598fe0022886775e84a59acd1ac02e32fd9e9b9351377eaec0b0eeb11d910801

Analysis

max time kernel
148s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
10-03-2024 01:45

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General

Target

2024-03-10_457acdec63898122e56447b1ea86ccc3_cryptolocker.exe
Size

45KB
MD5

457acdec63898122e56447b1ea86ccc3
SHA1

4f0c8d8a02565cde06a6bf469c149e83eb788c85
SHA256

598fe0022886775e84a59acd1ac02e32fd9e9b9351377eaec0b0eeb11d910801
SHA512

9a3e76789681300e0750f16085a461cd26c27f1f6ff41203b753fc72955e3f65d62e556e2c74fb81720c768df384c9244f5b23a5d32575ab131cc44e64ff1599
SSDEEP

768:79inqyNR/QtOOtEvwDpjBKccJVODvcjpEy9:79mqyNhQMOtEvwDpjBzck69

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 3 IoCs

resource	yara_rule
behavioral2/memory/1228-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000d00000002311e-13.dat	CryptoLocker_rule2
behavioral2/memory/1228-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 3 IoCs

resource	yara_rule
behavioral2/memory/1228-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000d00000002311e-13.dat	CryptoLocker_set1
behavioral2/memory/1228-17-0x0000000000500000-0x000000000050F000-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-1-5-21-1497073144-2389943819-3385106915-1000\Control Panel\International\Geo\Nation	2024-03-10_457acdec63898122e56447b1ea86ccc3_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3948	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 1228 wrote to memory of 3948	1228	2024-03-10_457acdec63898122e56447b1ea86ccc3_cryptolocker.exe	85
PID 1228 wrote to memory of 3948	1228	2024-03-10_457acdec63898122e56447b1ea86ccc3_cryptolocker.exe	85
PID 1228 wrote to memory of 3948	1228	2024-03-10_457acdec63898122e56447b1ea86ccc3_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-03-10_457acdec63898122e56447b1ea86ccc3_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-10_457acdec63898122e56447b1ea86ccc3_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1228
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3948

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
46KB

MD5
0009008192d78308edd9b09016b876ef

SHA1
8e12a19144ea00b6a2d054dab779786754a413fa

SHA256
6e20afadebdb65188e980daec599a772363b068540cb274c57510bfe8014950b

SHA512
6d87e5efb7caf1844fbdb33a82322838866e573a1562660c9174e04b4eeea1a68cc7cc7870cb6ed88bc70d8030d0d69723babd741a9ad5cc8713e5475de0bebe

Download Submit
memory/1228-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/1228-1-0x00000000005F0000-0x00000000005F6000-memory.dmp

Filesize
24KB

Download
memory/1228-2-0x00000000005F0000-0x00000000005F6000-memory.dmp

Filesize
24KB

Download
memory/1228-3-0x0000000000610000-0x0000000000616000-memory.dmp

Filesize
24KB

Download
memory/1228-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3948-19-0x0000000002070000-0x0000000002076000-memory.dmp

Filesize
24KB

Download
memory/3948-25-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download