nymaim | 40e361b33de3c52680033c19d547df052a019a6ef12be362a443b73d926d0609

Analysis

max time kernel
61s
max time network
124s
platform
windows10-2004_x64
resource
win10v2004-20220901-en
resource tags

arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
submitted
16/12/2022, 02:17

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General

Target
file.exe
Size 2.3MB
Sample221216-cqq9vagg3x
SHA256 40e361b33de3c52680033c19d547df052a019a6ef12be362a443b73d926d0609
MD5 06bb53708920954aefa9f5f016360f4c
SHA1 0f58c530ce2a7da9f5806b221156f1691328fe3b
SHA512 e970f6ebe0f80f829b106cdd61febc55af6e7c2917241a58699cbf2578266b7d4fa631a7bd0506668d23be9a47985730a4d74dd68eede94edbde3bf4882c2065
SSDEEP 49152:kNur/rssTJA3Lgi+Bv07BXDqO3prs3k1T+rzmg1qeOCgSY/m:kNy/rjogiEKJDqCmNHmHcY/m
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

nymaim discovery trojan

Malware Config

Extracted

Family

nymaim

45.139.105.171
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 3 IoCs

pid	Process
2228	is-J6TSO.tmp
2816	nzFolders.exe
5096	ZEZ9E.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	nzFolders.exe

Loads dropped DLL 1 IoCs

pid	Process
2228	is-J6TSO.tmp

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Drops file in Program Files directory 9 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-J6TSO.tmp
File created	C:\Program Files (x86)\PrintFolders\is-MS744.tmp	is-J6TSO.tmp
File created	C:\Program Files (x86)\PrintFolders\is-QC1RA.tmp	is-J6TSO.tmp
File created	C:\Program Files (x86)\PrintFolders\is-JNJMH.tmp	is-J6TSO.tmp
File created	C:\Program Files (x86)\PrintFolders\is-3B6S5.tmp	is-J6TSO.tmp
File created	C:\Program Files (x86)\PrintFolders\is-TLSIF.tmp	is-J6TSO.tmp
File created	C:\Program Files (x86)\PrintFolders\is-STCEE.tmp	is-J6TSO.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-J6TSO.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\nzFolders.exe	is-J6TSO.tmp

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Kills process with taskkill 1 IoCs

evasion

pid	Process
4476	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2816	nzFolders.exe
2816	nzFolders.exe
2816	nzFolders.exe
2816	nzFolders.exe
2816	nzFolders.exe
2816	nzFolders.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4476	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 1728 wrote to memory of 2228	1728	file.exe	81
PID 1728 wrote to memory of 2228	1728	file.exe	81
PID 1728 wrote to memory of 2228	1728	file.exe	81
PID 2228 wrote to memory of 2816	2228	is-J6TSO.tmp	82
PID 2228 wrote to memory of 2816	2228	is-J6TSO.tmp	82
PID 2228 wrote to memory of 2816	2228	is-J6TSO.tmp	82
PID 2816 wrote to memory of 5096	2816	nzFolders.exe	83
PID 2816 wrote to memory of 5096	2816	nzFolders.exe	83
PID 2816 wrote to memory of 5096	2816	nzFolders.exe	83
PID 2816 wrote to memory of 3696	2816	nzFolders.exe	91
PID 2816 wrote to memory of 3696	2816	nzFolders.exe	91
PID 2816 wrote to memory of 3696	2816	nzFolders.exe	91
PID 3696 wrote to memory of 4476	3696	cmd.exe	93
PID 3696 wrote to memory of 4476	3696	cmd.exe	93
PID 3696 wrote to memory of 4476	3696	cmd.exe	93

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1728
- C:\Users\Admin\AppData\Local\Temp\is-5HCDA.tmp\is-J6TSO.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-5HCDA.tmp\is-J6TSO.tmp" /SL4 $E01BA "C:\Users\Admin\AppData\Local\Temp\file.exe" 2109241 208896
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:2228
- - C:\Program Files (x86)\PrintFolders\nzFolders.exe
    "C:\Program Files (x86)\PrintFolders\nzFolders.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:2816
  - - C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\ZEZ9E.exe
      4⤵
      Executes dropped EXE
      PID:5096
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "nzFolders.exe" /f & erase "C:\Program Files (x86)\PrintFolders\nzFolders.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:3696
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "nzFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:4476

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

nzFolders.exe

Path C:\Program Files (x86)\PrintFolders\nzFolders.exe
Size 3.3MB
SHA256 833fb4dd2af4f5b482d0fc516024daf00d102fd12284619c2280fcdd83b1dd6d
MD5 b23fbe81bb4a06b3eb43d3151abf4bba
SHA1 129f798261bf6e27096642529cfe7f99b2523a92
SHA512 bbc5fdeb6a023724c7a9125626d7baa3e97650c94caf0a92ededff940e93df866dc4296d7a94cf6f28c3af96c1059ba916796e213253cd8acaeeeab40819af5d
SSDEEP 49152:f97v4R5CVXWIXwS3FfYTaswEvs+dviHinMDd+I1Fc:f97v4PqXWswYfYTaswE0+FiCnMDd+uK
MD5 SHA1 SHA512 SSDEEP

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nzFolders.exe

Path C:\Program Files (x86)\PrintFolders\nzFolders.exe
Size 3.3MB
SHA256 833fb4dd2af4f5b482d0fc516024daf00d102fd12284619c2280fcdd83b1dd6d
MD5 b23fbe81bb4a06b3eb43d3151abf4bba
SHA1 129f798261bf6e27096642529cfe7f99b2523a92
SHA512 bbc5fdeb6a023724c7a9125626d7baa3e97650c94caf0a92ededff940e93df866dc4296d7a94cf6f28c3af96c1059ba916796e213253cd8acaeeeab40819af5d
SSDEEP 49152:f97v4R5CVXWIXwS3FfYTaswEvs+dviHinMDd+I1Fc:f97v4PqXWswYfYTaswE0+FiCnMDd+uK
MD5 SHA1 SHA512 SSDEEP

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is-J6TSO.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-5HCDA.tmp\is-J6TSO.tmp
Size 797KB
SHA256 424fb4432fa651db203c38efd930813c49e90f506a7f5465347eff4eda44a711
MD5 fc4bab9305f2a869cb26d22e008f2921
SHA1 9871140128ea98e2cc798f3ef4c3cd546442969f
SHA512 bcaff0260b9cb2a6c3d7aabb7d1b1e02ca8968cdb0715f78db93755b44aa18e8f146b9052dc7fcf54796f044cf779cb989d34db8c17cf9eca53b30acfc708506
SSDEEP 24576:n5NoqWolrP837JzHvA6yknyWFxvSur/TxOu:njrP837JzHvA6pnvFxvSur/1p
MD5 SHA1 SHA512 SSDEEP

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is-J6TSO.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-5HCDA.tmp\is-J6TSO.tmp
Size 797KB
SHA256 424fb4432fa651db203c38efd930813c49e90f506a7f5465347eff4eda44a711
MD5 fc4bab9305f2a869cb26d22e008f2921
SHA1 9871140128ea98e2cc798f3ef4c3cd546442969f
SHA512 bcaff0260b9cb2a6c3d7aabb7d1b1e02ca8968cdb0715f78db93755b44aa18e8f146b9052dc7fcf54796f044cf779cb989d34db8c17cf9eca53b30acfc708506
SSDEEP 24576:n5NoqWolrP837JzHvA6yknyWFxvSur/TxOu:njrP837JzHvA6pnvFxvSur/1p
MD5 SHA1 SHA512 SSDEEP

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_iscrypt.dll

Path C:\Users\Admin\AppData\Local\Temp\is-SFPB4.tmp\_iscrypt.dll
Size 2KB
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
MD5 SHA1 SHA512

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ZEZ9E.exe

Path C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\ZEZ9E.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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ZEZ9E.exe

Path C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\ZEZ9E.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/1728-137-0x0000000000400000-0x0000000000439000-memory.dmp

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memory/1728-155-0x0000000000400000-0x0000000000439000-memory.dmp

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memory/1728-132-0x0000000000400000-0x0000000000439000-memory.dmp

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memory/2816-143-0x0000000000400000-0x0000000001548000-memory.dmp

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memory/2816-142-0x0000000000400000-0x0000000001548000-memory.dmp

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memory/2816-147-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/2816-151-0x0000000000400000-0x0000000001548000-memory.dmp

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memory/2816-154-0x0000000000400000-0x0000000001548000-memory.dmp

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