5909c25ed3202f449582b26042f2737ce8b91339745d283bf69c0bbc496b1c1b

Analysis

max time kernel
150s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
13-03-2024 22:24

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General

Target

2024-03-13_21c58c18ab6b6ab22fc2a8a1e8f63cc8_cryptolocker.exe
Size

81KB
MD5

21c58c18ab6b6ab22fc2a8a1e8f63cc8
SHA1

ce582022fc9b33e3b11f6a7a6dba7ba716802a38
SHA256

5909c25ed3202f449582b26042f2737ce8b91339745d283bf69c0bbc496b1c1b
SHA512

d613076d07198b410fe6cb582967e8bd76e1a693133c1838389bcc6193169dc1c4644bde05762301ab663a5360060341d6efbbf6418cc0dcd5433e8546a91219
SSDEEP

1536:Tj+jsMQMOtEvwDpj5HmpJpOUHECgNMo0vp2EMM+:TCjsIOtEvwDpj5HE/OUHnSMc

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3664-0-0x0000000000500000-0x000000000050E000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000200000001f656-13.dat	CryptoLocker_rule2
behavioral2/memory/3664-17-0x0000000000500000-0x000000000050E000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1852-26-0x0000000000500000-0x000000000050E000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/3664-0-0x0000000000500000-0x000000000050E000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000200000001f656-13.dat	CryptoLocker_set1
behavioral2/memory/3664-17-0x0000000000500000-0x000000000050E000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1852-26-0x0000000000500000-0x000000000050E000-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-1-5-21-557049126-2506969350-2798870634-1000\Control Panel\International\Geo\Nation	2024-03-13_21c58c18ab6b6ab22fc2a8a1e8f63cc8_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1852	misid.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 3664 wrote to memory of 1852	3664	2024-03-13_21c58c18ab6b6ab22fc2a8a1e8f63cc8_cryptolocker.exe	89
PID 3664 wrote to memory of 1852	3664	2024-03-13_21c58c18ab6b6ab22fc2a8a1e8f63cc8_cryptolocker.exe	89
PID 3664 wrote to memory of 1852	3664	2024-03-13_21c58c18ab6b6ab22fc2a8a1e8f63cc8_cryptolocker.exe	89

C:\Users\Admin\AppData\Local\Temp\2024-03-13_21c58c18ab6b6ab22fc2a8a1e8f63cc8_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-13_21c58c18ab6b6ab22fc2a8a1e8f63cc8_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3664
- C:\Users\Admin\AppData\Local\Temp\misid.exe
  "C:\Users\Admin\AppData\Local\Temp\misid.exe"
  2⤵
  - Executes dropped EXE
  PID:1852

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
82KB

MD5
371dc94aa74449cdea348d172325546e

SHA1
cae3e577ed7f40b2794b40a56ff6943d5e40b1cf

SHA256
a6a2e5633f6474927a157cd35e2cd7132e1effcf0bed32ef5a74fa2d2dfc4fb7

SHA512
800685b806566985057513425b16f0f86c5e2cf8bcae89657ca5e4e5c4680b649aba11b0b9500a9525c45f6c6e7342afea95b58538fd0fe88e8ada1a9ad15bb9

Download Submit
memory/1852-21-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/1852-19-0x00000000005D0000-0x00000000005D6000-memory.dmp

Filesize
24KB

Download
memory/1852-26-0x0000000000500000-0x000000000050E000-memory.dmp

Filesize
56KB

Download
memory/3664-0-0x0000000000500000-0x000000000050E000-memory.dmp

Filesize
56KB

Download
memory/3664-1-0x0000000000770000-0x0000000000776000-memory.dmp

Filesize
24KB

Download
memory/3664-2-0x0000000000770000-0x0000000000776000-memory.dmp

Filesize
24KB

Download
memory/3664-3-0x0000000002230000-0x0000000002236000-memory.dmp

Filesize
24KB

Download
memory/3664-17-0x0000000000500000-0x000000000050E000-memory.dmp

Filesize
56KB

Download