9cfc88636e077430af2d6955dedce8d977898b061b4791baa8279ee97810f5b5

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
11-05-2024 05:23

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General

Target

2024-05-11_02cb93c67cc6a618c7cfcba615c2fe4a_cryptolocker.exe
Size

56KB
MD5

02cb93c67cc6a618c7cfcba615c2fe4a
SHA1

85d9978faf0e7c2fc201ce321d158d3bf795479e
SHA256

9cfc88636e077430af2d6955dedce8d977898b061b4791baa8279ee97810f5b5
SHA512

16f169f6fe0f129db4f984eb9f0ee799906da4f0e93fdd1e0dd3c1b01eadd9cb7a1642f8a64122c7418119330eb98dd97876a4d8600b0bd45eb04bc442fe0b34
SSDEEP

768:bP9g/WItCSsAfFaeOcfXVr3BPOz5CFBmNuFgUjlugJA:bP9g/xtCS3Dxx0eA

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 2 IoCs

resource	yara_rule
behavioral2/memory/1380-0-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0009000000023306-13.dat	CryptoLocker_rule2

UPX dump on OEP (original entry point) 2 IoCs

resource	yara_rule
behavioral2/memory/1380-0-0x0000000000400000-0x000000000040E000-memory.dmp	UPX
behavioral2/files/0x0009000000023306-13.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-1-5-21-3571316656-3665257725-2415531812-1000\Control Panel\International\Geo\Nation	2024-05-11_02cb93c67cc6a618c7cfcba615c2fe4a_cryptolocker.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3571316656-3665257725-2415531812-1000\Control Panel\International\Geo\Nation	gewos.exe

Executes dropped EXE 1 IoCs

pid	Process
3564	gewos.exe

UPX packed file 2 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1380-0-0x0000000000400000-0x000000000040E000-memory.dmp	upx
behavioral2/files/0x0009000000023306-13.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 1380 wrote to memory of 3564	1380	2024-05-11_02cb93c67cc6a618c7cfcba615c2fe4a_cryptolocker.exe	85
PID 1380 wrote to memory of 3564	1380	2024-05-11_02cb93c67cc6a618c7cfcba615c2fe4a_cryptolocker.exe	85
PID 1380 wrote to memory of 3564	1380	2024-05-11_02cb93c67cc6a618c7cfcba615c2fe4a_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-05-11_02cb93c67cc6a618c7cfcba615c2fe4a_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-11_02cb93c67cc6a618c7cfcba615c2fe4a_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1380
- 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:3564

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
fa5f2cdbd2c89f8c8f28b3b4b11a0257

SHA1
856676be16fb0a2032a87e23ae17b837e2cbef7d

SHA256
c3c79a3fd275f619c0ee537470c8f73868443fc1395f7099d3d2cdcacf262661

SHA512
c43e9cee50552d72bdd48977fac7b5d6654f0715164c98b0ee46dc5312593ef1ec2b884e1f44b465b34e726db93416c8b44bdaf7134eefbda28f3a60dbb9a976

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

Filesize
185B

MD5
4b9ea018c91fe0ef885cce906f6191a3

SHA1
16b765d1261cbd8ab52cd7098e8f5e946b2fb2f0

SHA256
8b90e6f7b6b34e0e2f3601a396ee28bb2612daf8134599b3ea79edf42b61247d

SHA512
032fb4ce2e112a94eb4ec7210e279166e3c217f56f5222834fd353bf58f9c6d1c9a66bd5a5610d5c43051e5a32dd3922df0b243dfae1d898b1b363e5e14c01e0

Download Submit
memory/1380-0-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/1380-1-0x0000000002120000-0x0000000002126000-memory.dmp

Filesize
24KB

Download
memory/1380-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/1380-9-0x0000000002120000-0x0000000002126000-memory.dmp

Filesize
24KB

Download
memory/3564-26-0x0000000001FA0000-0x0000000001FA6000-memory.dmp

Filesize
24KB

Download