asyncrat | f5ee612748cedfd68340a5394f65072aa052d02820e5e8db5587ac36e53046be

General

Target
p.exe
Size 45KB
Sample261102-pkth8sttex
SHA256 f5ee612748cedfd68340a5394f65072aa052d02820e5e8db5587ac36e53046be
MD5 1d1934c74bbafed34ff53e4511a308b5
SHA1 2a96f2221fce85746ece71c98de5251cedb1bf36
SHA512 77ba655b63a946d5cbc0d403299155675de35a4f26c17d7fd7128c7bb6b12eff96dec2b2b3d8f4dc1b223e7e69a8716ab8d598544c93b369915efb7748fa30d0
SSDEEP 768:xuQSNTvEEaBrWUXFd5mo2qmiWv8n2+Fjw2NLPIPzjbfgXIiE3b8FWC0BDZex:xuQSNT8572xzv9Ew2CP3boXFE3bqCdex
TLSH
T171231B003BE8812BF2BE4F7499F26145467AF2677603D64D2CC452DB5713FC69A02AEE
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

default defense_evasion discovery execution asyncrat persistence rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

dagatructiep.boats:443

Mutex

ALETecoq00sa

Attributes

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

aes.plain

Signatures

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

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral1/files/0x00070000000243fd-9.dat	family_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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-747854149-4118156852-591593384-1000\Control Panel\International\Geo\Nation	p.exe

Executes dropped EXE 2 IoCs

pid	Process
2404	GoogleUpdate.exe
876	GoogleUpdate.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Executes a command shell one-liner 1 TTPs 2 IoCs

Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.

execution

Windows Command Shell

T1059.003

pid	Process
2816	cmd.exe
1480	cmd.exe

Reads the TCP/IP host and domain name from the registry 1 TTPs 4 IoCs

The configured hostname and DNS domain identify the machine and are commonly collected to profile a host before it reports in.

discovery

System Network Configuration Discovery

T1016

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Hostname	p.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Domain	p.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Hostname	GoogleUpdate.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Domain	GoogleUpdate.exe

System Location Discovery: System Language Discovery 1 TTPs 7 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	GoogleUpdate.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	GoogleUpdate.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	p.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
4012	timeout.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
3284	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
2272	p.exe
2272	p.exe
2272	p.exe
2272	p.exe
2272	p.exe
2272	p.exe
2272	p.exe
2272	p.exe
2272	p.exe
2272	p.exe
2272	p.exe
2272	p.exe
2272	p.exe
2272	p.exe
2272	p.exe
2272	p.exe
2272	p.exe
2272	p.exe
2272	p.exe
2272	p.exe
2272	p.exe
2272	p.exe
2272	p.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2272	p.exe
Token: SeDebugPrivilege	2404	GoogleUpdate.exe
Token: SeDebugPrivilege	2404	GoogleUpdate.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 2272 wrote to memory of 2816	2272	p.exe	89
PID 2272 wrote to memory of 1480	2272	p.exe	91
PID 1480 wrote to memory of 4012	1480	cmd.exe	93
PID 2816 wrote to memory of 3284	2816	cmd.exe	94
PID 1480 wrote to memory of 876	1480	cmd.exe	98

C:\Users\Admin\AppData\Local\Temp\p.exe
"C:\Users\Admin\AppData\Local\Temp\p.exe"
1⤵
- Checks computer location settings
- Reads the TCP/IP host and domain name from the registry
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2272
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "GoogleUpdate" /tr '"C:\Users\Admin\AppData\Roaming\GoogleUpdate.exe"' & exit
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2816
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "GoogleUpdate" /tr '"C:\Users\Admin\AppData\Roaming\GoogleUpdate.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:3284
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpCA8E.tmp.bat""
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1480
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:4012
- - C:\Users\Admin\AppData\Roaming\GoogleUpdate.exe
    "C:\Users\Admin\AppData\Roaming\GoogleUpdate.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:876

C:\Users\Admin\AppData\Roaming\GoogleUpdate.exe
"C:\Users\Admin\AppData\Roaming\GoogleUpdate.exe"
1⤵
- Executes dropped EXE
- Reads the TCP/IP host and domain name from the registry
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:2404

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

Windows Command Shell

1

T1059.003

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

System Network Configuration Discovery

1

T1016

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

tmpCA8E.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmpCA8E.tmp.bat
Size 156B
SHA256 d7383ac5d8260d200bcbae3c17b08edd78089b85f304b54326d706fb5a0f88bf
MD5 9730ac13d004ff0e9a409475773eaaf3
SHA1 99087d374c2150d7adf45e370f0c0c7e18d9d591
SHA512 b081860c4b4d3ae9f25ebe0d18c85186b9aefeb635cd8b8995cbac7cc6d5519a89f0a2e168a68d1ca35116f1d08b235667f580c117bad7ed9952bad070776368
TLSH
T1C2C08C5361C9EAAF2805A81B12BA988E91A268593E44AB00C30840192680888E4E9282
MD5 SHA1 SHA512 TLSH

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GoogleUpdate.exe

Path C:\Users\Admin\AppData\Roaming\GoogleUpdate.exe
Size 45KB
SHA256 f5ee612748cedfd68340a5394f65072aa052d02820e5e8db5587ac36e53046be
MD5 1d1934c74bbafed34ff53e4511a308b5
SHA1 2a96f2221fce85746ece71c98de5251cedb1bf36
SHA512 77ba655b63a946d5cbc0d403299155675de35a4f26c17d7fd7128c7bb6b12eff96dec2b2b3d8f4dc1b223e7e69a8716ab8d598544c93b369915efb7748fa30d0
SSDEEP 768:xuQSNTvEEaBrWUXFd5mo2qmiWv8n2+Fjw2NLPIPzjbfgXIiE3b8FWC0BDZex:xuQSNT8572xzv9Ew2CP3boXFE3bqCdex
TLSH
T171231B003BE8812BF2BE4F7499F26145467AF2677603D64D2CC452DB5713FC69A02AEE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/2272-0-0x0000000000B30000-0x0000000000B42000-memory.dmp

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memory/2272-1-0x0000000005500000-0x0000000005510000-memory.dmp

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memory/2272-2-0x0000000005510000-0x0000000005576000-memory.dmp

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memory/2272-3-0x0000000005950000-0x00000000059EC000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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