asyncrat | f8d44d7880640da690ec310d1d562a37f0f63e45503d8eb8710f40dd062cf401

General

Target

SARS Documents.doc
Size

36KB
MD5

ea2c22c96421b40396d9d9a5ef2e4dc4
SHA1

77a04b21f8e8c57b7f24c6681fcac30ca09fd42b
SHA256

f8d44d7880640da690ec310d1d562a37f0f63e45503d8eb8710f40dd062cf401
SHA512

70068a330cbb1e368f941625649e0a5f0fc8f6da9def43a440ca9d19fece1f74a51ff03f7e430278f1cdf9c2c762f271f985b15cf96a40438d9a9bcc97b5814a

Score

10^/10

asyncrat rat spyware stealer

Malware Config

Signatures

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

Async RAT payload 1 IoCs

rat

Processes:

resource	yara_rule
behavioral2/memory/860-185-0x000000000040D0AE-mapping.dmp	asyncrat

Executes dropped EXE 2 IoCs

Processes:

ySWLi.exeySWLi.exe

pid process

2488 ySWLi.exe
860 ySWLi.exe
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081
Suspicious use of SetThreadContext 1 IoCs

Processes:

ySWLi.exe

description pid process target process

PID 2488 set thread context of 860 2488 ySWLi.exe ySWLi.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

pid	process
2488	ySWLi.exe
860	ySWLi.exe

description	pid	process	target process
PID 2488 set thread context of 860	2488	ySWLi.exe	ySWLi.exe

Checks processor information in registry 2 TTPs 3 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

Processes:

WINWORD.EXE

description	ioc	process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	WINWORD.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	WINWORD.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	WINWORD.EXE

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

636 schtasks.exe

pid	process
636	schtasks.exe

Enumerates system info in registry 2 TTPs 3 IoCs

Query Registry

T1012

System Information Discovery

T1082

Processes:

WINWORD.EXE

description	ioc	process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	WINWORD.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily	WINWORD.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	WINWORD.EXE

Suspicious behavior: AddClipboardFormatListener 2 IoCs

Processes:

WINWORD.EXE

pid process

740 WINWORD.EXE
740 WINWORD.EXE
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

ySWLi.exe

pid process

2488 ySWLi.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

ySWLi.exeySWLi.exe

description pid process

Token: SeDebugPrivilege 2488 ySWLi.exe
Token: SeDebugPrivilege 860 ySWLi.exe
Suspicious use of SetWindowsHookEx 7 IoCs

Processes:

WINWORD.EXE

pid process

740 WINWORD.EXE
740 WINWORD.EXE
740 WINWORD.EXE
740 WINWORD.EXE
740 WINWORD.EXE
740 WINWORD.EXE
740 WINWORD.EXE

pid	process
740	WINWORD.EXE
740	WINWORD.EXE

pid	process
2488	ySWLi.exe

description	pid	process
Token: SeDebugPrivilege	2488	ySWLi.exe
Token: SeDebugPrivilege	860	ySWLi.exe

pid	process
740	WINWORD.EXE
740	WINWORD.EXE
740	WINWORD.EXE
740	WINWORD.EXE
740	WINWORD.EXE
740	WINWORD.EXE
740	WINWORD.EXE

Suspicious use of WriteProcessMemory 14 IoCs

Processes:

WINWORD.EXEySWLi.exe

description	pid	process	target process
PID 740 wrote to memory of 2488	740	WINWORD.EXE	ySWLi.exe
PID 740 wrote to memory of 2488	740	WINWORD.EXE	ySWLi.exe
PID 740 wrote to memory of 2488	740	WINWORD.EXE	ySWLi.exe
PID 2488 wrote to memory of 636	2488	ySWLi.exe	schtasks.exe
PID 2488 wrote to memory of 636	2488	ySWLi.exe	schtasks.exe
PID 2488 wrote to memory of 636	2488	ySWLi.exe	schtasks.exe
PID 2488 wrote to memory of 860	2488	ySWLi.exe	ySWLi.exe
PID 2488 wrote to memory of 860	2488	ySWLi.exe	ySWLi.exe
PID 2488 wrote to memory of 860	2488	ySWLi.exe	ySWLi.exe
PID 2488 wrote to memory of 860	2488	ySWLi.exe	ySWLi.exe
PID 2488 wrote to memory of 860	2488	ySWLi.exe	ySWLi.exe
PID 2488 wrote to memory of 860	2488	ySWLi.exe	ySWLi.exe
PID 2488 wrote to memory of 860	2488	ySWLi.exe	ySWLi.exe
PID 2488 wrote to memory of 860	2488	ySWLi.exe	ySWLi.exe

C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE
"C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE" /n "C:\Users\Admin\AppData\Local\Temp\SARS Documents.doc" /o ""
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:740

C:\Users\Admin\AppData\Local\Temp\ySWLi.exe
C:\Users\Admin\AppData\Local\Temp\ySWLi.exe
2⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2488

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\JrBmDGuxgYcA" /XML "C:\Users\Admin\AppData\Local\Temp\tmpCC10.tmp"
3⤵
- Creates scheduled task(s)
PID:636

C:\Users\Admin\AppData\Local\Temp\ySWLi.exe
"{path}"
3⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:860

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

Credentials in Files

1

T1081

Discovery

System Information Discovery

3

T1082

Query Registry

2

T1012

Lateral Movement

Collection

Data from Local System

1

T1005

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmpCC10.tmp
MD5
e9f1274e3aa5be17d5d3dea3e5ba297c

SHA1
3b92e22a600f4db8c2712dbc7cd7a0d65981b510

SHA256
82e4124dadbdcf5f72c59c6d6738cf2c509b939537af5b657ca432993cb876c1

SHA512
14bf5f431cd886e8f0f887464f67358c7b0b50f121bbb6cf301620b210e6110295c4edcf42106d56681cf178494059849d5a3c6125b74ffbada1788733a027d0

Download Submit
C:\Users\Admin\AppData\Local\Temp\ySWLi.exe
MD5
5794b56493325993815144d377d06a2a

SHA1
eebd6c8fab55d73b29e2093832eb6a9e2c71653e

SHA256
8e7f1812d857f3cae2aa6a79c2d87f0e7987a786b1f15df31ee75513cb1156bf

SHA512
1537d5c7e7a70130ee1af56a90c504ce4130d051906ad41d70e793bcced3893ee336e2cd6cb8165e997fa6e9b3c266f59eccd9b97aa15e2d19ea2c9385e3a324

Download Submit
C:\Users\Admin\AppData\Local\Temp\ySWLi.exe
MD5
5794b56493325993815144d377d06a2a

SHA1
eebd6c8fab55d73b29e2093832eb6a9e2c71653e

SHA256
8e7f1812d857f3cae2aa6a79c2d87f0e7987a786b1f15df31ee75513cb1156bf

SHA512
1537d5c7e7a70130ee1af56a90c504ce4130d051906ad41d70e793bcced3893ee336e2cd6cb8165e997fa6e9b3c266f59eccd9b97aa15e2d19ea2c9385e3a324

Download Submit
C:\Users\Admin\AppData\Local\Temp\ySWLi.exe
MD5
5794b56493325993815144d377d06a2a

SHA1
eebd6c8fab55d73b29e2093832eb6a9e2c71653e

SHA256
8e7f1812d857f3cae2aa6a79c2d87f0e7987a786b1f15df31ee75513cb1156bf

SHA512
1537d5c7e7a70130ee1af56a90c504ce4130d051906ad41d70e793bcced3893ee336e2cd6cb8165e997fa6e9b3c266f59eccd9b97aa15e2d19ea2c9385e3a324

Download Submit
memory/636-183-0x0000000000000000-mapping.dmp

Download
memory/740-118-0x00007FFD56C40000-0x00007FFD59763000-memory.dmp

Filesize
43.1MB

Download
memory/740-117-0x00007FFD35790000-0x00007FFD357A0000-memory.dmp

Filesize
64KB

Download
memory/740-123-0x00007FFD4E340000-0x00007FFD50235000-memory.dmp

Filesize
31.0MB

Download
memory/740-115-0x00007FFD35790000-0x00007FFD357A0000-memory.dmp

Filesize
64KB

Download
memory/740-114-0x00007FFD35790000-0x00007FFD357A0000-memory.dmp

Filesize
64KB

Download
memory/740-119-0x00007FFD35790000-0x00007FFD357A0000-memory.dmp

Filesize
64KB

Download
memory/740-116-0x00007FFD35790000-0x00007FFD357A0000-memory.dmp

Filesize
64KB

Download
memory/740-122-0x00007FFD50240000-0x00007FFD5132E000-memory.dmp

Filesize
16.9MB

Download
memory/860-185-0x000000000040D0AE-mapping.dmp

Download
memory/860-187-0x00000000052E0000-0x00000000052E1000-memory.dmp

Filesize
4KB

Download
memory/2488-150-0x00000000076C0000-0x00000000076C1000-memory.dmp

Filesize
4KB

Download
memory/2488-151-0x0000000007820000-0x0000000007821000-memory.dmp

Filesize
4KB

Download
memory/2488-152-0x0000000007620000-0x0000000007B1E000-memory.dmp

Filesize
5.0MB

Download
memory/2488-154-0x0000000009790000-0x0000000009791000-memory.dmp

Filesize
4KB

Download
memory/2488-167-0x0000000002A90000-0x0000000002A9E000-memory.dmp

Filesize
56KB

Download
memory/2488-149-0x0000000007B20000-0x0000000007B21000-memory.dmp

Filesize
4KB

Download
memory/2488-147-0x00000000007D0000-0x00000000007D1000-memory.dmp

Filesize
4KB

Download
memory/2488-144-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads