e69e0daf9f2da76d1cdd6610b4bcd33256bdda5a8def98f5abd120357f2311e3

Analysis

max time kernel
120s
max time network
120s
platform
windows7_x64
resource
win7-20240419-en
resource tags

arch:x64arch:x86image:win7-20240419-enlocale:en-usos:windows7-x64system
submitted
30/04/2024, 02:57

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General

Target

2024-04-30_cfdb739b444b731f0e14914c2de6cc57_cryptolocker.exe
Size

55KB
MD5

cfdb739b444b731f0e14914c2de6cc57
SHA1

0fd4decf291cd5a8f81687817f92c37bd88c217c
SHA256

e69e0daf9f2da76d1cdd6610b4bcd33256bdda5a8def98f5abd120357f2311e3
SHA512

158f34cb3b967a990a14cc173c85aa8685e9b6a07c44ae8571d5c7aa052c0876f12ed484bd2d05a4c73606ac83dab00ca4a93e85980079432c3e38e236763abb
SSDEEP

768:bP9g/WItCSsAfFaeOcfXVr3BPOz5CFBmNuFgUjlbU:bP9g/xtCS3Dxx0AU

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 3 IoCs

resource	yara_rule
behavioral1/memory/2284-0-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000b000000012301-11.dat	CryptoLocker_rule2
behavioral1/memory/2040-16-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 3 IoCs

resource	yara_rule
behavioral1/memory/2284-0-0x0000000000400000-0x000000000040E000-memory.dmp	UPX
behavioral1/files/0x000b000000012301-11.dat	UPX
behavioral1/memory/2040-16-0x0000000000400000-0x000000000040E000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2040	gewos.exe

Loads dropped DLL 1 IoCs

pid	Process
2284	2024-04-30_cfdb739b444b731f0e14914c2de6cc57_cryptolocker.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2284-0-0x0000000000400000-0x000000000040E000-memory.dmp	upx
behavioral1/files/0x000b000000012301-11.dat	upx
behavioral1/memory/2040-16-0x0000000000400000-0x000000000040E000-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 UnmapMainImage 2 IoCs

pid	Process
2284	2024-04-30_cfdb739b444b731f0e14914c2de6cc57_cryptolocker.exe
2040	gewos.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2284 wrote to memory of 2040	2284	2024-04-30_cfdb739b444b731f0e14914c2de6cc57_cryptolocker.exe	28
PID 2284 wrote to memory of 2040	2284	2024-04-30_cfdb739b444b731f0e14914c2de6cc57_cryptolocker.exe	28
PID 2284 wrote to memory of 2040	2284	2024-04-30_cfdb739b444b731f0e14914c2de6cc57_cryptolocker.exe	28
PID 2284 wrote to memory of 2040	2284	2024-04-30_cfdb739b444b731f0e14914c2de6cc57_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-04-30_cfdb739b444b731f0e14914c2de6cc57_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-30_cfdb739b444b731f0e14914c2de6cc57_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:2284
- 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:2040

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
56KB

MD5
5a91d0a19e319e8405e4788cb5b193ea

SHA1
4108afae18d5f795ad30e90e42c14326418b6454

SHA256
76e4c0ce45ed406a76b6a7fb1681e795187d63922c075117f254cbd52b437b27

SHA512
fd0be79b266bc4ef2a4da8db3ed84fc324df18d13fce07455a9a4c9db4b881d4e65d92206cf7636a306c1cf1076f3d044f13b6d62d2fff26ee21665cd85e6caf

Download Submit
memory/2040-16-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2040-25-0x0000000000350000-0x0000000000356000-memory.dmp

Filesize
24KB

Download
memory/2284-0-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2284-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2284-9-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/2284-1-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download