asyncrat | 58a07549993c34caf8617e6cb341b44ceca162106b501fee09629936bad7bb51

Analysis

max time kernel
151s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
13-01-2024 11:51

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General

Target

58d9e7016bb1ceef2c36ede58202d170.exe
Size

491KB
MD5

58d9e7016bb1ceef2c36ede58202d170
SHA1

95c9defb36b6ba08c78ad6068a2766dad1e33512
SHA256

58a07549993c34caf8617e6cb341b44ceca162106b501fee09629936bad7bb51
SHA512

aa688b35cd42d915d4503b1078535dc14bcfcbe7d30b8874dbc173cfc662685cc07a5d256b8452c1d113fdcebe77e074f60fb2d789d664ff401a94444a162e95
SSDEEP

12288:vLDAIDCETPv7rrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrUrrrrrrrrrrrrrrrf:YIDCETPzrrrrrrrrrrrrrrrrrrrrrrrg

Score

10^/10

asyncrat default persistence rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

127.0.0.1:6606

127.0.0.1:7707

127.0.0.1:8808

Mutex

AsyncMutex_6SI8OkPnk

Attributes

delay
3
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

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral2/memory/1368-7-0x0000000000400000-0x0000000000446000-memory.dmp	asyncrat

Checks computer location settings 2 TTPs 1 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-1-5-21-1815711207-1844170477-3539718864-1000\Control Panel\International\Geo\Nation	58d9e7016bb1ceef2c36ede58202d170.exe

Executes dropped EXE 3 IoCs

pid	Process
1768	svchost.exe
2036	svchost.exe
2804	svchost.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1815711207-1844170477-3539718864-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\Windows Services = "C:\\Users\\Admin\\AppData\\Roaming\\Windows Update Folder\\Windows Update.exe"	58d9e7016bb1ceef2c36ede58202d170.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 3376 set thread context of 1368	3376	58d9e7016bb1ceef2c36ede58202d170.exe	90
PID 1768 set thread context of 2804	1768	svchost.exe	106

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 1 IoCs

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

persistence

Scheduled Task/Job

T1053

pid	Process
1732	schtasks.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
4820	timeout.exe

Suspicious behavior: EnumeratesProcesses 25 IoCs

pid	Process
1368	58d9e7016bb1ceef2c36ede58202d170.exe
1368	58d9e7016bb1ceef2c36ede58202d170.exe
1368	58d9e7016bb1ceef2c36ede58202d170.exe
1368	58d9e7016bb1ceef2c36ede58202d170.exe
1368	58d9e7016bb1ceef2c36ede58202d170.exe
1368	58d9e7016bb1ceef2c36ede58202d170.exe
1368	58d9e7016bb1ceef2c36ede58202d170.exe
1368	58d9e7016bb1ceef2c36ede58202d170.exe
1368	58d9e7016bb1ceef2c36ede58202d170.exe
1368	58d9e7016bb1ceef2c36ede58202d170.exe
1368	58d9e7016bb1ceef2c36ede58202d170.exe
1368	58d9e7016bb1ceef2c36ede58202d170.exe
1368	58d9e7016bb1ceef2c36ede58202d170.exe
1368	58d9e7016bb1ceef2c36ede58202d170.exe
1368	58d9e7016bb1ceef2c36ede58202d170.exe
1368	58d9e7016bb1ceef2c36ede58202d170.exe
1368	58d9e7016bb1ceef2c36ede58202d170.exe
1368	58d9e7016bb1ceef2c36ede58202d170.exe
1368	58d9e7016bb1ceef2c36ede58202d170.exe
1368	58d9e7016bb1ceef2c36ede58202d170.exe
1368	58d9e7016bb1ceef2c36ede58202d170.exe
1368	58d9e7016bb1ceef2c36ede58202d170.exe
1368	58d9e7016bb1ceef2c36ede58202d170.exe
1768	svchost.exe
1768	svchost.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1368	58d9e7016bb1ceef2c36ede58202d170.exe
Token: SeDebugPrivilege	1768	svchost.exe
Token: SeDebugPrivilege	2804	svchost.exe

Suspicious use of WriteProcessMemory 34 IoCs

description	pid	Process	procid_target
PID 3376 wrote to memory of 1368	3376	58d9e7016bb1ceef2c36ede58202d170.exe	90
PID 3376 wrote to memory of 1368	3376	58d9e7016bb1ceef2c36ede58202d170.exe	90
PID 3376 wrote to memory of 1368	3376	58d9e7016bb1ceef2c36ede58202d170.exe	90
PID 3376 wrote to memory of 1368	3376	58d9e7016bb1ceef2c36ede58202d170.exe	90
PID 3376 wrote to memory of 1368	3376	58d9e7016bb1ceef2c36ede58202d170.exe	90
PID 3376 wrote to memory of 1368	3376	58d9e7016bb1ceef2c36ede58202d170.exe	90
PID 3376 wrote to memory of 1368	3376	58d9e7016bb1ceef2c36ede58202d170.exe	90
PID 3376 wrote to memory of 1368	3376	58d9e7016bb1ceef2c36ede58202d170.exe	90
PID 1368 wrote to memory of 3344	1368	58d9e7016bb1ceef2c36ede58202d170.exe	101
PID 1368 wrote to memory of 3344	1368	58d9e7016bb1ceef2c36ede58202d170.exe	101
PID 1368 wrote to memory of 3344	1368	58d9e7016bb1ceef2c36ede58202d170.exe	101
PID 1368 wrote to memory of 2184	1368	58d9e7016bb1ceef2c36ede58202d170.exe	96
PID 1368 wrote to memory of 2184	1368	58d9e7016bb1ceef2c36ede58202d170.exe	96
PID 1368 wrote to memory of 2184	1368	58d9e7016bb1ceef2c36ede58202d170.exe	96
PID 3344 wrote to memory of 1732	3344	cmd.exe	100
PID 3344 wrote to memory of 1732	3344	cmd.exe	100
PID 3344 wrote to memory of 1732	3344	cmd.exe	100
PID 2184 wrote to memory of 4820	2184	cmd.exe	99
PID 2184 wrote to memory of 4820	2184	cmd.exe	99
PID 2184 wrote to memory of 4820	2184	cmd.exe	99
PID 2184 wrote to memory of 1768	2184	cmd.exe	103
PID 2184 wrote to memory of 1768	2184	cmd.exe	103
PID 2184 wrote to memory of 1768	2184	cmd.exe	103
PID 1768 wrote to memory of 2036	1768	svchost.exe	104
PID 1768 wrote to memory of 2036	1768	svchost.exe	104
PID 1768 wrote to memory of 2036	1768	svchost.exe	104
PID 1768 wrote to memory of 2804	1768	svchost.exe	106
PID 1768 wrote to memory of 2804	1768	svchost.exe	106
PID 1768 wrote to memory of 2804	1768	svchost.exe	106
PID 1768 wrote to memory of 2804	1768	svchost.exe	106
PID 1768 wrote to memory of 2804	1768	svchost.exe	106
PID 1768 wrote to memory of 2804	1768	svchost.exe	106
PID 1768 wrote to memory of 2804	1768	svchost.exe	106
PID 1768 wrote to memory of 2804	1768	svchost.exe	106

C:\Users\Admin\AppData\Local\Temp\58d9e7016bb1ceef2c36ede58202d170.exe
"C:\Users\Admin\AppData\Local\Temp\58d9e7016bb1ceef2c36ede58202d170.exe"
1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3376
- C:\Users\Admin\AppData\Local\Temp\58d9e7016bb1ceef2c36ede58202d170.exe
  "C:\Users\Admin\AppData\Local\Temp\58d9e7016bb1ceef2c36ede58202d170.exe"
  2⤵
  - Checks computer location settings
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1368
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp9337.tmp.bat""
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2184
  - - C:\Windows\SysWOW64\timeout.exe
      timeout 3
      4⤵
      Delays execution with timeout.exe
      PID:4820
  - - C:\Users\Admin\AppData\Roaming\svchost.exe
      "C:\Users\Admin\AppData\Roaming\svchost.exe"
      4⤵
      Executes dropped EXE
      Suspicious use of SetThreadContext
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:1768
    - - C:\Users\Admin\AppData\Roaming\svchost.exe
        
        "C:\Users\Admin\AppData\Roaming\svchost.exe"
        5⤵
        Executes dropped EXE
        
        PID:2036
    - - C:\Users\Admin\AppData\Roaming\svchost.exe
        
        "C:\Users\Admin\AppData\Roaming\svchost.exe"
        5⤵
        Executes dropped EXE
        Suspicious use of AdjustPrivilegeToken
        
        PID:2804
- - 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
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3344

C:\Windows\SysWOW64\schtasks.exe
schtasks /create /f /sc onlogon /rl highest /tn "svchost" /tr '"C:\Users\Admin\AppData\Roaming\svchost.exe"'
1⤵
- Creates scheduled task(s)
PID:1732

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\58d9e7016bb1ceef2c36ede58202d170.exe.log

Filesize
507B

MD5
76ffb2f33cb32ade8fc862a67599e9d8

SHA1
920cc4ab75b36d2f9f6e979b74db568973c49130

SHA256
f1a3724670e3379318ec9c73f6f39058cab0ab013ba3cd90c047c3d701362310

SHA512
f33502c2e1bb30c05359bfc6819ca934642a1e01874e3060349127d792694d56ad22fccd6c9477b8ee50d66db35785779324273f509576b48b7f85577e001b4e

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp9337.tmp.bat

Filesize
151B

MD5
29a1c615a4a627c45b3a492239bee724

SHA1
726d52f164ff4eafb036de0ac52c032d84c83690

SHA256
acfec632a6c00b1703ae71b1c21dafe3909049618e942f90e11f07cbe19c1b1b

SHA512
9679b9379eaa9bf1f1be16e9b98c6feba4163bf9690d27a9a757095937aa98946f5d696ba30b39ff79f4fdfd5c92f7c51bf462dd3991a649be98732e4a733658

Download Submit
C:\Users\Admin\AppData\Roaming\svchost.exe

Filesize
283KB

MD5
fc64e37f72750a09acbf4222c4777123

SHA1
f5856c37ac40ee4ef2a1b8a6cdfb86a48e0ce84e

SHA256
6943f8074dee431a49f04c47d04738a2a159b296af921c50bcf3c5a97f0eca32

SHA512
b248dbe8f42b334cac0af71376eb87775f7336f9c681351edad7ffadd3f61c81a898ebb7935587fd9bd5aa553ab17966f0f23129a9b47c2fc18cb414f540e0d2

Download Submit
C:\Users\Admin\AppData\Roaming\svchost.exe

Filesize
72KB

MD5
5c9337b5d20d72a12e4ef89b87b1d2f7

SHA1
ab23d9d1d85f689b83f568eb9a3b28ab40d37565

SHA256
96572ae08b4713c9088e69127e6b4c7f8c681df85b16e0353a6f60d2a58f36da

SHA512
39b1b1310ce634690cef228c9d97515522464ade34e8722e5cd4ac2b1383a9cdbe8009bb8bc3dd684c260460644a5fb2715d4d5017e3e7302c32dbad03bd0647

Download Submit
C:\Users\Admin\AppData\Roaming\svchost.exe

Filesize
100KB

MD5
859e1b22c92d8c9a80834808c48e60c6

SHA1
3bf9113abd225c9a6179a8de85864c6a09f2cbcb

SHA256
d33ce726ca7fc272c6f124abed69233312ca6a5461e13e1409324ccf63b584a8

SHA512
91043ec2374258b7e5aec73e9dec94cfca1adc6c856d618c71d74ab315ffaf47ccd7f3ca7fef8550bc64dcb703ba7fe77fda7d5784a09b5e8acd714a3df4f3c4

Download Submit
C:\Users\Admin\AppData\Roaming\svchost.exe

Filesize
147KB

MD5
32cf78283ec6387eec319a0ff01bec35

SHA1
903ad8a3e8d3fe92af708ca1cd9e44e5ae0c0224

SHA256
c75fdbdc8d8511a9581b1390e5c172e469132ea92b98fabede728e96dde74925

SHA512
97aa06cf9c52a6441907d07591c8ef3afd2f55bd97c1783406491dd90f3baa1330368594d8084038381b6c0fc7a047cf90057bd0e4cfee830597967743571f32

Download Submit
memory/1368-11-0x0000000074EA0000-0x0000000075650000-memory.dmp

Filesize
7.7MB

Download
memory/1368-13-0x0000000005510000-0x0000000005520000-memory.dmp

Filesize
64KB

Download
memory/1368-7-0x0000000000400000-0x0000000000446000-memory.dmp

Filesize
280KB

Download
memory/1368-17-0x0000000074EA0000-0x0000000075650000-memory.dmp

Filesize
7.7MB

Download
memory/1768-22-0x0000000074EA0000-0x0000000075650000-memory.dmp

Filesize
7.7MB

Download
memory/1768-29-0x0000000074EA0000-0x0000000075650000-memory.dmp

Filesize
7.7MB

Download
memory/2804-26-0x0000000074EA0000-0x0000000075650000-memory.dmp

Filesize
7.7MB

Download
memory/2804-30-0x0000000074EA0000-0x0000000075650000-memory.dmp

Filesize
7.7MB

Download
memory/3376-0-0x0000000074EA0000-0x0000000075650000-memory.dmp

Filesize
7.7MB

Download
memory/3376-6-0x0000000002F30000-0x0000000002F3A000-memory.dmp

Filesize
40KB

Download
memory/3376-12-0x0000000074EA0000-0x0000000075650000-memory.dmp

Filesize
7.7MB

Download
memory/3376-4-0x00000000056E0000-0x000000000577C000-memory.dmp

Filesize
624KB

Download
memory/3376-3-0x00000000055A0000-0x0000000005632000-memory.dmp

Filesize
584KB

Download
memory/3376-9-0x00000000054F0000-0x0000000005500000-memory.dmp

Filesize
64KB

Download
memory/3376-2-0x0000000005B50000-0x00000000060F4000-memory.dmp

Filesize
5.6MB

Download
memory/3376-1-0x0000000000A80000-0x0000000000B00000-memory.dmp

Filesize
512KB

Download