asyncrat | 97a47ec80b071d3d18bca405cbbb3984d3d364745852142a09ec75312e5eefb2

General

Target

26597663fcdb8fc32e2076bd5834889a.exe
Size

47KB
MD5

26597663fcdb8fc32e2076bd5834889a
SHA1

43b23ed222226e50c3ddc633ba9fb53457a7178d
SHA256

97a47ec80b071d3d18bca405cbbb3984d3d364745852142a09ec75312e5eefb2
SHA512

5dd946e9815c2ce3a1dae39c153d4c110f6273ae46fc953bc39e4a57eb50b43fb2eea974efc8fd9d4badd9cf141b7bd95bb50a754199d61332dc65b50e250078

Score

10^/10

asyncrat 08_25_21 rat

Malware Config

Extracted

Family

asyncrat

Version

1.0.7

Botnet

08_25_21

C2

service32.sytes.net:8080

Mutex

fgwajhfuw vnajskdhvfuqow

Attributes

anti_vm
false
bsod
false
delay
15
install
true
install_file
update.exe
install_folder
%AppData%
pastebin_config
null

aes.plain

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers.
rat asyncrat

Async RAT payload 2 IoCs

rat

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Roaming\update.exe	asyncrat
C:\Users\Admin\AppData\Roaming\update.exe	asyncrat

Executes dropped EXE 1 IoCs

Processes:

update.exe

pid process

1756 update.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

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
T1053

Processes:

schtasks.exe

pid process

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

Processes:

timeout.exe

pid process

1896 timeout.exe
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

26597663fcdb8fc32e2076bd5834889a.exe

pid process

1208 26597663fcdb8fc32e2076bd5834889a.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

26597663fcdb8fc32e2076bd5834889a.exeupdate.exe

description pid process

Token: SeDebugPrivilege 1208 26597663fcdb8fc32e2076bd5834889a.exe
Token: SeDebugPrivilege 1756 update.exe

pid	process
1756	update.exe

pid	process
640	schtasks.exe

pid	process
1896	timeout.exe

pid	process
1208	26597663fcdb8fc32e2076bd5834889a.exe

description	pid	process
Token: SeDebugPrivilege	1208	26597663fcdb8fc32e2076bd5834889a.exe
Token: SeDebugPrivilege	1756	update.exe

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

26597663fcdb8fc32e2076bd5834889a.execmd.execmd.exe

description	pid	process	target process
PID 1208 wrote to memory of 524	1208	26597663fcdb8fc32e2076bd5834889a.exe	cmd.exe
PID 1208 wrote to memory of 524	1208	26597663fcdb8fc32e2076bd5834889a.exe	cmd.exe
PID 1208 wrote to memory of 524	1208	26597663fcdb8fc32e2076bd5834889a.exe	cmd.exe
PID 1208 wrote to memory of 1172	1208	26597663fcdb8fc32e2076bd5834889a.exe	cmd.exe
PID 1208 wrote to memory of 1172	1208	26597663fcdb8fc32e2076bd5834889a.exe	cmd.exe
PID 1208 wrote to memory of 1172	1208	26597663fcdb8fc32e2076bd5834889a.exe	cmd.exe
PID 524 wrote to memory of 640	524	cmd.exe	schtasks.exe
PID 524 wrote to memory of 640	524	cmd.exe	schtasks.exe
PID 524 wrote to memory of 640	524	cmd.exe	schtasks.exe
PID 1172 wrote to memory of 1896	1172	cmd.exe	timeout.exe
PID 1172 wrote to memory of 1896	1172	cmd.exe	timeout.exe
PID 1172 wrote to memory of 1896	1172	cmd.exe	timeout.exe
PID 1172 wrote to memory of 1756	1172	cmd.exe	update.exe
PID 1172 wrote to memory of 1756	1172	cmd.exe	update.exe
PID 1172 wrote to memory of 1756	1172	cmd.exe	update.exe

C:\Users\Admin\AppData\Local\Temp\26597663fcdb8fc32e2076bd5834889a.exe
"C:\Users\Admin\AppData\Local\Temp\26597663fcdb8fc32e2076bd5834889a.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1208
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "update" /tr '"C:\Users\Admin\AppData\Roaming\update.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:524
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "update" /tr '"C:\Users\Admin\AppData\Roaming\update.exe"'
    3⤵
    - Creates scheduled task(s)
    PID:640
- C:\Windows\system32\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpF096.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1172
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:1896
- - C:\Users\Admin\AppData\Roaming\update.exe
    "C:\Users\Admin\AppData\Roaming\update.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:1756

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

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\tmpF096.tmp.bat

MD5
dc8e22082a1cc0802a4de0cdaa3aef13

SHA1
df5ec248cd8f0a23b74c97ee6e067ebe2e671b19

SHA256
7dd6575516e8ec96521230c77880fd144ad60a31c252a636ce50460d17534ce9

SHA512
1e03adddcac7ebab422edade387c54aef46d553353992e6ee4e6fa422f243f9ca80cae9180e09088169bddc0d87c720fea775fede73a3a43e4098e76b512b873

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

MD5
26597663fcdb8fc32e2076bd5834889a

SHA1
43b23ed222226e50c3ddc633ba9fb53457a7178d

SHA256
97a47ec80b071d3d18bca405cbbb3984d3d364745852142a09ec75312e5eefb2

SHA512
5dd946e9815c2ce3a1dae39c153d4c110f6273ae46fc953bc39e4a57eb50b43fb2eea974efc8fd9d4badd9cf141b7bd95bb50a754199d61332dc65b50e250078

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

MD5
26597663fcdb8fc32e2076bd5834889a

SHA1
43b23ed222226e50c3ddc633ba9fb53457a7178d

SHA256
97a47ec80b071d3d18bca405cbbb3984d3d364745852142a09ec75312e5eefb2

SHA512
5dd946e9815c2ce3a1dae39c153d4c110f6273ae46fc953bc39e4a57eb50b43fb2eea974efc8fd9d4badd9cf141b7bd95bb50a754199d61332dc65b50e250078

Download Submit
memory/524-63-0x0000000000000000-mapping.dmp

Download
memory/640-65-0x0000000000000000-mapping.dmp

Download
memory/1172-64-0x0000000000000000-mapping.dmp

Download
memory/1208-60-0x0000000000BA0000-0x0000000000BA1000-memory.dmp

Filesize
4KB

Download
memory/1208-62-0x000000001A7D0000-0x000000001A7D2000-memory.dmp

Filesize
8KB

Download
memory/1756-68-0x0000000000000000-mapping.dmp

Download
memory/1756-71-0x0000000000320000-0x0000000000321000-memory.dmp

Filesize
4KB

Download
memory/1756-73-0x000000001B090000-0x000000001B092000-memory.dmp

Filesize
8KB

Download
memory/1896-67-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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