0be73871d53d03b1873f61c5300af5c5b19f0556124cea21b193487c2336ed07

Analysis

max time kernel
140s
max time network
156s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
25/01/2024, 15:01

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General

Target

2024-01-25_f2a894df991bfaf7ed3d1d0109e80867_cryptolocker.exe
Size

62KB
MD5

f2a894df991bfaf7ed3d1d0109e80867
SHA1

fe37156004dc5979d8fc7d986285a04f3108accf
SHA256

0be73871d53d03b1873f61c5300af5c5b19f0556124cea21b193487c2336ed07
SHA512

3adba992c26821b5637c40cb11225deac5efe1e7e3f48d3f1551835bca6b09d581d9357bf2287dbfb99607b2a69b364e8a39770f00ff2f15545cd4bd4776ce3b
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjYibAoH:1nK6a+qdOOtEvwDpjJ

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/1716-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0009000000022480-13.dat	CryptoLocker_rule2
behavioral2/memory/1716-18-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4496-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/1716-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0009000000022480-13.dat	CryptoLocker_set1
behavioral2/memory/1716-18-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/4496-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/1716-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/files/0x0009000000022480-13.dat	UPX
behavioral2/memory/1716-18-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/4496-26-0x0000000000500000-0x000000000050F311-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-1-5-21-3073191680-435865314-2862784915-1000\Control Panel\International\Geo\Nation	2024-01-25_f2a894df991bfaf7ed3d1d0109e80867_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4496	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1716-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/files/0x0009000000022480-13.dat	upx
behavioral2/memory/1716-18-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/4496-26-0x0000000000500000-0x000000000050F311-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 1716 wrote to memory of 4496	1716	2024-01-25_f2a894df991bfaf7ed3d1d0109e80867_cryptolocker.exe	91
PID 1716 wrote to memory of 4496	1716	2024-01-25_f2a894df991bfaf7ed3d1d0109e80867_cryptolocker.exe	91
PID 1716 wrote to memory of 4496	1716	2024-01-25_f2a894df991bfaf7ed3d1d0109e80867_cryptolocker.exe	91

C:\Users\Admin\AppData\Local\Temp\2024-01-25_f2a894df991bfaf7ed3d1d0109e80867_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-01-25_f2a894df991bfaf7ed3d1d0109e80867_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1716
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4496

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
63KB

MD5
eadd1b3ccda810852929e08a3025bec2

SHA1
b690a9c113cc75575abe4ca7a443e660903e2215

SHA256
f093580fd4a4909eb7a6741bdbbdb3237494bb47bc4db02ba3009bf48761a9da

SHA512
f892f33d55550df142649277ae9134fb3c4c415fb06af3de0318ade2f9dfa4eebd62621e18e6c0bed0f02395d6f4f4131e8ec369f101ca73bde69453b83e9432

Download Submit
memory/1716-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/1716-1-0x00000000020E0000-0x00000000020E6000-memory.dmp

Filesize
24KB

Download
memory/1716-2-0x00000000020E0000-0x00000000020E6000-memory.dmp

Filesize
24KB

Download
memory/1716-3-0x0000000002110000-0x0000000002116000-memory.dmp

Filesize
24KB

Download
memory/1716-18-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/4496-21-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4496-19-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/4496-26-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download