asyncrat | c502384c7e37f78fdea4508cb3e33bb19e464e6a1c0a3ad3c6bbab07ad689682

General

Target

c502384c7e37f78fdea4508cb3e33bb19e464e6a1c0a3ad3c6bbab07ad689682.exe
Size

3.1MB
MD5

318dd600d5df858f9b12e161c1cdf794
SHA1

d4eba922ccb8c301708f1b67f8e17fb5ae09aae5
SHA256

c502384c7e37f78fdea4508cb3e33bb19e464e6a1c0a3ad3c6bbab07ad689682
SHA512

7ec7944dc920d464a1d7370b60b7a65cfdb2c46be731e00e6631b8cb9e2307a7bb14282b0148bc2cbe241b2357f4f1466b68dfb9595446fa80446e27f65ba8bb
SSDEEP

98304:DB3EVGIP9YVclwvxe3MLRWcq2cFhimdztR+Vm/2Z:DpGP9MycxijciFhrzd/2

Score

10^/10

asyncrat venom clients discovery rat

Malware Config

Extracted

Family

asyncrat

Version

5.0.5

Botnet

Venom Clients

C2

178.117.80.225:3998

Mutex

Venom_RAT_HVNC_Mutex_Venom RAT_HVNC

Attributes

delay
1
install
false
install_folder
%AppData%

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
behavioral1/files/0x00320000000174cc-20.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
2600	Client.exe

Loads dropped DLL 1 IoCs

pid	Process
3028	RegAsm.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2140 set thread context of 3028	2140	c502384c7e37f78fdea4508cb3e33bb19e464e6a1c0a3ad3c6bbab07ad689682.exe	31

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	c502384c7e37f78fdea4508cb3e33bb19e464e6a1c0a3ad3c6bbab07ad689682.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegAsm.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WINWORD.EXE

Office loads VBA resources, possible macro or embedded object present

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2612	WINWORD.EXE

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2600	Client.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2612	WINWORD.EXE
2612	WINWORD.EXE

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 2140 wrote to memory of 3028	2140	c502384c7e37f78fdea4508cb3e33bb19e464e6a1c0a3ad3c6bbab07ad689682.exe	31
PID 2140 wrote to memory of 3028	2140	c502384c7e37f78fdea4508cb3e33bb19e464e6a1c0a3ad3c6bbab07ad689682.exe	31
PID 2140 wrote to memory of 3028	2140	c502384c7e37f78fdea4508cb3e33bb19e464e6a1c0a3ad3c6bbab07ad689682.exe	31
PID 2140 wrote to memory of 3028	2140	c502384c7e37f78fdea4508cb3e33bb19e464e6a1c0a3ad3c6bbab07ad689682.exe	31
PID 2140 wrote to memory of 3028	2140	c502384c7e37f78fdea4508cb3e33bb19e464e6a1c0a3ad3c6bbab07ad689682.exe	31
PID 2140 wrote to memory of 3028	2140	c502384c7e37f78fdea4508cb3e33bb19e464e6a1c0a3ad3c6bbab07ad689682.exe	31
PID 2140 wrote to memory of 3028	2140	c502384c7e37f78fdea4508cb3e33bb19e464e6a1c0a3ad3c6bbab07ad689682.exe	31
PID 2140 wrote to memory of 3028	2140	c502384c7e37f78fdea4508cb3e33bb19e464e6a1c0a3ad3c6bbab07ad689682.exe	31
PID 2140 wrote to memory of 3028	2140	c502384c7e37f78fdea4508cb3e33bb19e464e6a1c0a3ad3c6bbab07ad689682.exe	31
PID 2140 wrote to memory of 3028	2140	c502384c7e37f78fdea4508cb3e33bb19e464e6a1c0a3ad3c6bbab07ad689682.exe	31
PID 2140 wrote to memory of 3028	2140	c502384c7e37f78fdea4508cb3e33bb19e464e6a1c0a3ad3c6bbab07ad689682.exe	31
PID 2140 wrote to memory of 3028	2140	c502384c7e37f78fdea4508cb3e33bb19e464e6a1c0a3ad3c6bbab07ad689682.exe	31
PID 3028 wrote to memory of 2612	3028	RegAsm.exe	32
PID 3028 wrote to memory of 2612	3028	RegAsm.exe	32
PID 3028 wrote to memory of 2612	3028	RegAsm.exe	32
PID 3028 wrote to memory of 2612	3028	RegAsm.exe	32
PID 3028 wrote to memory of 2600	3028	RegAsm.exe	33
PID 3028 wrote to memory of 2600	3028	RegAsm.exe	33
PID 3028 wrote to memory of 2600	3028	RegAsm.exe	33
PID 3028 wrote to memory of 2600	3028	RegAsm.exe	33
PID 2612 wrote to memory of 2160	2612	WINWORD.EXE	34
PID 2612 wrote to memory of 2160	2612	WINWORD.EXE	34
PID 2612 wrote to memory of 2160	2612	WINWORD.EXE	34
PID 2612 wrote to memory of 2160	2612	WINWORD.EXE	34

C:\Users\Admin\AppData\Local\Temp\c502384c7e37f78fdea4508cb3e33bb19e464e6a1c0a3ad3c6bbab07ad689682.exe
"C:\Users\Admin\AppData\Local\Temp\c502384c7e37f78fdea4508cb3e33bb19e464e6a1c0a3ad3c6bbab07ad689682.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2140
- 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:3028
- - C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE
    "C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE" /n "C:\Users\Admin\AppData\Local\Temp\cursus seksualiteit.docx"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: AddClipboardFormatListener
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:2612
  - - C:\Windows\splwow64.exe
      C:\Windows\splwow64.exe 12288
      4⤵
      PID:2160
- - C:\Users\Admin\AppData\Local\Temp\Client.exe
    "C:\Users\Admin\AppData\Local\Temp\Client.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:2600

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

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

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\cursus seksualiteit.docx

Filesize
3.0MB

MD5
176899821365a34a50d9ee5c4f4044b5

SHA1
b42fe4994783ce6e1953733829725ff9b777a0af

SHA256
2a97558d06310beb60ed50a09b1217bace657c2364b07d3d6437aac0e3119255

SHA512
539995f36da84bd4d952e4934105c54bc87258ee23f53a89e66aad895cb3612003efb114dd58e0b51f216701ac436945551fc82653ea18b5c52c83e14b1e5ef0

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

Filesize
63KB

MD5
065916df76a29b60fae9879d48f6a23c

SHA1
39955f523f47653e72758e4a504ba2b28f65ae67

SHA256
281246ed2415cc6b47bdaa3af0910a7f0fc97a854e4b146a88469b97225bda9b

SHA512
dbf17e5ed7cc22b80ccc2626dc33206d207432bc18693e51d7ecf86a93b2a8ebfc25842fecdbe69d1379bc3218f4a0017dd75bb5abc60e244465d37a15abb133

Download Submit
memory/2140-5-0x0000000005090000-0x00000000053B2000-memory.dmp

Filesize
3.1MB

Download
memory/2140-4-0x00000000745A0000-0x0000000074C8E000-memory.dmp

Filesize
6.9MB

Download
memory/2140-0-0x00000000745AE000-0x00000000745AF000-memory.dmp

Filesize
4KB

Download
memory/2140-3-0x00000000745AE000-0x00000000745AF000-memory.dmp

Filesize
4KB

Download
memory/2140-16-0x00000000745A0000-0x0000000074C8E000-memory.dmp

Filesize
6.9MB

Download
memory/2140-1-0x0000000000AC0000-0x0000000000DE4000-memory.dmp

Filesize
3.1MB

Download
memory/2140-2-0x00000000745A0000-0x0000000074C8E000-memory.dmp

Filesize
6.9MB

Download
memory/2600-31-0x00000000013D0000-0x00000000013E6000-memory.dmp

Filesize
88KB

Download
memory/2612-18-0x000000002FEE1000-0x000000002FEE2000-memory.dmp

Filesize
4KB

Download
memory/2612-33-0x000000006CEAD000-0x000000006CEB8000-memory.dmp

Filesize
44KB

Download
memory/2612-25-0x000000006CEAD000-0x000000006CEB8000-memory.dmp

Filesize
44KB

Download
memory/2612-21-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/3028-12-0x0000000000400000-0x000000000071D000-memory.dmp

Filesize
3.1MB

Download
memory/3028-6-0x0000000000400000-0x000000000071D000-memory.dmp

Filesize
3.1MB

Download
memory/3028-14-0x0000000000400000-0x000000000071D000-memory.dmp

Filesize
3.1MB

Download
memory/3028-7-0x0000000000400000-0x000000000071D000-memory.dmp

Filesize
3.1MB

Download
memory/3028-9-0x0000000000400000-0x000000000071D000-memory.dmp

Filesize
3.1MB

Download
memory/3028-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/3028-8-0x0000000000400000-0x000000000071D000-memory.dmp

Filesize
3.1MB

Download

Analysis

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