asyncrat | 7d739906ed3602a3617329cf9a8c314c4bf0cb898923e53137d6b25b2e3e4595

General

Target

injection.exe
Size

264KB
MD5

a0051fa6f5190c984a269d026a47e7b4
SHA1

380cbbddfcac3fb22bd78f60bf8445f1f1634b94
SHA256

7d739906ed3602a3617329cf9a8c314c4bf0cb898923e53137d6b25b2e3e4595
SHA512

4cc10e504d5351fae69e3a918a9fd4386e10f3e73723ad84989e2fe23ac32fb3e60bfd3a6e777e7bc17f448331393774e31570596ca270307f0d7a250e00d1e0
SSDEEP

3072:Vj+C7lQ52Mrb/x5xrzQdUJ+fYy8xDVY6OVfNoteAPEHBAnpK37nXx8b0uaQ7nlPt:V77MrvxAdU+IFXOOev8tDlPOvXzx1a

Score

10^/10

asyncrat default execution rat

Malware Config

Extracted

Family

asyncrat

Version

Venom RAT + HVNC + Stealer + Grabber v6.0.3

Botnet

Default

Mutex

lfrlrahocljxyqyr

Attributes

delay
1
install
false
install_folder
%AppData%
pastebin_config
https://pastebin.com/raw/xFvrV0SD

aes.plain

Signatures

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

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral2/memory/4224-37-0x00000000023B0000-0x00000000023C8000-memory.dmp	family_asyncrat

Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
2996	powershell.exe
1368	powershell.exe

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-1-5-21-3756129449-3121373848-4276368241-1000\Control Panel\International\Geo\Nation	injection.exe

Executes dropped EXE 1 IoCs

pid	Process
4224	SearchApp.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
13	pastebin.com
14	pastebin.com

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
2996	powershell.exe
2996	powershell.exe
1368	powershell.exe
1368	powershell.exe
4224	SearchApp.exe
4224	SearchApp.exe
4224	SearchApp.exe
4224	SearchApp.exe
4224	SearchApp.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	2988	injection.exe
Token: SeDebugPrivilege	2996	powershell.exe
Token: SeDebugPrivilege	1368	powershell.exe
Token: SeDebugPrivilege	4224	SearchApp.exe
Token: SeDebugPrivilege	4224	SearchApp.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4224	SearchApp.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2988 wrote to memory of 2996	2988	injection.exe	82
PID 2988 wrote to memory of 2996	2988	injection.exe	82
PID 2988 wrote to memory of 1368	2988	injection.exe	84
PID 2988 wrote to memory of 1368	2988	injection.exe	84

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\injection.exe
"C:\Users\Admin\AppData\Local\Temp\injection.exe"
1⤵
- Checks computer location settings
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2988
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Roaming\SearchApp.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2996
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'SearchApp.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1368

C:\Users\Admin\AppData\Roaming\SearchApp.exe
C:\Users\Admin\AppData\Roaming\SearchApp.exe
1⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
PID:4224

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

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

Filesize
2KB

MD5
d85ba6ff808d9e5444a4b369f5bc2730

SHA1
31aa9d96590fff6981b315e0b391b575e4c0804a

SHA256
84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

SHA512
8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
77d622bb1a5b250869a3238b9bc1402b

SHA1
d47f4003c2554b9dfc4c16f22460b331886b191b

SHA256
f97ff12a8abf4bf88bb6497bd2ac2da12628c8847a8ba5a9026bdbb76507cdfb

SHA512
d6789b5499f23c9035375a102271e17a8a82e57d6f5312fa24242e08a83efdeb8becb7622f55c4cf1b89c7d864b445df11f4d994cf7e2f87a900535bcca12fd9

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_bily15wj.ogo.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Roaming\SearchApp.exe

Filesize
264KB

MD5
a0051fa6f5190c984a269d026a47e7b4

SHA1
380cbbddfcac3fb22bd78f60bf8445f1f1634b94

SHA256
7d739906ed3602a3617329cf9a8c314c4bf0cb898923e53137d6b25b2e3e4595

SHA512
4cc10e504d5351fae69e3a918a9fd4386e10f3e73723ad84989e2fe23ac32fb3e60bfd3a6e777e7bc17f448331393774e31570596ca270307f0d7a250e00d1e0

Download Submit
memory/2988-0-0x00007FFCD91D3000-0x00007FFCD91D5000-memory.dmp

Filesize
8KB

Download
memory/2988-1-0x0000000000EA0000-0x0000000000EE8000-memory.dmp

Filesize
288KB

Download
memory/2988-32-0x00007FFCD91D0000-0x00007FFCD9C91000-memory.dmp

Filesize
10.8MB

Download
memory/2988-36-0x00007FFCD91D0000-0x00007FFCD9C91000-memory.dmp

Filesize
10.8MB

Download
memory/2996-12-0x00007FFCD91D0000-0x00007FFCD9C91000-memory.dmp

Filesize
10.8MB

Download
memory/2996-13-0x00007FFCD91D0000-0x00007FFCD9C91000-memory.dmp

Filesize
10.8MB

Download
memory/2996-14-0x00007FFCD91D0000-0x00007FFCD9C91000-memory.dmp

Filesize
10.8MB

Download
memory/2996-17-0x00007FFCD91D0000-0x00007FFCD9C91000-memory.dmp

Filesize
10.8MB

Download
memory/2996-8-0x000001B3B6C60000-0x000001B3B6C82000-memory.dmp

Filesize
136KB

Download
memory/4224-37-0x00000000023B0000-0x00000000023C8000-memory.dmp

Filesize
96KB

Download

Analysis

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