asyncrat | ce465307961879325090f1e36cb599bd60fecd44386240d89fbb82c7fdd40799

General

Target

Dmup.exe
Size

345KB
MD5

3812edfc14784ce52c995881e974353d
SHA1

c5846ad5d998be2d9de895b4fdccb17a3afcd5b2
SHA256

ce465307961879325090f1e36cb599bd60fecd44386240d89fbb82c7fdd40799
SHA512

3a832d0a255b883336e873afb4c5ff85e6526ac23a84ec4d6ba810ce6b7083f454d0513c68c9e076d0c40935021d62f7e423ad64410ffdf07a7f873a0a86d2db

Score

10^/10

asyncrat 2 persistence rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

2

C2

212.193.30.54:9524

Mutex

wyQ92!.,=FT72few

Attributes

delay
3
install
false
install_folder
%AppData%

aes.plain

Signatures

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

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral2/memory/5036-139-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000\Control Panel\International\Geo\Nation	Dmup.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Yhjysc = "\"C:\\Users\\Admin\\AppData\\Roaming\\Zgljnmrhu\\Yhjysc.exe\""	Dmup.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3728 set thread context of 5036	3728	Dmup.exe	94

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
3304	timeout.exe

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
3728	Dmup.exe
3728	Dmup.exe
3728	Dmup.exe
3728	Dmup.exe
3728	Dmup.exe
3728	Dmup.exe
3728	Dmup.exe
3728	Dmup.exe
3728	Dmup.exe
3728	Dmup.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3728	Dmup.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 3728 wrote to memory of 3548	3728	Dmup.exe	79
PID 3728 wrote to memory of 3548	3728	Dmup.exe	79
PID 3728 wrote to memory of 3548	3728	Dmup.exe	79
PID 3548 wrote to memory of 3304	3548	cmd.exe	81
PID 3548 wrote to memory of 3304	3548	cmd.exe	81
PID 3548 wrote to memory of 3304	3548	cmd.exe	81
PID 3728 wrote to memory of 1424	3728	Dmup.exe	92
PID 3728 wrote to memory of 1424	3728	Dmup.exe	92
PID 3728 wrote to memory of 1424	3728	Dmup.exe	92
PID 3728 wrote to memory of 2596	3728	Dmup.exe	93
PID 3728 wrote to memory of 2596	3728	Dmup.exe	93
PID 3728 wrote to memory of 2596	3728	Dmup.exe	93
PID 3728 wrote to memory of 5036	3728	Dmup.exe	94
PID 3728 wrote to memory of 5036	3728	Dmup.exe	94
PID 3728 wrote to memory of 5036	3728	Dmup.exe	94
PID 3728 wrote to memory of 5036	3728	Dmup.exe	94
PID 3728 wrote to memory of 5036	3728	Dmup.exe	94
PID 3728 wrote to memory of 5036	3728	Dmup.exe	94
PID 3728 wrote to memory of 5036	3728	Dmup.exe	94
PID 3728 wrote to memory of 5036	3728	Dmup.exe	94

C:\Users\Admin\AppData\Local\Temp\Dmup.exe
"C:\Users\Admin\AppData\Local\Temp\Dmup.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3728
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c timeout 19
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3548
- - C:\Windows\SysWOW64\timeout.exe
    timeout 19
    3⤵
    - Delays execution with timeout.exe
    PID:3304
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
  C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
  2⤵
  PID:1424
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
  C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
  2⤵
  PID:2596
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
  C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
  2⤵
  PID:5036

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/3728-130-0x0000000000630000-0x000000000068C000-memory.dmp

Filesize
368KB

Download
memory/3728-133-0x0000000006030000-0x00000000065D4000-memory.dmp

Filesize
5.6MB

Download
memory/3728-134-0x0000000005B60000-0x0000000005BF2000-memory.dmp

Filesize
584KB

Download
memory/3728-135-0x00000000059B0000-0x0000000005A16000-memory.dmp

Filesize
408KB

Download
memory/5036-139-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download

Analysis

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