a6c11f14de0f3b87910785f97ae9618adda0d3b4a7616395d2b741c70881dc51

Analysis

max time kernel
1793s
max time network
1457s
platform
windows11-21h2_x64
resource
win11-20240426-en
resource tags

arch:x64arch:x86image:win11-20240426-enlocale:en-usos:windows11-21h2-x64system
submitted
21-05-2024 15:53

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General

Target

CraxsRat 7.4/res/Lib/7z.exe
Size

1.0MB
MD5

c90af375bc40d0506c16b4ed75efccb6
SHA1

cd29f79b128ba67bc30e44e7a0365c5ffd3be376
SHA256

c6e3aa8b8b76b9e3b9df71b3f31d1b7a23f2a031099aceb68c39f38945b65dc0
SHA512

f0f9e9f6d92ebf20a5303be38e41f66fd052141f04db14ad1d30c974a4e4e70abd51340fe92658563bdb6a7587d9117883241de5bdd123a6e259123869dbabaa
SSDEEP

24576:xnsJ39LyjbJkQFMhmC+6GD9P377SqLk2JC5RzHl:xnsHyjtk2MYC5GDR77k2OHl

Score

7^/10

persistence

Malware Config

Signatures

Executes dropped EXE 3 IoCs

Processes:

._cache_7z.exeSynaptics.exe._cache_Synaptics.exe

pid process

240 ._cache_7z.exe
3812 Synaptics.exe
3796 ._cache_Synaptics.exe

pid	process
240	._cache_7z.exe
3812	Synaptics.exe
3796	._cache_Synaptics.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

7z.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\????? = "C:\\ProgramData\\Synaptics\\Synaptics.exe"	7z.exe

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

System Information Discovery
T1082

Checks processor information in registry 2 TTPs 3 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

Processes:

EXCEL.EXE

description	ioc	process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	EXCEL.EXE

Enumerates system info in registry 2 TTPs 3 IoCs

Query Registry

T1012

System Information Discovery

T1082

Processes:

EXCEL.EXE

description	ioc	process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	EXCEL.EXE

Modifies registry class 2 IoCs

Processes:

7z.exeSynaptics.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\	7z.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\	Synaptics.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

1036 EXCEL.EXE
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

._cache_Synaptics.exe

description pid process

Token: SeRestorePrivilege 3796 ._cache_Synaptics.exe
Token: 35 3796 ._cache_Synaptics.exe
Suspicious use of SetWindowsHookEx 6 IoCs

Processes:

EXCEL.EXE

pid process

1036 EXCEL.EXE
1036 EXCEL.EXE
1036 EXCEL.EXE
1036 EXCEL.EXE
1036 EXCEL.EXE
1036 EXCEL.EXE

pid	process
1036	EXCEL.EXE

description	pid	process
Token: SeRestorePrivilege	3796	._cache_Synaptics.exe
Token: 35	3796	._cache_Synaptics.exe

pid	process
1036	EXCEL.EXE
1036	EXCEL.EXE
1036	EXCEL.EXE
1036	EXCEL.EXE
1036	EXCEL.EXE
1036	EXCEL.EXE

Suspicious use of WriteProcessMemory 9 IoCs

Processes:

7z.exeSynaptics.exe

description	pid	process	target process
PID 1408 wrote to memory of 240	1408	7z.exe	._cache_7z.exe
PID 1408 wrote to memory of 240	1408	7z.exe	._cache_7z.exe
PID 1408 wrote to memory of 240	1408	7z.exe	._cache_7z.exe
PID 1408 wrote to memory of 3812	1408	7z.exe	Synaptics.exe
PID 1408 wrote to memory of 3812	1408	7z.exe	Synaptics.exe
PID 1408 wrote to memory of 3812	1408	7z.exe	Synaptics.exe
PID 3812 wrote to memory of 3796	3812	Synaptics.exe	._cache_Synaptics.exe
PID 3812 wrote to memory of 3796	3812	Synaptics.exe	._cache_Synaptics.exe
PID 3812 wrote to memory of 3796	3812	Synaptics.exe	._cache_Synaptics.exe

C:\Users\Admin\AppData\Local\Temp\CraxsRat 7.4\res\Lib\7z.exe
"C:\Users\Admin\AppData\Local\Temp\CraxsRat 7.4\res\Lib\7z.exe"
1⤵
- Adds Run key to start application
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:1408
- C:\Users\Admin\AppData\Local\Temp\CraxsRat 7.4\res\Lib\._cache_7z.exe
  "C:\Users\Admin\AppData\Local\Temp\CraxsRat 7.4\res\Lib\._cache_7z.exe"
  2⤵
  - Executes dropped EXE
  PID:240
- C:\ProgramData\Synaptics\Synaptics.exe
  "C:\ProgramData\Synaptics\Synaptics.exe" InjUpdate
  2⤵
  - Executes dropped EXE
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:3812
- - C:\Users\Admin\AppData\Local\Temp\CraxsRat 7.4\res\Lib\._cache_Synaptics.exe
    "C:\Users\Admin\AppData\Local\Temp\CraxsRat 7.4\res\Lib\._cache_Synaptics.exe" InjUpdate
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:3796

C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE
"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" /automation -Embedding
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
PID:1036

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:\ProgramData\Synaptics\Synaptics.exe

Filesize
1.0MB

MD5
c90af375bc40d0506c16b4ed75efccb6

SHA1
cd29f79b128ba67bc30e44e7a0365c5ffd3be376

SHA256
c6e3aa8b8b76b9e3b9df71b3f31d1b7a23f2a031099aceb68c39f38945b65dc0

SHA512
f0f9e9f6d92ebf20a5303be38e41f66fd052141f04db14ad1d30c974a4e4e70abd51340fe92658563bdb6a7587d9117883241de5bdd123a6e259123869dbabaa

Download Submit
C:\Users\Admin\AppData\Local\Temp\5l8rTscv.xlsm

Filesize
17KB

MD5
e566fc53051035e1e6fd0ed1823de0f9

SHA1
00bc96c48b98676ecd67e81a6f1d7754e4156044

SHA256
8e574b4ae6502230c0829e2319a6c146aebd51b7008bf5bbfb731424d7952c15

SHA512
a12f56ff30ea35381c2b8f8af2446cf1daa21ee872e98cad4b863db060acd4c33c5760918c277dadb7a490cb4ca2f925d59c70dc5171e16601a11bc4a6542b04

Download Submit
C:\Users\Admin\AppData\Local\Temp\CraxsRat 7.4\res\Lib\._cache_7z.exe

Filesize
329KB

MD5
453821572a13cc6ea0736f9db6424e13

SHA1
5f994bde8db4b658781756eaaca9416909a3a420

SHA256
b8c3871a5d6a473a2e9d08684a481aea7467a97d0a433cf55b127323ef61218f

SHA512
22468064ae306037d2b241e8a985ad5b037b45f6873e364f46d8066018533993e66834288227ae86e94e23511386f0afcf52776060b17dad11dfba4bc333b07a

Download Submit
memory/1036-191-0x00007FFC1F1D0000-0x00007FFC1F1E0000-memory.dmp

Filesize
64KB

Download
memory/1036-188-0x00007FFC1F1D0000-0x00007FFC1F1E0000-memory.dmp

Filesize
64KB

Download
memory/1036-190-0x00007FFC1F1D0000-0x00007FFC1F1E0000-memory.dmp

Filesize
64KB

Download
memory/1036-189-0x00007FFC1F1D0000-0x00007FFC1F1E0000-memory.dmp

Filesize
64KB

Download
memory/1036-192-0x00007FFC1F1D0000-0x00007FFC1F1E0000-memory.dmp

Filesize
64KB

Download
memory/1036-193-0x00007FFC1CDF0000-0x00007FFC1CE00000-memory.dmp

Filesize
64KB

Download
memory/1036-194-0x00007FFC1CDF0000-0x00007FFC1CE00000-memory.dmp

Filesize
64KB

Download
memory/1408-0-0x0000000002480000-0x0000000002481000-memory.dmp

Filesize
4KB

Download
memory/1408-127-0x0000000000400000-0x0000000000513000-memory.dmp

Filesize
1.1MB

Download
memory/3812-128-0x00000000007D0000-0x00000000007D1000-memory.dmp

Filesize
4KB

Download
memory/3812-206-0x0000000000400000-0x0000000000513000-memory.dmp

Filesize
1.1MB

Download
memory/3812-208-0x00000000007D0000-0x00000000007D1000-memory.dmp

Filesize
4KB

Download
memory/3812-235-0x0000000000400000-0x0000000000513000-memory.dmp

Filesize
1.1MB

Download