c52388c54a21a35372f358c0444701ef7961b782a91720477cb1a7b1484aa362

Analysis

max time kernel
148s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20231222-en
resource tags

arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
submitted
22/01/2024, 18:38

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General

Target

2024-01-22_8ff4801061c00f7f42cafa999a308b82_cryptolocker.exe
Size

61KB
MD5

8ff4801061c00f7f42cafa999a308b82
SHA1

f56ce753fd295e07ed813ce49d8925f118de5661
SHA256

c52388c54a21a35372f358c0444701ef7961b782a91720477cb1a7b1484aa362
SHA512

359287fb5a795becf13edfc1ed2782770b036ad8bac0ecf08ea40f0e0491a9aac25950014d0addddae5d1f2b22727b5408f060f27e3d5c20f87f151b1bade564
SSDEEP

768:P8mnjO6LsoEEeegiZPvEhHSG+gbum/kLyMro2GtOOtEvwDpjKvWxHCbSVaFn0jKY:P8mnK6QFElP6n+gymddpMOtEvwDpjYhY

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/5320-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0007000000023229-13.dat	CryptoLocker_rule2
behavioral2/memory/5320-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2068-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/5320-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0007000000023229-13.dat	CryptoLocker_set1
behavioral2/memory/5320-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/2068-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/5320-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/files/0x0007000000023229-13.dat	UPX
behavioral2/memory/5320-17-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/2068-26-0x0000000000500000-0x000000000050F311-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-1-5-21-1168293393-3419776239-306423207-1000\Control Panel\International\Geo\Nation	2024-01-22_8ff4801061c00f7f42cafa999a308b82_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2068	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/5320-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/files/0x0007000000023229-13.dat	upx
behavioral2/memory/5320-17-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/2068-26-0x0000000000500000-0x000000000050F311-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 5320 wrote to memory of 2068	5320	2024-01-22_8ff4801061c00f7f42cafa999a308b82_cryptolocker.exe	86
PID 5320 wrote to memory of 2068	5320	2024-01-22_8ff4801061c00f7f42cafa999a308b82_cryptolocker.exe	86
PID 5320 wrote to memory of 2068	5320	2024-01-22_8ff4801061c00f7f42cafa999a308b82_cryptolocker.exe	86

C:\Users\Admin\AppData\Local\Temp\2024-01-22_8ff4801061c00f7f42cafa999a308b82_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-01-22_8ff4801061c00f7f42cafa999a308b82_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:5320
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2068

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
61KB

MD5
aa17b691558df402ea3f536b6f32a51b

SHA1
9139ab1846de039388a70e925215dabee30f077e

SHA256
fa23a8d6a39af82928fb6271bb2fad80014ac49c9018f4546dc85bd41184ffb0

SHA512
53fd01ac68b45b8ede03bff89ff8b143d3a765e9b08b879f6aebe530ec9d8cf18f7479fae4039d733b1044132d4ef733b8f7e1177efbdb620112987c3f7d0c9c

Download Submit
memory/2068-19-0x0000000000750000-0x0000000000756000-memory.dmp

Filesize
24KB

Download
memory/2068-20-0x0000000000620000-0x0000000000626000-memory.dmp

Filesize
24KB

Download
memory/2068-26-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/5320-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/5320-1-0x00000000021E0000-0x00000000021E6000-memory.dmp

Filesize
24KB

Download
memory/5320-3-0x00000000020F0000-0x00000000020F6000-memory.dmp

Filesize
24KB

Download
memory/5320-2-0x00000000021E0000-0x00000000021E6000-memory.dmp

Filesize
24KB

Download
memory/5320-17-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download