b8e1ebae9107d6a61463bfcdea73d1e170c1f103e264d649c6b650069d0b012d

Analysis

max time kernel
155s
max time network
158s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
08/03/2024, 22:33

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General

Target

2024-03-08_d4737842b8edb15cee27265294ff3d4f_cryptolocker.exe
Size

100KB
MD5

d4737842b8edb15cee27265294ff3d4f
SHA1

419dfc0345bf27c3fac149071c65db043c5c9e38
SHA256

b8e1ebae9107d6a61463bfcdea73d1e170c1f103e264d649c6b650069d0b012d
SHA512

3c307c1efa26a4e4174371d50adc5e6360571d5a873ecae698b78c40a2e8e1bc6bcba3b16b3fb027b19dac5c09ea975aa2daa1b344bb11e0323a3d6ee68bc3fe
SSDEEP

768:XS5nQJ24LR1bytOOtEvwDpjNbZ7uyA36S7MpxRiWjzUNlYi:i5nkFGMOtEvwDpjNbwQEIikgNlYi

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3380-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000700000002326d-13.dat	CryptoLocker_rule2
behavioral2/memory/3380-20-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3516-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 2 IoCs

resource	yara_rule
behavioral2/memory/3380-20-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3516-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

Detects executables built or packed with MPress PE compressor 4 IoCs

resource	yara_rule
behavioral2/memory/3380-0-0x0000000000500000-0x000000000050F000-memory.dmp	INDICATOR_EXE_Packed_MPress
behavioral2/files/0x000700000002326d-13.dat	INDICATOR_EXE_Packed_MPress
behavioral2/memory/3380-20-0x0000000000500000-0x000000000050F000-memory.dmp	INDICATOR_EXE_Packed_MPress
behavioral2/memory/3516-26-0x0000000000500000-0x000000000050F000-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	2024-03-08_d4737842b8edb15cee27265294ff3d4f_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3516	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 3380 wrote to memory of 3516	3380	2024-03-08_d4737842b8edb15cee27265294ff3d4f_cryptolocker.exe	98
PID 3380 wrote to memory of 3516	3380	2024-03-08_d4737842b8edb15cee27265294ff3d4f_cryptolocker.exe	98
PID 3380 wrote to memory of 3516	3380	2024-03-08_d4737842b8edb15cee27265294ff3d4f_cryptolocker.exe	98

C:\Users\Admin\AppData\Local\Temp\2024-03-08_d4737842b8edb15cee27265294ff3d4f_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-08_d4737842b8edb15cee27265294ff3d4f_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3380
- C:\Users\Admin\AppData\Local\Temp\misid.exe
  "C:\Users\Admin\AppData\Local\Temp\misid.exe"
  2⤵
  - Executes dropped EXE
  PID:3516

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=5164 --field-trial-handle=3084,i,4016110471176367543,14287608422419064331,262144 --variations-seed-version /prefetch:8
1⤵
PID:3740

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
100KB

MD5
54e437ca9e4cfcc0e25200c50b2066ca

SHA1
eaa50781c524a2285f3ed2b4d648a2045665d4c2

SHA256
da8404e2aad1add8d1fba922e66a68244e5b580d83d9be53be9fa86fb000a416

SHA512
cfae8c0e547d5a404dd763f91fb580917b7ca542778843a5ad8788d1b2c9d1b040b2eda4e8e27cccba9bf3c8125157101b000901e44cdbd12488416ef35920a2

Download Submit
memory/3380-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3380-1-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/3380-2-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/3380-3-0x0000000000600000-0x0000000000606000-memory.dmp

Filesize
24KB

Download
memory/3380-20-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3516-18-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3516-19-0x0000000002100000-0x0000000002106000-memory.dmp

Filesize
24KB

Download
memory/3516-26-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download