00a88796d29ddcac6f8bd319de2708d848015a15c5b7975efedbfe364225e620

Analysis

max time kernel
119s
max time network
123s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
03/05/2024, 21:25

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General

Target

2024-05-03_d4f12278dc2dd7e340bf76c0704deb20_cryptolocker.exe
Size

56KB
MD5

d4f12278dc2dd7e340bf76c0704deb20
SHA1

b4993832ec047451de543d500472faa3732983e8
SHA256

00a88796d29ddcac6f8bd319de2708d848015a15c5b7975efedbfe364225e620
SHA512

9008996d65824b32c96cd9b3e8278c0b5f0d062d9ff964f65e85df6f102df1f3803aa2bcee14f3d2329d882fed441507759eeb706d43a8af58789c14be29b515
SSDEEP

768:bP9g/WItCSsAfFaeOcfXVr3BPOz5CFBmNuFgUjl+R:bP9g/xtCS3Dxx0JR

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral1/memory/2292-0-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2744-17-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000d0000000122d1-16.dat	CryptoLocker_rule2
behavioral1/memory/2292-43-0x0000000002C10000-0x0000000002C1E000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 3 IoCs

resource	yara_rule
behavioral1/memory/2292-0-0x0000000000400000-0x000000000040E000-memory.dmp	UPX
behavioral1/memory/2744-17-0x0000000000400000-0x000000000040E000-memory.dmp	UPX
behavioral1/files/0x000d0000000122d1-16.dat	UPX

Executes dropped EXE 1 IoCs

pid	Process
2744	gewos.exe

Loads dropped DLL 1 IoCs

pid	Process
2292	2024-05-03_d4f12278dc2dd7e340bf76c0704deb20_cryptolocker.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2292-0-0x0000000000400000-0x000000000040E000-memory.dmp	upx
behavioral1/memory/2744-17-0x0000000000400000-0x000000000040E000-memory.dmp	upx
behavioral1/files/0x000d0000000122d1-16.dat	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
2292	2024-05-03_d4f12278dc2dd7e340bf76c0704deb20_cryptolocker.exe
2744	gewos.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2292 wrote to memory of 2744	2292	2024-05-03_d4f12278dc2dd7e340bf76c0704deb20_cryptolocker.exe	28
PID 2292 wrote to memory of 2744	2292	2024-05-03_d4f12278dc2dd7e340bf76c0704deb20_cryptolocker.exe	28
PID 2292 wrote to memory of 2744	2292	2024-05-03_d4f12278dc2dd7e340bf76c0704deb20_cryptolocker.exe	28
PID 2292 wrote to memory of 2744	2292	2024-05-03_d4f12278dc2dd7e340bf76c0704deb20_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-05-03_d4f12278dc2dd7e340bf76c0704deb20_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-03_d4f12278dc2dd7e340bf76c0704deb20_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:2292
- 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:2744

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

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

Filesize
56KB

MD5
89276edf94a9b21f73479bbc57ae9b21

SHA1
dd4642fb13d1f29ef19098f8222b21359bace134

SHA256
5e4d134348ba17f7149ceef6578e44329d698a160bc9545b1c8c3f13f33c4686

SHA512
9d49ff42399b3feaa42f27fa0f76aaa064ed5c4051eeb56d0c38b9f1d639e69e086daebf00fcc4735a9f18a5baeae833be044aea817f8ba41ca38edc51deecd1

Download Submit
memory/2292-0-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2292-9-0x0000000000320000-0x0000000000326000-memory.dmp

Filesize
24KB

Download
memory/2292-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2292-1-0x0000000000320000-0x0000000000326000-memory.dmp

Filesize
24KB

Download
memory/2292-15-0x0000000002C10000-0x0000000002C1E000-memory.dmp

Filesize
56KB

Download
memory/2292-43-0x0000000002C10000-0x0000000002C1E000-memory.dmp

Filesize
56KB

Download
memory/2744-17-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2744-19-0x0000000000260000-0x0000000000266000-memory.dmp

Filesize
24KB

Download