asyncrat | 5bfb66d35d5f423d65fc751d8a37bddc94f7103eb963ba83c505254f139f6452

Analysis

max time kernel
148s
max time network
154s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
26/08/2022, 12:11

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General

Target
PURCHASE ORDER_97876.pdf.exe
Size 770KB
Sample220826-pcltesdce6
SHA256 5bfb66d35d5f423d65fc751d8a37bddc94f7103eb963ba83c505254f139f6452
MD5 300f4c489b7dd73ab15d467b3dde67b6
SHA1 384ce22482b1592727ea6bf7d1004e6c9a3a3b23
SHA512 66724be874736be6b7aed45a040513c1049f19c68a56731656dacfe7a393516b7befcf406eb72cbce48907f673dd6b57b360169f880485c3081084792945e707
SSDEEP 12288:e5JTyBCrnwHSHe+IYPMLdt6jOR233wL7n3Q9uytgWxMD186+tfOHMDcc5I:eL7rnatiXwL89uyyB26iWsDcWI
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

91.192.100.9:8976

Mutex

AsyncMutex_6SI8OkPnk

Attributes

delay
3
install
false
install_folder
%AppData%

aes.plain

Signatures

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

Async RAT payload 6 IoCs

rat

resource	yara_rule
behavioral1/memory/1768-68-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat
behavioral1/memory/1768-69-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat
behavioral1/memory/1768-70-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat
behavioral1/memory/1768-71-0x000000000040D03E-mapping.dmp	asyncrat
behavioral1/memory/1768-73-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat
behavioral1/memory/1768-75-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1100 set thread context of 1768	1100	PURCHASE ORDER_97876.pdf.exe	31

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

pid	Process
1756	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1100	PURCHASE ORDER_97876.pdf.exe
1100	PURCHASE ORDER_97876.pdf.exe
1188	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1100	PURCHASE ORDER_97876.pdf.exe
Token: SeDebugPrivilege	1188	powershell.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 1100 wrote to memory of 1188	1100	PURCHASE ORDER_97876.pdf.exe	27
PID 1100 wrote to memory of 1188	1100	PURCHASE ORDER_97876.pdf.exe	27
PID 1100 wrote to memory of 1188	1100	PURCHASE ORDER_97876.pdf.exe	27
PID 1100 wrote to memory of 1188	1100	PURCHASE ORDER_97876.pdf.exe	27
PID 1100 wrote to memory of 1756	1100	PURCHASE ORDER_97876.pdf.exe	29
PID 1100 wrote to memory of 1756	1100	PURCHASE ORDER_97876.pdf.exe	29
PID 1100 wrote to memory of 1756	1100	PURCHASE ORDER_97876.pdf.exe	29
PID 1100 wrote to memory of 1756	1100	PURCHASE ORDER_97876.pdf.exe	29
PID 1100 wrote to memory of 1768	1100	PURCHASE ORDER_97876.pdf.exe	31
PID 1100 wrote to memory of 1768	1100	PURCHASE ORDER_97876.pdf.exe	31
PID 1100 wrote to memory of 1768	1100	PURCHASE ORDER_97876.pdf.exe	31
PID 1100 wrote to memory of 1768	1100	PURCHASE ORDER_97876.pdf.exe	31
PID 1100 wrote to memory of 1768	1100	PURCHASE ORDER_97876.pdf.exe	31
PID 1100 wrote to memory of 1768	1100	PURCHASE ORDER_97876.pdf.exe	31
PID 1100 wrote to memory of 1768	1100	PURCHASE ORDER_97876.pdf.exe	31
PID 1100 wrote to memory of 1768	1100	PURCHASE ORDER_97876.pdf.exe	31
PID 1100 wrote to memory of 1768	1100	PURCHASE ORDER_97876.pdf.exe	31
PID 1100 wrote to memory of 1768	1100	PURCHASE ORDER_97876.pdf.exe	31
PID 1100 wrote to memory of 1768	1100	PURCHASE ORDER_97876.pdf.exe	31
PID 1100 wrote to memory of 1768	1100	PURCHASE ORDER_97876.pdf.exe	31

C:\Users\Admin\AppData\Local\Temp\PURCHASE ORDER_97876.pdf.exe
"C:\Users\Admin\AppData\Local\Temp\PURCHASE ORDER_97876.pdf.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1100
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\DgLYgESVqo.exe"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1188
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\DgLYgESVqo" /XML "C:\Users\Admin\AppData\Local\Temp\tmpBA1C.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:1756
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe"
  2⤵
  PID:1768

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

tmpBA1C.tmp

Path C:\Users\Admin\AppData\Local\Temp\tmpBA1C.tmp
Size 1KB
SHA256 b2ad232e81c1574910fe97cad8827879a5794010138ece148ca6f3c7db692127
MD5 c61ee2e1a6721f665fcfcbcd327335ac
SHA1 0842fe80c63bee157444c303c41d80b83019b150
SHA512 a1b0b1c9260f44c773b0329f17da170cf35e59e699e336b2ba4712147eaf7fda0ba68a48d4457dfd15bdfbd2370024ca307390884c54b300100b92556b29c314
MD5 SHA1 SHA512

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memory/1100-55-0x0000000075441000-0x0000000075443000-memory.dmp

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memory/1100-56-0x00000000007B0000-0x00000000007D2000-memory.dmp

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memory/1100-57-0x00000000007D0000-0x00000000007DC000-memory.dmp

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memory/1100-58-0x0000000005DF0000-0x0000000005E5E000-memory.dmp

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memory/1100-63-0x0000000004860000-0x0000000004866000-memory.dmp

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memory/1100-64-0x00000000048B0000-0x00000000048D0000-memory.dmp

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memory/1100-54-0x0000000000900000-0x00000000009C6000-memory.dmp

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memory/1188-76-0x000000006E980000-0x000000006EF2B000-memory.dmp

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memory/1188-77-0x000000006E980000-0x000000006EF2B000-memory.dmp

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memory/1768-66-0x0000000000400000-0x0000000000412000-memory.dmp

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memory/1768-69-0x0000000000400000-0x0000000000412000-memory.dmp

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memory/1768-70-0x0000000000400000-0x0000000000412000-memory.dmp

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memory/1768-73-0x0000000000400000-0x0000000000412000-memory.dmp

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memory/1768-75-0x0000000000400000-0x0000000000412000-memory.dmp

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memory/1768-68-0x0000000000400000-0x0000000000412000-memory.dmp

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memory/1768-65-0x0000000000400000-0x0000000000412000-memory.dmp

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