asyncrat | de1b9f6d4bf9909be6073eb4bb16b724a824e3d3d75baef2cfee19f538c79c7e

General

Target

hkcmd.exe
Size

691KB
MD5

dd505f7c59aa2882633c01034428e952
SHA1

12ffe4b71bdda14909f5d88301597f9cdf75ff94
SHA256

de1b9f6d4bf9909be6073eb4bb16b724a824e3d3d75baef2cfee19f538c79c7e
SHA512

3c79eb968ce299b91d1c456f52c3a6cd2bfd75ae6ac8f6e35c56800e3d2e3f2ceec0e95545cb7cb6c6305e2a26ff1b681c65dd3470f1e9d16b8726e9c223ebd0
SSDEEP

12288:SrgDkO3hHlWxMzIHREJVk/bq4izoW/m7GloyLwo6s7pSCpCETtwpkZQ6b98I:SMA4hHlWxMiQW/O4ue7koUos1JpfhkX4

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

C2

191.101.130.205:6606

191.101.130.205:7707

191.101.130.205:8808

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/1120-68-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat
behavioral1/memory/1120-71-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat
behavioral1/memory/1120-73-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat
behavioral1/memory/1120-75-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat
behavioral1/memory/1120-77-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat

Suspicious use of SetThreadContext 1 IoCs

Processes:

hkcmd.exe

description pid process target process

PID 1144 set thread context of 1120 1144 hkcmd.exe hkcmd.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

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

1736 schtasks.exe
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

powershell.exe

pid process

472 powershell.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

powershell.exe

description pid process

Token: SeDebugPrivilege 472 powershell.exe

description	pid	process	target process
PID 1144 set thread context of 1120	1144	hkcmd.exe	hkcmd.exe

pid	process
1736	schtasks.exe

pid	process
472	powershell.exe

description	pid	process
Token: SeDebugPrivilege	472	powershell.exe

Suspicious use of WriteProcessMemory 17 IoCs

Processes:

hkcmd.exe

description	pid	process	target process
PID 1144 wrote to memory of 472	1144	hkcmd.exe	powershell.exe
PID 1144 wrote to memory of 472	1144	hkcmd.exe	powershell.exe
PID 1144 wrote to memory of 472	1144	hkcmd.exe	powershell.exe
PID 1144 wrote to memory of 472	1144	hkcmd.exe	powershell.exe
PID 1144 wrote to memory of 1736	1144	hkcmd.exe	schtasks.exe
PID 1144 wrote to memory of 1736	1144	hkcmd.exe	schtasks.exe
PID 1144 wrote to memory of 1736	1144	hkcmd.exe	schtasks.exe
PID 1144 wrote to memory of 1736	1144	hkcmd.exe	schtasks.exe
PID 1144 wrote to memory of 1120	1144	hkcmd.exe	hkcmd.exe
PID 1144 wrote to memory of 1120	1144	hkcmd.exe	hkcmd.exe
PID 1144 wrote to memory of 1120	1144	hkcmd.exe	hkcmd.exe
PID 1144 wrote to memory of 1120	1144	hkcmd.exe	hkcmd.exe
PID 1144 wrote to memory of 1120	1144	hkcmd.exe	hkcmd.exe
PID 1144 wrote to memory of 1120	1144	hkcmd.exe	hkcmd.exe
PID 1144 wrote to memory of 1120	1144	hkcmd.exe	hkcmd.exe
PID 1144 wrote to memory of 1120	1144	hkcmd.exe	hkcmd.exe
PID 1144 wrote to memory of 1120	1144	hkcmd.exe	hkcmd.exe

C:\Users\Admin\AppData\Local\Temp\hkcmd.exe
"C:\Users\Admin\AppData\Local\Temp\hkcmd.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1144

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\RjBtcy.exe"
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:472

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\RjBtcy" /XML "C:\Users\Admin\AppData\Local\Temp\tmpC2C4.tmp"
2⤵
- Creates scheduled task(s)
PID:1736

C:\Users\Admin\AppData\Local\Temp\hkcmd.exe
"C:\Users\Admin\AppData\Local\Temp\hkcmd.exe"
2⤵
PID:1120

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\tmpC2C4.tmp
Filesize
1KB

MD5
80028b3456429d4c52c60e3d35328e3d

SHA1
276ed1b051bf3fe4c0c76023db7ce2bd2a916339

SHA256
40bd885ed5ef0875b82bdd5e103fa9d40f38127285bcd0b67dc2fd912f2db6d1

SHA512
f14decf1ddcaaa95fe824b305ffd17a4ff9f4de59da2ea4e82f2f6d3acda709a81936254ed65c98025f9de87a30f877f050cc3ca0acf268cf2ebb2a7cf428c7a

Download Submit
memory/472-79-0x00000000026F0000-0x0000000002730000-memory.dmp

Filesize
256KB

Download
memory/472-78-0x00000000026F0000-0x0000000002730000-memory.dmp

Filesize
256KB

Download
memory/1120-72-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/1120-73-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/1120-80-0x0000000004780000-0x00000000047C0000-memory.dmp

Filesize
256KB

Download
memory/1120-77-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/1120-75-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/1120-66-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/1120-67-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/1120-68-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/1120-71-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/1144-54-0x0000000000D40000-0x0000000000DF2000-memory.dmp

Filesize
712KB

Download
memory/1144-58-0x0000000000BA0000-0x0000000000BAC000-memory.dmp

Filesize
48KB

Download
memory/1144-65-0x0000000004C20000-0x0000000004C34000-memory.dmp

Filesize
80KB

Download
memory/1144-57-0x0000000000A10000-0x0000000000A50000-memory.dmp

Filesize
256KB

Download
memory/1144-56-0x0000000000A00000-0x0000000000A12000-memory.dmp

Filesize
72KB

Download
memory/1144-55-0x0000000000A10000-0x0000000000A50000-memory.dmp

Filesize
256KB

Download
memory/1144-59-0x0000000004490000-0x00000000044DE000-memory.dmp

Filesize
312KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads