cc36de26034bc86a81559792bde7ac79e50109d95ed25aecf33fe52a5d8b9b74

Analysis

max time kernel
148s
max time network
156s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
23/04/2024, 04:51

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General

Target

2024-04-23_afe1e1ed3c84be3a89a5c4d3d6156135_cryptolocker.exe
Size

32KB
MD5

afe1e1ed3c84be3a89a5c4d3d6156135
SHA1

8e616e2698d5f82f98c3dbb7b0e592d2d2d74dae
SHA256

cc36de26034bc86a81559792bde7ac79e50109d95ed25aecf33fe52a5d8b9b74
SHA512

b50be443177d18da8d9dfa7b46c75bd820ea3ab8d47c33390ef6102e7cbf4935ab918c3b15c6eebab0b28653a5a11efe6a2eddf7a05c9100c088335adb04ba7d
SSDEEP

768:bFPm5zusFUB2preAr+Ofjg0S16avdrQFiLjJvt+:bFPmpiif/oc+v+

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/2656-0-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000d00000001224c-11.dat	CryptoLocker_rule2
behavioral1/memory/2656-15-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2632-17-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2632-26-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/2656-0-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
behavioral1/files/0x000d00000001224c-11.dat	UPX
behavioral1/memory/2656-15-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
behavioral1/memory/2632-17-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
behavioral1/memory/2632-26-0x0000000008000000-0x000000000800E000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2632	lossy.exe

Loads dropped DLL 1 IoCs

pid	Process
2656	2024-04-23_afe1e1ed3c84be3a89a5c4d3d6156135_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2656-0-0x0000000008000000-0x000000000800E000-memory.dmp	upx
behavioral1/files/0x000d00000001224c-11.dat	upx
behavioral1/memory/2656-15-0x0000000008000000-0x000000000800E000-memory.dmp	upx
behavioral1/memory/2632-17-0x0000000008000000-0x000000000800E000-memory.dmp	upx
behavioral1/memory/2632-26-0x0000000008000000-0x000000000800E000-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 4 IoCs

description	pid	Process	procid_target
PID 2656 wrote to memory of 2632	2656	2024-04-23_afe1e1ed3c84be3a89a5c4d3d6156135_cryptolocker.exe	28
PID 2656 wrote to memory of 2632	2656	2024-04-23_afe1e1ed3c84be3a89a5c4d3d6156135_cryptolocker.exe	28
PID 2656 wrote to memory of 2632	2656	2024-04-23_afe1e1ed3c84be3a89a5c4d3d6156135_cryptolocker.exe	28
PID 2656 wrote to memory of 2632	2656	2024-04-23_afe1e1ed3c84be3a89a5c4d3d6156135_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-04-23_afe1e1ed3c84be3a89a5c4d3d6156135_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-23_afe1e1ed3c84be3a89a5c4d3d6156135_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2656
- C:\Users\Admin\AppData\Local\Temp\lossy.exe
  "C:\Users\Admin\AppData\Local\Temp\lossy.exe"
  2⤵
  - Executes dropped EXE
  PID:2632

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\lossy.exe

Filesize
32KB

MD5
8b7fc537d2076f27db6daf2e6a5ed377

SHA1
f2e6637867a992aad7796a40fdafc646f690f4ff

SHA256
f2848d84a5d997bc369df269e1eaea2e7a79121ebc9c69a5847df0eb2249ac71

SHA512
d0822593307c5811480a8dd1d9994c81e0df4c725a52af4552c4b0e96a9eda35997f6b342afa887948be858a4f6343d8583965d6d00d1db57e731bb6849e4f9a

Download Submit
memory/2632-17-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/2632-18-0x00000000004B0000-0x00000000004B6000-memory.dmp

Filesize
24KB

Download
memory/2632-19-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/2632-26-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/2656-0-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/2656-1-0x0000000000520000-0x0000000000526000-memory.dmp

Filesize
24KB

Download
memory/2656-2-0x0000000000590000-0x0000000000596000-memory.dmp

Filesize
24KB

Download
memory/2656-3-0x0000000000520000-0x0000000000526000-memory.dmp

Filesize
24KB

Download
memory/2656-15-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download