asyncrat | ba4ffe8c2d64162b9f149242ecb7309a35886d05f5360da9e3e91a261a68c2ae

General

Target

Copy.exe
Size

1.1MB
MD5

520ba96d18722d0d6dcc2f0250d52998
SHA1

b2db2f9fa0fd3a2c74ef0b10dc684737eac9f3d9
SHA256

ba4ffe8c2d64162b9f149242ecb7309a35886d05f5360da9e3e91a261a68c2ae
SHA512

44510d3088c495e49c0f3c71defaf7b244146424413a6432ed2f424b9f965b762683d497b697ab240eb10dead17de77c7abd1cd38727e92762ccae4aff444977
SSDEEP

24576:Ca+L5JM0ZZN8uX7QHUEjrgVo+ETCmqba0W+Tuu4gmmRt1ZGj:X+hjrX7Q0Ej4on23nTuu4gXR5G

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

C2

asyncgeneration1.duckdns.org:4404

Mutex

AsyncMutex_6SI8OkPnk

Attributes

delay
3
install
false
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 5 IoCs

rat

Processes:

resource	yara_rule
behavioral1/memory/1776-75-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat
behavioral1/memory/1776-76-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat
behavioral1/memory/1776-78-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat
behavioral1/memory/1776-80-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat
behavioral1/memory/1776-82-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat

Suspicious use of SetThreadContext 1 IoCs

Processes:

Copy.exe

description pid process target process

PID 1048 set thread context of 1776 1048 Copy.exe Copy.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

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
T1053

Processes:

schtasks.exe

pid process

1728 schtasks.exe
Suspicious behavior: EnumeratesProcesses 5 IoCs

Processes:

Copy.exepowershell.exepowershell.exe

pid process

1048 Copy.exe
1048 Copy.exe
1048 Copy.exe
1688 powershell.exe
1620 powershell.exe

description	pid	process	target process
PID 1048 set thread context of 1776	1048	Copy.exe	Copy.exe

pid	process
1728	schtasks.exe

pid	process
1048	Copy.exe
1048	Copy.exe
1048	Copy.exe
1688	powershell.exe
1620	powershell.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes:

Copy.exepowershell.exepowershell.exeCopy.exe

description	pid	process
Token: SeDebugPrivilege	1048	Copy.exe
Token: SeDebugPrivilege	1688	powershell.exe
Token: SeDebugPrivilege	1620	powershell.exe
Token: SeDebugPrivilege	1776	Copy.exe

Suspicious use of WriteProcessMemory 21 IoCs

Processes:

Copy.exe

description	pid	process	target process
PID 1048 wrote to memory of 1688	1048	Copy.exe	powershell.exe
PID 1048 wrote to memory of 1688	1048	Copy.exe	powershell.exe
PID 1048 wrote to memory of 1688	1048	Copy.exe	powershell.exe
PID 1048 wrote to memory of 1688	1048	Copy.exe	powershell.exe
PID 1048 wrote to memory of 1620	1048	Copy.exe	powershell.exe
PID 1048 wrote to memory of 1620	1048	Copy.exe	powershell.exe
PID 1048 wrote to memory of 1620	1048	Copy.exe	powershell.exe
PID 1048 wrote to memory of 1620	1048	Copy.exe	powershell.exe
PID 1048 wrote to memory of 1728	1048	Copy.exe	schtasks.exe
PID 1048 wrote to memory of 1728	1048	Copy.exe	schtasks.exe
PID 1048 wrote to memory of 1728	1048	Copy.exe	schtasks.exe
PID 1048 wrote to memory of 1728	1048	Copy.exe	schtasks.exe
PID 1048 wrote to memory of 1776	1048	Copy.exe	Copy.exe
PID 1048 wrote to memory of 1776	1048	Copy.exe	Copy.exe
PID 1048 wrote to memory of 1776	1048	Copy.exe	Copy.exe
PID 1048 wrote to memory of 1776	1048	Copy.exe	Copy.exe
PID 1048 wrote to memory of 1776	1048	Copy.exe	Copy.exe
PID 1048 wrote to memory of 1776	1048	Copy.exe	Copy.exe
PID 1048 wrote to memory of 1776	1048	Copy.exe	Copy.exe
PID 1048 wrote to memory of 1776	1048	Copy.exe	Copy.exe
PID 1048 wrote to memory of 1776	1048	Copy.exe	Copy.exe

C:\Users\Admin\AppData\Local\Temp\Copy.exe
"C:\Users\Admin\AppData\Local\Temp\Copy.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1048

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\Copy.exe"
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1688

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\yXBzlrEBvIU.exe"
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1620

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\yXBzlrEBvIU" /XML "C:\Users\Admin\AppData\Local\Temp\tmp2943.tmp"
2⤵
- Creates scheduled task(s)
PID:1728

C:\Users\Admin\AppData\Local\Temp\Copy.exe
"C:\Users\Admin\AppData\Local\Temp\Copy.exe"
2⤵
- Suspicious use of AdjustPrivilegeToken
PID:1776

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp2943.tmp
Filesize
1KB

MD5
f3e9fcab2337eabdba3a788cc71cea23

SHA1
7b0fe48846aafbffc248a8147674f605560c624c

SHA256
277093e35ec5f8288dff645730af67d4d2e83cdfe64c76aab9c02f6166bfff3f

SHA512
d9f4e13349aea8ec1bec2a0a8db1e7598c5a45fba753e21dd91acc304a4979782e1931b1b4430b33612b9fdd42e5c9006aa0ea2d364f66b1466d2b5a2c851a4c

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\H0Z0ILRYZY46UTT9Z02S.temp
Filesize
7KB

MD5
d8b9438286f71b1a4c94c3ce32bedb96

SHA1
6a138331df9a6f0199921160ef457ef54f30a6ef

SHA256
d4879d3a78b680d67e315d3497163917c275b2d0b24cfbeacaf664f94d5f400a

SHA512
d189c9704141697a75906819c7f54716b760a83aa8906f214bd5b0a006fb0d1cf299d0dec6fddd8b2a50d11d9e835d2aa6fca29f62563a1daaffdb91ffa6e170

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\d93f411851d7c929.customDestinations-ms
Filesize
7KB

MD5
d8b9438286f71b1a4c94c3ce32bedb96

SHA1
6a138331df9a6f0199921160ef457ef54f30a6ef

SHA256
d4879d3a78b680d67e315d3497163917c275b2d0b24cfbeacaf664f94d5f400a

SHA512
d189c9704141697a75906819c7f54716b760a83aa8906f214bd5b0a006fb0d1cf299d0dec6fddd8b2a50d11d9e835d2aa6fca29f62563a1daaffdb91ffa6e170

Download Submit
memory/1048-55-0x0000000004CF0000-0x0000000004D30000-memory.dmp

Filesize
256KB

Download
memory/1048-56-0x0000000000250000-0x000000000026C000-memory.dmp

Filesize
112KB

Download
memory/1048-57-0x0000000004CF0000-0x0000000004D30000-memory.dmp

Filesize
256KB

Download
memory/1048-58-0x0000000000420000-0x000000000042C000-memory.dmp

Filesize
48KB

Download
memory/1048-59-0x0000000007C50000-0x0000000007D34000-memory.dmp

Filesize
912KB

Download
memory/1048-72-0x0000000000380000-0x00000000003EC000-memory.dmp

Filesize
432KB

Download
memory/1048-54-0x0000000000BD0000-0x0000000000CF4000-memory.dmp

Filesize
1.1MB

Download
memory/1620-83-0x00000000027B0000-0x00000000027F0000-memory.dmp

Filesize
256KB

Download
memory/1688-84-0x00000000025F0000-0x0000000002630000-memory.dmp

Filesize
256KB

Download
memory/1776-73-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/1776-76-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/1776-77-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/1776-78-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/1776-80-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/1776-82-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/1776-75-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/1776-74-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/1776-85-0x0000000004DC0000-0x0000000004E00000-memory.dmp

Filesize
256KB

Download
memory/1776-103-0x0000000004DC0000-0x0000000004E00000-memory.dmp

Filesize
256KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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