asyncrat | 9e06b7c674cac8288caedab6c882b20dc66aa7e83299c724801791d402e5818c

General

Target

KGk7fkL6.exe
Size

45KB
MD5

6c3eefa15c5dcf8046a280f434363488
SHA1

ba5ddc35cf6c386e3353973669d02c9379077b08
SHA256

9e06b7c674cac8288caedab6c882b20dc66aa7e83299c724801791d402e5818c
SHA512

282172cc98f831b9719f63e4e723426f2145053f725a3940d06cd975fd45790199f4adb0c308678f2a63d7bf846f6c2efbbe62b7acf75466f1fc8851da89b92e

Score

10^/10

asyncrat rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

C2

Tktlert.kro.kr:5000

Mutex

dwadwad1aw98d1965gtf*h47eft65h14fte98h41rt6h1ft789h41rft9h

Attributes

aes_key
kuTGboagNLBMaK5ftkoTGf5T7oZj2sRO
anti_detection
true
autorun
true
bdos
true
delay
Default
host
Tktlert.kro.kr
hwid
3
install_file
install_folder
%Temp%
mutex
dwadwad1aw98d1965gtf*h47eft65h14fte98h41rt6h1ft789h41rft9h
pastebin_config
null
port
5000
version
0.5.7B

aes.plain

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers.
rat asyncrat

Async RAT payload 3 IoCs

rat

Processes:

resource	yara_rule
\Users\Admin\AppData\Local\Temp\z1z.exe	asyncrat
C:\Users\Admin\AppData\Local\Temp\z1z.exe	asyncrat
C:\Users\Admin\AppData\Local\Temp\z1z.exe	asyncrat

Executes dropped EXE 1 IoCs

Processes:

z1z.exe

pid process

868 z1z.exe
Loads dropped DLL 1 IoCs

Processes:

cmd.exe

pid process

1044 cmd.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

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
T1053

Processes:

schtasks.exe

pid process

1696 schtasks.exe
Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

1708 timeout.exe
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

KGk7fkL6.exe

pid process

1840 KGk7fkL6.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

KGk7fkL6.exez1z.exe

description pid process

Token: SeDebugPrivilege 1840 KGk7fkL6.exe
Token: SeDebugPrivilege 868 z1z.exe
Token: SeDebugPrivilege 868 z1z.exe

pid	process
868	z1z.exe

pid	process
1044	cmd.exe

pid	process
1696	schtasks.exe

pid	process
1708	timeout.exe

pid	process
1840	KGk7fkL6.exe

description	pid	process
Token: SeDebugPrivilege	1840	KGk7fkL6.exe
Token: SeDebugPrivilege	868	z1z.exe
Token: SeDebugPrivilege	868	z1z.exe

Suspicious use of WriteProcessMemory 20 IoCs

Processes:

KGk7fkL6.execmd.execmd.exe

description	pid	process	target process
PID 1840 wrote to memory of 1504	1840	KGk7fkL6.exe	cmd.exe
PID 1840 wrote to memory of 1504	1840	KGk7fkL6.exe	cmd.exe
PID 1840 wrote to memory of 1504	1840	KGk7fkL6.exe	cmd.exe
PID 1840 wrote to memory of 1504	1840	KGk7fkL6.exe	cmd.exe
PID 1840 wrote to memory of 1044	1840	KGk7fkL6.exe	cmd.exe
PID 1840 wrote to memory of 1044	1840	KGk7fkL6.exe	cmd.exe
PID 1840 wrote to memory of 1044	1840	KGk7fkL6.exe	cmd.exe
PID 1840 wrote to memory of 1044	1840	KGk7fkL6.exe	cmd.exe
PID 1504 wrote to memory of 1696	1504	cmd.exe	schtasks.exe
PID 1504 wrote to memory of 1696	1504	cmd.exe	schtasks.exe
PID 1504 wrote to memory of 1696	1504	cmd.exe	schtasks.exe
PID 1504 wrote to memory of 1696	1504	cmd.exe	schtasks.exe
PID 1044 wrote to memory of 1708	1044	cmd.exe	timeout.exe
PID 1044 wrote to memory of 1708	1044	cmd.exe	timeout.exe
PID 1044 wrote to memory of 1708	1044	cmd.exe	timeout.exe
PID 1044 wrote to memory of 1708	1044	cmd.exe	timeout.exe
PID 1044 wrote to memory of 868	1044	cmd.exe	z1z.exe
PID 1044 wrote to memory of 868	1044	cmd.exe	z1z.exe
PID 1044 wrote to memory of 868	1044	cmd.exe	z1z.exe
PID 1044 wrote to memory of 868	1044	cmd.exe	z1z.exe

C:\Users\Admin\AppData\Local\Temp\KGk7fkL6.exe
"C:\Users\Admin\AppData\Local\Temp\KGk7fkL6.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1840

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "z1z" /tr '"C:\Users\Admin\AppData\Local\Temp\z1z.exe"' & exit
2⤵
- Suspicious use of WriteProcessMemory
PID:1504

C:\Windows\SysWOW64\schtasks.exe
schtasks /create /f /sc onlogon /rl highest /tn "z1z" /tr '"C:\Users\Admin\AppData\Local\Temp\z1z.exe"'
3⤵
- Creates scheduled task(s)
PID:1696

C:\Windows\SysWOW64\cmd.exe
cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpC311.tmp.bat""
2⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1044

C:\Windows\SysWOW64\timeout.exe
timeout 3
3⤵
- Delays execution with timeout.exe
PID:1708

C:\Users\Admin\AppData\Local\Temp\z1z.exe
"C:\Users\Admin\AppData\Local\Temp\z1z.exe"
3⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:868

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmpC311.tmp.bat
MD5
dddeed56fe92adf6eeed259b9dcd99b6

SHA1
b4a985d5ec91beb7a55af4bc3dcfd27fd38b11d4

SHA256
cc4cc8a4c908584fa8318b64d21145bb6249b802deb955ca331306a6fa395eab

SHA512
fa6d0860b22ae6afff3174eed1fc6734c61d87e7fc693b382a104eb3781c14f45162bf93a0301436690b16a63c1e2397686d44bccd745a7e4d70546e5955f43b

Download Submit
C:\Users\Admin\AppData\Local\Temp\z1z.exe
MD5
6c3eefa15c5dcf8046a280f434363488

SHA1
ba5ddc35cf6c386e3353973669d02c9379077b08

SHA256
9e06b7c674cac8288caedab6c882b20dc66aa7e83299c724801791d402e5818c

SHA512
282172cc98f831b9719f63e4e723426f2145053f725a3940d06cd975fd45790199f4adb0c308678f2a63d7bf846f6c2efbbe62b7acf75466f1fc8851da89b92e

Download Submit
C:\Users\Admin\AppData\Local\Temp\z1z.exe
MD5
6c3eefa15c5dcf8046a280f434363488

SHA1
ba5ddc35cf6c386e3353973669d02c9379077b08

SHA256
9e06b7c674cac8288caedab6c882b20dc66aa7e83299c724801791d402e5818c

SHA512
282172cc98f831b9719f63e4e723426f2145053f725a3940d06cd975fd45790199f4adb0c308678f2a63d7bf846f6c2efbbe62b7acf75466f1fc8851da89b92e

Download Submit
\Users\Admin\AppData\Local\Temp\z1z.exe
MD5
6c3eefa15c5dcf8046a280f434363488

SHA1
ba5ddc35cf6c386e3353973669d02c9379077b08

SHA256
9e06b7c674cac8288caedab6c882b20dc66aa7e83299c724801791d402e5818c

SHA512
282172cc98f831b9719f63e4e723426f2145053f725a3940d06cd975fd45790199f4adb0c308678f2a63d7bf846f6c2efbbe62b7acf75466f1fc8851da89b92e

Download Submit
memory/868-70-0x0000000000000000-mapping.dmp

Download
memory/868-72-0x00000000000E0000-0x00000000000E1000-memory.dmp

Filesize
4KB

Download
memory/868-75-0x0000000002120000-0x0000000002121000-memory.dmp

Filesize
4KB

Download
memory/1044-64-0x0000000000000000-mapping.dmp

Download
memory/1504-63-0x0000000000000000-mapping.dmp

Download
memory/1696-65-0x0000000000000000-mapping.dmp

Download
memory/1708-67-0x0000000000000000-mapping.dmp

Download
memory/1840-62-0x00000000009B0000-0x00000000009B1000-memory.dmp

Filesize
4KB

Download
memory/1840-61-0x00000000757C1000-0x00000000757C3000-memory.dmp

Filesize
8KB

Download
memory/1840-59-0x0000000000A70000-0x0000000000A71000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads