f245184fb9c9b425f699ceb775d69d219b8d3ec7133021cb20846e48744e39a4

General

Target

2024-03-11_34513ccb609bdf021b1929df22c34df0_cryptolocker.exe
Size

65KB
MD5

34513ccb609bdf021b1929df22c34df0
SHA1

bf57f02d48b68e2c39764691d548324f3ea348db
SHA256

f245184fb9c9b425f699ceb775d69d219b8d3ec7133021cb20846e48744e39a4
SHA512

57a964dc6d1ed64609c259acd76680abc756029cad0a0214f2b930c0c5b0dc4d91c1a247d569343093da1b00c42b362500444f268088db0c6284ebb663ee820f
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjYjc3CB+:1nK6a+qdOOtEvwDpjs+

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 6 IoCs

resource	yara_rule
behavioral1/memory/2276-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000c000000012331-11.dat	CryptoLocker_rule2
behavioral1/memory/2276-15-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2860-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2276-13-0x0000000001E50000-0x0000000001E60000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2860-27-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 6 IoCs

resource	yara_rule
behavioral1/memory/2276-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000c000000012331-11.dat	CryptoLocker_set1
behavioral1/memory/2276-15-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/memory/2860-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/memory/2276-13-0x0000000001E50000-0x0000000001E60000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2860-27-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 6 IoCs

resource	yara_rule
behavioral1/memory/2276-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/files/0x000c000000012331-11.dat	UPX
behavioral1/memory/2276-15-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/memory/2860-17-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/memory/2276-13-0x0000000001E50000-0x0000000001E60000-memory.dmp	UPX
behavioral1/memory/2860-27-0x0000000000500000-0x000000000050F311-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2860	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2276	2024-03-11_34513ccb609bdf021b1929df22c34df0_cryptolocker.exe

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2276-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/files/0x000c000000012331-11.dat	upx
behavioral1/memory/2276-15-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/memory/2860-17-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/memory/2276-13-0x0000000001E50000-0x0000000001E60000-memory.dmp	upx
behavioral1/memory/2860-27-0x0000000000500000-0x000000000050F311-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 2276 wrote to memory of 2860	2276	2024-03-11_34513ccb609bdf021b1929df22c34df0_cryptolocker.exe	28
PID 2276 wrote to memory of 2860	2276	2024-03-11_34513ccb609bdf021b1929df22c34df0_cryptolocker.exe	28
PID 2276 wrote to memory of 2860	2276	2024-03-11_34513ccb609bdf021b1929df22c34df0_cryptolocker.exe	28
PID 2276 wrote to memory of 2860	2276	2024-03-11_34513ccb609bdf021b1929df22c34df0_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-03-11_34513ccb609bdf021b1929df22c34df0_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-11_34513ccb609bdf021b1929df22c34df0_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2276
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2860

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

\Users\Admin\AppData\Local\Temp\asih.exe

Filesize
65KB

MD5
1937945f628f26943e0f62fcd42f1398

SHA1
81faa5e7cef314403c71e36bcbc188cc7cea7e6b

SHA256
858f25d78f1d2dc7beaf339e3d0568f6987c0e6fdc5929d75e68774a66e3dd4b

SHA512
f72d1b8df0d3622d0e59b6ba83c0bb09bf1fbdd0880fb1057bc8d12c00e7a15ce8e6a110f1566718d57c5f7b161f441a9cb86cdf21d1bedcf819df6ed982bd05

Download Submit
memory/2276-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2276-1-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2276-2-0x0000000000280000-0x0000000000286000-memory.dmp

Filesize
24KB

Download
memory/2276-8-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2276-15-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2276-13-0x0000000001E50000-0x0000000001E60000-memory.dmp

Filesize
64KB

Download
memory/2860-17-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2860-19-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2860-21-0x00000000003C0000-0x00000000003C6000-memory.dmp

Filesize
24KB

Download
memory/2860-27-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download

Analysis

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