asyncrat | 74615bedcd52ff089b0ed9dede11c46cd27de39b0b52c309ad71175e79e53868

Analysis

max time kernel
145s
max time network
149s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
08-12-2024 03:46

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General

Target

d516c57c54c6c65ff050e16e871e71e2_JaffaCakes118.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 discovery persistence rat

Malware Config

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
behavioral1/files/0x000a000000015d03-27.dat	family_asyncrat

Executes dropped EXE 4 IoCs

pid	Process
2036	Ab.exe
2740	BB.exe
1656	mstsc.exe
1036	svchost.exe

Loads dropped DLL 6 IoCs

pid	Process
2344	d516c57c54c6c65ff050e16e871e71e2_JaffaCakes118.exe
2344	d516c57c54c6c65ff050e16e871e71e2_JaffaCakes118.exe
2344	d516c57c54c6c65ff050e16e871e71e2_JaffaCakes118.exe
1020	cmd.exe
1020	cmd.exe
580	cmd.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-1-5-21-4177215427-74451935-3209572229-1000\Software\Microsoft\Windows\CurrentVersion\Run\remcos = "\"C:\\Users\\Admin\\AppData\\Roaming\\remcos\\mstsc.exe\""	mstsc.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4177215427-74451935-3209572229-1000\Software\Microsoft\Windows\CurrentVersion\Run\remcos = "\"C:\\Users\\Admin\\AppData\\Roaming\\remcos\\mstsc.exe\""	BB.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1876 set thread context of 2344	1876	d516c57c54c6c65ff050e16e871e71e2_JaffaCakes118.exe	32

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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	d516c57c54c6c65ff050e16e871e71e2_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	d516c57c54c6c65ff050e16e871e71e2_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	BB.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	mstsc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Ab.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.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
1304	PING.EXE

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1404	timeout.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1304	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
2216	schtasks.exe
2540	schtasks.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1876	d516c57c54c6c65ff050e16e871e71e2_JaffaCakes118.exe
2036	Ab.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1876	d516c57c54c6c65ff050e16e871e71e2_JaffaCakes118.exe
Token: SeDebugPrivilege	2036	Ab.exe
Token: SeDebugPrivilege	1036	svchost.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2344	d516c57c54c6c65ff050e16e871e71e2_JaffaCakes118.exe
1656	mstsc.exe

Suspicious use of WriteProcessMemory 55 IoCs

description	pid	Process	procid_target
PID 1876 wrote to memory of 2216	1876	d516c57c54c6c65ff050e16e871e71e2_JaffaCakes118.exe	30
PID 1876 wrote to memory of 2216	1876	d516c57c54c6c65ff050e16e871e71e2_JaffaCakes118.exe	30
PID 1876 wrote to memory of 2216	1876	d516c57c54c6c65ff050e16e871e71e2_JaffaCakes118.exe	30
PID 1876 wrote to memory of 2216	1876	d516c57c54c6c65ff050e16e871e71e2_JaffaCakes118.exe	30
PID 1876 wrote to memory of 2344	1876	d516c57c54c6c65ff050e16e871e71e2_JaffaCakes118.exe	32
PID 1876 wrote to memory of 2344	1876	d516c57c54c6c65ff050e16e871e71e2_JaffaCakes118.exe	32
PID 1876 wrote to memory of 2344	1876	d516c57c54c6c65ff050e16e871e71e2_JaffaCakes118.exe	32
PID 1876 wrote to memory of 2344	1876	d516c57c54c6c65ff050e16e871e71e2_JaffaCakes118.exe	32
PID 1876 wrote to memory of 2344	1876	d516c57c54c6c65ff050e16e871e71e2_JaffaCakes118.exe	32
PID 1876 wrote to memory of 2344	1876	d516c57c54c6c65ff050e16e871e71e2_JaffaCakes118.exe	32
PID 1876 wrote to memory of 2344	1876	d516c57c54c6c65ff050e16e871e71e2_JaffaCakes118.exe	32
PID 1876 wrote to memory of 2344	1876	d516c57c54c6c65ff050e16e871e71e2_JaffaCakes118.exe	32
PID 2344 wrote to memory of 2036	2344	d516c57c54c6c65ff050e16e871e71e2_JaffaCakes118.exe	33
PID 2344 wrote to memory of 2036	2344	d516c57c54c6c65ff050e16e871e71e2_JaffaCakes118.exe	33
PID 2344 wrote to memory of 2036	2344	d516c57c54c6c65ff050e16e871e71e2_JaffaCakes118.exe	33
PID 2344 wrote to memory of 2036	2344	d516c57c54c6c65ff050e16e871e71e2_JaffaCakes118.exe	33
PID 2344 wrote to memory of 2740	2344	d516c57c54c6c65ff050e16e871e71e2_JaffaCakes118.exe	34
PID 2344 wrote to memory of 2740	2344	d516c57c54c6c65ff050e16e871e71e2_JaffaCakes118.exe	34
PID 2344 wrote to memory of 2740	2344	d516c57c54c6c65ff050e16e871e71e2_JaffaCakes118.exe	34
PID 2344 wrote to memory of 2740	2344	d516c57c54c6c65ff050e16e871e71e2_JaffaCakes118.exe	34
PID 2740 wrote to memory of 1020	2740	BB.exe	35
PID 2740 wrote to memory of 1020	2740	BB.exe	35
PID 2740 wrote to memory of 1020	2740	BB.exe	35
PID 2740 wrote to memory of 1020	2740	BB.exe	35
PID 2740 wrote to memory of 1020	2740	BB.exe	35
PID 2740 wrote to memory of 1020	2740	BB.exe	35
PID 2740 wrote to memory of 1020	2740	BB.exe	35
PID 1020 wrote to memory of 1304	1020	cmd.exe	37
PID 1020 wrote to memory of 1304	1020	cmd.exe	37
PID 1020 wrote to memory of 1304	1020	cmd.exe	37
PID 1020 wrote to memory of 1304	1020	cmd.exe	37
PID 1020 wrote to memory of 1656	1020	cmd.exe	38
PID 1020 wrote to memory of 1656	1020	cmd.exe	38
PID 1020 wrote to memory of 1656	1020	cmd.exe	38
PID 1020 wrote to memory of 1656	1020	cmd.exe	38
PID 2036 wrote to memory of 2808	2036	Ab.exe	39
PID 2036 wrote to memory of 2808	2036	Ab.exe	39
PID 2036 wrote to memory of 2808	2036	Ab.exe	39
PID 2036 wrote to memory of 2808	2036	Ab.exe	39
PID 2036 wrote to memory of 580	2036	Ab.exe	41
PID 2036 wrote to memory of 580	2036	Ab.exe	41
PID 2036 wrote to memory of 580	2036	Ab.exe	41
PID 2036 wrote to memory of 580	2036	Ab.exe	41
PID 2808 wrote to memory of 2540	2808	cmd.exe	43
PID 2808 wrote to memory of 2540	2808	cmd.exe	43
PID 2808 wrote to memory of 2540	2808	cmd.exe	43
PID 2808 wrote to memory of 2540	2808	cmd.exe	43
PID 580 wrote to memory of 1404	580	cmd.exe	44
PID 580 wrote to memory of 1404	580	cmd.exe	44
PID 580 wrote to memory of 1404	580	cmd.exe	44
PID 580 wrote to memory of 1404	580	cmd.exe	44
PID 580 wrote to memory of 1036	580	cmd.exe	45
PID 580 wrote to memory of 1036	580	cmd.exe	45
PID 580 wrote to memory of 1036	580	cmd.exe	45
PID 580 wrote to memory of 1036	580	cmd.exe	45

C:\Users\Admin\AppData\Local\Temp\d516c57c54c6c65ff050e16e871e71e2_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\d516c57c54c6c65ff050e16e871e71e2_JaffaCakes118.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1876
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\KHkWwNhPvyrETo" /XML "C:\Users\Admin\AppData\Local\Temp\tmp85D3.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:2216
- C:\Users\Admin\AppData\Local\Temp\d516c57c54c6c65ff050e16e871e71e2_JaffaCakes118.exe
  "{path}"
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2344
- - C:\Users\Admin\AppData\Local\Temp\Ab.exe
    "C:\Users\Admin\AppData\Local\Temp\Ab.exe" 0
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:2036
  - - 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:2808
    - - 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:2540
  - - C:\Windows\SysWOW64\cmd.exe
      cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpD94F.tmp.bat""
      4⤵
      Loads dropped DLL
      System Location Discovery: System Language Discovery
      Suspicious use of WriteProcessMemory
      PID:580
    - - C:\Windows\SysWOW64\timeout.exe
        
        timeout 3
        5⤵
        System Location Discovery: System Language Discovery
        Delays execution with timeout.exe
        
        PID:1404
    - - 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:1036
- - C:\Users\Admin\AppData\Local\Temp\BB.exe
    "C:\Users\Admin\AppData\Local\Temp\BB.exe" 0
    3⤵
    - Executes dropped EXE
    - Adds Run key to start application
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2740
  - - C:\Windows\SysWOW64\cmd.exe
      cmd /c ""C:\Users\Admin\AppData\Local\Temp\install.bat" "
      4⤵
      Loads dropped DLL
      System Location Discovery: System Language Discovery
      Suspicious use of WriteProcessMemory
      PID:1020
    - - 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:1304
    - - 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:1656

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

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\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\tmp85D3.tmp

Filesize
1KB

MD5
c6660713bbfba137b9093ca9a6b8def4

SHA1
c3a5e6c3279cc64f6ad95ff7e2f01c00cb99181d

SHA256
9fb6d28efbe5cb9cf1acb36d4056dd527a6057ef49d67fd6ae6cdfe2887013c2

SHA512
b771006c1b8c36be61073faec8ea7b44e33451c61306ba68d750d9999f4bcbd02661d5442199b3d5bc6f1990a036dbdafe973dfb360d1f9fce5eeb7374fbeeaa

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpD94F.tmp.bat

Filesize
151B

MD5
d32a7e9b182b89147cbac1db76e04b83

SHA1
a0bcf50ebf14f6a93dd82989c78a1391ba831d84

SHA256
15d7846d109c47fbfcf1a5a8a908bf5596ebdb0a24105fdb352a2c916ff3def1

SHA512
334e1ff232dd3ac368515f95497480914f52f978ece0c4a01b779e6b2af9da1adfe07fc0530cd5a806e7617e740800b2f051658ae24120b5b2ec5692035fe66a

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

Filesize
45KB

MD5
855075698e4f11e8089f881c4b0237f8

SHA1
972785092ec9ba946fa90ad50198bc6f7bf5b234

SHA256
ab63fbbedf5b5ad5be373fb11ee84284efca4a58f6a34e0c3d6b885c16a81fbe

SHA512
75ce9e53f0e187b0f841d3ee6ee7c17621f9242177b971631c956b061c86447bfac949274bf1fe9d5e42f32e206cca5d837cfa1288cba57e6a2a93bc429d98ef

Download Submit
memory/1036-72-0x00000000001F0000-0x0000000000202000-memory.dmp

Filesize
72KB

Download
memory/1876-25-0x0000000074C50000-0x000000007533E000-memory.dmp

Filesize
6.9MB

Download
memory/1876-0-0x0000000074C5E000-0x0000000074C5F000-memory.dmp

Filesize
4KB

Download
memory/1876-6-0x0000000005720000-0x000000000579E000-memory.dmp

Filesize
504KB

Download
memory/1876-1-0x0000000000A90000-0x0000000000B00000-memory.dmp

Filesize
448KB

Download
memory/1876-2-0x0000000074C50000-0x000000007533E000-memory.dmp

Filesize
6.9MB

Download
memory/1876-3-0x0000000000420000-0x0000000000428000-memory.dmp

Filesize
32KB

Download
memory/1876-7-0x0000000000930000-0x0000000000966000-memory.dmp

Filesize
216KB

Download
memory/1876-4-0x0000000074C5E000-0x0000000074C5F000-memory.dmp

Filesize
4KB

Download
memory/1876-5-0x0000000074C50000-0x000000007533E000-memory.dmp

Filesize
6.9MB

Download
memory/2036-42-0x00000000001B0000-0x00000000001C2000-memory.dmp

Filesize
72KB

Download
memory/2344-15-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/2344-41-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/2344-17-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2344-21-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/2344-19-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/2344-13-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/2344-11-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download