asyncrat | 2bb00b6059c1b0dacc9e952ccc1f819b09542f17eda7994a40d7ea361935ac34

General

Target

Infected.exe
Size

63KB
MD5

d1642320b4b4733552b78f746ccc2287
SHA1

bc473457b7a95e6bf31f87645ee021041f818afc
SHA256

2bb00b6059c1b0dacc9e952ccc1f819b09542f17eda7994a40d7ea361935ac34
SHA512

680c7ecfadd4203f673db5fd4e7d245bda57cc3aa49cd52cf9cbad3dfc0001331d206e90a255f2a1687bab5fbb482fa4cb288e167fd39287cdcaa5c11bea2542
SSDEEP

768:iil3pYNlrm78RIC8A+XjqazcBRL5JTk1+T4KSBGHmDbD/ph0oXz60m1avA74Su4V:Dyr0AdSJYUbdh9i15ju4dpqKmY7

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Botnet

Default

C2

147.185.221.23:64395

Attributes

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

aes.plain

Signatures

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

Async RAT payload 1 IoCs

rat

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Roaming\sigma.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:

Infected.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\Control Panel\International\Geo\Nation	Infected.exe

Executes dropped EXE 1 IoCs

Processes:

sigma.exe

pid process

4908 sigma.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

1176 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

1108 schtasks.exe

pid	process
4908	sigma.exe

pid	process
1176	timeout.exe

pid	process
1108	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

Processes:

Infected.exe

pid	process
3980	Infected.exe
3980	Infected.exe
3980	Infected.exe
3980	Infected.exe
3980	Infected.exe
3980	Infected.exe
3980	Infected.exe
3980	Infected.exe
3980	Infected.exe
3980	Infected.exe
3980	Infected.exe
3980	Infected.exe
3980	Infected.exe
3980	Infected.exe
3980	Infected.exe
3980	Infected.exe
3980	Infected.exe
3980	Infected.exe
3980	Infected.exe
3980	Infected.exe
3980	Infected.exe
3980	Infected.exe
3980	Infected.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

Infected.exesigma.exe

description pid process

Token: SeDebugPrivilege 3980 Infected.exe
Token: SeDebugPrivilege 4908 sigma.exe

description	pid	process
Token: SeDebugPrivilege	3980	Infected.exe
Token: SeDebugPrivilege	4908	sigma.exe

Suspicious use of WriteProcessMemory 10 IoCs

Processes:

Infected.execmd.execmd.exe

description	pid	process	target process
PID 3980 wrote to memory of 4668	3980	Infected.exe	cmd.exe
PID 3980 wrote to memory of 4668	3980	Infected.exe	cmd.exe
PID 3980 wrote to memory of 2748	3980	Infected.exe	cmd.exe
PID 3980 wrote to memory of 2748	3980	Infected.exe	cmd.exe
PID 4668 wrote to memory of 1108	4668	cmd.exe	schtasks.exe
PID 4668 wrote to memory of 1108	4668	cmd.exe	schtasks.exe
PID 2748 wrote to memory of 1176	2748	cmd.exe	timeout.exe
PID 2748 wrote to memory of 1176	2748	cmd.exe	timeout.exe
PID 2748 wrote to memory of 4908	2748	cmd.exe	sigma.exe
PID 2748 wrote to memory of 4908	2748	cmd.exe	sigma.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\Infected.exe
"C:\Users\Admin\AppData\Local\Temp\Infected.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3980
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "sigma" /tr '"C:\Users\Admin\AppData\Roaming\sigma.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4668
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "sigma" /tr '"C:\Users\Admin\AppData\Roaming\sigma.exe"'
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:1108
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpB92E.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2748
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:1176
- - C:\Users\Admin\AppData\Roaming\sigma.exe
    "C:\Users\Admin\AppData\Roaming\sigma.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:4908

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

2

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\tmpB92E.tmp.bat

Filesize
149B

MD5
f69724af1c1d3c72a35d52a976207533

SHA1
1097304bd926a6f8fc08ef0586f64f3bdbccdad5

SHA256
7b41d70387ca8be3145b74d270cac080cbeb9727fde264b486f3f992b6e9d0de

SHA512
2e18107ec2bfe40059b90f7990f7183a308541a2b1cb3de1969293f9f136bd43afc91c395480e2ecc3f8b082a38bdaa9c6cf31b1d07549595b519de2505eca2e

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

Filesize
63KB

MD5
d1642320b4b4733552b78f746ccc2287

SHA1
bc473457b7a95e6bf31f87645ee021041f818afc

SHA256
2bb00b6059c1b0dacc9e952ccc1f819b09542f17eda7994a40d7ea361935ac34

SHA512
680c7ecfadd4203f673db5fd4e7d245bda57cc3aa49cd52cf9cbad3dfc0001331d206e90a255f2a1687bab5fbb482fa4cb288e167fd39287cdcaa5c11bea2542

Download Submit
memory/3980-0-0x00007FF9184C3000-0x00007FF9184C5000-memory.dmp

Filesize
8KB

Download
memory/3980-1-0x0000000000720000-0x0000000000736000-memory.dmp

Filesize
88KB

Download
memory/3980-2-0x00007FF9184C0000-0x00007FF918F81000-memory.dmp

Filesize
10.8MB

Download
memory/3980-7-0x00007FF9184C0000-0x00007FF918F81000-memory.dmp

Filesize
10.8MB

Download
memory/3980-8-0x00007FF9184C0000-0x00007FF918F81000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads