onlylogger | 126cf8a0a2c70e617cc5c2540cf98f4c0428631da2055a65af5fb2a56155e13b

General

Target
126cf8a0a2c70e617cc5c2540cf98f4c0428631da2055a65af5fb2a56155e13b.exe
Size 419KB
Sample220603-tvl95affhm
SHA256 126cf8a0a2c70e617cc5c2540cf98f4c0428631da2055a65af5fb2a56155e13b
MD5 8876f7bd993277498d9c7cfbe2639a2d
SHA1 f90b3121ed751ca5eb0b0f2604e2550334c07085
SHA512 b95be13140e3c1d503a6d6f447477eb52b064139a758d48c0fa9d3d67689f23ed6ecd1c8d14cd3f5a641fce9da594850158144e20c2d5dbce6cd2e9d7bc815b5
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 3 IoCs

resource	yara_rule
behavioral2/memory/3844-131-0x0000000003570000-0x00000000035C1000-memory.dmp	family_onlylogger
behavioral2/memory/3844-132-0x0000000000400000-0x0000000001938000-memory.dmp	family_onlylogger
behavioral2/memory/3844-136-0x0000000000400000-0x0000000001938000-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-1-5-21-2632097139-1792035885-811742494-1000\Control Panel\International\Geo\Nation	126cf8a0a2c70e617cc5c2540cf98f4c0428631da2055a65af5fb2a56155e13b.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 7 IoCs

pid	pid_target	Process	procid_target
5052	3844	WerFault.exe	77
1132	3844	WerFault.exe	77
4936	3844	WerFault.exe	77
4884	3844	WerFault.exe	77
536	3844	WerFault.exe	77
228	3844	WerFault.exe	77
1276	3844	WerFault.exe	77

Kills process with taskkill 1 IoCs

evasion

pid	Process
1280	taskkill.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1280	taskkill.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3844 wrote to memory of 3100	3844	126cf8a0a2c70e617cc5c2540cf98f4c0428631da2055a65af5fb2a56155e13b.exe	93
PID 3844 wrote to memory of 3100	3844	126cf8a0a2c70e617cc5c2540cf98f4c0428631da2055a65af5fb2a56155e13b.exe	93
PID 3844 wrote to memory of 3100	3844	126cf8a0a2c70e617cc5c2540cf98f4c0428631da2055a65af5fb2a56155e13b.exe	93
PID 3100 wrote to memory of 1280	3100	cmd.exe	97
PID 3100 wrote to memory of 1280	3100	cmd.exe	97
PID 3100 wrote to memory of 1280	3100	cmd.exe	97

C:\Users\Admin\AppData\Local\Temp\126cf8a0a2c70e617cc5c2540cf98f4c0428631da2055a65af5fb2a56155e13b.exe
"C:\Users\Admin\AppData\Local\Temp\126cf8a0a2c70e617cc5c2540cf98f4c0428631da2055a65af5fb2a56155e13b.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3844
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3844 -s 696
  2⤵
  - Program crash
  PID:5052
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3844 -s 764
  2⤵
  - Program crash
  PID:1132
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3844 -s 920
  2⤵
  - Program crash
  PID:4936
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3844 -s 928
  2⤵
  - Program crash
  PID:4884
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3844 -s 928
  2⤵
  - Program crash
  PID:536
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3844 -s 932
  2⤵
  - Program crash
  PID:228
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c taskkill /im "126cf8a0a2c70e617cc5c2540cf98f4c0428631da2055a65af5fb2a56155e13b.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\126cf8a0a2c70e617cc5c2540cf98f4c0428631da2055a65af5fb2a56155e13b.exe" & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3100
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "126cf8a0a2c70e617cc5c2540cf98f4c0428631da2055a65af5fb2a56155e13b.exe" /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:1280
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3844 -s 732
  2⤵
  - Program crash
  PID:1276

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 204 -p 3844 -ip 3844
1⤵
PID:1516

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 464 -p 3844 -ip 3844
1⤵
PID:1496

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 516 -p 3844 -ip 3844
1⤵
PID:4744

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 472 -p 3844 -ip 3844
1⤵
PID:4984

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 508 -p 3844 -ip 3844
1⤵
PID:4000

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 3844 -ip 3844
1⤵
PID:368

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 516 -p 3844 -ip 3844
1⤵
PID:2168

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/3844-130-0x0000000001B90000-0x0000000001BBE000-memory.dmp

Download

memory/3844-131-0x0000000003570000-0x00000000035C1000-memory.dmp

Download

memory/3844-132-0x0000000000400000-0x0000000001938000-memory.dmp

Download

memory/3844-133-0x0000000001B90000-0x0000000001BBE000-memory.dmp

Download

memory/3844-136-0x0000000000400000-0x0000000001938000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads