asyncrat | b1c2d42876dbd40a3cbce84cd5e4e44b76c2e35c7618f9c831416d6442667d33

General

Target

arf.exe
Size

63KB
MD5

f69a0edbc9c44a09ed18e5a501b6621b
SHA1

7b835c5a70749c3e33c338943344ae65fe6d7aaf
SHA256

b1c2d42876dbd40a3cbce84cd5e4e44b76c2e35c7618f9c831416d6442667d33
SHA512

a8067e96218406d1afa94c827d630b5835374db71c794d6de0f6a75756935cc4b2ee74bb72f9ac2034a6d8ccab81a503aeca01b6fad76b17a59ed4ebd1703644
SSDEEP

1536:diDBlKWYEk2KwYjGbbKwg9z+aGtZVclN:dmlKWYEb6GbbK5VizY

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Version

1.0.7

Botnet

Default

C2

roarwasd12312-34767.portmap.host:8848

roarwasd12312-34767.portmap.host:34767

Mutex

roaroaroaraoroaroaraoraoraoarororrohrorororoaroaaoaoaoaroaroar

Attributes

delay
1
install
true
install_file
windows defender firewall.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

resource	yara_rule
behavioral2/files/0x000b000000023b86-11.dat	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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\Control Panel\International\Geo\Nation	arf.exe

Executes dropped EXE 1 IoCs

pid	Process
1992	windows defender firewall.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

pid	Process
1040	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

pid	Process
3480	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
2256	arf.exe
2256	arf.exe
2256	arf.exe
2256	arf.exe
2256	arf.exe
2256	arf.exe
2256	arf.exe
2256	arf.exe
2256	arf.exe
2256	arf.exe
2256	arf.exe
2256	arf.exe
2256	arf.exe
2256	arf.exe
2256	arf.exe
2256	arf.exe
2256	arf.exe
2256	arf.exe
2256	arf.exe
2256	arf.exe
2256	arf.exe
2256	arf.exe
2256	arf.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2256	arf.exe
Token: SeDebugPrivilege	1992	windows defender firewall.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 2256 wrote to memory of 1632	2256	arf.exe	82
PID 2256 wrote to memory of 1632	2256	arf.exe	82
PID 2256 wrote to memory of 2904	2256	arf.exe	84
PID 2256 wrote to memory of 2904	2256	arf.exe	84
PID 2904 wrote to memory of 1040	2904	cmd.exe	86
PID 2904 wrote to memory of 1040	2904	cmd.exe	86
PID 1632 wrote to memory of 3480	1632	cmd.exe	87
PID 1632 wrote to memory of 3480	1632	cmd.exe	87
PID 2904 wrote to memory of 1992	2904	cmd.exe	92
PID 2904 wrote to memory of 1992	2904	cmd.exe	92

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\arf.exe
"C:\Users\Admin\AppData\Local\Temp\arf.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2256
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "windows defender firewall" /tr '"C:\Users\Admin\AppData\Roaming\windows defender firewall.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1632
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "windows defender firewall" /tr '"C:\Users\Admin\AppData\Roaming\windows defender firewall.exe"'
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:3480
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp96F0.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2904
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:1040
- - C:\Users\Admin\AppData\Roaming\windows defender firewall.exe
    "C:\Users\Admin\AppData\Roaming\windows defender firewall.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:1992

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\tmp96F0.tmp.bat

Filesize
169B

MD5
650273813e8691942ec8b861a6fcf840

SHA1
882c8390ea5de37b901640f3fca7960e1ab942da

SHA256
58878c9ce0e855046c003b0a7c2a1106b901517457a5a553d24d8b7afd227a19

SHA512
2cf7148fbb33701edf39da84f7dad2a0a4151534f8e6dc9837d438886c0215cf5a552d88131aafab653fa4b5e49c2777a68eafa20b6909ffa0e3f1286d40568c

Download Submit
C:\Users\Admin\AppData\Roaming\windows defender firewall.exe

Filesize
63KB

MD5
f69a0edbc9c44a09ed18e5a501b6621b

SHA1
7b835c5a70749c3e33c338943344ae65fe6d7aaf

SHA256
b1c2d42876dbd40a3cbce84cd5e4e44b76c2e35c7618f9c831416d6442667d33

SHA512
a8067e96218406d1afa94c827d630b5835374db71c794d6de0f6a75756935cc4b2ee74bb72f9ac2034a6d8ccab81a503aeca01b6fad76b17a59ed4ebd1703644

Download Submit
memory/2256-0-0x00007FFCE6AF3000-0x00007FFCE6AF5000-memory.dmp

Filesize
8KB

Download
memory/2256-1-0x0000000000040000-0x0000000000056000-memory.dmp

Filesize
88KB

Download
memory/2256-2-0x00007FFCE6AF0000-0x00007FFCE75B1000-memory.dmp

Filesize
10.8MB

Download
memory/2256-7-0x00007FFCE6AF0000-0x00007FFCE75B1000-memory.dmp

Filesize
10.8MB

Download
memory/2256-8-0x00007FFCE6AF0000-0x00007FFCE75B1000-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