asyncrat | e8f6dc455cea42a08feb8fcf5a34928864d537ec5ec905576cee58c9fabd6a5f

General

Target

e8f6dc455cea42a08feb8fcf5a34928864d537ec5ec905576cee58c9fabd6a5f.exe
Size

392KB
MD5

eac2017286abefbd21b28e7f9fcab248
SHA1

02f90ba750bf3801e286ecfbf3467110f8b2ef94
SHA256

e8f6dc455cea42a08feb8fcf5a34928864d537ec5ec905576cee58c9fabd6a5f
SHA512

fa0a14b1bfce0fac1bbb1488f319dd864b9a94e784a6a637907d3bd31dddb80043de71ee582def13e72b9a4c2490c1738fa8d676feb3bc519d26bc75936db48b
SSDEEP

12288:OaoO2yd67Jss86xlfLfC7hgooOK6YQMhUZC9WpVyi:OnV8gooOeQtrl

Score

10^/10

asyncrat default discovery evasion execution rat trojan

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

91.223.3.156:7707

91.223.3.156:8808

Mutex

TcNC0kSWrpnZ

Attributes

delay
3
install
false
install_folder
%AppData%

aes.plain

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
rat asyncrat
Asyncrat family
asyncrat

UAC bypass 3 TTPs 1 IoCs

evasion trojan

Bypass User Account Control

T1548.002

Disable or Modify Tools

T1562.001

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	e8f6dc455cea42a08feb8fcf5a34928864d537ec5ec905576cee58c9fabd6a5f.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
1856	powershell.exe

Checks whether UAC is enabled 1 TTPs 2 IoCs

evasion trojan

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	e8f6dc455cea42a08feb8fcf5a34928864d537ec5ec905576cee58c9fabd6a5f.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	e8f6dc455cea42a08feb8fcf5a34928864d537ec5ec905576cee58c9fabd6a5f.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2972 set thread context of 2068	2972	e8f6dc455cea42a08feb8fcf5a34928864d537ec5ec905576cee58c9fabd6a5f.exe	32

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	installutil.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1856	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1856	powershell.exe
Token: SeDebugPrivilege	2068	installutil.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 2972 wrote to memory of 1856	2972	e8f6dc455cea42a08feb8fcf5a34928864d537ec5ec905576cee58c9fabd6a5f.exe	30
PID 2972 wrote to memory of 1856	2972	e8f6dc455cea42a08feb8fcf5a34928864d537ec5ec905576cee58c9fabd6a5f.exe	30
PID 2972 wrote to memory of 1856	2972	e8f6dc455cea42a08feb8fcf5a34928864d537ec5ec905576cee58c9fabd6a5f.exe	30
PID 2972 wrote to memory of 2068	2972	e8f6dc455cea42a08feb8fcf5a34928864d537ec5ec905576cee58c9fabd6a5f.exe	32
PID 2972 wrote to memory of 2068	2972	e8f6dc455cea42a08feb8fcf5a34928864d537ec5ec905576cee58c9fabd6a5f.exe	32
PID 2972 wrote to memory of 2068	2972	e8f6dc455cea42a08feb8fcf5a34928864d537ec5ec905576cee58c9fabd6a5f.exe	32
PID 2972 wrote to memory of 2068	2972	e8f6dc455cea42a08feb8fcf5a34928864d537ec5ec905576cee58c9fabd6a5f.exe	32
PID 2972 wrote to memory of 2068	2972	e8f6dc455cea42a08feb8fcf5a34928864d537ec5ec905576cee58c9fabd6a5f.exe	32
PID 2972 wrote to memory of 2068	2972	e8f6dc455cea42a08feb8fcf5a34928864d537ec5ec905576cee58c9fabd6a5f.exe	32
PID 2972 wrote to memory of 2068	2972	e8f6dc455cea42a08feb8fcf5a34928864d537ec5ec905576cee58c9fabd6a5f.exe	32
PID 2972 wrote to memory of 2068	2972	e8f6dc455cea42a08feb8fcf5a34928864d537ec5ec905576cee58c9fabd6a5f.exe	32
PID 2972 wrote to memory of 2068	2972	e8f6dc455cea42a08feb8fcf5a34928864d537ec5ec905576cee58c9fabd6a5f.exe	32
PID 2972 wrote to memory of 2068	2972	e8f6dc455cea42a08feb8fcf5a34928864d537ec5ec905576cee58c9fabd6a5f.exe	32
PID 2972 wrote to memory of 2068	2972	e8f6dc455cea42a08feb8fcf5a34928864d537ec5ec905576cee58c9fabd6a5f.exe	32
PID 2972 wrote to memory of 2068	2972	e8f6dc455cea42a08feb8fcf5a34928864d537ec5ec905576cee58c9fabd6a5f.exe	32
PID 2972 wrote to memory of 2768	2972	e8f6dc455cea42a08feb8fcf5a34928864d537ec5ec905576cee58c9fabd6a5f.exe	33
PID 2972 wrote to memory of 2768	2972	e8f6dc455cea42a08feb8fcf5a34928864d537ec5ec905576cee58c9fabd6a5f.exe	33
PID 2972 wrote to memory of 2768	2972	e8f6dc455cea42a08feb8fcf5a34928864d537ec5ec905576cee58c9fabd6a5f.exe	33

System policy modification 1 TTPs 1 IoCs

evasion

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	e8f6dc455cea42a08feb8fcf5a34928864d537ec5ec905576cee58c9fabd6a5f.exe

C:\Users\Admin\AppData\Local\Temp\e8f6dc455cea42a08feb8fcf5a34928864d537ec5ec905576cee58c9fabd6a5f.exe
"C:\Users\Admin\AppData\Local\Temp\e8f6dc455cea42a08feb8fcf5a34928864d537ec5ec905576cee58c9fabd6a5f.exe"
1⤵
- UAC bypass
- Checks whether UAC is enabled
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
- System policy modification
PID:2972
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\e8f6dc455cea42a08feb8fcf5a34928864d537ec5ec905576cee58c9fabd6a5f.exe" -Force
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1856
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  PID:2068
- C:\Windows\system32\WerFault.exe
  C:\Windows\system32\WerFault.exe -u -p 2972 -s 812
  2⤵
  PID:2768

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Persistence

Privilege Escalation

Abuse Elevation Control Mechanism

1

T1548

Bypass User Account Control

1

T1548.002

Defense Evasion

Abuse Elevation Control Mechanism

1

T1548

Bypass User Account Control

1

T1548.002

Impair Defenses

1

T1562

Disable or Modify Tools

Modify Registry

Credential Access

Discovery

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\Cab2C1.tmp

Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

Download Submit
C:\Users\Admin\AppData\Local\Temp\Tar5C87.tmp

Filesize
181KB

MD5
4ea6026cf93ec6338144661bf1202cd1

SHA1
a1dec9044f750ad887935a01430bf49322fbdcb7

SHA256
8efbc21559ef8b1bcf526800d8070baad42474ce7198e26fa771dbb41a76b1d8

SHA512
6c7e0980e39aacf4c3689802353f464a08cd17753bd210ee997e5f2a455deb4f287a9ef74d84579dbde49bc96213cd2b8b247723919c412ea980aa6e6bfe218b

Download Submit
memory/1856-21-0x000000001B700000-0x000000001B9E2000-memory.dmp

Filesize
2.9MB

Download
memory/1856-22-0x0000000000680000-0x0000000000688000-memory.dmp

Filesize
32KB

Download
memory/1856-8-0x0000000002C20000-0x0000000002CA0000-memory.dmp

Filesize
512KB

Download
memory/2068-9-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2068-40-0x0000000006030000-0x00000000060CC000-memory.dmp

Filesize
624KB

Download
memory/2068-18-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2068-17-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2068-11-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2068-62-0x0000000005B70000-0x0000000005BD8000-memory.dmp

Filesize
416KB

Download
memory/2068-20-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2068-19-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2068-15-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2068-13-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2068-60-0x0000000000C00000-0x0000000000C0A000-memory.dmp

Filesize
40KB

Download
memory/2068-59-0x0000000000CF0000-0x0000000000D30000-memory.dmp

Filesize
256KB

Download
memory/2972-3-0x000007FEF5800000-0x000007FEF61EC000-memory.dmp

Filesize
9.9MB

Download
memory/2972-1-0x00000000001A0000-0x0000000000204000-memory.dmp

Filesize
400KB

Download
memory/2972-2-0x0000000001F90000-0x0000000001FF4000-memory.dmp

Filesize
400KB

Download
memory/2972-23-0x000007FEF5800000-0x000007FEF61EC000-memory.dmp

Filesize
9.9MB

Download
memory/2972-0-0x000007FEF5803000-0x000007FEF5804000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads