asyncrat | e850d01470445c2d1aeea4694ef6ca85e8417a5fdd867da5750d24d3e14e0834

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 7 IoCs

rat

Processes:

resource	yara_rule
behavioral1/memory/1824-75-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat
behavioral1/memory/1824-76-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat
behavioral1/memory/1824-78-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat
behavioral1/memory/1824-80-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat
behavioral1/memory/1824-82-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat
behavioral1/memory/580-83-0x0000000002790000-0x00000000027D0000-memory.dmp	asyncrat
behavioral1/memory/1824-86-0x00000000004B0000-0x00000000004F0000-memory.dmp	asyncrat

Suspicious use of SetThreadContext 1 IoCs

Processes:

COPY.exe

description pid process target process

PID 1100 set thread context of 1824 1100 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

1744 schtasks.exe
Suspicious behavior: EnumeratesProcesses 5 IoCs

Processes:

COPY.exepowershell.exepowershell.exe

pid process

1100 COPY.exe
1100 COPY.exe
1100 COPY.exe
580 powershell.exe
368 powershell.exe

description	pid	process	target process
PID 1100 set thread context of 1824	1100	COPY.exe	COPY.exe

pid	process
1744	schtasks.exe

pid	process
1100	COPY.exe
1100	COPY.exe
1100	COPY.exe
580	powershell.exe
368	powershell.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes:

COPY.exepowershell.exepowershell.exeCOPY.exe

description	pid	process
Token: SeDebugPrivilege	1100	COPY.exe
Token: SeDebugPrivilege	580	powershell.exe
Token: SeDebugPrivilege	368	powershell.exe
Token: SeDebugPrivilege	1824	COPY.exe

Suspicious use of WriteProcessMemory 21 IoCs

Processes:

COPY.exe

description	pid	process	target process
PID 1100 wrote to memory of 368	1100	COPY.exe	powershell.exe
PID 1100 wrote to memory of 368	1100	COPY.exe	powershell.exe
PID 1100 wrote to memory of 368	1100	COPY.exe	powershell.exe
PID 1100 wrote to memory of 368	1100	COPY.exe	powershell.exe
PID 1100 wrote to memory of 580	1100	COPY.exe	powershell.exe
PID 1100 wrote to memory of 580	1100	COPY.exe	powershell.exe
PID 1100 wrote to memory of 580	1100	COPY.exe	powershell.exe
PID 1100 wrote to memory of 580	1100	COPY.exe	powershell.exe
PID 1100 wrote to memory of 1744	1100	COPY.exe	schtasks.exe
PID 1100 wrote to memory of 1744	1100	COPY.exe	schtasks.exe
PID 1100 wrote to memory of 1744	1100	COPY.exe	schtasks.exe
PID 1100 wrote to memory of 1744	1100	COPY.exe	schtasks.exe
PID 1100 wrote to memory of 1824	1100	COPY.exe	COPY.exe
PID 1100 wrote to memory of 1824	1100	COPY.exe	COPY.exe
PID 1100 wrote to memory of 1824	1100	COPY.exe	COPY.exe
PID 1100 wrote to memory of 1824	1100	COPY.exe	COPY.exe
PID 1100 wrote to memory of 1824	1100	COPY.exe	COPY.exe
PID 1100 wrote to memory of 1824	1100	COPY.exe	COPY.exe
PID 1100 wrote to memory of 1824	1100	COPY.exe	COPY.exe
PID 1100 wrote to memory of 1824	1100	COPY.exe	COPY.exe
PID 1100 wrote to memory of 1824	1100	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:1100

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:368

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:580

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\yXBzlrEBvIU" /XML "C:\Users\Admin\AppData\Local\Temp\tmpC12E.tmp"
2⤵
- Creates scheduled task(s)
PID:1744

C:\Users\Admin\AppData\Local\Temp\COPY.exe
"C:\Users\Admin\AppData\Local\Temp\COPY.exe"
2⤵
- Suspicious use of AdjustPrivilegeToken
PID:1824

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\tmpC12E.tmp
Filesize
1KB

MD5
f3e9fcab2337eabdba3a788cc71cea23

SHA1
7b0fe48846aafbffc248a8147674f605560c624c

SHA256
277093e35ec5f8288dff645730af67d4d2e83cdfe64c76aab9c02f6166bfff3f

SHA512
d9f4e13349aea8ec1bec2a0a8db1e7598c5a45fba753e21dd91acc304a4979782e1931b1b4430b33612b9fdd42e5c9006aa0ea2d364f66b1466d2b5a2c851a4c

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\GK24EERSB665UG67XAF2.temp
Filesize
7KB

MD5
ad3dad968396ba67077971625a8980dd

SHA1
e5797864c5446908d5c91b25d1bcb91d95c71c0c

SHA256
6a5fe8667bf4e31523d824b05427111252166c8ab60f775d8dfcfeef4cc051b5

SHA512
74f830af2dd9e090e8d5f4aebe3e8087e36ef231f856c03b8d7c743a0795bd25fc7eecdadf4f93e3d8a5b374377c6579cef101ea4e1800032dcfbc916985463b

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

MD5
ad3dad968396ba67077971625a8980dd

SHA1
e5797864c5446908d5c91b25d1bcb91d95c71c0c

SHA256
6a5fe8667bf4e31523d824b05427111252166c8ab60f775d8dfcfeef4cc051b5

SHA512
74f830af2dd9e090e8d5f4aebe3e8087e36ef231f856c03b8d7c743a0795bd25fc7eecdadf4f93e3d8a5b374377c6579cef101ea4e1800032dcfbc916985463b

Download Submit
memory/368-84-0x0000000002650000-0x0000000002690000-memory.dmp

Filesize
256KB

Download
memory/368-85-0x0000000002650000-0x0000000002690000-memory.dmp

Filesize
256KB

Download
memory/580-83-0x0000000002790000-0x00000000027D0000-memory.dmp

Filesize
256KB

Download
memory/1100-57-0x0000000007240000-0x0000000007280000-memory.dmp

Filesize
256KB

Download
memory/1100-59-0x0000000007B50000-0x0000000007C34000-memory.dmp

Filesize
912KB

Download
memory/1100-58-0x0000000000530000-0x000000000053C000-memory.dmp

Filesize
48KB

Download
memory/1100-72-0x0000000000450000-0x00000000004BC000-memory.dmp

Filesize
432KB

Download
memory/1100-54-0x0000000000EA0000-0x0000000000FC4000-memory.dmp

Filesize
1.1MB

Download
memory/1100-56-0x0000000000510000-0x000000000052C000-memory.dmp

Filesize
112KB

Download
memory/1100-55-0x0000000007240000-0x0000000007280000-memory.dmp

Filesize
256KB

Download
memory/1824-75-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/1824-77-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/1824-78-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/1824-80-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/1824-82-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/1824-73-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/1824-74-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/1824-76-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/1824-86-0x00000000004B0000-0x00000000004F0000-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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Downloads