asyncrat | f206813414d2040a855ca9074033777f3dfd2d4f1664e60c40df1963c8c972f8

Analysis

max time kernel
230s
max time network
272s
platform
windows7_x64
resource
win7-20221111-en
resource tags

arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
submitted
25/11/2022, 10:08

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General

Target

f206813414d2040a855ca9074033777f3dfd2d4f1664e60c40df1963c8c972f8.exe
Size

734KB
MD5

240a0e2f9ffa3e9e789ceb35a585ee14
SHA1

e5d27dd1e90b4622f97bcfd72c81217f22157b3c
SHA256

f206813414d2040a855ca9074033777f3dfd2d4f1664e60c40df1963c8c972f8
SHA512

179173f3264af7b0eb68783691313aab3867fd4b4b19c051ecac31bb9aff9f6d98970ee18022f4e614bfaba32e1816663becb2239ecff1894e3808eae2cfb0f5
SSDEEP

12288:5JD1+j2dKPX6Tub7lQLvvfqeo9DlzlPtST2bubBoBzLJZ7:5FTd0wub7avBulX9bCgLJZ

Score

10^/10

asyncrat default persistence rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

45.145.22.142:6606

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/1636-74-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat
behavioral1/memory/1636-75-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat
behavioral1/memory/1636-77-0x000000000040C70E-mapping.dmp	asyncrat
behavioral1/memory/1636-76-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat
behavioral1/memory/1636-80-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat
behavioral1/memory/1636-82-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat

Executes dropped EXE 2 IoCs

pid	Process
1240	WindowsUpdate.exe
1636	InstallUtil.exe

Loads dropped DLL 2 IoCs

pid	Process
1212	f206813414d2040a855ca9074033777f3dfd2d4f1664e60c40df1963c8c972f8.exe
1240	WindowsUpdate.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-1214520366-621468234-4062160515-1000\Software\Microsoft\Windows\CurrentVersion\Run	reg.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1214520366-621468234-4062160515-1000\Software\Microsoft\Windows\CurrentVersion\Run\WindowsUpdate = "C:\\Users\\Admin\\Desktop\\WindowsUpdate.exe"	reg.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1240 set thread context of 1636	1240	WindowsUpdate.exe	33

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
1212	f206813414d2040a855ca9074033777f3dfd2d4f1664e60c40df1963c8c972f8.exe
1212	f206813414d2040a855ca9074033777f3dfd2d4f1664e60c40df1963c8c972f8.exe
1212	f206813414d2040a855ca9074033777f3dfd2d4f1664e60c40df1963c8c972f8.exe
1240	WindowsUpdate.exe
1240	WindowsUpdate.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1212	f206813414d2040a855ca9074033777f3dfd2d4f1664e60c40df1963c8c972f8.exe
Token: SeDebugPrivilege	1240	WindowsUpdate.exe

Suspicious use of WriteProcessMemory 27 IoCs

description	pid	Process	procid_target
PID 1212 wrote to memory of 1068	1212	f206813414d2040a855ca9074033777f3dfd2d4f1664e60c40df1963c8c972f8.exe	28
PID 1212 wrote to memory of 1068	1212	f206813414d2040a855ca9074033777f3dfd2d4f1664e60c40df1963c8c972f8.exe	28
PID 1212 wrote to memory of 1068	1212	f206813414d2040a855ca9074033777f3dfd2d4f1664e60c40df1963c8c972f8.exe	28
PID 1212 wrote to memory of 1068	1212	f206813414d2040a855ca9074033777f3dfd2d4f1664e60c40df1963c8c972f8.exe	28
PID 1068 wrote to memory of 924	1068	cmd.exe	30
PID 1068 wrote to memory of 924	1068	cmd.exe	30
PID 1068 wrote to memory of 924	1068	cmd.exe	30
PID 1068 wrote to memory of 924	1068	cmd.exe	30
PID 1212 wrote to memory of 1240	1212	f206813414d2040a855ca9074033777f3dfd2d4f1664e60c40df1963c8c972f8.exe	32
PID 1212 wrote to memory of 1240	1212	f206813414d2040a855ca9074033777f3dfd2d4f1664e60c40df1963c8c972f8.exe	32
PID 1212 wrote to memory of 1240	1212	f206813414d2040a855ca9074033777f3dfd2d4f1664e60c40df1963c8c972f8.exe	32
PID 1212 wrote to memory of 1240	1212	f206813414d2040a855ca9074033777f3dfd2d4f1664e60c40df1963c8c972f8.exe	32
PID 1212 wrote to memory of 1240	1212	f206813414d2040a855ca9074033777f3dfd2d4f1664e60c40df1963c8c972f8.exe	32
PID 1212 wrote to memory of 1240	1212	f206813414d2040a855ca9074033777f3dfd2d4f1664e60c40df1963c8c972f8.exe	32
PID 1212 wrote to memory of 1240	1212	f206813414d2040a855ca9074033777f3dfd2d4f1664e60c40df1963c8c972f8.exe	32
PID 1240 wrote to memory of 1636	1240	WindowsUpdate.exe	33
PID 1240 wrote to memory of 1636	1240	WindowsUpdate.exe	33
PID 1240 wrote to memory of 1636	1240	WindowsUpdate.exe	33
PID 1240 wrote to memory of 1636	1240	WindowsUpdate.exe	33
PID 1240 wrote to memory of 1636	1240	WindowsUpdate.exe	33
PID 1240 wrote to memory of 1636	1240	WindowsUpdate.exe	33
PID 1240 wrote to memory of 1636	1240	WindowsUpdate.exe	33
PID 1240 wrote to memory of 1636	1240	WindowsUpdate.exe	33
PID 1240 wrote to memory of 1636	1240	WindowsUpdate.exe	33
PID 1240 wrote to memory of 1636	1240	WindowsUpdate.exe	33
PID 1240 wrote to memory of 1636	1240	WindowsUpdate.exe	33
PID 1240 wrote to memory of 1636	1240	WindowsUpdate.exe	33

C:\Users\Admin\AppData\Local\Temp\f206813414d2040a855ca9074033777f3dfd2d4f1664e60c40df1963c8c972f8.exe
"C:\Users\Admin\AppData\Local\Temp\f206813414d2040a855ca9074033777f3dfd2d4f1664e60c40df1963c8c972f8.exe"
1⤵
- Loads dropped DLL
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1212
- C:\Windows\SysWOW64\cmd.exe
  "cmd.exe" /c REG ADD "HKCU\Software\Microsoft\Windows\CurrentVersion\Run" /f /v "WindowsUpdate" /t REG_SZ /d "C:\Users\Admin\Desktop\WindowsUpdate.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1068
- - C:\Windows\SysWOW64\reg.exe
    REG ADD "HKCU\Software\Microsoft\Windows\CurrentVersion\Run" /f /v "WindowsUpdate" /t REG_SZ /d "C:\Users\Admin\Desktop\WindowsUpdate.exe"
    3⤵
    - Adds Run key to start application
    PID:924
- C:\Users\Admin\Desktop\WindowsUpdate.exe
  "C:\Users\Admin\Desktop\WindowsUpdate.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1240
- - C:\Users\Admin\AppData\Local\Temp\InstallUtil.exe
    "C:\Users\Admin\AppData\Local\Temp\InstallUtil.exe"
    3⤵
    - Executes dropped EXE
    PID:1636

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\InstallUtil.exe

Filesize
40KB

MD5
91c9ae9c9a17a9db5e08b120e668c74c

SHA1
50770954c1ceb0bb6f1d5d3f2de2a0a065773723

SHA256
e56a7e5d3ab9675555e2897fc3faa2dd9265008a4967a7d54030ab8184d2d38f

SHA512
ca504af192e3318359d4742a2ef26ae1b5d040a4f9942782e02549a310158d5d5dbf919b4c748c31ee609d2046bd23ee0c22712891c86ae4a1e3a58c6e67647e

Download Submit
C:\Users\Admin\AppData\Local\Temp\InstallUtil.exe

Filesize
40KB

MD5
91c9ae9c9a17a9db5e08b120e668c74c

SHA1
50770954c1ceb0bb6f1d5d3f2de2a0a065773723

SHA256
e56a7e5d3ab9675555e2897fc3faa2dd9265008a4967a7d54030ab8184d2d38f

SHA512
ca504af192e3318359d4742a2ef26ae1b5d040a4f9942782e02549a310158d5d5dbf919b4c748c31ee609d2046bd23ee0c22712891c86ae4a1e3a58c6e67647e

Download Submit
C:\Users\Admin\Desktop\WindowsUpdate.exe

Filesize
734KB

MD5
240a0e2f9ffa3e9e789ceb35a585ee14

SHA1
e5d27dd1e90b4622f97bcfd72c81217f22157b3c

SHA256
f206813414d2040a855ca9074033777f3dfd2d4f1664e60c40df1963c8c972f8

SHA512
179173f3264af7b0eb68783691313aab3867fd4b4b19c051ecac31bb9aff9f6d98970ee18022f4e614bfaba32e1816663becb2239ecff1894e3808eae2cfb0f5

Download Submit
C:\Users\Admin\Desktop\WindowsUpdate.exe

Filesize
734KB

MD5
240a0e2f9ffa3e9e789ceb35a585ee14

SHA1
e5d27dd1e90b4622f97bcfd72c81217f22157b3c

SHA256
f206813414d2040a855ca9074033777f3dfd2d4f1664e60c40df1963c8c972f8

SHA512
179173f3264af7b0eb68783691313aab3867fd4b4b19c051ecac31bb9aff9f6d98970ee18022f4e614bfaba32e1816663becb2239ecff1894e3808eae2cfb0f5

Download Submit
\Users\Admin\AppData\Local\Temp\InstallUtil.exe

Filesize
40KB

MD5
91c9ae9c9a17a9db5e08b120e668c74c

SHA1
50770954c1ceb0bb6f1d5d3f2de2a0a065773723

SHA256
e56a7e5d3ab9675555e2897fc3faa2dd9265008a4967a7d54030ab8184d2d38f

SHA512
ca504af192e3318359d4742a2ef26ae1b5d040a4f9942782e02549a310158d5d5dbf919b4c748c31ee609d2046bd23ee0c22712891c86ae4a1e3a58c6e67647e

Download Submit
\Users\Admin\Desktop\WindowsUpdate.exe

Filesize
734KB

MD5
240a0e2f9ffa3e9e789ceb35a585ee14

SHA1
e5d27dd1e90b4622f97bcfd72c81217f22157b3c

SHA256
f206813414d2040a855ca9074033777f3dfd2d4f1664e60c40df1963c8c972f8

SHA512
179173f3264af7b0eb68783691313aab3867fd4b4b19c051ecac31bb9aff9f6d98970ee18022f4e614bfaba32e1816663becb2239ecff1894e3808eae2cfb0f5

Download Submit
memory/1212-54-0x0000000000AF0000-0x0000000000BAC000-memory.dmp

Filesize
752KB

Download
memory/1212-55-0x0000000074ED1000-0x0000000074ED3000-memory.dmp

Filesize
8KB

Download
memory/1212-56-0x0000000000560000-0x0000000000586000-memory.dmp

Filesize
152KB

Download
memory/1212-57-0x0000000000780000-0x0000000000786000-memory.dmp

Filesize
24KB

Download
memory/1240-67-0x0000000000B90000-0x0000000000BA4000-memory.dmp

Filesize
80KB

Download
memory/1240-68-0x0000000000DC0000-0x0000000000DC6000-memory.dmp

Filesize
24KB

Download
memory/1240-66-0x00000000004D0000-0x00000000004F6000-memory.dmp

Filesize
152KB

Download
memory/1240-64-0x0000000001100000-0x00000000011BC000-memory.dmp

Filesize
752KB

Download
memory/1636-71-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/1636-72-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/1636-74-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/1636-75-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/1636-76-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/1636-80-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/1636-82-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download