grandoreiro | 6f1161528775718592e4b9dbb08e04bc7e717f15da6665e6483d699783837bad

Analysis

max time kernel
147s
max time network
36s
platform
windows7_x64
resource
win7-20230220-en
resource tags

arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
submitted
07/05/2023, 09:24

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General

Target

zlibai.dll
Size

26.1MB
MD5

eaa28762cd1fb1c7eba1fc77ef9791aa
SHA1

212142d9e2ed9c7674c975bbeb9abc9211b4af42
SHA256

6f1161528775718592e4b9dbb08e04bc7e717f15da6665e6483d699783837bad
SHA512

8fb578bd4e9422eec2d1e622abd99f95c8e32360daf4b3a003195e4d9b198c048e0b312abf73b87195c13acd3234d4f15bd66fe67a47985daa38e5ef454307e4
SSDEEP

196608:tZ1Fmw2v2mVO0iWRjwr5NUR4ureIXH5yJ7nxkYuQPP3r7DbGF/UALgV:tHFCO0bRkr5NUR4ureIXYjTuQPPy/UQ

Score

10^/10

grandoreiro banker trojan

Malware Config

Signatures

Detects Grandoreiro payload 3 IoCs

resource	yara_rule
behavioral1/memory/1288-54-0x0000000001F10000-0x000000000393F000-memory.dmp	family_grandoreiro_v1
behavioral1/memory/1288-60-0x0000000001F10000-0x000000000393F000-memory.dmp	family_grandoreiro_v1
behavioral1/memory/1288-61-0x0000000001F10000-0x000000000393F000-memory.dmp	family_grandoreiro_v1

Grandoreiro
Part of a group of banking trojans, targeting Spanish and Portuguese speaking countries.
trojan banker grandoreiro
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 1116 wrote to memory of 1288	1116	rundll32.exe	26
PID 1116 wrote to memory of 1288	1116	rundll32.exe	26
PID 1116 wrote to memory of 1288	1116	rundll32.exe	26
PID 1116 wrote to memory of 1288	1116	rundll32.exe	26
PID 1116 wrote to memory of 1288	1116	rundll32.exe	26
PID 1116 wrote to memory of 1288	1116	rundll32.exe	26
PID 1116 wrote to memory of 1288	1116	rundll32.exe	26

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\zlibai.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1116
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\zlibai.dll,#1
  2⤵
  PID:1288

Network

MITRE ATT&CK Enterprise v6

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

memory/1288-54-0x0000000001F10000-0x000000000393F000-memory.dmp

Filesize
26.2MB

Download
memory/1288-55-0x00000000004A0000-0x00000000004A1000-memory.dmp

Filesize
4KB

Download
memory/1288-59-0x0000000001E20000-0x0000000001E21000-memory.dmp

Filesize
4KB

Download
memory/1288-58-0x00000000004A0000-0x00000000004A1000-memory.dmp

Filesize
4KB

Download
memory/1288-60-0x0000000001F10000-0x000000000393F000-memory.dmp

Filesize
26.2MB

Download
memory/1288-61-0x0000000001F10000-0x000000000393F000-memory.dmp

Filesize
26.2MB

Download