asyncrat | 32e9232c14e3ddbe71f437caaca8f3ea699b81a7479590527d7ed8969b5a4a1a

General

Target

5b8f4ac518b63ad22760cccdce780111_JaffaCakes118.exe
Size

45KB
MD5

5b8f4ac518b63ad22760cccdce780111
SHA1

9dbbaa605d00f2810047d03553468d68cae09627
SHA256

32e9232c14e3ddbe71f437caaca8f3ea699b81a7479590527d7ed8969b5a4a1a
SHA512

9d66eb70b9fe49318492d0fd01711c007a45aa6b73886738c51341e275dbc5bc356fd65b6c651a84807e96cceae0a16736588dee45cf02ec3c6760c0e0ebd8a4
SSDEEP

768:C6tKW2VIifsg3ACjeG6KLDiFdBTebkhvd/rduYmjOfxQ1Gg+xMLMx:C610j6TrqbwvRr5SOZKGbxMLMx

Score

10^/10

asyncrat minecraftsborka discovery rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

MinecraftSborka

C2

8.tcp.ngrok.io:30397

Mutex

AsyncMutex_6SI8OkPnk

Attributes

delay
3
install
true
install_file
spoolsv.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 1 IoCs

rat

Processes:

resource	yara_rule
\Users\Admin\AppData\Roaming\spoolsv.exe	family_asyncrat

Executes dropped EXE 1 IoCs

Processes:

spoolsv.exe

pid process

2636 spoolsv.exe
Loads dropped DLL 1 IoCs

Processes:

cmd.exe

pid process

2704 cmd.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
2636	spoolsv.exe

pid	process
2704	cmd.exe

System Location Discovery: System Language Discovery 1 TTPs 6 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

Processes:

cmd.execmd.exetimeout.exeschtasks.exespoolsv.exe5b8f4ac518b63ad22760cccdce780111_JaffaCakes118.exe

description	ioc	process
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	spoolsv.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	5b8f4ac518b63ad22760cccdce780111_JaffaCakes118.exe

Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

1340 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

Processes:

schtasks.exe

pid process

2736 schtasks.exe

pid	process
1340	timeout.exe

pid	process
2736	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

Processes:

5b8f4ac518b63ad22760cccdce780111_JaffaCakes118.exe

pid	process
2848	5b8f4ac518b63ad22760cccdce780111_JaffaCakes118.exe
2848	5b8f4ac518b63ad22760cccdce780111_JaffaCakes118.exe
2848	5b8f4ac518b63ad22760cccdce780111_JaffaCakes118.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

5b8f4ac518b63ad22760cccdce780111_JaffaCakes118.exespoolsv.exe

description pid process

Token: SeDebugPrivilege 2848 5b8f4ac518b63ad22760cccdce780111_JaffaCakes118.exe
Token: SeDebugPrivilege 2636 spoolsv.exe

description	pid	process
Token: SeDebugPrivilege	2848	5b8f4ac518b63ad22760cccdce780111_JaffaCakes118.exe
Token: SeDebugPrivilege	2636	spoolsv.exe

Suspicious use of WriteProcessMemory 20 IoCs

Processes:

5b8f4ac518b63ad22760cccdce780111_JaffaCakes118.execmd.execmd.exe

description	pid	process	target process
PID 2848 wrote to memory of 2696	2848	5b8f4ac518b63ad22760cccdce780111_JaffaCakes118.exe	cmd.exe
PID 2848 wrote to memory of 2696	2848	5b8f4ac518b63ad22760cccdce780111_JaffaCakes118.exe	cmd.exe
PID 2848 wrote to memory of 2696	2848	5b8f4ac518b63ad22760cccdce780111_JaffaCakes118.exe	cmd.exe
PID 2848 wrote to memory of 2696	2848	5b8f4ac518b63ad22760cccdce780111_JaffaCakes118.exe	cmd.exe
PID 2848 wrote to memory of 2704	2848	5b8f4ac518b63ad22760cccdce780111_JaffaCakes118.exe	cmd.exe
PID 2848 wrote to memory of 2704	2848	5b8f4ac518b63ad22760cccdce780111_JaffaCakes118.exe	cmd.exe
PID 2848 wrote to memory of 2704	2848	5b8f4ac518b63ad22760cccdce780111_JaffaCakes118.exe	cmd.exe
PID 2848 wrote to memory of 2704	2848	5b8f4ac518b63ad22760cccdce780111_JaffaCakes118.exe	cmd.exe
PID 2704 wrote to memory of 1340	2704	cmd.exe	timeout.exe
PID 2704 wrote to memory of 1340	2704	cmd.exe	timeout.exe
PID 2704 wrote to memory of 1340	2704	cmd.exe	timeout.exe
PID 2704 wrote to memory of 1340	2704	cmd.exe	timeout.exe
PID 2696 wrote to memory of 2736	2696	cmd.exe	schtasks.exe
PID 2696 wrote to memory of 2736	2696	cmd.exe	schtasks.exe
PID 2696 wrote to memory of 2736	2696	cmd.exe	schtasks.exe
PID 2696 wrote to memory of 2736	2696	cmd.exe	schtasks.exe
PID 2704 wrote to memory of 2636	2704	cmd.exe	spoolsv.exe
PID 2704 wrote to memory of 2636	2704	cmd.exe	spoolsv.exe
PID 2704 wrote to memory of 2636	2704	cmd.exe	spoolsv.exe
PID 2704 wrote to memory of 2636	2704	cmd.exe	spoolsv.exe

C:\Users\Admin\AppData\Local\Temp\5b8f4ac518b63ad22760cccdce780111_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\5b8f4ac518b63ad22760cccdce780111_JaffaCakes118.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2848

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "spoolsv" /tr '"C:\Users\Admin\AppData\Roaming\spoolsv.exe"' & exit
2⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2696

C:\Windows\SysWOW64\schtasks.exe
schtasks /create /f /sc onlogon /rl highest /tn "spoolsv" /tr '"C:\Users\Admin\AppData\Roaming\spoolsv.exe"'
3⤵
- System Location Discovery: System Language Discovery
- Scheduled Task/Job: Scheduled Task
PID:2736

C:\Windows\SysWOW64\cmd.exe
cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpFBEC.tmp.bat""
2⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2704

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

C:\Users\Admin\AppData\Roaming\spoolsv.exe
"C:\Users\Admin\AppData\Roaming\spoolsv.exe"
3⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:2636

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

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

System Information Discovery

1

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

C:\Users\Admin\AppData\Local\Temp\tmpFBEC.tmp.bat

Filesize
151B

MD5
d7fc977b4b1ca61e00037647a8e2dbb8

SHA1
e54b53558a9493e76f445b8882b59f7766634b45

SHA256
71626ac5afc6859c54da971a4fee0fe12865b850ac63ea5f7b0fbf56986d5ac8

SHA512
0af45d3fd676dd56fc5c5925c5e6eb67ed8adf1d9f1341be83e9cfd031ad37414dd22cf2e7b97f379be432f68800dd4932f3ef6bc9dcfef783f99449c099cdc1

Download Submit
\Users\Admin\AppData\Roaming\spoolsv.exe

Filesize
45KB

MD5
5b8f4ac518b63ad22760cccdce780111

SHA1
9dbbaa605d00f2810047d03553468d68cae09627

SHA256
32e9232c14e3ddbe71f437caaca8f3ea699b81a7479590527d7ed8969b5a4a1a

SHA512
9d66eb70b9fe49318492d0fd01711c007a45aa6b73886738c51341e275dbc5bc356fd65b6c651a84807e96cceae0a16736588dee45cf02ec3c6760c0e0ebd8a4

Download Submit
memory/2636-16-0x0000000000860000-0x0000000000872000-memory.dmp

Filesize
72KB

Download
memory/2848-0-0x0000000074D5E000-0x0000000074D5F000-memory.dmp

Filesize
4KB

Download
memory/2848-1-0x00000000012A0000-0x00000000012B2000-memory.dmp

Filesize
72KB

Download
memory/2848-2-0x0000000074D50000-0x000000007543E000-memory.dmp

Filesize
6.9MB

Download
memory/2848-11-0x0000000074D50000-0x000000007543E000-memory.dmp

Filesize
6.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads