asyncrat | bcb3f5843cba83b163c793e06e5d583a021da1c5794fdd7e484e6ad0f9655e8f

General

Target

bcb3f5843cba83b163c793e06e5d583a021da1c5794fdd7e484e6ad0f9655e8f.exe
Size

624KB
MD5

041e966e088ae931009805da96e4997d
SHA1

09877b64628255c310a4dd310593a6c52b1db9dc
SHA256

bcb3f5843cba83b163c793e06e5d583a021da1c5794fdd7e484e6ad0f9655e8f
SHA512

c201f5b6c3a223e2064abcd7966edfd01f5df9f5e5d0c59a4d376141a86a60252e1c5cd6b1409d93dc6ee6ab886d271f5790ebae5d6721361f2f7a044dbf7290

Score

10^/10

asyncrat persistence rat

Malware Config

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers.
rat asyncrat

Async RAT payload 1 IoCs

rat

Processes:

resource	yara_rule
behavioral1/memory/1716-140-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat

Sets service image path in registry 2 TTPs
persistence

Registry Run Keys / Startup Folder
T1060

Modify Registry
T1112

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

Processes:

bcb3f5843cba83b163c793e06e5d583a021da1c5794fdd7e484e6ad0f9655e8f.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-790714498-1549421491-1643397139-1000\Control Panel\International\Geo\Nation	bcb3f5843cba83b163c793e06e5d583a021da1c5794fdd7e484e6ad0f9655e8f.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

bcb3f5843cba83b163c793e06e5d583a021da1c5794fdd7e484e6ad0f9655e8f.exe

description	pid	process	target process
PID 3992 set thread context of 1716	3992	bcb3f5843cba83b163c793e06e5d583a021da1c5794fdd7e484e6ad0f9655e8f.exe	bcb3f5843cba83b163c793e06e5d583a021da1c5794fdd7e484e6ad0f9655e8f.exe

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

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

Processes:

schtasks.exe

pid process

2548 schtasks.exe

pid	process
2548	schtasks.exe

Modifies data under HKEY_USERS 41 IoCs

Processes:

WaaSMedicAgent.exe

description	ioc	process
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\WinTrust\Trust Providers\Software Publishing	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA\Certificates	WaaSMedicAgent.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

bcb3f5843cba83b163c793e06e5d583a021da1c5794fdd7e484e6ad0f9655e8f.exepowershell.exe

pid	process
3992	bcb3f5843cba83b163c793e06e5d583a021da1c5794fdd7e484e6ad0f9655e8f.exe
3992	bcb3f5843cba83b163c793e06e5d583a021da1c5794fdd7e484e6ad0f9655e8f.exe
3544	powershell.exe
3544	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

bcb3f5843cba83b163c793e06e5d583a021da1c5794fdd7e484e6ad0f9655e8f.exepowershell.exebcb3f5843cba83b163c793e06e5d583a021da1c5794fdd7e484e6ad0f9655e8f.exe

description	pid	process
Token: SeDebugPrivilege	3992	bcb3f5843cba83b163c793e06e5d583a021da1c5794fdd7e484e6ad0f9655e8f.exe
Token: SeDebugPrivilege	3544	powershell.exe
Token: SeDebugPrivilege	1716	bcb3f5843cba83b163c793e06e5d583a021da1c5794fdd7e484e6ad0f9655e8f.exe

Suspicious use of WriteProcessMemory 17 IoCs

Processes:

bcb3f5843cba83b163c793e06e5d583a021da1c5794fdd7e484e6ad0f9655e8f.exe

C:\Users\Admin\AppData\Local\Temp\bcb3f5843cba83b163c793e06e5d583a021da1c5794fdd7e484e6ad0f9655e8f.exe
"C:\Users\Admin\AppData\Local\Temp\bcb3f5843cba83b163c793e06e5d583a021da1c5794fdd7e484e6ad0f9655e8f.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3992

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\btVAOWX.exe"
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:3544

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\btVAOWX" /XML "C:\Users\Admin\AppData\Local\Temp\tmp1CD7.tmp"
2⤵
- Creates scheduled task(s)
PID:2548

C:\Users\Admin\AppData\Local\Temp\bcb3f5843cba83b163c793e06e5d583a021da1c5794fdd7e484e6ad0f9655e8f.exe
"C:\Users\Admin\AppData\Local\Temp\bcb3f5843cba83b163c793e06e5d583a021da1c5794fdd7e484e6ad0f9655e8f.exe"
2⤵
PID:1164

C:\Users\Admin\AppData\Local\Temp\bcb3f5843cba83b163c793e06e5d583a021da1c5794fdd7e484e6ad0f9655e8f.exe
"C:\Users\Admin\AppData\Local\Temp\bcb3f5843cba83b163c793e06e5d583a021da1c5794fdd7e484e6ad0f9655e8f.exe"
2⤵
- Suspicious use of AdjustPrivilegeToken
PID:1716

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k LocalServiceAndNoImpersonation -p
1⤵
PID:3364

C:\Windows\System32\WaaSMedicAgent.exe
C:\Windows\System32\WaaSMedicAgent.exe fb7cb331b29f03b4f8b8e38abd0a2f0c pENXZnoQfkS8lHBIlpwrEQ.0.1.0.0.0
1⤵
- Modifies data under HKEY_USERS
PID:3084

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k wusvcs -p
1⤵
PID:2260

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Registry Run Keys / Startup Folder

1

T1060

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\bcb3f5843cba83b163c793e06e5d583a021da1c5794fdd7e484e6ad0f9655e8f.exe.log
MD5
8ec831f3e3a3f77e4a7b9cd32b48384c

SHA1
d83f09fd87c5bd86e045873c231c14836e76a05c

SHA256
7667e538030e3f8ce2886e47a01af24cb0ea70528b1e821c5d8832c5076cb982

SHA512
26bffa2406b66368bd412bf25869a792631455645992cdcade2dbc13a2e56fb546414a6a9223b94c96c38d89187add6678d4779a88b38b0c9e36be8527b213c3

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp1CD7.tmp
MD5
6a7b707ce24c5085dbb2328f00804285

SHA1
494ed4ee96b624ea39ee0ce0961bf9c2a1013189

SHA256
3b05a508796c5ab78374636b95d085c9b1ed59b7d085b3c33fb336fdd54f125f

SHA512
e33471cafb87d0052542136f6ba82767ae2ebeea8aea77f0dfe04e36ae03be2a39ee186f7ad024b2768d13a7392b21aad51100b521ed8fd66f792d7d5e63de6c

Download Submit
memory/1716-148-0x0000000001980000-0x0000000001981000-memory.dmp

Filesize
4KB

Download
memory/1716-140-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/3544-146-0x0000000007420000-0x0000000007486000-memory.dmp

Filesize
408KB

Download
memory/3544-149-0x00000000071E0000-0x00000000071FE000-memory.dmp

Filesize
120KB

Download
memory/3544-161-0x00000000099E0000-0x00000000099E8000-memory.dmp

Filesize
32KB

Download
memory/3544-139-0x0000000006E90000-0x0000000006EC6000-memory.dmp

Filesize
216KB

Download
memory/3544-160-0x0000000009A90000-0x0000000009AAA000-memory.dmp

Filesize
104KB

Download
memory/3544-159-0x0000000009990000-0x000000000999E000-memory.dmp

Filesize
56KB

Download
memory/3544-142-0x0000000006E30000-0x0000000006E40000-memory.dmp

Filesize
64KB

Download
memory/3544-143-0x0000000006E30000-0x0000000006E40000-memory.dmp

Filesize
64KB

Download
memory/3544-144-0x0000000007500000-0x0000000007B28000-memory.dmp

Filesize
6.2MB

Download
memory/3544-145-0x0000000007380000-0x00000000073A2000-memory.dmp

Filesize
136KB

Download
memory/3544-158-0x00000000099F0000-0x0000000009A86000-memory.dmp

Filesize
600KB

Download
memory/3544-147-0x0000000007490000-0x00000000074F6000-memory.dmp

Filesize
408KB

Download
memory/3544-157-0x00000000097C0000-0x00000000097CA000-memory.dmp

Filesize
40KB

Download
memory/3544-156-0x0000000009750000-0x000000000976A000-memory.dmp

Filesize
104KB

Download
memory/3544-150-0x0000000006E30000-0x0000000006E40000-memory.dmp

Filesize
64KB

Download
memory/3544-151-0x0000000008A30000-0x0000000008A62000-memory.dmp

Filesize
200KB

Download
memory/3544-152-0x0000000071930000-0x000000007197C000-memory.dmp

Filesize
304KB

Download
memory/3544-153-0x00000000089F0000-0x0000000008A0E000-memory.dmp

Filesize
120KB

Download
memory/3544-154-0x000000007F2A0000-0x000000007F2A1000-memory.dmp

Filesize
4KB

Download
memory/3544-155-0x0000000009DA0000-0x000000000A41A000-memory.dmp

Filesize
6.5MB

Download
memory/3992-135-0x0000000007B60000-0x0000000007BFC000-memory.dmp

Filesize
624KB

Download
memory/3992-131-0x0000000005B20000-0x00000000060C4000-memory.dmp

Filesize
5.6MB

Download
memory/3992-130-0x0000000000B00000-0x0000000000BA2000-memory.dmp

Filesize
648KB

Download
memory/3992-132-0x0000000005610000-0x00000000056A2000-memory.dmp

Filesize
584KB

Download
memory/3992-133-0x0000000005570000-0x0000000005B14000-memory.dmp

Filesize
5.6MB

Download
memory/3992-134-0x0000000005580000-0x000000000558A000-memory.dmp

Filesize
40KB

Download

description	pid	process	target process
PID 3992 wrote to memory of 3544	3992	bcb3f5843cba83b163c793e06e5d583a021da1c5794fdd7e484e6ad0f9655e8f.exe	powershell.exe
PID 3992 wrote to memory of 3544	3992	bcb3f5843cba83b163c793e06e5d583a021da1c5794fdd7e484e6ad0f9655e8f.exe	powershell.exe
PID 3992 wrote to memory of 3544	3992	bcb3f5843cba83b163c793e06e5d583a021da1c5794fdd7e484e6ad0f9655e8f.exe	powershell.exe
PID 3992 wrote to memory of 2548	3992	bcb3f5843cba83b163c793e06e5d583a021da1c5794fdd7e484e6ad0f9655e8f.exe	schtasks.exe
PID 3992 wrote to memory of 2548	3992	bcb3f5843cba83b163c793e06e5d583a021da1c5794fdd7e484e6ad0f9655e8f.exe	schtasks.exe
PID 3992 wrote to memory of 2548	3992	bcb3f5843cba83b163c793e06e5d583a021da1c5794fdd7e484e6ad0f9655e8f.exe	schtasks.exe
PID 3992 wrote to memory of 1164	3992	bcb3f5843cba83b163c793e06e5d583a021da1c5794fdd7e484e6ad0f9655e8f.exe	bcb3f5843cba83b163c793e06e5d583a021da1c5794fdd7e484e6ad0f9655e8f.exe
PID 3992 wrote to memory of 1164	3992	bcb3f5843cba83b163c793e06e5d583a021da1c5794fdd7e484e6ad0f9655e8f.exe	bcb3f5843cba83b163c793e06e5d583a021da1c5794fdd7e484e6ad0f9655e8f.exe
PID 3992 wrote to memory of 1164	3992	bcb3f5843cba83b163c793e06e5d583a021da1c5794fdd7e484e6ad0f9655e8f.exe	bcb3f5843cba83b163c793e06e5d583a021da1c5794fdd7e484e6ad0f9655e8f.exe
PID 3992 wrote to memory of 1716	3992	bcb3f5843cba83b163c793e06e5d583a021da1c5794fdd7e484e6ad0f9655e8f.exe	bcb3f5843cba83b163c793e06e5d583a021da1c5794fdd7e484e6ad0f9655e8f.exe
PID 3992 wrote to memory of 1716	3992	bcb3f5843cba83b163c793e06e5d583a021da1c5794fdd7e484e6ad0f9655e8f.exe	bcb3f5843cba83b163c793e06e5d583a021da1c5794fdd7e484e6ad0f9655e8f.exe
PID 3992 wrote to memory of 1716	3992	bcb3f5843cba83b163c793e06e5d583a021da1c5794fdd7e484e6ad0f9655e8f.exe	bcb3f5843cba83b163c793e06e5d583a021da1c5794fdd7e484e6ad0f9655e8f.exe
PID 3992 wrote to memory of 1716	3992	bcb3f5843cba83b163c793e06e5d583a021da1c5794fdd7e484e6ad0f9655e8f.exe	bcb3f5843cba83b163c793e06e5d583a021da1c5794fdd7e484e6ad0f9655e8f.exe
PID 3992 wrote to memory of 1716	3992	bcb3f5843cba83b163c793e06e5d583a021da1c5794fdd7e484e6ad0f9655e8f.exe	bcb3f5843cba83b163c793e06e5d583a021da1c5794fdd7e484e6ad0f9655e8f.exe
PID 3992 wrote to memory of 1716	3992	bcb3f5843cba83b163c793e06e5d583a021da1c5794fdd7e484e6ad0f9655e8f.exe	bcb3f5843cba83b163c793e06e5d583a021da1c5794fdd7e484e6ad0f9655e8f.exe
PID 3992 wrote to memory of 1716	3992	bcb3f5843cba83b163c793e06e5d583a021da1c5794fdd7e484e6ad0f9655e8f.exe	bcb3f5843cba83b163c793e06e5d583a021da1c5794fdd7e484e6ad0f9655e8f.exe
PID 3992 wrote to memory of 1716	3992	bcb3f5843cba83b163c793e06e5d583a021da1c5794fdd7e484e6ad0f9655e8f.exe	bcb3f5843cba83b163c793e06e5d583a021da1c5794fdd7e484e6ad0f9655e8f.exe

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

Replay Monitor

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Downloads