asyncrat | d5463f3c3336d7556051a09ffa19f5b80501e83422268063f6ef201db726dd11

General

Target
TrojanRAT.exe
Size 56KB
Sample260722-j2cdds1gkc
SHA256 d5463f3c3336d7556051a09ffa19f5b80501e83422268063f6ef201db726dd11
MD5 06125d7914c5794606ae718f1df8975e
SHA1 6a0ab3a3c779a46c8ea7d13257e24aeac97b438a
SHA512 c22e027448adbb049875c3298bab6cf16218c6e4d11b2f022383ced93b28a81eb229f81f6ba2298635742d0ef0869a8567e5bfd4587ddcec039ca89861ae8b04
SSDEEP 1536:OuskdTsnb23lYJ9ebOXSWadlkejNUHLTq:OusITsnb21YJ9ebOxarkINmq
TLSH
T1D5436C0037E98127F2BE5FB8ACF22145467AF2676603D95D1CC4518B5713BC6DA02AFE
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

milkboxhq.it.com:443
milkboxhq.it.com:8848
milkboxhq.it.com:8080

Mutex

kBVPjakHQ19X

Attributes

delay
3
install
true
install_file
AsyncRat.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/0x00030000000232ad-8.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-1-5-21-3053180483-1881419501-3594244048-1000\Control Panel\International\Geo\Nation	TrojanRAT.exe

Executes dropped EXE 2 IoCs

pid	Process
5668	AsyncRat.exe
5776	AsyncRat.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
6060	cmd.exe
2352	cmd.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	AsyncRat.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	TrojanRAT.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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	AsyncRat.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
5052	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
6132	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
3024	TrojanRAT.exe
3024	TrojanRAT.exe
3024	TrojanRAT.exe
3024	TrojanRAT.exe
3024	TrojanRAT.exe
3024	TrojanRAT.exe
3024	TrojanRAT.exe
3024	TrojanRAT.exe
3024	TrojanRAT.exe
3024	TrojanRAT.exe
3024	TrojanRAT.exe
3024	TrojanRAT.exe
3024	TrojanRAT.exe
3024	TrojanRAT.exe
3024	TrojanRAT.exe
3024	TrojanRAT.exe
3024	TrojanRAT.exe
3024	TrojanRAT.exe
3024	TrojanRAT.exe
3024	TrojanRAT.exe
3024	TrojanRAT.exe
3024	TrojanRAT.exe
3024	TrojanRAT.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3024	TrojanRAT.exe
Token: SeDebugPrivilege	5668	AsyncRat.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 3024 wrote to memory of 6060	3024	TrojanRAT.exe	86
PID 3024 wrote to memory of 2352	3024	TrojanRAT.exe	88
PID 2352 wrote to memory of 5052	2352	cmd.exe	90
PID 6060 wrote to memory of 6132	6060	cmd.exe	91
PID 2352 wrote to memory of 5776	2352	cmd.exe	94

C:\Users\Admin\AppData\Local\Temp\TrojanRAT.exe
"C:\Users\Admin\AppData\Local\Temp\TrojanRAT.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3024
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "AsyncRat" /tr '"C:\Users\Admin\AppData\Roaming\AsyncRat.exe"' & exit
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:6060
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "AsyncRat" /tr '"C:\Users\Admin\AppData\Roaming\AsyncRat.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:6132
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp71A1.tmp.bat""
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2352
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:5052
- - C:\Users\Admin\AppData\Roaming\AsyncRat.exe
    "C:\Users\Admin\AppData\Roaming\AsyncRat.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:5776

C:\Users\Admin\AppData\Roaming\AsyncRat.exe
"C:\Users\Admin\AppData\Roaming\AsyncRat.exe"
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:5668

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

tmp71A1.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp71A1.tmp.bat
Size 152B
SHA256 9ba9128cc15167ab4e15a65b1ca24e54afa038a230fd7837c07037f951706a30
MD5 000af7a516ac69c82bd2c033e48085cd
SHA1 c4201d33531a8161ba27d0462f82a13a579f8968
SHA512 2a20ee129b5ef4147e2271fd93966c245ad404bfc10a5241b870dd165da4949208b389c6f9f07ddf4d4ad336517eeb86d4b1253c6620a45c5c30c02342694b19
TLSH
T106C02B5292C5EB1F2C05345313FADC8C92766C5D3F40BB80C30844AD138054DF4EA342
MD5 SHA1 SHA512 TLSH

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AsyncRat.exe

Path C:\Users\Admin\AppData\Roaming\AsyncRat.exe
Size 56KB
SHA256 d5463f3c3336d7556051a09ffa19f5b80501e83422268063f6ef201db726dd11
MD5 06125d7914c5794606ae718f1df8975e
SHA1 6a0ab3a3c779a46c8ea7d13257e24aeac97b438a
SHA512 c22e027448adbb049875c3298bab6cf16218c6e4d11b2f022383ced93b28a81eb229f81f6ba2298635742d0ef0869a8567e5bfd4587ddcec039ca89861ae8b04
SSDEEP 1536:OuskdTsnb23lYJ9ebOXSWadlkejNUHLTq:OusITsnb21YJ9ebOxarkINmq
TLSH
T1D5436C0037E98127F2BE5FB8ACF22145467AF2676603D95D1CC4518B5713BC6DA02AFE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/3024-0-0x00000000005F0000-0x0000000000604000-memory.dmp

Download

memory/3024-1-0x00000000050D0000-0x00000000050E0000-memory.dmp

Download

memory/3024-2-0x0000000004FE0000-0x000000000507C000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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