asyncrat | 9b18ec35cd15fc61fa3ab053e2d83994c78cb7a7f66a3560bae910550463c039

Analysis

max time kernel
147s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
16-12-2024 03:45

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General

Target

PDA ORDER.exe
Size

423KB
MD5

d516c57c54c6c65ff050e16e871e71e2
SHA1

4ca54d94edec79b304a6b4d85e7d5d0dc87407ac
SHA256

74615bedcd52ff089b0ed9dede11c46cd27de39b0b52c309ad71175e79e53868
SHA512

e7125e5bc1ec11ab6c2961ca1aecb22de09e194bfad31d0309815522706580aff9acbfaac309aef0a4f4d8de0811e8bd9444ca46d6bd2838f54d1ba84764eddb
SSDEEP

6144:IHbY645rq7qbvKZKgOxJY+zzqArh0VuWPzvgY+u3j+B8wsOcBtSoA:gtQTbCKDRaOhGzvdxT+BVsOcD

Score

10^/10

asyncrat remcos default host discovery persistence rat

Malware Config

Extracted

Family

remcos

Version

1.7 Pro

Botnet

Host

194.5.98.81:7123

Attributes

audio_folder
audio
audio_path
%AppData%
audio_record_time
5
connect_delay
0
connect_interval
5
copy_file
mstsc.exe
copy_folder
remcos
delete_file
false
hide_file
true
hide_keylog_file
false
install_flag
true
install_path
%AppData%
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
keylog_path
%AppData%
mouse_option
false
mutex
remcos_lfqwkauxufogluh
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screens
screenshot_path
%AppData%
screenshot_time
1
startup_value
remcos
take_screenshot_option
false
take_screenshot_time
5

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

127.0.0.1:2510

194.5.98.81:2510

Mutex

AsyncMutex_6SI8OkPnk

Attributes

delay
20
install
true
install_file
svchost.exe
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
Remcos
Remcos is a closed-source remote control and surveillance software.
rat remcos
Remcos family
remcos

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral2/files/0x00020000000226e0-26.dat	family_asyncrat

Checks computer location settings 2 TTPs 4 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-1-5-21-493223053-2004649691-1575712786-1000\Control Panel\International\Geo\Nation	Ab.exe
Key value queried	\REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000\Control Panel\International\Geo\Nation	PDA ORDER.exe
Key value queried	\REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000\Control Panel\International\Geo\Nation	PDA ORDER.exe
Key value queried	\REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000\Control Panel\International\Geo\Nation	BB.exe

Executes dropped EXE 4 IoCs

pid	Process
4240	Ab.exe
752	BB.exe
608	mstsc.exe
4872	svchost.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\remcos = "\"C:\\Users\\Admin\\AppData\\Roaming\\remcos\\mstsc.exe\""	BB.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\remcos = "\"C:\\Users\\Admin\\AppData\\Roaming\\remcos\\mstsc.exe\""	mstsc.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4540 set thread context of 3768	4540	PDA ORDER.exe	101

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 13 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	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PDA ORDER.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Ab.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	BB.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PDA ORDER.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	mstsc.exe

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

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
3304	PING.EXE

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
3616	timeout.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
3304	PING.EXE

Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
2488	schtasks.exe
740	schtasks.exe

Suspicious behavior: EnumeratesProcesses 20 IoCs

pid	Process
4540	PDA ORDER.exe
4240	Ab.exe
4240	Ab.exe
4240	Ab.exe
4240	Ab.exe
4240	Ab.exe
4240	Ab.exe
4240	Ab.exe
4240	Ab.exe
4240	Ab.exe
4240	Ab.exe
4240	Ab.exe
4240	Ab.exe
4240	Ab.exe
4240	Ab.exe
4240	Ab.exe
4240	Ab.exe
4240	Ab.exe
4240	Ab.exe
4240	Ab.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	4540	PDA ORDER.exe
Token: SeDebugPrivilege	4240	Ab.exe
Token: SeDebugPrivilege	4872	svchost.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
3768	PDA ORDER.exe
608	mstsc.exe

Suspicious use of WriteProcessMemory 40 IoCs

description	pid	Process	procid_target
PID 4540 wrote to memory of 2488	4540	PDA ORDER.exe	99
PID 4540 wrote to memory of 2488	4540	PDA ORDER.exe	99
PID 4540 wrote to memory of 2488	4540	PDA ORDER.exe	99
PID 4540 wrote to memory of 3768	4540	PDA ORDER.exe	101
PID 4540 wrote to memory of 3768	4540	PDA ORDER.exe	101
PID 4540 wrote to memory of 3768	4540	PDA ORDER.exe	101
PID 4540 wrote to memory of 3768	4540	PDA ORDER.exe	101
PID 4540 wrote to memory of 3768	4540	PDA ORDER.exe	101
PID 4540 wrote to memory of 3768	4540	PDA ORDER.exe	101
PID 4540 wrote to memory of 3768	4540	PDA ORDER.exe	101
PID 3768 wrote to memory of 4240	3768	PDA ORDER.exe	102
PID 3768 wrote to memory of 4240	3768	PDA ORDER.exe	102
PID 3768 wrote to memory of 4240	3768	PDA ORDER.exe	102
PID 3768 wrote to memory of 752	3768	PDA ORDER.exe	103
PID 3768 wrote to memory of 752	3768	PDA ORDER.exe	103
PID 3768 wrote to memory of 752	3768	PDA ORDER.exe	103
PID 752 wrote to memory of 3632	752	BB.exe	104
PID 752 wrote to memory of 3632	752	BB.exe	104
PID 752 wrote to memory of 3632	752	BB.exe	104
PID 3632 wrote to memory of 3304	3632	cmd.exe	106
PID 3632 wrote to memory of 3304	3632	cmd.exe	106
PID 3632 wrote to memory of 3304	3632	cmd.exe	106
PID 3632 wrote to memory of 608	3632	cmd.exe	107
PID 3632 wrote to memory of 608	3632	cmd.exe	107
PID 3632 wrote to memory of 608	3632	cmd.exe	107
PID 4240 wrote to memory of 4032	4240	Ab.exe	108
PID 4240 wrote to memory of 4032	4240	Ab.exe	108
PID 4240 wrote to memory of 4032	4240	Ab.exe	108
PID 4240 wrote to memory of 3560	4240	Ab.exe	110
PID 4240 wrote to memory of 3560	4240	Ab.exe	110
PID 4240 wrote to memory of 3560	4240	Ab.exe	110
PID 3560 wrote to memory of 3616	3560	cmd.exe	112
PID 3560 wrote to memory of 3616	3560	cmd.exe	112
PID 3560 wrote to memory of 3616	3560	cmd.exe	112
PID 4032 wrote to memory of 740	4032	cmd.exe	113
PID 4032 wrote to memory of 740	4032	cmd.exe	113
PID 4032 wrote to memory of 740	4032	cmd.exe	113
PID 3560 wrote to memory of 4872	3560	cmd.exe	114
PID 3560 wrote to memory of 4872	3560	cmd.exe	114
PID 3560 wrote to memory of 4872	3560	cmd.exe	114

C:\Users\Admin\AppData\Local\Temp\PDA ORDER.exe
"C:\Users\Admin\AppData\Local\Temp\PDA ORDER.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4540
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\KHkWwNhPvyrETo" /XML "C:\Users\Admin\AppData\Local\Temp\tmp7E34.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:2488
- C:\Users\Admin\AppData\Local\Temp\PDA ORDER.exe
  "{path}"
  2⤵
  - Checks computer location settings
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3768
- - C:\Users\Admin\AppData\Local\Temp\Ab.exe
    "C:\Users\Admin\AppData\Local\Temp\Ab.exe" 0
    3⤵
    - Checks computer location settings
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:4240
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "svchost" /tr '"C:\Users\Admin\AppData\Roaming\svchost.exe"' & exit
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious use of WriteProcessMemory
      PID:4032
    - - C:\Windows\SysWOW64\schtasks.exe
        
        schtasks /create /f /sc onlogon /rl highest /tn "svchost" /tr '"C:\Users\Admin\AppData\Roaming\svchost.exe"'
        5⤵
        System Location Discovery: System Language Discovery
        Scheduled Task/Job: Scheduled Task
        
        PID:740
  - - C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpD443.tmp.bat""
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious use of WriteProcessMemory
      PID:3560
    - - C:\Windows\SysWOW64\timeout.exe
        
        timeout 3
        5⤵
        System Location Discovery: System Language Discovery
        Delays execution with timeout.exe
        
        PID:3616
    - - C:\Users\Admin\AppData\Roaming\svchost.exe
        
        "C:\Users\Admin\AppData\Roaming\svchost.exe"
        5⤵
        Executes dropped EXE
        System Location Discovery: System Language Discovery
        Suspicious use of AdjustPrivilegeToken
        
        PID:4872
- - C:\Users\Admin\AppData\Local\Temp\BB.exe
    "C:\Users\Admin\AppData\Local\Temp\BB.exe" 0
    3⤵
    - Checks computer location settings
    - Executes dropped EXE
    - Adds Run key to start application
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:752
  - - C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\install.bat" "
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious use of WriteProcessMemory
      PID:3632
    - - C:\Windows\SysWOW64\PING.EXE
        
        PING 127.0.0.1 -n 2
        5⤵
        System Location Discovery: System Language Discovery
        System Network Configuration Discovery: Internet Connection Discovery
        Runs ping.exe
        
        PID:3304
    - - C:\Users\Admin\AppData\Roaming\remcos\mstsc.exe
        
        "C:\Users\Admin\AppData\Roaming\remcos\mstsc.exe"
        5⤵
        Executes dropped EXE
        Adds Run key to start application
        System Location Discovery: System Language Discovery
        Suspicious use of SetWindowsHookEx
        
        PID:608

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

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

Remote System Discovery

T1018

System Information Discovery

T1082

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

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\Ab.exe

Filesize
45KB

MD5
855075698e4f11e8089f881c4b0237f8

SHA1
972785092ec9ba946fa90ad50198bc6f7bf5b234

SHA256
ab63fbbedf5b5ad5be373fb11ee84284efca4a58f6a34e0c3d6b885c16a81fbe

SHA512
75ce9e53f0e187b0f841d3ee6ee7c17621f9242177b971631c956b061c86447bfac949274bf1fe9d5e42f32e206cca5d837cfa1288cba57e6a2a93bc429d98ef

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

Filesize
92KB

MD5
c8b3a05b20c5bdc2909cd4ec7e8509f3

SHA1
4797b824d0729d77b7d949e69819c36fa0bc0c15

SHA256
1d99246378ccf15778bd36cc3d85b09a6e53581c4cff5f441cc520dfb99896df

SHA512
307026de17c046cdd0ab56d869ba193e649e4459334b4d095c1e6274a7541f7b1c25c53de7e72139aaffde3a75e9243c91dfa3bd1d55183015d0abdf2e3e06cd

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

Filesize
98B

MD5
21bed91c3634ab147523bae86d71dc53

SHA1
0f81c75e634f83e300d33949bf48fb7e010d5480

SHA256
546eb97ad40e82000816ea08efeb65db8d17ab61e95bfb4b1df2bd8c33392968

SHA512
f4cd493bc9cba90d62efe5cf487c11679e05791797ff730a3cb168fe8a5a947c9965c2b71f378a70b805d1ef3e60834773eabba4fc82fe75d4c0a526ea04a38a

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp7E34.tmp

Filesize
1KB

MD5
07338dfe32dec1cf82ffc1ed3c7838c2

SHA1
28491f07a5af2bb7089c1f8987ebd36cee686033

SHA256
b756961dfaea1e4eddffe49c218c60816f8c37b96640b7ab638b22b3627eb84c

SHA512
da43e664d111f311b2112c1baad67a039fb4007fcecbd1445cb64a02e57f8e94cfa7200e9ec3ecf2840056691565c2e548abbbfc8806f90a8e0d771cd5f8bcf7

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpD443.tmp.bat

Filesize
151B

MD5
3119b6ff809675816d6514b8ee08c9cb

SHA1
35f2c5dcd68f0252071ca89346e72fd69f108bca

SHA256
5cdb99f249c99b0a2370d65ffc55d432a953c809ea850dad41e73e2b875609e9

SHA512
811d18e181391b9c51a551d84b3232d70deb3b969a0e8aeaf3ae43635f90790134f2f3dc436a45b6c4a13121929775564b57d2ac897995eb22cec1b87535f1cb

Download Submit
memory/3768-42-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/3768-18-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/3768-15-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/4240-41-0x0000000000DE0000-0x0000000000DF2000-memory.dmp

Filesize
72KB

Download
memory/4540-10-0x0000000006620000-0x000000000669E000-memory.dmp

Filesize
504KB

Download
memory/4540-0-0x000000007456E000-0x000000007456F000-memory.dmp

Filesize
4KB

Download
memory/4540-11-0x00000000064E0000-0x0000000006516000-memory.dmp

Filesize
216KB

Download
memory/4540-9-0x0000000074560000-0x0000000074D10000-memory.dmp

Filesize
7.7MB

Download
memory/4540-8-0x000000007456E000-0x000000007456F000-memory.dmp

Filesize
4KB

Download
memory/4540-7-0x0000000006050000-0x00000000060EC000-memory.dmp

Filesize
624KB

Download
memory/4540-22-0x0000000074560000-0x0000000074D10000-memory.dmp

Filesize
7.7MB

Download
memory/4540-6-0x0000000005FA0000-0x0000000005FA8000-memory.dmp

Filesize
32KB

Download
memory/4540-4-0x0000000004DA0000-0x0000000004DAA000-memory.dmp

Filesize
40KB

Download
memory/4540-5-0x0000000074560000-0x0000000074D10000-memory.dmp

Filesize
7.7MB

Download
memory/4540-3-0x0000000004DD0000-0x0000000004E62000-memory.dmp

Filesize
584KB

Download
memory/4540-2-0x00000000052E0000-0x0000000005884000-memory.dmp

Filesize
5.6MB

Download
memory/4540-1-0x0000000000320000-0x0000000000390000-memory.dmp

Filesize
448KB

Download