asyncrat | 8ae63775359fa46ab17567259a6a504c60113868d706c1649b7e404aa0343010

General

Target

0x00090000000122f1-69.exe
Size

45KB
MD5

4b3284d70137fee18f1068d0b3ec3819
SHA1

24a47e72ea5f76bbc37b0281bb24508b631157de
SHA256

8ae63775359fa46ab17567259a6a504c60113868d706c1649b7e404aa0343010
SHA512

693cb57ee01b48daa08c3165187d29aad402e8fe8341e1050c0e6bfc7463b2723a6e5c6af762457cffee8ae2836fb3c7f3a73dfdd1ff50d51abc1e8f970d525d
SSDEEP

768:zuQSNTvEEaBrWUXQd5mo2qmibq/aSh6PIRzjbfgX3imDRq/JyfBDZvx:zuQSNT8542x4qjDR3boXSgRndvx

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

C2

135.148.113.4:6789

Mutex

AsyncMutex_6SI8OkPnk

Attributes

delay
3
install
true
install_file
Service Host.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/2620-132-0x0000000000A40000-0x0000000000A52000-memory.dmp	asyncrat
C:\Users\Admin\AppData\Roaming\Service Host.exe	asyncrat
C:\Users\Admin\AppData\Roaming\Service Host.exe	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:

0x00090000000122f1-69.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\Control Panel\International\Geo\Nation	0x00090000000122f1-69.exe

Executes dropped EXE 1 IoCs

Processes:

Service Host.exe

pid process

4020 Service Host.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

2456 schtasks.exe
Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

4900 timeout.exe

pid	process
4020	Service Host.exe

pid	process
2456	schtasks.exe

pid	process
4900	timeout.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

Processes:

0x00090000000122f1-69.exe

pid	process
2620	0x00090000000122f1-69.exe
2620	0x00090000000122f1-69.exe
2620	0x00090000000122f1-69.exe
2620	0x00090000000122f1-69.exe
2620	0x00090000000122f1-69.exe
2620	0x00090000000122f1-69.exe
2620	0x00090000000122f1-69.exe
2620	0x00090000000122f1-69.exe
2620	0x00090000000122f1-69.exe
2620	0x00090000000122f1-69.exe
2620	0x00090000000122f1-69.exe
2620	0x00090000000122f1-69.exe
2620	0x00090000000122f1-69.exe
2620	0x00090000000122f1-69.exe
2620	0x00090000000122f1-69.exe
2620	0x00090000000122f1-69.exe
2620	0x00090000000122f1-69.exe
2620	0x00090000000122f1-69.exe
2620	0x00090000000122f1-69.exe
2620	0x00090000000122f1-69.exe
2620	0x00090000000122f1-69.exe
2620	0x00090000000122f1-69.exe
2620	0x00090000000122f1-69.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

0x00090000000122f1-69.exeService Host.exe

description pid process

Token: SeDebugPrivilege 2620 0x00090000000122f1-69.exe
Token: SeDebugPrivilege 4020 Service Host.exe

description	pid	process
Token: SeDebugPrivilege	2620	0x00090000000122f1-69.exe
Token: SeDebugPrivilege	4020	Service Host.exe

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

0x00090000000122f1-69.execmd.execmd.exe

description	pid	process	target process
PID 2620 wrote to memory of 4176	2620	0x00090000000122f1-69.exe	cmd.exe
PID 2620 wrote to memory of 4176	2620	0x00090000000122f1-69.exe	cmd.exe
PID 2620 wrote to memory of 4176	2620	0x00090000000122f1-69.exe	cmd.exe
PID 2620 wrote to memory of 1752	2620	0x00090000000122f1-69.exe	cmd.exe
PID 2620 wrote to memory of 1752	2620	0x00090000000122f1-69.exe	cmd.exe
PID 2620 wrote to memory of 1752	2620	0x00090000000122f1-69.exe	cmd.exe
PID 4176 wrote to memory of 2456	4176	cmd.exe	schtasks.exe
PID 4176 wrote to memory of 2456	4176	cmd.exe	schtasks.exe
PID 4176 wrote to memory of 2456	4176	cmd.exe	schtasks.exe
PID 1752 wrote to memory of 4900	1752	cmd.exe	timeout.exe
PID 1752 wrote to memory of 4900	1752	cmd.exe	timeout.exe
PID 1752 wrote to memory of 4900	1752	cmd.exe	timeout.exe
PID 1752 wrote to memory of 4020	1752	cmd.exe	Service Host.exe
PID 1752 wrote to memory of 4020	1752	cmd.exe	Service Host.exe
PID 1752 wrote to memory of 4020	1752	cmd.exe	Service Host.exe

C:\Users\Admin\AppData\Local\Temp\0x00090000000122f1-69.exe
"C:\Users\Admin\AppData\Local\Temp\0x00090000000122f1-69.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2620

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "Service Host" /tr '"C:\Users\Admin\AppData\Roaming\Service Host.exe"' & exit
2⤵
- Suspicious use of WriteProcessMemory
PID:4176

C:\Windows\SysWOW64\schtasks.exe
schtasks /create /f /sc onlogon /rl highest /tn "Service Host" /tr '"C:\Users\Admin\AppData\Roaming\Service Host.exe"'
3⤵
- Creates scheduled task(s)
PID:2456

C:\Windows\SysWOW64\cmd.exe
C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp7E4D.tmp.bat""
2⤵
- Suspicious use of WriteProcessMemory
PID:1752

C:\Windows\SysWOW64\timeout.exe
timeout 3
3⤵
- Delays execution with timeout.exe
PID:4900

C:\Users\Admin\AppData\Roaming\Service Host.exe
"C:\Users\Admin\AppData\Roaming\Service Host.exe"
3⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4020

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\tmp7E4D.tmp.bat
Filesize
156B

MD5
5fc6d68a8968670ada6bb2a9700ab841

SHA1
df708fc4bd3e87cc88b951153ae7cc12814a6d32

SHA256
e042d9538eca41e595aa6084e9bcf5c7a35c95cf67df92ca7db7d2bdf9b66217

SHA512
6ebca6f6c696a15d01365609f4ad035b472b3653a8cf3536e6163ca6b7615a8f5cce3287365fc9a8f6679628451d4d2655a7a31c7d30ded5eb1d028cd0a1d217

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

MD5
4b3284d70137fee18f1068d0b3ec3819

SHA1
24a47e72ea5f76bbc37b0281bb24508b631157de

SHA256
8ae63775359fa46ab17567259a6a504c60113868d706c1649b7e404aa0343010

SHA512
693cb57ee01b48daa08c3165187d29aad402e8fe8341e1050c0e6bfc7463b2723a6e5c6af762457cffee8ae2836fb3c7f3a73dfdd1ff50d51abc1e8f970d525d

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

MD5
4b3284d70137fee18f1068d0b3ec3819

SHA1
24a47e72ea5f76bbc37b0281bb24508b631157de

SHA256
8ae63775359fa46ab17567259a6a504c60113868d706c1649b7e404aa0343010

SHA512
693cb57ee01b48daa08c3165187d29aad402e8fe8341e1050c0e6bfc7463b2723a6e5c6af762457cffee8ae2836fb3c7f3a73dfdd1ff50d51abc1e8f970d525d

Download Submit
memory/1752-135-0x0000000000000000-mapping.dmp

Download
memory/2456-137-0x0000000000000000-mapping.dmp

Download
memory/2620-132-0x0000000000A40000-0x0000000000A52000-memory.dmp

Filesize
72KB

Download
memory/2620-133-0x0000000005500000-0x000000000559C000-memory.dmp

Filesize
624KB

Download
memory/4020-139-0x0000000000000000-mapping.dmp

Download
memory/4020-142-0x00000000066B0000-0x0000000006C54000-memory.dmp

Filesize
5.6MB

Download
memory/4020-143-0x0000000005C10000-0x0000000005C76000-memory.dmp

Filesize
408KB

Download
memory/4176-134-0x0000000000000000-mapping.dmp

Download
memory/4900-138-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads