nymaim | b6f4bcd06f4d8a9f7e45c763fc7cad24e3b4c7677f7e6a39dfed6962ef7956a1

Analysis

max time kernel
91s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20220901-en
resource tags

arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
submitted
07/10/2022, 04:14

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General

Target
file.exe
Size 396KB
Sample221007-etndgabef8
SHA256 b6f4bcd06f4d8a9f7e45c763fc7cad24e3b4c7677f7e6a39dfed6962ef7956a1
MD5 10335b701914e3a64db2c1d880d59305
SHA1 0473c3377cf8f71ebc74595477f992ce5658bd85
SHA512 0884f3935ecd91ad5fba6285994114e16ec56eb9fc6e6f277919e88334431ef7abb34df33cde0465c4b7840b135f9cd1df10fb63877f7c0fcc4e57945aec18df
SSDEEP 6144:V60AlFk5PN2j4zebWvc/9RyoT3TokNkxiit5Ruzbgwu8wVfU:V9WjczeF/9TTg7t5RunnH
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
1928	uHVytQowb.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-1-5-21-929662420-1054238289-2961194603-1000\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 8 IoCs

pid	pid_target	Process	procid_target
3796	2708	WerFault.exe	81
2180	2708	WerFault.exe	81
1452	2708	WerFault.exe	81
520	2708	WerFault.exe	81
1996	2708	WerFault.exe	81
4684	2708	WerFault.exe	81
1536	2708	WerFault.exe	81
960	2708	WerFault.exe	81

Kills process with taskkill 1 IoCs

evasion

pid	Process
4084	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2708	file.exe
2708	file.exe
2708	file.exe
2708	file.exe
2708	file.exe
2708	file.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4084	taskkill.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2708 wrote to memory of 1928	2708	file.exe	103
PID 2708 wrote to memory of 1928	2708	file.exe	103
PID 2708 wrote to memory of 1928	2708	file.exe	103
PID 2708 wrote to memory of 4528	2708	file.exe	107
PID 2708 wrote to memory of 4528	2708	file.exe	107
PID 2708 wrote to memory of 4528	2708	file.exe	107
PID 4528 wrote to memory of 4084	4528	cmd.exe	109
PID 4528 wrote to memory of 4084	4528	cmd.exe	109
PID 4528 wrote to memory of 4084	4528	cmd.exe	109

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:2708
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2708 -s 452
  2⤵
  - Program crash
  PID:3796
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2708 -s 764
  2⤵
  - Program crash
  PID:2180
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2708 -s 764
  2⤵
  - Program crash
  PID:1452
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2708 -s 796
  2⤵
  - Program crash
  PID:520
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2708 -s 804
  2⤵
  - Program crash
  PID:1996
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2708 -s 832
  2⤵
  - Program crash
  PID:4684
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2708 -s 832
  2⤵
  - Program crash
  PID:1536
- C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\uHVytQowb.exe
  2⤵
  - Executes dropped EXE
  PID:1928
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2708 -s 1372
  2⤵
  - Program crash
  PID:960
- 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:4528
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "file.exe" /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:4084

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 184 -p 2708 -ip 2708
1⤵
PID:2256

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 2708 -ip 2708
1⤵
PID:3888

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 480 -p 2708 -ip 2708
1⤵
PID:4260

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 484 -p 2708 -ip 2708
1⤵
PID:4316

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 540 -p 2708 -ip 2708
1⤵
PID:4004

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 480 -p 2708 -ip 2708
1⤵
PID:4172

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 532 -p 2708 -ip 2708
1⤵
PID:1360

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 516 -p 2708 -ip 2708
1⤵
PID:4352

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

uHVytQowb.exe

Path C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\uHVytQowb.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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uHVytQowb.exe

Path C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\uHVytQowb.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/2708-138-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/2708-134-0x0000000000400000-0x0000000000468000-memory.dmp

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memory/2708-133-0x00000000005E0000-0x0000000000633000-memory.dmp

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memory/2708-132-0x00000000006AD000-0x00000000006DE000-memory.dmp

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memory/2708-142-0x00000000006AD000-0x00000000006DE000-memory.dmp

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memory/2708-143-0x0000000000400000-0x0000000000468000-memory.dmp

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memory/2708-145-0x00000000006AD000-0x00000000006DE000-memory.dmp

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memory/2708-146-0x0000000000400000-0x0000000000468000-memory.dmp

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