b38f2fce47d03098ec8419050296fcfc1c2a0c89b9a8c3e473c6e01328c766c0

Analysis

max time kernel
150s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
18-02-2024 22:31

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General

Target

2024-02-18_2e749a176ebe871f6e7e407dd98c48d0_cryptolocker.exe
Size

56KB
MD5

2e749a176ebe871f6e7e407dd98c48d0
SHA1

2f06b86739dc4cb1de4285961c22eae33d099f15
SHA256

b38f2fce47d03098ec8419050296fcfc1c2a0c89b9a8c3e473c6e01328c766c0
SHA512

5846e9c3375162f041ae9a0ba2a5aa2a1e7fc054fda93bfabcdfe59bf2aa69c2c8b17c63681753595866bd385da893cfcd9e99ab646bc5756a397a7e338046d2
SSDEEP

768:zQz7yVEhs9+syJP6ntOOtEvwDpjFeV0ZOfcpymP:zj+soPSMOtEvwDpj4yB

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/1316-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0007000000023210-13.dat	CryptoLocker_rule2
behavioral2/memory/1316-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/5040-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/1316-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0007000000023210-13.dat	CryptoLocker_set1
behavioral2/memory/1316-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/5040-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/1316-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0007000000023210-13.dat	UPX
behavioral2/memory/1316-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/5040-26-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

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-1-5-21-2398549320-3657759451-817663969-1000\Control Panel\International\Geo\Nation	2024-02-18_2e749a176ebe871f6e7e407dd98c48d0_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
5040	misid.exe

UPX packed file 4 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/1316-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x0007000000023210-13.dat	upx
behavioral2/memory/1316-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/5040-26-0x0000000000500000-0x0000000000510000-memory.dmp	upx

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 1316 wrote to memory of 5040	1316	2024-02-18_2e749a176ebe871f6e7e407dd98c48d0_cryptolocker.exe	83
PID 1316 wrote to memory of 5040	1316	2024-02-18_2e749a176ebe871f6e7e407dd98c48d0_cryptolocker.exe	83
PID 1316 wrote to memory of 5040	1316	2024-02-18_2e749a176ebe871f6e7e407dd98c48d0_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-02-18_2e749a176ebe871f6e7e407dd98c48d0_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-18_2e749a176ebe871f6e7e407dd98c48d0_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1316
- C:\Users\Admin\AppData\Local\Temp\misid.exe
  "C:\Users\Admin\AppData\Local\Temp\misid.exe"
  2⤵
  - Executes dropped EXE
  PID:5040

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
57KB

MD5
04f74fb82b10081521dd37900b8def90

SHA1
06c149c3f5988412ece1ec40149d3d423a99a3d9

SHA256
e1b553abdfe57508b67a596ef3af28e7185d9d2574997927cba27f3aa21726ef

SHA512
1beb8bc20f5f302ce8282483feb7cbdd5ed9293051f67d0c62ec86acdc6b026f3afce0527fc6559dafdcf9b2c8b3f385e50ade7e242e02d3cc0e5610ca1a6b94

Download Submit
memory/1316-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1316-1-0x0000000000630000-0x0000000000636000-memory.dmp

Filesize
24KB

Download
memory/1316-2-0x0000000000630000-0x0000000000636000-memory.dmp

Filesize
24KB

Download
memory/1316-3-0x00000000020F0000-0x00000000020F6000-memory.dmp

Filesize
24KB

Download
memory/1316-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/5040-19-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/5040-20-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/5040-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download