1833ccd4e1eaabab8e62142df4a24963351c3a29eca19ce3455b5ad004d843a7

Analysis

max time kernel
123s
max time network
137s
platform
windows10_x64
resource
win10-en-20210920
submitted
22/09/2021, 08:51

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General

Target
db19fb75cfc8ba8ba9601635594bda08.exe
Size 516KB
Sample210922-kr6d6aefer
SHA256 1833ccd4e1eaabab8e62142df4a24963351c3a29eca19ce3455b5ad004d843a7
MD5 db19fb75cfc8ba8ba9601635594bda08
SHA1 5849f9ed44c91573317a2b5b47f62384fec72b75
SHA512 e1e359dc8cdbc1ccc8aa0dcfb14c8cfdc71eca97150dcc16497460e397c57392dc4ecb1ead775c39df0533c9c39a7c5e46f14f10f9cfd3e4752e3b8cbe609429
MD5 SHA1 SHA512

Score

7^/10

Malware Config

Signatures

Loads dropped DLL 1 IoCs

pid	Process
2284	db19fb75cfc8ba8ba9601635594bda08.exe

Drops desktop.ini file(s) 2 IoCs

description	ioc	Process
File created	C:\Windows\assembly\Desktop.ini	MSBuild.exe
File opened for modification	C:\Windows\assembly\Desktop.ini	MSBuild.exe

Looks up external IP address via web service 3 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
4	checkip.dyndns.org
7	freegeoip.app
8	freegeoip.app

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2284 set thread context of 2492	2284	db19fb75cfc8ba8ba9601635594bda08.exe	70

Drops file in Windows directory 3 IoCs

description	ioc	Process
File opened for modification	C:\Windows\assembly	MSBuild.exe
File created	C:\Windows\assembly\Desktop.ini	MSBuild.exe
File opened for modification	C:\Windows\assembly\Desktop.ini	MSBuild.exe

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 1 IoCs

pid	Process
2492	MSBuild.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2492	MSBuild.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
2284	db19fb75cfc8ba8ba9601635594bda08.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2492	MSBuild.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2492	MSBuild.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 2284 wrote to memory of 2492	2284	db19fb75cfc8ba8ba9601635594bda08.exe	70
PID 2284 wrote to memory of 2492	2284	db19fb75cfc8ba8ba9601635594bda08.exe	70
PID 2284 wrote to memory of 2492	2284	db19fb75cfc8ba8ba9601635594bda08.exe	70
PID 2284 wrote to memory of 2492	2284	db19fb75cfc8ba8ba9601635594bda08.exe	70
PID 2492 wrote to memory of 3480	2492	MSBuild.exe	71
PID 2492 wrote to memory of 3480	2492	MSBuild.exe	71
PID 2492 wrote to memory of 3480	2492	MSBuild.exe	71

C:\Users\Admin\AppData\Local\Temp\db19fb75cfc8ba8ba9601635594bda08.exe
"C:\Users\Admin\AppData\Local\Temp\db19fb75cfc8ba8ba9601635594bda08.exe"
1⤵
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:2284
- C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe
  "C:\Users\Admin\AppData\Local\Temp\db19fb75cfc8ba8ba9601635594bda08.exe"
  2⤵
  - Drops desktop.ini file(s)
  - Drops file in Windows directory
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: GetForegroundWindowSpam
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2492
- - C:\Windows\SysWOW64\netsh.exe
    "netsh" wlan show profile
    3⤵
    PID:3480

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/2492-117-0x00000000027D0000-0x00000000027D1000-memory.dmp

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