asyncrat | 1ee1af228d0cfcf2beae5a2df53a291d24fb6213c5e453cfb09c155b20a7a965

General

Target

Infected.exe
Size

63KB
MD5

abcbbfd4f4cdcef98962ad976802fb69
SHA1

ecce5776a92707e00b28441975e73a715f9e2185
SHA256

1ee1af228d0cfcf2beae5a2df53a291d24fb6213c5e453cfb09c155b20a7a965
SHA512

e38348d3f6983e02378dd4649630fd0a39ad6428bc82aa6f2738f1ec794b9b48db7457b3009f7f65e49fc5d994dcde6105fdf72bd572086d8017558aab541100
SSDEEP

768:RdGnVhwdjndk78TQC8A+XiuazcBRL5JTk1+T4KSBGHmDbD/ph0oXQxa/qSuAdpqM:mnSdsNdSJYUbdh9QxaFuAdpqKmY7

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Botnet

Default

C2

mbaper-28496.portmap.host:2420

mbaper-28496.portmap.host:28833

Attributes

delay
1
install
true
install_file
Google.exe
install_folder
%AppData%

aes.plain

Signatures

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

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral2/files/0x0008000000023cbd-11.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-1-5-21-493223053-2004649691-1575712786-1000\Control Panel\International\Geo\Nation	Infected.exe

Executes dropped EXE 1 IoCs

pid	Process
3196	Google.exe

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

System Information Discovery
T1082

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1624	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
4688	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
4832	Infected.exe
4832	Infected.exe
4832	Infected.exe
4832	Infected.exe
4832	Infected.exe
4832	Infected.exe
4832	Infected.exe
4832	Infected.exe
4832	Infected.exe
4832	Infected.exe
4832	Infected.exe
4832	Infected.exe
4832	Infected.exe
4832	Infected.exe
4832	Infected.exe
4832	Infected.exe
4832	Infected.exe
4832	Infected.exe
4832	Infected.exe
4832	Infected.exe
4832	Infected.exe
4832	Infected.exe
4832	Infected.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4832	Infected.exe
Token: SeDebugPrivilege	3196	Google.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 4832 wrote to memory of 5044	4832	Infected.exe	85
PID 4832 wrote to memory of 5044	4832	Infected.exe	85
PID 4832 wrote to memory of 3604	4832	Infected.exe	86
PID 4832 wrote to memory of 3604	4832	Infected.exe	86
PID 3604 wrote to memory of 1624	3604	cmd.exe	89
PID 3604 wrote to memory of 1624	3604	cmd.exe	89
PID 5044 wrote to memory of 4688	5044	cmd.exe	90
PID 5044 wrote to memory of 4688	5044	cmd.exe	90
PID 3604 wrote to memory of 3196	3604	cmd.exe	92
PID 3604 wrote to memory of 3196	3604	cmd.exe	92

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\Infected.exe
"C:\Users\Admin\AppData\Local\Temp\Infected.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4832
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "Google" /tr '"C:\Users\Admin\AppData\Roaming\Google.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:5044
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "Google" /tr '"C:\Users\Admin\AppData\Roaming\Google.exe"'
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:4688
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpAE80.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3604
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:1624
- - C:\Users\Admin\AppData\Roaming\Google.exe
    "C:\Users\Admin\AppData\Roaming\Google.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:3196

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

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmpAE80.tmp.bat

Filesize
150B

MD5
a11e9f87931a580ad8c6b0ab3200ea26

SHA1
bcade5ef5551904e74948820a570fd34c9324f72

SHA256
48c99c83f103a46d5dfc7fefd33012485b35f454cb1024ce33fccfdec7454274

SHA512
4ed8324288c71e9507f43e3d1812aea1eb00a6aad0278e75f2444abd3de0a50d13f269b8405845deca6d78825d1d1e28b899ee9c2e771f2aad3113ced29a43f1

Download Submit
C:\Users\Admin\AppData\Roaming\Google.exe

Filesize
63KB

MD5
abcbbfd4f4cdcef98962ad976802fb69

SHA1
ecce5776a92707e00b28441975e73a715f9e2185

SHA256
1ee1af228d0cfcf2beae5a2df53a291d24fb6213c5e453cfb09c155b20a7a965

SHA512
e38348d3f6983e02378dd4649630fd0a39ad6428bc82aa6f2738f1ec794b9b48db7457b3009f7f65e49fc5d994dcde6105fdf72bd572086d8017558aab541100

Download Submit
memory/3196-15-0x000000001D100000-0x000000001D176000-memory.dmp

Filesize
472KB

Download
memory/3196-16-0x000000001D080000-0x000000001D0B4000-memory.dmp

Filesize
208KB

Download
memory/3196-17-0x000000001D0D0000-0x000000001D0EE000-memory.dmp

Filesize
120KB

Download
memory/4832-0-0x00007FF976223000-0x00007FF976225000-memory.dmp

Filesize
8KB

Download
memory/4832-1-0x0000000000A70000-0x0000000000A86000-memory.dmp

Filesize
88KB

Download
memory/4832-2-0x00007FF976220000-0x00007FF976CE1000-memory.dmp

Filesize
10.8MB

Download
memory/4832-7-0x00007FF976220000-0x00007FF976CE1000-memory.dmp

Filesize
10.8MB

Download
memory/4832-8-0x00007FF976220000-0x00007FF976CE1000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads