asyncrat | 804fb0f9b639fb03310d7cb96b74172d7dca3edcb1fc94b8caaa7cdad6d81e49

General

Target

msdtc.exe
Size

47KB
MD5

2731a98129622a67a970a173dda353ef
SHA1

4a705cfafbf7b1b543612203d09b16445a34887f
SHA256

804fb0f9b639fb03310d7cb96b74172d7dca3edcb1fc94b8caaa7cdad6d81e49
SHA512

0b471cac88b99408f9c653bf4feb0947e944c466b55931881790b64fcd6606b42e2960687208f0a7ea3d10b1df3c18cc51fdf8f6f197acdc4df1f293b28cf0fd
SSDEEP

768:8uX9m9T3YkeaWUMneAmo2qhtrKerR2L17BPIpvRIAe/o0b74e09w8Q1/znXTBDZl:8uX9m9T3Pg2ApXpvRO/Db7G9JQjdw+

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

87.120.113.125:6606

87.120.113.125:7707

87.120.113.125:8808

Mutex

NnE2Recf2msF

Attributes

delay
3
install
true
install_file
dwmm.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
behavioral1/files/0x0008000000012102-13.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
2708	dwmm.exe

Loads dropped DLL 1 IoCs

pid	Process
2284	cmd.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	msdtc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	dwmm.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2772	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
2080	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2508	msdtc.exe
2508	msdtc.exe
2508	msdtc.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2508	msdtc.exe
Token: SeDebugPrivilege	2708	dwmm.exe
Token: SeDebugPrivilege	2708	dwmm.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 2508 wrote to memory of 2852	2508	msdtc.exe	31
PID 2508 wrote to memory of 2852	2508	msdtc.exe	31
PID 2508 wrote to memory of 2852	2508	msdtc.exe	31
PID 2508 wrote to memory of 2852	2508	msdtc.exe	31
PID 2508 wrote to memory of 2284	2508	msdtc.exe	33
PID 2508 wrote to memory of 2284	2508	msdtc.exe	33
PID 2508 wrote to memory of 2284	2508	msdtc.exe	33
PID 2508 wrote to memory of 2284	2508	msdtc.exe	33
PID 2852 wrote to memory of 2080	2852	cmd.exe	35
PID 2852 wrote to memory of 2080	2852	cmd.exe	35
PID 2852 wrote to memory of 2080	2852	cmd.exe	35
PID 2852 wrote to memory of 2080	2852	cmd.exe	35
PID 2284 wrote to memory of 2772	2284	cmd.exe	36
PID 2284 wrote to memory of 2772	2284	cmd.exe	36
PID 2284 wrote to memory of 2772	2284	cmd.exe	36
PID 2284 wrote to memory of 2772	2284	cmd.exe	36
PID 2284 wrote to memory of 2708	2284	cmd.exe	37
PID 2284 wrote to memory of 2708	2284	cmd.exe	37
PID 2284 wrote to memory of 2708	2284	cmd.exe	37
PID 2284 wrote to memory of 2708	2284	cmd.exe	37

C:\Users\Admin\AppData\Local\Temp\msdtc.exe
"C:\Users\Admin\AppData\Local\Temp\msdtc.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2508
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "dwmm" /tr '"C:\Users\Admin\AppData\Roaming\dwmm.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2852
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "dwmm" /tr '"C:\Users\Admin\AppData\Roaming\dwmm.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2080
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpB7BB.tmp.bat""
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2284
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:2772
- - C:\Users\Admin\AppData\Roaming\dwmm.exe
    "C:\Users\Admin\AppData\Roaming\dwmm.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:2708

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\tmpB7BB.tmp.bat

Filesize
148B

MD5
c163e8223bd1a35455211c65c0b4c391

SHA1
889866d3c2384a5d98092df2191ce3105499a27d

SHA256
12314fd3b5a0a07115302ba264079e5c1ac44eccf015289b87baffb7c12e28aa

SHA512
ad9a134b394b21111aca7c9a8af7729c1235be1a7a85337c24b4ab88a60becfabe32cff8a27ceec9d53f54273a29f0e28d5ef7fa4201e4275ec06210d280c2db

Download Submit
\Users\Admin\AppData\Roaming\dwmm.exe

Filesize
47KB

MD5
2731a98129622a67a970a173dda353ef

SHA1
4a705cfafbf7b1b543612203d09b16445a34887f

SHA256
804fb0f9b639fb03310d7cb96b74172d7dca3edcb1fc94b8caaa7cdad6d81e49

SHA512
0b471cac88b99408f9c653bf4feb0947e944c466b55931881790b64fcd6606b42e2960687208f0a7ea3d10b1df3c18cc51fdf8f6f197acdc4df1f293b28cf0fd

Download Submit
memory/2508-0-0x000000007411E000-0x000000007411F000-memory.dmp

Filesize
4KB

Download
memory/2508-1-0x0000000000C00000-0x0000000000C12000-memory.dmp

Filesize
72KB

Download
memory/2508-2-0x0000000074110000-0x00000000747FE000-memory.dmp

Filesize
6.9MB

Download
memory/2508-11-0x0000000074110000-0x00000000747FE000-memory.dmp

Filesize
6.9MB

Download
memory/2708-16-0x0000000000370000-0x0000000000382000-memory.dmp

Filesize
72KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads