c3d87352f52de4a2b9fc5b4f2d61cf1e117dc076b2a72492966e36bdaacfbc8a

Analysis

max time kernel
148s
max time network
156s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
05/03/2024, 05:58

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General

Target

2024-03-05_a8f123fc397ab3f4ab084bda670feced_cryptolocker.exe
Size

39KB
MD5

a8f123fc397ab3f4ab084bda670feced
SHA1

652d0a273a231125797afcfb8294bf22bbb6f47f
SHA256

c3d87352f52de4a2b9fc5b4f2d61cf1e117dc076b2a72492966e36bdaacfbc8a
SHA512

fc28cba405157458f7742f08af3506c0a7422abf88db930ab4819de9d83eb6d78000b603f4149548ca8a79aaedaeec1e18e95ab19345eb43ceae3b0413d20a10
SSDEEP

768:TS5nQJ24LR7tOOtEvwDpjGqPhqlcnvgpnr:m5nkFNMOtEvwDpjG8hgpr

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4444-0-0x0000000000500000-0x000000000050E000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0007000000023202-13.dat	CryptoLocker_rule2
behavioral2/memory/4444-17-0x0000000000500000-0x000000000050E000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2180-58-0x0000000000500000-0x000000000050E000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 2 IoCs

resource	yara_rule
behavioral2/memory/4444-17-0x0000000000500000-0x000000000050E000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2180-58-0x0000000000500000-0x000000000050E000-memory.dmp	CryptoLocker_set1

Detects executables built or packed with MPress PE compressor 4 IoCs

resource	yara_rule
behavioral2/memory/4444-0-0x0000000000500000-0x000000000050E000-memory.dmp	INDICATOR_EXE_Packed_MPress
behavioral2/files/0x0007000000023202-13.dat	INDICATOR_EXE_Packed_MPress
behavioral2/memory/4444-17-0x0000000000500000-0x000000000050E000-memory.dmp	INDICATOR_EXE_Packed_MPress
behavioral2/memory/2180-58-0x0000000000500000-0x000000000050E000-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-1-5-21-513485977-2495024337-1260977654-1000\Control Panel\International\Geo\Nation	2024-03-05_a8f123fc397ab3f4ab084bda670feced_cryptolocker.exe
Key value queried	\REGISTRY\USER\S-1-5-21-513485977-2495024337-1260977654-1000\Control Panel\International\Geo\Nation	misid.exe

Executes dropped EXE 1 IoCs

pid	Process
2180	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 4444 wrote to memory of 2180	4444	2024-03-05_a8f123fc397ab3f4ab084bda670feced_cryptolocker.exe	90
PID 4444 wrote to memory of 2180	4444	2024-03-05_a8f123fc397ab3f4ab084bda670feced_cryptolocker.exe	90
PID 4444 wrote to memory of 2180	4444	2024-03-05_a8f123fc397ab3f4ab084bda670feced_cryptolocker.exe	90

C:\Users\Admin\AppData\Local\Temp\2024-03-05_a8f123fc397ab3f4ab084bda670feced_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-05_a8f123fc397ab3f4ab084bda670feced_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4444
- 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:2180

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
39KB

MD5
b584dc58ad6aa022722f5336cdf33285

SHA1
920222fc620ded07c4525b912f8166c2d9595cbc

SHA256
1a0162d36835997b21163e6ac1661beaf5584b053f22d2e10da1af6ecbe24b08

SHA512
5cbb3d4d5be50a78c288a1bdedb4e065347182ad6da90f03a6c098d96acb9eef87a619cb35714f3163754e00d36108d1ec01dd98e338235afd88c8f7897d4c68

Download Submit
memory/2180-20-0x0000000000730000-0x0000000000736000-memory.dmp

Filesize
24KB

Download
memory/2180-19-0x0000000000750000-0x0000000000756000-memory.dmp

Filesize
24KB

Download
memory/2180-58-0x0000000000500000-0x000000000050E000-memory.dmp

Filesize
56KB

Download
memory/4444-0-0x0000000000500000-0x000000000050E000-memory.dmp

Filesize
56KB

Download
memory/4444-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/4444-2-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/4444-3-0x00000000006D0000-0x00000000006D6000-memory.dmp

Filesize
24KB

Download
memory/4444-17-0x0000000000500000-0x000000000050E000-memory.dmp

Filesize
56KB

Download