asyncrat | c2f91a91c984d5e46cbf5285781ffbe64f7e3326f88ffc9b1415bd956859c8c7

Analysis

max time kernel
145s
max time network
151s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
26/01/2023, 12:31

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General

Target
Oxxgg3mhk1oC0ri.exe
Size 771KB
Sample230126-pp2qeade79
SHA256 c2f91a91c984d5e46cbf5285781ffbe64f7e3326f88ffc9b1415bd956859c8c7
MD5 6c03174f161a7bde9817bf7622a753ce
SHA1 4c318c166f1850878ccf8310b962a1b0e8900214
SHA512 0e0410d924adef673ecda9085ed83bb70c83f4170dd5b1950b239be5a75765c7d5129a6d65b01da8af0d7f5c942fbc22eb91352467cc131158065228ad8ab510
SSDEEP 12288:stG7vV5zxPCRgXGHlWMXDpFqIG26bR1M3UmQBkYlUEvG60v4nqU4/Ws:kV3GtbRmDekIrRqVWs
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

198.23.207.34:2023

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/1796-67-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat
behavioral1/memory/1796-69-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat
behavioral1/memory/1796-70-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat
behavioral1/memory/1796-71-0x000000000040C71E-mapping.dmp	asyncrat
behavioral1/memory/1796-73-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat
behavioral1/memory/1796-75-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1076 set thread context of 1796	1076	Oxxgg3mhk1oC0ri.exe	30

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
1464	schtasks.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1596	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1596	powershell.exe
Token: SeDebugPrivilege	1796	RegSvcs.exe
Token: SeDebugPrivilege	1796	RegSvcs.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 1076 wrote to memory of 1596	1076	Oxxgg3mhk1oC0ri.exe	26
PID 1076 wrote to memory of 1596	1076	Oxxgg3mhk1oC0ri.exe	26
PID 1076 wrote to memory of 1596	1076	Oxxgg3mhk1oC0ri.exe	26
PID 1076 wrote to memory of 1596	1076	Oxxgg3mhk1oC0ri.exe	26
PID 1076 wrote to memory of 1464	1076	Oxxgg3mhk1oC0ri.exe	28
PID 1076 wrote to memory of 1464	1076	Oxxgg3mhk1oC0ri.exe	28
PID 1076 wrote to memory of 1464	1076	Oxxgg3mhk1oC0ri.exe	28
PID 1076 wrote to memory of 1464	1076	Oxxgg3mhk1oC0ri.exe	28
PID 1076 wrote to memory of 1796	1076	Oxxgg3mhk1oC0ri.exe	30
PID 1076 wrote to memory of 1796	1076	Oxxgg3mhk1oC0ri.exe	30
PID 1076 wrote to memory of 1796	1076	Oxxgg3mhk1oC0ri.exe	30
PID 1076 wrote to memory of 1796	1076	Oxxgg3mhk1oC0ri.exe	30
PID 1076 wrote to memory of 1796	1076	Oxxgg3mhk1oC0ri.exe	30
PID 1076 wrote to memory of 1796	1076	Oxxgg3mhk1oC0ri.exe	30
PID 1076 wrote to memory of 1796	1076	Oxxgg3mhk1oC0ri.exe	30
PID 1076 wrote to memory of 1796	1076	Oxxgg3mhk1oC0ri.exe	30
PID 1076 wrote to memory of 1796	1076	Oxxgg3mhk1oC0ri.exe	30
PID 1076 wrote to memory of 1796	1076	Oxxgg3mhk1oC0ri.exe	30
PID 1076 wrote to memory of 1796	1076	Oxxgg3mhk1oC0ri.exe	30
PID 1076 wrote to memory of 1796	1076	Oxxgg3mhk1oC0ri.exe	30

C:\Users\Admin\AppData\Local\Temp\Oxxgg3mhk1oC0ri.exe
"C:\Users\Admin\AppData\Local\Temp\Oxxgg3mhk1oC0ri.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1076
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\ykjOLBW.exe"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1596
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\ykjOLBW" /XML "C:\Users\Admin\AppData\Local\Temp\tmpE560.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:1464
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe"
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1796

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

Replay Monitor

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Downloads

tmpE560.tmp

Path C:\Users\Admin\AppData\Local\Temp\tmpE560.tmp
Size 1KB
SHA256 8c0f31814a15cf3649a2781066e9edc90c5e6d4e81f39685a444ad0872ca02af
MD5 830ca8d94e1c76f3a88d11b72c0af796
SHA1 a8100528322b6529da0027ab95026038707dbe5d
SHA512 1158fb4cf16d86c8d2b6bca34f1281caaf89e402408d57b65308af1da20cbc90d6e01e978c2e28ef4e5d25a3f8cd1cbaa929c0f39fff0eb62c2b923d9cb30bd3
MD5 SHA1 SHA512

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memory/1076-63-0x0000000004420000-0x0000000004434000-memory.dmp

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memory/1076-57-0x0000000000500000-0x000000000050A000-memory.dmp

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memory/1076-58-0x0000000000B50000-0x0000000000BA0000-memory.dmp

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memory/1076-55-0x0000000076681000-0x0000000076683000-memory.dmp

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memory/1076-54-0x0000000000EF0000-0x0000000000FB6000-memory.dmp

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memory/1076-56-0x0000000000310000-0x0000000000320000-memory.dmp

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memory/1596-76-0x000000006F090000-0x000000006F63B000-memory.dmp

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memory/1596-77-0x000000006F090000-0x000000006F63B000-memory.dmp

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memory/1796-67-0x0000000000400000-0x0000000000412000-memory.dmp

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memory/1796-69-0x0000000000400000-0x0000000000412000-memory.dmp

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memory/1796-70-0x0000000000400000-0x0000000000412000-memory.dmp

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memory/1796-73-0x0000000000400000-0x0000000000412000-memory.dmp

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memory/1796-75-0x0000000000400000-0x0000000000412000-memory.dmp

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memory/1796-65-0x0000000000400000-0x0000000000412000-memory.dmp

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memory/1796-64-0x0000000000400000-0x0000000000412000-memory.dmp

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