43177e424cdf9b624dc690cd0c4c5899cf14e1a4f8526dacfebbc2bb0a047b54

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20231222-en
resource tags

arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
submitted
12-02-2024 09:34

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General

Target

2024-02-12_2a10f29c37c5522b928d575d400c58d8_cryptolocker.exe
Size

43KB
MD5

2a10f29c37c5522b928d575d400c58d8
SHA1

4ff66ab91986436fb96418da5f0286c6e0f20e3a
SHA256

43177e424cdf9b624dc690cd0c4c5899cf14e1a4f8526dacfebbc2bb0a047b54
SHA512

081430428d3c3fda39976b99926e881f814290306cea73533cc4d76f9f34a3471f23a7b3c0aff2f30c843fe3e3296f7518f2f8cac9564e5b6e54e372b8b5ce58
SSDEEP

768:79inqyNR/QtOOtEvwDpjBKccJVODvyLUVm7:79mqyNhQMOtEvwDpjBzckpi

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 3 IoCs

resource	yara_rule
behavioral2/memory/4268-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0007000000023237-13.dat	CryptoLocker_rule2
behavioral2/memory/4268-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 3 IoCs

resource	yara_rule
behavioral2/memory/4268-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0007000000023237-13.dat	CryptoLocker_set1
behavioral2/memory/4268-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

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-1-5-21-3803511929-1339359695-2191195476-1000\Control Panel\International\Geo\Nation	2024-02-12_2a10f29c37c5522b928d575d400c58d8_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1636	asih.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 4268 wrote to memory of 1636	4268	2024-02-12_2a10f29c37c5522b928d575d400c58d8_cryptolocker.exe	85
PID 4268 wrote to memory of 1636	4268	2024-02-12_2a10f29c37c5522b928d575d400c58d8_cryptolocker.exe	85
PID 4268 wrote to memory of 1636	4268	2024-02-12_2a10f29c37c5522b928d575d400c58d8_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-02-12_2a10f29c37c5522b928d575d400c58d8_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-12_2a10f29c37c5522b928d575d400c58d8_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4268
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1636

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\asih.exe

Filesize
43KB

MD5
be11e7eb271eb625b77ba8c8d31b365b

SHA1
cc34c56cf601b8a1edaa8ea929081dc7c53341ff

SHA256
fe37b00db7edb8b877f4bd69f1105d1bf6f78c4809d6754ebbb32ed9faa21b70

SHA512
03b42532764946a70da635f7956c70eed7416c61dd6abefe806b857a79e03e2ca7e0818ed0cd314f23442a64958a9fe28e2e1e29f83e4f5cfd6872897e21ee8c

Download Submit
memory/1636-20-0x0000000000640000-0x0000000000646000-memory.dmp

Filesize
24KB

Download
memory/1636-19-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/4268-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4268-1-0x0000000000600000-0x0000000000606000-memory.dmp

Filesize
24KB

Download
memory/4268-2-0x0000000000600000-0x0000000000606000-memory.dmp

Filesize
24KB

Download
memory/4268-3-0x0000000000620000-0x0000000000626000-memory.dmp

Filesize
24KB

Download
memory/4268-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download