asyncrat | 2bbea59df3d821b3be653542b95a261bec805a7dacbdd117beaef7b3c8586a7e

Analysis

max time kernel
148s
max time network
160s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
19-08-2022 03:50

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General

Target

2bbea59df3d821b3be653542b95a261bec805a7dacbdd117beaef7b3c8586a7e.exe
Size

2.2MB
MD5

b5f1a37cbd6c8a4690942fd254270ce1
SHA1

e31e9c0d978a340445572bbb4b07fd2d5f9cb6ec
SHA256

2bbea59df3d821b3be653542b95a261bec805a7dacbdd117beaef7b3c8586a7e
SHA512

6a7a39a9511d3bbe42a90d0a8c6a7e97d6427b8d68fc303b1b6dc2c3737ba7c875ccf44683ca792aab92daba43ffea32da93066acb64005f2e7532ce011b6996

Score

10^/10

asyncrat default persistence rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

76.8.53.133:62520

Mutex

AsyncMutex_6SI8OkPnk

Attributes

delay
3
install
true
install_file
dwwm.exe
install_folder
%AppData%

aes.plain

Signatures

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

Async RAT payload 8 IoCs

rat

Processes:

resource	yara_rule
\Users\Admin\AppData\Local\Temp\Kxtwaidanpqpiuhprlehfsshclientip.exe	asyncrat
C:\Users\Admin\AppData\Local\Temp\Kxtwaidanpqpiuhprlehfsshclientip.exe	asyncrat
C:\Users\Admin\AppData\Local\Temp\Kxtwaidanpqpiuhprlehfsshclientip.exe	asyncrat
behavioral1/memory/1932-67-0x0000000000300000-0x0000000000312000-memory.dmp	asyncrat
\Users\Admin\AppData\Roaming\dwwm.exe	asyncrat
C:\Users\Admin\AppData\Roaming\dwwm.exe	asyncrat
C:\Users\Admin\AppData\Roaming\dwwm.exe	asyncrat
behavioral1/memory/1988-89-0x0000000000D40000-0x0000000000D52000-memory.dmp	asyncrat

Executes dropped EXE 2 IoCs

Processes:

Kxtwaidanpqpiuhprlehfsshclientip.exedwwm.exe

pid process

1932 Kxtwaidanpqpiuhprlehfsshclientip.exe
1988 dwwm.exe
Loads dropped DLL 2 IoCs

Processes:

2bbea59df3d821b3be653542b95a261bec805a7dacbdd117beaef7b3c8586a7e.execmd.exe

pid process

364 2bbea59df3d821b3be653542b95a261bec805a7dacbdd117beaef7b3c8586a7e.exe
1212 cmd.exe

pid	process
1932	Kxtwaidanpqpiuhprlehfsshclientip.exe
1988	dwwm.exe

pid	process
364	2bbea59df3d821b3be653542b95a261bec805a7dacbdd117beaef7b3c8586a7e.exe
1212	cmd.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

2bbea59df3d821b3be653542b95a261bec805a7dacbdd117beaef7b3c8586a7e.exeInstallUtil.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-999675638-2867687379-27515722-1000\Software\Microsoft\Windows\CurrentVersion\Run\Keahz = "\"C:\\Users\\Admin\\AppData\\Roaming\\Tbsztbbv\\Keahz.exe\""	2bbea59df3d821b3be653542b95a261bec805a7dacbdd117beaef7b3c8586a7e.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-999675638-2867687379-27515722-1000\Software\Microsoft\Windows\CurrentVersion\Run\DBqQu = "C:\\Users\\Admin\\AppData\\Roaming\\DBqQu\\DBqQu.exe"	InstallUtil.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

2bbea59df3d821b3be653542b95a261bec805a7dacbdd117beaef7b3c8586a7e.exe

description	pid	process	target process
PID 364 set thread context of 1776	364	2bbea59df3d821b3be653542b95a261bec805a7dacbdd117beaef7b3c8586a7e.exe	InstallUtil.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

1732 schtasks.exe
Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

1980 timeout.exe

pid	process
1732	schtasks.exe

pid	process
1980	timeout.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

Processes:

powershell.exe2bbea59df3d821b3be653542b95a261bec805a7dacbdd117beaef7b3c8586a7e.exeInstallUtil.exeKxtwaidanpqpiuhprlehfsshclientip.exe

pid	process
912	powershell.exe
364	2bbea59df3d821b3be653542b95a261bec805a7dacbdd117beaef7b3c8586a7e.exe
1776	InstallUtil.exe
1776	InstallUtil.exe
1932	Kxtwaidanpqpiuhprlehfsshclientip.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

Processes:

2bbea59df3d821b3be653542b95a261bec805a7dacbdd117beaef7b3c8586a7e.exepowershell.exeInstallUtil.exeKxtwaidanpqpiuhprlehfsshclientip.exedwwm.exe

description	pid	process
Token: SeDebugPrivilege	364	2bbea59df3d821b3be653542b95a261bec805a7dacbdd117beaef7b3c8586a7e.exe
Token: SeDebugPrivilege	912	powershell.exe
Token: SeDebugPrivilege	1776	InstallUtil.exe
Token: SeDebugPrivilege	1932	Kxtwaidanpqpiuhprlehfsshclientip.exe
Token: SeDebugPrivilege	1988	dwwm.exe

Suspicious use of WriteProcessMemory 40 IoCs

Processes:

2bbea59df3d821b3be653542b95a261bec805a7dacbdd117beaef7b3c8586a7e.exeKxtwaidanpqpiuhprlehfsshclientip.execmd.execmd.exe

description	pid	process	target process
PID 364 wrote to memory of 912	364	2bbea59df3d821b3be653542b95a261bec805a7dacbdd117beaef7b3c8586a7e.exe	powershell.exe
PID 364 wrote to memory of 912	364	2bbea59df3d821b3be653542b95a261bec805a7dacbdd117beaef7b3c8586a7e.exe	powershell.exe
PID 364 wrote to memory of 912	364	2bbea59df3d821b3be653542b95a261bec805a7dacbdd117beaef7b3c8586a7e.exe	powershell.exe
PID 364 wrote to memory of 912	364	2bbea59df3d821b3be653542b95a261bec805a7dacbdd117beaef7b3c8586a7e.exe	powershell.exe
PID 364 wrote to memory of 1932	364	2bbea59df3d821b3be653542b95a261bec805a7dacbdd117beaef7b3c8586a7e.exe	Kxtwaidanpqpiuhprlehfsshclientip.exe
PID 364 wrote to memory of 1932	364	2bbea59df3d821b3be653542b95a261bec805a7dacbdd117beaef7b3c8586a7e.exe	Kxtwaidanpqpiuhprlehfsshclientip.exe
PID 364 wrote to memory of 1932	364	2bbea59df3d821b3be653542b95a261bec805a7dacbdd117beaef7b3c8586a7e.exe	Kxtwaidanpqpiuhprlehfsshclientip.exe
PID 364 wrote to memory of 1932	364	2bbea59df3d821b3be653542b95a261bec805a7dacbdd117beaef7b3c8586a7e.exe	Kxtwaidanpqpiuhprlehfsshclientip.exe
PID 364 wrote to memory of 1776	364	2bbea59df3d821b3be653542b95a261bec805a7dacbdd117beaef7b3c8586a7e.exe	InstallUtil.exe
PID 364 wrote to memory of 1776	364	2bbea59df3d821b3be653542b95a261bec805a7dacbdd117beaef7b3c8586a7e.exe	InstallUtil.exe
PID 364 wrote to memory of 1776	364	2bbea59df3d821b3be653542b95a261bec805a7dacbdd117beaef7b3c8586a7e.exe	InstallUtil.exe
PID 364 wrote to memory of 1776	364	2bbea59df3d821b3be653542b95a261bec805a7dacbdd117beaef7b3c8586a7e.exe	InstallUtil.exe
PID 364 wrote to memory of 1776	364	2bbea59df3d821b3be653542b95a261bec805a7dacbdd117beaef7b3c8586a7e.exe	InstallUtil.exe
PID 364 wrote to memory of 1776	364	2bbea59df3d821b3be653542b95a261bec805a7dacbdd117beaef7b3c8586a7e.exe	InstallUtil.exe
PID 364 wrote to memory of 1776	364	2bbea59df3d821b3be653542b95a261bec805a7dacbdd117beaef7b3c8586a7e.exe	InstallUtil.exe
PID 364 wrote to memory of 1776	364	2bbea59df3d821b3be653542b95a261bec805a7dacbdd117beaef7b3c8586a7e.exe	InstallUtil.exe
PID 364 wrote to memory of 1776	364	2bbea59df3d821b3be653542b95a261bec805a7dacbdd117beaef7b3c8586a7e.exe	InstallUtil.exe
PID 364 wrote to memory of 1776	364	2bbea59df3d821b3be653542b95a261bec805a7dacbdd117beaef7b3c8586a7e.exe	InstallUtil.exe
PID 364 wrote to memory of 1776	364	2bbea59df3d821b3be653542b95a261bec805a7dacbdd117beaef7b3c8586a7e.exe	InstallUtil.exe
PID 364 wrote to memory of 1776	364	2bbea59df3d821b3be653542b95a261bec805a7dacbdd117beaef7b3c8586a7e.exe	InstallUtil.exe
PID 1932 wrote to memory of 288	1932	Kxtwaidanpqpiuhprlehfsshclientip.exe	cmd.exe
PID 1932 wrote to memory of 288	1932	Kxtwaidanpqpiuhprlehfsshclientip.exe	cmd.exe
PID 1932 wrote to memory of 288	1932	Kxtwaidanpqpiuhprlehfsshclientip.exe	cmd.exe
PID 1932 wrote to memory of 288	1932	Kxtwaidanpqpiuhprlehfsshclientip.exe	cmd.exe
PID 1932 wrote to memory of 1212	1932	Kxtwaidanpqpiuhprlehfsshclientip.exe	cmd.exe
PID 1932 wrote to memory of 1212	1932	Kxtwaidanpqpiuhprlehfsshclientip.exe	cmd.exe
PID 1932 wrote to memory of 1212	1932	Kxtwaidanpqpiuhprlehfsshclientip.exe	cmd.exe
PID 1932 wrote to memory of 1212	1932	Kxtwaidanpqpiuhprlehfsshclientip.exe	cmd.exe
PID 288 wrote to memory of 1732	288	cmd.exe	schtasks.exe
PID 288 wrote to memory of 1732	288	cmd.exe	schtasks.exe
PID 288 wrote to memory of 1732	288	cmd.exe	schtasks.exe
PID 288 wrote to memory of 1732	288	cmd.exe	schtasks.exe
PID 1212 wrote to memory of 1980	1212	cmd.exe	timeout.exe
PID 1212 wrote to memory of 1980	1212	cmd.exe	timeout.exe
PID 1212 wrote to memory of 1980	1212	cmd.exe	timeout.exe
PID 1212 wrote to memory of 1980	1212	cmd.exe	timeout.exe
PID 1212 wrote to memory of 1988	1212	cmd.exe	dwwm.exe
PID 1212 wrote to memory of 1988	1212	cmd.exe	dwwm.exe
PID 1212 wrote to memory of 1988	1212	cmd.exe	dwwm.exe
PID 1212 wrote to memory of 1988	1212	cmd.exe	dwwm.exe

C:\Users\Admin\AppData\Local\Temp\2bbea59df3d821b3be653542b95a261bec805a7dacbdd117beaef7b3c8586a7e.exe
"C:\Users\Admin\AppData\Local\Temp\2bbea59df3d821b3be653542b95a261bec805a7dacbdd117beaef7b3c8586a7e.exe"
1⤵
- Loads dropped DLL
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:364

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -enc UwB0AGEAcgB0AC0AUwBsAGUAZQBwACAALQBTAGUAYwBvAG4AZABzACAAMQAwAA==
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:912

C:\Users\Admin\AppData\Local\Temp\Kxtwaidanpqpiuhprlehfsshclientip.exe
"C:\Users\Admin\AppData\Local\Temp\Kxtwaidanpqpiuhprlehfsshclientip.exe"
2⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1932

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "dwwm" /tr '"C:\Users\Admin\AppData\Roaming\dwwm.exe"' & exit
3⤵
- Suspicious use of WriteProcessMemory
PID:288

C:\Windows\SysWOW64\schtasks.exe
schtasks /create /f /sc onlogon /rl highest /tn "dwwm" /tr '"C:\Users\Admin\AppData\Roaming\dwwm.exe"'
4⤵
- Creates scheduled task(s)
PID:1732

C:\Windows\SysWOW64\cmd.exe
cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp3C37.tmp.bat""
3⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1212

C:\Windows\SysWOW64\timeout.exe
timeout 3
4⤵
- Delays execution with timeout.exe
PID:1980

C:\Users\Admin\AppData\Roaming\dwwm.exe
"C:\Users\Admin\AppData\Roaming\dwwm.exe"
4⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1988

C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
2⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1776

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Registry Run Keys / Startup Folder

T1060

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\Kxtwaidanpqpiuhprlehfsshclientip.exe
Filesize
45KB

MD5
09483dc605208384bf243df58a997193

SHA1
a0498cb4b34e5e0236304fc406c4e82e767ceb0e

SHA256
fcc37d35f86fb13150c8b3277382a76bfab0e22d7159f6addf86d302def260df

SHA512
767742ef725ae1e20556918a19c1d0607542b3a62a4ec5eb1859e20b6a5986185c4501c6f234500cad177330f6facb2ff351ea612c29d279c3c4d40fbf435b28

Download Submit
C:\Users\Admin\AppData\Local\Temp\Kxtwaidanpqpiuhprlehfsshclientip.exe
Filesize
45KB

MD5
09483dc605208384bf243df58a997193

SHA1
a0498cb4b34e5e0236304fc406c4e82e767ceb0e

SHA256
fcc37d35f86fb13150c8b3277382a76bfab0e22d7159f6addf86d302def260df

SHA512
767742ef725ae1e20556918a19c1d0607542b3a62a4ec5eb1859e20b6a5986185c4501c6f234500cad177330f6facb2ff351ea612c29d279c3c4d40fbf435b28

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp3C37.tmp.bat
Filesize
148B

MD5
f6b64a472b0d9d46003d61fd65d345b7

SHA1
a2214be1db6c49378fba5a98e88fa960ba1c7b4c

SHA256
fc2b468c027944e175a182e43675f155d6e9a6da2b2605c6e34b34069b920670

SHA512
c1ebea97fae33b3ce010cadc72384492558006f507d34edab3c88fdedf9f4c624095b3d183f77afafd1770bb7da9af63f18842213c89085b851b281b99bea8bf

Download Submit
C:\Users\Admin\AppData\Roaming\dwwm.exe
Filesize
45KB

MD5
09483dc605208384bf243df58a997193

SHA1
a0498cb4b34e5e0236304fc406c4e82e767ceb0e

SHA256
fcc37d35f86fb13150c8b3277382a76bfab0e22d7159f6addf86d302def260df

SHA512
767742ef725ae1e20556918a19c1d0607542b3a62a4ec5eb1859e20b6a5986185c4501c6f234500cad177330f6facb2ff351ea612c29d279c3c4d40fbf435b28

Download Submit
C:\Users\Admin\AppData\Roaming\dwwm.exe
Filesize
45KB

MD5
09483dc605208384bf243df58a997193

SHA1
a0498cb4b34e5e0236304fc406c4e82e767ceb0e

SHA256
fcc37d35f86fb13150c8b3277382a76bfab0e22d7159f6addf86d302def260df

SHA512
767742ef725ae1e20556918a19c1d0607542b3a62a4ec5eb1859e20b6a5986185c4501c6f234500cad177330f6facb2ff351ea612c29d279c3c4d40fbf435b28

Download Submit
\Users\Admin\AppData\Local\Temp\Kxtwaidanpqpiuhprlehfsshclientip.exe
Filesize
45KB

MD5
09483dc605208384bf243df58a997193

SHA1
a0498cb4b34e5e0236304fc406c4e82e767ceb0e

SHA256
fcc37d35f86fb13150c8b3277382a76bfab0e22d7159f6addf86d302def260df

SHA512
767742ef725ae1e20556918a19c1d0607542b3a62a4ec5eb1859e20b6a5986185c4501c6f234500cad177330f6facb2ff351ea612c29d279c3c4d40fbf435b28

Download Submit
\Users\Admin\AppData\Roaming\dwwm.exe
Filesize
45KB

MD5
09483dc605208384bf243df58a997193

SHA1
a0498cb4b34e5e0236304fc406c4e82e767ceb0e

SHA256
fcc37d35f86fb13150c8b3277382a76bfab0e22d7159f6addf86d302def260df

SHA512
767742ef725ae1e20556918a19c1d0607542b3a62a4ec5eb1859e20b6a5986185c4501c6f234500cad177330f6facb2ff351ea612c29d279c3c4d40fbf435b28

Download Submit
memory/288-80-0x0000000000000000-mapping.dmp

Download
memory/364-55-0x0000000004D00000-0x0000000004EE6000-memory.dmp

Filesize
1.9MB

Download
memory/364-56-0x0000000000720000-0x0000000000764000-memory.dmp

Filesize
272KB

Download
memory/364-57-0x0000000076681000-0x0000000076683000-memory.dmp

Filesize
8KB

Download
memory/364-54-0x00000000013E0000-0x0000000001614000-memory.dmp

Filesize
2.2MB

Download
memory/912-62-0x000000006F920000-0x000000006FECB000-memory.dmp

Filesize
5.7MB

Download
memory/912-60-0x000000006F920000-0x000000006FECB000-memory.dmp

Filesize
5.7MB

Download
memory/912-61-0x000000006F920000-0x000000006FECB000-memory.dmp

Filesize
5.7MB

Download
memory/912-58-0x0000000000000000-mapping.dmp

Download
memory/1212-81-0x0000000000000000-mapping.dmp

Download
memory/1732-83-0x0000000000000000-mapping.dmp

Download
memory/1776-72-0x0000000000400000-0x0000000000484000-memory.dmp

Filesize
528KB

Download
memory/1776-76-0x0000000000400000-0x0000000000484000-memory.dmp

Filesize
528KB

Download
memory/1776-78-0x0000000000400000-0x0000000000484000-memory.dmp

Filesize
528KB

Download
memory/1776-68-0x0000000000400000-0x0000000000484000-memory.dmp

Filesize
528KB

Download
memory/1776-73-0x0000000000400000-0x0000000000484000-memory.dmp

Filesize
528KB

Download
memory/1776-74-0x000000000047F6AE-mapping.dmp

Download
memory/1776-71-0x0000000000400000-0x0000000000484000-memory.dmp

Filesize
528KB

Download
memory/1776-69-0x0000000000400000-0x0000000000484000-memory.dmp

Filesize
528KB

Download
memory/1932-67-0x0000000000300000-0x0000000000312000-memory.dmp

Filesize
72KB

Download
memory/1932-64-0x0000000000000000-mapping.dmp

Download
memory/1980-84-0x0000000000000000-mapping.dmp

Download
memory/1988-87-0x0000000000000000-mapping.dmp

Download
memory/1988-89-0x0000000000D40000-0x0000000000D52000-memory.dmp

Filesize
72KB

Download