754d556b2751ec2c96159ca3e52539a9b2a01af8cd2e9767ef8358b1f0d0ce19

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
20-03-2024 02:50

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General

Target

2024-03-20_6851b45daff176ba2850c18efee0eae9_cryptolocker.exe
Size

41KB
MD5

6851b45daff176ba2850c18efee0eae9
SHA1

9c1686518d32c3021fced769b8932f0bc1267527
SHA256

754d556b2751ec2c96159ca3e52539a9b2a01af8cd2e9767ef8358b1f0d0ce19
SHA512

580f050d14c4dbd050dff9031d188cddbfb010ac1b733425a40ff215eec03d0ac13bf9582ebdb5cac64c2f97890021bd32d7f2d84cf3285fa799516b7b2dc46a
SSDEEP

768:6Qz7yVEhs9+4OR7tOOtEvwDpjLHqh6/BJp:6j+1NMOtEvwDpjrR5

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4620-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000400000001e980-13.dat	CryptoLocker_rule2
behavioral2/memory/4620-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1612-25-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4620-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000400000001e980-13.dat	CryptoLocker_set1
behavioral2/memory/4620-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1612-25-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

Detects executables built or packed with MPress PE compressor 4 IoCs

resource	yara_rule
behavioral2/memory/4620-0-0x0000000000500000-0x000000000050F000-memory.dmp	INDICATOR_EXE_Packed_MPress
behavioral2/files/0x000400000001e980-13.dat	INDICATOR_EXE_Packed_MPress
behavioral2/memory/4620-17-0x0000000000500000-0x000000000050F000-memory.dmp	INDICATOR_EXE_Packed_MPress
behavioral2/memory/1612-25-0x0000000000500000-0x000000000050F000-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-1-5-21-3270530367-132075249-2153716227-1000\Control Panel\International\Geo\Nation	2024-03-20_6851b45daff176ba2850c18efee0eae9_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1612	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 4620 wrote to memory of 1612	4620	2024-03-20_6851b45daff176ba2850c18efee0eae9_cryptolocker.exe	89
PID 4620 wrote to memory of 1612	4620	2024-03-20_6851b45daff176ba2850c18efee0eae9_cryptolocker.exe	89
PID 4620 wrote to memory of 1612	4620	2024-03-20_6851b45daff176ba2850c18efee0eae9_cryptolocker.exe	89

C:\Users\Admin\AppData\Local\Temp\2024-03-20_6851b45daff176ba2850c18efee0eae9_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-20_6851b45daff176ba2850c18efee0eae9_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4620
- C:\Users\Admin\AppData\Local\Temp\misid.exe
  "C:\Users\Admin\AppData\Local\Temp\misid.exe"
  2⤵
  - Executes dropped EXE
  PID:1612

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
64f15ef46074cf0cf16a70b2ab198d4b

SHA1
1e446b0b1fc7b2b417cab3433e9f496a00a7a565

SHA256
5b8405b397df3c64dba7af4f2392a59ffa8f18b061363f6611a073498bee997a

SHA512
446b24ee972883ed922f134065a47c79e481d037cc972a8861f2d0316714518b7bd871589312f3abb953a003e001dc40e0e8688c415bc5b7099df755c3735a55

Download Submit
memory/1612-25-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4620-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4620-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4620-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4620-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/4620-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download