asyncrat | 383536471e06eef80e55ff074d896710948eb79d3f90b734b4d32e0876faa79c

General

Target

SKM_C258201001130020005057.exe
Size

757KB
MD5

14592d68532406530e07a1027e89b14f
SHA1

f58566c500070cd8878c45885bbb0ca5e36e79f1
SHA256

383536471e06eef80e55ff074d896710948eb79d3f90b734b4d32e0876faa79c
SHA512

bc2728c1f172576b3a17b751363c7f333914a39cbc274bbb8d62938791f7f522d3b341c433d444e1e385b126ec51b846f413d146dd46f157b2e08a8455a73bd4

Score

10^/10

asyncrat persistence rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

C2

severdops.ddns.net:6204

Mutex

AsyncMutex_6SI8OkPnk

Attributes

aes_key
9csne4PXNqdF9ZKg3xLERR6lPdrhEK0H
anti_detection
false
autorun
false
bdos
false
delay
Default
host
severdops.ddns.net
hwid
3
install_file
install_folder
%AppData%
mutex
AsyncMutex_6SI8OkPnk
pastebin_config
null
port
6204
version
0.5.7B

aes.plain

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers.
rat asyncrat

Modifies WinLogon for persistence 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1004

Modify Registry

T1112

Processes:

SKM_C258201001130020005057.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-1985363256-3005190890-1182679451-1000\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\shell = "explorer.exe,\"C:\\Users\\Admin\\AppData\\Local\\Temp\\SKM_C258201001130020005057.exe\""	SKM_C258201001130020005057.exe

Async RAT payload 2 IoCs

rat

Processes:

resource	yara_rule
behavioral2/memory/504-8-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat
behavioral2/memory/504-9-0x000000000040C71E-mapping.dmp	asyncrat

Drops startup file 2 IoCs

Processes:

SKM_C258201001130020005057.exe

description	ioc	process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\SKM_C258201001130020005057.exe	SKM_C258201001130020005057.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\SKM_C258201001130020005057.exe	SKM_C258201001130020005057.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

SKM_C258201001130020005057.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-1985363256-3005190890-1182679451-1000\Software\Microsoft\Windows\CurrentVersion\Run\<Unknown> = "C:\\Users\\Admin\\AppData\\Local\\Temp\\SKM_C258201001130020005057.exe"	SKM_C258201001130020005057.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1985363256-3005190890-1182679451-1000\Software\Microsoft\Windows\CurrentVersion\Run\SKM_C258201001130020005057.exe = "C:\\Users\\Admin\\AppData\\Local\\Temp\\SKM_C258201001130020005057.exe"	SKM_C258201001130020005057.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

SKM_C258201001130020005057.exe

description pid process target process

PID 648 set thread context of 504 648 SKM_C258201001130020005057.exe SKM_C258201001130020005057.exe
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

SKM_C258201001130020005057.exe

pid process

648 SKM_C258201001130020005057.exe
648 SKM_C258201001130020005057.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

SKM_C258201001130020005057.exeSKM_C258201001130020005057.exe

description pid process

Token: SeDebugPrivilege 648 SKM_C258201001130020005057.exe
Token: SeDebugPrivilege 504 SKM_C258201001130020005057.exe

description	pid	process	target process
PID 648 set thread context of 504	648	SKM_C258201001130020005057.exe	SKM_C258201001130020005057.exe

pid	process
648	SKM_C258201001130020005057.exe
648	SKM_C258201001130020005057.exe

description	pid	process
Token: SeDebugPrivilege	648	SKM_C258201001130020005057.exe
Token: SeDebugPrivilege	504	SKM_C258201001130020005057.exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

SKM_C258201001130020005057.exe

description	pid	process	target process
PID 648 wrote to memory of 2916	648	SKM_C258201001130020005057.exe	SKM_C258201001130020005057.exe
PID 648 wrote to memory of 2916	648	SKM_C258201001130020005057.exe	SKM_C258201001130020005057.exe
PID 648 wrote to memory of 2916	648	SKM_C258201001130020005057.exe	SKM_C258201001130020005057.exe
PID 648 wrote to memory of 504	648	SKM_C258201001130020005057.exe	SKM_C258201001130020005057.exe
PID 648 wrote to memory of 504	648	SKM_C258201001130020005057.exe	SKM_C258201001130020005057.exe
PID 648 wrote to memory of 504	648	SKM_C258201001130020005057.exe	SKM_C258201001130020005057.exe
PID 648 wrote to memory of 504	648	SKM_C258201001130020005057.exe	SKM_C258201001130020005057.exe
PID 648 wrote to memory of 504	648	SKM_C258201001130020005057.exe	SKM_C258201001130020005057.exe
PID 648 wrote to memory of 504	648	SKM_C258201001130020005057.exe	SKM_C258201001130020005057.exe
PID 648 wrote to memory of 504	648	SKM_C258201001130020005057.exe	SKM_C258201001130020005057.exe
PID 648 wrote to memory of 504	648	SKM_C258201001130020005057.exe	SKM_C258201001130020005057.exe

C:\Users\Admin\AppData\Local\Temp\SKM_C258201001130020005057.exe
"C:\Users\Admin\AppData\Local\Temp\SKM_C258201001130020005057.exe"
1⤵
- Modifies WinLogon for persistence
- Drops startup file
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:648

C:\Users\Admin\AppData\Local\Temp\SKM_C258201001130020005057.exe
"C:\Users\Admin\AppData\Local\Temp\SKM_C258201001130020005057.exe"
2⤵
PID:2916

C:\Users\Admin\AppData\Local\Temp\SKM_C258201001130020005057.exe
"C:\Users\Admin\AppData\Local\Temp\SKM_C258201001130020005057.exe"
2⤵
- Suspicious use of AdjustPrivilegeToken
PID:504

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Winlogon Helper DLL

1

T1004

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

2

T1112

Credential Access

Discovery

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\SKM_C258201001130020005057.exe.log
MD5
c0ad7b531cb050d170ceb51110be64db

SHA1
1fc4ff77fe0838a1fec8723139c25d5708ed8c0b

SHA256
2212589a88f2f3fa5c7127e548ea493b3ab2927e2417b54928ec82e3a42a424c

SHA512
148ecaa1ee3259ab2ec63abb28af5daad10534bd48e9afec2984d343c8f9c361f8caed04b32bb0de85d41e3329935e6d100d5036e33bc8fadcda1f7dd1bde436

Download Submit
memory/504-8-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/504-9-0x000000000040C71E-mapping.dmp

Download
memory/504-11-0x0000000073F80000-0x000000007466E000-memory.dmp

Filesize
6.9MB

Download
memory/504-16-0x0000000006490000-0x0000000006491000-memory.dmp

Filesize
4KB

Download
memory/648-2-0x0000000073F80000-0x000000007466E000-memory.dmp

Filesize
6.9MB

Download
memory/648-3-0x0000000000D20000-0x0000000000D21000-memory.dmp

Filesize
4KB

Download
memory/648-5-0x00000000055E0000-0x00000000055E1000-memory.dmp

Filesize
4KB

Download
memory/648-6-0x00000000030C0000-0x00000000030DD000-memory.dmp

Filesize
116KB

Download
memory/648-7-0x0000000005D70000-0x0000000005D71000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads