90f9f4038be6bc33eb3cb19aca8767dd0c19421d4db190bc8bc111b5805ba1f9

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
01/05/2024, 05:16

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General

Target

2024-05-01_cd09f70ca2ec941e1d2f9558041fdf4d_cryptolocker.exe
Size

55KB
MD5

cd09f70ca2ec941e1d2f9558041fdf4d
SHA1

c36c6f46c42a3900b0b179e03be82657106f0d36
SHA256

90f9f4038be6bc33eb3cb19aca8767dd0c19421d4db190bc8bc111b5805ba1f9
SHA512

c4447e3ddd7de4420a944a6f0bb8dd66d727288b433b6f7c08f75e80f9c8445b9bdf4126d4732138bc29ea2b6c5b1c5ca03021281e183661c0afe99fd62eb97a
SSDEEP

768:bP9g/WItCSsAfFaeOcfXVr3BPOz5CFBmNuFgUjl9x:bP9g/xtCS3Dxx0w

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 2 IoCs

resource	yara_rule
behavioral2/memory/4040-0-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000c000000023b5f-13.dat	CryptoLocker_rule2

UPX dump on OEP (original entry point) 2 IoCs

resource	yara_rule
behavioral2/memory/4040-0-0x0000000000400000-0x000000000040E000-memory.dmp	UPX
behavioral2/files/0x000c000000023b5f-13.dat	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-1-5-21-877519540-908060166-1852957295-1000\Control Panel\International\Geo\Nation	2024-05-01_cd09f70ca2ec941e1d2f9558041fdf4d_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2600	gewos.exe

UPX packed file 2 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4040-0-0x0000000000400000-0x000000000040E000-memory.dmp	upx
behavioral2/files/0x000c000000023b5f-13.dat	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 4040 wrote to memory of 2600	4040	2024-05-01_cd09f70ca2ec941e1d2f9558041fdf4d_cryptolocker.exe	83
PID 4040 wrote to memory of 2600	4040	2024-05-01_cd09f70ca2ec941e1d2f9558041fdf4d_cryptolocker.exe	83
PID 4040 wrote to memory of 2600	4040	2024-05-01_cd09f70ca2ec941e1d2f9558041fdf4d_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-05-01_cd09f70ca2ec941e1d2f9558041fdf4d_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-01_cd09f70ca2ec941e1d2f9558041fdf4d_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4040
- C:\Users\Admin\AppData\Local\Temp\gewos.exe
  "C:\Users\Admin\AppData\Local\Temp\gewos.exe"
  2⤵
  - Executes dropped EXE
  PID:2600

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
55KB

MD5
0b41282d7a93103841964da13dd44153

SHA1
5c107c919067ff4c8aec7a0f0aac7ed0c7a5d227

SHA256
e18f13867818a6a60538c642064a62cdc8e3cf8ddeec9df2d56ae02643758063

SHA512
2220f3f52a3da074a9ca6c5c563991a73cbf603449c5f22b698d6d1211a06c42c27d68a6978581e2a00d31eb50a86156ebe9043aa865f1c22b923d442424498d

Download Submit
memory/2600-26-0x0000000002010000-0x0000000002016000-memory.dmp

Filesize
24KB

Download
memory/4040-0-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/4040-1-0x0000000002200000-0x0000000002206000-memory.dmp

Filesize
24KB

Download
memory/4040-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/4040-9-0x0000000002200000-0x0000000002206000-memory.dmp

Filesize
24KB

Download