asyncrat | 080eff3ceefca287dc59d176676559ae1aa3f1faec807805114bae214a11f586

Analysis

max time kernel
4294192s
max time network
152s
platform
windows7_x64
resource
win7-20220311-en
submitted
29/03/2022, 08:19

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General

Target
PO90381.exe
Size 983KB
Sample220329-j7tvmacha8
SHA256 080eff3ceefca287dc59d176676559ae1aa3f1faec807805114bae214a11f586
MD5 947d1d87caa83fe0eaf0818ce999366d
SHA1 d5cc8db6e945f4b7915d1bd22566886fdc056752
SHA512 e9d0b8e6ea1f06a7c8834e2c7e500353033e4d9b39994a3ab2af326f10bf4170c59c02bb2a866c028851655715d73628bca1ce122640e8425567a12fa2669bdf
MD5 SHA1 SHA512

Score

10^/10

asyncrat default rat spyware stealer

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

104.37.172.204:56777

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/1328-68-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat
behavioral1/memory/1328-69-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat
behavioral1/memory/1328-71-0x000000000040C70E-mapping.dmp	asyncrat
behavioral1/memory/1328-70-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat
behavioral1/memory/1328-73-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat
behavioral1/memory/1328-75-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2028 set thread context of 1328	2028	PO90381.exe	33

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
1664	schtasks.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2028	PO90381.exe
2028	PO90381.exe
1612	powershell.exe
1268	powershell.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	2028	PO90381.exe
Token: SeDebugPrivilege	1612	powershell.exe
Token: SeDebugPrivilege	1268	powershell.exe
Token: SeDebugPrivilege	1328	PO90381.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 2028 wrote to memory of 1268	2028	PO90381.exe	27
PID 2028 wrote to memory of 1268	2028	PO90381.exe	27
PID 2028 wrote to memory of 1268	2028	PO90381.exe	27
PID 2028 wrote to memory of 1268	2028	PO90381.exe	27
PID 2028 wrote to memory of 1612	2028	PO90381.exe	29
PID 2028 wrote to memory of 1612	2028	PO90381.exe	29
PID 2028 wrote to memory of 1612	2028	PO90381.exe	29
PID 2028 wrote to memory of 1612	2028	PO90381.exe	29
PID 2028 wrote to memory of 1664	2028	PO90381.exe	31
PID 2028 wrote to memory of 1664	2028	PO90381.exe	31
PID 2028 wrote to memory of 1664	2028	PO90381.exe	31
PID 2028 wrote to memory of 1664	2028	PO90381.exe	31
PID 2028 wrote to memory of 1328	2028	PO90381.exe	33
PID 2028 wrote to memory of 1328	2028	PO90381.exe	33
PID 2028 wrote to memory of 1328	2028	PO90381.exe	33
PID 2028 wrote to memory of 1328	2028	PO90381.exe	33
PID 2028 wrote to memory of 1328	2028	PO90381.exe	33
PID 2028 wrote to memory of 1328	2028	PO90381.exe	33
PID 2028 wrote to memory of 1328	2028	PO90381.exe	33
PID 2028 wrote to memory of 1328	2028	PO90381.exe	33
PID 2028 wrote to memory of 1328	2028	PO90381.exe	33

C:\Users\Admin\AppData\Local\Temp\PO90381.exe
"C:\Users\Admin\AppData\Local\Temp\PO90381.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2028
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\PO90381.exe"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1268
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\AZaQYtKFFGrYAE.exe"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1612
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\AZaQYtKFFGrYAE" /XML "C:\Users\Admin\AppData\Local\Temp\tmpA296.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:1664
- C:\Users\Admin\AppData\Local\Temp\PO90381.exe
  "C:\Users\Admin\AppData\Local\Temp\PO90381.exe"
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1328

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

Credentials in Files

T1081

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

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Downloads

tmpA296.tmp

Path C:\Users\Admin\AppData\Local\Temp\tmpA296.tmp
Size 1KB
SHA256 d0ff080fa96422b212c85b24e27cb61e4fb2e43699138d22c090fc6aeedf0c1d
MD5 db09985a146870ac5847c156e0fcaac2
SHA1 c286aa310c7da00f8fa903a8df7ed4267ceb3042
SHA512 030f46397da9ebe8a875aa8b52bc088be7e362b83fa4b8cb6d8e25701f0827470d8a01fb3fb16ccf71922b3ecc01ae4ad976cebb9cf7b2c09da5cb83f6cfb1c8
MD5 SHA1 SHA512

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d93f411851d7c929.customDestinations-ms

Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\d93f411851d7c929.customDestinations-ms
Size 7KB
SHA256 36eb08918b149436fa6bffa948e0d98db614db5a895da151bc717afb34ce20f3
MD5 389a8b81f71e89e831b897f9fb88e997
SHA1 7ce0d2d16317b37694698d67cc363a491f908ea9
SHA512 7625a50ebf5fbee4fcd544c3d17b6acc561dbee57c806e15ae2f428ac532b4ab2ceca681a22fa6dbd8f32955c233b390abde87e11bf565076eb8a58213a89b52
MD5 SHA1 SHA512

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memory/1268-78-0x0000000002450000-0x000000000309A000-memory.dmp

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memory/1268-76-0x000000006EDE0000-0x000000006F38B000-memory.dmp

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memory/1268-58-0x0000000075271000-0x0000000075273000-memory.dmp

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memory/1328-66-0x0000000000400000-0x0000000000412000-memory.dmp

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memory/1328-84-0x0000000004F50000-0x0000000004FB0000-memory.dmp

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memory/1328-83-0x00000000057B0000-0x0000000005840000-memory.dmp

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memory/1328-68-0x0000000000400000-0x0000000000412000-memory.dmp

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memory/1328-69-0x0000000000400000-0x0000000000412000-memory.dmp

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memory/1328-82-0x00000000008A0000-0x00000000008AA000-memory.dmp

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memory/1328-70-0x0000000000400000-0x0000000000412000-memory.dmp

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memory/1328-73-0x0000000000400000-0x0000000000412000-memory.dmp

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memory/1328-81-0x0000000004D70000-0x0000000004DEE000-memory.dmp

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memory/1328-65-0x0000000000400000-0x0000000000412000-memory.dmp

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memory/1328-75-0x0000000000400000-0x0000000000412000-memory.dmp

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memory/1612-77-0x000000006EDE0000-0x000000006F38B000-memory.dmp

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memory/1612-79-0x0000000002510000-0x000000000315A000-memory.dmp

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memory/2028-56-0x0000000007F80000-0x000000000805A000-memory.dmp

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memory/2028-55-0x0000000000300000-0x000000000030A000-memory.dmp

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memory/2028-54-0x0000000000FC0000-0x00000000010BE000-memory.dmp

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memory/2028-64-0x0000000000BD0000-0x0000000000BE2000-memory.dmp

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