onlylogger | d73b5c9ba3ddf0b41ea66cf4eea9098d4e810d195cfc37539010d6e49b954344

Analysis

max time kernel
144s
max time network
147s
platform
windows10-2004_x64
resource
win10v2004-20220414-en
submitted
03/05/2022, 20:31

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General

Target
d73b5c9ba3ddf0b41ea66cf4eea9098d4e810d195cfc37539010d6e49b954344.exe
Size 241KB
Sample220503-zay13sefcn
SHA256 d73b5c9ba3ddf0b41ea66cf4eea9098d4e810d195cfc37539010d6e49b954344
MD5 917ccb7eb85219db2ff8104945bec3eb
SHA1 480b275fe4a9533617147086d32e39618b29a9df
SHA512 6d239a4d544c8b6245e6d18bdd2eafd8b953f0917174f3123780dab64c0d9b5369285740df70bb56b5e0a11e8259861c6d80d77d2bfe8a2cb47d64f39cab99e8
MD5 SHA1 SHA512

Score

10^/10

onlylogger loader

Malware Config

Signatures

OnlyLogger
A tiny loader that uses IPLogger to get its payload.
loader onlylogger

OnlyLogger Payload 2 IoCs

resource	yara_rule
behavioral2/memory/1864-131-0x00000000007C0000-0x0000000000806000-memory.dmp	family_onlylogger
behavioral2/memory/1864-132-0x0000000000400000-0x00000000004F6000-memory.dmp	family_onlylogger

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-1-5-21-3751123196-3323558407-1869646069-1000\Control Panel\International\Geo\Nation	d73b5c9ba3ddf0b41ea66cf4eea9098d4e810d195cfc37539010d6e49b954344.exe

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

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
3636	1864	WerFault.exe	79

Kills process with taskkill 1 IoCs

evasion

pid	Process
2204	taskkill.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2204	taskkill.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1864 wrote to memory of 2644	1864	d73b5c9ba3ddf0b41ea66cf4eea9098d4e810d195cfc37539010d6e49b954344.exe	80
PID 1864 wrote to memory of 2644	1864	d73b5c9ba3ddf0b41ea66cf4eea9098d4e810d195cfc37539010d6e49b954344.exe	80
PID 1864 wrote to memory of 2644	1864	d73b5c9ba3ddf0b41ea66cf4eea9098d4e810d195cfc37539010d6e49b954344.exe	80
PID 2644 wrote to memory of 2204	2644	cmd.exe	84
PID 2644 wrote to memory of 2204	2644	cmd.exe	84
PID 2644 wrote to memory of 2204	2644	cmd.exe	84

C:\Users\Admin\AppData\Local\Temp\d73b5c9ba3ddf0b41ea66cf4eea9098d4e810d195cfc37539010d6e49b954344.exe
"C:\Users\Admin\AppData\Local\Temp\d73b5c9ba3ddf0b41ea66cf4eea9098d4e810d195cfc37539010d6e49b954344.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1864
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c taskkill /im "d73b5c9ba3ddf0b41ea66cf4eea9098d4e810d195cfc37539010d6e49b954344.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\d73b5c9ba3ddf0b41ea66cf4eea9098d4e810d195cfc37539010d6e49b954344.exe" & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2644
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "d73b5c9ba3ddf0b41ea66cf4eea9098d4e810d195cfc37539010d6e49b954344.exe" /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:2204
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1864 -s 1264
  2⤵
  - Program crash
  PID:3636

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 1864 -ip 1864
1⤵
PID:912

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/1864-130-0x0000000000829000-0x0000000000851000-memory.dmp

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memory/1864-131-0x00000000007C0000-0x0000000000806000-memory.dmp

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memory/1864-132-0x0000000000400000-0x00000000004F6000-memory.dmp

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Analysis

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General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads