44ab2ce8d7000ba457b5c7f4f63c9f807d3c3a5ed4f3ed6b298aba606095cd7b

Analysis

max time kernel
148s
max time network
157s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
15/04/2024, 20:30

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General

Target

2024-04-15_20d8054dfbf8a6e5d3835ec9778f97d6_cryptolocker.exe
Size

41KB
MD5

20d8054dfbf8a6e5d3835ec9778f97d6
SHA1

641852cef77f7b5959ec64238627b2fe08c12aba
SHA256

44ab2ce8d7000ba457b5c7f4f63c9f807d3c3a5ed4f3ed6b298aba606095cd7b
SHA512

3d4594611a451c5a8fb7fe9af817e9ee07f7d45b62ed1319de2579f945e613e01949dfff72f56ec360e2585a401004dc4bc6f9b2980c3ad554f2ba4ed88590f9
SSDEEP

768:TS5nQJ24LR7tOOtEvwDpjGqPhqlcnvhx5/xFRY+iy4:m5nkFNMOtEvwDpjG8hhXy+iy4

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4764-0-0x0000000000500000-0x000000000050E000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0008000000023272-13.dat	CryptoLocker_rule2
behavioral2/memory/4764-19-0x0000000000500000-0x000000000050E000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2760-26-0x0000000000500000-0x000000000050E000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 2 IoCs

resource	yara_rule
behavioral2/memory/4764-19-0x0000000000500000-0x000000000050E000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2760-26-0x0000000000500000-0x000000000050E000-memory.dmp	CryptoLocker_set1

Detects executables built or packed with MPress PE compressor 4 IoCs

resource	yara_rule
behavioral2/memory/4764-0-0x0000000000500000-0x000000000050E000-memory.dmp	INDICATOR_EXE_Packed_MPress
behavioral2/files/0x0008000000023272-13.dat	INDICATOR_EXE_Packed_MPress
behavioral2/memory/4764-19-0x0000000000500000-0x000000000050E000-memory.dmp	INDICATOR_EXE_Packed_MPress
behavioral2/memory/2760-26-0x0000000000500000-0x000000000050E000-memory.dmp	INDICATOR_EXE_Packed_MPress

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-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	2024-04-15_20d8054dfbf8a6e5d3835ec9778f97d6_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2760	misid.exe

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

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4764 wrote to memory of 2760	4764	2024-04-15_20d8054dfbf8a6e5d3835ec9778f97d6_cryptolocker.exe	91
PID 4764 wrote to memory of 2760	4764	2024-04-15_20d8054dfbf8a6e5d3835ec9778f97d6_cryptolocker.exe	91
PID 4764 wrote to memory of 2760	4764	2024-04-15_20d8054dfbf8a6e5d3835ec9778f97d6_cryptolocker.exe	91

C:\Users\Admin\AppData\Local\Temp\2024-04-15_20d8054dfbf8a6e5d3835ec9778f97d6_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-15_20d8054dfbf8a6e5d3835ec9778f97d6_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4764
- C:\Users\Admin\AppData\Local\Temp\misid.exe
  "C:\Users\Admin\AppData\Local\Temp\misid.exe"
  2⤵
  - Executes dropped EXE
  PID:2760

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=4472 --field-trial-handle=2656,i,16940681401824032220,151921362336696246,262144 --variations-seed-version /prefetch:8
1⤵
PID:864

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

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\Temp\misid.exe

Filesize
41KB

MD5
12394b231f21b4aa7f0e4de73ca8cc5c

SHA1
9b40157c970cd54105a3b2d89a09456b891a6e2f

SHA256
d3c83e4bc07a3030dedb6f70ee79c6b485073013e66e2c533d6b2ff75512c269

SHA512
970da6e421868d516dd3c2a0afcdb66d3f75ae232bacf502d00c2f033864196cc27fd2348831bf239afebab7846d2230061c141d105fff3d377e83728ae792c2

Download Submit
memory/2760-20-0x0000000002140000-0x0000000002146000-memory.dmp

Filesize
24KB

Download
memory/2760-18-0x0000000002060000-0x0000000002066000-memory.dmp

Filesize
24KB

Download
memory/2760-26-0x0000000000500000-0x000000000050E000-memory.dmp

Filesize
56KB

Download
memory/4764-0-0x0000000000500000-0x000000000050E000-memory.dmp

Filesize
56KB

Download
memory/4764-1-0x00000000006F0000-0x00000000006F6000-memory.dmp

Filesize
24KB

Download
memory/4764-2-0x00000000006F0000-0x00000000006F6000-memory.dmp

Filesize
24KB

Download
memory/4764-3-0x00000000021C0000-0x00000000021C6000-memory.dmp

Filesize
24KB

Download
memory/4764-19-0x0000000000500000-0x000000000050E000-memory.dmp

Filesize
56KB

Download