d8dc17c4b3642e45151c21b7e02f12cda99c8c5ee51549a6f271c3ea1b436c3d

General

Target
1941b425080aeb2d67a5f87c416c78dc.exe
Size 115KB
Sample201007-pml89pcbre
SHA256 d8dc17c4b3642e45151c21b7e02f12cda99c8c5ee51549a6f271c3ea1b436c3d
MD5 1941b425080aeb2d67a5f87c416c78dc
SHA1 a0b909220f3add2a12ab3fa8da8f18a5710ea632
SHA512 ca83951f3d818be9dc9cc26310406c8bc013bf30ab347e2d77b0f76193857e42bcd9014ae6bf7741367ac121b8f3631dd9f7451170d89388ed08cea8800445bd
MD5 SHA1 SHA512

Score

10^/10

Modifies WinLogon for persistence 2 TTPs 1 IoCs

Winlogon Helper DLL

Modify Registry

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2066881839-3229799743-3576549721-1000\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\shell = "explorer.exe,\"C:\\Users\\Admin\\AppData\\Local\\Temp\\1941b425080aeb2d67a5f87c416c78dc.exe\""	1941b425080aeb2d67a5f87c416c78dc.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\1941b425080aeb2d67a5f87c416c78dc.exe	1941b425080aeb2d67a5f87c416c78dc.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\1941b425080aeb2d67a5f87c416c78dc.exe	1941b425080aeb2d67a5f87c416c78dc.exe

Reads user/profile data of local email clients 2 TTPs
Email clients store some user data on disk where infostealers will often target it.
spyware

Data from Local System
T1005

Credentials in Files
T1081
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware

Data from Local System
T1005

Credentials in Files
T1081

Adds Run key to start application 2 TTPs 2 IoCs

Registry Run Keys / Startup Folder

Modify Registry

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2066881839-3229799743-3576549721-1000\Software\Microsoft\Windows\CurrentVersion\Run\<Unknown> = "C:\\Users\\Admin\\AppData\\Local\\Temp\\1941b425080aeb2d67a5f87c416c78dc.exe"	1941b425080aeb2d67a5f87c416c78dc.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2066881839-3229799743-3576549721-1000\Software\Microsoft\Windows\CurrentVersion\Run\1941b425080aeb2d67a5f87c416c78dc.exe = "C:\\Users\\Admin\\AppData\\Local\\Temp\\1941b425080aeb2d67a5f87c416c78dc.exe"	1941b425080aeb2d67a5f87c416c78dc.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs

Web Service
T1102

Looks up external IP address via web service 2 IoCs

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

flow	ioc
9	api.ipify.org
10	api.ipify.org

Suspicious use of NtSetInformationThreadHideFromDebugger 12 IoCs

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3104 set thread context of 1600	3104	1941b425080aeb2d67a5f87c416c78dc.exe	77

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
552	timeout.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3104	1941b425080aeb2d67a5f87c416c78dc.exe
Token: SeDebugPrivilege	1600	1941b425080aeb2d67a5f87c416c78dc.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1600	1941b425080aeb2d67a5f87c416c78dc.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 3104 wrote to memory of 552	3104	1941b425080aeb2d67a5f87c416c78dc.exe	73
PID 3104 wrote to memory of 552	3104	1941b425080aeb2d67a5f87c416c78dc.exe	73
PID 3104 wrote to memory of 552	3104	1941b425080aeb2d67a5f87c416c78dc.exe	73
PID 3104 wrote to memory of 1600	3104	1941b425080aeb2d67a5f87c416c78dc.exe	77
PID 3104 wrote to memory of 1600	3104	1941b425080aeb2d67a5f87c416c78dc.exe	77
PID 3104 wrote to memory of 1600	3104	1941b425080aeb2d67a5f87c416c78dc.exe	77
PID 3104 wrote to memory of 1600	3104	1941b425080aeb2d67a5f87c416c78dc.exe	77
PID 3104 wrote to memory of 1600	3104	1941b425080aeb2d67a5f87c416c78dc.exe	77
PID 3104 wrote to memory of 1600	3104	1941b425080aeb2d67a5f87c416c78dc.exe	77
PID 3104 wrote to memory of 1600	3104	1941b425080aeb2d67a5f87c416c78dc.exe	77
PID 3104 wrote to memory of 1600	3104	1941b425080aeb2d67a5f87c416c78dc.exe	77

C:\Users\Admin\AppData\Local\Temp\1941b425080aeb2d67a5f87c416c78dc.exe
"C:\Users\Admin\AppData\Local\Temp\1941b425080aeb2d67a5f87c416c78dc.exe"
1⤵
- Modifies WinLogon for persistence
- Drops startup file
- Adds Run key to start application
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3104
- C:\Windows\SysWOW64\timeout.exe
  timeout 4
  2⤵
  - Delays execution with timeout.exe
  PID:552
- C:\Users\Admin\AppData\Local\Temp\1941b425080aeb2d67a5f87c416c78dc.exe
  "C:\Users\Admin\AppData\Local\Temp\1941b425080aeb2d67a5f87c416c78dc.exe"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  PID:1600