asyncrat | 325076c547bffb21683f5bc023739016ad025c0739a7e122aa7289fa91fc88c2

General

Target

document_viewer.exe
Size

580KB
MD5

bc1722ec205a1c5ed34b8766971fe608
SHA1

43ded76bf48088b7684879214ad4d66b58ef9a90
SHA256

325076c547bffb21683f5bc023739016ad025c0739a7e122aa7289fa91fc88c2
SHA512

9eee2a624c14281de538b34032457c53276c3dad67b89989e7f95a3e93dae05e87bda13791aa00d8928d4a9845879d164ff900084ad5a120db44e934b0f89465
SSDEEP

12288:bIqDSu4Dsv9thG2SEzak3cgH+/nSsYCrDl0wnhkDsv9t:MqDSu8gLY/nWiuY

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Version

Venom RAT + HVNC + Stealer + Grabber v6.0.0

Botnet

Default

C2

179.43.142.197:5789

Mutex

ncarwpqkcbklyda

Attributes

delay
1
install
false
install_folder
%AppData%

aes.plain

Signatures

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

Async RAT payload 1 IoCs

rat

Processes:

resource	yara_rule
behavioral2/memory/4664-147-0x0000000000400000-0x0000000000416000-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

Processes:

document_viewer.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\Control Panel\International\Geo\Nation	document_viewer.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

document_viewer.exe

description pid process target process

PID 980 set thread context of 4664 980 document_viewer.exe document_viewer.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

4568 schtasks.exe

description	pid	process	target process
PID 980 set thread context of 4664	980	document_viewer.exe	document_viewer.exe

pid	process
4568	schtasks.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

Processes:

document_viewer.exepowershell.exepowershell.exedocument_viewer.exe

pid	process
980	document_viewer.exe
3384	powershell.exe
628	powershell.exe
980	document_viewer.exe
3384	powershell.exe
628	powershell.exe
4664	document_viewer.exe
4664	document_viewer.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes:

document_viewer.exepowershell.exepowershell.exedocument_viewer.exe

description	pid	process
Token: SeDebugPrivilege	980	document_viewer.exe
Token: SeDebugPrivilege	628	powershell.exe
Token: SeDebugPrivilege	3384	powershell.exe
Token: SeDebugPrivilege	4664	document_viewer.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

document_viewer.exe

pid process

4664 document_viewer.exe

pid	process
4664	document_viewer.exe

Suspicious use of WriteProcessMemory 17 IoCs

Processes:

document_viewer.exe

description	pid	process	target process
PID 980 wrote to memory of 628	980	document_viewer.exe	powershell.exe
PID 980 wrote to memory of 628	980	document_viewer.exe	powershell.exe
PID 980 wrote to memory of 628	980	document_viewer.exe	powershell.exe
PID 980 wrote to memory of 3384	980	document_viewer.exe	powershell.exe
PID 980 wrote to memory of 3384	980	document_viewer.exe	powershell.exe
PID 980 wrote to memory of 3384	980	document_viewer.exe	powershell.exe
PID 980 wrote to memory of 4568	980	document_viewer.exe	schtasks.exe
PID 980 wrote to memory of 4568	980	document_viewer.exe	schtasks.exe
PID 980 wrote to memory of 4568	980	document_viewer.exe	schtasks.exe
PID 980 wrote to memory of 4664	980	document_viewer.exe	document_viewer.exe
PID 980 wrote to memory of 4664	980	document_viewer.exe	document_viewer.exe
PID 980 wrote to memory of 4664	980	document_viewer.exe	document_viewer.exe
PID 980 wrote to memory of 4664	980	document_viewer.exe	document_viewer.exe
PID 980 wrote to memory of 4664	980	document_viewer.exe	document_viewer.exe
PID 980 wrote to memory of 4664	980	document_viewer.exe	document_viewer.exe
PID 980 wrote to memory of 4664	980	document_viewer.exe	document_viewer.exe
PID 980 wrote to memory of 4664	980	document_viewer.exe	document_viewer.exe

C:\Users\Admin\AppData\Local\Temp\document_viewer.exe
"C:\Users\Admin\AppData\Local\Temp\document_viewer.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:980

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\document_viewer.exe"
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:628

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\sDCoBOTNA.exe"
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:3384

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\sDCoBOTNA" /XML "C:\Users\Admin\AppData\Local\Temp\tmp3038.tmp"
2⤵
- Creates scheduled task(s)
PID:4568

C:\Users\Admin\AppData\Local\Temp\document_viewer.exe
"C:\Users\Admin\AppData\Local\Temp\document_viewer.exe"
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
PID:4664

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

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\powershell.exe.log
Filesize
2KB

MD5
968cb9309758126772781b83adb8a28f

SHA1
8da30e71accf186b2ba11da1797cf67f8f78b47c

SHA256
92099c10776bb7e3f2a8d1b82d4d40d0c4627e4f1bf754a6e58dfd2c2e97042a

SHA512
4bd50732f8af4d688d95999bddfd296115d7033ddc38f86c9fb1f47fde202bffa27e9088bebcaa3064ca946af2f5c1ca6cbde49d0907f0005c7ab42874515dd3

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Filesize
18KB

MD5
451ef62cd72fd897630ab21b77b85224

SHA1
ed2499af5685d1105b5230b4c537726660435245

SHA256
4b60e388e0b847096de39e517304a3426685c2ef88f1a0a953d64d40b9ce8bd8

SHA512
c787e034a83e647a787ab5d0d95f12e0fb8a89017cd70101476e23c6e8f94c64642fe21743b572ccefd305c82314676f902f8ac32fa95f0244d6a35030e605c5

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp3038.tmp
Filesize
1KB

MD5
ddca58a1c15e3ff61f4203ee575903c4

SHA1
8372df54dd111a13f9751f154901c2c37c4c6e30

SHA256
df9fe61f57c42627e908b644ff23162834c87619f793d9be16ebf27f2d4c598c

SHA512
4bbea187ab30caa7ab1eb96973a68c9638470e1e1c11442711189c12d161ae83ae8ccbe2cfe0d5a6cff9a5c3723e5e8a13dbf995d7e299258aea124d0f2bd07b

Download Submit
memory/628-156-0x0000000007660000-0x00000000076F6000-memory.dmp

Filesize
600KB

Download
memory/628-145-0x0000000005950000-0x00000000059B6000-memory.dmp

Filesize
408KB

Download
memory/628-150-0x0000000075830000-0x000000007587C000-memory.dmp

Filesize
304KB

Download
memory/628-153-0x0000000007A30000-0x00000000080AA000-memory.dmp

Filesize
6.5MB

Download
memory/628-137-0x0000000000000000-mapping.dmp

Download
memory/628-140-0x0000000002810000-0x0000000002846000-memory.dmp

Filesize
216KB

Download
memory/628-141-0x0000000005320000-0x0000000005948000-memory.dmp

Filesize
6.2MB

Download
memory/628-155-0x0000000007460000-0x000000000746A000-memory.dmp

Filesize
40KB

Download
memory/628-144-0x00000000052A0000-0x0000000005306000-memory.dmp

Filesize
408KB

Download
memory/980-134-0x00000000057E0000-0x0000000005872000-memory.dmp

Filesize
584KB

Download
memory/980-136-0x00000000084E0000-0x000000000857C000-memory.dmp

Filesize
624KB

Download
memory/980-132-0x0000000000DA0000-0x0000000000E38000-memory.dmp

Filesize
608KB

Download
memory/980-135-0x00000000058A0000-0x00000000058AA000-memory.dmp

Filesize
40KB

Download
memory/980-133-0x0000000005E70000-0x0000000006414000-memory.dmp

Filesize
5.6MB

Download
memory/3384-157-0x0000000007C00000-0x0000000007C0E000-memory.dmp

Filesize
56KB

Download
memory/3384-151-0x0000000075830000-0x000000007587C000-memory.dmp

Filesize
304KB

Download
memory/3384-138-0x0000000000000000-mapping.dmp

Download
memory/3384-152-0x0000000006C90000-0x0000000006CAE000-memory.dmp

Filesize
120KB

Download
memory/3384-148-0x00000000066D0000-0x00000000066EE000-memory.dmp

Filesize
120KB

Download
memory/3384-154-0x00000000079D0000-0x00000000079EA000-memory.dmp

Filesize
104KB

Download
memory/3384-149-0x0000000006CD0000-0x0000000006D02000-memory.dmp

Filesize
200KB

Download
memory/3384-159-0x0000000007CF0000-0x0000000007CF8000-memory.dmp

Filesize
32KB

Download
memory/3384-143-0x0000000005F50000-0x0000000005F72000-memory.dmp

Filesize
136KB

Download
memory/3384-158-0x0000000007D10000-0x0000000007D2A000-memory.dmp

Filesize
104KB

Download
memory/4568-139-0x0000000000000000-mapping.dmp

Download
memory/4664-147-0x0000000000400000-0x0000000000416000-memory.dmp

Filesize
88KB

Download
memory/4664-146-0x0000000000000000-mapping.dmp

Download
memory/4664-162-0x0000000006D20000-0x0000000006D96000-memory.dmp

Filesize
472KB

Download
memory/4664-163-0x0000000006CF0000-0x0000000006D0E000-memory.dmp

Filesize
120KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads