781019a5dfd8c9476b08d2aaf31c17d85bffabd0a5c7dd6f3e4c4a648781cd21

Analysis

max time kernel
142s
max time network
156s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
13/02/2024, 16:42

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General

Target

99a31aace0027a649baf6c52816b3d50.exe
Size

8KB
MD5

99a31aace0027a649baf6c52816b3d50
SHA1

b7a7493eead690d0055cc5307e0d35b412503be3
SHA256

781019a5dfd8c9476b08d2aaf31c17d85bffabd0a5c7dd6f3e4c4a648781cd21
SHA512

2317231e3d67af71a2ccf1c7fb811879c37bc7522f981060dab30ed7b3bec2cc966497d61908c53e881b5b9983a9a04a5b097b739cefa38c0be5df3ae23c1e01
SSDEEP

96:MprSKzrjGjqljAhDjN7D5FCJ0krsLjOKWLUU2BwozpHtFAbiLwgkxFftXjrKfDxH:INDQXDQki+zRnIbXKfDxQCzbvB

Score

7^/10

persistence

Malware Config

Signatures

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-635608581-3370340891-292606865-1000\Control Panel\International\Geo\Nation	99a31aace0027a649baf6c52816b3d50.exe

Executes dropped EXE 1 IoCs

pid	Process
2296	winudll.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-635608581-3370340891-292606865-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\winudll.exe = "C:\\Windows\\system32\\winudll.exe"	winudll.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-635608581-3370340891-292606865-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\winudll.exe = "C:\\Windows\\system32\\winudll.exe"	99a31aace0027a649baf6c52816b3d50.exe

Drops file in System32 directory 4 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\winudll.exe	99a31aace0027a649baf6c52816b3d50.exe
File created	C:\Windows\SysWOW64\winudll.exe	99a31aace0027a649baf6c52816b3d50.exe
File opened for modification	C:\Windows\SysWOW64\winudll.exe	winudll.exe
File created	C:\Windows\SysWOW64\winudll.exe	winudll.exe

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

System Information Discovery
T1082

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4700	99a31aace0027a649baf6c52816b3d50.exe
Token: SeDebugPrivilege	2296	winudll.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4700 wrote to memory of 2296	4700	99a31aace0027a649baf6c52816b3d50.exe	86
PID 4700 wrote to memory of 2296	4700	99a31aace0027a649baf6c52816b3d50.exe	86
PID 4700 wrote to memory of 2296	4700	99a31aace0027a649baf6c52816b3d50.exe	86

C:\Users\Admin\AppData\Local\Temp\99a31aace0027a649baf6c52816b3d50.exe
"C:\Users\Admin\AppData\Local\Temp\99a31aace0027a649baf6c52816b3d50.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4700
- C:\Windows\SysWOW64\winudll.exe
  "C:\Windows\system32\winudll.exe"
  2⤵
  - Executes dropped EXE
  - Adds Run key to start application
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  PID:2296

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\SysWOW64\winudll.exe

Filesize
8KB

MD5
99a31aace0027a649baf6c52816b3d50

SHA1
b7a7493eead690d0055cc5307e0d35b412503be3

SHA256
781019a5dfd8c9476b08d2aaf31c17d85bffabd0a5c7dd6f3e4c4a648781cd21

SHA512
2317231e3d67af71a2ccf1c7fb811879c37bc7522f981060dab30ed7b3bec2cc966497d61908c53e881b5b9983a9a04a5b097b739cefa38c0be5df3ae23c1e01

Download Submit
memory/2296-11-0x0000000000400000-0x0000000000405000-memory.dmp

Filesize
20KB

Download
memory/4700-0-0x0000000000400000-0x0000000000405000-memory.dmp

Filesize
20KB

Download
memory/4700-10-0x0000000000400000-0x0000000000405000-memory.dmp

Filesize
20KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads