nymaim | b171ed213578fd044444acd7a8679d6867141007cd00d01d6d391685f5e253ae

Analysis

max time kernel
91s
max time network
148s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
07/10/2022, 18:00

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General

Target
file.exe
Size 396KB
Sample221007-wla7lsdad7
SHA256 b171ed213578fd044444acd7a8679d6867141007cd00d01d6d391685f5e253ae
MD5 756cee17400863b7414059927e0d5102
SHA1 ea76ef4c541f7cc8684d6ec82494574290d81e5f
SHA512 7df9379d5e8d380399be9f29378ee6778777b5093546fd950d5121274f295e18c6af15934d20ec2a8646c37c846c2d878cab3351fa9242884112859fa72be3c1
SSDEEP 12288:og/rmV9udkCar/AsQK6+NUd/nqMazAWeunn70:oRLekCarpQKLNU/nXaUM
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

nymaim trojan

Malware Config

Extracted

Family

nymaim

208.67.104.97
85.31.46.167

Signatures

NyMaim
NyMaim is a malware with various capabilities written in C++ and first seen in 2013.
trojan nymaim

Executes dropped EXE 1 IoCs

pid	Process
4136	J1LoZf.exe

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-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	file.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 9 IoCs

pid	pid_target	Process	procid_target
4040	4020	WerFault.exe	79
1568	4020	WerFault.exe	79
4336	4020	WerFault.exe	79
2112	4020	WerFault.exe	79
368	4020	WerFault.exe	79
2264	4020	WerFault.exe	79
260	4020	WerFault.exe	79
1740	4020	WerFault.exe	79
4332	4020	WerFault.exe	79

Kills process with taskkill 1 IoCs

evasion

pid	Process
4376	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4020	file.exe
4020	file.exe
4020	file.exe
4020	file.exe
4020	file.exe
4020	file.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4376	taskkill.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 4020 wrote to memory of 4136	4020	file.exe	102
PID 4020 wrote to memory of 4136	4020	file.exe	102
PID 4020 wrote to memory of 4136	4020	file.exe	102
PID 4020 wrote to memory of 3108	4020	file.exe	108
PID 4020 wrote to memory of 3108	4020	file.exe	108
PID 4020 wrote to memory of 3108	4020	file.exe	108
PID 3108 wrote to memory of 4376	3108	cmd.exe	110
PID 3108 wrote to memory of 4376	3108	cmd.exe	110
PID 3108 wrote to memory of 4376	3108	cmd.exe	110

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4020
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4020 -s 452
  2⤵
  - Program crash
  PID:4040
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4020 -s 772
  2⤵
  - Program crash
  PID:1568
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4020 -s 772
  2⤵
  - Program crash
  PID:4336
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4020 -s 796
  2⤵
  - Program crash
  PID:2112
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4020 -s 804
  2⤵
  - Program crash
  PID:368
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4020 -s 928
  2⤵
  - Program crash
  PID:2264
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4020 -s 932
  2⤵
  - Program crash
  PID:260
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4020 -s 1028
  2⤵
  - Program crash
  PID:1740
- C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\J1LoZf.exe
  2⤵
  - Executes dropped EXE
  PID:4136
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4020 -s 1456
  2⤵
  - Program crash
  PID:4332
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c taskkill /im "file.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\file.exe" & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3108
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "file.exe" /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:4376

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 4020 -ip 4020
1⤵
PID:1668

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 536 -p 4020 -ip 4020
1⤵
PID:2296

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 532 -p 4020 -ip 4020
1⤵
PID:2436

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 556 -p 4020 -ip 4020
1⤵
PID:2120

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 588 -p 4020 -ip 4020
1⤵
PID:3284

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 572 -p 4020 -ip 4020
1⤵
PID:3764

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 580 -p 4020 -ip 4020
1⤵
PID:4972

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 632 -p 4020 -ip 4020
1⤵
PID:2872

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 572 -p 4020 -ip 4020
1⤵
PID:2036

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

Replay Monitor

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Downloads

J1LoZf.exe

Path C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\J1LoZf.exe
Size 72KB
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
SSDEEP 1536:bvUpDLxyxA14o3/M238r6+XfHAgbqmE8MpKdwuasZLUM7DsWlXcdyZgfmi:WDLZKa/MtXfHAgbqmEtxsfmyZgfmi
MD5 SHA1 SHA512 SSDEEP

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J1LoZf.exe

Path C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\J1LoZf.exe
Size 72KB
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
SSDEEP 1536:bvUpDLxyxA14o3/M238r6+XfHAgbqmE8MpKdwuasZLUM7DsWlXcdyZgfmi:WDLZKa/MtXfHAgbqmEtxsfmyZgfmi
MD5 SHA1 SHA512 SSDEEP

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memory/4020-138-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/4020-134-0x0000000000400000-0x0000000000468000-memory.dmp

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memory/4020-132-0x00000000005FD000-0x000000000062E000-memory.dmp

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memory/4020-142-0x00000000005FD000-0x000000000062E000-memory.dmp

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memory/4020-143-0x0000000000400000-0x0000000000468000-memory.dmp

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memory/4020-133-0x0000000002080000-0x00000000020D3000-memory.dmp

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memory/4020-145-0x00000000005FD000-0x000000000062E000-memory.dmp

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memory/4020-146-0x0000000000400000-0x0000000000468000-memory.dmp

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