onlylogger | b599fcfe94366591a645a04eefce82c55010a398606699ef403ef1935fed5da5

General

Target
b599fcfe94366591a645a04eefce82c55010a398606699ef403ef1935fed5da5.exe
Size 261KB
Sample220502-sp2besadfk
SHA256 b599fcfe94366591a645a04eefce82c55010a398606699ef403ef1935fed5da5
MD5 4298a62cf60a611ffba91116f255764a
SHA1 b1a76e1b5c439c8a5d9d5024066e2228911769ab
SHA512 9ac269f0b398e4f6f16b23fa1ce8a62967b9222715538ac2c290a20361a534f0dbf4b8099ad66795563e9d7fe1627b67bfdf28411bdccaa2d8d74030d0d27bf0
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/724-131-0x0000000000A40000-0x0000000000A86000-memory.dmp	family_onlylogger
behavioral2/memory/724-132-0x0000000000400000-0x00000000008E1000-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	b599fcfe94366591a645a04eefce82c55010a398606699ef403ef1935fed5da5.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 8 IoCs

pid	pid_target	Process	procid_target
2948	724	WerFault.exe	80
1348	724	WerFault.exe	80
1708	724	WerFault.exe	80
3080	724	WerFault.exe	80
2208	724	WerFault.exe	80
4980	724	WerFault.exe	80
3060	724	WerFault.exe	80
4112	724	WerFault.exe	80

Kills process with taskkill 1 IoCs

evasion

pid	Process
4932	taskkill.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4932	taskkill.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 724 wrote to memory of 4648	724	b599fcfe94366591a645a04eefce82c55010a398606699ef403ef1935fed5da5.exe	103
PID 724 wrote to memory of 4648	724	b599fcfe94366591a645a04eefce82c55010a398606699ef403ef1935fed5da5.exe	103
PID 724 wrote to memory of 4648	724	b599fcfe94366591a645a04eefce82c55010a398606699ef403ef1935fed5da5.exe	103
PID 4648 wrote to memory of 4932	4648	cmd.exe	107
PID 4648 wrote to memory of 4932	4648	cmd.exe	107
PID 4648 wrote to memory of 4932	4648	cmd.exe	107

C:\Users\Admin\AppData\Local\Temp\b599fcfe94366591a645a04eefce82c55010a398606699ef403ef1935fed5da5.exe
"C:\Users\Admin\AppData\Local\Temp\b599fcfe94366591a645a04eefce82c55010a398606699ef403ef1935fed5da5.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:724
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 724 -s 612
  2⤵
  - Program crash
  PID:2948
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 724 -s 632
  2⤵
  - Program crash
  PID:1348
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 724 -s 732
  2⤵
  - Program crash
  PID:1708
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 724 -s 760
  2⤵
  - Program crash
  PID:3080
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 724 -s 884
  2⤵
  - Program crash
  PID:2208
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 724 -s 1164
  2⤵
  - Program crash
  PID:4980
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 724 -s 1240
  2⤵
  - Program crash
  PID:3060
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c taskkill /im "b599fcfe94366591a645a04eefce82c55010a398606699ef403ef1935fed5da5.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\b599fcfe94366591a645a04eefce82c55010a398606699ef403ef1935fed5da5.exe" & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4648
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "b599fcfe94366591a645a04eefce82c55010a398606699ef403ef1935fed5da5.exe" /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:4932
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 724 -s 1332
  2⤵
  - Program crash
  PID:4112

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 416 -p 724 -ip 724
1⤵
PID:2768

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 524 -p 724 -ip 724
1⤵
PID:2928

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 384 -p 724 -ip 724
1⤵
PID:2944

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 560 -p 724 -ip 724
1⤵
PID:1628

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 560 -p 724 -ip 724
1⤵
PID:3372

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 592 -p 724 -ip 724
1⤵
PID:2396

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 428 -p 724 -ip 724
1⤵
PID:4456

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 528 -p 724 -ip 724
1⤵
PID:4032

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/724-130-0x0000000000AD8000-0x0000000000B00000-memory.dmp

Download

memory/724-131-0x0000000000A40000-0x0000000000A86000-memory.dmp

Download

memory/724-132-0x0000000000400000-0x00000000008E1000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads