fb2fd5d1cd31c753b74ea5d3b372cf96e6e4f9c520c31dd2d14ef17bdf965d3f

General

Target
3da3ccb28050e4df36b319775cbe283e.exe
Size 517KB
Sample210922-ggayqabfa5
SHA256 fb2fd5d1cd31c753b74ea5d3b372cf96e6e4f9c520c31dd2d14ef17bdf965d3f
MD5 3da3ccb28050e4df36b319775cbe283e
SHA1 a459ce98c8dcb44f82ea1d7119900e007d00995e
SHA512 a43b24595d143aeadab1d04439d6ec2e7c5a9e6bb424ca4f1a4e78f4809e34d6a2e8eec68150c3668e53d746777173b1d1e2e8b6dedfbceedf35ef21c2bd4302
MD5 SHA1 SHA512

Score

7^/10

Malware Config

Signatures

Loads dropped DLL 1 IoCs

pid	Process
3608	3da3ccb28050e4df36b319775cbe283e.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
6	freegeoip.app
3	checkip.dyndns.org
5	freegeoip.app

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3608 set thread context of 4180	3608	3da3ccb28050e4df36b319775cbe283e.exe	70

Drops file in Windows directory 3 IoCs

description	ioc	Process
File created	C:\Windows\assembly\Desktop.ini	MSBuild.exe
File opened for modification	C:\Windows\assembly\Desktop.ini	MSBuild.exe
File opened for modification	C:\Windows\assembly	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
4180	MSBuild.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
4180	MSBuild.exe

Suspicious behavior: MapViewOfSection 2 IoCs

pid	Process
3608	3da3ccb28050e4df36b319775cbe283e.exe
3608	3da3ccb28050e4df36b319775cbe283e.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4180	MSBuild.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4180	MSBuild.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 3608 wrote to memory of 4180	3608	3da3ccb28050e4df36b319775cbe283e.exe	70
PID 3608 wrote to memory of 4180	3608	3da3ccb28050e4df36b319775cbe283e.exe	70
PID 3608 wrote to memory of 4180	3608	3da3ccb28050e4df36b319775cbe283e.exe	70
PID 3608 wrote to memory of 4180	3608	3da3ccb28050e4df36b319775cbe283e.exe	70
PID 4180 wrote to memory of 2096	4180	MSBuild.exe	71
PID 4180 wrote to memory of 2096	4180	MSBuild.exe	71
PID 4180 wrote to memory of 2096	4180	MSBuild.exe	71

C:\Users\Admin\AppData\Local\Temp\3da3ccb28050e4df36b319775cbe283e.exe
"C:\Users\Admin\AppData\Local\Temp\3da3ccb28050e4df36b319775cbe283e.exe"
1⤵
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:3608
- C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe
  "C:\Users\Admin\AppData\Local\Temp\3da3ccb28050e4df36b319775cbe283e.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:4180
- - C:\Windows\SysWOW64\netsh.exe
    "netsh" wlan show profile
    3⤵
    PID:2096

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/4180-117-0x0000000002300000-0x0000000002301000-memory.dmp

Download

Analysis

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