asyncrat | 8d3c1998cd2cbda52f34457dc4c5419264a526abe4d5a9db342a98d4b4724bff

General

Target

203a36cb6fa53ca76382495338076ee9.exe
Size

48KB
MD5

203a36cb6fa53ca76382495338076ee9
SHA1

7f92d6ca26a2e4976d9fc0b438f107ab4a419ea6
SHA256

8d3c1998cd2cbda52f34457dc4c5419264a526abe4d5a9db342a98d4b4724bff
SHA512

0b9f9b30ce74046d78adc72ae1f6ff09920050eca1a84775beb79c9912267780eef817f49018507697b9546f8f7a9fc56d18b93d2796572e1b2ce7b9b2454470
SSDEEP

768:0ugyNTjgkH7F7WUHw9pmo2q7ecAwB8ZaPIOsj/1D0bWd8XvrXWavq/h66OBDZic+:0ugyNTcI42AB8ZjOspobe+TXWPhDAdz+

Score

10^/10

asyncrat 21 rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

21

C2

81.161.229.73:6606

81.161.229.73:7707

81.161.229.73:8808

Mutex

AsyncMutex_6SI8OkPnk

Attributes

delay
10
install
true
install_file
poo.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 3 IoCs

rat

resource	yara_rule
behavioral2/memory/2100-1-0x0000000000510000-0x0000000000522000-memory.dmp	asyncrat
behavioral2/files/0x00080000000231da-13.dat	asyncrat
behavioral2/files/0x00080000000231da-14.dat	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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1045988481-1457812719-2617974652-1000\Control Panel\International\Geo\Nation	203a36cb6fa53ca76382495338076ee9.exe

Executes dropped EXE 1 IoCs

pid	Process
5020	poo.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

pid	Process
4380	schtasks.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1716	timeout.exe

Suspicious behavior: EnumeratesProcesses 21 IoCs

pid	Process
2100	203a36cb6fa53ca76382495338076ee9.exe
2100	203a36cb6fa53ca76382495338076ee9.exe
2100	203a36cb6fa53ca76382495338076ee9.exe
2100	203a36cb6fa53ca76382495338076ee9.exe
2100	203a36cb6fa53ca76382495338076ee9.exe
2100	203a36cb6fa53ca76382495338076ee9.exe
2100	203a36cb6fa53ca76382495338076ee9.exe
2100	203a36cb6fa53ca76382495338076ee9.exe
2100	203a36cb6fa53ca76382495338076ee9.exe
2100	203a36cb6fa53ca76382495338076ee9.exe
2100	203a36cb6fa53ca76382495338076ee9.exe
2100	203a36cb6fa53ca76382495338076ee9.exe
2100	203a36cb6fa53ca76382495338076ee9.exe
2100	203a36cb6fa53ca76382495338076ee9.exe
2100	203a36cb6fa53ca76382495338076ee9.exe
2100	203a36cb6fa53ca76382495338076ee9.exe
2100	203a36cb6fa53ca76382495338076ee9.exe
2100	203a36cb6fa53ca76382495338076ee9.exe
2100	203a36cb6fa53ca76382495338076ee9.exe
2100	203a36cb6fa53ca76382495338076ee9.exe
2100	203a36cb6fa53ca76382495338076ee9.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2100	203a36cb6fa53ca76382495338076ee9.exe
Token: SeDebugPrivilege	5020	poo.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2100 wrote to memory of 1448	2100	203a36cb6fa53ca76382495338076ee9.exe	93
PID 2100 wrote to memory of 1448	2100	203a36cb6fa53ca76382495338076ee9.exe	93
PID 2100 wrote to memory of 1448	2100	203a36cb6fa53ca76382495338076ee9.exe	93
PID 2100 wrote to memory of 3172	2100	203a36cb6fa53ca76382495338076ee9.exe	95
PID 2100 wrote to memory of 3172	2100	203a36cb6fa53ca76382495338076ee9.exe	95
PID 2100 wrote to memory of 3172	2100	203a36cb6fa53ca76382495338076ee9.exe	95
PID 1448 wrote to memory of 4380	1448	cmd.exe	97
PID 1448 wrote to memory of 4380	1448	cmd.exe	97
PID 1448 wrote to memory of 4380	1448	cmd.exe	97
PID 3172 wrote to memory of 1716	3172	cmd.exe	98
PID 3172 wrote to memory of 1716	3172	cmd.exe	98
PID 3172 wrote to memory of 1716	3172	cmd.exe	98
PID 3172 wrote to memory of 5020	3172	cmd.exe	99
PID 3172 wrote to memory of 5020	3172	cmd.exe	99
PID 3172 wrote to memory of 5020	3172	cmd.exe	99

C:\Users\Admin\AppData\Local\Temp\203a36cb6fa53ca76382495338076ee9.exe
"C:\Users\Admin\AppData\Local\Temp\203a36cb6fa53ca76382495338076ee9.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2100
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "poo" /tr '"C:\Users\Admin\AppData\Roaming\poo.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1448
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "poo" /tr '"C:\Users\Admin\AppData\Roaming\poo.exe"'
    3⤵
    - Creates scheduled task(s)
    PID:4380
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpECEB.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3172
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:1716
- - C:\Users\Admin\AppData\Roaming\poo.exe
    "C:\Users\Admin\AppData\Roaming\poo.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:5020

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\tmpECEB.tmp.bat

Filesize
147B

MD5
ae038e63dc9968bb4d4af4d724811e58

SHA1
a6ff2549c0e3aa6b7987b9d0ff3b82e562f7e058

SHA256
7b493e9038816b5a7fea70063bcac9aab4c2009bfff4579029fe6ca4e5b75007

SHA512
ff5983c5bdfbaeb822932301c20d25768810209a591e77bf51dcd3545ebdb0677bcd14a6200189a1571ca89165031e97e4842891af1718a87ff7c9b8ca314d11

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

Filesize
48KB

MD5
203a36cb6fa53ca76382495338076ee9

SHA1
7f92d6ca26a2e4976d9fc0b438f107ab4a419ea6

SHA256
8d3c1998cd2cbda52f34457dc4c5419264a526abe4d5a9db342a98d4b4724bff

SHA512
0b9f9b30ce74046d78adc72ae1f6ff09920050eca1a84775beb79c9912267780eef817f49018507697b9546f8f7a9fc56d18b93d2796572e1b2ce7b9b2454470

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

Filesize
48KB

MD5
203a36cb6fa53ca76382495338076ee9

SHA1
7f92d6ca26a2e4976d9fc0b438f107ab4a419ea6

SHA256
8d3c1998cd2cbda52f34457dc4c5419264a526abe4d5a9db342a98d4b4724bff

SHA512
0b9f9b30ce74046d78adc72ae1f6ff09920050eca1a84775beb79c9912267780eef817f49018507697b9546f8f7a9fc56d18b93d2796572e1b2ce7b9b2454470

Download Submit
memory/2100-3-0x00000000051E0000-0x00000000051F0000-memory.dmp

Filesize
64KB

Download
memory/2100-4-0x0000000005260000-0x00000000052C6000-memory.dmp

Filesize
408KB

Download
memory/2100-5-0x0000000005470000-0x000000000550C000-memory.dmp

Filesize
624KB

Download
memory/2100-2-0x00000000748C0000-0x0000000075070000-memory.dmp

Filesize
7.7MB

Download
memory/2100-11-0x00000000748C0000-0x0000000075070000-memory.dmp

Filesize
7.7MB

Download
memory/2100-1-0x0000000000510000-0x0000000000522000-memory.dmp

Filesize
72KB

Download
memory/2100-0-0x00000000748C0000-0x0000000075070000-memory.dmp

Filesize
7.7MB

Download
memory/5020-15-0x0000000074820000-0x0000000074FD0000-memory.dmp

Filesize
7.7MB

Download
memory/5020-16-0x0000000074820000-0x0000000074FD0000-memory.dmp

Filesize
7.7MB

Download
memory/5020-17-0x0000000005760000-0x0000000005770000-memory.dmp

Filesize
64KB

Download
memory/5020-18-0x0000000005760000-0x0000000005770000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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