asyncrat | 111aa30a320d763f875d21e66345c86e8580ccbe0d50e99733991caff1d2201b

General

Target

111aa30a320d763f875d21e66345c86e8580ccbe0d50e99733991caff1d2201b.exe
Size

78KB
MD5

b7f0467ea05cdb14eea0f67fd09e8bc6
SHA1

231ee0739e614251bc3d648885c77f6f8d0cbd58
SHA256

111aa30a320d763f875d21e66345c86e8580ccbe0d50e99733991caff1d2201b
SHA512

21fb8ab40f31987ebf977983012035d29034471c0f84779a636857e9a52110856155bc6ead9ac2e34dc29cbdee82c98941e4eafa4c7f73dac01b65b76c26ac97
SSDEEP

1536:d6zKpOqlUTuWJR5UpJN6almL4REvOWTt0BO5FHBas9hhQ0YH:0zOOqeSQLUpJNflJEWWp0Q5z59hm7H

Score

10^/10

asyncrat default discovery execution rat upx

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

127.0.0.1:6606

127.0.0.1:7707

127.0.0.1:8808

parsher.ddnsfree.com:6606

parsher.ddnsfree.com:7707

parsher.ddnsfree.com:8808

Mutex

fakET5WLXUHP

Attributes

delay
3
install
false
install_file
System32.exe
install_folder
%AppData%

aes.plain

Signatures

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

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral2/files/0x000400000001e0c4-48.dat	family_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-1-5-21-807826884-2440573969-3755798217-1000\Control Panel\International\Geo\Nation	RegAsm.exe

Executes dropped EXE 2 IoCs

pid	Process
4700	SET-UP.EXE
232	SETUGP.EXE.EXE

UPX packed file 5 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/60-12-0x0000000000400000-0x000000000042E000-memory.dmp	upx
behavioral2/memory/60-16-0x0000000000400000-0x000000000042E000-memory.dmp	upx
behavioral2/memory/60-15-0x0000000000400000-0x000000000042E000-memory.dmp	upx
behavioral2/memory/60-19-0x0000000000400000-0x000000000042E000-memory.dmp	upx
behavioral2/memory/60-56-0x0000000000400000-0x000000000042E000-memory.dmp	upx

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
1648	powershell.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4304 set thread context of 60	4304	111aa30a320d763f875d21e66345c86e8580ccbe0d50e99733991caff1d2201b.exe	88

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 5 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	111aa30a320d763f875d21e66345c86e8580ccbe0d50e99733991caff1d2201b.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegAsm.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	SET-UP.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	SETUGP.EXE.EXE

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1648	powershell.exe
1648	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1648	powershell.exe
Token: SeDebugPrivilege	232	SETUGP.EXE.EXE

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 4304 wrote to memory of 1648	4304	111aa30a320d763f875d21e66345c86e8580ccbe0d50e99733991caff1d2201b.exe	86
PID 4304 wrote to memory of 1648	4304	111aa30a320d763f875d21e66345c86e8580ccbe0d50e99733991caff1d2201b.exe	86
PID 4304 wrote to memory of 1648	4304	111aa30a320d763f875d21e66345c86e8580ccbe0d50e99733991caff1d2201b.exe	86
PID 4304 wrote to memory of 60	4304	111aa30a320d763f875d21e66345c86e8580ccbe0d50e99733991caff1d2201b.exe	88
PID 4304 wrote to memory of 60	4304	111aa30a320d763f875d21e66345c86e8580ccbe0d50e99733991caff1d2201b.exe	88
PID 4304 wrote to memory of 60	4304	111aa30a320d763f875d21e66345c86e8580ccbe0d50e99733991caff1d2201b.exe	88
PID 4304 wrote to memory of 60	4304	111aa30a320d763f875d21e66345c86e8580ccbe0d50e99733991caff1d2201b.exe	88
PID 4304 wrote to memory of 60	4304	111aa30a320d763f875d21e66345c86e8580ccbe0d50e99733991caff1d2201b.exe	88
PID 4304 wrote to memory of 60	4304	111aa30a320d763f875d21e66345c86e8580ccbe0d50e99733991caff1d2201b.exe	88
PID 4304 wrote to memory of 60	4304	111aa30a320d763f875d21e66345c86e8580ccbe0d50e99733991caff1d2201b.exe	88
PID 60 wrote to memory of 4700	60	RegAsm.exe	89
PID 60 wrote to memory of 4700	60	RegAsm.exe	89
PID 60 wrote to memory of 4700	60	RegAsm.exe	89
PID 60 wrote to memory of 232	60	RegAsm.exe	90
PID 60 wrote to memory of 232	60	RegAsm.exe	90
PID 60 wrote to memory of 232	60	RegAsm.exe	90

C:\Users\Admin\AppData\Local\Temp\111aa30a320d763f875d21e66345c86e8580ccbe0d50e99733991caff1d2201b.exe
"C:\Users\Admin\AppData\Local\Temp\111aa30a320d763f875d21e66345c86e8580ccbe0d50e99733991caff1d2201b.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4304
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Remove-ItemProperty -Path 'HKCU:\SOFTWARE\Microsoft\Windows\CurrentVersion\Run' -Name '';New-ItemProperty -Path 'HKCU:\SOFTWARE\Microsoft\Windows\CurrentVersion\Run' -Name '' -Value '"C:\Users\Admin\AppData\Roaming\.exe"' -PropertyType 'String'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1648
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
  2⤵
  - Checks computer location settings
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:60
- - C:\Users\Admin\AppData\Roaming\SET-UP.EXE
    "C:\Users\Admin\AppData\Roaming\SET-UP.EXE"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:4700
- - C:\Users\Admin\AppData\Roaming\SETUGP.EXE.EXE
    "C:\Users\Admin\AppData\Roaming\SETUGP.EXE.EXE"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:232

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_byqjllft.yik.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Roaming\SET-UP.EXE

Filesize
53KB

MD5
098062dde5741b0b42e73060a1b95db0

SHA1
803e9fd3f740cfebb06333a7e056e6b6dbdc10d1

SHA256
63e2cb9d0bfc79659e24fb3b119b249691dc79c5da7c42f7e79a9dcdd8ccd611

SHA512
69a18ec7f7fc8e49c2ef9f0ffc62020bd603f6874ecf6cc2c16351aaddad4a3ef37a7575c6f44065aa1cf606d2ad85275a003105cbe4527d9a9b035d6bfd678a

Download Submit
C:\Users\Admin\AppData\Roaming\SETUGP.EXE.EXE

Filesize
45KB

MD5
09bc60ead95b7741e734741f8fb8a11a

SHA1
92a543c0091d6284022faa50314bb0bac7b58489

SHA256
a069e19a43489131c37a99f2c8eae8c53397b5e6a8e4f8b80fbec5c93556c419

SHA512
625a3ea7b9cd4b95ee6325bcaefb94f7af8c7f1af2c1a2e41f782c6e35a41aea4ee50a09b5a6a7d8b47e3c6ad2a37d90f60a7ec4ac75e331e61f5fe829b7d991

Download Submit
memory/60-12-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/60-56-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/60-19-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/60-15-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/60-16-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/232-66-0x0000000005460000-0x00000000054FC000-memory.dmp

Filesize
624KB

Download
memory/232-55-0x00000000007F0000-0x0000000000802000-memory.dmp

Filesize
72KB

Download
memory/1648-22-0x0000000005A50000-0x0000000006078000-memory.dmp

Filesize
6.2MB

Download
memory/1648-57-0x00000000067D0000-0x00000000067EE000-memory.dmp

Filesize
120KB

Download
memory/1648-64-0x0000000074D10000-0x00000000754C0000-memory.dmp

Filesize
7.7MB

Download
memory/1648-65-0x00000000003A0000-0x000000000040D000-memory.dmp

Filesize
436KB

Download
memory/1648-60-0x0000000006CA0000-0x0000000006CBA000-memory.dmp

Filesize
104KB

Download
memory/1648-18-0x0000000074D10000-0x00000000754C0000-memory.dmp

Filesize
7.7MB

Download
memory/1648-21-0x00000000003A0000-0x000000000040D000-memory.dmp

Filesize
436KB

Download
memory/1648-20-0x0000000002EA0000-0x0000000002ED6000-memory.dmp

Filesize
216KB

Download
memory/1648-61-0x0000000006CF0000-0x0000000006D12000-memory.dmp

Filesize
136KB

Download
memory/1648-59-0x00000000077B0000-0x0000000007846000-memory.dmp

Filesize
600KB

Download
memory/1648-24-0x0000000005900000-0x0000000005922000-memory.dmp

Filesize
136KB

Download
memory/1648-25-0x00000000060F0000-0x0000000006156000-memory.dmp

Filesize
408KB

Download
memory/1648-26-0x0000000006160000-0x00000000061C6000-memory.dmp

Filesize
408KB

Download
memory/1648-58-0x0000000006860000-0x00000000068AC000-memory.dmp

Filesize
304KB

Download
memory/1648-33-0x00000000061D0000-0x0000000006524000-memory.dmp

Filesize
3.3MB

Download
memory/4304-5-0x0000000074D10000-0x00000000754C0000-memory.dmp

Filesize
7.7MB

Download
memory/4304-6-0x0000000005430000-0x00000000054A6000-memory.dmp

Filesize
472KB

Download
memory/4304-3-0x00000000051C0000-0x0000000005252000-memory.dmp

Filesize
584KB

Download
memory/4304-2-0x0000000005770000-0x0000000005D14000-memory.dmp

Filesize
5.6MB

Download
memory/4304-10-0x0000000005400000-0x000000000541E000-memory.dmp

Filesize
120KB

Download
memory/4304-4-0x0000000005170000-0x000000000517A000-memory.dmp

Filesize
40KB

Download
memory/4304-23-0x0000000074D10000-0x00000000754C0000-memory.dmp

Filesize
7.7MB

Download
memory/4304-0-0x0000000074D1E000-0x0000000074D1F000-memory.dmp

Filesize
4KB

Download
memory/4304-7-0x0000000074D1E000-0x0000000074D1F000-memory.dmp

Filesize
4KB

Download
memory/4304-8-0x0000000074D10000-0x00000000754C0000-memory.dmp

Filesize
7.7MB

Download
memory/4304-9-0x0000000005190000-0x00000000051A8000-memory.dmp

Filesize
96KB

Download
memory/4304-1-0x0000000000760000-0x000000000077A000-memory.dmp

Filesize
104KB

Download

Analysis

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