90f9f4038be6bc33eb3cb19aca8767dd0c19421d4db190bc8bc111b5805ba1f9

Analysis

max time kernel
117s
max time network
118s
platform
windows7_x64
resource
win7-20240419-en
resource tags

arch:x64arch:x86image:win7-20240419-enlocale:en-usos:windows7-x64system
submitted
01/05/2024, 05:16

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General

Target

2024-05-01_cd09f70ca2ec941e1d2f9558041fdf4d_cryptolocker.exe
Size

55KB
MD5

cd09f70ca2ec941e1d2f9558041fdf4d
SHA1

c36c6f46c42a3900b0b179e03be82657106f0d36
SHA256

90f9f4038be6bc33eb3cb19aca8767dd0c19421d4db190bc8bc111b5805ba1f9
SHA512

c4447e3ddd7de4420a944a6f0bb8dd66d727288b433b6f7c08f75e80f9c8445b9bdf4126d4732138bc29ea2b6c5b1c5ca03021281e183661c0afe99fd62eb97a
SSDEEP

768:bP9g/WItCSsAfFaeOcfXVr3BPOz5CFBmNuFgUjl9x:bP9g/xtCS3Dxx0w

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 3 IoCs

resource	yara_rule
behavioral1/memory/1752-0-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000d000000012279-11.dat	CryptoLocker_rule2
behavioral1/memory/2836-16-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 3 IoCs

resource	yara_rule
behavioral1/memory/1752-0-0x0000000000400000-0x000000000040E000-memory.dmp	UPX
behavioral1/files/0x000d000000012279-11.dat	UPX
behavioral1/memory/2836-16-0x0000000000400000-0x000000000040E000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2836	gewos.exe

Loads dropped DLL 1 IoCs

pid	Process
1752	2024-05-01_cd09f70ca2ec941e1d2f9558041fdf4d_cryptolocker.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1752-0-0x0000000000400000-0x000000000040E000-memory.dmp	upx
behavioral1/files/0x000d000000012279-11.dat	upx
behavioral1/memory/2836-16-0x0000000000400000-0x000000000040E000-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
1752	2024-05-01_cd09f70ca2ec941e1d2f9558041fdf4d_cryptolocker.exe
2836	gewos.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1752 wrote to memory of 2836	1752	2024-05-01_cd09f70ca2ec941e1d2f9558041fdf4d_cryptolocker.exe	28
PID 1752 wrote to memory of 2836	1752	2024-05-01_cd09f70ca2ec941e1d2f9558041fdf4d_cryptolocker.exe	28
PID 1752 wrote to memory of 2836	1752	2024-05-01_cd09f70ca2ec941e1d2f9558041fdf4d_cryptolocker.exe	28
PID 1752 wrote to memory of 2836	1752	2024-05-01_cd09f70ca2ec941e1d2f9558041fdf4d_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-05-01_cd09f70ca2ec941e1d2f9558041fdf4d_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-01_cd09f70ca2ec941e1d2f9558041fdf4d_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:1752
- 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:2836

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
55KB

MD5
0b41282d7a93103841964da13dd44153

SHA1
5c107c919067ff4c8aec7a0f0aac7ed0c7a5d227

SHA256
e18f13867818a6a60538c642064a62cdc8e3cf8ddeec9df2d56ae02643758063

SHA512
2220f3f52a3da074a9ca6c5c563991a73cbf603449c5f22b698d6d1211a06c42c27d68a6978581e2a00d31eb50a86156ebe9043aa865f1c22b923d442424498d

Download Submit
memory/1752-0-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/1752-1-0x00000000003C0000-0x00000000003C6000-memory.dmp

Filesize
24KB

Download
memory/1752-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/1752-9-0x00000000003C0000-0x00000000003C6000-memory.dmp

Filesize
24KB

Download
memory/2836-16-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2836-18-0x0000000000390000-0x0000000000396000-memory.dmp

Filesize
24KB

Download