asyncrat | f5e715d046072f8716f662bb86a02be3f13dd984ed207562c9e8e3feb6aeab40

General

Target

F5E715D046072F8716F662BB86A02BE3F13DD984ED207.exe
Size

176KB
MD5

f8b8c7e30a0c98c7db0c64d4b925db75
SHA1

928ec1e03d21f51f34da1a7c801fdce9a36b3c36
SHA256

f5e715d046072f8716f662bb86a02be3f13dd984ed207562c9e8e3feb6aeab40
SHA512

67d7c8c62877a0d274089ef062a85e1b0622bcb6ccfc86d3bd9234973af514e211c4a3043504c597429ade35524f314efecea75a4695bf5489e282fef3cedef3
SSDEEP

3072:tuK0THf52BTHbvxPZYJ01yDgNlfWSZ0cXF:tuK+chHbIpgy/m

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

C2

zulakim.duckdns.org:6606

zulakim.duckdns.org:7707

zulakim.duckdns.org:8808

Mutex

AsyncMutex_6SI8OkPnk

Attributes

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

aes.plain

Signatures

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

Async RAT payload 3 IoCs

rat

Processes:

resource	yara_rule
behavioral2/memory/1044-132-0x0000000000180000-0x00000000001B2000-memory.dmp	asyncrat
C:\Users\Admin\AppData\Roaming\dllhost.exe	asyncrat
C:\Users\Admin\AppData\Roaming\dllhost.exe	asyncrat

Executes dropped EXE 1 IoCs

Processes:

dllhost.exe

pid process

4588 dllhost.exe

pid	process
4588	dllhost.exe

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:

F5E715D046072F8716F662BB86A02BE3F13DD984ED207.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\Control Panel\International\Geo\Nation	F5E715D046072F8716F662BB86A02BE3F13DD984ED207.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

4432 schtasks.exe
Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

3060 timeout.exe

pid	process
4432	schtasks.exe

pid	process
3060	timeout.exe

Suspicious behavior: EnumeratesProcesses 21 IoCs

Processes:

F5E715D046072F8716F662BB86A02BE3F13DD984ED207.exe

pid	process
1044	F5E715D046072F8716F662BB86A02BE3F13DD984ED207.exe
1044	F5E715D046072F8716F662BB86A02BE3F13DD984ED207.exe
1044	F5E715D046072F8716F662BB86A02BE3F13DD984ED207.exe
1044	F5E715D046072F8716F662BB86A02BE3F13DD984ED207.exe
1044	F5E715D046072F8716F662BB86A02BE3F13DD984ED207.exe
1044	F5E715D046072F8716F662BB86A02BE3F13DD984ED207.exe
1044	F5E715D046072F8716F662BB86A02BE3F13DD984ED207.exe
1044	F5E715D046072F8716F662BB86A02BE3F13DD984ED207.exe
1044	F5E715D046072F8716F662BB86A02BE3F13DD984ED207.exe
1044	F5E715D046072F8716F662BB86A02BE3F13DD984ED207.exe
1044	F5E715D046072F8716F662BB86A02BE3F13DD984ED207.exe
1044	F5E715D046072F8716F662BB86A02BE3F13DD984ED207.exe
1044	F5E715D046072F8716F662BB86A02BE3F13DD984ED207.exe
1044	F5E715D046072F8716F662BB86A02BE3F13DD984ED207.exe
1044	F5E715D046072F8716F662BB86A02BE3F13DD984ED207.exe
1044	F5E715D046072F8716F662BB86A02BE3F13DD984ED207.exe
1044	F5E715D046072F8716F662BB86A02BE3F13DD984ED207.exe
1044	F5E715D046072F8716F662BB86A02BE3F13DD984ED207.exe
1044	F5E715D046072F8716F662BB86A02BE3F13DD984ED207.exe
1044	F5E715D046072F8716F662BB86A02BE3F13DD984ED207.exe
1044	F5E715D046072F8716F662BB86A02BE3F13DD984ED207.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

F5E715D046072F8716F662BB86A02BE3F13DD984ED207.exedllhost.exe

description pid process

Token: SeDebugPrivilege 1044 F5E715D046072F8716F662BB86A02BE3F13DD984ED207.exe
Token: SeDebugPrivilege 4588 dllhost.exe

description	pid	process
Token: SeDebugPrivilege	1044	F5E715D046072F8716F662BB86A02BE3F13DD984ED207.exe
Token: SeDebugPrivilege	4588	dllhost.exe

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

F5E715D046072F8716F662BB86A02BE3F13DD984ED207.execmd.execmd.exe

description	pid	process	target process
PID 1044 wrote to memory of 3080	1044	F5E715D046072F8716F662BB86A02BE3F13DD984ED207.exe	cmd.exe
PID 1044 wrote to memory of 3080	1044	F5E715D046072F8716F662BB86A02BE3F13DD984ED207.exe	cmd.exe
PID 1044 wrote to memory of 3080	1044	F5E715D046072F8716F662BB86A02BE3F13DD984ED207.exe	cmd.exe
PID 1044 wrote to memory of 1940	1044	F5E715D046072F8716F662BB86A02BE3F13DD984ED207.exe	cmd.exe
PID 1044 wrote to memory of 1940	1044	F5E715D046072F8716F662BB86A02BE3F13DD984ED207.exe	cmd.exe
PID 1044 wrote to memory of 1940	1044	F5E715D046072F8716F662BB86A02BE3F13DD984ED207.exe	cmd.exe
PID 3080 wrote to memory of 4432	3080	cmd.exe	schtasks.exe
PID 3080 wrote to memory of 4432	3080	cmd.exe	schtasks.exe
PID 3080 wrote to memory of 4432	3080	cmd.exe	schtasks.exe
PID 1940 wrote to memory of 3060	1940	cmd.exe	timeout.exe
PID 1940 wrote to memory of 3060	1940	cmd.exe	timeout.exe
PID 1940 wrote to memory of 3060	1940	cmd.exe	timeout.exe
PID 1940 wrote to memory of 4588	1940	cmd.exe	dllhost.exe
PID 1940 wrote to memory of 4588	1940	cmd.exe	dllhost.exe
PID 1940 wrote to memory of 4588	1940	cmd.exe	dllhost.exe

C:\Users\Admin\AppData\Local\Temp\F5E715D046072F8716F662BB86A02BE3F13DD984ED207.exe
"C:\Users\Admin\AppData\Local\Temp\F5E715D046072F8716F662BB86A02BE3F13DD984ED207.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1044

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "dllhost" /tr '"C:\Users\Admin\AppData\Roaming\dllhost.exe"' & exit
2⤵
- Suspicious use of WriteProcessMemory
PID:3080

C:\Windows\SysWOW64\schtasks.exe
schtasks /create /f /sc onlogon /rl highest /tn "dllhost" /tr '"C:\Users\Admin\AppData\Roaming\dllhost.exe"'
3⤵
- Creates scheduled task(s)
PID:4432

C:\Windows\SysWOW64\cmd.exe
C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpA4C7.tmp.bat""
2⤵
- Suspicious use of WriteProcessMemory
PID:1940

C:\Windows\SysWOW64\timeout.exe
timeout 3
3⤵
- Delays execution with timeout.exe
PID:3060

C:\Users\Admin\AppData\Roaming\dllhost.exe
"C:\Users\Admin\AppData\Roaming\dllhost.exe"
3⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4588

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\tmpA4C7.tmp.bat
Filesize
151B

MD5
ec113f4c1bb20e51b55990a373026e22

SHA1
f5e504a601cefadff05a41457b1a21535bbf3cc5

SHA256
8b4218b16af1d3da63c22f893504a880e73111fb7ba3453299f0e20380918ed5

SHA512
17db8b747a79b292325f9598670506dd57dc10a25852874c3461af05470bc2b082bd31b941bd683e60141c795fd0a70630c503f263542c675bdd43ac1ce9bd01

Download Submit
C:\Users\Admin\AppData\Roaming\dllhost.exe
Filesize
176KB

MD5
f8b8c7e30a0c98c7db0c64d4b925db75

SHA1
928ec1e03d21f51f34da1a7c801fdce9a36b3c36

SHA256
f5e715d046072f8716f662bb86a02be3f13dd984ed207562c9e8e3feb6aeab40

SHA512
67d7c8c62877a0d274089ef062a85e1b0622bcb6ccfc86d3bd9234973af514e211c4a3043504c597429ade35524f314efecea75a4695bf5489e282fef3cedef3

Download Submit
C:\Users\Admin\AppData\Roaming\dllhost.exe
Filesize
176KB

MD5
f8b8c7e30a0c98c7db0c64d4b925db75

SHA1
928ec1e03d21f51f34da1a7c801fdce9a36b3c36

SHA256
f5e715d046072f8716f662bb86a02be3f13dd984ed207562c9e8e3feb6aeab40

SHA512
67d7c8c62877a0d274089ef062a85e1b0622bcb6ccfc86d3bd9234973af514e211c4a3043504c597429ade35524f314efecea75a4695bf5489e282fef3cedef3

Download Submit
memory/1044-132-0x0000000000180000-0x00000000001B2000-memory.dmp

Filesize
200KB

Download
memory/1044-133-0x00000000050C0000-0x000000000515C000-memory.dmp

Filesize
624KB

Download
memory/1940-135-0x0000000000000000-mapping.dmp

Download
memory/3060-138-0x0000000000000000-mapping.dmp

Download
memory/3080-134-0x0000000000000000-mapping.dmp

Download
memory/4432-137-0x0000000000000000-mapping.dmp

Download
memory/4588-139-0x0000000000000000-mapping.dmp

Download
memory/4588-142-0x0000000005E10000-0x00000000063B4000-memory.dmp

Filesize
5.6MB

Download
memory/4588-143-0x00000000058D0000-0x0000000005936000-memory.dmp

Filesize
408KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads