9bd7b28fa13b0f238133fb3a6c9065fd61acbe806e11976971f7ac2c92876b10

Analysis

max time kernel
134s
max time network
124s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
27/05/2024, 04:23

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General

Target

2024-05-27_052663c3d31dcc199baa233a47993b07_cryptolocker.exe
Size

57KB
MD5

052663c3d31dcc199baa233a47993b07
SHA1

7f58c64d0473f322de37fe32e48cab3a2bad1430
SHA256

9bd7b28fa13b0f238133fb3a6c9065fd61acbe806e11976971f7ac2c92876b10
SHA512

9787ad61bf09343dd03bb7eef3412125c0c8402ddcd58302ecb86f5d5f4762a281413000f057e2185c865d63637a0af4f1449a3a7814481c69398a7f9ffdc666
SSDEEP

768:bP9g/WItCSsAfFaeOcfXVr3BPOz5CFBmNuFgUjlgzCW:bP9g/xtCS3Dxx0nCW

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 3 IoCs

resource	yara_rule
behavioral2/memory/1660-0-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000900000002328e-13.dat	CryptoLocker_rule2
behavioral2/memory/2372-19-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 3 IoCs

resource	yara_rule
behavioral2/memory/1660-0-0x0000000000400000-0x000000000040E000-memory.dmp	UPX
behavioral2/files/0x000900000002328e-13.dat	UPX
behavioral2/memory/2372-19-0x0000000000400000-0x000000000040E000-memory.dmp	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	2024-05-27_052663c3d31dcc199baa233a47993b07_cryptolocker.exe
Key value queried	\REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation	gewos.exe

Executes dropped EXE 1 IoCs

pid	Process
2372	gewos.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1660-0-0x0000000000400000-0x000000000040E000-memory.dmp	upx
behavioral2/files/0x000900000002328e-13.dat	upx
behavioral2/memory/2372-19-0x0000000000400000-0x000000000040E000-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 1660 wrote to memory of 2372	1660	2024-05-27_052663c3d31dcc199baa233a47993b07_cryptolocker.exe	82
PID 1660 wrote to memory of 2372	1660	2024-05-27_052663c3d31dcc199baa233a47993b07_cryptolocker.exe	82
PID 1660 wrote to memory of 2372	1660	2024-05-27_052663c3d31dcc199baa233a47993b07_cryptolocker.exe	82

C:\Users\Admin\AppData\Local\Temp\2024-05-27_052663c3d31dcc199baa233a47993b07_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-27_052663c3d31dcc199baa233a47993b07_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1660
- 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:2372

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
57KB

MD5
994fa4f3e09d47f9771cc8d2ae73a17a

SHA1
330cbba580303f35aa63016f660789efd0b81b99

SHA256
4780ce5b68146c7721696b1c77c0be7443ddad585e3b0c5824258a020bfafcef

SHA512
08cf4a8a7b1e3772803661ea30e67d6ce53fee806c2fbaa71f9ad39d85256cb88f64d1e15d7b3a560249f3f1c46acc59235d68375f692eee978851f7b90b242e

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

Filesize
185B

MD5
f595292bb267bd0884ba9fa55995477d

SHA1
b71e6b46ebbd85649f7aeed9fe02804846d72fe0

SHA256
efa6ac7d15d6ce490bcaa37d5dcfc2092af28da2f11ce0cbd99916f63e844d1e

SHA512
aaae993bd4fb32ab50c95ec521189e39712aee26558f8c0e21a99cbd0682906f17cb48b760cbda2a6e1680e66c87b7eab845e287e490e85dd7f4be92ce549621

Download Submit
memory/1660-0-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/1660-1-0x0000000002090000-0x0000000002096000-memory.dmp

Filesize
24KB

Download
memory/1660-2-0x0000000002090000-0x0000000002096000-memory.dmp

Filesize
24KB

Download
memory/1660-3-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2372-19-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2372-27-0x00000000021C0000-0x00000000021C6000-memory.dmp

Filesize
24KB

Download