26b3ecb94a2fd8b8c33251d637049672ef8ff2c8146d154878791b60229e4191

Analysis

max time kernel
135s
max time network
157s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
04/02/2024, 01:41

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General

Target

2024-02-04_b453984e977a8dd37fb6a2ba0f0d965e_cryptolocker.exe
Size

55KB
MD5

b453984e977a8dd37fb6a2ba0f0d965e
SHA1

96da83c34af7387498cb473dea730aaf019d09b5
SHA256

26b3ecb94a2fd8b8c33251d637049672ef8ff2c8146d154878791b60229e4191
SHA512

cf2273097efed0861b8af66737dd49682f047246d013c3a4dcadd46cce00a8227061f8a7c1326802472de0ecb8458173e59894605e00a094b141c4af47717153
SSDEEP

768:xQz7yVEhs9+4uR1bytOOtEvwDpjWfbZgBh8i6g7Gowfj8:xj+VGMOtEvwDpjubEgu

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/916-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0007000000023127-13.dat	CryptoLocker_rule2
behavioral2/memory/916-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4520-56-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/916-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0007000000023127-13.dat	CryptoLocker_set1
behavioral2/memory/916-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4520-56-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

Detects executables built or packed with MPress PE compressor 4 IoCs

resource	yara_rule
behavioral2/memory/916-0-0x0000000000500000-0x0000000000510000-memory.dmp	INDICATOR_EXE_Packed_MPress
behavioral2/files/0x0007000000023127-13.dat	INDICATOR_EXE_Packed_MPress
behavioral2/memory/916-25-0x0000000000500000-0x0000000000510000-memory.dmp	INDICATOR_EXE_Packed_MPress
behavioral2/memory/4520-56-0x0000000000500000-0x0000000000510000-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-1-5-21-3073191680-435865314-2862784915-1000\Control Panel\International\Geo\Nation	2024-02-04_b453984e977a8dd37fb6a2ba0f0d965e_cryptolocker.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3073191680-435865314-2862784915-1000\Control Panel\International\Geo\Nation	misid.exe

Executes dropped EXE 1 IoCs

pid	Process
4520	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 916 wrote to memory of 4520	916	2024-02-04_b453984e977a8dd37fb6a2ba0f0d965e_cryptolocker.exe	83
PID 916 wrote to memory of 4520	916	2024-02-04_b453984e977a8dd37fb6a2ba0f0d965e_cryptolocker.exe	83
PID 916 wrote to memory of 4520	916	2024-02-04_b453984e977a8dd37fb6a2ba0f0d965e_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-02-04_b453984e977a8dd37fb6a2ba0f0d965e_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-04_b453984e977a8dd37fb6a2ba0f0d965e_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:916
- 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:4520

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\misid.exe

Filesize
56KB

MD5
407d15f8debca42e94c882a9cfd39ceb

SHA1
0d87bcaf94e69f0e3055ba6065cd1007621ac0a2

SHA256
34aa428b7d858247bcd441e34f80963227dbcc8b10dcdce5e2ad9a4e184d1609

SHA512
01dd5ffd66f2eca4adcc34f193ffb4ea9a0ead9710945e19ca03f2507b9d37e39aac50738a0a6b1f2d946747c6a1ac092907136166520db6e2f0c4d23469b1d9

Download Submit
memory/916-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/916-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/916-2-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/916-3-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/916-25-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4520-18-0x00000000005C0000-0x00000000005C6000-memory.dmp

Filesize
24KB

Download
memory/4520-21-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/4520-56-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download