asyncrat | 051988e2e2a1ef5e3a27c935e6b694268eea61d3dc790b7e99d86560d772df8f

General

Target

051988E2E2A1EF5E3A27C935E6B694268EEA61D3DC790.exe
Size

986KB
MD5

1de9a9696cb0de0c4b5d80a069f011c8
SHA1

ebcbec44ec2755337a49a84935a3917867d6e4f4
SHA256

051988e2e2a1ef5e3a27c935e6b694268eea61d3dc790b7e99d86560d772df8f
SHA512

8f8f848c9775472f51e70eb49020235d109a51f1be9f6f6b25389f7586fe4056b23f153317e50cafcbcd0ae40d7b95c395be28734090b32bbaa098afccfd52fd

Score

10^/10

asyncrat evasion rat suricata

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

C2

marianavilla3008o.duckdns.org:1020

Mutex

AsyncMutex_6SI8OkPnk

Attributes

aes_key
0BWUkyqcUqHqVx84fueTgswHmIDOrV5h
anti_detection
false
autorun
false
bdos
false
delay
Default
host
marianavilla3008o.duckdns.org,
hwid
3
install_file
install_folder
%AppData%
mutex
AsyncMutex_6SI8OkPnk
pastebin_config
null
port
1020
version
0.5.7B

aes.plain

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers.
rat asyncrat
suricata: ET MALWARE Observed Malicious SSL Cert (AsyncRAT Server)
suricata

Async RAT payload 2 IoCs

rat

Processes:

resource	yara_rule
behavioral2/memory/488-129-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat
behavioral2/memory/488-130-0x000000000040C73E-mapping.dmp	asyncrat

CustAttr .NET packer 1 IoCs

Detects CustAttr .NET packer in memory.

Processes:

resource	yara_rule
behavioral2/memory/992-122-0x0000000004F60000-0x0000000004F65000-memory.dmp	CustAttr

Looks for VirtualBox Guest Additions in registry 2 TTPs
evasion

Query Registry
T1012

Virtualization/Sandbox Evasion
T1497
Looks for VMWare Tools registry key 2 TTPs
evasion

Query Registry
T1012

Virtualization/Sandbox Evasion
T1497

Checks BIOS information in registry 2 TTPs 2 IoCs

BIOS information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

Processes:

051988E2E2A1EF5E3A27C935E6B694268EEA61D3DC790.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	051988E2E2A1EF5E3A27C935E6B694268EEA61D3DC790.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	051988E2E2A1EF5E3A27C935E6B694268EEA61D3DC790.exe

Maps connected drives based on registry 3 TTPs 2 IoCs

Disk information is often read in order to detect sandboxing environments.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

Processes:

051988E2E2A1EF5E3A27C935E6B694268EEA61D3DC790.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	051988E2E2A1EF5E3A27C935E6B694268EEA61D3DC790.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum\0	051988E2E2A1EF5E3A27C935E6B694268EEA61D3DC790.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

051988E2E2A1EF5E3A27C935E6B694268EEA61D3DC790.exe

description	pid	process	target process
PID 992 set thread context of 488	992	051988E2E2A1EF5E3A27C935E6B694268EEA61D3DC790.exe	051988E2E2A1EF5E3A27C935E6B694268EEA61D3DC790.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

1540 schtasks.exe
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

051988E2E2A1EF5E3A27C935E6B694268EEA61D3DC790.exe

pid process

992 051988E2E2A1EF5E3A27C935E6B694268EEA61D3DC790.exe

pid	process
1540	schtasks.exe

pid	process
992	051988E2E2A1EF5E3A27C935E6B694268EEA61D3DC790.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

051988E2E2A1EF5E3A27C935E6B694268EEA61D3DC790.exe051988E2E2A1EF5E3A27C935E6B694268EEA61D3DC790.exe

description	pid	process
Token: SeDebugPrivilege	992	051988E2E2A1EF5E3A27C935E6B694268EEA61D3DC790.exe
Token: SeDebugPrivilege	488	051988E2E2A1EF5E3A27C935E6B694268EEA61D3DC790.exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

051988E2E2A1EF5E3A27C935E6B694268EEA61D3DC790.exe

description	pid	process	target process
PID 992 wrote to memory of 1540	992	051988E2E2A1EF5E3A27C935E6B694268EEA61D3DC790.exe	schtasks.exe
PID 992 wrote to memory of 1540	992	051988E2E2A1EF5E3A27C935E6B694268EEA61D3DC790.exe	schtasks.exe
PID 992 wrote to memory of 1540	992	051988E2E2A1EF5E3A27C935E6B694268EEA61D3DC790.exe	schtasks.exe
PID 992 wrote to memory of 488	992	051988E2E2A1EF5E3A27C935E6B694268EEA61D3DC790.exe	051988E2E2A1EF5E3A27C935E6B694268EEA61D3DC790.exe
PID 992 wrote to memory of 488	992	051988E2E2A1EF5E3A27C935E6B694268EEA61D3DC790.exe	051988E2E2A1EF5E3A27C935E6B694268EEA61D3DC790.exe
PID 992 wrote to memory of 488	992	051988E2E2A1EF5E3A27C935E6B694268EEA61D3DC790.exe	051988E2E2A1EF5E3A27C935E6B694268EEA61D3DC790.exe
PID 992 wrote to memory of 488	992	051988E2E2A1EF5E3A27C935E6B694268EEA61D3DC790.exe	051988E2E2A1EF5E3A27C935E6B694268EEA61D3DC790.exe
PID 992 wrote to memory of 488	992	051988E2E2A1EF5E3A27C935E6B694268EEA61D3DC790.exe	051988E2E2A1EF5E3A27C935E6B694268EEA61D3DC790.exe
PID 992 wrote to memory of 488	992	051988E2E2A1EF5E3A27C935E6B694268EEA61D3DC790.exe	051988E2E2A1EF5E3A27C935E6B694268EEA61D3DC790.exe
PID 992 wrote to memory of 488	992	051988E2E2A1EF5E3A27C935E6B694268EEA61D3DC790.exe	051988E2E2A1EF5E3A27C935E6B694268EEA61D3DC790.exe
PID 992 wrote to memory of 488	992	051988E2E2A1EF5E3A27C935E6B694268EEA61D3DC790.exe	051988E2E2A1EF5E3A27C935E6B694268EEA61D3DC790.exe

C:\Users\Admin\AppData\Local\Temp\051988E2E2A1EF5E3A27C935E6B694268EEA61D3DC790.exe
"C:\Users\Admin\AppData\Local\Temp\051988E2E2A1EF5E3A27C935E6B694268EEA61D3DC790.exe"
1⤵
- Checks BIOS information in registry
- Maps connected drives based on registry
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:992

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\kLTggmZvhe" /XML "C:\Users\Admin\AppData\Local\Temp\tmp5436.tmp"
2⤵
- Creates scheduled task(s)
PID:1540

C:\Users\Admin\AppData\Local\Temp\051988E2E2A1EF5E3A27C935E6B694268EEA61D3DC790.exe
"C:\Users\Admin\AppData\Local\Temp\051988E2E2A1EF5E3A27C935E6B694268EEA61D3DC790.exe"
2⤵
- Suspicious use of AdjustPrivilegeToken
PID:488

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

Virtualization/Sandbox Evasion

2

T1497

Credential Access

Discovery

Query Registry

4

T1012

Virtualization/Sandbox Evasion

2

T1497

System Information Discovery

3

T1082

Peripheral Device Discovery

1

T1120

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp5436.tmp
MD5
c0279f62c3dc6d408fdd4233d0f12574

SHA1
aa8c091305a1bada17b9e9de94ce2099078345a9

SHA256
4b1bc71ef42c548048079ca0e68efe22fb2bf5713adfab6e7cf054f7d4f1301f

SHA512
591c24d15e10164cbbc76edb7243c0d4675aaa6c952b84b53f03d78004895e7695894d44dca435a80460f0e079837ce1a2d9559f5a7c9a56af8097ae96480f68

Download Submit
memory/488-133-0x00000000052A0000-0x00000000052A1000-memory.dmp

Filesize
4KB

Download
memory/488-130-0x000000000040C73E-mapping.dmp

Download
memory/488-129-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/992-123-0x000000007E9F0000-0x000000007E9F1000-memory.dmp

Filesize
4KB

Download
memory/992-120-0x0000000004990000-0x0000000004991000-memory.dmp

Filesize
4KB

Download
memory/992-121-0x0000000004CE0000-0x0000000004CE1000-memory.dmp

Filesize
4KB

Download
memory/992-122-0x0000000004F60000-0x0000000004F65000-memory.dmp

Filesize
20KB

Download
memory/992-114-0x0000000000090000-0x0000000000091000-memory.dmp

Filesize
4KB

Download
memory/992-124-0x0000000005820000-0x00000000058B8000-memory.dmp

Filesize
608KB

Download
memory/992-125-0x00000000008A0000-0x00000000008F2000-memory.dmp

Filesize
328KB

Download
memory/992-126-0x0000000005930000-0x0000000005931000-memory.dmp

Filesize
4KB

Download
memory/992-119-0x0000000004AE0000-0x0000000004FDE000-memory.dmp

Filesize
5.0MB

Download
memory/992-118-0x0000000004B80000-0x0000000004B81000-memory.dmp

Filesize
4KB

Download
memory/992-117-0x0000000004FE0000-0x0000000004FE1000-memory.dmp

Filesize
4KB

Download
memory/992-116-0x00000000049B0000-0x00000000049B1000-memory.dmp

Filesize
4KB

Download
memory/1540-127-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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