f6ac0382466bea46edf32a9a40f53790abb78675bc591d12ae417129cdf587c1

Analysis

max time kernel
149s
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
17/02/2024, 18:22

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General

Target

2024-02-17_012a829896000de1b5f5f3c3174614df_cryptolocker.exe
Size

81KB
MD5

012a829896000de1b5f5f3c3174614df
SHA1

0326f8c863569baa14b23a9599e5d0c890e7210f
SHA256

f6ac0382466bea46edf32a9a40f53790abb78675bc591d12ae417129cdf587c1
SHA512

4a284f7e359c81d26be7f4f6a6c79849d85dd3142404fbeff554405133f9240163929056f8ffc408e53587067895db5e1fd3d49f8ed168563220e3cb4430c37a
SSDEEP

1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOAkXtBd0w:T6a+rdOOtEvwDpjNtP

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3208-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x00070000000231e7-13.dat	CryptoLocker_rule2
behavioral2/memory/3208-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4700-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/3208-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x00070000000231e7-13.dat	CryptoLocker_set1
behavioral2/memory/3208-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4700-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/3208-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x00070000000231e7-13.dat	UPX
behavioral2/memory/3208-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4700-26-0x0000000000500000-0x0000000000510000-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-1-5-21-996941297-2279405024-2328152752-1000\Control Panel\International\Geo\Nation	2024-02-17_012a829896000de1b5f5f3c3174614df_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4700	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3208-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x00070000000231e7-13.dat	upx
behavioral2/memory/3208-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4700-26-0x0000000000500000-0x0000000000510000-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 3208 wrote to memory of 4700	3208	2024-02-17_012a829896000de1b5f5f3c3174614df_cryptolocker.exe	84
PID 3208 wrote to memory of 4700	3208	2024-02-17_012a829896000de1b5f5f3c3174614df_cryptolocker.exe	84
PID 3208 wrote to memory of 4700	3208	2024-02-17_012a829896000de1b5f5f3c3174614df_cryptolocker.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-02-17_012a829896000de1b5f5f3c3174614df_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-17_012a829896000de1b5f5f3c3174614df_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3208
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4700

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
81KB

MD5
0516c610ce8edc1f5213cc536c70a339

SHA1
56b6aa65eb01a3adb299b5bf5089c04dd15e0764

SHA256
8202c5f657103fbf6b738f2ecfd60827474e5e7441c0d100f11b2aade6b95d28

SHA512
232a4f914db852b7808654e4742f767b6998aecd0829372944decb4fb9ccd4458e8aa1ee364205f293a508fc2fc04da24ebe41ef910ce48c25b32a3d7aa25f1c

Download Submit
memory/3208-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3208-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3208-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3208-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/3208-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4700-19-0x0000000002110000-0x0000000002116000-memory.dmp

Filesize
24KB

Download
memory/4700-21-0x0000000000560000-0x0000000000566000-memory.dmp

Filesize
24KB

Download
memory/4700-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download