asyncrat | 6d42ab03dc8bf128ef84fd8c6a33b113ac9961077f72ab94a353a5e4f05aac61

General

Target

fcf393b445d4f0b001d53e097db8e5fe_JaffaCakes118.exe
Size

71KB
MD5

fcf393b445d4f0b001d53e097db8e5fe
SHA1

8c46fdbab506cd8aa5cdec4a6347e9c655c387e3
SHA256

6d42ab03dc8bf128ef84fd8c6a33b113ac9961077f72ab94a353a5e4f05aac61
SHA512

d30371c10b63ce8a9649de204e19769f22b0e9c1a15938418556e79c4df2d80e72322f24afcfe5c0f2a6b02663c174c76f0e0c6c4bd923c1cf1f5b1e3fb4eacb
SSDEEP

1536:H9WXJ4FGFYQRVU6EkaS3Ystx7Adpf7PS5TSVHbFqZKdMF/gTwHMBy:UAw26Eka1sLeZ7PS5TSdFqZFoE

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

C2

remalarm.ddns.net:6606

remalarm.ddns.net:8808

Mutex

AsyncMutex_6SI8OkPnk

Attributes

delay
10
install
true
install_file
Test.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 4 IoCs

rat

Processes:

resource	yara_rule
behavioral1/memory/756-2-0x00000000004C0000-0x00000000004EC000-memory.dmp	family_asyncrat
behavioral1/memory/756-5-0x0000000000500000-0x0000000000512000-memory.dmp	family_asyncrat
behavioral1/memory/2628-21-0x0000000004AE0000-0x0000000004B20000-memory.dmp	family_asyncrat
behavioral1/memory/2628-22-0x0000000000380000-0x0000000000392000-memory.dmp	family_asyncrat

Executes dropped EXE 1 IoCs

Processes:

Test.exe

pid process

2628 Test.exe
Loads dropped DLL 1 IoCs

Processes:

cmd.exe

pid process

2636 cmd.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

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/Job
T1053

Processes:

schtasks.exe

pid process

1724 schtasks.exe
Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

2560 timeout.exe
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

fcf393b445d4f0b001d53e097db8e5fe_JaffaCakes118.exe

pid process

756 fcf393b445d4f0b001d53e097db8e5fe_JaffaCakes118.exe
756 fcf393b445d4f0b001d53e097db8e5fe_JaffaCakes118.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

fcf393b445d4f0b001d53e097db8e5fe_JaffaCakes118.exeTest.exe

description pid process

Token: SeDebugPrivilege 756 fcf393b445d4f0b001d53e097db8e5fe_JaffaCakes118.exe
Token: SeDebugPrivilege 2628 Test.exe

pid	process
2628	Test.exe

pid	process
2636	cmd.exe

pid	process
1724	schtasks.exe

pid	process
2560	timeout.exe

pid	process
756	fcf393b445d4f0b001d53e097db8e5fe_JaffaCakes118.exe
756	fcf393b445d4f0b001d53e097db8e5fe_JaffaCakes118.exe

description	pid	process
Token: SeDebugPrivilege	756	fcf393b445d4f0b001d53e097db8e5fe_JaffaCakes118.exe
Token: SeDebugPrivilege	2628	Test.exe

Suspicious use of WriteProcessMemory 20 IoCs

Processes:

fcf393b445d4f0b001d53e097db8e5fe_JaffaCakes118.execmd.execmd.exe

description	pid	process	target process
PID 756 wrote to memory of 2588	756	fcf393b445d4f0b001d53e097db8e5fe_JaffaCakes118.exe	cmd.exe
PID 756 wrote to memory of 2588	756	fcf393b445d4f0b001d53e097db8e5fe_JaffaCakes118.exe	cmd.exe
PID 756 wrote to memory of 2588	756	fcf393b445d4f0b001d53e097db8e5fe_JaffaCakes118.exe	cmd.exe
PID 756 wrote to memory of 2588	756	fcf393b445d4f0b001d53e097db8e5fe_JaffaCakes118.exe	cmd.exe
PID 756 wrote to memory of 2636	756	fcf393b445d4f0b001d53e097db8e5fe_JaffaCakes118.exe	cmd.exe
PID 756 wrote to memory of 2636	756	fcf393b445d4f0b001d53e097db8e5fe_JaffaCakes118.exe	cmd.exe
PID 756 wrote to memory of 2636	756	fcf393b445d4f0b001d53e097db8e5fe_JaffaCakes118.exe	cmd.exe
PID 756 wrote to memory of 2636	756	fcf393b445d4f0b001d53e097db8e5fe_JaffaCakes118.exe	cmd.exe
PID 2588 wrote to memory of 1724	2588	cmd.exe	schtasks.exe
PID 2588 wrote to memory of 1724	2588	cmd.exe	schtasks.exe
PID 2588 wrote to memory of 1724	2588	cmd.exe	schtasks.exe
PID 2588 wrote to memory of 1724	2588	cmd.exe	schtasks.exe
PID 2636 wrote to memory of 2560	2636	cmd.exe	timeout.exe
PID 2636 wrote to memory of 2560	2636	cmd.exe	timeout.exe
PID 2636 wrote to memory of 2560	2636	cmd.exe	timeout.exe
PID 2636 wrote to memory of 2560	2636	cmd.exe	timeout.exe
PID 2636 wrote to memory of 2628	2636	cmd.exe	Test.exe
PID 2636 wrote to memory of 2628	2636	cmd.exe	Test.exe
PID 2636 wrote to memory of 2628	2636	cmd.exe	Test.exe
PID 2636 wrote to memory of 2628	2636	cmd.exe	Test.exe

C:\Users\Admin\AppData\Local\Temp\fcf393b445d4f0b001d53e097db8e5fe_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\fcf393b445d4f0b001d53e097db8e5fe_JaffaCakes118.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:756
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "Test" /tr '"C:\Users\Admin\AppData\Roaming\Test.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2588
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "Test" /tr '"C:\Users\Admin\AppData\Roaming\Test.exe"'
    3⤵
    - Creates scheduled task(s)
    PID:1724
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp4CAA.tmp.bat""
  2⤵
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:2636
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:2560
- - C:\Users\Admin\AppData\Roaming\Test.exe
    "C:\Users\Admin\AppData\Roaming\Test.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:2628

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Persistence

Scheduled Task/Job

1

T1053

Privilege Escalation

Scheduled Task/Job

1

T1053

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp4CAA.tmp.bat

Filesize
148B

MD5
91db93b2a18545a1be590a8a1687ce59

SHA1
7234f6e59975a48fdc19efb63a6473a9ed80eab6

SHA256
98878fa193887abeaf5287e77e5ba847bb8f4d79391817e12fe028b623df4e13

SHA512
6e71ad0dd124211dd71778f4d5e3983ba3dfb2f70a5127a920b8b4e804d1799a7e2ae4dfa616aff4d9a44101720120db18f9784c51e2b9cb593f4623110c45d7

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

Filesize
71KB

MD5
fcf393b445d4f0b001d53e097db8e5fe

SHA1
8c46fdbab506cd8aa5cdec4a6347e9c655c387e3

SHA256
6d42ab03dc8bf128ef84fd8c6a33b113ac9961077f72ab94a353a5e4f05aac61

SHA512
d30371c10b63ce8a9649de204e19769f22b0e9c1a15938418556e79c4df2d80e72322f24afcfe5c0f2a6b02663c174c76f0e0c6c4bd923c1cf1f5b1e3fb4eacb

Download Submit
memory/756-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/756-0-0x00000000008A0000-0x00000000008B8000-memory.dmp

Filesize
96KB

Download
memory/756-4-0x00000000006A0000-0x00000000006E0000-memory.dmp

Filesize
256KB

Download
memory/756-5-0x0000000000500000-0x0000000000512000-memory.dmp

Filesize
72KB

Download
memory/756-2-0x00000000004C0000-0x00000000004EC000-memory.dmp

Filesize
176KB

Download
memory/756-15-0x0000000074820000-0x0000000074F0E000-memory.dmp

Filesize
6.9MB

Download
memory/756-1-0x0000000074820000-0x0000000074F0E000-memory.dmp

Filesize
6.9MB

Download
memory/2628-20-0x00000000747D0000-0x0000000074EBE000-memory.dmp

Filesize
6.9MB

Download
memory/2628-19-0x00000000008D0000-0x00000000008E8000-memory.dmp

Filesize
96KB

Download
memory/2628-21-0x0000000004AE0000-0x0000000004B20000-memory.dmp

Filesize
256KB

Download
memory/2628-22-0x0000000000380000-0x0000000000392000-memory.dmp

Filesize
72KB

Download
memory/2628-23-0x00000000747D0000-0x0000000074EBE000-memory.dmp

Filesize
6.9MB

Download
memory/2628-24-0x0000000004AE0000-0x0000000004B20000-memory.dmp

Filesize
256KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads