asyncrat | 6a7acd0370583f01bff43b579ad0d45f29eedf6f004e70c4b0e793f7ea6c0448

General

Target

A4A7054AC8B42E6B6F60CF3CFB91916C.exe
Size

47KB
MD5

a4a7054ac8b42e6b6f60cf3cfb91916c
SHA1

4c32f6e0052bd83bae5a0516291972fc653262ce
SHA256

6a7acd0370583f01bff43b579ad0d45f29eedf6f004e70c4b0e793f7ea6c0448
SHA512

6603572c46f0074857746e80d0d2a761312f7ccc5f55df6e1401f902a061d0375d298d23aabbfb93e02e19c655399e4916c4fcd6cd5da4dba661d6334277d11e
SSDEEP

768:vu6XdTvER+SWUk6P4mo2qb1xr8/uq76XPITGRDi00XU4b2Nk2Bn4mq/WMPfE3WBH:vu6XdTv2S2UxQuq79TGRD0Tb2Nk2imda

Score

10^/10

asyncrat xworm default discovery execution persistence rat trojan

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

C2

103.174.191.71:6606

103.174.191.71:7707

103.174.191.71:8808

Mutex

HFE2t0VQV50q

Attributes

delay
3
install
false
install_file
game.exe
install_folder
%AppData%

aes.plain

Extracted

Family

xworm

Version

5.0

C2

103.174.191.71:15320

Mutex

o17wbGuWOIUfMnXn

Attributes

Install_directory
%Temp%
install_file
anti.exe

aes.plain

Signatures

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

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral1/files/0x000c0000000120fd-42.dat	family_xworm
behavioral1/memory/2428-44-0x0000000000DE0000-0x0000000000DF4000-memory.dmp	family_xworm

Xworm
Xworm is a remote access trojan written in C#.
trojan rat xworm

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\anti.lnk	lcaxmu.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\anti.lnk	lcaxmu.exe

Executes dropped EXE 1 IoCs

pid	Process
2428	lcaxmu.exe

Loads dropped DLL 1 IoCs

pid	Process
1752	powershell.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2257386474-3982792636-3902186748-1000\Software\Microsoft\Windows\CurrentVersion\Run\anti = "C:\\Users\\Admin\\AppData\\Local\\Temp\\anti.exe"	lcaxmu.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Start PowerShell.

execution

PowerShell

T1059.001

pid	Process
1752	powershell.exe

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 3 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

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	A4A7054AC8B42E6B6F60CF3CFB91916C.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1752	powershell.exe
1752	powershell.exe
1752	powershell.exe
1816	A4A7054AC8B42E6B6F60CF3CFB91916C.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	1816	A4A7054AC8B42E6B6F60CF3CFB91916C.exe
Token: SeDebugPrivilege	1816	A4A7054AC8B42E6B6F60CF3CFB91916C.exe
Token: SeDebugPrivilege	1752	powershell.exe
Token: SeDebugPrivilege	2428	lcaxmu.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 1816 wrote to memory of 2900	1816	A4A7054AC8B42E6B6F60CF3CFB91916C.exe	31
PID 1816 wrote to memory of 2900	1816	A4A7054AC8B42E6B6F60CF3CFB91916C.exe	31
PID 1816 wrote to memory of 2900	1816	A4A7054AC8B42E6B6F60CF3CFB91916C.exe	31
PID 1816 wrote to memory of 2900	1816	A4A7054AC8B42E6B6F60CF3CFB91916C.exe	31
PID 2900 wrote to memory of 1752	2900	cmd.exe	33
PID 2900 wrote to memory of 1752	2900	cmd.exe	33
PID 2900 wrote to memory of 1752	2900	cmd.exe	33
PID 2900 wrote to memory of 1752	2900	cmd.exe	33
PID 1752 wrote to memory of 2428	1752	powershell.exe	34
PID 1752 wrote to memory of 2428	1752	powershell.exe	34
PID 1752 wrote to memory of 2428	1752	powershell.exe	34
PID 1752 wrote to memory of 2428	1752	powershell.exe	34

C:\Users\Admin\AppData\Local\Temp\A4A7054AC8B42E6B6F60CF3CFB91916C.exe
"C:\Users\Admin\AppData\Local\Temp\A4A7054AC8B42E6B6F60CF3CFB91916C.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1816
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c start /b powershell –ExecutionPolicy Bypass Start-Process -FilePath '"C:\Users\Admin\AppData\Local\Temp\lcaxmu.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2900
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    powershell –ExecutionPolicy Bypass Start-Process -FilePath '"C:\Users\Admin\AppData\Local\Temp\lcaxmu.exe"'
    3⤵
    - Loads dropped DLL
    - Command and Scripting Interpreter: PowerShell
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:1752
  - - C:\Users\Admin\AppData\Local\Temp\lcaxmu.exe
      "C:\Users\Admin\AppData\Local\Temp\lcaxmu.exe"
      4⤵
      Drops startup file
      Executes dropped EXE
      Adds Run key to start application
      Suspicious use of AdjustPrivilegeToken
      PID:2428

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

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 Information Discovery

1

T1082

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\Cab5F9F.tmp

Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

Download Submit
C:\Users\Admin\AppData\Local\Temp\Tar76DA.tmp

Filesize
181KB

MD5
4ea6026cf93ec6338144661bf1202cd1

SHA1
a1dec9044f750ad887935a01430bf49322fbdcb7

SHA256
8efbc21559ef8b1bcf526800d8070baad42474ce7198e26fa771dbb41a76b1d8

SHA512
6c7e0980e39aacf4c3689802353f464a08cd17753bd210ee997e5f2a455deb4f287a9ef74d84579dbde49bc96213cd2b8b247723919c412ea980aa6e6bfe218b

Download Submit
\Users\Admin\AppData\Local\Temp\lcaxmu.exe

Filesize
49KB

MD5
cd86c2933636bea72d49595aeb34c33a

SHA1
5919319fb99ab578df62059cbe78a52174bab1c6

SHA256
489d1b618cf7c3d24ff0926bc53738a1496bede40806d42acac75f95fc949e71

SHA512
4944df3e13d1f7b10b2a6dcf538121e4b4a5108a0f3ae60687db35baba97029f817691487658b49e333becb6d77e07e635c978f4971b138872a3487f06dcc7a0

Download Submit
memory/1816-0-0x000000007465E000-0x000000007465F000-memory.dmp

Filesize
4KB

Download
memory/1816-1-0x00000000009B0000-0x00000000009C2000-memory.dmp

Filesize
72KB

Download
memory/1816-2-0x0000000074650000-0x0000000074D3E000-memory.dmp

Filesize
6.9MB

Download
memory/1816-19-0x0000000000660000-0x000000000066C000-memory.dmp

Filesize
48KB

Download
memory/1816-49-0x000000007465E000-0x000000007465F000-memory.dmp

Filesize
4KB

Download
memory/1816-50-0x0000000074650000-0x0000000074D3E000-memory.dmp

Filesize
6.9MB

Download
memory/2428-44-0x0000000000DE0000-0x0000000000DF4000-memory.dmp

Filesize
80KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads