asyncrat | 02cb8f411c6ae91fb1f59202d25096bd4e523569cb0d9332f97253ea9518dce0

General

Target

Shellbag anylizer.exe
Size

237KB
MD5

d450127ec998b5e2b630e160d2f7fd37
SHA1

601cb671b90b78470801910d06aa8a1eceb61100
SHA256

02cb8f411c6ae91fb1f59202d25096bd4e523569cb0d9332f97253ea9518dce0
SHA512

fc9fe9b0e04469d48ca27718bf167c96fa659cd059126f0a34a7fba7200cf6f75a38ad0bc6c364c517c9cf02a511c0c47c3e3de02fae9f92def10100b1fb388f
SSDEEP

6144:cJLb1wF9kfK8rpClz0KBb6o589GHWHWujiSPbQ:cJ/gBuj/Ps

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Botnet

Default

Attributes

delay
1
install
true
install_file
update.exe
install_folder
%AppData%
pastebin_config
https://pastebin.com/raw/m5mgzzdQ

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

resource	yara_rule
behavioral1/files/0x00080000000120f4-15.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
2880	update.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 3 IoCs

Web Service

T1102

flow	ioc
4	pastebin.com
5	pastebin.com
6	7.tcp.eu.ngrok.io

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

System Information Discovery
T1082

Delays execution with timeout.exe 2 IoCs

evasion

pid	Process
2860	timeout.exe
2140	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
2120	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2556	Shellbag anylizer.exe
2556	Shellbag anylizer.exe
2556	Shellbag anylizer.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	2556	Shellbag anylizer.exe
Token: SeDebugPrivilege	2556	Shellbag anylizer.exe
Token: SeDebugPrivilege	2880	update.exe
Token: SeDebugPrivilege	2880	update.exe

Suspicious use of WriteProcessMemory 27 IoCs

description	pid	Process	procid_target
PID 2556 wrote to memory of 2444	2556	Shellbag anylizer.exe	30
PID 2556 wrote to memory of 2444	2556	Shellbag anylizer.exe	30
PID 2556 wrote to memory of 2444	2556	Shellbag anylizer.exe	30
PID 2556 wrote to memory of 2212	2556	Shellbag anylizer.exe	32
PID 2556 wrote to memory of 2212	2556	Shellbag anylizer.exe	32
PID 2556 wrote to memory of 2212	2556	Shellbag anylizer.exe	32
PID 2444 wrote to memory of 2120	2444	cmd.exe	34
PID 2444 wrote to memory of 2120	2444	cmd.exe	34
PID 2444 wrote to memory of 2120	2444	cmd.exe	34
PID 2212 wrote to memory of 2860	2212	cmd.exe	35
PID 2212 wrote to memory of 2860	2212	cmd.exe	35
PID 2212 wrote to memory of 2860	2212	cmd.exe	35
PID 2212 wrote to memory of 2880	2212	cmd.exe	36
PID 2212 wrote to memory of 2880	2212	cmd.exe	36
PID 2212 wrote to memory of 2880	2212	cmd.exe	36
PID 2880 wrote to memory of 2152	2880	update.exe	39
PID 2880 wrote to memory of 2152	2880	update.exe	39
PID 2880 wrote to memory of 2152	2880	update.exe	39
PID 2152 wrote to memory of 1140	2152	cmd.exe	41
PID 2152 wrote to memory of 1140	2152	cmd.exe	41
PID 2152 wrote to memory of 1140	2152	cmd.exe	41
PID 2880 wrote to memory of 536	2880	update.exe	42
PID 2880 wrote to memory of 536	2880	update.exe	42
PID 2880 wrote to memory of 536	2880	update.exe	42
PID 536 wrote to memory of 2140	536	cmd.exe	44
PID 536 wrote to memory of 2140	536	cmd.exe	44
PID 536 wrote to memory of 2140	536	cmd.exe	44

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\Shellbag anylizer.exe
"C:\Users\Admin\AppData\Local\Temp\Shellbag anylizer.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2556
- 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:2444
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "update" /tr '"C:\Users\Admin\AppData\Roaming\update.exe"'
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2120
- C:\Windows\system32\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp900F.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2212
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:2860
- - C:\Users\Admin\AppData\Roaming\update.exe
    "C:\Users\Admin\AppData\Roaming\update.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:2880
  - - C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /delete /f /tn "update"
      4⤵
      Suspicious use of WriteProcessMemory
      PID:2152
    - - C:\Windows\system32\schtasks.exe
        
        schtasks /delete /f /tn "update"
        5⤵
        
        PID:1140
  - - C:\Windows\system32\cmd.exe
      cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp8EFF.tmp.bat""
      4⤵
      Suspicious use of WriteProcessMemory
      PID:536
    - - C:\Windows\system32\timeout.exe
        
        timeout 3
        5⤵
        Delays execution with timeout.exe
        
        PID:2140

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

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\CabAFD1.tmp

Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

Download Submit
C:\Users\Admin\AppData\Local\Temp\Tar8E40.tmp

Filesize
181KB

MD5
4ea6026cf93ec6338144661bf1202cd1

SHA1
a1dec9044f750ad887935a01430bf49322fbdcb7

SHA256
8efbc21559ef8b1bcf526800d8070baad42474ce7198e26fa771dbb41a76b1d8

SHA512
6c7e0980e39aacf4c3689802353f464a08cd17753bd210ee997e5f2a455deb4f287a9ef74d84579dbde49bc96213cd2b8b247723919c412ea980aa6e6bfe218b

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp8EFF.tmp.bat

Filesize
155B

MD5
87d7372c7d17ce26a57f7c8bc07bd5b3

SHA1
c386c53c9488e3a81f925ef7914571c3052d9d21

SHA256
465588178ed73d9f52ce8374a4f6fc2794425a5154b51ac3767889bbe6896848

SHA512
586225302fd1e80c33a3e9fd3ef49731fc3e68b409d4d5e0ed36448e8a02758d13899cfd16d5098380a0230d692d6a4590d35e32fa3b29456f05365fb2ebf0a8

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp900F.tmp.bat

Filesize
150B

MD5
31573155ace9467cdc1671e41eb25080

SHA1
ac60e65a71fc045259a9f9973605c8124a2de2e6

SHA256
7865c40fd9f058618e299f3f6dcbe18a8ff70bfddac3e6bf7efeedc69f4f99f8

SHA512
0a6042fb88000c5ab29376ba842b3bfa2522586d85344779791ed98e99b8b26fcaa9dc897bac78b82cf6466ae0cde6ec05263e12891971d2ddc702cb35383131

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

Filesize
237KB

MD5
d450127ec998b5e2b630e160d2f7fd37

SHA1
601cb671b90b78470801910d06aa8a1eceb61100

SHA256
02cb8f411c6ae91fb1f59202d25096bd4e523569cb0d9332f97253ea9518dce0

SHA512
fc9fe9b0e04469d48ca27718bf167c96fa659cd059126f0a34a7fba7200cf6f75a38ad0bc6c364c517c9cf02a511c0c47c3e3de02fae9f92def10100b1fb388f

Download Submit
memory/2556-0-0x000007FEF54E3000-0x000007FEF54E4000-memory.dmp

Filesize
4KB

Download
memory/2556-1-0x0000000000D10000-0x0000000000D52000-memory.dmp

Filesize
264KB

Download
memory/2556-2-0x000007FEF54E0000-0x000007FEF5ECC000-memory.dmp

Filesize
9.9MB

Download
memory/2556-3-0x000007FEF54E0000-0x000007FEF5ECC000-memory.dmp

Filesize
9.9MB

Download
memory/2556-12-0x000007FEF54E0000-0x000007FEF5ECC000-memory.dmp

Filesize
9.9MB

Download
memory/2880-17-0x00000000003D0000-0x0000000000412000-memory.dmp

Filesize
264KB

Download
memory/2880-35-0x000000001AA30000-0x000000001AAE2000-memory.dmp

Filesize
712KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads