27ad2d13ca9d5948453e4ef9ff4dee05972162f1f8dca3796fc6dba3e74ad8e1

Analysis

max time kernel
149s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240221-en
resource tags

arch:x64arch:x86image:win10v2004-20240221-enlocale:en-usos:windows10-2004-x64system
submitted
21/02/2024, 16:47

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General

Target

2024-02-21_78059d945f9c9d4f6c0d3e3a8fc09fd5_cryptolocker.exe
Size

54KB
MD5

78059d945f9c9d4f6c0d3e3a8fc09fd5
SHA1

c5afd4604de4f2f1111fce8f3b7fe1324e3eb9c1
SHA256

27ad2d13ca9d5948453e4ef9ff4dee05972162f1f8dca3796fc6dba3e74ad8e1
SHA512

9f675d8b1d36e4e89d5ffbe5ff51d1c1b4f1a99db551c6fcb6f39b4fdabf8a621ecb096180f6b73ec47a1095f2b5e9f883b285276902059220d4a47fd6080d04
SSDEEP

384:x0VkMq01bJ3wtEwPS8HLEh+Jagz+3be+26a4rIcVRYp055TOtOOtEvwDpjqIGR57:xQz7yVEhs9+4uR1bytOOtEvwDpjWfbKq

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4316-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000c000000023139-13.dat	CryptoLocker_rule2
behavioral2/memory/4316-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4708-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4316-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000c000000023139-13.dat	CryptoLocker_set1
behavioral2/memory/4316-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4708-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

Detects executables built or packed with MPress PE compressor 4 IoCs

resource	yara_rule
behavioral2/memory/4316-0-0x0000000000500000-0x0000000000510000-memory.dmp	INDICATOR_EXE_Packed_MPress
behavioral2/files/0x000c000000023139-13.dat	INDICATOR_EXE_Packed_MPress
behavioral2/memory/4316-17-0x0000000000500000-0x0000000000510000-memory.dmp	INDICATOR_EXE_Packed_MPress
behavioral2/memory/4708-26-0x0000000000500000-0x0000000000510000-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-1-5-21-1392040655-2056082574-619088944-1000\Control Panel\International\Geo\Nation	2024-02-21_78059d945f9c9d4f6c0d3e3a8fc09fd5_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4708	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 4316 wrote to memory of 4708	4316	2024-02-21_78059d945f9c9d4f6c0d3e3a8fc09fd5_cryptolocker.exe	84
PID 4316 wrote to memory of 4708	4316	2024-02-21_78059d945f9c9d4f6c0d3e3a8fc09fd5_cryptolocker.exe	84
PID 4316 wrote to memory of 4708	4316	2024-02-21_78059d945f9c9d4f6c0d3e3a8fc09fd5_cryptolocker.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-02-21_78059d945f9c9d4f6c0d3e3a8fc09fd5_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-21_78059d945f9c9d4f6c0d3e3a8fc09fd5_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4316
- C:\Users\Admin\AppData\Local\Temp\misid.exe
  "C:\Users\Admin\AppData\Local\Temp\misid.exe"
  2⤵
  - Executes dropped EXE
  PID:4708

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
54KB

MD5
1641f08104f14ee0e2c2354417307ad4

SHA1
467d6ddf97a2dda3ccbe37ddbabb8f42f81bc5dd

SHA256
552d1df3114404d78e47620af64108e520821b99290e355603c30ee7201f67b8

SHA512
ee4a4e1d0011bcfa761ce0da58b3a07dee566cbb2269ac0901e8b96bd89dffa9e60fda3d204631215045e31600f88a9ae6a90235ecf48f9ce27430318663cad0

Download Submit
memory/4316-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4316-1-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/4316-2-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/4316-3-0x00000000005D0000-0x00000000005D6000-memory.dmp

Filesize
24KB

Download
memory/4316-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4708-19-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/4708-21-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4708-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download