e69e0daf9f2da76d1cdd6610b4bcd33256bdda5a8def98f5abd120357f2311e3

Analysis

max time kernel
150s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
30/04/2024, 02:57

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General

Target

2024-04-30_cfdb739b444b731f0e14914c2de6cc57_cryptolocker.exe
Size

55KB
MD5

cfdb739b444b731f0e14914c2de6cc57
SHA1

0fd4decf291cd5a8f81687817f92c37bd88c217c
SHA256

e69e0daf9f2da76d1cdd6610b4bcd33256bdda5a8def98f5abd120357f2311e3
SHA512

158f34cb3b967a990a14cc173c85aa8685e9b6a07c44ae8571d5c7aa052c0876f12ed484bd2d05a4c73606ac83dab00ca4a93e85980079432c3e38e236763abb
SSDEEP

768:bP9g/WItCSsAfFaeOcfXVr3BPOz5CFBmNuFgUjlbU:bP9g/xtCS3Dxx0AU

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 3 IoCs

resource	yara_rule
behavioral2/memory/1004-0-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000d000000023b2e-13.dat	CryptoLocker_rule2
behavioral2/memory/2904-19-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 3 IoCs

resource	yara_rule
behavioral2/memory/1004-0-0x0000000000400000-0x000000000040E000-memory.dmp	UPX
behavioral2/files/0x000d000000023b2e-13.dat	UPX
behavioral2/memory/2904-19-0x0000000000400000-0x000000000040E000-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-1-5-21-3726321484-1950364574-433157660-1000\Control Panel\International\Geo\Nation	2024-04-30_cfdb739b444b731f0e14914c2de6cc57_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2904	gewos.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1004-0-0x0000000000400000-0x000000000040E000-memory.dmp	upx
behavioral2/files/0x000d000000023b2e-13.dat	upx
behavioral2/memory/2904-19-0x0000000000400000-0x000000000040E000-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 1004 wrote to memory of 2904	1004	2024-04-30_cfdb739b444b731f0e14914c2de6cc57_cryptolocker.exe	85
PID 1004 wrote to memory of 2904	1004	2024-04-30_cfdb739b444b731f0e14914c2de6cc57_cryptolocker.exe	85
PID 1004 wrote to memory of 2904	1004	2024-04-30_cfdb739b444b731f0e14914c2de6cc57_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-04-30_cfdb739b444b731f0e14914c2de6cc57_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-30_cfdb739b444b731f0e14914c2de6cc57_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1004
- C:\Users\Admin\AppData\Local\Temp\gewos.exe
  "C:\Users\Admin\AppData\Local\Temp\gewos.exe"
  2⤵
  - Executes dropped EXE
  PID:2904

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\gewos.exe

Filesize
56KB

MD5
5a91d0a19e319e8405e4788cb5b193ea

SHA1
4108afae18d5f795ad30e90e42c14326418b6454

SHA256
76e4c0ce45ed406a76b6a7fb1681e795187d63922c075117f254cbd52b437b27

SHA512
fd0be79b266bc4ef2a4da8db3ed84fc324df18d13fce07455a9a4c9db4b881d4e65d92206cf7636a306c1cf1076f3d044f13b6d62d2fff26ee21665cd85e6caf

Download Submit
memory/1004-0-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/1004-1-0x0000000002210000-0x0000000002216000-memory.dmp

Filesize
24KB

Download
memory/1004-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/1004-9-0x0000000002210000-0x0000000002216000-memory.dmp

Filesize
24KB

Download
memory/2904-19-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2904-21-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download