nymaim | e89c45654c2a0f12c6b8e488b46cb54a535a04cc7d98c37118ae47e30bdcff3c

Analysis

max time kernel
120s
max time network
125s
platform
windows10-2004_x64
resource
win10v2004-20221111-en
resource tags

arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
submitted
22/11/2022, 00:46

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General

Target
file.exe
Size 1.3MB
Sample221122-a4msgadd34
SHA256 e89c45654c2a0f12c6b8e488b46cb54a535a04cc7d98c37118ae47e30bdcff3c
MD5 7a9ad2d40c762a16a2094a106d7501f2
SHA1 a7abe50a91dcc7087219f6a2f8e7d3885a98edf6
SHA512 e979bc6a2edc4e2932f4b7436db77a0b0cc8d4496b84e57dff550627e050cf292bdfe7d88e12b5e226984f3f7325d84373cd10af957c4900dacd07812167c08a
SSDEEP 24576:tizLQVt+C+0ejWFKRx8B431/sUvycFBqHK8nOX/OIgZIY7eCLxYiA:GLQ9+RWMRxZ3tzvyi6K8nOX/OnNeViA
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
2392	is-JUMD0.tmp
2572	PrintFolders.exe
5012	5PHdWwHco.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-1-5-21-2971393436-602173351-1645505021-1000\Control Panel\International\Geo\Nation	PrintFolders.exe

Loads dropped DLL 1 IoCs

pid	Process
2392	is-JUMD0.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-7MBI7.tmp	is-JUMD0.tmp
File created	C:\Program Files (x86)\PrintFolders\is-T8O4H.tmp	is-JUMD0.tmp
File created	C:\Program Files (x86)\PrintFolders\is-HTI21.tmp	is-JUMD0.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-JUMD0.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\PrintFolders.exe	is-JUMD0.tmp
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-JUMD0.tmp
File created	C:\Program Files (x86)\PrintFolders\is-61D45.tmp	is-JUMD0.tmp
File created	C:\Program Files (x86)\PrintFolders\is-M9VMN.tmp	is-JUMD0.tmp
File created	C:\Program Files (x86)\PrintFolders\is-KGSTT.tmp	is-JUMD0.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
2620	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2572	PrintFolders.exe
2572	PrintFolders.exe
2572	PrintFolders.exe
2572	PrintFolders.exe
2572	PrintFolders.exe
2572	PrintFolders.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2620	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2580 wrote to memory of 2392	2580	file.exe	85
PID 2580 wrote to memory of 2392	2580	file.exe	85
PID 2580 wrote to memory of 2392	2580	file.exe	85
PID 2392 wrote to memory of 2572	2392	is-JUMD0.tmp	86
PID 2392 wrote to memory of 2572	2392	is-JUMD0.tmp	86
PID 2392 wrote to memory of 2572	2392	is-JUMD0.tmp	86
PID 2572 wrote to memory of 5012	2572	PrintFolders.exe	90
PID 2572 wrote to memory of 5012	2572	PrintFolders.exe	90
PID 2572 wrote to memory of 5012	2572	PrintFolders.exe	90
PID 2572 wrote to memory of 4220	2572	PrintFolders.exe	95
PID 2572 wrote to memory of 4220	2572	PrintFolders.exe	95
PID 2572 wrote to memory of 4220	2572	PrintFolders.exe	95
PID 4220 wrote to memory of 2620	4220	cmd.exe	97
PID 4220 wrote to memory of 2620	4220	cmd.exe	97
PID 4220 wrote to memory of 2620	4220	cmd.exe	97

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2580
- C:\Users\Admin\AppData\Local\Temp\is-J25N0.tmp\is-JUMD0.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-J25N0.tmp\is-JUMD0.tmp" /SL4 $D0062 "C:\Users\Admin\AppData\Local\Temp\file.exe" 1087786 51712
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:2392
- - C:\Program Files (x86)\PrintFolders\PrintFolders.exe
    "C:\Program Files (x86)\PrintFolders\PrintFolders.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:2572
  - - C:\Users\Admin\AppData\Roaming\{6e1ce040-6208-11ed-b5ce-806e6f6e6963}\5PHdWwHco.exe
      4⤵
      Executes dropped EXE
      PID:5012
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "PrintFolders.exe" /f & erase "C:\Program Files (x86)\PrintFolders\PrintFolders.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:4220
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "PrintFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:2620

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

PrintFolders.exe

Path C:\Program Files (x86)\PrintFolders\PrintFolders.exe
Size 1.5MB
SHA256 f078702fc9239a4652439ae2ccb011d9ab81b69dbb841a24ce2df6201300c9f5
MD5 6f6a5d1428d141d8fa3aea27de623ac5
SHA1 4ff23be3e8c7d9cc664291ac08be7be97740d828
SHA512 da68a9bc25fe72a26807e56e93dee731a9cbc910b39a40998fd665f455ce89b30338e4021df0e28f4bc7475d0fd15abf6eac808269ed0c0f8be9184b4c89d9b3
SSDEEP 24576:7+2++CN+rN+bK+iK+K+h+NP21T/LSl8vG3ir0uDZCg3tAR97xp32yqiIYoQ5Jgwd:i2nC8IbDkDwc9/efiAMYxUE/oQp
MD5 SHA1 SHA512 SSDEEP

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PrintFolders.exe

Path C:\Program Files (x86)\PrintFolders\PrintFolders.exe
Size 1.5MB
SHA256 f078702fc9239a4652439ae2ccb011d9ab81b69dbb841a24ce2df6201300c9f5
MD5 6f6a5d1428d141d8fa3aea27de623ac5
SHA1 4ff23be3e8c7d9cc664291ac08be7be97740d828
SHA512 da68a9bc25fe72a26807e56e93dee731a9cbc910b39a40998fd665f455ce89b30338e4021df0e28f4bc7475d0fd15abf6eac808269ed0c0f8be9184b4c89d9b3
SSDEEP 24576:7+2++CN+rN+bK+iK+K+h+NP21T/LSl8vG3ir0uDZCg3tAR97xp32yqiIYoQ5Jgwd:i2nC8IbDkDwc9/efiAMYxUE/oQp
MD5 SHA1 SHA512 SSDEEP

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_iscrypt.dll

Path C:\Users\Admin\AppData\Local\Temp\is-9SACP.tmp\_iscrypt.dll
Size 2KB
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
MD5 SHA1 SHA512

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is-JUMD0.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-J25N0.tmp\is-JUMD0.tmp
Size 643KB
SHA256 1441464feeef365573af18802c464769b7d3107624fde24604f57e386f97f1a7
MD5 85b94e72c3f2d2b5464e2aaf3c9e242a
SHA1 ce7ccae5f50a990d059d59292d4a332979e162ba
SHA512 c0c27189989db482be9bda5b6b8b1441bdc5e9b0f3a414ccab4c4be516e7f99e25717845361a5b196114502faaaf21bec7aca91b497acd2e2396f49c31850880
SSDEEP 12288:Oh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrvJxO0:05NoqWolrP837JzHvA6yknyWFxvJxO0
MD5 SHA1 SHA512 SSDEEP

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is-JUMD0.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-J25N0.tmp\is-JUMD0.tmp
Size 643KB
SHA256 1441464feeef365573af18802c464769b7d3107624fde24604f57e386f97f1a7
MD5 85b94e72c3f2d2b5464e2aaf3c9e242a
SHA1 ce7ccae5f50a990d059d59292d4a332979e162ba
SHA512 c0c27189989db482be9bda5b6b8b1441bdc5e9b0f3a414ccab4c4be516e7f99e25717845361a5b196114502faaaf21bec7aca91b497acd2e2396f49c31850880
SSDEEP 12288:Oh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrvJxO0:05NoqWolrP837JzHvA6yknyWFxvJxO0
MD5 SHA1 SHA512 SSDEEP

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5PHdWwHco.exe

Path C:\Users\Admin\AppData\Roaming\{6e1ce040-6208-11ed-b5ce-806e6f6e6963}\5PHdWwHco.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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5PHdWwHco.exe

Path C:\Users\Admin\AppData\Roaming\{6e1ce040-6208-11ed-b5ce-806e6f6e6963}\5PHdWwHco.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/2572-151-0x0000000000400000-0x000000000137F000-memory.dmp

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memory/2572-142-0x0000000000400000-0x000000000137F000-memory.dmp

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memory/2572-143-0x0000000000400000-0x000000000137F000-memory.dmp

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memory/2572-147-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/2572-154-0x0000000000400000-0x000000000137F000-memory.dmp

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memory/2580-138-0x0000000000400000-0x0000000000413000-memory.dmp

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memory/2580-132-0x0000000000400000-0x0000000000413000-memory.dmp

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memory/2580-155-0x0000000000400000-0x0000000000413000-memory.dmp

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