asyncrat | e17aa5e68d9acc532fc49febca4c7072496df5e47183e3d10d8f89b31c160cf5

General

Target

SeroXen.exe
Size

158KB
MD5

9fbd542a485a60bc5f9dd053c6917b3c
SHA1

b02791c1f6d06133b91f047c5131469502247924
SHA256

e17aa5e68d9acc532fc49febca4c7072496df5e47183e3d10d8f89b31c160cf5
SHA512

f51e3fd84a3d0d059777fcf44a6154a33b6eee94c40065d5cf454a3489230c1daf4ed3c65f134f3ebcf1c024d485c4a270041567932fc9d06d1998a6298a5b3b
SSDEEP

3072:YuGkTQaI2ObNc3RnbzgF50mmEuxnetCje3ew33Wv1x:YuGixl3RnbcH0cuxetC+33Wvz

Score

10^/10

asyncrat hawkeye async keylogger rat spyware stealer trojan

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Async

C2

140.238.91.110:42341

Mutex

GW7yTStHluEa

Attributes

delay
3
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:

SeroXen.exe

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

Executes dropped EXE 1 IoCs

Processes:

WindowsUpdate.exe

pid process

2276 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

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

Processes:

timeout.exe

pid process

1016 timeout.exe

pid	process
2276	WindowsUpdate.exe

pid	process
504	schtasks.exe

pid	process
1016	timeout.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

Processes:

SeroXen.exe

pid	process
3664	SeroXen.exe
3664	SeroXen.exe
3664	SeroXen.exe
3664	SeroXen.exe
3664	SeroXen.exe
3664	SeroXen.exe
3664	SeroXen.exe
3664	SeroXen.exe
3664	SeroXen.exe
3664	SeroXen.exe
3664	SeroXen.exe
3664	SeroXen.exe
3664	SeroXen.exe
3664	SeroXen.exe
3664	SeroXen.exe
3664	SeroXen.exe
3664	SeroXen.exe
3664	SeroXen.exe
3664	SeroXen.exe
3664	SeroXen.exe
3664	SeroXen.exe
3664	SeroXen.exe
3664	SeroXen.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

SeroXen.exeWindowsUpdate.exe

description pid process

Token: SeDebugPrivilege 3664 SeroXen.exe
Token: SeDebugPrivilege 2276 WindowsUpdate.exe
Token: SeDebugPrivilege 2276 WindowsUpdate.exe

description	pid	process
Token: SeDebugPrivilege	3664	SeroXen.exe
Token: SeDebugPrivilege	2276	WindowsUpdate.exe
Token: SeDebugPrivilege	2276	WindowsUpdate.exe

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

SeroXen.execmd.execmd.exe

description	pid	process	target process
PID 3664 wrote to memory of 700	3664	SeroXen.exe	cmd.exe
PID 3664 wrote to memory of 700	3664	SeroXen.exe	cmd.exe
PID 3664 wrote to memory of 700	3664	SeroXen.exe	cmd.exe
PID 3664 wrote to memory of 4872	3664	SeroXen.exe	cmd.exe
PID 3664 wrote to memory of 4872	3664	SeroXen.exe	cmd.exe
PID 3664 wrote to memory of 4872	3664	SeroXen.exe	cmd.exe
PID 700 wrote to memory of 504	700	cmd.exe	schtasks.exe
PID 700 wrote to memory of 504	700	cmd.exe	schtasks.exe
PID 700 wrote to memory of 504	700	cmd.exe	schtasks.exe
PID 4872 wrote to memory of 1016	4872	cmd.exe	timeout.exe
PID 4872 wrote to memory of 1016	4872	cmd.exe	timeout.exe
PID 4872 wrote to memory of 1016	4872	cmd.exe	timeout.exe
PID 4872 wrote to memory of 2276	4872	cmd.exe	WindowsUpdate.exe
PID 4872 wrote to memory of 2276	4872	cmd.exe	WindowsUpdate.exe
PID 4872 wrote to memory of 2276	4872	cmd.exe	WindowsUpdate.exe

C:\Users\Admin\AppData\Local\Temp\SeroXen.exe
"C:\Users\Admin\AppData\Local\Temp\SeroXen.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3664

C:\Windows\SysWOW64\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:700

C:\Windows\SysWOW64\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:504

C:\Windows\SysWOW64\cmd.exe
C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp1C4D.tmp.bat""
2⤵
- Suspicious use of WriteProcessMemory
PID:4872

C:\Windows\SysWOW64\timeout.exe
timeout 3
3⤵
- Delays execution with timeout.exe
PID:1016

C:\Users\Admin\AppData\Roaming\WindowsUpdate.exe
"C:\Users\Admin\AppData\Roaming\WindowsUpdate.exe"
3⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2276

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=4828 --field-trial-handle=2244,i,11878111470816612087,2265290141962607370,262144 --variations-seed-version /prefetch:8
1⤵
PID:4816

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

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

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp1C4D.tmp.bat
Filesize
157B

MD5
d37b19a5d760582a267312a8d3db14d9

SHA1
566f284300b90a23363570ca826403d2647419f0

SHA256
5da4ba5eeaad5e9ba5c648b9f6e83f55e71f038de8cf1b15768815d80b1adf93

SHA512
dce78a8b17a811554880a273e7aa19e228696b47ac1273f4965516174d2619166c18f267d25e348b2f69cde22f2d3ae415445fc01b9636866f967b74529a1de7

Download Submit
C:\Users\Admin\AppData\Roaming\WindowsUpdate.exe
Filesize
158KB

MD5
9fbd542a485a60bc5f9dd053c6917b3c

SHA1
b02791c1f6d06133b91f047c5131469502247924

SHA256
e17aa5e68d9acc532fc49febca4c7072496df5e47183e3d10d8f89b31c160cf5

SHA512
f51e3fd84a3d0d059777fcf44a6154a33b6eee94c40065d5cf454a3489230c1daf4ed3c65f134f3ebcf1c024d485c4a270041567932fc9d06d1998a6298a5b3b

Download Submit
memory/2276-14-0x0000000074910000-0x00000000750C0000-memory.dmp

Filesize
7.7MB

Download
memory/2276-15-0x00000000056C0000-0x00000000056D0000-memory.dmp

Filesize
64KB

Download
memory/2276-16-0x0000000074910000-0x00000000750C0000-memory.dmp

Filesize
7.7MB

Download
memory/2276-17-0x00000000056C0000-0x00000000056D0000-memory.dmp

Filesize
64KB

Download
memory/3664-0-0x00000000749B0000-0x0000000075160000-memory.dmp

Filesize
7.7MB

Download
memory/3664-1-0x0000000000270000-0x000000000029E000-memory.dmp

Filesize
184KB

Download
memory/3664-2-0x0000000004C00000-0x0000000004C10000-memory.dmp

Filesize
64KB

Download
memory/3664-3-0x0000000004D80000-0x0000000004DE6000-memory.dmp

Filesize
408KB

Download
memory/3664-4-0x00000000051D0000-0x000000000526C000-memory.dmp

Filesize
624KB

Download
memory/3664-10-0x00000000749B0000-0x0000000075160000-memory.dmp

Filesize
7.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads