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

1260 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

1340 schtasks.exe
Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

3000 timeout.exe

pid	process
1260	update.exe

pid	process
1340	schtasks.exe

pid	process
3000	timeout.exe

Suspicious behavior: EnumeratesProcesses 13 IoCs

Processes:

26597663fcdb8fc32e2076bd5834889a.exe

pid	process
2840	26597663fcdb8fc32e2076bd5834889a.exe
2840	26597663fcdb8fc32e2076bd5834889a.exe
2840	26597663fcdb8fc32e2076bd5834889a.exe
2840	26597663fcdb8fc32e2076bd5834889a.exe
2840	26597663fcdb8fc32e2076bd5834889a.exe
2840	26597663fcdb8fc32e2076bd5834889a.exe
2840	26597663fcdb8fc32e2076bd5834889a.exe
2840	26597663fcdb8fc32e2076bd5834889a.exe
2840	26597663fcdb8fc32e2076bd5834889a.exe
2840	26597663fcdb8fc32e2076bd5834889a.exe
2840	26597663fcdb8fc32e2076bd5834889a.exe
2840	26597663fcdb8fc32e2076bd5834889a.exe
2840	26597663fcdb8fc32e2076bd5834889a.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

26597663fcdb8fc32e2076bd5834889a.exeupdate.exe

description pid process

Token: SeDebugPrivilege 2840 26597663fcdb8fc32e2076bd5834889a.exe
Token: SeDebugPrivilege 1260 update.exe

description	pid	process
Token: SeDebugPrivilege	2840	26597663fcdb8fc32e2076bd5834889a.exe
Token: SeDebugPrivilege	1260	update.exe

Suspicious use of WriteProcessMemory 10 IoCs

Processes:

26597663fcdb8fc32e2076bd5834889a.execmd.execmd.exe

description	pid	process	target process
PID 2840 wrote to memory of 3672	2840	26597663fcdb8fc32e2076bd5834889a.exe	cmd.exe
PID 2840 wrote to memory of 3672	2840	26597663fcdb8fc32e2076bd5834889a.exe	cmd.exe
PID 2840 wrote to memory of 1332	2840	26597663fcdb8fc32e2076bd5834889a.exe	cmd.exe
PID 2840 wrote to memory of 1332	2840	26597663fcdb8fc32e2076bd5834889a.exe	cmd.exe
PID 1332 wrote to memory of 3000	1332	cmd.exe	timeout.exe
PID 1332 wrote to memory of 3000	1332	cmd.exe	timeout.exe
PID 3672 wrote to memory of 1340	3672	cmd.exe	schtasks.exe
PID 3672 wrote to memory of 1340	3672	cmd.exe	schtasks.exe
PID 1332 wrote to memory of 1260	1332	cmd.exe	update.exe
PID 1332 wrote to memory of 1260	1332	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:2840
- 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:3672
- - 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:1340
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp9B9A.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1332
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:3000
- - C:\Users\Admin\AppData\Roaming\update.exe
    "C:\Users\Admin\AppData\Roaming\update.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:1260

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\tmp9B9A.tmp.bat

MD5
211fdd7a3518784cb890a046a1019b4e

SHA1
23d00812aa4ff4c5f638d0f808c0ef27b4be842d

SHA256
00f3d18ecb1f7dd5c1fd381c51b8643852a605d8556e456213d6bcf64c5fd717

SHA512
60aacd413d1ac8b962c61265cd5a42587d8a3c059d841f3f2b08a16d22cbbd59b7cb33f2b6eb71385f7961fe98b897f79f71cc493af86e46f0ce44dd05e9b449

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/1260-122-0x0000000000000000-mapping.dmp

Download
memory/1260-127-0x000000001B0A0000-0x000000001B0A2000-memory.dmp

Filesize
8KB

Download
memory/1332-118-0x0000000000000000-mapping.dmp

Download
memory/1340-121-0x0000000000000000-mapping.dmp

Download
memory/2840-114-0x0000000000A30000-0x0000000000A31000-memory.dmp

Filesize
4KB

Download
memory/2840-116-0x000000001B710000-0x000000001B712000-memory.dmp

Filesize
8KB

Download
memory/3000-120-0x0000000000000000-mapping.dmp

Download
memory/3672-117-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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