asyncrat | d494670dad941c5f2f58a3ba4e6a5dfb2eb70265a14ef02db2937c8d679086eb

General

Target

Client.exe
Size

47KB
MD5

29aec1e80d556ddaea848196398fcc85
SHA1

efd928f0c29ea9ec9790797f544e730796e431f2
SHA256

d494670dad941c5f2f58a3ba4e6a5dfb2eb70265a14ef02db2937c8d679086eb
SHA512

75b811b4251f568dcd0cb4a6bb22c67475d979b2f54a729b44ea2d09cefc4894dbc80bcbdf0b9238fc4a3c357e8d675d8453084a620e94e47175f29915dae79c
SSDEEP

768:H3QgrILqiGm+LiAtelDSN+iV08YbygeHxQRSR31ybvEgK/JTRVc6KN:H39qAtKDs4zb1Cxp3KnkJTRVclN

Score

10^/10

asyncrat hawkeye default keylogger rat spyware stealer trojan

Malware Config

Extracted

Family

asyncrat

Version

1.0.7

Botnet

Default

C2

127.0.0.1:8848

127.0.0.1:22

127.0.0.1:23

ilovabby.ddns.net:8848

ilovabby.ddns.net:22

ilovabby.ddns.net:23

Mutex

DcRatMutex_qwqdanchun

Attributes

delay
1
install
true
install_file
Windowsupdate.exe
install_folder
%AppData%

aes.plain

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
rat asyncrat
HawkEye
HawkEye is a malware kit that has seen continuous development since at least 2013.
keylogger trojan stealer spyware hawkeye

Async RAT payload 1 IoCs

rat

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Roaming\Windowsupdate.exe	family_asyncrat

Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.

Query Registry
T1012

System Information Discovery
T1082

Processes:

Client.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation Client.exe
Executes dropped EXE 1 IoCs

Processes:

Windowsupdate.exe

pid process

3832 Windowsupdate.exe
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 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task/Job
T1053

Processes:

schtasks.exe

pid process

1580 schtasks.exe
Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

4924 timeout.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	Client.exe

pid	process
3832	Windowsupdate.exe

pid	process
1580	schtasks.exe

pid	process
4924	timeout.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

Processes:

Client.exeWindowsupdate.exe

pid	process
5064	Client.exe
5064	Client.exe
5064	Client.exe
5064	Client.exe
5064	Client.exe
5064	Client.exe
5064	Client.exe
5064	Client.exe
5064	Client.exe
5064	Client.exe
5064	Client.exe
5064	Client.exe
5064	Client.exe
5064	Client.exe
5064	Client.exe
5064	Client.exe
5064	Client.exe
5064	Client.exe
5064	Client.exe
5064	Client.exe
5064	Client.exe
5064	Client.exe
5064	Client.exe
5064	Client.exe
5064	Client.exe
5064	Client.exe
5064	Client.exe
5064	Client.exe
5064	Client.exe
5064	Client.exe
5064	Client.exe
5064	Client.exe
5064	Client.exe
5064	Client.exe
5064	Client.exe
5064	Client.exe
5064	Client.exe
5064	Client.exe
5064	Client.exe
5064	Client.exe
5064	Client.exe
3832	Windowsupdate.exe
3832	Windowsupdate.exe
3832	Windowsupdate.exe
3832	Windowsupdate.exe
3832	Windowsupdate.exe
3832	Windowsupdate.exe
3832	Windowsupdate.exe
3832	Windowsupdate.exe
3832	Windowsupdate.exe
3832	Windowsupdate.exe
3832	Windowsupdate.exe
3832	Windowsupdate.exe
3832	Windowsupdate.exe
3832	Windowsupdate.exe
3832	Windowsupdate.exe
3832	Windowsupdate.exe
3832	Windowsupdate.exe
3832	Windowsupdate.exe
3832	Windowsupdate.exe
3832	Windowsupdate.exe
3832	Windowsupdate.exe
3832	Windowsupdate.exe
3832	Windowsupdate.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

Client.exeWindowsupdate.exe

description pid process

Token: SeDebugPrivilege 5064 Client.exe
Token: SeDebugPrivilege 3832 Windowsupdate.exe

description	pid	process
Token: SeDebugPrivilege	5064	Client.exe
Token: SeDebugPrivilege	3832	Windowsupdate.exe

Suspicious use of WriteProcessMemory 10 IoCs

Processes:

Client.execmd.execmd.exe

description	pid	process	target process
PID 5064 wrote to memory of 2760	5064	Client.exe	cmd.exe
PID 5064 wrote to memory of 2760	5064	Client.exe	cmd.exe
PID 5064 wrote to memory of 4424	5064	Client.exe	cmd.exe
PID 5064 wrote to memory of 4424	5064	Client.exe	cmd.exe
PID 4424 wrote to memory of 4924	4424	cmd.exe	timeout.exe
PID 4424 wrote to memory of 4924	4424	cmd.exe	timeout.exe
PID 2760 wrote to memory of 1580	2760	cmd.exe	schtasks.exe
PID 2760 wrote to memory of 1580	2760	cmd.exe	schtasks.exe
PID 4424 wrote to memory of 3832	4424	cmd.exe	Windowsupdate.exe
PID 4424 wrote to memory of 3832	4424	cmd.exe	Windowsupdate.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.exe
"C:\Users\Admin\AppData\Local\Temp\Client.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5064

C:\Windows\System32\cmd.exe
"C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "Windowsupdate" /tr '"C:\Users\Admin\AppData\Roaming\Windowsupdate.exe"' & exit
2⤵
- Suspicious use of WriteProcessMemory
PID:2760

C:\Windows\system32\schtasks.exe
schtasks /create /f /sc onlogon /rl highest /tn "Windowsupdate" /tr '"C:\Users\Admin\AppData\Roaming\Windowsupdate.exe"'
3⤵
- Creates scheduled task(s)
PID:1580

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp1F7A.tmp.bat""
2⤵
- Suspicious use of WriteProcessMemory
PID:4424

C:\Windows\system32\timeout.exe
timeout 3
3⤵
- Delays execution with timeout.exe
PID:4924

C:\Users\Admin\AppData\Roaming\Windowsupdate.exe
"C:\Users\Admin\AppData\Roaming\Windowsupdate.exe"
3⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:3832

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=4232 --field-trial-handle=2656,i,16940681401824032220,151921362336696246,262144 --variations-seed-version /prefetch:8
1⤵
PID:872

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Scheduled Task/Job

1

T1053

Persistence

Scheduled Task/Job

1

T1053

Privilege Escalation

Scheduled Task/Job

1

T1053

Defense Evasion

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp1F7A.tmp.bat
Filesize
157B

MD5
ce678c952c12bb03f2b264c99a798238

SHA1
3b2d5779db5a97c9e28bc9f4d94334f1d46391ae

SHA256
bce0f1769732bb95d8afc0ff356cc9353d0fc91d49dd562d6c9c8e712223c4ac

SHA512
a618d90ccf6f49431f37f8ac56fc265d3045314dedd718d5965aa17a800b2cb0795a14bdfca32ba1c80ddad9e59f0a2d1108fae0b194c8377e30028d947e393f

Download Submit
C:\Users\Admin\AppData\Roaming\Windowsupdate.exe
Filesize
47KB

MD5
29aec1e80d556ddaea848196398fcc85

SHA1
efd928f0c29ea9ec9790797f544e730796e431f2

SHA256
d494670dad941c5f2f58a3ba4e6a5dfb2eb70265a14ef02db2937c8d679086eb

SHA512
75b811b4251f568dcd0cb4a6bb22c67475d979b2f54a729b44ea2d09cefc4894dbc80bcbdf0b9238fc4a3c357e8d675d8453084a620e94e47175f29915dae79c

Download Submit
memory/5064-0-0x00007FFCA3103000-0x00007FFCA3105000-memory.dmp

Filesize
8KB

Download
memory/5064-1-0x00000000005C0000-0x00000000005D2000-memory.dmp

Filesize
72KB

Download
memory/5064-2-0x00007FFCA3100000-0x00007FFCA3BC1000-memory.dmp

Filesize
10.8MB

Download
memory/5064-7-0x00007FFCA3100000-0x00007FFCA3BC1000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads