asyncrat | 59d6ba5998d9ec44d081a04a07b76ed567b53fd8a7d97c07bb77da75172fe377

General

Target
orden al proveedor.pdf.exe
Size 769KB
Sample200907-dp8zpzrxde
SHA256 59d6ba5998d9ec44d081a04a07b76ed567b53fd8a7d97c07bb77da75172fe377
MD5 20328316e4f6a5baaa139ed31659cf24
SHA1 d903c1e786c24ffeeb2b9f77fa6f20c2fea4c0fb
SHA512 13c15addd1903483789fd87392acc3c99e5b04e4cb4e413c288b5bf3863782a1f671685a732ff21ed9b0b0add0fd3690ce653b834008c386eaef153736d4a22b
MD5 SHA1 SHA512

Score

10^/10

asyncrat rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

C2

null:null

Mutex

AsyncMutex_6SI8OkPnk

Attributes

aes_key
lA8RQD4nJOJ7VPvDUvwml7lHNC1FRpLN
anti_detection
false
autorun
false
bdos
false
delay
Kc
host
null
hwid
3
install_file
install_folder
%AppData%
mutex
AsyncMutex_6SI8OkPnk
pastebin_config
https://pastebin.com/raw/iWWxBLnx
port
null
version
0.5.7B

aes.plain

Signatures

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

Async RAT payload 2 IoCs

rat

resource	yara_rule
behavioral2/memory/2212-12-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat
behavioral2/memory/2212-13-0x000000000040D0AE-mapping.dmp	asyncrat

Legitimate hosting services abused for malware hosting/C2 1 TTPs

Web Service
T1102

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1536 set thread context of 2212	1536	orden al proveedor.pdf.exe	78

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\ServiceProfiles\LocalService\winhttp\cachev3.dat	svchost.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

pid	Process
1888	schtasks.exe

Modifies data under HKEY_USERS 5 IoCs

description	ioc	Process
Set value (int)	\REGISTRY\USER\S-1-5-19\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\0e-3e-6f-2c-c8-c7\WpadDecision = "0"	svchost.exe
Key created	\REGISTRY\USER\S-1-5-19\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad	svchost.exe
Key created	\REGISTRY\USER\S-1-5-19\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\0e-3e-6f-2c-c8-c7	svchost.exe
Set value (int)	\REGISTRY\USER\S-1-5-19\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\0e-3e-6f-2c-c8-c7\WpadDecisionReason = "1"	svchost.exe
Set value (data)	\REGISTRY\USER\S-1-5-19\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\0e-3e-6f-2c-c8-c7\WpadDecisionTime = 3974a61c1f85d601	svchost.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeShutdownPrivilege	752	svchost.exe
Token: SeCreatePagefilePrivilege	752	svchost.exe
Token: SeDebugPrivilege	2212	MSBuild.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 1536 wrote to memory of 1888	1536	orden al proveedor.pdf.exe	76
PID 1536 wrote to memory of 1888	1536	orden al proveedor.pdf.exe	76
PID 1536 wrote to memory of 1888	1536	orden al proveedor.pdf.exe	76
PID 1536 wrote to memory of 2212	1536	orden al proveedor.pdf.exe	78
PID 1536 wrote to memory of 2212	1536	orden al proveedor.pdf.exe	78
PID 1536 wrote to memory of 2212	1536	orden al proveedor.pdf.exe	78
PID 1536 wrote to memory of 2212	1536	orden al proveedor.pdf.exe	78
PID 1536 wrote to memory of 2212	1536	orden al proveedor.pdf.exe	78
PID 1536 wrote to memory of 2212	1536	orden al proveedor.pdf.exe	78
PID 1536 wrote to memory of 2212	1536	orden al proveedor.pdf.exe	78
PID 1536 wrote to memory of 2212	1536	orden al proveedor.pdf.exe	78

C:\Users\Admin\AppData\Local\Temp\orden al proveedor.pdf.exe
"C:\Users\Admin\AppData\Local\Temp\orden al proveedor.pdf.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1536
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\xToPDZjoFJHLhm" /XML "C:\Users\Admin\AppData\Local\Temp\tmp93D4.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:1888
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe"
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2212

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k LocalService -s WinHttpAutoProxySvc
1⤵
- Drops file in Windows directory
- Modifies data under HKEY_USERS
- Suspicious use of AdjustPrivilegeToken
PID:752

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Web Service

1

T1102

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

memory/1536-7-0x0000000007FD0000-0x0000000007FD1000-memory.dmp

Download

memory/1536-3-0x00000000073F0000-0x0000000007400000-memory.dmp

Download

memory/1536-4-0x00000000075C0000-0x00000000075C1000-memory.dmp

Download

memory/1536-5-0x0000000007A30000-0x0000000007A31000-memory.dmp

Download

memory/1536-6-0x0000000007790000-0x00000000077BC000-memory.dmp

Download

memory/1536-0-0x0000000073410000-0x0000000073AFE000-memory.dmp

Download

memory/1536-8-0x00000000079E0000-0x00000000079E2000-memory.dmp

Download

memory/1536-9-0x00000000079F0000-0x0000000007A01000-memory.dmp

Download

memory/1536-1-0x0000000000530000-0x0000000000531000-memory.dmp

Download

memory/2212-12-0x0000000000400000-0x0000000000412000-memory.dmp

Download

memory/2212-14-0x0000000073410000-0x0000000073AFE000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads