea91a6bcae83bc80517ceb983dd5abfe8fb4e157344cb65c27e609a879eec00b33c5fad563a6

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\Preferences

Filesize
5KB

MD5
62a6e995f751d4923a3299bcd65935cc

SHA1
fa9e98a7ac91ddbfc5add18f86bb02435aa2d0f3

SHA256
4d79920da3bfff3ded9fcfb9d356c9bb7d6a1708a6d2e5d4b88906986a6f709f

SHA512
e5ea1fabaf69ffb71277cb2b4e9110138a11b65ffabcf122d86b614d04425403e6d64aeaf1cce3f687c9eeaf5e27be1781de799855fc08882972983f1a8e99ea

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\Preferences

Filesize
6KB

MD5
24f901acd095560458afa61d64c78bd6

SHA1
4b2a3817af4d44539dd5f76d39d941a10fc7b05b

SHA256
2659df0ae15a8c5322f66acaf08f1cb539fd414998e6e8752ec36edc5b0e65f3

SHA512
6f0058ec922aa8e09d895970686a99a425987d41659e71c00e448f481c25dd021a516b706be768e53074847e6d7e465615e62d64682b84c947f06d51516266e2

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\data_reduction_proxy_leveldb\CURRENT

Filesize
16B

MD5
6752a1d65b201c13b62ea44016eb221f

SHA1
58ecf154d01a62233ed7fb494ace3c3d4ffce08b

SHA256
0861415cada612ea5834d56e2cf1055d3e63979b69eb71d32ae9ae394d8306cd

SHA512
9cfd838d3fb570b44fc3461623ab2296123404c6c8f576b0de0aabd9a6020840d4c9125eb679ed384170dbcaac2fa30dc7fa9ee5b77d6df7c344a0aa030e0389

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Local State

Filesize
11KB

MD5
84f6337ededdb6115604c5cd38dd9d2f

SHA1
33c6729af486184137a0a1c29eab5e484a16f340

SHA256
bff66723b4ed1fc2343e2a8378615c589215fd7c7c339cf92b39935a86006865

SHA512
042cd94116cb6f3930940e70758eea253143e3c6f91a9e708ced9382391f2764ad4a5aa03d3e47f04cad2d5c0de57975519440df0844bc87c919681745c9a4c0

Download Submit
memory/3732-2-0x00007FF8D81B0000-0x00007FF8D8C71000-memory.dmp

Filesize
10.8MB

Download
memory/3732-3-0x000000001BA60000-0x000000001BAB0000-memory.dmp

Filesize
320KB

Download
memory/3732-4-0x000000001BB70000-0x000000001BC22000-memory.dmp

Filesize
712KB

Download
memory/3732-5-0x00007FF8D81B3000-0x00007FF8D81B5000-memory.dmp

Filesize
8KB

Download
memory/3732-1-0x0000000000040000-0x0000000000364000-memory.dmp

Filesize
3.1MB

Download
memory/3732-12-0x00007FF8D81B0000-0x00007FF8D8C71000-memory.dmp

Filesize
10.8MB

Download
memory/3732-0-0x00007FF8D81B3000-0x00007FF8D81B5000-memory.dmp

Filesize
8KB

Download