6f033527029f357c7e0cd6e38a04dcbbb06e4e0c255700e150089e220c1ed9b9

General

Target

2024-04-15_cf38fd8a2c02208aac88a637c2f1d31c_cryptolocker.exe
Size

54KB
MD5

cf38fd8a2c02208aac88a637c2f1d31c
SHA1

13ca54a0fdff2a97f330159421bdeb29e5cb1e6e
SHA256

6f033527029f357c7e0cd6e38a04dcbbb06e4e0c255700e150089e220c1ed9b9
SHA512

08cbb18428fc91c39eed719c3c5d27819e660f6193e0ab3de90fe52130be7fe50b05f4b5afc8381b57c624f79e3cc98ff72ec506f44cce2c7f92a371126b7b38
SSDEEP

768:bP9g/WItCSsAfFaeOcfXVr3BPOz5CFBmNuFgUL7:bP9g/xtCS3Dxx0G

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral1/memory/2820-0-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000a000000013a21-11.dat	CryptoLocker_rule2
behavioral1/memory/1528-17-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2820-13-0x0000000001E80000-0x0000000001E8E000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral1/memory/2820-0-0x0000000000400000-0x000000000040E000-memory.dmp	UPX
behavioral1/files/0x000a000000013a21-11.dat	UPX
behavioral1/memory/1528-17-0x0000000000400000-0x000000000040E000-memory.dmp	UPX
behavioral1/memory/2820-13-0x0000000001E80000-0x0000000001E8E000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
1528	gewos.exe

Loads dropped DLL 1 IoCs

pid	Process
2820	2024-04-15_cf38fd8a2c02208aac88a637c2f1d31c_cryptolocker.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2820-0-0x0000000000400000-0x000000000040E000-memory.dmp	upx
behavioral1/files/0x000a000000013a21-11.dat	upx
behavioral1/memory/1528-17-0x0000000000400000-0x000000000040E000-memory.dmp	upx
behavioral1/memory/2820-13-0x0000000001E80000-0x0000000001E8E000-memory.dmp	upx

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Modifies system certificate store 2 TTPs 4 IoCs

evasion spyware trojan

Install Root Certificate

T1553.004

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\B1BC968BD4F49D622AA89A81F2150152A41D829C	gewos.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\B1BC968BD4F49D622AA89A81F2150152A41D829C\Blob = 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	gewos.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\B1BC968BD4F49D622AA89A81F2150152A41D829C\Blob = 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	gewos.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\B1BC968BD4F49D622AA89A81F2150152A41D829C\Blob = 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	gewos.exe

Suspicious use of UnmapMainImage 2 IoCs

pid	Process
2820	2024-04-15_cf38fd8a2c02208aac88a637c2f1d31c_cryptolocker.exe
1528	gewos.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2820 wrote to memory of 1528	2820	2024-04-15_cf38fd8a2c02208aac88a637c2f1d31c_cryptolocker.exe	28
PID 2820 wrote to memory of 1528	2820	2024-04-15_cf38fd8a2c02208aac88a637c2f1d31c_cryptolocker.exe	28
PID 2820 wrote to memory of 1528	2820	2024-04-15_cf38fd8a2c02208aac88a637c2f1d31c_cryptolocker.exe	28
PID 2820 wrote to memory of 1528	2820	2024-04-15_cf38fd8a2c02208aac88a637c2f1d31c_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-04-15_cf38fd8a2c02208aac88a637c2f1d31c_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-15_cf38fd8a2c02208aac88a637c2f1d31c_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:2820
- C:\Users\Admin\AppData\Local\Temp\gewos.exe
  "C:\Users\Admin\AppData\Local\Temp\gewos.exe"
  2⤵
  - Executes dropped EXE
  - Modifies system certificate store
  - Suspicious use of UnmapMainImage
  PID:1528

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Subvert Trust Controls

1

T1553

Install Root Certificate

1

T1553.004

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\94308059B57B3142E455B38A6EB92015

Filesize
68KB

MD5
29f65ba8e88c063813cc50a4ea544e93

SHA1
05a7040d5c127e68c25d81cc51271ffb8bef3568

SHA256
1ed81fa8dfb6999a9fedc6e779138ffd99568992e22d300acd181a6d2c8de184

SHA512
e29b2e92c496245bed3372578074407e8ef8882906ce10c35b3c8deebfefe01b5fd7f3030acaa693e175f4b7aca6cd7d8d10ae1c731b09c5fa19035e005de3aa

Download Submit
\Users\Admin\AppData\Local\Temp\gewos.exe

Filesize
54KB

MD5
66c3c918a57e77cf266bb370f0319be8

SHA1
73cc9e19504f73d7be81cfd5b0d0e4554ce57436

SHA256
31c70e6c995886cb030c2aefab972b49c1acbbbb393585b3075e5f5141f7be3c

SHA512
ada84ef0e04c38c4a7e588af24a6658327e3d8236249c2092fa869be41e087e869d6900bc65b5b3aaf926d87b9456b426a32d2133e6a67eefb7f7fcf8b3f5126

Download Submit
memory/1528-17-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/1528-26-0x0000000000290000-0x0000000000296000-memory.dmp

Filesize
24KB

Download
memory/2820-0-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2820-1-0x0000000000360000-0x0000000000366000-memory.dmp

Filesize
24KB

Download
memory/2820-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2820-4-0x0000000000360000-0x0000000000366000-memory.dmp

Filesize
24KB

Download
memory/2820-13-0x0000000001E80000-0x0000000001E8E000-memory.dmp

Filesize
56KB

Download

Analysis

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