asyncrat | cd635790fc3913e2133384ead8cd99fa23e22752d24614b2eab2d8e270ea8aa7

Analysis

max time kernel
130s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20230220-en
resource tags

arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
submitted
25/04/2023, 06:37

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General

Target
i.png.ps1
Size 220KB
Sample230425-hdhd3aag5w
SHA256 cd635790fc3913e2133384ead8cd99fa23e22752d24614b2eab2d8e270ea8aa7
MD5 15e5836259cb6f82595c9dee03914e12
SHA1 9d1747260f60f3dd615b3fedf3f82f6bab6e46a8
SHA512 5daa613c2c5e84159beaccad2742d05aaf392e7680bc291319f8bb75f71ee8d9bdaf65d696bc2ee4136549dd1135daa801ce0db4b24a0f3228e37f701c55a70e
SSDEEP 1536:WeMD10HxuHY05UIy4rpmLoKZqcxU7SHzqQHw7rRim3ve0pAGFBQDVWQIy9qzRZoe:Nk0t0iInKWQIySpfQNnDYjb31543Apd
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Version

| Edit 3LOSH RAT

Botnet

Default

45.80.158.237:5558

Mutex

AsyncMutex_6SI8OkPnk

Attributes

delay
3
install
false
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/4356-170-0x0000000000400000-0x0000000000416000-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-1-5-21-1675742406-747946869-1029867430-1000\Control Panel\International\Geo\Nation	WScript.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 844 set thread context of 4356	844	powershell.exe	98

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

T1053

pid	Process
460	schtasks.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2600	powershell.exe
2600	powershell.exe
844	powershell.exe
844	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2600	powershell.exe
Token: SeDebugPrivilege	844	powershell.exe
Token: SeDebugPrivilege	4356	RegSvcs.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 2600 wrote to memory of 460	2600	powershell.exe	89
PID 2600 wrote to memory of 460	2600	powershell.exe	89
PID 748 wrote to memory of 4352	748	WScript.exe	94
PID 748 wrote to memory of 4352	748	WScript.exe	94
PID 4352 wrote to memory of 3176	4352	cmd.exe	96
PID 4352 wrote to memory of 3176	4352	cmd.exe	96
PID 3176 wrote to memory of 844	3176	cmd.exe	97
PID 3176 wrote to memory of 844	3176	cmd.exe	97
PID 844 wrote to memory of 4356	844	powershell.exe	98
PID 844 wrote to memory of 4356	844	powershell.exe	98
PID 844 wrote to memory of 4356	844	powershell.exe	98
PID 844 wrote to memory of 4356	844	powershell.exe	98
PID 844 wrote to memory of 4356	844	powershell.exe	98
PID 844 wrote to memory of 4356	844	powershell.exe	98
PID 844 wrote to memory of 4356	844	powershell.exe	98
PID 844 wrote to memory of 4356	844	powershell.exe	98

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\i.png.ps1
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2600
- C:\Windows\system32\schtasks.exe
  "C:\Windows\system32\schtasks.exe" /create /sc minute /mo 2 /tn Nodejs /tr C:\ProgramData\e594\Nodejs.vbs
  2⤵
  - Creates scheduled task(s)
  PID:460

C:\Windows\System32\WScript.exe
C:\Windows\System32\WScript.exe "C:\ProgramData\e594\Nodejs.vbs"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:748
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\ProgramData\e594\1.bat" "
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4352
- - C:\Windows\system32\cmd.exe
    CMD /C POWERSHELL -NOP -WIND HIDDEN -eXEC BYPASS -NONI "C:\ProgramData\e594\py.ps1"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3176
  - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      POWERSHELL -NOP -WIND HIDDEN -eXEC BYPASS -NONI "C:\ProgramData\e594\py.ps1"
      4⤵
      Suspicious use of SetThreadContext
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:844
    - - C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
        
        "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe"
        5⤵
        Suspicious use of AdjustPrivilegeToken
        
        PID:4356

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

1.bat

Path C:\ProgramData\e594\1.bat
Size 98B
SHA256 33e582e0701b2bbede00d0ee503f3200e016028191b5616b87228139d007b441
MD5 2f0eb1f7913d5546af4469c469752efd
SHA1 a4f54029975a7ccb6a602d17eed1311cb961cc8f
SHA512 e9d3dd036b6b157970b246575d569ea33c2747db5f8a38ddfab97efcacf558ab07554c0872de2b0b71f1ee93603df53d7b7f4ea73d908c7b03e8a93838852b18
MD5 SHA1 SHA512

Submit Download

Nodejs.vbs

Path C:\ProgramData\e594\Nodejs.vbs
Size 118B
SHA256 cce0046c1d3866aeecfb04c732275d3f30323d72710f39261beeeea25de15240
MD5 f64776fd74e2ad9e3e57bf1b7f463aa5
SHA1 d915b4d8c82dc18bd9849be3c8189537a5e2ae3b
SHA512 d0af6f53a9fc9f2e6f1a8430c316841081a47318b863bf9ba0e068c5f6b97f70de999c99dd732ba6cc5ea794a2e4c6894503696c46aa3498d5133a47986d858c
MD5 SHA1 SHA512

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py.ps1

Path C:\ProgramData\e594\py.ps1
Size 219KB
SHA256 85fe309bab896f7b74315b10487d9d93ed93429424ab1b9aced46e2223891e0f
MD5 9a84bd9d5ab99bb6b14f536f041de692
SHA1 37155e12b964e0abeebe76948f5c7bc6ff11e2b8
SHA512 0d965c2c453b59466d9d22c22c9c6225f5c395b508a4e57df3eefd66d27fea0af636e857281a444c54bee82a69d15a5bc5c725247fd25c63a84fb7266f4c9d5c
SSDEEP 1536:ReMD10HxuHY05UIy4rpmLoKZqcxU7SHzqQHw7rRim3ve0pAGFBQDVWQIy9qzRZoy:Uk0t0iInKWQIySpfQNnDYjb31543Apn
MD5 SHA1 SHA512 SSDEEP

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powershell.exe.log

Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log
Size 3KB
SHA256 1022ec2fed08ff473817fc53893e192a8e33e6a16f3d2c8cb6fd37f49c938e1e
MD5 223bd4ae02766ddc32e6145fd1a29301
SHA1 900cfd6526d7e33fb4039a1cc2790ea049bc2c5b
SHA512 648cd3f8a89a18128d2b1bf960835e087a74cdbc783dbfcc712b3cb9e3a2e4f715e534ba2ef81d89af8f60d4882f6859373248c875ceb26ad0922e891f2e74cc
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 1KB
SHA256 ef8cd66cc241c6d899919ae6f8369334b20202bd4ad49acfa546d29300c533d2
MD5 27fdb1beb89b56345e585d480be3026b
SHA1 2626e41ca27668518d01c04e1579f77027ff31a1
SHA512 bd8208c8763ad8a6c25b6363b8e0e2a3c694e4e0cabfe4ce5d40945bd1f4274b7da976997f825e95c4455bf6b2e20b5bd960609b172f7c70d3521cb2ab24d49a
MD5 SHA1 SHA512

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__PSScriptPolicyTest_l15cmh23.a20.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_l15cmh23.a20.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
MD5 SHA1 SHA512

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memory/844-169-0x000001FD9D940000-0x000001FD9D950000-memory.dmp

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memory/844-166-0x000001FD9D940000-0x000001FD9D950000-memory.dmp

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memory/844-168-0x000001FD9D940000-0x000001FD9D950000-memory.dmp

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memory/2600-145-0x000002CD22110000-0x000002CD22120000-memory.dmp

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memory/2600-144-0x000002CD22110000-0x000002CD22120000-memory.dmp

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memory/2600-143-0x000002CD22110000-0x000002CD22120000-memory.dmp

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memory/2600-138-0x000002CD22CA0000-0x000002CD22CC2000-memory.dmp

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memory/4356-170-0x0000000000400000-0x0000000000416000-memory.dmp

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memory/4356-172-0x0000000005570000-0x0000000005580000-memory.dmp

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memory/4356-173-0x0000000005960000-0x00000000059FC000-memory.dmp

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memory/4356-174-0x0000000005FB0000-0x0000000006554000-memory.dmp

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memory/4356-175-0x0000000005A00000-0x0000000005A66000-memory.dmp

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memory/4356-176-0x0000000005570000-0x0000000005580000-memory.dmp

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