sakula | 7a3c203d3668423e2bf6e11568ceeac3c5081d06f304db0db39fea341833323e

General

Target
virussign.exe
Size 212KB
Sample220716-j4f5csbcam
SHA256 7a3c203d3668423e2bf6e11568ceeac3c5081d06f304db0db39fea341833323e
MD5 1bc0e4769e7c8d200892a2b1450961e0
SHA1 08b0805ed34458af16a73e494999ad2e8ba83655
SHA512 406170bf43063a2b18359560d73ef0c3bb0726d3f0d180d3aa02e504ac0cda3eb408606f8932ed35e4e0a84f1d04cbe0fa6212d910a33089dc496d8dd644a502
MD5 SHA1 SHA512

Score

10^/10

sakula persistence rat suricata trojan upx

Malware Config

Signatures

Sakula
Sakula is a remote access trojan with various capabilities.
trojan rat sakula

Sakula payload 6 IoCs

resource	yara_rule
behavioral2/files/0x0003000000000721-132.dat	family_sakula
behavioral2/files/0x0003000000000721-131.dat	family_sakula
behavioral2/memory/3000-133-0x0000000000400000-0x0000000000435000-memory.dmp	family_sakula
behavioral2/memory/4088-134-0x0000000000400000-0x0000000000435000-memory.dmp	family_sakula
behavioral2/memory/4088-135-0x0000000000400000-0x0000000000435000-memory.dmp	family_sakula
behavioral2/memory/3000-137-0x0000000000400000-0x0000000000435000-memory.dmp	family_sakula

suricata: ET MALWARE SUSPICIOUS UA (iexplore)
suricata: ET MALWARE SUSPICIOUS UA (iexplore)
suricata
suricata: ET MALWARE Sakula/Mivast RAT CnC Beacon 1
suricata: ET MALWARE Sakula/Mivast RAT CnC Beacon 1
suricata

Executes dropped EXE 1 IoCs

pid	Process
4088	MediaCenter.exe

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x0003000000000721-132.dat	upx
behavioral2/files/0x0003000000000721-131.dat	upx
behavioral2/memory/3000-133-0x0000000000400000-0x0000000000435000-memory.dmp	upx
behavioral2/memory/4088-134-0x0000000000400000-0x0000000000435000-memory.dmp	upx
behavioral2/memory/4088-135-0x0000000000400000-0x0000000000435000-memory.dmp	upx
behavioral2/memory/3000-137-0x0000000000400000-0x0000000000435000-memory.dmp	upx

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\Control Panel\International\Geo\Nation	virussign.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\MicroMedia = "C:\\Users\\Admin\\AppData\\Local\\Temp\\MicroMedia\\MediaCenter.exe"	virussign.exe

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

System Information Discovery
T1082

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
5076	PING.EXE

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeIncBasePriorityPrivilege	3000	virussign.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 3000 wrote to memory of 4088	3000	virussign.exe	82
PID 3000 wrote to memory of 4088	3000	virussign.exe	82
PID 3000 wrote to memory of 4088	3000	virussign.exe	82
PID 3000 wrote to memory of 3528	3000	virussign.exe	84
PID 3000 wrote to memory of 3528	3000	virussign.exe	84
PID 3000 wrote to memory of 3528	3000	virussign.exe	84
PID 3528 wrote to memory of 5076	3528	cmd.exe	86
PID 3528 wrote to memory of 5076	3528	cmd.exe	86
PID 3528 wrote to memory of 5076	3528	cmd.exe	86

C:\Users\Admin\AppData\Local\Temp\virussign.exe
"C:\Users\Admin\AppData\Local\Temp\virussign.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3000
- C:\Users\Admin\AppData\Local\Temp\MicroMedia\MediaCenter.exe
  C:\Users\Admin\AppData\Local\Temp\MicroMedia\MediaCenter.exe
  2⤵
  - Executes dropped EXE
  PID:4088
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c ping 127.0.0.1 & del /q "C:\Users\Admin\AppData\Local\Temp\virussign.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3528
- - C:\Windows\SysWOW64\PING.EXE
    ping 127.0.0.1
    3⤵
    - Runs ping.exe
    PID:5076

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

Remote System Discovery

1

T1018

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

MediaCenter.exe

Path C:\Users\Admin\AppData\Local\Temp\MicroMedia\MediaCenter.exe
Size 212KB
SHA256 11023e2ad8f91e567c54aa10fbe9110338c8a2d60eacd652d3b7c6f99d465551
MD5 349fbefe7935ba6d15c55c1f69f13d95
SHA1 21b0009e3e4ceb65cf3f11b10b80183bf42239db
SHA512 4b68b5404d62b50aac704cac18544163620282f87b6b7219ee663285fdff81c8f4299ff47a9fb9d57ac5af34ae429106ee304218fa16dd9882207e91dbce0baf
SSDEEP 1536:XcQFl29mEkE0L1rDEKrxZKF2zf9g2Pl7W/MwbxMX++pdz30rtr8gjXjp0danBH:r29DkEGRQixVSjLc130BYgjXjpDnBH
MD5 SHA1 SHA512 SSDEEP

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MediaCenter.exe

Path C:\Users\Admin\AppData\Local\Temp\MicroMedia\MediaCenter.exe
Size 212KB
SHA256 11023e2ad8f91e567c54aa10fbe9110338c8a2d60eacd652d3b7c6f99d465551
MD5 349fbefe7935ba6d15c55c1f69f13d95
SHA1 21b0009e3e4ceb65cf3f11b10b80183bf42239db
SHA512 4b68b5404d62b50aac704cac18544163620282f87b6b7219ee663285fdff81c8f4299ff47a9fb9d57ac5af34ae429106ee304218fa16dd9882207e91dbce0baf
SSDEEP 1536:XcQFl29mEkE0L1rDEKrxZKF2zf9g2Pl7W/MwbxMX++pdz30rtr8gjXjp0danBH:r29DkEGRQixVSjLc130BYgjXjpDnBH
MD5 SHA1 SHA512 SSDEEP

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memory/3000-133-0x0000000000400000-0x0000000000435000-memory.dmp

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memory/3000-137-0x0000000000400000-0x0000000000435000-memory.dmp

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memory/4088-134-0x0000000000400000-0x0000000000435000-memory.dmp

Download

memory/4088-135-0x0000000000400000-0x0000000000435000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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