798a421cb3fb9432d3b41a75e534c0294810c4ffebe8c5dae1d30e41284b3ae2

Analysis

max time kernel
89s
max time network
125s
platform
windows10-2004_x64
resource
win10v2004-20231222-en
resource tags

arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
submitted
14/02/2024, 06:42

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General

Target

2024-02-14_539fbedd5e8f054aa08074f89997c4ed_cryptolocker.exe
Size

38KB
MD5

539fbedd5e8f054aa08074f89997c4ed
SHA1

2c2df917f132881ae053231990182b5b01497f65
SHA256

798a421cb3fb9432d3b41a75e534c0294810c4ffebe8c5dae1d30e41284b3ae2
SHA512

d3d96eb3c8c739f25e3e597cf05ae6a071b694997cb586d7aa8c326d8e2d23dd4059bc7b3f978432ee26d95d3f92b9b67ff0fa4aa0440bb224fa8ecb479abf4f
SSDEEP

768:TS5nQJ24LR7tOOtEvwDpjGqPhqlcnvhx5/xFRy:m5nkFNMOtEvwDpjG8hhXk

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/4000-0-0x0000000000500000-0x000000000050E000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x00070000000231f5-13.dat	CryptoLocker_rule2
behavioral2/memory/2004-17-0x0000000000500000-0x000000000050E000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4000-18-0x0000000000500000-0x000000000050E000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2004-49-0x0000000000500000-0x000000000050E000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 2 IoCs

resource	yara_rule
behavioral2/memory/4000-18-0x0000000000500000-0x000000000050E000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2004-49-0x0000000000500000-0x000000000050E000-memory.dmp	CryptoLocker_set1

Detects executables built or packed with MPress PE compressor 5 IoCs

resource	yara_rule
behavioral2/memory/4000-0-0x0000000000500000-0x000000000050E000-memory.dmp	INDICATOR_EXE_Packed_MPress
behavioral2/files/0x00070000000231f5-13.dat	INDICATOR_EXE_Packed_MPress
behavioral2/memory/2004-17-0x0000000000500000-0x000000000050E000-memory.dmp	INDICATOR_EXE_Packed_MPress
behavioral2/memory/4000-18-0x0000000000500000-0x000000000050E000-memory.dmp	INDICATOR_EXE_Packed_MPress
behavioral2/memory/2004-49-0x0000000000500000-0x000000000050E000-memory.dmp	INDICATOR_EXE_Packed_MPress

Checks computer location settings 2 TTPs 2 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-1-5-21-3803511929-1339359695-2191195476-1000\Control Panel\International\Geo\Nation	2024-02-14_539fbedd5e8f054aa08074f89997c4ed_cryptolocker.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3803511929-1339359695-2191195476-1000\Control Panel\International\Geo\Nation	misid.exe

Executes dropped EXE 1 IoCs

pid	Process
2004	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 4000 wrote to memory of 2004	4000	2024-02-14_539fbedd5e8f054aa08074f89997c4ed_cryptolocker.exe	83
PID 4000 wrote to memory of 2004	4000	2024-02-14_539fbedd5e8f054aa08074f89997c4ed_cryptolocker.exe	83
PID 4000 wrote to memory of 2004	4000	2024-02-14_539fbedd5e8f054aa08074f89997c4ed_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-02-14_539fbedd5e8f054aa08074f89997c4ed_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-14_539fbedd5e8f054aa08074f89997c4ed_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4000
- C:\Users\Admin\AppData\Local\Temp\misid.exe
  "C:\Users\Admin\AppData\Local\Temp\misid.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  PID:2004

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
38KB

MD5
3a798d16ae26980da5e31c56a5c2b196

SHA1
e4c3bc3d426992869d97b29865f2cc62479740cc

SHA256
5b357737f7b639b82ecf93ec5a489b54ba2ad503597e788c7fd2a28d4d02ba86

SHA512
c2320f4af22376febcf324479039d112284aab811f2738d63e656f5f4104868aada38eb60e81b856b0918f35c957ca4b827f7c0ac452e1b8dbced38b9540c1e7

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

Filesize
315B

MD5
a34ac19f4afae63adc5d2f7bc970c07f

SHA1
a82190fc530c265aa40a045c21770d967f4767b8

SHA256
d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

SHA512
42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

Download Submit
memory/2004-17-0x0000000000500000-0x000000000050E000-memory.dmp

Filesize
56KB

Download
memory/2004-20-0x00000000006F0000-0x00000000006F6000-memory.dmp

Filesize
24KB

Download
memory/2004-26-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/2004-49-0x0000000000500000-0x000000000050E000-memory.dmp

Filesize
56KB

Download
memory/4000-0-0x0000000000500000-0x000000000050E000-memory.dmp

Filesize
56KB

Download
memory/4000-1-0x0000000002210000-0x0000000002216000-memory.dmp

Filesize
24KB

Download
memory/4000-2-0x0000000002210000-0x0000000002216000-memory.dmp

Filesize
24KB

Download
memory/4000-3-0x0000000002230000-0x0000000002236000-memory.dmp

Filesize
24KB

Download
memory/4000-18-0x0000000000500000-0x000000000050E000-memory.dmp

Filesize
56KB

Download