asyncrat | aa199fbb289e048c5abaa334be3eb172175cf53e736d3a15ca32549086c99a8c

General

Target

shadow.exe
Size

45KB
MD5

b0c54754039e4c312c81cc1de388e1e6
SHA1

c00e8d078f1224156e5f34720732891afe72d654
SHA256

aa199fbb289e048c5abaa334be3eb172175cf53e736d3a15ca32549086c99a8c
SHA512

c58117d3f377b6b7c1bba94d56049927a2a0e76e4243fa217ed8af1e80365939a5d3441572dea3c079403c07cad36ffebd35703e69fb258518244f2ca25d8bc8
SSDEEP

768:DuU2VTwkbBHWU7TZcFmo2qjLKjGKG6PIyzjbFgX3i0ZHPcZekvlaBDZDx:DuU2VTwAJM2aKYDy3bCXS0ZC+dDx

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

C2

klept0wiz-33913.portmap.host:33913

Mutex

guaeiofj398ajgka340gka9wk3f09jq3ad

Attributes

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

aes.plain

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
rat asyncrat

Async RAT payload 3 IoCs

rat

Processes:

resource	yara_rule
behavioral2/memory/4768-133-0x0000000000510000-0x0000000000522000-memory.dmp	asyncrat
C:\Users\Admin\AppData\Roaming\Management.exe	asyncrat
C:\Users\Admin\AppData\Roaming\Management.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:

shadow.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\Control Panel\International\Geo\Nation shadow.exe
Executes dropped EXE 1 IoCs

Processes:

Management.exe

pid process

3336 Management.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

1156 schtasks.exe
Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

1340 timeout.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\Control Panel\International\Geo\Nation	shadow.exe

pid	process
3336	Management.exe

pid	process
1156	schtasks.exe

pid	process
1340	timeout.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

Processes:

shadow.exe

pid	process
4768	shadow.exe
4768	shadow.exe
4768	shadow.exe
4768	shadow.exe
4768	shadow.exe
4768	shadow.exe
4768	shadow.exe
4768	shadow.exe
4768	shadow.exe
4768	shadow.exe
4768	shadow.exe
4768	shadow.exe
4768	shadow.exe
4768	shadow.exe
4768	shadow.exe
4768	shadow.exe
4768	shadow.exe
4768	shadow.exe
4768	shadow.exe
4768	shadow.exe
4768	shadow.exe
4768	shadow.exe
4768	shadow.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

shadow.exeManagement.exe

description pid process

Token: SeDebugPrivilege 4768 shadow.exe
Token: SeDebugPrivilege 3336 Management.exe

description	pid	process
Token: SeDebugPrivilege	4768	shadow.exe
Token: SeDebugPrivilege	3336	Management.exe

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

shadow.execmd.execmd.exe

description	pid	process	target process
PID 4768 wrote to memory of 1788	4768	shadow.exe	cmd.exe
PID 4768 wrote to memory of 1788	4768	shadow.exe	cmd.exe
PID 4768 wrote to memory of 1788	4768	shadow.exe	cmd.exe
PID 4768 wrote to memory of 2296	4768	shadow.exe	cmd.exe
PID 4768 wrote to memory of 2296	4768	shadow.exe	cmd.exe
PID 4768 wrote to memory of 2296	4768	shadow.exe	cmd.exe
PID 2296 wrote to memory of 1340	2296	cmd.exe	timeout.exe
PID 2296 wrote to memory of 1340	2296	cmd.exe	timeout.exe
PID 2296 wrote to memory of 1340	2296	cmd.exe	timeout.exe
PID 1788 wrote to memory of 1156	1788	cmd.exe	schtasks.exe
PID 1788 wrote to memory of 1156	1788	cmd.exe	schtasks.exe
PID 1788 wrote to memory of 1156	1788	cmd.exe	schtasks.exe
PID 2296 wrote to memory of 3336	2296	cmd.exe	Management.exe
PID 2296 wrote to memory of 3336	2296	cmd.exe	Management.exe
PID 2296 wrote to memory of 3336	2296	cmd.exe	Management.exe

C:\Users\Admin\AppData\Local\Temp\shadow.exe
"C:\Users\Admin\AppData\Local\Temp\shadow.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4768

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "Management" /tr '"C:\Users\Admin\AppData\Roaming\Management.exe"' & exit
2⤵
- Suspicious use of WriteProcessMemory
PID:1788

C:\Windows\SysWOW64\schtasks.exe
schtasks /create /f /sc onlogon /rl highest /tn "Management" /tr '"C:\Users\Admin\AppData\Roaming\Management.exe"'
3⤵
- Creates scheduled task(s)
PID:1156

C:\Windows\SysWOW64\cmd.exe
C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpA146.tmp.bat""
2⤵
- Suspicious use of WriteProcessMemory
PID:2296

C:\Windows\SysWOW64\timeout.exe
timeout 3
3⤵
- Delays execution with timeout.exe
PID:1340

C:\Users\Admin\AppData\Roaming\Management.exe
"C:\Users\Admin\AppData\Roaming\Management.exe"
3⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3336

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\tmpA146.tmp.bat
Filesize
154B

MD5
2f9abb55f79f346255855184c4f7834f

SHA1
1641bbfef9ff836325b7ba07743211abb7905907

SHA256
79bfb63029e507c754848633396bea242f46af94ebf93920ca9d6e25c7fa0d11

SHA512
1b9eb9ebbf61f233c699387e8b9fab81d77f9f103272d7522a43b314dfba2164e27b87640ce5acb4b1bf29f0db0453abd8a7fc2a889bcd279ecad2beca7d3d0a

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

MD5
b0c54754039e4c312c81cc1de388e1e6

SHA1
c00e8d078f1224156e5f34720732891afe72d654

SHA256
aa199fbb289e048c5abaa334be3eb172175cf53e736d3a15ca32549086c99a8c

SHA512
c58117d3f377b6b7c1bba94d56049927a2a0e76e4243fa217ed8af1e80365939a5d3441572dea3c079403c07cad36ffebd35703e69fb258518244f2ca25d8bc8

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

MD5
b0c54754039e4c312c81cc1de388e1e6

SHA1
c00e8d078f1224156e5f34720732891afe72d654

SHA256
aa199fbb289e048c5abaa334be3eb172175cf53e736d3a15ca32549086c99a8c

SHA512
c58117d3f377b6b7c1bba94d56049927a2a0e76e4243fa217ed8af1e80365939a5d3441572dea3c079403c07cad36ffebd35703e69fb258518244f2ca25d8bc8

Download Submit
memory/3336-144-0x0000000002330000-0x0000000002340000-memory.dmp

Filesize
64KB

Download
memory/3336-145-0x0000000002330000-0x0000000002340000-memory.dmp

Filesize
64KB

Download
memory/4768-133-0x0000000000510000-0x0000000000522000-memory.dmp

Filesize
72KB

Download
memory/4768-134-0x0000000004CF0000-0x0000000004D00000-memory.dmp

Filesize
64KB

Download
memory/4768-135-0x00000000050A0000-0x000000000513C000-memory.dmp

Filesize
624KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads