6f033527029f357c7e0cd6e38a04dcbbb06e4e0c255700e150089e220c1ed9b9

Analysis

max time kernel
113s
max time network
148s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
15/04/2024, 15:04

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General

Target

2024-04-15_cf38fd8a2c02208aac88a637c2f1d31c_cryptolocker.exe
Size

54KB
MD5

cf38fd8a2c02208aac88a637c2f1d31c
SHA1

13ca54a0fdff2a97f330159421bdeb29e5cb1e6e
SHA256

6f033527029f357c7e0cd6e38a04dcbbb06e4e0c255700e150089e220c1ed9b9
SHA512

08cbb18428fc91c39eed719c3c5d27819e660f6193e0ab3de90fe52130be7fe50b05f4b5afc8381b57c624f79e3cc98ff72ec506f44cce2c7f92a371126b7b38
SSDEEP

768:bP9g/WItCSsAfFaeOcfXVr3BPOz5CFBmNuFgUL7:bP9g/xtCS3Dxx0G

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 2 IoCs

resource	yara_rule
behavioral2/memory/2148-0-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0008000000023245-14.dat	CryptoLocker_rule2

UPX dump on OEP (original entry point) 2 IoCs

resource	yara_rule
behavioral2/memory/2148-0-0x0000000000400000-0x000000000040E000-memory.dmp	UPX
behavioral2/files/0x0008000000023245-14.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-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	2024-04-15_cf38fd8a2c02208aac88a637c2f1d31c_cryptolocker.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	gewos.exe

Executes dropped EXE 1 IoCs

pid	Process
4212	gewos.exe

UPX packed file 2 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2148-0-0x0000000000400000-0x000000000040E000-memory.dmp	upx
behavioral2/files/0x0008000000023245-14.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 2148 wrote to memory of 4212	2148	2024-04-15_cf38fd8a2c02208aac88a637c2f1d31c_cryptolocker.exe	90
PID 2148 wrote to memory of 4212	2148	2024-04-15_cf38fd8a2c02208aac88a637c2f1d31c_cryptolocker.exe	90
PID 2148 wrote to memory of 4212	2148	2024-04-15_cf38fd8a2c02208aac88a637c2f1d31c_cryptolocker.exe	90

C:\Users\Admin\AppData\Local\Temp\2024-04-15_cf38fd8a2c02208aac88a637c2f1d31c_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-15_cf38fd8a2c02208aac88a637c2f1d31c_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2148
- 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:4212

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=3984 --field-trial-handle=2244,i,11878111470816612087,2265290141962607370,262144 --variations-seed-version /prefetch:8
1⤵
PID:984

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
54KB

MD5
66c3c918a57e77cf266bb370f0319be8

SHA1
73cc9e19504f73d7be81cfd5b0d0e4554ce57436

SHA256
31c70e6c995886cb030c2aefab972b49c1acbbbb393585b3075e5f5141f7be3c

SHA512
ada84ef0e04c38c4a7e588af24a6658327e3d8236249c2092fa869be41e087e869d6900bc65b5b3aaf926d87b9456b426a32d2133e6a67eefb7f7fcf8b3f5126

Download Submit
memory/2148-0-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2148-1-0x0000000002250000-0x0000000002256000-memory.dmp

Filesize
24KB

Download
memory/2148-2-0x0000000002250000-0x0000000002256000-memory.dmp

Filesize
24KB

Download
memory/2148-3-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/4212-20-0x0000000002210000-0x0000000002216000-memory.dmp

Filesize
24KB

Download