asyncrat | f927fc3dee7de6daefed3b155907078344fbfec8bd3d63ed96013c2c9ae1e78e

General

Target

Erodo.exe
Size

342KB
MD5

0d0d64eecf0771dfc73ea6674802c256
SHA1

a9eb93937399030d52ce1641794b0fab1c398724
SHA256

f927fc3dee7de6daefed3b155907078344fbfec8bd3d63ed96013c2c9ae1e78e
SHA512

d424f4ad1298e483d7707d8e8feb5a9bd836830923b487c574b0d1e8cccf3840182e35765220c464e3310caed7c409594af1c2a604302f90d631664ff0765cd1

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 6 IoCs

rat

Processes:

resource	yara_rule
behavioral1/memory/1680-68-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat
behavioral1/memory/1680-69-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat
behavioral1/memory/1680-71-0x000000000040C6BE-mapping.dmp	asyncrat
behavioral1/memory/1680-70-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat
behavioral1/memory/1680-73-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat
behavioral1/memory/1680-75-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

Erodo.exe

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2932610838-281738825-1127631353-1000\Software\Microsoft\Windows\CurrentVersion\Run\Vmixtnq = "\"C:\\Users\\Admin\\AppData\\Roaming\\Bdwbnqqn\\Vmixtnq.exe\""	Erodo.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

Erodo.exe

description	pid	Process	procid_target
PID 2032 set thread context of 1680	2032	Erodo.exe	34

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

Processes:

timeout.exe

pid	Process
1968	timeout.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

powershell.exeErodo.exe

pid	Process
1540	powershell.exe
2032	Erodo.exe
2032	Erodo.exe
2032	Erodo.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

powershell.exeErodo.exe

description	pid	Process
Token: SeDebugPrivilege	1540	powershell.exe
Token: SeDebugPrivilege	2032	Erodo.exe

Suspicious use of WriteProcessMemory 25 IoCs

Processes:

Erodo.exepowershell.execmd.exe

description	pid	Process	procid_target
PID 2032 wrote to memory of 1540	2032	Erodo.exe	27
PID 2032 wrote to memory of 1540	2032	Erodo.exe	27
PID 2032 wrote to memory of 1540	2032	Erodo.exe	27
PID 2032 wrote to memory of 1540	2032	Erodo.exe	27
PID 1540 wrote to memory of 1944	1540	powershell.exe	29
PID 1540 wrote to memory of 1944	1540	powershell.exe	29
PID 1540 wrote to memory of 1944	1540	powershell.exe	29
PID 1540 wrote to memory of 1944	1540	powershell.exe	29
PID 1944 wrote to memory of 1968	1944	cmd.exe	30
PID 1944 wrote to memory of 1968	1944	cmd.exe	30
PID 1944 wrote to memory of 1968	1944	cmd.exe	30
PID 1944 wrote to memory of 1968	1944	cmd.exe	30
PID 2032 wrote to memory of 384	2032	Erodo.exe	33
PID 2032 wrote to memory of 384	2032	Erodo.exe	33
PID 2032 wrote to memory of 384	2032	Erodo.exe	33
PID 2032 wrote to memory of 384	2032	Erodo.exe	33
PID 2032 wrote to memory of 1680	2032	Erodo.exe	34
PID 2032 wrote to memory of 1680	2032	Erodo.exe	34
PID 2032 wrote to memory of 1680	2032	Erodo.exe	34
PID 2032 wrote to memory of 1680	2032	Erodo.exe	34
PID 2032 wrote to memory of 1680	2032	Erodo.exe	34
PID 2032 wrote to memory of 1680	2032	Erodo.exe	34
PID 2032 wrote to memory of 1680	2032	Erodo.exe	34
PID 2032 wrote to memory of 1680	2032	Erodo.exe	34
PID 2032 wrote to memory of 1680	2032	Erodo.exe	34

C:\Users\Admin\AppData\Local\Temp\Erodo.exe
"C:\Users\Admin\AppData\Local\Temp\Erodo.exe"
1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2032
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -enc YwBtAGQAIAAvAGMAIAB0AGkAbQBlAG8AdQB0ACAAMgAwAA==
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1540
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\system32\cmd.exe" /c timeout 20
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1944
  - - C:\Windows\SysWOW64\timeout.exe
      timeout 20
      4⤵
      Delays execution with timeout.exe
      PID:1968
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
  C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
  2⤵
  PID:384
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
  C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
  2⤵
  PID:1680

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

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/1540-58-0x0000000071C40000-0x00000000721EB000-memory.dmp

Filesize
5.7MB

Download
memory/1540-59-0x00000000023F0000-0x000000000303A000-memory.dmp

Filesize
12.3MB

Download
memory/1540-56-0x0000000000000000-mapping.dmp

Download
memory/1680-68-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/1680-69-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/1680-75-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/1680-73-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/1680-70-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/1680-71-0x000000000040C6BE-mapping.dmp

Download
memory/1680-66-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/1680-65-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/1944-60-0x0000000000000000-mapping.dmp

Download
memory/1968-61-0x0000000000000000-mapping.dmp

Download
memory/2032-64-0x0000000004840000-0x000000000488C000-memory.dmp

Filesize
304KB

Download
memory/2032-54-0x00000000002C0000-0x000000000031C000-memory.dmp

Filesize
368KB

Download
memory/2032-55-0x00000000761D1000-0x00000000761D3000-memory.dmp

Filesize
8KB

Download
memory/2032-63-0x0000000004100000-0x0000000004130000-memory.dmp

Filesize
192KB

Download
memory/2032-62-0x0000000004570000-0x00000000045BA000-memory.dmp

Filesize
296KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads