asyncrat | 5dc7c78773f8da9ae20096d51ead4b4a79007252010215120522bec5118ef1aa

General

Target

Acuerdo_Legal.N21237..exe
Size

2.5MB
MD5

49ec7b0a10c0c2fddf8ee9931e220a87
SHA1

54389b474b33191afaf45fb464199f1a3089154a
SHA256

edd192a65b9a5d7df1076294077e896a872bf8c6c1ab8799415f1ddaf32e0144
SHA512

12b51b3782016b178b963ac7d598baf66b1c14bd04d5171c568ee82eea5f5e51fadace586053f726eb894c8f8a1dc2027e80d1e8aab5284c00c55f0705ff83a0
SSDEEP

24576:oaF026oYvOqQcttZV3XzAsBahnBiSjNUwauYGA7oQb7dTcb+f9Gj4cEpFCkhzrE9:POOwtpahnESjNGv77TkmGSXEhN3U9o

Score

10^/10

asyncrat z-oct-16 discovery persistence rat

Malware Config

Extracted

Family

asyncrat

Version

1.0.7

Botnet

Z-Oct-16

C2

pt4040.4cloud.click:4004

Mutex

DcRatMutex_qwqdanchun

Attributes

delay
1
install
false
install_folder
%AppData%

aes.plain

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
rat asyncrat

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

Acuerdo_Legal.N21237..exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3063565911-2056067323-3330884624-1000\Software\Microsoft\Windows\CurrentVersion\Run\TechDesignerEditor = "C:\\Users\\Admin\\Music\\TechDesignerUpdater\\TechConvertVideo.exe"	Acuerdo_Legal.N21237..exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

Acuerdo_Legal.N21237..exe

description pid process target process

PID 1728 set thread context of 2452 1728 Acuerdo_Legal.N21237..exe csc.exe

description	pid	process	target process
PID 1728 set thread context of 2452	1728	Acuerdo_Legal.N21237..exe	csc.exe

System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

Processes:

Acuerdo_Legal.N21237..execsc.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Acuerdo_Legal.N21237..exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	csc.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

csc.exe

description pid process

Token: SeDebugPrivilege 2452 csc.exe

description	pid	process
Token: SeDebugPrivilege	2452	csc.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

Acuerdo_Legal.N21237..exe

description	pid	process	target process
PID 1728 wrote to memory of 2452	1728	Acuerdo_Legal.N21237..exe	csc.exe
PID 1728 wrote to memory of 2452	1728	Acuerdo_Legal.N21237..exe	csc.exe
PID 1728 wrote to memory of 2452	1728	Acuerdo_Legal.N21237..exe	csc.exe
PID 1728 wrote to memory of 2452	1728	Acuerdo_Legal.N21237..exe	csc.exe
PID 1728 wrote to memory of 2452	1728	Acuerdo_Legal.N21237..exe	csc.exe
PID 1728 wrote to memory of 2452	1728	Acuerdo_Legal.N21237..exe	csc.exe

C:\Users\Admin\AppData\Local\Temp\Acuerdo_Legal.N21237..exe
"C:\Users\Admin\AppData\Local\Temp\Acuerdo_Legal.N21237..exe"
1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1728

C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe
"C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe"
2⤵
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:2452

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\CabCFCF.tmp

Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

Download Submit
memory/1728-17-0x0000000000400000-0x00000000006A5000-memory.dmp

Filesize
2.6MB

Download
memory/1728-7-0x0000000000400000-0x00000000006A5000-memory.dmp

Filesize
2.6MB

Download
memory/1728-19-0x0000000000400000-0x00000000006A5000-memory.dmp

Filesize
2.6MB

Download
memory/1728-2-0x0000000000511000-0x0000000000529000-memory.dmp

Filesize
96KB

Download
memory/1728-4-0x0000000000400000-0x00000000006A5000-memory.dmp

Filesize
2.6MB

Download
memory/1728-8-0x0000000000400000-0x00000000006A5000-memory.dmp

Filesize
2.6MB

Download
memory/1728-0-0x0000000000400000-0x00000000006A5000-memory.dmp

Filesize
2.6MB

Download
memory/1728-5-0x0000000000400000-0x00000000006A5000-memory.dmp

Filesize
2.6MB

Download
memory/1728-1-0x0000000000400000-0x00000000006A5000-memory.dmp

Filesize
2.6MB

Download
memory/2452-40-0x00000000742A0000-0x000000007498E000-memory.dmp

Filesize
6.9MB

Download
memory/2452-10-0x00000000FFFDE000-0x00000000FFFDF000-memory.dmp

Filesize
4KB

Download
memory/2452-11-0x0000000000080000-0x0000000000092000-memory.dmp

Filesize
72KB

Download
memory/2452-14-0x0000000000080000-0x0000000000092000-memory.dmp

Filesize
72KB

Download
memory/2452-9-0x0000000000080000-0x0000000000092000-memory.dmp

Filesize
72KB

Download
memory/2452-21-0x00000000742A0000-0x000000007498E000-memory.dmp

Filesize
6.9MB

Download
memory/2452-20-0x00000000742AE000-0x00000000742AF000-memory.dmp

Filesize
4KB

Download
memory/2452-39-0x00000000742AE000-0x00000000742AF000-memory.dmp

Filesize
4KB

Download
memory/2452-16-0x0000000000080000-0x0000000000092000-memory.dmp

Filesize
72KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads