d9c3625d91904b747b9f17bf38b27d2b926bbb3fc0c68a379678ac5f13abec94

Analysis

max time kernel
141s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
04-02-2024 19:29

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General

Target

2024-02-04_5a4044221f420c617bac27b139d1a010_cryptolocker.exe
Size

78KB
MD5

5a4044221f420c617bac27b139d1a010
SHA1

d574ff86ab48ab278b7944ccad2e600fa5009857
SHA256

d9c3625d91904b747b9f17bf38b27d2b926bbb3fc0c68a379678ac5f13abec94
SHA512

5a2830c6fb82abf95b956924086e46341ccb2b98b2817b02cbd477842b061e8432699c10fc989cf383cb73261133dc695be71438c100c6423a47be250cee19f1
SSDEEP

1536:zj+soPSMOtEvwDpj4ktBl01hJ0tq1ky7Qp/:zCsanOtEvwDpj1

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/3984-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000700000002323c-13.dat	CryptoLocker_rule2
behavioral2/memory/3984-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2324-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2324-55-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/3984-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000700000002323c-13.dat	CryptoLocker_set1
behavioral2/memory/3984-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2324-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2324-55-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/3984-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000700000002323c-13.dat	UPX
behavioral2/memory/3984-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2324-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2324-55-0x0000000000500000-0x0000000000510000-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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-635608581-3370340891-292606865-1000\Control Panel\International\Geo\Nation	misid.exe
Key value queried	\REGISTRY\USER\S-1-5-21-635608581-3370340891-292606865-1000\Control Panel\International\Geo\Nation	2024-02-04_5a4044221f420c617bac27b139d1a010_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2324	misid.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3984-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000700000002323c-13.dat	upx
behavioral2/memory/3984-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/2324-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/2324-55-0x0000000000500000-0x0000000000510000-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

description	pid	Process	procid_target
PID 3984 wrote to memory of 2324	3984	2024-02-04_5a4044221f420c617bac27b139d1a010_cryptolocker.exe	83
PID 3984 wrote to memory of 2324	3984	2024-02-04_5a4044221f420c617bac27b139d1a010_cryptolocker.exe	83
PID 3984 wrote to memory of 2324	3984	2024-02-04_5a4044221f420c617bac27b139d1a010_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-02-04_5a4044221f420c617bac27b139d1a010_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-04_5a4044221f420c617bac27b139d1a010_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3984
- 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:2324

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
78KB

MD5
255a364eacd4301e068f0bca9e77c93c

SHA1
b6b81eb4cb77c537ba3b33b3b7c592bbac2dc5b7

SHA256
9df614107e428c8066f80ba18cfb296bf21468ab2220d172c30cd43bfed0d673

SHA512
1437a158dad11caef1fe61f78ba3904bc7c7df0cdfb94faf46a9b117fc1a50a392b01edc52dc10ac3a760e3fa4d63c79138623ea4075183fed68146333af6704

Download Submit
memory/2324-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2324-20-0x0000000000590000-0x0000000000596000-memory.dmp

Filesize
24KB

Download
memory/2324-21-0x0000000000490000-0x0000000000496000-memory.dmp

Filesize
24KB

Download
memory/2324-55-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3984-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3984-1-0x00000000005F0000-0x00000000005F6000-memory.dmp

Filesize
24KB

Download
memory/3984-2-0x00000000005F0000-0x00000000005F6000-memory.dmp

Filesize
24KB

Download
memory/3984-3-0x0000000000610000-0x0000000000616000-memory.dmp

Filesize
24KB

Download
memory/3984-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download