asyncrat | c2d4aff226178355b8ef7b9e28e4d2869def12eacdfe91e9ed1135b6cd20deab

General

Target

DemonSpoofCall.exe
Size

9.7MB
MD5

1dfe6d227d66658b9ab790ce66160551
SHA1

62087a4f6c0b47635f068262b3d9df15aab746d9
SHA256

c2d4aff226178355b8ef7b9e28e4d2869def12eacdfe91e9ed1135b6cd20deab
SHA512

c10e34658ea727c52f96051fd9fe6d3c1b6f3dbeed9b9ced6bbfd2819db3a8aaeea693f890581190d3d10749e3000f8088c543d8cd006301c0b3032c4457d454
SSDEEP

196608:lrkCDFxgtiWe4/RSgOqTn9nBIzuZrSW+xHGoFlaoDKWzQo1OIg5sa7t:5eiYRNXnDZrSF8oF9uB5B

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

Venom RAT + HVNC + Stealer + Grabber v6.0.3

Botnet

Default

C2

127.0.0.1:6606

89.84.63.139:6606

Mutex

caqxyzoxvrzhnrxwoc

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
behavioral2/memory/4152-9-0x0000000007290000-0x00000000072A8000-memory.dmp	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
4152	PDFreader.exe

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Legitimate hosting services abused for malware hosting/C2 1 TTPs 3 IoCs

Web Service

T1102

flow	ioc
3	raw.githubusercontent.com
1	raw.githubusercontent.com
2	raw.githubusercontent.com

System Location Discovery: System Language Discovery 1 TTPs 4 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	DemonSpoofCall.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PDFreader.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
3548	timeout.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
3148	DemonSpoofCall.exe
4152	PDFreader.exe
4152	PDFreader.exe
4152	PDFreader.exe
4152	PDFreader.exe
4152	PDFreader.exe
4152	PDFreader.exe
4152	PDFreader.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3148	DemonSpoofCall.exe
Token: SeDebugPrivilege	4152	PDFreader.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4152	PDFreader.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 3148 wrote to memory of 4152	3148	DemonSpoofCall.exe	78
PID 3148 wrote to memory of 4152	3148	DemonSpoofCall.exe	78
PID 3148 wrote to memory of 4152	3148	DemonSpoofCall.exe	78
PID 3148 wrote to memory of 4152	3148	DemonSpoofCall.exe	78
PID 4152 wrote to memory of 1784	4152	PDFreader.exe	80
PID 4152 wrote to memory of 1784	4152	PDFreader.exe	80
PID 4152 wrote to memory of 1784	4152	PDFreader.exe	80
PID 1784 wrote to memory of 3548	1784	cmd.exe	82
PID 1784 wrote to memory of 3548	1784	cmd.exe	82
PID 1784 wrote to memory of 3548	1784	cmd.exe	82

C:\Users\Admin\AppData\Local\Temp\DemonSpoofCall.exe
"C:\Users\Admin\AppData\Local\Temp\DemonSpoofCall.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3148
- C:\Users\Admin\AppData\Roaming\PDFreader.exe
  "C:\Users\Admin\AppData\Roaming\PDFreader.exe"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4152
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp4606.tmp.bat""
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:1784
  - - C:\Windows\SysWOW64\timeout.exe
      timeout 3
      4⤵
      System Location Discovery: System Language Discovery
      Delays execution with timeout.exe
      PID:3548

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp4606.tmp.bat

Filesize
158B

MD5
5874d6c320549e3b7a756c0cb2dc610f

SHA1
fb9f6e34c72ee3fc7c3a253c987c628e56c7dda2

SHA256
86b8030d081827385c002388b55ceb5a9ec7101457c491ffc6dc67db0e72c64e

SHA512
960bd67326d65e6e59de14e61370d599b504dca24cf113f0b600e53a4f2a97ffed90137c97f7dc4078d3b51dd5d1f6a03e62c4a2c0d331e33e9c018231fdc575

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

Filesize
8.8MB

MD5
f7dfe66072d3a91e2cd71436d4f3fb33

SHA1
7a76472a762c7cf68748c3b6b213ada71c5bba5a

SHA256
22e912427beff52645f1e2a19e361ecb03258a009a0d45e52fe20deefb224234

SHA512
22f49b6bcf5db183a0ac23e4b51631f8487d30f2508be9ac0408760f04224397d2851eaa3027b9f75607337a0395898ec2eed006ae4ac38dcdcc3f17ef5316a7

Download Submit
memory/3148-0-0x0000000000C94000-0x0000000000C95000-memory.dmp

Filesize
4KB

Download
memory/3148-16-0x0000000000C94000-0x0000000000C95000-memory.dmp

Filesize
4KB

Download
memory/4152-9-0x0000000007290000-0x00000000072A8000-memory.dmp

Filesize
96KB

Download
memory/4152-17-0x0000000000AF0000-0x0000000001317000-memory.dmp

Filesize
8.2MB

Download
memory/4152-7-0x0000000000AF0000-0x0000000001317000-memory.dmp

Filesize
8.2MB

Download
memory/4152-10-0x000000000A070000-0x000000000A616000-memory.dmp

Filesize
5.6MB

Download
memory/4152-12-0x000000000A730000-0x000000000A834000-memory.dmp

Filesize
1.0MB

Download
memory/4152-13-0x000000000AC40000-0x000000000ACD2000-memory.dmp

Filesize
584KB

Download
memory/4152-14-0x0000000000AF0000-0x0000000001317000-memory.dmp

Filesize
8.2MB

Download
memory/4152-15-0x000000000A6C0000-0x000000000A6CA000-memory.dmp

Filesize
40KB

Download
memory/4152-6-0x0000000003450000-0x0000000003467000-memory.dmp

Filesize
92KB

Download
memory/4152-8-0x0000000000AF0000-0x0000000001317000-memory.dmp

Filesize
8.2MB

Download
memory/4152-20-0x000000000B2B0000-0x000000000B34C000-memory.dmp

Filesize
624KB

Download
memory/4152-21-0x000000000B6D0000-0x000000000B736000-memory.dmp

Filesize
408KB

Download
memory/4152-23-0x0000000000AF0000-0x0000000001317000-memory.dmp

Filesize
8.2MB

Download
memory/4152-24-0x000000000C320000-0x000000000C396000-memory.dmp

Filesize
472KB

Download
memory/4152-25-0x000000000C2A0000-0x000000000C2B0000-memory.dmp

Filesize
64KB

Download
memory/4152-26-0x000000000C300000-0x000000000C31E000-memory.dmp

Filesize
120KB

Download
memory/4152-27-0x000000000C0F0000-0x000000000C100000-memory.dmp

Filesize
64KB

Download
memory/4152-28-0x0000000009F80000-0x0000000009FE6000-memory.dmp

Filesize
408KB

Download
memory/4152-5-0x0000000000FD4000-0x0000000000FD5000-memory.dmp

Filesize
4KB

Download
memory/4152-34-0x0000000000AF0000-0x0000000001317000-memory.dmp

Filesize
8.2MB

Download

Analysis

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