b29e6a05b575cd178894135f23aae6fc1b7bc3d38e9ff7feec3204516fc2aaa1

Analysis

max time kernel
150s
max time network
150s
platform
windows7_x64
resource
win7-20240508-en
resource tags

arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
submitted
11/05/2024, 07:50

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General

Target

2024-05-11_a4dfa67abec795a1242ce344e14cf7bf_cryptolocker.exe
Size

71KB
MD5

a4dfa67abec795a1242ce344e14cf7bf
SHA1

56edc4dca779f0f3fc363050e1e6ee661192bb00
SHA256

b29e6a05b575cd178894135f23aae6fc1b7bc3d38e9ff7feec3204516fc2aaa1
SHA512

8edcb3cfe1f5e7c50bd247880f240f841d01103d1da84a971264f17b374966d857e9e5b91ba509b9f2d067955654e0e3e56b665a526e5f3837d85947b561460f
SSDEEP

1536:nj+4zs2cPVhlMOtEvwDpj4H8u8rZVTs9IOz:C4Q2c94OtEvwDpj4H8zA

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/2228-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000c000000012286-11.dat	CryptoLocker_rule2
behavioral1/memory/2228-13-0x00000000028C0000-0x00000000028D0000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2228-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2808-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 2 IoCs

resource	yara_rule
behavioral1/memory/2228-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2808-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/2228-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x000c000000012286-11.dat	UPX
behavioral1/memory/2228-13-0x00000000028C0000-0x00000000028D0000-memory.dmp	UPX
behavioral1/memory/2228-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2808-26-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2808	misid.exe

Loads dropped DLL 1 IoCs

pid	Process
2228	2024-05-11_a4dfa67abec795a1242ce344e14cf7bf_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2228-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/files/0x000c000000012286-11.dat	upx
behavioral1/memory/2228-13-0x00000000028C0000-0x00000000028D0000-memory.dmp	upx
behavioral1/memory/2228-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2808-26-0x0000000000500000-0x0000000000510000-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 2228 wrote to memory of 2808	2228	2024-05-11_a4dfa67abec795a1242ce344e14cf7bf_cryptolocker.exe	28
PID 2228 wrote to memory of 2808	2228	2024-05-11_a4dfa67abec795a1242ce344e14cf7bf_cryptolocker.exe	28
PID 2228 wrote to memory of 2808	2228	2024-05-11_a4dfa67abec795a1242ce344e14cf7bf_cryptolocker.exe	28
PID 2228 wrote to memory of 2808	2228	2024-05-11_a4dfa67abec795a1242ce344e14cf7bf_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-05-11_a4dfa67abec795a1242ce344e14cf7bf_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-11_a4dfa67abec795a1242ce344e14cf7bf_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2228
- C:\Users\Admin\AppData\Local\Temp\misid.exe
  "C:\Users\Admin\AppData\Local\Temp\misid.exe"
  2⤵
  - Executes dropped EXE
  PID:2808

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\misid.exe

Filesize
71KB

MD5
b504d3ec0db5b53f6c27a2dcb59988b2

SHA1
0d0e7d29f20bfb2e892b686d4ba265706d9e8523

SHA256
ffc5e1a5684402ab7be950e3518b0a3ecf95ce77c4e049535870d6e1932a480b

SHA512
d0399dfcf8c5a222c77fad3d3036fa47ffcf0a5d378a973cbf6542ca913c5838fbc6cfd0f0cbcd3b13b705a188c92bacd00b612164616e5fc562e99b5ec3424e

Download Submit
memory/2228-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2228-1-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/2228-2-0x00000000004B0000-0x00000000004B6000-memory.dmp

Filesize
24KB

Download
memory/2228-9-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/2228-13-0x00000000028C0000-0x00000000028D0000-memory.dmp

Filesize
64KB

Download
memory/2228-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2808-19-0x0000000000470000-0x0000000000476000-memory.dmp

Filesize
24KB

Download
memory/2808-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download