asyncrat | 1a6a7ea1669f66f5e5249b3acabc68f4ef1fbe770f016dbbf47a2de4dc545c12

General

Target

INV_FG59.EXE
Size

1.2MB
MD5

97995b3f92bf70117841d386fe556497
SHA1

b817858dbe60a1975adbb7fa00524a65f38077e0
SHA256

02d0d2a6ee7f1e728599f0e16ff5bb3618a67fd63d0cb1f20a90ac2fe8eca670
SHA512

ab4a84fcd4b1bc7f73a22f671d65cb3ba2c5c396fc88d1db23cd641467961186fbfe530288e1fb548170b7af9bffbc620ca486d86ae5629908f64241246b8399

Score

10^/10

asyncrat persistence rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

C2

54.36.220.171:7707

54.36.220.171:8808

54.36.220.171:5050

Mutex

Mutex_6SI8OkPnk

Attributes

aes_key
DiOIHNqQSoNMUZLXqq4Zuqb1foyxPfJ1
anti_detection
false
autorun
false
bdos
false
delay
last_Last
host
54.36.220.171
hwid
3
install_file
install_folder
%AppData%
mutex
Mutex_6SI8OkPnk
pastebin_config
null
port
7707,8808,5050
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:

INV_FG59.EXE

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3341490333-719741536-2920803124-1000\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\shell = "explorer.exe,\"C:\\Users\\Admin\\AppData\\Local\\Temp\\INV_FG59.EXE\""	INV_FG59.EXE

Async RAT payload 2 IoCs

rat

Processes:

resource	yara_rule
behavioral2/memory/2656-16-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat
behavioral2/memory/2656-17-0x000000000040C6DE-mapping.dmp	asyncrat

Drops startup file 2 IoCs

Processes:

INV_FG59.EXE

description	ioc	process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\INV_FG59.EXE	INV_FG59.EXE
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\INV_FG59.EXE	INV_FG59.EXE

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

INV_FG59.EXE

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3341490333-719741536-2920803124-1000\Software\Microsoft\Windows\CurrentVersion\Run\INV_FG59.EXE = "C:\\Users\\Admin\\AppData\\Local\\Temp\\INV_FG59.EXE"	INV_FG59.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-3341490333-719741536-2920803124-1000\Software\Microsoft\Windows\CurrentVersion\Run\<Unknown> = "C:\\Users\\Admin\\AppData\\Local\\Temp\\INV_FG59.EXE"	INV_FG59.EXE

Suspicious use of NtSetInformationThreadHideFromDebugger 13 IoCs

Processes:

INV_FG59.EXE

pid	process
652	INV_FG59.EXE
652	INV_FG59.EXE
652	INV_FG59.EXE
652	INV_FG59.EXE
652	INV_FG59.EXE
652	INV_FG59.EXE
652	INV_FG59.EXE
652	INV_FG59.EXE
652	INV_FG59.EXE
652	INV_FG59.EXE
652	INV_FG59.EXE
652	INV_FG59.EXE
652	INV_FG59.EXE

Suspicious use of SetThreadContext 1 IoCs

Processes:

INV_FG59.EXE

description pid process target process

PID 652 set thread context of 2656 652 INV_FG59.EXE regsvcs.exe
Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

3808 652 WerFault.exe INV_FG59.EXE
Delays execution with timeout.exe 3 IoCs
evasion

Processes:

timeout.exetimeout.exetimeout.exe

pid process

2728 timeout.exe
3548 timeout.exe
1500 timeout.exe

description	pid	process	target process
PID 652 set thread context of 2656	652	INV_FG59.EXE	regsvcs.exe

pid	pid_target	process	target process
3808	652	WerFault.exe	INV_FG59.EXE

pid	process
2728	timeout.exe
3548	timeout.exe
1500	timeout.exe

Suspicious behavior: EnumeratesProcesses 18 IoCs

Processes:

INV_FG59.EXEWerFault.exe

pid	process
652	INV_FG59.EXE
652	INV_FG59.EXE
652	INV_FG59.EXE
3808	WerFault.exe
3808	WerFault.exe
3808	WerFault.exe
3808	WerFault.exe
3808	WerFault.exe
3808	WerFault.exe
3808	WerFault.exe
3808	WerFault.exe
3808	WerFault.exe
3808	WerFault.exe
3808	WerFault.exe
3808	WerFault.exe
3808	WerFault.exe
3808	WerFault.exe
3808	WerFault.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

Processes:

INV_FG59.EXEWerFault.exeregsvcs.exe

description	pid	process
Token: SeDebugPrivilege	652	INV_FG59.EXE
Token: SeRestorePrivilege	3808	WerFault.exe
Token: SeBackupPrivilege	3808	WerFault.exe
Token: SeDebugPrivilege	3808	WerFault.exe
Token: SeDebugPrivilege	2656	regsvcs.exe

Suspicious use of WriteProcessMemory 26 IoCs

Processes:

INV_FG59.EXEcmd.execmd.execmd.exe

description	pid	process	target process
PID 652 wrote to memory of 3272	652	INV_FG59.EXE	cmd.exe
PID 652 wrote to memory of 3272	652	INV_FG59.EXE	cmd.exe
PID 652 wrote to memory of 3272	652	INV_FG59.EXE	cmd.exe
PID 3272 wrote to memory of 2728	3272	cmd.exe	timeout.exe
PID 3272 wrote to memory of 2728	3272	cmd.exe	timeout.exe
PID 3272 wrote to memory of 2728	3272	cmd.exe	timeout.exe
PID 652 wrote to memory of 2136	652	INV_FG59.EXE	cmd.exe
PID 652 wrote to memory of 2136	652	INV_FG59.EXE	cmd.exe
PID 652 wrote to memory of 2136	652	INV_FG59.EXE	cmd.exe
PID 2136 wrote to memory of 3548	2136	cmd.exe	timeout.exe
PID 2136 wrote to memory of 3548	2136	cmd.exe	timeout.exe
PID 2136 wrote to memory of 3548	2136	cmd.exe	timeout.exe
PID 652 wrote to memory of 636	652	INV_FG59.EXE	cmd.exe
PID 652 wrote to memory of 636	652	INV_FG59.EXE	cmd.exe
PID 652 wrote to memory of 636	652	INV_FG59.EXE	cmd.exe
PID 636 wrote to memory of 1500	636	cmd.exe	timeout.exe
PID 636 wrote to memory of 1500	636	cmd.exe	timeout.exe
PID 636 wrote to memory of 1500	636	cmd.exe	timeout.exe
PID 652 wrote to memory of 2656	652	INV_FG59.EXE	regsvcs.exe
PID 652 wrote to memory of 2656	652	INV_FG59.EXE	regsvcs.exe
PID 652 wrote to memory of 2656	652	INV_FG59.EXE	regsvcs.exe
PID 652 wrote to memory of 2656	652	INV_FG59.EXE	regsvcs.exe
PID 652 wrote to memory of 2656	652	INV_FG59.EXE	regsvcs.exe
PID 652 wrote to memory of 2656	652	INV_FG59.EXE	regsvcs.exe
PID 652 wrote to memory of 2656	652	INV_FG59.EXE	regsvcs.exe
PID 652 wrote to memory of 2656	652	INV_FG59.EXE	regsvcs.exe

C:\Users\Admin\AppData\Local\Temp\INV_FG59.EXE
"C:\Users\Admin\AppData\Local\Temp\INV_FG59.EXE"
1⤵
- Modifies WinLogon for persistence
- Drops startup file
- Adds Run key to start application
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:652

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c timeout 1
2⤵
- Suspicious use of WriteProcessMemory
PID:3272

C:\Windows\SysWOW64\timeout.exe
timeout 1
3⤵
- Delays execution with timeout.exe
PID:2728

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c timeout 1
2⤵
- Suspicious use of WriteProcessMemory
PID:2136

C:\Windows\SysWOW64\timeout.exe
timeout 1
3⤵
- Delays execution with timeout.exe
PID:3548

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c timeout 1
2⤵
- Suspicious use of WriteProcessMemory
PID:636

C:\Windows\SysWOW64\timeout.exe
timeout 1
3⤵
- Delays execution with timeout.exe
PID:1500

C:\Windows\Microsoft.NET\Framework\v4.0.30319\regsvcs.exe
"C:\Windows\Microsoft.NET\Framework\v4.0.30319\regsvcs.exe"
2⤵
- Suspicious use of AdjustPrivilegeToken
PID:2656

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 652 -s 1600
2⤵
- Program crash
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:3808

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

memory/636-14-0x0000000000000000-mapping.dmp

Download
memory/652-3-0x0000000000550000-0x0000000000551000-memory.dmp

Filesize
4KB

Download
memory/652-5-0x0000000005040000-0x0000000005041000-memory.dmp

Filesize
4KB

Download
memory/652-6-0x00000000055E0000-0x00000000055E1000-memory.dmp

Filesize
4KB

Download
memory/652-7-0x00000000052C0000-0x00000000052C1000-memory.dmp

Filesize
4KB

Download
memory/652-8-0x0000000005020000-0x0000000005021000-memory.dmp

Filesize
4KB

Download
memory/652-9-0x00000000051E0000-0x0000000005206000-memory.dmp

Filesize
152KB

Download
memory/652-2-0x0000000073FF0000-0x00000000746DE000-memory.dmp

Filesize
6.9MB

Download
memory/1500-15-0x0000000000000000-mapping.dmp

Download
memory/2136-12-0x0000000000000000-mapping.dmp

Download
memory/2656-16-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2656-17-0x000000000040C6DE-mapping.dmp

Download
memory/2656-18-0x0000000073FF0000-0x00000000746DE000-memory.dmp

Filesize
6.9MB

Download
memory/2656-26-0x0000000005840000-0x0000000005841000-memory.dmp

Filesize
4KB

Download
memory/2728-11-0x0000000000000000-mapping.dmp

Download
memory/3272-10-0x0000000000000000-mapping.dmp

Download
memory/3548-13-0x0000000000000000-mapping.dmp

Download
memory/3808-21-0x0000000004BB0000-0x0000000004BB1000-memory.dmp

Filesize
4KB

Download

Resubmissions

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads