41418def11f5b00dd2d4d4e70798f5c9d5dd92c41db66043d1354697b770deb2

Analysis

max time kernel
88s
max time network
126s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
12-02-2024 20:16

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General

Target

2024-02-12_b79a4e75df2da2815132a6cbaf923cfb_cryptolocker.exe
Size

80KB
MD5

b79a4e75df2da2815132a6cbaf923cfb
SHA1

87a5f71ae9bf8b3a0460834ab931d206e4976186
SHA256

41418def11f5b00dd2d4d4e70798f5c9d5dd92c41db66043d1354697b770deb2
SHA512

7ee549311b2eb6e98f02eb0046148cf9a7e00c035ec4394aeee8dce5acb7ff3895d82235b33fe705ac459992ae49f56cfaad1c376bcce2d8a3ea6d157fee6f67
SSDEEP

1536:zj+soPSMOtEvwDpj4ktBl01hJ0tq1ky2fs:zCsanOtEvwDpj6

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2348-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\misid.exe	CryptoLocker_rule2
behavioral2/memory/3340-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2348-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3340-55-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2348-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\misid.exe	CryptoLocker_set1
behavioral2/memory/3340-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2348-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3340-55-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2348-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\misid.exe	UPX
behavioral2/memory/3340-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2348-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3340-55-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

2024-02-12_b79a4e75df2da2815132a6cbaf923cfb_cryptolocker.exemisid.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1232405761-1209240240-3206092754-1000\Control Panel\International\Geo\Nation	2024-02-12_b79a4e75df2da2815132a6cbaf923cfb_cryptolocker.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1232405761-1209240240-3206092754-1000\Control Panel\International\Geo\Nation	misid.exe

Executes dropped EXE 1 IoCs

Processes:

misid.exe

pid process

3340 misid.exe

pid	process
3340	misid.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/2348-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\misid.exe	upx
behavioral2/memory/3340-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/2348-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/3340-55-0x0000000000500000-0x0000000000510000-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

Processes:

2024-02-12_b79a4e75df2da2815132a6cbaf923cfb_cryptolocker.exe

description	pid	process	target process
PID 2348 wrote to memory of 3340	2348	2024-02-12_b79a4e75df2da2815132a6cbaf923cfb_cryptolocker.exe	misid.exe
PID 2348 wrote to memory of 3340	2348	2024-02-12_b79a4e75df2da2815132a6cbaf923cfb_cryptolocker.exe	misid.exe
PID 2348 wrote to memory of 3340	2348	2024-02-12_b79a4e75df2da2815132a6cbaf923cfb_cryptolocker.exe	misid.exe

C:\Users\Admin\AppData\Local\Temp\2024-02-12_b79a4e75df2da2815132a6cbaf923cfb_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-12_b79a4e75df2da2815132a6cbaf923cfb_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2348

C:\Users\Admin\AppData\Local\Temp\misid.exe
"C:\Users\Admin\AppData\Local\Temp\misid.exe"
2⤵
- Checks computer location settings
- Executes dropped EXE
PID:3340

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
81KB

MD5
a1d8bed4f268aab3c3000b5fb9ea465a

SHA1
dd6dd4a4d91c78acb613b312a75b9b50633e2c0e

SHA256
b3552345f58c9aa780b59799ae00063189e1a7f96ab6c24862cd75a37d0d54bb

SHA512
558bd7cf2c62ebaba45a80050698829a32e5fd9f36e78ab6a45c6b38fa4790f9a71ac81a386445ff702465f51b9bfd1cd293cac3626c68ac23148ddd57f3da57

Download Submit
memory/2348-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2348-1-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/2348-3-0x00000000005C0000-0x00000000005C6000-memory.dmp

Filesize
24KB

Download
memory/2348-2-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/2348-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3340-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3340-20-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/3340-26-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3340-55-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download