eacd5ed86a8ddd368a1089c7b97b791258e3eeb89c76c6da829b58d469f654b2

Analysis

max time kernel
119s
max time network
119s
platform
windows7_x64
resource
win7-20240508-en
resource tags

arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
submitted
27-05-2024 18:15

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General

Target

MrsMajor 3.0.7z
Size

234KB
MD5

fedb45ddbd72fc70a81c789763038d81
SHA1

f1ed20c626d0a7ca2808ed768e7d7b319bc4c84a
SHA256

eacd5ed86a8ddd368a1089c7b97b791258e3eeb89c76c6da829b58d469f654b2
SHA512

813c0367f3aeceea9be02ffad4bfa8092ea44b428e68db8f3f33e45e4e5e53599d985fa79a708679b6957cbd04d9b9d67b288137fa71ac5a59e917b8792c8298
SSDEEP

6144:HMMAgnxjSgdHCueEVIzAMAcqXvYEC86TFSQ:HagxjSg1xrIzAMAcuI5TFT

Score

3^/10

Malware Config

Signatures

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

System Information Discovery
T1082

Modifies registry class 2 IoCs

Processes:

rundll32.exerundll32.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-3691908287-3775019229-3534252667-1000_Classes\Local Settings	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3691908287-3775019229-3534252667-1000_Classes\Local Settings	rundll32.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

AcroRd32.exe

pid process

2068 AcroRd32.exe
Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

AcroRd32.exe

pid process

2068 AcroRd32.exe
2068 AcroRd32.exe

pid	process
2068	AcroRd32.exe

pid	process
2068	AcroRd32.exe
2068	AcroRd32.exe

Suspicious use of WriteProcessMemory 10 IoCs

Processes:

cmd.exerundll32.exerundll32.exe

description	pid	process	target process
PID 348 wrote to memory of 2752	348	cmd.exe	rundll32.exe
PID 348 wrote to memory of 2752	348	cmd.exe	rundll32.exe
PID 348 wrote to memory of 2752	348	cmd.exe	rundll32.exe
PID 2752 wrote to memory of 2060	2752	rundll32.exe	rundll32.exe
PID 2752 wrote to memory of 2060	2752	rundll32.exe	rundll32.exe
PID 2752 wrote to memory of 2060	2752	rundll32.exe	rundll32.exe
PID 2060 wrote to memory of 2068	2060	rundll32.exe	AcroRd32.exe
PID 2060 wrote to memory of 2068	2060	rundll32.exe	AcroRd32.exe
PID 2060 wrote to memory of 2068	2060	rundll32.exe	AcroRd32.exe
PID 2060 wrote to memory of 2068	2060	rundll32.exe	AcroRd32.exe

C:\Windows\system32\cmd.exe
cmd /c "C:\Users\Admin\AppData\Local\Temp\MrsMajor 3.0.7z"
1⤵
- Suspicious use of WriteProcessMemory
PID:348

C:\Windows\system32\rundll32.exe
"C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\MrsMajor 3.0.7z
2⤵
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:2752

C:\Windows\system32\rundll32.exe
"C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\MrsMajor 3.0.7z
3⤵
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:2060

C:\Program Files (x86)\Adobe\Reader 9.0\Reader\AcroRd32.exe
"C:\Program Files (x86)\Adobe\Reader 9.0\Reader\AcroRd32.exe" "C:\Users\Admin\AppData\Local\Temp\MrsMajor 3.0.7z"
4⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of SetWindowsHookEx
PID:2068

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\Adobe\Acrobat\9.0\SharedDataEvents
Filesize
3KB

MD5
e77f961ffd2c6534a96e3fda8ef757d1

SHA1
b6e54e9e0f3f0d857229ed7f191d4fe4bafdb87e

SHA256
355d2dc6dada8c6445d4ea6ce291e2f73125db5c7081606edb02d82947417dbd

SHA512
b002a8486026f5f5d7bf75365872be0e0e612a9fd63c8201313fef884cf935594084c28c40170acb469903895e3a6b1c458708558497cd674227e1bf5b597a78

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