asyncrat | 9ca7ff61cdaa9b05da46da07587a4183f4ed3bdacf781e04e229f695d7d73000

General

Target

9ca7ff61cdaa9b05da46da07587a4183f4ed3bdacf781e04e229f695d7d73000N.exe
Size

47KB
MD5

4e0b89c963682a4a458d5b600d8facd0
SHA1

72b2cfe0bc78d556247562431565f55d2ac41acb
SHA256

9ca7ff61cdaa9b05da46da07587a4183f4ed3bdacf781e04e229f695d7d73000
SHA512

2a484bac3c9ce89f9273626c0f1a46fd3a25538c1688a6387c22e1f6224a54cccbc657743155b4a71b0206d59a1c346b4b117d323383395f876d39e180da3f8d
SSDEEP

768:IRUQgNIL4+M0+LiXPtWiEN8YbOgPE+iCrMvEgK/JXZVc6KN:IR1gjsXPt6zbxM+1AnkJXZVclN

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Version

1.0.7

Botnet

Default

C2

zlehsdl-54193.portmap.host:54193

Mutex

Mutex_manL

Attributes

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

aes.plain

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
rat asyncrat

Async RAT payload 1 IoCs

rat

Processes:

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

Executes dropped EXE 1 IoCs

Processes:

client.exe

pid process

2932 client.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

1500 timeout.exe
Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence execution

Scheduled Task
T1053.005

Processes:

schtasks.exe

pid process

2776 schtasks.exe

pid	process
2932	client.exe

pid	process
1500	timeout.exe

pid	process
2776	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

Processes:

9ca7ff61cdaa9b05da46da07587a4183f4ed3bdacf781e04e229f695d7d73000N.exe

pid	process
2524	9ca7ff61cdaa9b05da46da07587a4183f4ed3bdacf781e04e229f695d7d73000N.exe
2524	9ca7ff61cdaa9b05da46da07587a4183f4ed3bdacf781e04e229f695d7d73000N.exe
2524	9ca7ff61cdaa9b05da46da07587a4183f4ed3bdacf781e04e229f695d7d73000N.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

9ca7ff61cdaa9b05da46da07587a4183f4ed3bdacf781e04e229f695d7d73000N.execlient.exe

description	pid	process
Token: SeDebugPrivilege	2524	9ca7ff61cdaa9b05da46da07587a4183f4ed3bdacf781e04e229f695d7d73000N.exe
Token: SeDebugPrivilege	2932	client.exe

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

9ca7ff61cdaa9b05da46da07587a4183f4ed3bdacf781e04e229f695d7d73000N.execmd.execmd.exe

description	pid	process	target process
PID 2524 wrote to memory of 1476	2524	9ca7ff61cdaa9b05da46da07587a4183f4ed3bdacf781e04e229f695d7d73000N.exe	cmd.exe
PID 2524 wrote to memory of 1476	2524	9ca7ff61cdaa9b05da46da07587a4183f4ed3bdacf781e04e229f695d7d73000N.exe	cmd.exe
PID 2524 wrote to memory of 1476	2524	9ca7ff61cdaa9b05da46da07587a4183f4ed3bdacf781e04e229f695d7d73000N.exe	cmd.exe
PID 2524 wrote to memory of 2988	2524	9ca7ff61cdaa9b05da46da07587a4183f4ed3bdacf781e04e229f695d7d73000N.exe	cmd.exe
PID 2524 wrote to memory of 2988	2524	9ca7ff61cdaa9b05da46da07587a4183f4ed3bdacf781e04e229f695d7d73000N.exe	cmd.exe
PID 2524 wrote to memory of 2988	2524	9ca7ff61cdaa9b05da46da07587a4183f4ed3bdacf781e04e229f695d7d73000N.exe	cmd.exe
PID 2988 wrote to memory of 1500	2988	cmd.exe	timeout.exe
PID 2988 wrote to memory of 1500	2988	cmd.exe	timeout.exe
PID 2988 wrote to memory of 1500	2988	cmd.exe	timeout.exe
PID 1476 wrote to memory of 2776	1476	cmd.exe	schtasks.exe
PID 1476 wrote to memory of 2776	1476	cmd.exe	schtasks.exe
PID 1476 wrote to memory of 2776	1476	cmd.exe	schtasks.exe
PID 2988 wrote to memory of 2932	2988	cmd.exe	client.exe
PID 2988 wrote to memory of 2932	2988	cmd.exe	client.exe
PID 2988 wrote to memory of 2932	2988	cmd.exe	client.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\9ca7ff61cdaa9b05da46da07587a4183f4ed3bdacf781e04e229f695d7d73000N.exe
"C:\Users\Admin\AppData\Local\Temp\9ca7ff61cdaa9b05da46da07587a4183f4ed3bdacf781e04e229f695d7d73000N.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2524

C:\Windows\System32\cmd.exe
"C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "client" /tr '"C:\Users\Admin\AppData\Roaming\client.exe"' & exit
2⤵
- Suspicious use of WriteProcessMemory
PID:1476

C:\Windows\system32\schtasks.exe
schtasks /create /f /sc onlogon /rl highest /tn "client" /tr '"C:\Users\Admin\AppData\Roaming\client.exe"'
3⤵
- Scheduled Task/Job: Scheduled Task
PID:2776

C:\Windows\system32\cmd.exe
cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpA718.tmp.bat""
2⤵
- Suspicious use of WriteProcessMemory
PID:2988

C:\Windows\system32\timeout.exe
timeout 3
3⤵
- Delays execution with timeout.exe
PID:1500

C:\Users\Admin\AppData\Roaming\client.exe
"C:\Users\Admin\AppData\Roaming\client.exe"
3⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2932

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmpA718.tmp.bat

Filesize
150B

MD5
278167571893d426b58f562c310f5304

SHA1
137f4c2c8a6a259d546985b22cdeb3b0c6d61ccf

SHA256
4183103f226848966c7865b30c1844b73020d632410b9d8d10a683e531728c05

SHA512
6b53e20ecd7cbd8ab45581b7c91187fd58880591b59c1d11fb61f80f7144b777a6e4defba287a3cede7bad8820b050c8693a1cd7671c41a0cfbe9a0279a43403

Download Submit
C:\Users\Admin\AppData\Roaming\client.exe

Filesize
47KB

MD5
4e0b89c963682a4a458d5b600d8facd0

SHA1
72b2cfe0bc78d556247562431565f55d2ac41acb

SHA256
9ca7ff61cdaa9b05da46da07587a4183f4ed3bdacf781e04e229f695d7d73000

SHA512
2a484bac3c9ce89f9273626c0f1a46fd3a25538c1688a6387c22e1f6224a54cccbc657743155b4a71b0206d59a1c346b4b117d323383395f876d39e180da3f8d

Download Submit
memory/2524-0-0x000007FEF6133000-0x000007FEF6134000-memory.dmp

Filesize
4KB

Download
memory/2524-1-0x0000000001180000-0x0000000001192000-memory.dmp

Filesize
72KB

Download
memory/2524-2-0x000007FEF6130000-0x000007FEF6B1C000-memory.dmp

Filesize
9.9MB

Download
memory/2524-12-0x000007FEF6130000-0x000007FEF6B1C000-memory.dmp

Filesize
9.9MB

Download
memory/2932-16-0x0000000000950000-0x0000000000962000-memory.dmp

Filesize
72KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads