4e71c0eb909b58239ff9a12e3abbed336c126e61ffb24e052ad68b4b6863ee01

Analysis

max time kernel
150s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20231127-en
resource tags

arch:x64arch:x86image:win10v2004-20231127-enlocale:en-usos:windows10-2004-x64system
submitted
12/12/2023, 11:59

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General

Target

4e71c0eb909b58239ff9a12e3abbed336c126e61ffb24e052ad68b4b6863ee01.exe
Size

2.4MB
MD5

59f79fe64de3c9562ea00c7e41f65d85
SHA1

f93f2bec00acde7beb74bd02ff74a164ce7c7b9e
SHA256

4e71c0eb909b58239ff9a12e3abbed336c126e61ffb24e052ad68b4b6863ee01
SHA512

c562e59b5e953b05b21cb95b57f7364834ed155ad12a52dc10faf2da2e69f851c2425b05fb547de4e6098cb6655ff741025c989627b482d22e9127ac52d83100
SSDEEP

49152:mrX4ppAYG3aZCwHUA1k3XKL73AxUCQLRWqJ8BaXKL73AxUCQLRWqJ8B:mT4ppAY/Ck+qL73x7sqJIDL73x7sqJI

Score

7^/10

persistence

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
4788	csrss1.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\name = "C:\\Users\\Admin\\AppData\\Local\\Temp\\csrss1.exe"	csrss1.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4788 set thread context of 1796	4788	csrss1.exe	96

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1456	4992	WerFault.exe	98

Checks processor information in registry 2 TTPs 2 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	ctfmon.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	ctfmon.exe

Modifies data under HKEY_USERS 3 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\.DEFAULT\Keyboard Layout\Toggle	ctfmon.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Run	ctfmon.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\CTF\DirectSwitchHotkeys\	ctfmon.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
4788	csrss1.exe
4788	csrss1.exe
4788	csrss1.exe
4788	csrss1.exe
4788	csrss1.exe
4788	csrss1.exe
4788	csrss1.exe
4788	csrss1.exe
4788	csrss1.exe
4788	csrss1.exe
4788	csrss1.exe
4788	csrss1.exe
4788	csrss1.exe
4788	csrss1.exe
4788	csrss1.exe
4788	csrss1.exe
4788	csrss1.exe
4788	csrss1.exe
4788	csrss1.exe
4788	csrss1.exe
4788	csrss1.exe
4788	csrss1.exe
4788	csrss1.exe
4788	csrss1.exe
4788	csrss1.exe
4788	csrss1.exe
4788	csrss1.exe
4788	csrss1.exe
4788	csrss1.exe
4788	csrss1.exe
4788	csrss1.exe
4788	csrss1.exe
4788	csrss1.exe
4788	csrss1.exe
4788	csrss1.exe
4788	csrss1.exe
4788	csrss1.exe
4788	csrss1.exe
4788	csrss1.exe
4788	csrss1.exe
4788	csrss1.exe
4788	csrss1.exe
4788	csrss1.exe
4788	csrss1.exe
4788	csrss1.exe
4788	csrss1.exe
4788	csrss1.exe
4788	csrss1.exe
4788	csrss1.exe
4788	csrss1.exe
4788	csrss1.exe
4788	csrss1.exe
4788	csrss1.exe
4788	csrss1.exe
4788	csrss1.exe
4788	csrss1.exe
4788	csrss1.exe
4788	csrss1.exe
4788	csrss1.exe
4788	csrss1.exe
4788	csrss1.exe
4788	csrss1.exe
4788	csrss1.exe
4788	csrss1.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	4788	csrss1.exe
Token: SeDebugPrivilege	4788	csrss1.exe
Token: SeManageVolumePrivilege	2756	svchost.exe

Suspicious use of SetWindowsHookEx 4 IoCs

pid	Process
3172	4e71c0eb909b58239ff9a12e3abbed336c126e61ffb24e052ad68b4b6863ee01.exe
3172	4e71c0eb909b58239ff9a12e3abbed336c126e61ffb24e052ad68b4b6863ee01.exe
4788	csrss1.exe
4788	csrss1.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 3172 wrote to memory of 4788	3172	4e71c0eb909b58239ff9a12e3abbed336c126e61ffb24e052ad68b4b6863ee01.exe	86
PID 3172 wrote to memory of 4788	3172	4e71c0eb909b58239ff9a12e3abbed336c126e61ffb24e052ad68b4b6863ee01.exe	86
PID 3172 wrote to memory of 4788	3172	4e71c0eb909b58239ff9a12e3abbed336c126e61ffb24e052ad68b4b6863ee01.exe	86
PID 4788 wrote to memory of 1796	4788	csrss1.exe	96
PID 4788 wrote to memory of 1796	4788	csrss1.exe	96
PID 4788 wrote to memory of 1796	4788	csrss1.exe	96
PID 4788 wrote to memory of 1796	4788	csrss1.exe	96
PID 4788 wrote to memory of 1796	4788	csrss1.exe	96
PID 4788 wrote to memory of 1796	4788	csrss1.exe	96
PID 4788 wrote to memory of 1796	4788	csrss1.exe	96
PID 4788 wrote to memory of 1796	4788	csrss1.exe	96
PID 4788 wrote to memory of 1796	4788	csrss1.exe	96

C:\Users\Admin\AppData\Local\Temp\4e71c0eb909b58239ff9a12e3abbed336c126e61ffb24e052ad68b4b6863ee01.exe
"C:\Users\Admin\AppData\Local\Temp\4e71c0eb909b58239ff9a12e3abbed336c126e61ffb24e052ad68b4b6863ee01.exe"
1⤵
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3172
- C:\Users\Admin\AppData\Local\Temp\csrss1.exe
  C:\Users\Admin\AppData\Local\Temp\csrss1.exe
  2⤵
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4788
- - C:\Windows\SysWOW64\ctfmon.exe
    ctfmon.exe
    3⤵
    - Checks processor information in registry
    PID:1796

C:\Windows\SysWOW64\ctfmon.exe
C:\Windows\SysWOW64\ctfmon.exe
1⤵
- Modifies data under HKEY_USERS
PID:4992
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4992 -s 760
  2⤵
  - Program crash
  PID:1456

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 4992 -ip 4992
1⤵
PID:4476

C:\Windows\system32\rundll32.exe
"C:\Windows\system32\rundll32.exe" "C:\Windows\SYSTEM32\EDGEHTML.dll",#141 Microsoft.VCLibs.140.00_8wekyb3d8bbwe
1⤵
PID:2040

C:\Windows\System32\svchost.exe
C:\Windows\System32\svchost.exe -k UnistackSvcGroup
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2756

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

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Comms\UnistoreDB\store.jfm

Filesize
16KB

MD5
429b6684526538b3c06f7d9c542a020e

SHA1
4d0c1fe78b6b023eec55d18d30b3c3a287138128

SHA256
007a7815bde982ac0f87bf842f444310955fcc7273798dc7329a75b5ad598ee7

SHA512
a83a6228a457fc14ea3c9c9617ecad634be046b5a52a5a40f39e276e48e43630a698f895c103b64a5e4eb20e0b01e61125c0b52a42723de1961767a086dc1ee2

Download Submit
C:\Users\Admin\AppData\Local\Temp\csrss1.exe

Filesize
375KB

MD5
1a6e00d9a2de724b77dd0c386cf0e08a

SHA1
b2523f9ed765c850525e5414f8fb79e1e9fab444

SHA256
5bb683bf31a54e202b6f06d3120a3664cf666e54da2d6388beb003ccc1277eaa

SHA512
6fc43f2e1ec89c4911117e3a5d003fb30ffb3776afad1c4e9c8c268923fab123a802a3929247f9bcc75b916087d0427db85ab1ace098a666ebb4a9347d697d9d

Download Submit
memory/1796-12-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download
memory/1796-16-0x0000000010000000-0x000000001000F000-memory.dmp

Filesize
60KB

Download
memory/1796-15-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download
memory/1796-13-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download
memory/1796-10-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download
memory/1796-11-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download
memory/2756-55-0x00000245C8FD0000-0x00000245C8FD1000-memory.dmp

Filesize
4KB

Download
memory/2756-60-0x00000245C8FD0000-0x00000245C8FD1000-memory.dmp

Filesize
4KB

Download
memory/2756-90-0x00000245C8E40000-0x00000245C8E41000-memory.dmp

Filesize
4KB

Download
memory/2756-89-0x00000245C8D30000-0x00000245C8D31000-memory.dmp

Filesize
4KB

Download
memory/2756-88-0x00000245C8D30000-0x00000245C8D31000-memory.dmp

Filesize
4KB

Download
memory/2756-86-0x00000245C8D20000-0x00000245C8D21000-memory.dmp

Filesize
4KB

Download
memory/2756-74-0x00000245C8B20000-0x00000245C8B21000-memory.dmp

Filesize
4KB

Download
memory/2756-22-0x00000245C08B0000-0x00000245C08C0000-memory.dmp

Filesize
64KB

Download
memory/2756-38-0x00000245C09B0000-0x00000245C09C0000-memory.dmp

Filesize
64KB

Download
memory/2756-54-0x00000245C8FA0000-0x00000245C8FA1000-memory.dmp

Filesize
4KB

Download
memory/2756-71-0x00000245C8BE0000-0x00000245C8BE1000-memory.dmp

Filesize
4KB

Download
memory/2756-56-0x00000245C8FD0000-0x00000245C8FD1000-memory.dmp

Filesize
4KB

Download
memory/2756-57-0x00000245C8FD0000-0x00000245C8FD1000-memory.dmp

Filesize
4KB

Download
memory/2756-58-0x00000245C8FD0000-0x00000245C8FD1000-memory.dmp

Filesize
4KB

Download
memory/2756-59-0x00000245C8FD0000-0x00000245C8FD1000-memory.dmp

Filesize
4KB

Download
memory/2756-68-0x00000245C8BF0000-0x00000245C8BF1000-memory.dmp

Filesize
4KB

Download
memory/2756-61-0x00000245C8FD0000-0x00000245C8FD1000-memory.dmp

Filesize
4KB

Download
memory/2756-62-0x00000245C8FD0000-0x00000245C8FD1000-memory.dmp

Filesize
4KB

Download
memory/2756-63-0x00000245C8FD0000-0x00000245C8FD1000-memory.dmp

Filesize
4KB

Download
memory/2756-64-0x00000245C8FD0000-0x00000245C8FD1000-memory.dmp

Filesize
4KB

Download
memory/2756-65-0x00000245C8BF0000-0x00000245C8BF1000-memory.dmp

Filesize
4KB

Download
memory/2756-66-0x00000245C8BE0000-0x00000245C8BE1000-memory.dmp

Filesize
4KB

Download
memory/3172-0-0x0000000000400000-0x00000000005C7000-memory.dmp

Filesize
1.8MB

Download
memory/3172-19-0x0000000000400000-0x00000000005C7000-memory.dmp

Filesize
1.8MB

Download
memory/4788-9-0x0000000000400000-0x0000000000595000-memory.dmp

Filesize
1.6MB

Download
memory/4788-21-0x00000000005F0000-0x00000000005F1000-memory.dmp

Filesize
4KB

Download
memory/4788-7-0x0000000000400000-0x0000000000595000-memory.dmp

Filesize
1.6MB

Download
memory/4788-20-0x0000000000400000-0x0000000000595000-memory.dmp

Filesize
1.6MB

Download
memory/4788-6-0x00000000005F0000-0x00000000005F1000-memory.dmp

Filesize
4KB

Download
memory/4788-5-0x0000000000400000-0x0000000000595000-memory.dmp

Filesize
1.6MB

Download