nymaim | 86d532c61bd24aa7de7466adc92df6e11dac6ec4af7c41b7a51bb07fb8c8dad3

Analysis

max time kernel
90s
max time network
138s
platform
windows10-2004_x64
resource
win10v2004-20220901-en
resource tags

arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
submitted
09/12/2022, 07:02

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General

Target
file.exe
Size 2.2MB
Sample221209-htr87scf22
SHA256 86d532c61bd24aa7de7466adc92df6e11dac6ec4af7c41b7a51bb07fb8c8dad3
MD5 24ebeeee8eca5c51e49b86d964a75c80
SHA1 cd647683be65f844b50bb0059afd43e85f6329a1
SHA512 0196c66a6a46cf434409768e911fc78dfcc7141c9b5dd33b8c173c6a5f4a4718af1a9e291a1482e9b6f6a905fa2ebbad1d43b0f820d52154ebcca9a24e95f1f4
SSDEEP 49152:67aDAS3aTIjUl0SHlXMaY9MULf5LZuQncKQumZ8:6mDASATfFXVI5ZLncTq
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
840	is-B3E7U.tmp
4244	ntFolders.exe
4752	kLAb1H.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	ntFolders.exe

Loads dropped DLL 1 IoCs

pid	Process
840	is-B3E7U.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\is-KCRN1.tmp	is-B3E7U.tmp
File created	C:\Program Files (x86)\PrintFolders\is-OTFB2.tmp	is-B3E7U.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-B3E7U.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\ntFolders.exe	is-B3E7U.tmp
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-B3E7U.tmp
File created	C:\Program Files (x86)\PrintFolders\is-SS4GT.tmp	is-B3E7U.tmp
File created	C:\Program Files (x86)\PrintFolders\is-P2ODN.tmp	is-B3E7U.tmp
File created	C:\Program Files (x86)\PrintFolders\is-AOB00.tmp	is-B3E7U.tmp
File created	C:\Program Files (x86)\PrintFolders\is-VQCGP.tmp	is-B3E7U.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
3940	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4244	ntFolders.exe
4244	ntFolders.exe
4244	ntFolders.exe
4244	ntFolders.exe
4244	ntFolders.exe
4244	ntFolders.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3940	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 3212 wrote to memory of 840	3212	file.exe	82
PID 3212 wrote to memory of 840	3212	file.exe	82
PID 3212 wrote to memory of 840	3212	file.exe	82
PID 840 wrote to memory of 4244	840	is-B3E7U.tmp	83
PID 840 wrote to memory of 4244	840	is-B3E7U.tmp	83
PID 840 wrote to memory of 4244	840	is-B3E7U.tmp	83
PID 4244 wrote to memory of 4752	4244	ntFolders.exe	84
PID 4244 wrote to memory of 4752	4244	ntFolders.exe	84
PID 4244 wrote to memory of 4752	4244	ntFolders.exe	84
PID 4244 wrote to memory of 564	4244	ntFolders.exe	92
PID 4244 wrote to memory of 564	4244	ntFolders.exe	92
PID 4244 wrote to memory of 564	4244	ntFolders.exe	92
PID 564 wrote to memory of 3940	564	cmd.exe	94
PID 564 wrote to memory of 3940	564	cmd.exe	94
PID 564 wrote to memory of 3940	564	cmd.exe	94

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:3212
- C:\Users\Admin\AppData\Local\Temp\is-3EU1B.tmp\is-B3E7U.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-3EU1B.tmp\is-B3E7U.tmp" /SL4 $90060 "C:\Users\Admin\AppData\Local\Temp\file.exe" 2048840 96256
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:840
- - C:\Program Files (x86)\PrintFolders\ntFolders.exe
    "C:\Program Files (x86)\PrintFolders\ntFolders.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:4244
  - - C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\kLAb1H.exe
      4⤵
      Executes dropped EXE
      PID:4752
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "ntFolders.exe" /f & erase "C:\Program Files (x86)\PrintFolders\ntFolders.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:564
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "ntFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:3940

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

ntFolders.exe

Path C:\Program Files (x86)\PrintFolders\ntFolders.exe
Size 3.2MB
SHA256 cf2ab0ef05ddd69ad0cd7c47b9b0dd47f77fea4f9684e8684f9576bcc51629bd
MD5 ba905b4c8c78adbc01e986f52dac59fc
SHA1 7a1ae97f3b82a54da5f9ec4af9fea840662e9a3d
SHA512 cc4ec0bbb5d2d3573391314ca93e4cf2ef2b7cfecfd655473a26572c7e08596ee25d2f4deb808131e639ab5bc92dee77894904896ee3eafec9754c7c89592ec1
SSDEEP 98304:1jo0FIwxSt+GXnlfRrJoSEAbtp+xDit5F:1X2yS5F
MD5 SHA1 SHA512 SSDEEP

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ntFolders.exe

Path C:\Program Files (x86)\PrintFolders\ntFolders.exe
Size 3.2MB
SHA256 cf2ab0ef05ddd69ad0cd7c47b9b0dd47f77fea4f9684e8684f9576bcc51629bd
MD5 ba905b4c8c78adbc01e986f52dac59fc
SHA1 7a1ae97f3b82a54da5f9ec4af9fea840662e9a3d
SHA512 cc4ec0bbb5d2d3573391314ca93e4cf2ef2b7cfecfd655473a26572c7e08596ee25d2f4deb808131e639ab5bc92dee77894904896ee3eafec9754c7c89592ec1
SSDEEP 98304:1jo0FIwxSt+GXnlfRrJoSEAbtp+xDit5F:1X2yS5F
MD5 SHA1 SHA512 SSDEEP

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is-B3E7U.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-3EU1B.tmp\is-B3E7U.tmp
Size 687KB
SHA256 2820d4bdbd9cab3eee82c86b11cfb2b8ec55247bcb975331078ecd182c1471b2
MD5 2c3832fdf847813369ec960cd39c8265
SHA1 35b24c0b451e987c1e2b07b670a65fbcb02b118c
SHA512 408a642264e967aaa78cc7b58529aaa152ba85af12a4dc7dba0a82e560e08299031cb45d8de78e5fa26f03fc6db863344aaa68e010f7ddda4fc29501365d986a
SSDEEP 12288:gh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrvo6xOM:y5NoqWolrP837JzHvA6yknyWFxvVxOM
MD5 SHA1 SHA512 SSDEEP

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is-B3E7U.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-3EU1B.tmp\is-B3E7U.tmp
Size 687KB
SHA256 2820d4bdbd9cab3eee82c86b11cfb2b8ec55247bcb975331078ecd182c1471b2
MD5 2c3832fdf847813369ec960cd39c8265
SHA1 35b24c0b451e987c1e2b07b670a65fbcb02b118c
SHA512 408a642264e967aaa78cc7b58529aaa152ba85af12a4dc7dba0a82e560e08299031cb45d8de78e5fa26f03fc6db863344aaa68e010f7ddda4fc29501365d986a
SSDEEP 12288:gh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrvo6xOM:y5NoqWolrP837JzHvA6yknyWFxvVxOM
MD5 SHA1 SHA512 SSDEEP

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_iscrypt.dll

Path C:\Users\Admin\AppData\Local\Temp\is-A6UJ4.tmp\_iscrypt.dll
Size 2KB
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
MD5 SHA1 SHA512

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kLAb1H.exe

Path C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\kLAb1H.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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kLAb1H.exe

Path C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\kLAb1H.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/3212-156-0x0000000000400000-0x000000000041E000-memory.dmp

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memory/3212-132-0x0000000000400000-0x000000000041E000-memory.dmp

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memory/3212-138-0x0000000000400000-0x000000000041E000-memory.dmp

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memory/4244-144-0x0000000000400000-0x000000000153F000-memory.dmp

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memory/4244-148-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/4244-152-0x0000000000400000-0x000000000153F000-memory.dmp

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memory/4244-143-0x0000000000400000-0x000000000153F000-memory.dmp

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memory/4244-155-0x0000000000400000-0x000000000153F000-memory.dmp

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