fb3cbf269693778726f3078f64d89ca1ffda2e41c8b276777102d54e048256fe

Analysis

max time kernel
93s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
19-06-2024 15:26

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General

Target

2024-06-19_1ab1b96c7077035658ad4349c8fc1cf9_cryptolocker.exe
Size

57KB
MD5

1ab1b96c7077035658ad4349c8fc1cf9
SHA1

de91018cf2340b488375e65919bae6c7347c6c4e
SHA256

fb3cbf269693778726f3078f64d89ca1ffda2e41c8b276777102d54e048256fe
SHA512

20f4a7a06ed4f749e76cf4ac4e414604d737976ec7c308f30eeabca7fffabe3f2aaca1a87556ff7b7571d4be4c7cf09dca19b837768adf8eb885740911a1831b
SSDEEP

768:bP9g/WItCSsAfFaeOcfXVr3BPOz5CFBmNuFgUjlbQ9mEh:bP9g/xtCS3Dxx0AQUm

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 3 IoCs

resource	yara_rule
behavioral2/memory/696-0-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000800000002343b-13.dat	CryptoLocker_rule2
behavioral2/memory/2124-18-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 3 IoCs

resource	yara_rule
behavioral2/memory/696-0-0x0000000000400000-0x000000000040E000-memory.dmp	UPX
behavioral2/files/0x000800000002343b-13.dat	UPX
behavioral2/memory/2124-18-0x0000000000400000-0x000000000040E000-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-1-5-21-2804150937-2146708401-419095071-1000\Control Panel\International\Geo\Nation	2024-06-19_1ab1b96c7077035658ad4349c8fc1cf9_cryptolocker.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2804150937-2146708401-419095071-1000\Control Panel\International\Geo\Nation	gewos.exe

Executes dropped EXE 1 IoCs

pid	Process
2124	gewos.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral2/memory/696-0-0x0000000000400000-0x000000000040E000-memory.dmp	upx
behavioral2/files/0x000800000002343b-13.dat	upx
behavioral2/memory/2124-18-0x0000000000400000-0x000000000040E000-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 696 wrote to memory of 2124	696	2024-06-19_1ab1b96c7077035658ad4349c8fc1cf9_cryptolocker.exe	82
PID 696 wrote to memory of 2124	696	2024-06-19_1ab1b96c7077035658ad4349c8fc1cf9_cryptolocker.exe	82
PID 696 wrote to memory of 2124	696	2024-06-19_1ab1b96c7077035658ad4349c8fc1cf9_cryptolocker.exe	82

C:\Users\Admin\AppData\Local\Temp\2024-06-19_1ab1b96c7077035658ad4349c8fc1cf9_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-19_1ab1b96c7077035658ad4349c8fc1cf9_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:696
- 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:2124

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
9827cddf884548a46e8b4dc7e26450e1

SHA1
ed5b4bca401abebadf8516d3d12dc62726f89071

SHA256
64d5f849d7bcf740aeb52c05081f2572f4267d1c96db24879bf65f9190e72bf4

SHA512
940ac03ae5364a35e124d0fda5bd4256509b68a789300438f895db543147ac42e57245835525d9634b7133535ee4e54015b6077f5b65427d9b924dd926eabe96

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

Filesize
185B

MD5
d129acf518d9492644e43061740ffce2

SHA1
a82c6876bed5d5d098290784e6f29f8efef1b9a1

SHA256
b5db973539cb3fd55f293ba1780addb35b0e51688457adfabde3a47ae566ef59

SHA512
4153d6d2f40acf907ff8da2aa6b1f98155a5b8a957f5a367fc889f6659d2adf6bc9954258ff7f0a008ba627b90e68bb1f9fdb651ce8112ae60ac6b8eff8b9858

Download Submit
memory/696-0-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/696-1-0x00000000021E0000-0x00000000021E6000-memory.dmp

Filesize
24KB

Download
memory/696-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/696-9-0x00000000021E0000-0x00000000021E6000-memory.dmp

Filesize
24KB

Download
memory/2124-18-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2124-27-0x0000000002150000-0x0000000002156000-memory.dmp

Filesize
24KB

Download