asyncrat | e8594a68a1b573d8cec8418bb410be8d8e3d3cec1017130640dd5aab770059ad

Analysis

max time kernel
33s
max time network
147s
platform
windows7_x64
resource
win7-20240704-en
resource tags

arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-x64system
submitted
03-08-2024 03:25

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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

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
behavioral1/files/0x0006000000018f8e-35.dat	family_asyncrat

Executes dropped EXE 2 IoCs

pid	Process
2808	SET-UP.EXE
2640	SETUGP.EXE.EXE

Loads dropped DLL 2 IoCs

pid	Process
2928	RegAsm.exe
2928	RegAsm.exe

UPX packed file 8 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2928-14-0x0000000000400000-0x000000000042E000-memory.dmp	upx
behavioral1/memory/2928-12-0x0000000000400000-0x000000000042E000-memory.dmp	upx
behavioral1/memory/2928-18-0x0000000000400000-0x000000000042E000-memory.dmp	upx
behavioral1/memory/2928-17-0x0000000000400000-0x000000000042E000-memory.dmp	upx
behavioral1/memory/2928-16-0x0000000000400000-0x000000000042E000-memory.dmp	upx
behavioral1/memory/2928-8-0x0000000000400000-0x000000000042E000-memory.dmp	upx
behavioral1/memory/2928-9-0x0000000000400000-0x000000000042E000-memory.dmp	upx
behavioral1/memory/2928-34-0x0000000000400000-0x000000000042E000-memory.dmp	upx

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
2880	powershell.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2276 set thread context of 2928	2276	111aa30a320d763f875d21e66345c86e8580ccbe0d50e99733991caff1d2201b.exe	33

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	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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	111aa30a320d763f875d21e66345c86e8580ccbe0d50e99733991caff1d2201b.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2276	111aa30a320d763f875d21e66345c86e8580ccbe0d50e99733991caff1d2201b.exe
2276	111aa30a320d763f875d21e66345c86e8580ccbe0d50e99733991caff1d2201b.exe
2880	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2276	111aa30a320d763f875d21e66345c86e8580ccbe0d50e99733991caff1d2201b.exe
Token: SeDebugPrivilege	2880	powershell.exe
Token: SeDebugPrivilege	2640	SETUGP.EXE.EXE

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2276 wrote to memory of 2880	2276	111aa30a320d763f875d21e66345c86e8580ccbe0d50e99733991caff1d2201b.exe	30
PID 2276 wrote to memory of 2880	2276	111aa30a320d763f875d21e66345c86e8580ccbe0d50e99733991caff1d2201b.exe	30
PID 2276 wrote to memory of 2880	2276	111aa30a320d763f875d21e66345c86e8580ccbe0d50e99733991caff1d2201b.exe	30
PID 2276 wrote to memory of 2880	2276	111aa30a320d763f875d21e66345c86e8580ccbe0d50e99733991caff1d2201b.exe	30
PID 2276 wrote to memory of 2744	2276	111aa30a320d763f875d21e66345c86e8580ccbe0d50e99733991caff1d2201b.exe	32
PID 2276 wrote to memory of 2744	2276	111aa30a320d763f875d21e66345c86e8580ccbe0d50e99733991caff1d2201b.exe	32
PID 2276 wrote to memory of 2744	2276	111aa30a320d763f875d21e66345c86e8580ccbe0d50e99733991caff1d2201b.exe	32
PID 2276 wrote to memory of 2744	2276	111aa30a320d763f875d21e66345c86e8580ccbe0d50e99733991caff1d2201b.exe	32
PID 2276 wrote to memory of 2744	2276	111aa30a320d763f875d21e66345c86e8580ccbe0d50e99733991caff1d2201b.exe	32
PID 2276 wrote to memory of 2744	2276	111aa30a320d763f875d21e66345c86e8580ccbe0d50e99733991caff1d2201b.exe	32
PID 2276 wrote to memory of 2744	2276	111aa30a320d763f875d21e66345c86e8580ccbe0d50e99733991caff1d2201b.exe	32
PID 2276 wrote to memory of 2928	2276	111aa30a320d763f875d21e66345c86e8580ccbe0d50e99733991caff1d2201b.exe	33
PID 2276 wrote to memory of 2928	2276	111aa30a320d763f875d21e66345c86e8580ccbe0d50e99733991caff1d2201b.exe	33
PID 2276 wrote to memory of 2928	2276	111aa30a320d763f875d21e66345c86e8580ccbe0d50e99733991caff1d2201b.exe	33
PID 2276 wrote to memory of 2928	2276	111aa30a320d763f875d21e66345c86e8580ccbe0d50e99733991caff1d2201b.exe	33
PID 2276 wrote to memory of 2928	2276	111aa30a320d763f875d21e66345c86e8580ccbe0d50e99733991caff1d2201b.exe	33
PID 2276 wrote to memory of 2928	2276	111aa30a320d763f875d21e66345c86e8580ccbe0d50e99733991caff1d2201b.exe	33
PID 2276 wrote to memory of 2928	2276	111aa30a320d763f875d21e66345c86e8580ccbe0d50e99733991caff1d2201b.exe	33
PID 2276 wrote to memory of 2928	2276	111aa30a320d763f875d21e66345c86e8580ccbe0d50e99733991caff1d2201b.exe	33
PID 2276 wrote to memory of 2928	2276	111aa30a320d763f875d21e66345c86e8580ccbe0d50e99733991caff1d2201b.exe	33
PID 2276 wrote to memory of 2928	2276	111aa30a320d763f875d21e66345c86e8580ccbe0d50e99733991caff1d2201b.exe	33
PID 2276 wrote to memory of 2928	2276	111aa30a320d763f875d21e66345c86e8580ccbe0d50e99733991caff1d2201b.exe	33
PID 2928 wrote to memory of 2808	2928	RegAsm.exe	34
PID 2928 wrote to memory of 2808	2928	RegAsm.exe	34
PID 2928 wrote to memory of 2808	2928	RegAsm.exe	34
PID 2928 wrote to memory of 2808	2928	RegAsm.exe	34
PID 2928 wrote to memory of 2640	2928	RegAsm.exe	35
PID 2928 wrote to memory of 2640	2928	RegAsm.exe	35
PID 2928 wrote to memory of 2640	2928	RegAsm.exe	35
PID 2928 wrote to memory of 2640	2928	RegAsm.exe	35

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 behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2276
- 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:2880
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
  2⤵
  PID:2744
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2928
- - 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:2808
- - 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:2640

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\Cab6106.tmp

Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

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/2276-22-0x0000000073ED0000-0x00000000745BE000-memory.dmp

Filesize
6.9MB

Download
memory/2276-0-0x0000000073EDE000-0x0000000073EDF000-memory.dmp

Filesize
4KB

Download
memory/2276-5-0x0000000000450000-0x0000000000468000-memory.dmp

Filesize
96KB

Download
memory/2276-1-0x0000000000A40000-0x0000000000A5A000-memory.dmp

Filesize
104KB

Download
memory/2276-4-0x0000000073ED0000-0x00000000745BE000-memory.dmp

Filesize
6.9MB

Download
memory/2276-2-0x0000000073ED0000-0x00000000745BE000-memory.dmp

Filesize
6.9MB

Download
memory/2276-3-0x0000000073EDE000-0x0000000073EDF000-memory.dmp

Filesize
4KB

Download
memory/2640-36-0x00000000003A0000-0x00000000003B2000-memory.dmp

Filesize
72KB

Download
memory/2928-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2928-8-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/2928-7-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/2928-9-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/2928-16-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/2928-17-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/2928-18-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/2928-34-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/2928-12-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/2928-14-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download