asyncrat | 74615bedcd52ff089b0ed9dede11c46cd27de39b0b52c309ad71175e79e53868

Analysis

max time kernel
147s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-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
behavioral2/files/0x00290000000233b7-26.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-1-5-21-4050598569-1597076380-177084960-1000\Control Panel\International\Geo\Nation	d516c57c54c6c65ff050e16e871e71e2_JaffaCakes118.exe
Key value queried	\REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\Control Panel\International\Geo\Nation	BB.exe
Key value queried	\REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\Control Panel\International\Geo\Nation	Ab.exe
Key value queried	\REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\Control Panel\International\Geo\Nation	d516c57c54c6c65ff050e16e871e71e2_JaffaCakes118.exe

Executes dropped EXE 4 IoCs

pid	Process
2900	Ab.exe
752	BB.exe
1832	mstsc.exe
720	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-1-5-21-4050598569-1597076380-177084960-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\remcos = "\"C:\\Users\\Admin\\AppData\\Roaming\\remcos\\mstsc.exe\""	mstsc.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\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 1504 set thread context of 4764	1504	d516c57c54c6c65ff050e16e871e71e2_JaffaCakes118.exe	94

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	BB.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	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	cmd.exe
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	Ab.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
1224	PING.EXE

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
3068	timeout.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1224	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
4360	schtasks.exe
1108	schtasks.exe

Suspicious behavior: EnumeratesProcesses 22 IoCs

pid	Process
1504	d516c57c54c6c65ff050e16e871e71e2_JaffaCakes118.exe
1504	d516c57c54c6c65ff050e16e871e71e2_JaffaCakes118.exe
1504	d516c57c54c6c65ff050e16e871e71e2_JaffaCakes118.exe
2900	Ab.exe
2900	Ab.exe
2900	Ab.exe
2900	Ab.exe
2900	Ab.exe
2900	Ab.exe
2900	Ab.exe
2900	Ab.exe
2900	Ab.exe
2900	Ab.exe
2900	Ab.exe
2900	Ab.exe
2900	Ab.exe
2900	Ab.exe
2900	Ab.exe
2900	Ab.exe
2900	Ab.exe
2900	Ab.exe
2900	Ab.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1504	d516c57c54c6c65ff050e16e871e71e2_JaffaCakes118.exe
Token: SeDebugPrivilege	2900	Ab.exe
Token: SeDebugPrivilege	720	svchost.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4764	d516c57c54c6c65ff050e16e871e71e2_JaffaCakes118.exe
1832	mstsc.exe

Suspicious use of WriteProcessMemory 43 IoCs

description	pid	Process	procid_target
PID 1504 wrote to memory of 4360	1504	d516c57c54c6c65ff050e16e871e71e2_JaffaCakes118.exe	91
PID 1504 wrote to memory of 4360	1504	d516c57c54c6c65ff050e16e871e71e2_JaffaCakes118.exe	91
PID 1504 wrote to memory of 4360	1504	d516c57c54c6c65ff050e16e871e71e2_JaffaCakes118.exe	91
PID 1504 wrote to memory of 4200	1504	d516c57c54c6c65ff050e16e871e71e2_JaffaCakes118.exe	93
PID 1504 wrote to memory of 4200	1504	d516c57c54c6c65ff050e16e871e71e2_JaffaCakes118.exe	93
PID 1504 wrote to memory of 4200	1504	d516c57c54c6c65ff050e16e871e71e2_JaffaCakes118.exe	93
PID 1504 wrote to memory of 4764	1504	d516c57c54c6c65ff050e16e871e71e2_JaffaCakes118.exe	94
PID 1504 wrote to memory of 4764	1504	d516c57c54c6c65ff050e16e871e71e2_JaffaCakes118.exe	94
PID 1504 wrote to memory of 4764	1504	d516c57c54c6c65ff050e16e871e71e2_JaffaCakes118.exe	94
PID 1504 wrote to memory of 4764	1504	d516c57c54c6c65ff050e16e871e71e2_JaffaCakes118.exe	94
PID 1504 wrote to memory of 4764	1504	d516c57c54c6c65ff050e16e871e71e2_JaffaCakes118.exe	94
PID 1504 wrote to memory of 4764	1504	d516c57c54c6c65ff050e16e871e71e2_JaffaCakes118.exe	94
PID 1504 wrote to memory of 4764	1504	d516c57c54c6c65ff050e16e871e71e2_JaffaCakes118.exe	94
PID 4764 wrote to memory of 2900	4764	d516c57c54c6c65ff050e16e871e71e2_JaffaCakes118.exe	95
PID 4764 wrote to memory of 2900	4764	d516c57c54c6c65ff050e16e871e71e2_JaffaCakes118.exe	95
PID 4764 wrote to memory of 2900	4764	d516c57c54c6c65ff050e16e871e71e2_JaffaCakes118.exe	95
PID 4764 wrote to memory of 752	4764	d516c57c54c6c65ff050e16e871e71e2_JaffaCakes118.exe	96
PID 4764 wrote to memory of 752	4764	d516c57c54c6c65ff050e16e871e71e2_JaffaCakes118.exe	96
PID 4764 wrote to memory of 752	4764	d516c57c54c6c65ff050e16e871e71e2_JaffaCakes118.exe	96
PID 752 wrote to memory of 1632	752	BB.exe	97
PID 752 wrote to memory of 1632	752	BB.exe	97
PID 752 wrote to memory of 1632	752	BB.exe	97
PID 1632 wrote to memory of 1224	1632	cmd.exe	99
PID 1632 wrote to memory of 1224	1632	cmd.exe	99
PID 1632 wrote to memory of 1224	1632	cmd.exe	99
PID 1632 wrote to memory of 1832	1632	cmd.exe	100
PID 1632 wrote to memory of 1832	1632	cmd.exe	100
PID 1632 wrote to memory of 1832	1632	cmd.exe	100
PID 2900 wrote to memory of 2568	2900	Ab.exe	101
PID 2900 wrote to memory of 2568	2900	Ab.exe	101
PID 2900 wrote to memory of 2568	2900	Ab.exe	101
PID 2900 wrote to memory of 4076	2900	Ab.exe	102
PID 2900 wrote to memory of 4076	2900	Ab.exe	102
PID 2900 wrote to memory of 4076	2900	Ab.exe	102
PID 4076 wrote to memory of 3068	4076	cmd.exe	105
PID 4076 wrote to memory of 3068	4076	cmd.exe	105
PID 4076 wrote to memory of 3068	4076	cmd.exe	105
PID 2568 wrote to memory of 1108	2568	cmd.exe	106
PID 2568 wrote to memory of 1108	2568	cmd.exe	106
PID 2568 wrote to memory of 1108	2568	cmd.exe	106
PID 4076 wrote to memory of 720	4076	cmd.exe	107
PID 4076 wrote to memory of 720	4076	cmd.exe	107
PID 4076 wrote to memory of 720	4076	cmd.exe	107

C:\Users\Admin\AppData\Local\Temp\d516c57c54c6c65ff050e16e871e71e2_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\d516c57c54c6c65ff050e16e871e71e2_JaffaCakes118.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:1504
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\KHkWwNhPvyrETo" /XML "C:\Users\Admin\AppData\Local\Temp\tmpADBF.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:4360
- C:\Users\Admin\AppData\Local\Temp\d516c57c54c6c65ff050e16e871e71e2_JaffaCakes118.exe
  "{path}"
  2⤵
  PID:4200
- C:\Users\Admin\AppData\Local\Temp\d516c57c54c6c65ff050e16e871e71e2_JaffaCakes118.exe
  "{path}"
  2⤵
  - Checks computer location settings
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4764
- - 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:2900
  - - 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:2568
    - - 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:1108
  - - C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp45B.tmp.bat""
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious use of WriteProcessMemory
      PID:4076
    - - C:\Windows\SysWOW64\timeout.exe
        
        timeout 3
        5⤵
        System Location Discovery: System Language Discovery
        Delays execution with timeout.exe
        
        PID:3068
    - - 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:720
- - 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:1632
    - - 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:1224
    - - 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:1832

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\tmp45B.tmp.bat

Filesize
150B

MD5
8045c37c736313a1f66933875d21aea7

SHA1
757dedef2e2a4d81a4b42d54b9ff2c077dbe0f9d

SHA256
3034fccc8b1f7b319ef98341762207335203f02e3a5976a1479608304dd2c551

SHA512
863066a216d5b7f28434d1e68b472cdf08891c47b0e0ef717029c13e5166ad7e335ae0b631ec1362cd82e7a0c365d8d176845f49fc1cf6049897b6c59801ed18

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

Filesize
1KB

MD5
38d3c3eabe1ecd1ee02dbc2dfb1650c0

SHA1
8572f6bac1bc49be080ccd1e79250b28e5d6fbec

SHA256
931b8d6160377338f0ba7437611df80545923920bac1da0473cefb4477b7c2cc

SHA512
ffa8df913d65ff22622595749bbfb96df2acf1f506f1ca7e643bf9e66c189876879588567dbe7b48d7d67d9a6702ec5508b30fc9c1084d41bc5487b162fc471d

Download Submit
memory/1504-10-0x0000000007170000-0x00000000071EE000-memory.dmp

Filesize
504KB

Download
memory/1504-6-0x0000000005AB0000-0x0000000005AB8000-memory.dmp

Filesize
32KB

Download
memory/1504-7-0x0000000006BE0000-0x0000000006C7C000-memory.dmp

Filesize
624KB

Download
memory/1504-8-0x000000007539E000-0x000000007539F000-memory.dmp

Filesize
4KB

Download
memory/1504-9-0x0000000075390000-0x0000000075B40000-memory.dmp

Filesize
7.7MB

Download
memory/1504-0-0x000000007539E000-0x000000007539F000-memory.dmp

Filesize
4KB

Download
memory/1504-11-0x0000000006FF0000-0x0000000007026000-memory.dmp

Filesize
216KB

Download
memory/1504-5-0x0000000075390000-0x0000000075B40000-memory.dmp

Filesize
7.7MB

Download
memory/1504-1-0x0000000000B00000-0x0000000000B70000-memory.dmp

Filesize
448KB

Download
memory/1504-2-0x0000000005B20000-0x00000000060C4000-memory.dmp

Filesize
5.6MB

Download
memory/1504-22-0x0000000075390000-0x0000000075B40000-memory.dmp

Filesize
7.7MB

Download
memory/1504-4-0x0000000005520000-0x000000000552A000-memory.dmp

Filesize
40KB

Download
memory/1504-3-0x0000000005570000-0x0000000005602000-memory.dmp

Filesize
584KB

Download
memory/2900-41-0x0000000000990000-0x00000000009A2000-memory.dmp

Filesize
72KB

Download
memory/2900-42-0x000000007488E000-0x000000007488F000-memory.dmp

Filesize
4KB

Download
memory/4764-43-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/4764-17-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/4764-15-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download