onlylogger | c23bee9b31a9ac2745839feece9acacf743c4d1acb06cdb2f23067670cc671bc

General

Target
c23bee9b31a9ac2745839feece9acacf743c4d1acb06cdb2f23067670cc671bc.exe
Size 262KB
Sample220501-3ltghsbccl
SHA256 c23bee9b31a9ac2745839feece9acacf743c4d1acb06cdb2f23067670cc671bc
MD5 1893f2bf755227c1c384461a4b190e50
SHA1 0c1b9acfbb2e0b25fc689f718c12fdf496f2ff86
SHA512 4cdcd112498fa1331f4f05faf32ec8d1e59dea1ef46e3ed847f6359a4c760f65bdfe94c4db699b04dc1f06e3f6a3941fad718dc3e81671459a890b0918f55109
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/4120-131-0x0000000002620000-0x0000000002666000-memory.dmp	family_onlylogger
behavioral2/memory/4120-132-0x0000000000400000-0x00000000008E1000-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-1-5-21-2632097139-1792035885-811742494-1000\Control Panel\International\Geo\Nation	c23bee9b31a9ac2745839feece9acacf743c4d1acb06cdb2f23067670cc671bc.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
3316	4120	WerFault.exe	80
4832	4120	WerFault.exe	80
4724	4120	WerFault.exe	80
3832	4120	WerFault.exe	80
624	4120	WerFault.exe	80
1172	4120	WerFault.exe	80
2908	4120	WerFault.exe	80
3928	4120	WerFault.exe	80

Kills process with taskkill 1 IoCs

evasion

pid	Process
928	taskkill.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	928	taskkill.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4120 wrote to memory of 4472	4120	c23bee9b31a9ac2745839feece9acacf743c4d1acb06cdb2f23067670cc671bc.exe	96
PID 4120 wrote to memory of 4472	4120	c23bee9b31a9ac2745839feece9acacf743c4d1acb06cdb2f23067670cc671bc.exe	96
PID 4120 wrote to memory of 4472	4120	c23bee9b31a9ac2745839feece9acacf743c4d1acb06cdb2f23067670cc671bc.exe	96
PID 4472 wrote to memory of 928	4472	cmd.exe	100
PID 4472 wrote to memory of 928	4472	cmd.exe	100
PID 4472 wrote to memory of 928	4472	cmd.exe	100

C:\Users\Admin\AppData\Local\Temp\c23bee9b31a9ac2745839feece9acacf743c4d1acb06cdb2f23067670cc671bc.exe
"C:\Users\Admin\AppData\Local\Temp\c23bee9b31a9ac2745839feece9acacf743c4d1acb06cdb2f23067670cc671bc.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4120
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4120 -s 612
  2⤵
  - Program crash
  PID:3316
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4120 -s 632
  2⤵
  - Program crash
  PID:4832
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4120 -s 740
  2⤵
  - Program crash
  PID:4724
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4120 -s 760
  2⤵
  - Program crash
  PID:3832
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4120 -s 772
  2⤵
  - Program crash
  PID:624
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4120 -s 1192
  2⤵
  - Program crash
  PID:1172
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4120 -s 1220
  2⤵
  - Program crash
  PID:2908
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c taskkill /im "c23bee9b31a9ac2745839feece9acacf743c4d1acb06cdb2f23067670cc671bc.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\c23bee9b31a9ac2745839feece9acacf743c4d1acb06cdb2f23067670cc671bc.exe" & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4472
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "c23bee9b31a9ac2745839feece9acacf743c4d1acb06cdb2f23067670cc671bc.exe" /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:928
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4120 -s 1052
  2⤵
  - Program crash
  PID:3928

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4120 -ip 4120
1⤵
PID:4272

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 464 -p 4120 -ip 4120
1⤵
PID:4636

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 472 -p 4120 -ip 4120
1⤵
PID:4788

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 532 -p 4120 -ip 4120
1⤵
PID:5032

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 524 -p 4120 -ip 4120
1⤵
PID:456

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 512 -p 4120 -ip 4120
1⤵
PID:3500

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 556 -p 4120 -ip 4120
1⤵
PID:4548

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 580 -p 4120 -ip 4120
1⤵
PID:3108

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/4120-130-0x0000000000A78000-0x0000000000AA0000-memory.dmp

Download

memory/4120-131-0x0000000002620000-0x0000000002666000-memory.dmp

Download

memory/4120-132-0x0000000000400000-0x00000000008E1000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads