asyncrat | e6d47f48a0ce335565ab3f98b7fcea9b3078e0c8a100f9b85f5c1dd8e5c61647

General

Target

System.exe
Size

47KB
MD5

b54a96fc6a2c782fe559ab2a5a6c926f
SHA1

48ba8ab74fe7e669ef28304852728466b92998c3
SHA256

e6d47f48a0ce335565ab3f98b7fcea9b3078e0c8a100f9b85f5c1dd8e5c61647
SHA512

67a3c71c9ddb6eab42086f5881a2473832762f742cfe5f465a719d4cf69334629ff81797a5a438e74f12abbfd7850c15621919ac7babf3d7b3a357ca86c7531f
SSDEEP

768:8uMBi+TDlxOZvWUjwF8ONmo2qztSZ716XtFOtmY8/LQfPImB1sgV0b66OMUEjKK+:8uMB1TDlssF72B71SO8K4mBGVb66ujak

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

newstartagain.servequake.com:6606

newstartagain.servequake.com:7707

newstartagain.servequake.com:8808

newstartagain50.duckdns.org:6606

newstartagain50.duckdns.org:7707

newstartagain50.duckdns.org:8808

Mutex

Fm255Mv55doc

Attributes

delay
3
install
true
install_file
System.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 1 IoCs

rat

resource	yara_rule
behavioral1/files/0x0009000000023458-11.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-1-5-21-1176886754-713327781-2233697964-1000\Control Panel\International\Geo\Nation	System.exe

Executes dropped EXE 1 IoCs

pid	Process
4316	System.exe

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

System Information Discovery
T1082

Checks SCSI registry key(s) 3 TTPs 3 IoCs

SCSI information is often read in order to detect sandboxing environments.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_DADY&Prod_HARDDISK\4&215468a5&0&000000\Properties\{b725f130-47ef-101a-a5f1-02608c9eebac}\000A	taskmgr.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_DADY&Prod_HARDDISK\4&215468a5&0&000000\FriendlyName	taskmgr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_DADY&Prod_HARDDISK\4&215468a5&0&000000	taskmgr.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
3276	timeout.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-1176886754-713327781-2233697964-1000_Classes\Local Settings	taskmgr.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
1224	schtasks.exe

Suspicious behavior: EnumeratesProcesses 45 IoCs

pid	Process
3388	System.exe
3388	System.exe
3388	System.exe
3388	System.exe
3388	System.exe
3388	System.exe
3388	System.exe
3388	System.exe
3388	System.exe
3388	System.exe
3388	System.exe
3388	System.exe
3388	System.exe
3388	System.exe
3388	System.exe
3388	System.exe
3388	System.exe
3388	System.exe
3388	System.exe
3388	System.exe
3388	System.exe
3572	taskmgr.exe
3572	taskmgr.exe
3572	taskmgr.exe
3572	taskmgr.exe
3572	taskmgr.exe
3572	taskmgr.exe
3572	taskmgr.exe
3572	taskmgr.exe
3572	taskmgr.exe
3572	taskmgr.exe
3572	taskmgr.exe
3572	taskmgr.exe
3572	taskmgr.exe
3572	taskmgr.exe
3572	taskmgr.exe
3572	taskmgr.exe
3572	taskmgr.exe
3572	taskmgr.exe
3572	taskmgr.exe
3572	taskmgr.exe
3572	taskmgr.exe
3572	taskmgr.exe
3572	taskmgr.exe
3572	taskmgr.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	3388	System.exe
Token: SeDebugPrivilege	3572	taskmgr.exe
Token: SeSystemProfilePrivilege	3572	taskmgr.exe
Token: SeCreateGlobalPrivilege	3572	taskmgr.exe
Token: SeDebugPrivilege	4316	System.exe

Suspicious use of FindShellTrayWindow 36 IoCs

pid	Process
3572	taskmgr.exe
3572	taskmgr.exe
3572	taskmgr.exe
3572	taskmgr.exe
3572	taskmgr.exe
3572	taskmgr.exe
3572	taskmgr.exe
3572	taskmgr.exe
3572	taskmgr.exe
3572	taskmgr.exe
3572	taskmgr.exe
3572	taskmgr.exe
3572	taskmgr.exe
3572	taskmgr.exe
3572	taskmgr.exe
3572	taskmgr.exe
3572	taskmgr.exe
3572	taskmgr.exe
3572	taskmgr.exe
3572	taskmgr.exe
3572	taskmgr.exe
3572	taskmgr.exe
3572	taskmgr.exe
3572	taskmgr.exe
3572	taskmgr.exe
3572	taskmgr.exe
3572	taskmgr.exe
3572	taskmgr.exe
3572	taskmgr.exe
3572	taskmgr.exe
3572	taskmgr.exe
3572	taskmgr.exe
3572	taskmgr.exe
3572	taskmgr.exe
3572	taskmgr.exe
3572	taskmgr.exe

Suspicious use of SendNotifyMessage 36 IoCs

pid	Process
3572	taskmgr.exe
3572	taskmgr.exe
3572	taskmgr.exe
3572	taskmgr.exe
3572	taskmgr.exe
3572	taskmgr.exe
3572	taskmgr.exe
3572	taskmgr.exe
3572	taskmgr.exe
3572	taskmgr.exe
3572	taskmgr.exe
3572	taskmgr.exe
3572	taskmgr.exe
3572	taskmgr.exe
3572	taskmgr.exe
3572	taskmgr.exe
3572	taskmgr.exe
3572	taskmgr.exe
3572	taskmgr.exe
3572	taskmgr.exe
3572	taskmgr.exe
3572	taskmgr.exe
3572	taskmgr.exe
3572	taskmgr.exe
3572	taskmgr.exe
3572	taskmgr.exe
3572	taskmgr.exe
3572	taskmgr.exe
3572	taskmgr.exe
3572	taskmgr.exe
3572	taskmgr.exe
3572	taskmgr.exe
3572	taskmgr.exe
3572	taskmgr.exe
3572	taskmgr.exe
3572	taskmgr.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 3388 wrote to memory of 736	3388	System.exe	86
PID 3388 wrote to memory of 736	3388	System.exe	86
PID 3388 wrote to memory of 736	3388	System.exe	86
PID 3388 wrote to memory of 4504	3388	System.exe	88
PID 3388 wrote to memory of 4504	3388	System.exe	88
PID 3388 wrote to memory of 4504	3388	System.exe	88
PID 4504 wrote to memory of 3276	4504	cmd.exe	90
PID 4504 wrote to memory of 3276	4504	cmd.exe	90
PID 4504 wrote to memory of 3276	4504	cmd.exe	90
PID 736 wrote to memory of 1224	736	cmd.exe	91
PID 736 wrote to memory of 1224	736	cmd.exe	91
PID 736 wrote to memory of 1224	736	cmd.exe	91
PID 4504 wrote to memory of 4316	4504	cmd.exe	94
PID 4504 wrote to memory of 4316	4504	cmd.exe	94
PID 4504 wrote to memory of 4316	4504	cmd.exe	94

C:\Users\Admin\AppData\Local\Temp\System.exe
"C:\Users\Admin\AppData\Local\Temp\System.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3388
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "System" /tr '"C:\Users\Admin\AppData\Roaming\System.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:736
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "System" /tr '"C:\Users\Admin\AppData\Roaming\System.exe"'
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:1224
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpD179.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4504
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:3276
- - C:\Users\Admin\AppData\Roaming\System.exe
    "C:\Users\Admin\AppData\Roaming\System.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:4316

C:\Windows\system32\taskmgr.exe
"C:\Windows\system32\taskmgr.exe" /4
1⤵
- Checks SCSI registry key(s)
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
PID:3572

C:\Windows\System32\rundll32.exe
C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
1⤵
PID:800

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

Peripheral Device Discovery

Query Registry

System Information Discovery

3

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\System.exe.log

Filesize
522B

MD5
acc9090417037dfa2a55b46ed86e32b8

SHA1
53fa6fb25fb3e88c24d2027aca6ae492b2800a4d

SHA256
2412679218bb0a7d05ceee32869bbb223619bde9966c4c460a68304a3367724b

SHA512
d51f7085ec147c708f446b9fb6923cd2fb64596d354ed929e125b30ace57c8cb3217589447a36960e5d3aea87a4e48aaa82c7509eced6d6c2cecd71fcfe3697b

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpD179.tmp.bat

Filesize
150B

MD5
32602092c66ec1d07b5fbd121f03161b

SHA1
dc1321c4d135f1964f2d465bb2184923c4fdb115

SHA256
035932a982a01a8bb6badfce363130ae65ff661deb40ca8fd11039419b707680

SHA512
f40319875dc1477b4e757f2fd84c4e4af930360d3a31534629a2b05d6a65c2ed8baf549e293134d6b11de011e326c6ba9e721e12e9ed9bec0ae402eb994657c7

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

Filesize
47KB

MD5
b54a96fc6a2c782fe559ab2a5a6c926f

SHA1
48ba8ab74fe7e669ef28304852728466b92998c3

SHA256
e6d47f48a0ce335565ab3f98b7fcea9b3078e0c8a100f9b85f5c1dd8e5c61647

SHA512
67a3c71c9ddb6eab42086f5881a2473832762f742cfe5f465a719d4cf69334629ff81797a5a438e74f12abbfd7850c15621919ac7babf3d7b3a357ca86c7531f

Download Submit
memory/3388-0-0x00000000744AE000-0x00000000744AF000-memory.dmp

Filesize
4KB

Download
memory/3388-1-0x00000000008E0000-0x00000000008F2000-memory.dmp

Filesize
72KB

Download
memory/3388-2-0x00000000744A0000-0x0000000074C50000-memory.dmp

Filesize
7.7MB

Download
memory/3388-3-0x00000000053B0000-0x000000000544C000-memory.dmp

Filesize
624KB

Download
memory/3388-8-0x00000000744A0000-0x0000000074C50000-memory.dmp

Filesize
7.7MB

Download
memory/3572-14-0x0000020C39D00000-0x0000020C39D01000-memory.dmp

Filesize
4KB

Download
memory/3572-12-0x0000020C39D00000-0x0000020C39D01000-memory.dmp

Filesize
4KB

Download
memory/3572-15-0x0000020C39D00000-0x0000020C39D01000-memory.dmp

Filesize
4KB

Download
memory/3572-22-0x0000020C39D00000-0x0000020C39D01000-memory.dmp

Filesize
4KB

Download
memory/3572-26-0x0000020C39D00000-0x0000020C39D01000-memory.dmp

Filesize
4KB

Download
memory/3572-25-0x0000020C39D00000-0x0000020C39D01000-memory.dmp

Filesize
4KB

Download
memory/3572-24-0x0000020C39D00000-0x0000020C39D01000-memory.dmp

Filesize
4KB

Download
memory/3572-23-0x0000020C39D00000-0x0000020C39D01000-memory.dmp

Filesize
4KB

Download
memory/3572-21-0x0000020C39D00000-0x0000020C39D01000-memory.dmp

Filesize
4KB

Download
memory/3572-20-0x0000020C39D00000-0x0000020C39D01000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads