8a2876616c613fc35ce8f1e3f83947c7dfd1fc0d5ff6db9677fe4fd60646aa05

Analysis

max time kernel
121s
max time network
125s
platform
windows7_x64
resource
win7-20240215-en
resource tags

arch:x64arch:x86image:win7-20240215-enlocale:en-usos:windows7-x64system
submitted
21-05-2024 20:55

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General

Target

2024-05-21_8532875c0a005085dccd2eeab2f923d6_cryptolocker.exe
Size

57KB
MD5

8532875c0a005085dccd2eeab2f923d6
SHA1

e36998994c5161e2d37dd88210c90cb29e87e03a
SHA256

8a2876616c613fc35ce8f1e3f83947c7dfd1fc0d5ff6db9677fe4fd60646aa05
SHA512

bf49a08ebebafa1f69a2a1977d4668c82ced0d947a1c518a033a2fb7de382d6441a49d012bf4cb28b0f411a6612c6a20c1aaac52bcb3af442a0175d2f8fc6b47
SSDEEP

768:bP9g/WItCSsAfFaeOcfXVr3BPOz5CFBmNuFgUjlbQ9mER:bP9g/xtCS3Dxx0AQUO

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 2 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2956-0-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2
\Users\Admin\AppData\Local\Temp\gewos.exe	CryptoLocker_rule2

UPX dump on OEP (original entry point) 2 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2956-0-0x0000000000400000-0x000000000040E000-memory.dmp	UPX
\Users\Admin\AppData\Local\Temp\gewos.exe	UPX

Executes dropped EXE 1 IoCs

Processes:

gewos.exe

pid process

1288 gewos.exe
Loads dropped DLL 1 IoCs

Processes:

2024-05-21_8532875c0a005085dccd2eeab2f923d6_cryptolocker.exe

pid process

2956 2024-05-21_8532875c0a005085dccd2eeab2f923d6_cryptolocker.exe

pid	process
1288	gewos.exe

pid	process
2956	2024-05-21_8532875c0a005085dccd2eeab2f923d6_cryptolocker.exe

UPX packed file 2 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/2956-0-0x0000000000400000-0x000000000040E000-memory.dmp	upx
\Users\Admin\AppData\Local\Temp\gewos.exe	upx

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
Suspicious use of UnmapMainImage 2 IoCs

Processes:

2024-05-21_8532875c0a005085dccd2eeab2f923d6_cryptolocker.exegewos.exe

pid process

2956 2024-05-21_8532875c0a005085dccd2eeab2f923d6_cryptolocker.exe
1288 gewos.exe

pid	process
2956	2024-05-21_8532875c0a005085dccd2eeab2f923d6_cryptolocker.exe
1288	gewos.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

2024-05-21_8532875c0a005085dccd2eeab2f923d6_cryptolocker.exe

description	pid	process	target process
PID 2956 wrote to memory of 1288	2956	2024-05-21_8532875c0a005085dccd2eeab2f923d6_cryptolocker.exe	gewos.exe
PID 2956 wrote to memory of 1288	2956	2024-05-21_8532875c0a005085dccd2eeab2f923d6_cryptolocker.exe	gewos.exe
PID 2956 wrote to memory of 1288	2956	2024-05-21_8532875c0a005085dccd2eeab2f923d6_cryptolocker.exe	gewos.exe
PID 2956 wrote to memory of 1288	2956	2024-05-21_8532875c0a005085dccd2eeab2f923d6_cryptolocker.exe	gewos.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-21_8532875c0a005085dccd2eeab2f923d6_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-21_8532875c0a005085dccd2eeab2f923d6_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:2956

C:\Users\Admin\AppData\Local\Temp\gewos.exe
"C:\Users\Admin\AppData\Local\Temp\gewos.exe"
2⤵
- Executes dropped EXE
- Suspicious use of UnmapMainImage
PID:1288

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

\Users\Admin\AppData\Local\Temp\gewos.exe

Filesize
57KB

MD5
23656322d7227d9b038c7d7d3d8920f7

SHA1
3c106f84723c4727f43b5ab43f74cc1bf84a401c

SHA256
ee0d67d39b1834df3c012ff3a9dff7ed5a2c18d8b075aba79b6d5dd78aee33d1

SHA512
e8decb93e1918ef2e5eadcedff9aa44c2ce638ce0d56ff3b9a68499d0e44990e88d8bf727fad52704731eb42176c58d8e40f172f7426267e71124d5ddad86174

Download Submit
memory/1288-24-0x0000000000380000-0x0000000000386000-memory.dmp

Filesize
24KB

Download
memory/2956-0-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2956-1-0x0000000000280000-0x0000000000286000-memory.dmp

Filesize
24KB

Download
memory/2956-2-0x0000000000280000-0x0000000000286000-memory.dmp

Filesize
24KB

Download
memory/2956-3-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download