asyncrat | e87744178fba28b505eccbf4847a77f84877a8bd8f50ce17f5f6f68a0ea41327

General

Target

bro.exe
Size

47KB
MD5

83fc5776b79aad95fecd322f11f80187
SHA1

412ccb9ab9e743907eef7be3b47568decefbd15f
SHA256

e87744178fba28b505eccbf4847a77f84877a8bd8f50ce17f5f6f68a0ea41327
SHA512

1552e626f349c66f7e555326e68d97aa87a4971b6c4b912514f1bfa39036d17c9295e88e0f49c349cac2758974e060535044ea4d09a25f2949f45ab79f0c838b
SSDEEP

768:MuY69T3kH1jWUvTqRmo2qbRc4wmDPItjd0axq0bE6zrvtOoqJ/UBDZ0x:MuY69T34y2AwmMtjZHbE6/vgMd0x

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

desktop-ukmnq5d-wasda.at.remote.it:33006

Mutex

tTT9mCTiJnq9

Attributes

delay
3
install
true
install_file
roar.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/0x001f00000002aabb-11.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
2032	roar.exe

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 6 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	roar.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	bro.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
980	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
2804	schtasks.exe

Suspicious behavior: EnumeratesProcesses 17 IoCs

pid	Process
2068	bro.exe
2068	bro.exe
2068	bro.exe
2068	bro.exe
2068	bro.exe
2068	bro.exe
2068	bro.exe
2068	bro.exe
2068	bro.exe
2068	bro.exe
2068	bro.exe
2068	bro.exe
2068	bro.exe
2068	bro.exe
2068	bro.exe
2068	bro.exe
2068	bro.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2068	bro.exe
Token: SeDebugPrivilege	2032	roar.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2068 wrote to memory of 956	2068	bro.exe	77
PID 2068 wrote to memory of 956	2068	bro.exe	77
PID 2068 wrote to memory of 956	2068	bro.exe	77
PID 2068 wrote to memory of 4076	2068	bro.exe	79
PID 2068 wrote to memory of 4076	2068	bro.exe	79
PID 2068 wrote to memory of 4076	2068	bro.exe	79
PID 956 wrote to memory of 2804	956	cmd.exe	81
PID 956 wrote to memory of 2804	956	cmd.exe	81
PID 956 wrote to memory of 2804	956	cmd.exe	81
PID 4076 wrote to memory of 980	4076	cmd.exe	82
PID 4076 wrote to memory of 980	4076	cmd.exe	82
PID 4076 wrote to memory of 980	4076	cmd.exe	82
PID 4076 wrote to memory of 2032	4076	cmd.exe	83
PID 4076 wrote to memory of 2032	4076	cmd.exe	83
PID 4076 wrote to memory of 2032	4076	cmd.exe	83

C:\Users\Admin\AppData\Local\Temp\bro.exe
"C:\Users\Admin\AppData\Local\Temp\bro.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2068
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "roar" /tr '"C:\Users\Admin\AppData\Roaming\roar.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:956
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "roar" /tr '"C:\Users\Admin\AppData\Roaming\roar.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2804
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpB621.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4076
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:980
- - C:\Users\Admin\AppData\Roaming\roar.exe
    "C:\Users\Admin\AppData\Roaming\roar.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:2032

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

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmpB621.tmp.bat

Filesize
148B

MD5
e4308a4bc24b07e0e26e6f5f3d5f63e3

SHA1
b7d595b791804aa6a57087fa83a9b9335f338de1

SHA256
982555f42ea798bec99991e551f4c649a3d65b3de8c0e0ab435854eb6a662dbf

SHA512
6cdc773232e7c62d6bbed4be80d6fe3118c40668c4b434f85540c9a885511f1bc099ed79b712b9c63ca98314c8ee56a57ce85e92339bba0ec080676431b8b82f

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

Filesize
47KB

MD5
83fc5776b79aad95fecd322f11f80187

SHA1
412ccb9ab9e743907eef7be3b47568decefbd15f

SHA256
e87744178fba28b505eccbf4847a77f84877a8bd8f50ce17f5f6f68a0ea41327

SHA512
1552e626f349c66f7e555326e68d97aa87a4971b6c4b912514f1bfa39036d17c9295e88e0f49c349cac2758974e060535044ea4d09a25f2949f45ab79f0c838b

Download Submit
memory/2032-13-0x0000000075190000-0x0000000075941000-memory.dmp

Filesize
7.7MB

Download
memory/2032-14-0x0000000075190000-0x0000000075941000-memory.dmp

Filesize
7.7MB

Download
memory/2068-0-0x000000007519E000-0x000000007519F000-memory.dmp

Filesize
4KB

Download
memory/2068-1-0x0000000000480000-0x0000000000492000-memory.dmp

Filesize
72KB

Download
memory/2068-2-0x0000000075190000-0x0000000075941000-memory.dmp

Filesize
7.7MB

Download
memory/2068-3-0x0000000004E50000-0x0000000004EEC000-memory.dmp

Filesize
624KB

Download
memory/2068-8-0x0000000075190000-0x0000000075941000-memory.dmp

Filesize
7.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads