asyncrat | 8b5773001a13cd82f47b129c4673c2fdfe9a19852825a72b1231f6333cd22951

Analysis

max time kernel
295s
max time network
294s
platform
windows10-2004_x64
resource
win10v2004-20240709-en
resource tags

arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
submitted
13-07-2024 19:06

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General

Target

Venom RAT + Stealer + HVNC.exe
Size

14.3MB
MD5

d9a91babacaf65923e28841d7995b80c
SHA1

57df4208c6a87ef881cf2021a1ad431a21456248
SHA256

8b5773001a13cd82f47b129c4673c2fdfe9a19852825a72b1231f6333cd22951
SHA512

6e0eb14b2a14d35884dd6d4505ea78d28ae6cee6ec59cabcb9a2499f63539d217196d7afca7b8e299ca8c9b447218f421c5372ebbd0167fbe2d803c68125c6bc
SSDEEP

393216:w2CdPoVETWa1Z4c80Gz/e5Yyb0Pn1a7kIGvZscp1Ae8A:wWIWa1acPGC5Yyb0PnikXZ1p198

Score

10^/10

asyncrat xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

Version

3.0

147.185.221.20:49485

Attributes

Install_directory
%Public%
install_file
RtkAudUService32.exe

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
behavioral2/files/0x00090000000233f5-13.dat	family_xworm
behavioral2/memory/4844-15-0x0000000000CF0000-0x0000000000D0A000-memory.dmp	family_xworm

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

Command and Scripting Interpreter: PowerShell 1 TTPs 3 IoCs

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

execution

PowerShell

T1059.001

pid	Process
2460	powershell.exe
3544	powershell.exe
4364	powershell.exe

Checks computer location settings 2 TTPs 2 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-1-5-21-1705699165-553239100-4129523827-1000\Control Panel\International\Geo\Nation	Venom RAT + Stealer + HVNC.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1705699165-553239100-4129523827-1000\Control Panel\International\Geo\Nation	System.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 10 IoCs

pid	Process
4844	System.exe
1016	Venom RAT + HVNC + Stealer + Grabber.exe
4908	System.exe
1016	System.exe
2692	System.exe
4944	System.exe
3152	ngrok.exe
4768	ngrok.exe
2952	ngrok.exe
4432	System.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-1-5-21-1705699165-553239100-4129523827-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\System = "C:\\Users\\Public\\System.exe"	System.exe

Looks up external IP address via web service 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
13	ip-api.com

Drops file in Windows directory 1 IoCs

description	ioc	Process
File created	C:\Windows\System.exe	Venom RAT + Stealer + HVNC.exe

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

System Information Discovery
T1082

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2592	timeout.exe

Kills process with taskkill 3 IoCs

evasion

pid	Process
2676	taskkill.exe
2408	taskkill.exe
4868	taskkill.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
1228	schtasks.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
4844	System.exe

Suspicious behavior: EnumeratesProcesses 19 IoCs

pid	Process
4364	powershell.exe
4364	powershell.exe
2460	powershell.exe
2460	powershell.exe
3544	powershell.exe
3544	powershell.exe
4844	System.exe
3152	ngrok.exe
3152	ngrok.exe
3152	ngrok.exe
3152	ngrok.exe
4768	ngrok.exe
4768	ngrok.exe
4768	ngrok.exe
4768	ngrok.exe
2952	ngrok.exe
2952	ngrok.exe
2952	ngrok.exe
2952	ngrok.exe

Suspicious use of AdjustPrivilegeToken 13 IoCs

description	pid	Process
Token: SeDebugPrivilege	4844	System.exe
Token: SeDebugPrivilege	4364	powershell.exe
Token: SeDebugPrivilege	2460	powershell.exe
Token: SeDebugPrivilege	3544	powershell.exe
Token: SeDebugPrivilege	4844	System.exe
Token: SeDebugPrivilege	4908	System.exe
Token: SeDebugPrivilege	1016	System.exe
Token: SeDebugPrivilege	2692	System.exe
Token: SeDebugPrivilege	4944	System.exe
Token: SeDebugPrivilege	2676	taskkill.exe
Token: SeDebugPrivilege	2408	taskkill.exe
Token: SeDebugPrivilege	4868	taskkill.exe
Token: SeDebugPrivilege	4432	System.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4844	System.exe

Suspicious use of WriteProcessMemory 33 IoCs

description	pid	Process	procid_target
PID 4412 wrote to memory of 4844	4412	Venom RAT + Stealer + HVNC.exe	85
PID 4412 wrote to memory of 4844	4412	Venom RAT + Stealer + HVNC.exe	85
PID 4412 wrote to memory of 1016	4412	Venom RAT + Stealer + HVNC.exe	87
PID 4412 wrote to memory of 1016	4412	Venom RAT + Stealer + HVNC.exe	87
PID 4844 wrote to memory of 4364	4844	System.exe	92
PID 4844 wrote to memory of 4364	4844	System.exe	92
PID 4844 wrote to memory of 2460	4844	System.exe	94
PID 4844 wrote to memory of 2460	4844	System.exe	94
PID 4844 wrote to memory of 3544	4844	System.exe	96
PID 4844 wrote to memory of 3544	4844	System.exe	96
PID 4844 wrote to memory of 1228	4844	System.exe	98
PID 4844 wrote to memory of 1228	4844	System.exe	98
PID 4844 wrote to memory of 2676	4844	System.exe	106
PID 4844 wrote to memory of 2676	4844	System.exe	106
PID 4844 wrote to memory of 3152	4844	System.exe	109
PID 4844 wrote to memory of 3152	4844	System.exe	109
PID 4844 wrote to memory of 3152	4844	System.exe	109
PID 4844 wrote to memory of 2408	4844	System.exe	111
PID 4844 wrote to memory of 2408	4844	System.exe	111
PID 4844 wrote to memory of 4768	4844	System.exe	113
PID 4844 wrote to memory of 4768	4844	System.exe	113
PID 4844 wrote to memory of 4768	4844	System.exe	113
PID 4844 wrote to memory of 4868	4844	System.exe	115
PID 4844 wrote to memory of 4868	4844	System.exe	115
PID 4844 wrote to memory of 2952	4844	System.exe	117
PID 4844 wrote to memory of 2952	4844	System.exe	117
PID 4844 wrote to memory of 2952	4844	System.exe	117
PID 4844 wrote to memory of 2784	4844	System.exe	120
PID 4844 wrote to memory of 2784	4844	System.exe	120
PID 4844 wrote to memory of 1872	4844	System.exe	122
PID 4844 wrote to memory of 1872	4844	System.exe	122
PID 1872 wrote to memory of 2592	1872	cmd.exe	124
PID 1872 wrote to memory of 2592	1872	cmd.exe	124

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\Venom RAT + Stealer + HVNC.exe
"C:\Users\Admin\AppData\Local\Temp\Venom RAT + Stealer + HVNC.exe"
1⤵
- Checks computer location settings
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:4412
- C:\Windows\System.exe
  "C:\Windows\System.exe"
  2⤵
  - Checks computer location settings
  - Drops startup file
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious behavior: AddClipboardFormatListener
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4844
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Windows\System.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4364
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'System.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2460
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Public\System.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:3544
- - C:\Windows\System32\schtasks.exe
    "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "System" /tr "C:\Users\Public\System.exe"
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:1228
- - C:\Windows\System32\taskkill.exe
    "C:\Windows\System32\taskkill.exe" /im ngrok.exe /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:2676
- - C:\Users\Admin\AppData\Local\Temp\ngrok.exe
    C:\Users\Admin\AppData\Local\Temp\ngrok.exe config add-authtoken 2de1vjfbhkIf8u2KTB3aNDqCqDw_59TGvKSA8VjcZZgKgDVQR
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    PID:3152
- - C:\Windows\System32\taskkill.exe
    "C:\Windows\System32\taskkill.exe" /im ngrok.exe /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:2408
- - C:\Users\Admin\AppData\Local\Temp\ngrok.exe
    C:\Users\Admin\AppData\Local\Temp\ngrok.exe config add-authtoken 2de1vjfbhkIf8u2KTB3aNDqCqDw_59TGvKSA8VjcZZgKgDVQR
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    PID:4768
- - C:\Windows\System32\taskkill.exe
    "C:\Windows\System32\taskkill.exe" /im ngrok.exe /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:4868
- - C:\Users\Admin\AppData\Local\Temp\ngrok.exe
    C:\Users\Admin\AppData\Local\Temp\ngrok.exe config add-authtoken 2de1vjfbhkIf8u2KTB3aNDqCqDw_59TGvKSA8VjcZZgKgDVQR
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    PID:2952
- - C:\Windows\System32\schtasks.exe
    "C:\Windows\System32\schtasks.exe" /delete /f /tn "System"
    3⤵
    PID:2784
- - C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp1072.tmp.bat""
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1872
  - - C:\Windows\system32\timeout.exe
      timeout 3
      4⤵
      Delays execution with timeout.exe
      PID:2592
- C:\Users\Admin\AppData\Local\Temp\Venom RAT + HVNC + Stealer + Grabber.exe
  "C:\Users\Admin\AppData\Local\Temp\Venom RAT + HVNC + Stealer + Grabber.exe"
  2⤵
  - Executes dropped EXE
  PID:1016

C:\Users\Public\System.exe
C:\Users\Public\System.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4908

C:\Users\Public\System.exe
C:\Users\Public\System.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1016

C:\Users\Public\System.exe
C:\Users\Public\System.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2692

C:\Users\Public\System.exe
C:\Users\Public\System.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4944

C:\Users\Public\System.exe
C:\Users\Public\System.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4432

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

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

Filesize
654B

MD5
2ff39f6c7249774be85fd60a8f9a245e

SHA1
684ff36b31aedc1e587c8496c02722c6698c1c4e

SHA256
e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced

SHA512
1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1

Download Submit
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
6d42b6da621e8df5674e26b799c8e2aa

SHA1
ab3ce1327ea1eeedb987ec823d5e0cb146bafa48

SHA256
5ab6a1726f425c6d0158f55eb8d81754ddedd51e651aa0a899a29b7a58619c4c

SHA512
53faffbda8a835bc1143e894c118c15901a5fd09cfc2224dd2f754c06dc794897315049a579b9a8382d4564f071576045aaaf824019b7139d939152dca38ce29

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

Filesize
944B

MD5
ba169f4dcbbf147fe78ef0061a95e83b

SHA1
92a571a6eef49fff666e0f62a3545bcd1cdcda67

SHA256
5ef1421e19fde4bc03cd825dd7d6c0e7863f85fd8f0aa4a4d4f8d555dc7606d1

SHA512
8d2e5e552210dcda684682538bc964fdd8a8ff5b24cc2cc8af813729f0202191f98eb42d38d2355df17ae620fe401aad6ceaedaed3b112fdacd32485a3a0c07c

Download Submit
C:\Users\Admin\AppData\Local\Temp\Venom RAT + HVNC + Stealer + Grabber.exe

Filesize
14.2MB

MD5
3b3a304c6fc7a3a1d9390d7cbff56634

SHA1
e8bd5244e6362968f5017680da33f1e90ae63dd7

SHA256
7331368c01b2a16bda0f013f376a039e6aeb4cb2dd8b0c2afc7ca208fb544c58

SHA512
7f1beacb6449b3b3e108016c8264bb9a21ecba526c2778794f16a7f9c817c0bbd5d4cf0c208d706d25c54322a875da899ab047aab1e07684f6b7b6083981abe5

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_1g33jmdn.dkc.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\ngrok.exe

Filesize
16.4MB

MD5
ee2397b5f70e81dd97a4076ba1cb1d3a

SHA1
8350f648ebd269b4bca720b4143dd3edcdfafa8f

SHA256
b5b1454e2e3a66edf3bde92b29a4f4b324fa3c3d88dc28e378c22cb42237cc67

SHA512
57fc76393881c504ac4c37a8ea812a7e21f2bed4ffa4de42a2e6e4558a78bba679ec0f8fcdc39798306c3a97e424fb875680b7f78ac07be3f7f58df093575562

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp1072.tmp.bat

Filesize
135B

MD5
c32a32a16b3a1bfedfdd290488f96dfd

SHA1
6da90e5ccbcfa2f2959a281791c7375a8009b01e

SHA256
d59cd2724f93fbf30cfde2fcc1c5866fa05851fa9cdb64f360e47c92f560b8d7

SHA512
cded57c545c0d4d9457943195e76b833ffe4f8960007ab82c1c542848a564579b8e91d33264e196e25d87ed7d5aef3e02f453ce6b491776342ce87085f8a2590

Download Submit
C:\Users\Admin\AppData\Local\ngrok\ngrok.yml

Filesize
74B

MD5
bba5b2391399c16d21db57bd7e890189

SHA1
4b5eabb00b80bd8322b77069e5e017e5289fd357

SHA256
d10af7343833d3e3db3d4d19237c967fa2d8d27b3737b4eb2d5ef90fd32c3a05

SHA512
c800e9a34c8cead8b91fb1f0b6d9bf4cf6e3e31d9073be242fe2a8de007c1693353923054113c0c8ba73446bff9fc92750b539bcfd6aaa5a42044ac9a772bd47

Download Submit
C:\Windows\System.exe

Filesize
76KB

MD5
a87e89722f01fad0ba63a165409aa1b6

SHA1
db66ceb27a9d35bd6f1826c1019d43c9b6116a8a

SHA256
c35a4341298f16eb875e646c79922b67759e86c0ab9348ad48bf95606c165eb5

SHA512
91225d1088f8fce5c2894e606f876177a630f851f9ec4a973de5b7a5f45a726085e2b22522c419d94d97679898ba355fbfc11190aa4c0290be5e14a73d27e109

Download Submit
memory/1016-28-0x00007FF90E8B0000-0x00007FF90F371000-memory.dmp

Filesize
10.8MB

Download
memory/1016-30-0x000001D6491C0000-0x000001D649FF4000-memory.dmp

Filesize
14.2MB

Download
memory/1016-31-0x00007FF90E8B0000-0x00007FF90F371000-memory.dmp

Filesize
10.8MB

Download
memory/4364-42-0x000002AFFD030000-0x000002AFFD052000-memory.dmp

Filesize
136KB

Download
memory/4412-1-0x0000000000BA0000-0x00000000019EA000-memory.dmp

Filesize
14.3MB

Download
memory/4412-29-0x00007FF90E8B0000-0x00007FF90F371000-memory.dmp

Filesize
10.8MB

Download
memory/4412-0-0x00007FF90E8B3000-0x00007FF90E8B5000-memory.dmp

Filesize
8KB

Download
memory/4412-4-0x00007FF90E8B0000-0x00007FF90F371000-memory.dmp

Filesize
10.8MB

Download
memory/4844-14-0x00007FF90E8B0000-0x00007FF90F371000-memory.dmp

Filesize
10.8MB

Download
memory/4844-80-0x00007FF90E8B0000-0x00007FF90F371000-memory.dmp

Filesize
10.8MB

Download
memory/4844-86-0x000000001D890000-0x000000001DF9C000-memory.dmp

Filesize
7.0MB

Download
memory/4844-79-0x00007FF90E8B0000-0x00007FF90F371000-memory.dmp

Filesize
10.8MB

Download
memory/4844-15-0x0000000000CF0000-0x0000000000D0A000-memory.dmp

Filesize
104KB

Download
memory/4844-107-0x00007FF90E8B0000-0x00007FF90F371000-memory.dmp

Filesize
10.8MB

Download
memory/4844-32-0x00007FF90E8B0000-0x00007FF90F371000-memory.dmp

Filesize
10.8MB

Download