374e7f946f95e6f9b31ed2f7812a3c1aa6e9ed32451e217c238d49e216473c1d

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
14/05/2024, 04:30

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General

Target

2024-05-14_e20fe6abdf0133d294dea38809903220_cryptolocker.exe
Size

56KB
MD5

e20fe6abdf0133d294dea38809903220
SHA1

f0f35c0a4e200ec222209158f634a2d588e0f3f0
SHA256

374e7f946f95e6f9b31ed2f7812a3c1aa6e9ed32451e217c238d49e216473c1d
SHA512

c4dc65d7af84578a20809729a1e385f680d125ebcae94b7897ae09c4cae3ad8bcadf6237d82787dbacf692bba6ce11f197d1deffb7918f565152cb3bef6f8c75
SSDEEP

768:bP9g/WItCSsAfFaeOcfXVr3BPOz5CFBmNuFgUjlYR+:bP9g/xtCS3Dxx0LU

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 2 IoCs

resource	yara_rule
behavioral2/memory/5064-0-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000700000002328e-13.dat	CryptoLocker_rule2

UPX dump on OEP (original entry point) 2 IoCs

resource	yara_rule
behavioral2/memory/5064-0-0x0000000000400000-0x000000000040E000-memory.dmp	UPX
behavioral2/files/0x000700000002328e-13.dat	UPX

Checks computer location settings 2 TTPs 2 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-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation	gewos.exe
Key value queried	\REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation	2024-05-14_e20fe6abdf0133d294dea38809903220_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1452	gewos.exe

UPX packed file 2 IoCs

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

upx

resource	yara_rule
behavioral2/memory/5064-0-0x0000000000400000-0x000000000040E000-memory.dmp	upx
behavioral2/files/0x000700000002328e-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 5064 wrote to memory of 1452	5064	2024-05-14_e20fe6abdf0133d294dea38809903220_cryptolocker.exe	82
PID 5064 wrote to memory of 1452	5064	2024-05-14_e20fe6abdf0133d294dea38809903220_cryptolocker.exe	82
PID 5064 wrote to memory of 1452	5064	2024-05-14_e20fe6abdf0133d294dea38809903220_cryptolocker.exe	82

C:\Users\Admin\AppData\Local\Temp\2024-05-14_e20fe6abdf0133d294dea38809903220_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-14_e20fe6abdf0133d294dea38809903220_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:5064
- C:\Users\Admin\AppData\Local\Temp\gewos.exe
  "C:\Users\Admin\AppData\Local\Temp\gewos.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  PID:1452

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
b4070dfbc1847b0298886e0c41345671

SHA1
9b5127c80cdf6151bb50c718cf6b88a51c759963

SHA256
f5f9b0bcfde439ad59204a4aaa91e124ccef407242627b677a775b1608091cdf

SHA512
04b77e05040520085fb1452c24c0bdb490ddd98fb3d99fdaa432e31a0bfb983f1a084ede5ade2ea709c81976be96be5871e01838a567112123ee6b4bb7e2a363

Download Submit
C:\Users\Admin\AppData\Local\Temp\gewosik.exe

Filesize
185B

MD5
75cb925d64d1759ca80eb57b45114d5c

SHA1
3a4571ab944e8057766ec40fda459de005e45abe

SHA256
fe358f40665cc77959a0dde71e3f35787e6d4129ec17c0b2a28637162536adf7

SHA512
7c32458ce1351ce35ebd757a091db444d825495516a6a661ffcbfc3df113fbda5cdce694b78ebf08aec0ad96020351e54d9b6ecf27cdfe4ba708c183284e62fe

Download Submit
memory/1452-26-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/5064-0-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/5064-1-0x0000000002120000-0x0000000002126000-memory.dmp

Filesize
24KB

Download
memory/5064-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/5064-9-0x0000000002120000-0x0000000002126000-memory.dmp

Filesize
24KB

Download