asyncrat | 6815ff5dc021df4556f774108073648ca9191f7634c9fca94707d54ef686ee38

General

Target

6815ff5dc021df4556f774108073648ca9191f7634c9fca94707d54ef686ee38.exe
Size

195KB
MD5

66a167b944c4ea45a207f551e2c9fc28
SHA1

88703c2bf165899ec004dab9f5f273c46a8d286c
SHA256

6815ff5dc021df4556f774108073648ca9191f7634c9fca94707d54ef686ee38
SHA512

89d647f0593518fa63976e168588c41bacd91bd6be59550e535a27ca7d817f29705830ce5ad3810a76096934d66216afb3f4f670309c102f1f4c496027969370
SSDEEP

1536:hu0Fi41HYlZuIyPGSRfxp6kghBtdhv/oOK5XjJwkA1MmnQTNSbgjxAAnieghr4Dq:huTnaYfshPPD74Jo50093FFd7GEawuJ

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

C2

ValentinMihai-48225.portmap.io:48225=>7119:48225

ValentinMihai-48225.portmap.io:48225=>7119:7119

Mutex

AsyncMutex_6SI8OkPnk

Attributes

delay
3
install
true
install_file
Windows Defender SmartScreen.exe
install_folder
%AppData%

aes.plain

Signatures

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

Async RAT payload 5 IoCs

rat

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Roaming\build.exe	asyncrat
C:\Users\Admin\AppData\Roaming\build.exe	asyncrat
behavioral2/memory/3208-138-0x0000000000720000-0x0000000000732000-memory.dmp	asyncrat
C:\Users\Admin\AppData\Roaming\Windows Defender SmartScreen.exe	asyncrat
C:\Users\Admin\AppData\Roaming\Windows Defender SmartScreen.exe	asyncrat

Executes dropped EXE 2 IoCs

Processes:

build.exeWindows Defender SmartScreen.exe

pid process

3208 build.exe
5028 Windows Defender SmartScreen.exe

Checks computer location settings 2 TTPs 2 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

Processes:

6815ff5dc021df4556f774108073648ca9191f7634c9fca94707d54ef686ee38.exebuild.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation	6815ff5dc021df4556f774108073648ca9191f7634c9fca94707d54ef686ee38.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation	build.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

4376 schtasks.exe
Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

4880 timeout.exe

pid	process
4376	schtasks.exe

pid	process
4880	timeout.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

Processes:

build.exe

pid	process
3208	build.exe
3208	build.exe
3208	build.exe
3208	build.exe
3208	build.exe
3208	build.exe
3208	build.exe
3208	build.exe
3208	build.exe
3208	build.exe
3208	build.exe
3208	build.exe
3208	build.exe
3208	build.exe
3208	build.exe
3208	build.exe
3208	build.exe
3208	build.exe
3208	build.exe
3208	build.exe
3208	build.exe
3208	build.exe
3208	build.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

build.exeWindows Defender SmartScreen.exe

description pid process

Token: SeDebugPrivilege 3208 build.exe
Token: SeDebugPrivilege 5028 Windows Defender SmartScreen.exe

description	pid	process
Token: SeDebugPrivilege	3208	build.exe
Token: SeDebugPrivilege	5028	Windows Defender SmartScreen.exe

Suspicious use of WriteProcessMemory 18 IoCs

Processes:

6815ff5dc021df4556f774108073648ca9191f7634c9fca94707d54ef686ee38.exebuild.execmd.execmd.exe

description	pid	process	target process
PID 384 wrote to memory of 3208	384	6815ff5dc021df4556f774108073648ca9191f7634c9fca94707d54ef686ee38.exe	build.exe
PID 384 wrote to memory of 3208	384	6815ff5dc021df4556f774108073648ca9191f7634c9fca94707d54ef686ee38.exe	build.exe
PID 384 wrote to memory of 3208	384	6815ff5dc021df4556f774108073648ca9191f7634c9fca94707d54ef686ee38.exe	build.exe
PID 3208 wrote to memory of 3856	3208	build.exe	cmd.exe
PID 3208 wrote to memory of 3856	3208	build.exe	cmd.exe
PID 3208 wrote to memory of 3856	3208	build.exe	cmd.exe
PID 3856 wrote to memory of 4376	3856	cmd.exe	schtasks.exe
PID 3856 wrote to memory of 4376	3856	cmd.exe	schtasks.exe
PID 3856 wrote to memory of 4376	3856	cmd.exe	schtasks.exe
PID 3208 wrote to memory of 4924	3208	build.exe	cmd.exe
PID 3208 wrote to memory of 4924	3208	build.exe	cmd.exe
PID 3208 wrote to memory of 4924	3208	build.exe	cmd.exe
PID 4924 wrote to memory of 4880	4924	cmd.exe	timeout.exe
PID 4924 wrote to memory of 4880	4924	cmd.exe	timeout.exe
PID 4924 wrote to memory of 4880	4924	cmd.exe	timeout.exe
PID 4924 wrote to memory of 5028	4924	cmd.exe	Windows Defender SmartScreen.exe
PID 4924 wrote to memory of 5028	4924	cmd.exe	Windows Defender SmartScreen.exe
PID 4924 wrote to memory of 5028	4924	cmd.exe	Windows Defender SmartScreen.exe

C:\Users\Admin\AppData\Local\Temp\6815ff5dc021df4556f774108073648ca9191f7634c9fca94707d54ef686ee38.exe
"C:\Users\Admin\AppData\Local\Temp\6815ff5dc021df4556f774108073648ca9191f7634c9fca94707d54ef686ee38.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:384

C:\Users\Admin\AppData\Roaming\build.exe
"C:\Users\Admin\AppData\Roaming\build.exe"
2⤵
- Executes dropped EXE
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3208

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "Windows Defender SmartScreen" /tr '"C:\Users\Admin\AppData\Roaming\Windows Defender SmartScreen.exe"' & exit
3⤵
- Suspicious use of WriteProcessMemory
PID:3856

C:\Windows\SysWOW64\schtasks.exe
schtasks /create /f /sc onlogon /rl highest /tn "Windows Defender SmartScreen" /tr '"C:\Users\Admin\AppData\Roaming\Windows Defender SmartScreen.exe"'
4⤵
- Creates scheduled task(s)
PID:4376

C:\Windows\SysWOW64\cmd.exe
C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpA609.tmp.bat""
3⤵
- Suspicious use of WriteProcessMemory
PID:4924

C:\Windows\SysWOW64\timeout.exe
timeout 3
4⤵
- Delays execution with timeout.exe
PID:4880

C:\Users\Admin\AppData\Roaming\Windows Defender SmartScreen.exe
"C:\Users\Admin\AppData\Roaming\Windows Defender SmartScreen.exe"
4⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:5028

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\Temp\tmpA609.tmp.bat
Filesize
172B

MD5
bd818ab02b7073fc8b18949a3ee8ee52

SHA1
fca449b9027391e2f2dc9a90e028768fae297415

SHA256
33e4ab0c5483529e5eeafee69512c78d867b284c2844fb245e89a9f5deb076d0

SHA512
3aaedfba87d62c89d4018df771036ecb697c765e97db2d65cb9b8e2986e916c68f472f3a9a6bc723837a97a0e0307f657c079903cf5420c22ad7eb9e2637f5c1

Download Submit
C:\Users\Admin\AppData\Roaming\Windows Defender SmartScreen.exe
Filesize
47KB

MD5
20f0a4c172d05e4c9409dfe2dd8f773f

SHA1
39af4d0c658263df11c6b9951fa5336b1bedd817

SHA256
2dcecfb77772e8dc0b56d6421aa0f782fabe4d1730f29880bfd3edfee98bdc5f

SHA512
406dcc9775a66db15e99ea9db277ccdbc15b6f86e09ce0e0ac45cdbb2218ee2440117430574c1aed5c42b28d47a8a997d27221b5e0c1021b722f826858fb43f8

Download Submit
C:\Users\Admin\AppData\Roaming\Windows Defender SmartScreen.exe
Filesize
47KB

MD5
20f0a4c172d05e4c9409dfe2dd8f773f

SHA1
39af4d0c658263df11c6b9951fa5336b1bedd817

SHA256
2dcecfb77772e8dc0b56d6421aa0f782fabe4d1730f29880bfd3edfee98bdc5f

SHA512
406dcc9775a66db15e99ea9db277ccdbc15b6f86e09ce0e0ac45cdbb2218ee2440117430574c1aed5c42b28d47a8a997d27221b5e0c1021b722f826858fb43f8

Download Submit
C:\Users\Admin\AppData\Roaming\build.exe
Filesize
47KB

MD5
20f0a4c172d05e4c9409dfe2dd8f773f

SHA1
39af4d0c658263df11c6b9951fa5336b1bedd817

SHA256
2dcecfb77772e8dc0b56d6421aa0f782fabe4d1730f29880bfd3edfee98bdc5f

SHA512
406dcc9775a66db15e99ea9db277ccdbc15b6f86e09ce0e0ac45cdbb2218ee2440117430574c1aed5c42b28d47a8a997d27221b5e0c1021b722f826858fb43f8

Download Submit
C:\Users\Admin\AppData\Roaming\build.exe
Filesize
47KB

MD5
20f0a4c172d05e4c9409dfe2dd8f773f

SHA1
39af4d0c658263df11c6b9951fa5336b1bedd817

SHA256
2dcecfb77772e8dc0b56d6421aa0f782fabe4d1730f29880bfd3edfee98bdc5f

SHA512
406dcc9775a66db15e99ea9db277ccdbc15b6f86e09ce0e0ac45cdbb2218ee2440117430574c1aed5c42b28d47a8a997d27221b5e0c1021b722f826858fb43f8

Download Submit
memory/384-133-0x00007FFC18140000-0x00007FFC18C01000-memory.dmp

Filesize
10.8MB

Download
memory/384-136-0x00007FFC18140000-0x00007FFC18C01000-memory.dmp

Filesize
10.8MB

Download
memory/384-132-0x0000000000A50000-0x0000000000A88000-memory.dmp

Filesize
224KB

Download
memory/3208-134-0x0000000000000000-mapping.dmp

Download
memory/3208-138-0x0000000000720000-0x0000000000732000-memory.dmp

Filesize
72KB

Download
memory/3208-139-0x00000000053E0000-0x000000000547C000-memory.dmp

Filesize
624KB

Download
memory/3856-140-0x0000000000000000-mapping.dmp

Download
memory/4376-141-0x0000000000000000-mapping.dmp

Download
memory/4880-144-0x0000000000000000-mapping.dmp

Download
memory/4924-142-0x0000000000000000-mapping.dmp

Download
memory/5028-145-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads