asyncrat | 8640c15126e8ec4503c9fa88ec3136baa36bfa37621e434674e117b83ee16ce1

Analysis

max time kernel
300s
max time network
297s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
31/01/2025, 01:45

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General

Target

PO690654W226614626001MLCWHKGH10051956.pdf.exe
Size

1.2MB
MD5

22d2fb041fb5c4424f5b34e7826e1aaf
SHA1

f4e4aed78f80fd50ff2a39633c78d705c1324257
SHA256

ef9eed5753290ece2e0b521d46667fdafe0d29581f91e3d9160b17153e73ebcf
SHA512

c5285d57239bcf1278677442d7273c5c14148d5e055ba5583a9fc4e9b190ffef7b56da05abcea3e04484a302b40c4a4eabfa64d73d44b3b3069d1d34c9f2534d
SSDEEP

24576:8YsZPpPEug3h24WBVTzzXetV28sjMELZtGOm1Punn0yfChQB1thox+xkAu:8YsBpP53iL2QwDGu0ismthw+xQ

Score

10^/10

asyncrat jan discovery persistence rat

Malware Config

Extracted

Family

asyncrat

Version

Venom RAT + HVNC + Stealer + Grabber v6.0.3

Botnet

JAN

Mutex

qnxsdyjsfdtxvg

Attributes

delay
1
install
false
install_folder
%AppData%
pastebin_config
https://pastebin.com/raw/Ax2bm8Nk

aes.plain

Signatures

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

Modifies WinLogon for persistence 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1547.004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3290804112-2823094203-3137964600-1000\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe,C:\\Users\\Admin\\AppData\\Local\\terralink.exe,"	reg.exe

Executes dropped EXE 1 IoCs

pid	Process
1864	terralink.exe

Loads dropped DLL 2 IoCs

pid	Process
2892	cmd.exe
2892	cmd.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 32 IoCs

Web Service

T1102

flow	ioc
33	pastebin.com
7	pastebin.com
9	pastebin.com
15	pastebin.com
20	pastebin.com
24	pastebin.com
28	pastebin.com
29	pastebin.com
32	pastebin.com
8	pastebin.com
21	pastebin.com
22	pastebin.com
23	pastebin.com
16	pastebin.com
27	pastebin.com
13	pastebin.com
26	pastebin.com
10	pastebin.com
17	pastebin.com
30	pastebin.com
31	pastebin.com
5	pastebin.com
14	pastebin.com
35	pastebin.com
19	pastebin.com
18	pastebin.com
25	pastebin.com
34	pastebin.com
4	pastebin.com
6	pastebin.com
11	pastebin.com
12	pastebin.com

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1864 set thread context of 1068	1864	terralink.exe	41

System Location Discovery: System Language Discovery 1 TTPs 9 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	InstallUtil.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	reg.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PO690654W226614626001MLCWHKGH10051956.pdf.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	terralink.exe

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 5 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
2788	PING.EXE
2856	PING.EXE
2424	cmd.exe
1588	PING.EXE
2892	cmd.exe

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
2856	PING.EXE
1588	PING.EXE
2788	PING.EXE

Suspicious behavior: EnumeratesProcesses 44 IoCs

pid	Process
2404	PO690654W226614626001MLCWHKGH10051956.pdf.exe
2404	PO690654W226614626001MLCWHKGH10051956.pdf.exe
2404	PO690654W226614626001MLCWHKGH10051956.pdf.exe
2404	PO690654W226614626001MLCWHKGH10051956.pdf.exe
2404	PO690654W226614626001MLCWHKGH10051956.pdf.exe
2404	PO690654W226614626001MLCWHKGH10051956.pdf.exe
1864	terralink.exe
1864	terralink.exe
1864	terralink.exe
1864	terralink.exe
1864	terralink.exe
1068	InstallUtil.exe
1068	InstallUtil.exe
1068	InstallUtil.exe
1068	InstallUtil.exe
1068	InstallUtil.exe
1068	InstallUtil.exe
1068	InstallUtil.exe
1068	InstallUtil.exe
1068	InstallUtil.exe
1068	InstallUtil.exe
1068	InstallUtil.exe
1068	InstallUtil.exe
1068	InstallUtil.exe
1068	InstallUtil.exe
1068	InstallUtil.exe
1068	InstallUtil.exe
1068	InstallUtil.exe
1068	InstallUtil.exe
1068	InstallUtil.exe
1068	InstallUtil.exe
1068	InstallUtil.exe
1068	InstallUtil.exe
1068	InstallUtil.exe
1068	InstallUtil.exe
1068	InstallUtil.exe
1068	InstallUtil.exe
1068	InstallUtil.exe
1068	InstallUtil.exe
1068	InstallUtil.exe
1068	InstallUtil.exe
1068	InstallUtil.exe
1068	InstallUtil.exe
1068	InstallUtil.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2404	PO690654W226614626001MLCWHKGH10051956.pdf.exe
Token: SeDebugPrivilege	1864	terralink.exe
Token: SeDebugPrivilege	1068	InstallUtil.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1068	InstallUtil.exe

Suspicious use of WriteProcessMemory 52 IoCs

description	pid	Process	procid_target
PID 2404 wrote to memory of 2424	2404	PO690654W226614626001MLCWHKGH10051956.pdf.exe	30
PID 2404 wrote to memory of 2424	2404	PO690654W226614626001MLCWHKGH10051956.pdf.exe	30
PID 2404 wrote to memory of 2424	2404	PO690654W226614626001MLCWHKGH10051956.pdf.exe	30
PID 2404 wrote to memory of 2424	2404	PO690654W226614626001MLCWHKGH10051956.pdf.exe	30
PID 2424 wrote to memory of 1588	2424	cmd.exe	32
PID 2424 wrote to memory of 1588	2424	cmd.exe	32
PID 2424 wrote to memory of 1588	2424	cmd.exe	32
PID 2424 wrote to memory of 1588	2424	cmd.exe	32
PID 2404 wrote to memory of 2892	2404	PO690654W226614626001MLCWHKGH10051956.pdf.exe	34
PID 2404 wrote to memory of 2892	2404	PO690654W226614626001MLCWHKGH10051956.pdf.exe	34
PID 2404 wrote to memory of 2892	2404	PO690654W226614626001MLCWHKGH10051956.pdf.exe	34
PID 2404 wrote to memory of 2892	2404	PO690654W226614626001MLCWHKGH10051956.pdf.exe	34
PID 2892 wrote to memory of 2788	2892	cmd.exe	36
PID 2892 wrote to memory of 2788	2892	cmd.exe	36
PID 2892 wrote to memory of 2788	2892	cmd.exe	36
PID 2892 wrote to memory of 2788	2892	cmd.exe	36
PID 2424 wrote to memory of 2636	2424	cmd.exe	37
PID 2424 wrote to memory of 2636	2424	cmd.exe	37
PID 2424 wrote to memory of 2636	2424	cmd.exe	37
PID 2424 wrote to memory of 2636	2424	cmd.exe	37
PID 2892 wrote to memory of 2856	2892	cmd.exe	38
PID 2892 wrote to memory of 2856	2892	cmd.exe	38
PID 2892 wrote to memory of 2856	2892	cmd.exe	38
PID 2892 wrote to memory of 2856	2892	cmd.exe	38
PID 2892 wrote to memory of 1864	2892	cmd.exe	39
PID 2892 wrote to memory of 1864	2892	cmd.exe	39
PID 2892 wrote to memory of 1864	2892	cmd.exe	39
PID 2892 wrote to memory of 1864	2892	cmd.exe	39
PID 1864 wrote to memory of 2196	1864	terralink.exe	40
PID 1864 wrote to memory of 2196	1864	terralink.exe	40
PID 1864 wrote to memory of 2196	1864	terralink.exe	40
PID 1864 wrote to memory of 2196	1864	terralink.exe	40
PID 1864 wrote to memory of 2196	1864	terralink.exe	40
PID 1864 wrote to memory of 2196	1864	terralink.exe	40
PID 1864 wrote to memory of 2196	1864	terralink.exe	40
PID 1864 wrote to memory of 2196	1864	terralink.exe	40
PID 1864 wrote to memory of 2196	1864	terralink.exe	40
PID 1864 wrote to memory of 2196	1864	terralink.exe	40
PID 1864 wrote to memory of 2196	1864	terralink.exe	40
PID 1864 wrote to memory of 2196	1864	terralink.exe	40
PID 1864 wrote to memory of 1068	1864	terralink.exe	41
PID 1864 wrote to memory of 1068	1864	terralink.exe	41
PID 1864 wrote to memory of 1068	1864	terralink.exe	41
PID 1864 wrote to memory of 1068	1864	terralink.exe	41
PID 1864 wrote to memory of 1068	1864	terralink.exe	41
PID 1864 wrote to memory of 1068	1864	terralink.exe	41
PID 1864 wrote to memory of 1068	1864	terralink.exe	41
PID 1864 wrote to memory of 1068	1864	terralink.exe	41
PID 1864 wrote to memory of 1068	1864	terralink.exe	41
PID 1864 wrote to memory of 1068	1864	terralink.exe	41
PID 1864 wrote to memory of 1068	1864	terralink.exe	41
PID 1864 wrote to memory of 1068	1864	terralink.exe	41

C:\Users\Admin\AppData\Local\Temp\PO690654W226614626001MLCWHKGH10051956.pdf.exe
"C:\Users\Admin\AppData\Local\Temp\PO690654W226614626001MLCWHKGH10051956.pdf.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2404
- C:\Windows\SysWOW64\cmd.exe
  "cmd" /c ping 127.0.0.1 -n 37 > nul && REG ADD "HKCU\Software\Microsoft\Windows NT\CurrentVersion\Winlogon" /f /v "Shell" /t REG_SZ /d "explorer.exe,C:\Users\Admin\AppData\Local\terralink.exe,"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:2424
- - C:\Windows\SysWOW64\PING.EXE
    ping 127.0.0.1 -n 37
    3⤵
    - System Location Discovery: System Language Discovery
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:1588
- - C:\Windows\SysWOW64\reg.exe
    REG ADD "HKCU\Software\Microsoft\Windows NT\CurrentVersion\Winlogon" /f /v "Shell" /t REG_SZ /d "explorer.exe,C:\Users\Admin\AppData\Local\terralink.exe,"
    3⤵
    - Modifies WinLogon for persistence
    - System Location Discovery: System Language Discovery
    PID:2636
- C:\Windows\SysWOW64\cmd.exe
  "cmd" /c ping 127.0.0.1 -n 49 > nul && copy "C:\Users\Admin\AppData\Local\Temp\PO690654W226614626001MLCWHKGH10051956.pdf.exe" "C:\Users\Admin\AppData\Local\terralink.exe" && ping 127.0.0.1 -n 49 > nul && "C:\Users\Admin\AppData\Local\terralink.exe"
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:2892
- - C:\Windows\SysWOW64\PING.EXE
    ping 127.0.0.1 -n 49
    3⤵
    - System Location Discovery: System Language Discovery
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:2788
- - C:\Windows\SysWOW64\PING.EXE
    ping 127.0.0.1 -n 49
    3⤵
    - System Location Discovery: System Language Discovery
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:2856
- - C:\Users\Admin\AppData\Local\terralink.exe
    "C:\Users\Admin\AppData\Local\terralink.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:1864
  - - C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe"
      4⤵
      PID:2196
  - - C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe"
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of SetWindowsHookEx
      PID:1068

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Winlogon Helper DLL

T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Winlogon Helper DLL

T1547.004

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Remote System Discovery

T1018

System Location Discovery

T1614

System Language Discovery

T1614.001

System Network Configuration Discovery

T1016

Internet Connection Discovery

T1016.001

Lateral Movement

Collection

Command and Control

Web Service

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

\Users\Admin\AppData\Local\terralink.exe

Filesize
1.2MB

MD5
22d2fb041fb5c4424f5b34e7826e1aaf

SHA1
f4e4aed78f80fd50ff2a39633c78d705c1324257

SHA256
ef9eed5753290ece2e0b521d46667fdafe0d29581f91e3d9160b17153e73ebcf

SHA512
c5285d57239bcf1278677442d7273c5c14148d5e055ba5583a9fc4e9b190ffef7b56da05abcea3e04484a302b40c4a4eabfa64d73d44b3b3069d1d34c9f2534d

Download Submit
memory/1068-41-0x0000000000400000-0x0000000000418000-memory.dmp

Filesize
96KB

Download
memory/1068-42-0x0000000000400000-0x0000000000418000-memory.dmp

Filesize
96KB

Download
memory/1068-40-0x0000000000400000-0x0000000000418000-memory.dmp

Filesize
96KB

Download
memory/1068-39-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/1864-21-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1864-20-0x0000000000950000-0x000000000096A000-memory.dmp

Filesize
104KB

Download
memory/1864-19-0x00000000009E0000-0x0000000000B22000-memory.dmp

Filesize
1.3MB

Download
memory/2196-26-0x0000000000090000-0x00000000000A8000-memory.dmp

Filesize
96KB

Download
memory/2196-22-0x0000000000090000-0x00000000000A8000-memory.dmp

Filesize
96KB

Download
memory/2196-30-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2196-28-0x0000000000090000-0x00000000000A8000-memory.dmp

Filesize
96KB

Download
memory/2196-24-0x0000000000090000-0x00000000000A8000-memory.dmp

Filesize
96KB

Download
memory/2404-0-0x000000007458E000-0x000000007458F000-memory.dmp

Filesize
4KB

Download
memory/2404-5-0x0000000074580000-0x0000000074C6E000-memory.dmp

Filesize
6.9MB

Download
memory/2404-8-0x0000000074580000-0x0000000074C6E000-memory.dmp

Filesize
6.9MB

Download
memory/2404-6-0x000000007458E000-0x000000007458F000-memory.dmp

Filesize
4KB

Download
memory/2404-7-0x0000000074580000-0x0000000074C6E000-memory.dmp

Filesize
6.9MB

Download
memory/2404-4-0x0000000074580000-0x0000000074C6E000-memory.dmp

Filesize
6.9MB

Download
memory/2404-3-0x0000000000740000-0x0000000000782000-memory.dmp

Filesize
264KB

Download
memory/2404-2-0x0000000074580000-0x0000000074C6E000-memory.dmp

Filesize
6.9MB

Download
memory/2404-1-0x0000000000C90000-0x0000000000DD2000-memory.dmp

Filesize
1.3MB

Download