nymaim | fe30369ef1c3f03d98d0b7a2aafe20678b9ce0edaafa28d12f997bf6eabc6121

Analysis

max time kernel
91s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
10/10/2022, 09:22

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General

Target
file.exe
Size 406KB
Sample221010-lbw18abda4
SHA256 fe30369ef1c3f03d98d0b7a2aafe20678b9ce0edaafa28d12f997bf6eabc6121
MD5 cb81f675cfcc30c65e260d9379c30fa3
SHA1 3c7eeb0dec65e46bca358a68e3f2cff11e336aa0
SHA512 1101eef57fe9d335c30c8670cb9264c292d95985a202472df173b298c72cf42c29537c7bb3cc958f9b26156291f878fe94277b26bf50b24586a1593279ae4ba4
SSDEEP 6144:ev6i8Shp2x/kpC1/9FuS9CRCZhRHGzhUzxJYwDUrV3l39QrwVfquS:evfhp2y2WdRCfRkJzrJl+d
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
2040	l7zD2RE.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-1-5-21-2629973501-4017243118-3254762364-1000\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
1824	3020	WerFault.exe	81
4800	3020	WerFault.exe	81
1860	3020	WerFault.exe	81
5012	3020	WerFault.exe	81
4556	3020	WerFault.exe	81
4228	3020	WerFault.exe	81
1924	3020	WerFault.exe	81
4416	3020	WerFault.exe	81
1552	3020	WerFault.exe	81

Kills process with taskkill 1 IoCs

evasion

pid	Process
1772	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
3020	file.exe
3020	file.exe
3020	file.exe
3020	file.exe
3020	file.exe
3020	file.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1772	taskkill.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 3020 wrote to memory of 2040	3020	file.exe	97
PID 3020 wrote to memory of 2040	3020	file.exe	97
PID 3020 wrote to memory of 2040	3020	file.exe	97
PID 3020 wrote to memory of 1780	3020	file.exe	107
PID 3020 wrote to memory of 1780	3020	file.exe	107
PID 3020 wrote to memory of 1780	3020	file.exe	107
PID 1780 wrote to memory of 1772	1780	cmd.exe	111
PID 1780 wrote to memory of 1772	1780	cmd.exe	111
PID 1780 wrote to memory of 1772	1780	cmd.exe	111

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:3020
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3020 -s 452
  2⤵
  - Program crash
  PID:1824
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3020 -s 764
  2⤵
  - Program crash
  PID:4800
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3020 -s 804
  2⤵
  - Program crash
  PID:1860
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3020 -s 764
  2⤵
  - Program crash
  PID:5012
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3020 -s 796
  2⤵
  - Program crash
  PID:4556
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3020 -s 780
  2⤵
  - Program crash
  PID:4228
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3020 -s 764
  2⤵
  - Program crash
  PID:1924
- C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\l7zD2RE.exe
  2⤵
  - Executes dropped EXE
  PID:2040
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3020 -s 1444
  2⤵
  - Program crash
  PID:4416
- 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:1780
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "file.exe" /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:1772
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3020 -s 512
  2⤵
  - Program crash
  PID:1552

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 3020 -ip 3020
1⤵
PID:1264

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 3020 -ip 3020
1⤵
PID:692

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 524 -p 3020 -ip 3020
1⤵
PID:4688

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 3020 -ip 3020
1⤵
PID:3184

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 528 -p 3020 -ip 3020
1⤵
PID:1148

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 560 -p 3020 -ip 3020
1⤵
PID:2100

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 520 -p 3020 -ip 3020
1⤵
PID:2976

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 540 -p 3020 -ip 3020
1⤵
PID:3776

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 520 -p 3020 -ip 3020
1⤵
PID:3660

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

l7zD2RE.exe

Path C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\l7zD2RE.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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l7zD2RE.exe

Path C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\l7zD2RE.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/3020-138-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/3020-132-0x0000000000617000-0x0000000000647000-memory.dmp

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memory/3020-142-0x0000000000900000-0x0000000000953000-memory.dmp

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memory/3020-143-0x0000000000617000-0x0000000000647000-memory.dmp

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memory/3020-144-0x0000000000400000-0x000000000046B000-memory.dmp

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memory/3020-134-0x0000000000400000-0x000000000046B000-memory.dmp

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memory/3020-133-0x0000000000900000-0x0000000000953000-memory.dmp

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memory/3020-148-0x0000000000400000-0x000000000046B000-memory.dmp

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memory/3020-147-0x0000000000617000-0x0000000000647000-memory.dmp

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